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NL2033170B1 - Offshore drilling vessel and installation for perforing subsea wellbore related activities - Google Patents

Offshore drilling vessel and installation for perforing subsea wellbore related activities Download PDF

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Publication number
NL2033170B1
NL2033170B1 NL2033170A NL2033170A NL2033170B1 NL 2033170 B1 NL2033170 B1 NL 2033170B1 NL 2033170 A NL2033170 A NL 2033170A NL 2033170 A NL2033170 A NL 2033170A NL 2033170 B1 NL2033170 B1 NL 2033170B1
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NL
Netherlands
Prior art keywords
piston
chamber
hydraulic
cylinder
hull
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Application number
NL2033170A
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Dutch (nl)
Inventor
Bernardus Wijning Diederick
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Itrec Bv
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Publication date
Application filed by Itrec Bv filed Critical Itrec Bv
Priority to NL2033170A priority Critical patent/NL2033170B1/en
Priority to PCT/EP2023/075817 priority patent/WO2024068366A1/en
Priority to EP23773270.6A priority patent/EP4594594A1/en
Application granted granted Critical
Publication of NL2033170B1 publication Critical patent/NL2033170B1/en

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
    • E21B19/09—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods specially adapted for drilling underwater formations from a floating support using heave compensators supporting the drill string

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

-16- A B S T R A C T An offshore drilling vessel comprises a floating hull, a moonpool, and a drilling tower. A main hoisting device comprises a travelling top drive carrier, a top sheave assembly with carrier 5 suspension cable sheaves, and vertically oriented hydraulic piston-and-cylinder type lift devices. Carrier suspension cables have one end secured to the carrier and extend over a respective sheave to another end connected to one of an anchor or to a winch fixed in relation to the hull. A vertically mobile working deck is provided with a slip device that is configured to suspend a tubulars string in the firing line. 10

Description

P35960NL00
OFFSHORE DRILLING VESSEL AND INSTALLATION FOR PERFORMING SUBSEA
WELLBORE RELATED ACTIVITIES.
The invention relates to an offshore drilling vessel and installation for performing subsea wellbore related activities.
Inthe field some offshore drilling vessels are in use that are provided with a drilling installation that is known under the tradename RamRig, originally developed by the company
Maritime Hydraulics AS in Norway.
For example, US6095501 and US6094910 disclose an offshore drilling vessel with a RamRig drilling installation having tower that is positioned on the floating hull over or adjacent to the moonpool and with a main hoisting device. This main hoisting device comprises: - a travelling top drive carrier adapted to support a top drive and a drilling tubulars string extending along a firing line through said moonpool; - a top sheave assembly that is guided vertically relative to an elevated portion of the tower and comprises carrier suspension cable sheaves, - vertically oriented hydraulic piston-and-cylinder type lift devices, each having a cylinder body and a piston rod, said lift devices each having one of the cylinder and the piston rod thereof fixed in relation to the hull and the other one of the cylinder and the piston rod supporting the top sheave assembly thereon so as to be vertically mobile relative to the tower, - carrier suspension cables, each carrier suspension cable having one end thereof secured to the travelling top drive carrier and extending over a respective sheave of the top sheave assembly to another end of the carrier suspension cable, said other end being connected to an anchor that is fixed in relation to the hull, - a hydraulic circuit connected to said lift devices and including a hydraulic pump, said hydraulic circuit being configured to lift the travelling top drive carrier by extension of the one or more lift devices.
In the operational RamRig installations, a set of hydraulic pumps in the hydraulic circuit provides a desired hydraulic liquid flow to the lift devices to lift the travelling top drive carrier and a drilling tubulars string when connected to the top drive carrier. In some practical embodiments, the lift devices are single-acting hydraulic cylinders. Other embodiments are double acting. The lift devices each have a lift chamber delimited by the piston so that supply of hydraulic liquid to the chamber causes a lift motion of the travelling top drive carrier. The heave compensation of the travelling top drive carrier is achieved by means of these lift devices. The hydraulic circuit includes a pressurized gas buffer connected via a piston accumulator to the hydraulic circuit. In embodiments, active heave compensation is obtained by control of the hydraulic pumps on the basis of a heave sensor, which results in controlled extension and retraction of the lift devices. Passive heave compensation is done on the basis of the pressurized gas buffer as is known in the art. Effectively the piston rods of the lift devices then rest on a gas spring. Hoisting and lowering is possible by means of control of the pumps.
In the known vessels having a RamRig installation, as also shown in US6095501 and in
US6094910, a drill floor is stationary arranged above the moonpool, with a slip device being mounted on the drill floor as is common in the field. The slip device is configured to suspend a tubulars string in the firing line, e.g. when tripping in or tripping out a drill string from a subsea wellbore, or during an actual drilling process.
In W02021/165143 an offshore drilling vessel for performing subsea wellbore related activities is discussed, wherein a vessel having RamRig installation is further provided with a vertically mobile working deck, which is vertically movable with respect to the tower and to the hull along the firing line within a motion range including a heave compensation motion range. The working deck is provided with a slip device that is configured to suspend a tubulars string in said firing line. The vertically mobile working deck is suspended from at least one working deck suspension cable, which working deck suspension cable is reeved independent from the one or more lift devices, so that vertical position and vertical motion of the working deck are independent of the operation of said one of more lift devices.
In W02021/165143 an integrated heave compensation system is provided that is configured to establish, in operation thereof, a heave compensated motion of the vertically mobile working deck relative to the tower and to the hull within said heave compensation motion range and a synchronous heave compensated motion of the travelling top drive carrier in order to obtain synchronous heave compensated motions of the vertically mobile working deck and the travelling top drive carrier. This system comprises a common heave compensation device that acts on both the one or more carrier suspension cables and the one or more working deck suspension cables so that when a load formed by a tubulars string initially suspended from the travelling top drive carrier is transferred to the slip device or vice versa, the load on the common heave compensation device remains substantially the same.
For example, tripping a drill string into a wellbore can now be performed in full heave compensation mode, avoiding undue vertical motion of the drill string in the wellbore, e.g. thereby avoiding undue pressure variations in the wellbore which may occur when the slip device would not be heave compensated.
The present invention aims to provide a vessel with a RamRig installation and having a vertically mobile working deck wherein the synchronous heave compensation functionality is present in a structurally attractive manner.
The present invention provides an offshore drilling vessel for performing subsea wellbore related activities according to the preamble of claim 1, which is based on US6094910, and is characterized in that the vessel further comprises a vertically mobile working deck, which is vertically movable with respect to the tower and to the hull along the firing line within a motion range including a heave compensation motion range, wherein the working deck is provided with a slip device that is configured to suspend a tubulars string in said firing line, wherein the vertically mobile working deck is supported by at least one hydraulic piston-and- cylinder type working deck motion device that is distinct from the vertically oriented hydraulic piston-and-cylinder type lift device, wherein the cylinder type working deck motion device has a cylinder body and a piston rod with a piston, wherein one of the cylinder and the piston rod thereof is fixed in relation to the hull and the other one of the cylinder and the piston rod supports vertically mobile working deck, wherein the cylinder type working deck motion device has a hydraulic liquid filled first chamber such that supply of hydraulic liquid to the lift chamber causes a lifting of the vertically mobile working deck, and wherein the cylinder type working deck motion device has a hydraulic liquid filled second chamber separated from the first chamber by the piston, wherein the hydraulic circuit connects the second chamber of the cylinder type working deck motion device to the lift chamber of the lift device and to the hydraulic pump, wherein the hydraulic liquid filled chamber of the piston accumulator is connected to the first chamber of the cylinder type working deck motion device.
Due to the inventive structure, an integrated heave compensation system is provided that is configured to establish, in operation thereof, a heave compensated motion of the vertically mobile working deck relative to the tower and to the hull within said heave compensation motion range and a synchronous heave compensated motion of the travelling top drive carrier in order to obtain synchronous heave compensated motions of the vertically mobile working deck and the travelling top drive carrier.
Due to the inventive structure, as discussed in WO2021/165143, when a load formed by a tubulars string initially suspended from the travelling top drive carrier is transferred to the slip device or vice versa, the load on the heave compensation system remains substantially the same.
For example, tripping a drill string into a wellbore can now be performed in full heave compensation mode, avoiding undue vertical motion of the drill string in the wellbore, e.g. thereby avoiding undue pressure variations in the wellbore which may occur when the slip device would not be heave compensated.
In practical embodiments, the hydraulic circuit further comprises an arrangement of one or more valves to control operation of the drilling installation. For example, one or more valves are arranged and configured to selectively close the connection between cylinder type working deck motion device and the pump, so that the lift chamber of the lift device is connected to the pump and not to the heave compensation assembly with the piston accumulator and gas buffer. The lift device can then be extended, yet without heave compensation afforded by this heave compensation assembly. For example, one ar more valves are arranged and configured to selectively close the connection between lift device and the pump, e.g. allowing to solely control motion of the working deck. For example, the working deck can so be lowered to a stationary resting position relative to the hull.
For example, the working deck is movable into a stationary resting position relative to the hull. For example, in said stationary resting position, the mobile working deck is flush with an adjacent deck of the vessel. For example, locking means are provided that are configured to lock the mobile working deck relative to the hull in the stationary resting position.
For example, the working deck rests directly on top of one or more vertically orientated cylinder type working deck motion devices, that are connected to the hull, e.g. arranged in part within the moonpool.
In embodiments, the cylinder type working deck motion device is a double-ended hydraulic cylinder, wherein the piston rod extends through both ends of the cylinder body so as to create equal cross-sections of the first and second chambers.
In embodiments, the piston accumulator is configured to provide active heave compensation.
Herein the accumulator has an active heave compensation drive of the piston separating the gas filled chamber and the liquid filled chamber. For example, the active heave compensation drive comprises an extension of the piston accumulator that defines a double acting hydraulic drive cylinder of which the piston rod is connected to the piston separating the gas filled chamber and the liquid filled chamber. A piston motion sensor may be provided to control operation of the active heave compensation drive.
Preferably, the carrier suspension cables, each having one end thereof secured to the travelling top drive carrier and extending over a respective sheave of the top sheave assembly to another end of the carrier suspension cable, said other end being connected to one of an anchor that is fixed in relation to the hull. In another embodiment, said other end is connected to a winch.
It is noted that, in embodiments, the working deck may be rather small, e.g. just big enough to support the slip device thereon. In other, more preferred, embodiments, the working deck simulates a drill floor, e.g. accessible for drilling personnel, e.g. with an iron roughneck device and/or other well center related equipment arranged thereon or arrangeable thereon.
In an embodiment, the vessel is provided with a heave motion compensating racker system comprising at least one racker device that is adapted to move a tubulars section, e.g. a drill pipe section, between a tubulars storage rack - that is mounted on the hull or tower vessel and subjected to heave motion - and a position wherein the tubulars section is in said firing line and between the vertically mobile working deck and the travelling top drive carrier, wherein said racker device comprises multiple racker assemblies, each of said racker assemblies having a motion arm and a gripper member at an end of said motion arm, said gripper member being adapted to grip a tubulars section, wherein said racker device further comprises an associated heave motion synchronization system configured to bring, in operation thereof, said racker assemblies in a heave compensation mode with respect to the tower so that a tubular section that has been retrieved from the storage rack by means of said racker assemblies of said racker device is brought into a vertical motion that is synchronous with the heave motion of the mobile working deck and of the slip device provided on said mobile working deck. For example, a heave motion compensating racker system as disclosed in WO2015/133895 is provided for.
The present invention also relates to a drilling installation comprising a tower, main hoisting device, and mobile working deck as described herein, configured for installation on the floating hull of a drilling vessel, e.g. in view of retrofitting existing drilling vessels.
The present invention also relates to a method for performing a subsea wellbore related activity, wherein use is made of a vessel according to the invention. For example, the activity is one of tripping in or tripping out a tubulars string.
The invention will now be discussed with reference to the drawings. In the drawings: - figs. 1a,b show an offshore drilling vessel provided with a drilling installation according to the prior art, -figs. 2a, b show the prior art offshore drilling vessel of figures 1a, b more schematically, - fig. 3 schematically shows the drilling installation according to the prior art including the hydraulic circuit and heave compensation system, - fig. 4 schematically shows an example of the drilling installation according to the invention.
With reference to figures 1a,b, and the more schematic figures 2a,b, as well as figure 3 first a prior art offshore drilling vessel for performing subsea wellbore related activities will be discussed. This vessel is equipped with a prior art RamRig drilling installation.
The vessel 1 has a floating hull 2 subjected to heave motion during drilling, here a mono-hull, comprising a moonpool 3. In another embodiment, for example, the vessel is a semi- submersible vessel having submergible pontoons (possibly an annular pontoon) with columns thereon that support an above-waterline deck box structure. The moonpool may then be arranged in the deck box structure.
The figures 1a,b and 2a,b show a cross-section of the vessel 1 across the moonpool 3.
A drilling tower 10 is positioned on the hull at or near the moonpool 3, so as to perform wellbore related operation along a firing line 4 through the moonpool 3.
The vessel is equipped with a drilling tower 10 at or near the moonpool. Here the tower 10 is a gantry structure over the moonpool having two legs 11, 12 on opposite sides of the moonpool 3 and a gantry top over the moonpool 3. The tower 10 is embodied as a latticework.
As shown in, for example, WO2017/192046, the tower could also be embodied as a singular structure along a side of the moonpool. In the WO2017/192046 this embodiment is provided as a latticework tower.
In another embodiment, the tower is a singular mast having a closed outer wall and having a top and a base. The base of the mast is secured to the hull.
In the figures 1a,b, and 2a,b it is shown that a drill floor 15 is stationary arranged above the moonpool 3.
A slip device 20 is mounted on the drill floor 15 as is common in the field. The slip device 20 is configured to suspend a tubulars string in the firing line 4, e.g. when tripping in or tripping out a drill string from a subsea wellbore, or during an actual drilling process.
The figures 1a,b and 2a,b show a main hoisting device 30 comprising a travelling top drive carrier 35 that is adapted to support a top drive 36 and a drilling tubulars string 100, e.g. via an elevator that is suspended from the top drive 36 or from the carrier 35 directly. The string 100 extends along the firing line 4 through the moonpool 3.
The carrier 35 is guided vertically along the tower 10 over one or more vertical guide rails 14, 15, e.g. one guide rail along each leg 11, 12 of the gantry type tower.
The figures 1a,b and 2a,b show a top sheave assembly 40 that is guided vertically, e.g. on the same guide rails 14,15, relative to an elevated portion of the tower 10. The assembly 40 comprises one or more carrier suspension cable sheaves 41.
The figures 1a,b and 2a,b show vertically oriented hydraulic piston-and-cylinder type lift devices 50, each having a cylinder body 51 and a piston rod 52. These lift devices 50 each having one of the cylinder and the piston rod thereof fixed in relation to the hull 2 and the other one of the cylinder and the piston rod supports the top sheave assembly 40 thereon so as to be vertically mobile relative to the tower.
The figures 1a,b and 2a,b show carrier suspension cables 55, each carrier suspension cable having one end 56 thereof secured to the travelling top drive carrier 35. The cables 55 each extend over a respective sheave 41 of the top sheave assembly 40 to another end 57 of the carrier suspension cable. This other end 57 is connected to an anchor 60 that is fixed in relation to the hull, e.g. embodied as an equalizing anchor as described in US6095501.
As is known in the art, and for example as described in any of US6095501, US6094910, and/or WO2017/192046, a hydraulic circuit 80 is connected to the lift devices 50.
The figures 1a, 2a show the lift devices 50 when fully retracted, and the figures 1b, 2b show the lift devices in extended position thereof.
As is known in the art, and for example as described in any of US6095501, US6094910, and/or WO2017/192048, the lift devices 50 can be operated in passive or active heave compensation mode by suitable operation of the circuit 80, and thereby the assembly 40 is heave compensated, which results in the carrier 35 being heave compensated.
This circuit 80 includes a hydraulic pump 81, e.g. multiple pumps in parallel.
The hydraulic circuit 80 includes a hydraulic line 82 connecting the hydraulic pump 81 to the lift chamber 50a of the lift device 50 so as to lift the travelling top drive carrier 35 by extension of the lift device 50.
The hydraulic circuit further includes a pressurized gas buffer 90 and an associated piston accumulator 95 to provide heave compensation of the travelling top drive carrier 35.
The piston accumulator 95 has a gas filled chamber 95a that is connected to the pressurized gas buffer 90 and hydraulic liquid filled chamber 95b that is separated from the gas filled chamber 95a by a piston 96.
The hydraulic line 82 connects to the hydraulic liquid filled chamber 95b.
As illustrated, one or more valves 101, 102, 103 may be provided in the hydraulic circuit. For example, valves 101, 102 control the connection of the lift device(s) 50 to the pump 81, and valve 103 control the connection of the piston accumulator 90 to the line 82.
The figure 3 illustrates an embodiment of the piston accumulator 95 which allows for active heave compensation, when desired. Herein the accumulator has an active heave compensation drive 98 of the piston 96 that separates the gas filled chamber 95a and the liquid filled chamber 95b. It is illustrated that the active heave compensation drive comprises an extension of the piston accumulator 90 that defines a double acting hydraulic drive cylinder 99 of which the piston rod is connected to the piston 96 separating the gas filled chamber and the liquid filled chamber. A piston motion sensor may be provided to control operation of the active heave compensation drive.
Figure 4 illustrates an example of the invention. Components already discussed with reference to the illustrated prior art embodiment, are denoted with the same reference numeral.
Figure 4 illustrates that a vertically mobile working deck 70 is provided, which is vertically movable with respect to the tower 10 and to the hull 2 along the firing line within a motion range including a heave compensation motion range.
The working deck 70 is provided with the slip device 20 that is configured to suspend a tubulars string 100 in the firing line.
The vertically mobile working deck 70 is supported by at least one hydraulic piston-and- cylinder type working deck motion device 110 that is distinct from the vertically oriented hydraulic piston-and-cylinder type lift devices 50.
Each cylinder type working deck motion device 110 has a cylinder body 111 and a piston rod 112 with a piston, wherein the cylinder is fixed in relation to the hull 2 and the piston rod 112 supports vertically mobile working deck 70.
The cylinder type working deck motion device 110 has a hydraulic liquid filled first chamber 110a such that supply of hydraulic liquid to the lift chamber causes a lifting of the vertically mobile working deck 70.
The cylinder type working deck motion device has a hydraulic liquid filled second chamber 110b separated from the first chamber 110a by the piston 113.
The hydraulic circuit connects the second chamber 110b of the cylinder type working deck motion device 110 to the lift chamber 50a of the lift device 50 and to the hydraulic pump 82.
The hydraulic liquid filled chamber 95b of the piston accumulator 95 is connected to the first chamber 110a of the cylinder type working deck motion devices 110.
lt is illustrated, as preferred, that the cylinder 110 is embodied as a so-called double ended hydraulic cylinder. Herein the piston rod 112 of the cylinder type working deck motion device 110 extends through both ends of the cylinder body 111 so as to create equal cross-sections of the chambers 110a, 110b.
An integrated heave compensation system is provided that is configured to establish, in operation thereof, a heave compensated motion of the vertically mobile working deck 70 provided with slip device 20 within a heave compensation motion range and a synchronous heave compensated motion of the travelling top drive carrier 35 in order to obtain synchronous heave compensated motions of the vertically mobile working deck 70 and the travelling top drive carrier 35.
When a load formed by a tubulars string 100 initially suspended from the travelling top drive carrier 35 is transferred to the slip device 20 on the working deck 70 or vice versa, the load on the heave compensation accumulator 90 remains substantially the same.
For example, tripping a drill string 100 into a wellbore can now be performed in full heave compensation mode, avoiding undue vertical motion of the drill string in the wellbore, e.g. thereby avoiding undue pressure variations in the wellbore which may occur when the slip device 20 would not be heave compensated, e.g. as the slip device 20 is fixed in relation to the hull 2 of the vessel. lt is illustrated that a valve 105 may be provided to allow for selective disconnection of the motion devices 110, and thus the discussed heave compensation system, from the pump 82.
This e.g. allows for operation of the lift devices 82 without heave compensation.
It is illustrated that a valve 106 may be provided to control the connection of the accumulator 95 to the motion devices 110.
Whilst the figure 4 shows that the working deck 70 rests directly on top of vertically arranged motion devices 110, other arrangements for supporting the deck 70 by means of one or more motion devices 110 can be envisaged as well. For example, some form of transmission may be present between the one or more motion devices 110 and the working deck 70, e.g. including one or more cables, chains, etc. In embodiments, the working deck 70 is hanging below the one or more motion devices 110.

Claims (8)

CONCLUSIESCONCLUSIONS 1. Een offshore boorschip {1} voor het uitvoeren van met een onderzees boorgat gerelateerde activiteiten, waarbij het schip omvat: - een drijvende romp (2) omvattende een moonpool (3); - een boortoren (10) die op de romp is geplaatst bij of nabij de moonpool; - een hoofdhijsinrichting {30) omvattende: - een verplaatsende topdrive drager (35) die is ingericht om een topdrive en een boorbuizenstreng (100) die zich langs een vuurlijn (4) door de moonpool uitstrekt te dragen; - een bovenste schijvensamenstel (40) dat verticaal is geleid ten opzichte van een hoger gelegen gedeelte van de toren en een of meer dragerophangingskabelschijven (41) omvat, - ten minste een verticaal opgestelde hydraulische zuiger-en-cilinder type hefinrichting (50) met een cilinderlichaam (51) en een zuigerstang (52) met een zuiger, waarbij van de hefinrichting één van de cilinder en de zuigerstang daarvan is vastgezet in relatie tot de romp en de ander van één van de cilinder en de zuigerstang het bovenste schijvensamenstel (40) daarop draagt om zo verticaal beweegbaar te zijn ten opzichte van de toren, waarbij de hefinrichting een met hydraulische vloeistof gevulde hefkamer (50a) heeft die is begrenst door de zuiger zodat toevoer van hydraulische vloeistof aan de hefkamer een heffen van het bovenste schijvensamenstel ten opzichte van de toren bewerkstelligt, - ten minste een dragerophangingskabel (55) waarvan één einde (56) is vastgezet aan de verplaatsende topdrive drager (35) en zich over een respectieve schijf (41) van het bovenste schijvensamenstel uitstrekt naar een ander einde (57) van de dragerophangingskabel, welk andere einde is verbonden met een verankering (60) die is vastgezet in relatie tot de romp of aan een lier (200) die is vastgezet in relatie tot de romp, - een hydraulisch circuit (80) verbonden met de hefinrichting (50) en omvattende een hydraulische pomp, welk hydraulisch circuit een hydraulische leiding omvat die de hydraulische pomp verbindt met de hefkamer van de hefinrichting om zo de verplaatsende topdrive drager (35) omhoog te bewegen door het uitschuiven van de hefinrichting (50), waarbij het hydraulisch circuit verder een onder druk staande gasbuffer (90) omvat en een bijbehorende zuigeraccumulator (95) om deiningscompensatie van de verplaatsende topdrive drager te verschaffen, welke zuigeraccumulator een met gas gevulde kamer (95a)1. An offshore drilling vessel {1} for carrying out activities related to a subsea borehole, wherein the vessel comprises: - a floating hull (2) comprising a moon pool (3); - a derrick (10) placed on the hull at or near the moon pool; - a main hoist {30) comprising: - a moving top drive carrier (35) adapted to carry a top drive and a casing string (100) extending along a firing line (4) through the moon pool; - an upper sheave assembly (40) guided vertically with respect to an upper portion of the tower and comprising one or more carrier suspension cable sheaves (41), - at least one vertically arranged hydraulic piston-and-cylinder type lifting device (50) with a cylinder body (51) and a piston rod (52) with a piston, one of the cylinder and piston rod of the lifting device being fixed in relation to the body and the other of one of the cylinder and piston rod being fixed in relation to the upper disk assembly (40) thereon so as to be vertically movable relative to the tower, the lifting device having a lifting chamber (50a) filled with hydraulic fluid and bounded by the piston so that supply of hydraulic fluid to the lifting chamber causes lifting of the upper disc assembly relative to the tower, - at least one carrier suspension cable (55) one end (56) of which is secured to the moving top drive carrier (35) and extends over a respective sheave (41) of the upper sheave assembly to another end (57) of the carrier suspension cable, which other end is connected to an anchorage (60) fixed in relation to the hull or to a winch (200) fixed in relation to the hull, - a hydraulic circuit (80) connected to the lifting device ( 50) and comprising a hydraulic pump, the hydraulic circuit comprising a hydraulic line connecting the hydraulic pump to the lifting chamber of the lifting device so as to raise the moving top drive carrier (35) by extending the lifting device (50), whereby it hydraulic circuit further includes a pressurized gas buffer (90) and an associated piston accumulator (95) to provide heave compensation of the moving top drive carrier, the piston accumulator comprising a gas-filled chamber (95a) heeft die is verbonden met de onder druk staande gasbuffer en een met hydraulische vloeistof gevulde kamer (95b) die gescheiden is van de met gas gevulde kamer door een zuiger (96),connected to the pressurized gas buffer and a hydraulic fluid-filled chamber (95b) separated from the gas-filled chamber by a piston (96), gekenmerkt doordat het schip verder omvat: - een verticaal beweegbaar werkdek (70), dat verticaal beweegbaar is ten opzichte van de toren (10) en ten opzichte van de romp (2) langs de vuurlijn binnen een bewegingsbereik omvattende een deiningscompensatiebewegingsbereik,characterized in that the ship further comprises: - a vertically movable working deck (70), which is vertically movable relative to the turret (10) and relative to the hull (2) along the line of fire within a range of motion including a heave compensation range of motion, waarbij het werkdek (70) is voorzien van een slipinrichting (20) die is ingericht om een buizenstreng (100) in de vuurlijn af te hangen, waarbij het verticaal beweegbare werkdek (70) is gedragen door ten minste een hydraulische zuiger-en-cilinder type werkdekbewegingsinrichting (110) die anders is dan de verticaal opgesteld hydraulische zuiger-en-cilinder type hefinrichting (50), waarbij de cilinder type werkdekbewegingsinrichting (110) een cilinderlichaam (111) en een zuigerstang (112) met een zuiger (113) heeft, waarbij één van de cilinder en de zuigerstang daarvan is vastgezet in relatie tot de romp en de andere van de cilinder en de zuigerstang het verticaal beweegbare werkdek (70) steunt, waarbij de cilinder type werkdekbewegingsinrichting (110) een met hydraulische vloeistof gevulde eerste kamer (1104) heeft zodanig dat toevoer van hydraulische vloeistof aan de kamer een heffen van het verticaal beweegbare werkdek (70) bewerkstelligt, en waarbij de cilinder type werkdekbewegingsinrichting (110) een met hydraulische vloeistof gevulde tweede kamer (110b) heeft die van de eerste kamer gescheiden is door de zuiger (113), waarbij het hydraulisch circuit de tweede kamer (110b) van de cilinder type werkdekbewegingsinrichting (110) verbindt met de hefkamer (50a) van de hefinrichting (50) en met de hydraulische pomp (82),wherein the working deck (70) is provided with a slip device (20) adapted to suspend a pipe string (100) in the firing line, wherein the vertically movable working deck (70) is supported by at least one hydraulic piston and cylinder type work deck movement device (110) other than the vertically arranged hydraulic piston-and-cylinder type lifting device (50), wherein the cylinder type work deck movement device (110) has a cylinder body (111) and a piston rod (112) with a piston (113) , one of the cylinder and the piston rod thereof being fixed in relation to the hull and the other of the cylinder and the piston rod supporting the vertically movable work deck (70), the cylinder type work deck movement device (110) having a first chamber filled with hydraulic fluid (1104) such that supply of hydraulic fluid to the chamber causes lifting of the vertically movable work deck (70), and wherein the cylinder type work deck movement device (110) has a hydraulic fluid filled second chamber (110b) separate from the first chamber is separated by the piston (113), the hydraulic circuit connecting the second chamber (110b) of the cylinder type working deck movement device (110) with the lifting chamber (50a) of the lifting device (50) and with the hydraulic pump (82), waarbij de met hydraulische vloeistof gevulde kamer (95b) van de zuigeraccumulator (95) is verbonden met de eerste kamer (110a) van de cilinder type werkdekbewegingsinrichting (110). wherein the hydraulic fluid filled chamber (95b) of the piston accumulator (95) is connected to the first chamber (110a) of the cylinder type working deck movement device (110). 2 Offshore boorschip volgens conclusie1, waarbij de cilinder type werkdekbewegingsinrichting (110) een dubbelzijdige hydraulische cilinder is, waarbij de zuigerstang (112) zich door beide einden van het cilinderlichaam (111) uitstrekt om zo gelijk doorsneden van de eerste en tweede kamers (1104, 110b) te verschaffen.An offshore drillship according to claim 1, wherein the cylinder type work deck movement device (110) is a double-sided hydraulic cylinder, the piston rod (112) extending through both ends of the cylinder body (111) so as to have equal cross-sections of the first and second chambers (1104, 110b). 3. Offshore boorschip volgens conclusie 1 of 2, waarbij de zuigeraccumulator (5) is ingericht om een actieve deiningscompensatie te verschaffen en een actieve deiningscompensatieaandrijving (98) heeft van de zuiger (96) die de met gas gevulde kamer (95a) en de met vloeistof gevulde kamer (95b) van elkaar scheidt.Offshore drillship according to claim 1 or 2, wherein the piston accumulator (5) is arranged to provide active heave compensation and has an active heave compensation drive (98) of the piston (96) which drives the gas-filled chamber (95a) and the separates the liquid-filled chamber (95b). 4. Offshore boorschip volgens een of meer van de conclusies 1 - 3, waarbij de dragerophangingskabels elk met het andere einde daarvan zijn verbonden met een verankering (60) die is vastgezet in relatie tot de romp.Offshore drillship according to one or more of claims 1 - 3, wherein the carrier suspension cables are each connected at their other end to an anchorage (60) that is fixed in relation to the hull. 5. Een offshore boorinstallatie ingericht om op een offshore boorschip te worden aangebracht, welk boorschip een drijvende romp (2) omvattende een moonpool (3) heeft, waarbij de installatie omvat: - een boortoren (10) die is ingericht om op de romp te worden geplaatst bij of nabij de moonpool; - een hoofdhijsinrichting (30) omvattende: - een verplaatsende topdrive drager (35) die is ingericht om een topdrive en een boorbuizenstreng (100) die zich uitstrekt langs een vuurlijn (4) door de moonpool te dragen; - een bovenste schijvensamenstel (40) dat verticaal is geleid ten opzichte van een hoger gelegen gedeelte van de toren en omvattende een of meer dragerophangingskabelschijven (41}, - ten minste een verticaal opgestelde hydraulische zuiger-en-cilinder type hefinrichting (50) met een cilinderlichaam (51) en een zuigerstang (52) met een zuiger, van welke hefinrichting één van de cilinder en de zuigerstang is vastgezet in relatie tot de romp en de andere van de cilinder en de zuigerstang het bovenste schijvensamenstel (40) daarop draagt om zo verticaal beweegbaar te zijn ten opzichte van de toren, waarbij de hefinrichting een met hydraulische vloeistof gevulde hefkamer (50a) heeft die is begrensd door de zuiger zodat toevoer van hydraulische vloeistof aan de hefkamer een heffen van het bovenste schijvensamenstel ten opzichte van de toren bewerkstelligt,5. An offshore drilling installation designed to be mounted on an offshore drilling ship, which drilling ship has a floating hull (2) comprising a moon pool (3), wherein the installation comprises: - a derrick (10) designed to be mounted on the hull be placed at or near the moon pool; - a main hoist (30) comprising: - a moving top drive carrier (35) adapted to carry a top drive and a casing string (100) extending along a firing line (4) through the moon pool; - an upper sheave assembly (40) guided vertically with respect to an upper portion of the tower and comprising one or more carrier suspension cable sheaves (41}, - at least one vertically arranged hydraulic piston-and-cylinder type lifting device (50) with a cylinder body (51) and a piston rod (52) with a piston, of which lifting device one of the cylinder and piston rod is fixed in relation to the body and the other of the cylinder and piston rod carries the upper disk assembly (40) thereon so as to to be vertically movable relative to the tower, the lifting device having a lifting chamber (50a) filled with hydraulic fluid and bounded by the piston so that supply of hydraulic fluid to the lifting chamber causes a lifting of the upper sheave assembly relative to the tower, - ten minste een dragerophangingskabel (55) waarvan één einde (56) is vastgezet aan de verplaatsende topdrive drager (35) en die zich over een respectieve schijf (41) van het bovenste schijvensamenstel uitstrekt naar een ander einde (57) van de dragerophangingskabel, waarbij dat andere eind is verbonden met een verankering (60) die is vastgezet in relatie tot de romp of aan een lier (200) die is vastgezet in relatie tot de romp,- at least one carrier suspension cable (55) having one end (56) secured to the moving top drive carrier (35) and extending over a respective sheave (41) of the upper sheave assembly to another end (57) of the carrier suspension cable, said other end being connected to an anchorage (60) secured in relation to the hull or to a winch (200) secured in relation to the hull, - een hydraulisch circuit (80) verbonden met de hefinrichting (50) en omvattende een hydraulische pomp, welk hydraulisch circuit omvat een hydraulische leiding die de hydraulische pomp verbindt met de hefkamer van de hefinrichting om zo de verplaatsende topdrive drager (35) te heffen door het uitschuiven van de hefinrichting (50), waarbij het hydraulisch circuit verder omvat een onder druk staande gasbuffer (90) en een bijbehorende zuigeraccumulator (95) om deiningscompensatie van de verplaatsende topdrive drager te verschaffen, welke zuigeraccumulator een met gas gevulde kamer (95a) heeft die is verbonden met de onder druk staande gasbuffer en een met hydraulische vloeistof gevulde kamer (95b) die van de met gas gevulde kamer gescheiden is door een zuiger (96), gekenmerkt doordat- a hydraulic circuit (80) connected to the lifting device (50) and comprising a hydraulic pump, which hydraulic circuit comprises a hydraulic line connecting the hydraulic pump to the lifting chamber of the lifting device so as to lift the moving top drive carrier (35) by extending the lifting device (50), the hydraulic circuit further comprising a pressurized gas buffer (90) and an associated piston accumulator (95) to provide heave compensation of the moving top drive carrier, the piston accumulator comprising a gas-filled chamber (95a); connected to the pressurized gas buffer and a hydraulic fluid-filled chamber (95b) separated from the gas-filled chamber by a piston (96), characterized in that -een verticaal beweegbaar werkdek (70) is voorzien, dat verticaal beweegbaar is ten opzichte van de toren (10) en ten opzichte van de romp (2) langs de vuurlijn binnen een bewegingsbereik omvattende een deiningscompensatie bewegingsbereik, waarbij het werkdek (70) is voorzien van een slipinrichting (20) die is ingericht om een buizenstreng (100) in de vuurlijn af te hangen, waarbij het verticaal beweegbare werkdek (70) is gedragen door ten minste een hydraulische zuiger-en-cilinder type werkdekbewegingsinrichting (110) die anders is dan de verticaal opgesteld hydraulische zuiger-en-cilinder type hefinrichting (50),-a vertically movable working deck (70) is provided, which is vertically movable relative to the turret (10) and relative to the hull (2) along the line of fire within a range of motion including a heave compensation range of motion, the working deck (70) being provided with a slip device (20) adapted to suspend a string of tubes (100) in the firing line, the vertically movable work deck (70) being carried by at least one hydraulic piston-and-cylinder type work deck movement device (110) which is otherwise is then the vertically arranged hydraulic piston-and-cylinder type lifting device (50), waarbij de cilinder type werkdekbewegingsinrichting (110) een cilinderlichaam (111) heeft en een zuigerstang (112) met een zuiger (113), waarbij één van de cilinder en de zuigerstang daarvan is vastgezet in relatie tot de romp en de andere van de cilinder en de zuigerstang het verticaal beweegbare werkdek (70) ondersteunt, waarbij de cilinder type werkdekbewegingsinrichting (110) een met hydraulische vloeistof gevulde eerste kamer (110a) heeft zodanig dat toevoer van hydraulische vloeistof aan de kamer een heffen van het verticaal beweegbare werkdek (70) bewerkstelligt, en waarbij de cilinder type werkdekbewegingsinrichting (110) een met hydraulische vloeistof gevulde tweede kamer (110b) heeft die gescheiden is van de eerste kamer door de zuiger (113), waarbij het hydraulische circuit de tweede kamer (110b) van de cilinder type werkdekbewegingsinrichting (110) verbindt met de hefkamer (50a) van de hefinrichting (50) en met de hydraulische pomp (82), waarbij de met hydraulische vloeistof gevulde kamer {(95b) van de zuigeraccumulator (95) is verbonden met de eerste kamer (1104) van de cilinder type werkdekbewegingsinrichting (110).wherein the cylinder type working deck movement device (110) has a cylinder body (111) and a piston rod (112) with a piston (113), one of the cylinder and the piston rod thereof being fixed in relation to the hull and the other of the cylinder and the piston rod supports the vertically movable work deck (70), the cylinder type work deck moving device (110) having a first chamber (110a) filled with hydraulic fluid such that supply of hydraulic fluid to the chamber causes a lifting of the vertically movable work deck (70) , and wherein the cylinder type work deck movement device (110) has a hydraulic fluid filled second chamber (110b) separated from the first chamber by the piston (113), the hydraulic circuit comprising the second chamber (110b) of the cylinder type work deck movement device (110) connects to the lifting chamber (50a) of the lifting device (50) and to the hydraulic pump (82), the hydraulic fluid filled chamber {(95b) of the piston accumulator (95) being connected to the first chamber (1104 ) of the cylinder type working deck movement device (110). 6. Boorinstallatie volgens conclusie 5, waarbij de zuigeraccumulator (5) is ingericht om een actieve deiningscompensatie te verschaffen en een actieve deiningscompensatieaandrijving (98) heeft van de zuiger (96) die de met gas gevulde kamer (95a) en de met vloeistof gevulde kamer (95b) van elkaar scheidt.Drilling rig according to claim 5, wherein the piston accumulator (5) is arranged to provide active heave compensation and has an active heave compensation drive (98) of the piston (96) connecting the gas-filled chamber (95a) and the liquid-filled chamber (95b) separates. 7. Werkwijze het uitvoeren van een met een onderzees boorgat gerelateerde activiteit, waarbij gebruik wordt gemaakt van een schip of boorinstallatie volgens een van de conclusies 1 — 6.7. Method for carrying out an activity related to a subsea borehole, using a ship or drilling installation according to any of the claims 1 - 6. 8. Werkwijze volgens conclusie7, waarbij de activiteit een van het tripping in of het tripping out van een buizenstreng is.A method according to claim 7, wherein the activity is one of tripping in or tripping out of a pipe string.
NL2033170A 2022-09-28 2022-09-28 Offshore drilling vessel and installation for perforing subsea wellbore related activities NL2033170B1 (en)

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Citations (7)

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US6095501A (en) 1995-12-27 2000-08-01 Maritime Hydraulics As Stretch compensation in a hoisting system for a derrick
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WO2021165143A1 (en) 2020-02-17 2021-08-26 Itrec B.V. Offshore drilling vessel and installation for performing subsea wellbore related activities.

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US6094910A (en) 1995-12-22 2000-08-01 Maritime Hydraulics As Apparatus and method for raising and lowering a piston in a piston cylinder arrangement in a derrick
US6095501A (en) 1995-12-27 2000-08-01 Maritime Hydraulics As Stretch compensation in a hoisting system for a derrick
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WO2017192046A1 (en) 2016-05-06 2017-11-09 Mhwirth As Hoisting system
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