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US20160281455A1 - Crushable plug - Google Patents

Crushable plug Download PDF

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Publication number
US20160281455A1
US20160281455A1 US14/777,893 US201414777893A US2016281455A1 US 20160281455 A1 US20160281455 A1 US 20160281455A1 US 201414777893 A US201414777893 A US 201414777893A US 2016281455 A1 US2016281455 A1 US 2016281455A1
Authority
US
United States
Prior art keywords
plug
glass
pressure regulator
liquid
constant pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US14/777,893
Other languages
English (en)
Inventor
Viggo Brandsdal
Jan Tore TVERANGER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCO AS
Original Assignee
TCO AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TCO AS filed Critical TCO AS
Assigned to TCO AS reassignment TCO AS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BRANDSDAL, VIGGO, TVERANGER, Jan Tore
Publication of US20160281455A1 publication Critical patent/US20160281455A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
    • E21B33/134—Bridging plugs

Definitions

  • the present invention relates to a decomposable sealing device designed for pressure testing, zone isolation and workover of a borehole:
  • plugs of a decomposable material such as glass, ceramics, salt, etc.
  • the plug can be removed or crushed after use in such a way as to leave behind few remains or fragments. If correctly constructed, such plugs of decomposable material can be removed with or without explosives in a predictable and secure manner.
  • Plugs comprising two or more layers of glass stacked atop one another can be removed without using explosives by employing techniques that include percussive tools, pigs inserted into the decomposable material, spheres or other articles that serve to create tensions in the decomposable material, or by puncturing the layer disposed between the two or more glass strata, where the volume contains a film or a sheet of a material other than glass.
  • This layer between the two or more glass strata, comprising a film and/or a sheet of material is other than glass, may comprise a fluid, a plastic material, a rubber material, a felt material, a paper material, glue, grease, etc.
  • the volume, which may be filled with at least one of the aforementioned materials, will enable the plug to attain the desired strength and toughness during use by providing for uptake of loads exerted on the plug in the form of a differential pressure between the underside and top side of the plug.
  • NO321976 filed on 21 Nov. 2003, describes a glass plug comprising a plurality of layered or stratified glass discs having between them layers of a material other than glass.
  • NO 321976 is the first patent publication ever to describe a layered glass plug.
  • NO 321976 explains why layers of a material other than glass must be provided between the glass discs and is incorporated herein in its entirety as a particularly relevant reference.
  • NO325431 filed on 23 Mar. 2006, relates to an apparatus and method for crushing a decomposable sealing device of the aforementioned type.
  • NO325431 employs a relief chamber and an adjustable connecting means forming a fluid communication channel between the volume between the glass discs and relief chamber when the adjustable connecting means is set in open position.
  • the adjustable connecting means When the adjustable connecting means is set in open position, the content between the glass discs is “punctured” and evacuated, and the load on (one or more of) the glass strata exceeds the level they are designed to tolerate, causing them to be crushed.
  • the apparatus according to NO325431 comprises a number of pin devices arranged to point load the glass strata when the connecting means is reset, where these pin devices further serve to crush the glass strata in a safe manner when the connecting means is reset.
  • NO325431 shall function such that the plug is crushed by resetting the connecting means to an open position, so that the space between the glass strata is punctured and the pressure falls drastically and quickly. The pressure support function will thereby disappear, the glass strata will bend until they rupture and they will disintegrate one by one.
  • NO 325431 discloses the possibility of mounting pins around the glass strata, the pins being arranged to produce point loads in the glass to weaken the strength of the glass strata.
  • the pins then either function ⁇ passively>>—i.e. they stand still and come into contact with the glass strata when those are bent or after the adjustable connecting means is activated, or the pins are ⁇ actively>> actuated by means of the adjustable connecting means when activated—i.e., the pins are pushed against the glass strata and thereby produce the point load.
  • the point loads from the pins are directly caused by activation of the adjustable connecting means.
  • the disclosed function of the plug is conditional on the space between the glass strata being punctured and the pressure falling drastically and quickly, with the glass strata thus being bent and thereby point loaded.
  • the pins do not function alone, but are dependent on the evacuation of the content between the glass strata.
  • NO331150 discloses a crushable plug, for example of glass, which comprises a plurality of pin devices (studs, claws, tips, points, compression ring) which are caused to be forced radially into a glass stratum so that it is crushed, said glass stratum comprising previously formed weakened points/areas that facilitate the crushing when the pin devices are pressed in against the plug. It is further disclosed in NO331150 that the weakened areas are formed when the glass contains microcracks, like those occurring through grinding. Looking at FIG. 3 in NO331150, one then sees indicated cracks spreading inwardly in the glass from the points of the pin devices. This type of crack formation is what is assumed to have occurred when glass plugs of these kinds are crushed.
  • pin devices studs, claws, tips, points, compression ring
  • NO331150 shows a plug comprising one single glass stratum. Although the description does not rule this out, NO331150 shows no embodiments comprising several glass strata. Therefore, NO331150 gives no instruction as to how the disclosed solution could potentially be adapted to a plug comprising more than one glass stratum.
  • the present invention relates to a crushable plug comprising two or more glass strata, wherein the plug is removed without the use of explosives and without the need for any drainage or evacuation system.
  • the invention relates to an arrangement that distributes the load between the glass discs and contributes toward compensating for a change in volume when one of the glass discs moves.
  • such an arrangement may comprise a piston and spring device, where the piston exerts a pressure against the liquid between the glass discs, and wherein the spring and its properties determine how great this pressure is to be.
  • Other arrangements for example, a metal bellows or other volume compensator- and/or constant pressure regulators for load distribution, may also be employed.
  • the liquid between the glass discs is pressurized beforehand, e.g. to 100 bar, this pressure being chosen to “match” the maximum pressure that the plug must tolerate during testing, so that the load distribution between the glass discs is as optimal as possible when the load on the plug is greatest.
  • FIG. 1 shows an embodiment of the present invention prior to crushing
  • FIG. 2 shows the embodiment in FIG. 1 after one of the glasses has crackled and is about to rupture
  • FIG. 3 shows the embodiment in FIG. 1 after both of the glasses have crackled and are about to rupture
  • FIG. 4 shows an embodiment of a volume compensator/constant pressure regulator according to the present invention, wherein the intermediate space between the glasses is pressurized before the plug is subjected to the differential pressure for which it is constructed,
  • FIG. 5 shows the same embodiment as in FIG. 4 , wherein the pressure has now accumulated across the plug with greatest pressure being over the plug,
  • FIG. 6 shows the same embodiment as in FIG. 4 , wherein the pressure has now accumulated across the plug with the greatest pressure being below the plug,
  • FIG. 7 shows a second embodiment of a volume compensator/constant pressure regulator according to the present invention, comprising a bellows instead of a piston and a spring,
  • FIG. 8 shows a third embodiment of a volume compensator/constant pressure regulator according to the present invention, comprising a balloon, bubble, sphere, or the like, wherein the intermediate space between the glasses is pressurized before the plug is subjected to the differential pressure for which it is constructed, and
  • FIG. 9 shows the same embodiment as in FIG. 8 , wherein the balloon, bubble, sphere or the like is compressed because the glasses are pressed together and the volume between the glasses has become smaller.
  • FIG. 1 shows an embodiment of a plug 1 according to, the present invention.
  • This embodiment' comprises two discrete glass discs 2 . Between the glass discs is provided a liquid 3 which contributes toward load uptake and load distribution.
  • a pin-/claw device 4 which is arranged to be forced in a radial direction into the glass disc 2 around or beside which it is mounted.
  • the pin-/claw device 4 may comprise one or more pin- or claw means, and if there are several, that these may be mounted evenly or unevenly around the glass disc.
  • This pin-/claw device is arranged to cause a pressure leakage through the glass discs when activated.
  • the pin-/claw device 4 is activated in a manner suited thereto; see for example NO 331150 or NO325431.
  • the pin-/claw device 4 may also be shot, struck or activated in an axial direction from above or below; it need not be activated radially. This is not shown in the drawings, but is inherent in the idea and core of the invention.
  • At least one of the glass discs is provided with one or more weakening zones 5 , said weakening zone or zones being formed such that, in addition to facilitating the crushing, the glass disc is also crushed in such a manner as to cause a predictable pressure leakage 6 through the glass disc (ref. FIG. 2 ).
  • the aforementioned pressure leakage is conditional on there being at least one fracture surface through the glass disc extending from the top side to the underside of the glass disc (see FIG. 2 ).
  • plugs comprising drainage systems and pin devices do not, in reality, require drainage systems at all.
  • the previously assumed causal relationship between activation of the drainage system and the function of the pin devices is at best weak and probably non-existent. This means that the drainage system is, superfluous and unnecessary, with the result that one is able both to save considerable costs and to avoid unnecessary complexity and vulnerability by simply eliminating the drainage system.
  • the conventional gas plugs that currently comprise a liquid between the glass discs in addition to a drainage system and a pin-/claw device (ref. NO325431) in reality do not need the drainage system at all, at least not if the pin-/claw device is designed such that a pressure leakage occurs in accordance with the present invention.
  • the plug does not include or require a drainage system comprising a drainage hole, drainage chamber, etc. All these elements and parts included in such a drainage system increase the complexity, and thereby the vulnerability, of a plug of this type.
  • the distance between the glass discs is sufficient to allow each of the glass discs adequate space to collapse more or less completely into it after crackling of the glass disc. It has been shown, in fact, that a crackled glass disc can have considerable load carrying capacity if given support, partially or entirely, by an adjacent glass disc, an intermediate film of, e.g., a viscous liquid, glue, grease, or a layer of felt, paper or plastic.
  • FIG. 2 shows the same plug as in FIG. 1 , but now with a crackled 6 glass disc 2 with pressure leakage through it. It is understood that the features indicated in the drawings and this text are merely examples for illustrative purposes. While the plug is still intact, as shown in FIG. 1 , the total pressure difference of 300 bar is distributed across the two glass discs such that the is pressure difference over each of the glass discs is about 150 bar. A liquid 3 between the glass discs functions as a pressure-uptake and pressure-distributing medium. The liquid 3 receives and thereby distributes the pressure load between the two glass discs 2 . In FIG.
  • the pin-/claw device 4 is activated, e.g., in accordance with what is described in NO331150, so that at least one of the glass discs 2 is crackled and has at least one through-going crack 6 that has provided for a pressure leakage through this at least one glass disc 2 .
  • the pressure leakage there is now an approximately zero pressure difference across the crackled 6 glass disc, and almost the entire original pressure difference of 300 bar across the intact plug is now accumulated over the remaining glass disc. None of the glass discs are constructed to tolerate a pressure difference of 300 bar; they are designed for a pressure difference of, for example, maximum 200 bar. Thus, the second glass disc ruptures and the plug disappears.
  • FIG. 3 shows an example wherein both of the glasses are crackled, since a pressure leakage has occurred through both glass discs.
  • FIG. 4 shows a volume compensator/constant pressure regulator 20 according to the invention.
  • This comprises a piston 21 and a spring 22 , where the spring has a prestress function with a selected spring constant enabling it to generate a pressure of, for example, 200 bar on liquid 3 .
  • This regulator 20 serves to distribute the load between the glass discs 2 and to compensate for volume changes when a glass disc moves. Even with small tolerances, the glass discs 2 will be in movement when the pressure difference across the plug increases during use. This may be s a matter of small movements when the glass discs 2 settle into the gaskets 7 , bending of the glass discs under a heavy load, or movements during surges or pressure changes, etc.
  • FIG. 7 shows an alternative embodiment of such a volume compensator/constant pressure regulator.
  • This comprises a bellows 23 made of metal or another compressible/flexible/ductile s material having behind it a preloaded pressure reservoir that exerts a pressure against liquid 3 between the glasses.
  • a bellows is not unlike the combination of a piston and a spring, since the pressure reservoir functions as a spring, and the surface of the bellows as a piston.
  • Other alternative embodiments having a corresponding volume compensating effect may also be contemplated, for example as shown in FIG. 8 , comprising a balloon, bubble, sphere or the like 24 made of a similar material as the bellows mentioned above.
  • FIG. 9 shows the balloon, bubble, sphere or the like 24 in a more compressed state.
  • volume compensator/constant pressure regulator according to the present invention is shown and explained in connection with a plug without a drainage system, the volume compensator/constant pressure regulator itself will function just as well in a plug having a drainage system.
  • the objective of such a volume compensator/constant pressure regulator is to compensate for fluctuations when the glasses 2 move enough in relation to each other that the liquid volume changes. Therefore, if the volume between the glasses changes, it is advantageous to have some form of volume compensator/constant pressure regulator.
  • FIGS. 1 to 3 show in principle a plug without a volume compensator/constant pressure regulator.
  • the volume compensator/constant pressure regulator according to the present invention for use in connection with plugs of the aforementioned type, is thus distinguished by the feature that it exerts a predetermined pressure on liquid 3 located between glass discs 2 .
  • volume compensator/constant pressure regulator If one chooses not to utilize some form of volume compensator/constant pressure regulator, then, according to the invention, one can provide for pressurization of liquid 3 between the glasses 2 while the plug is being assembled, e.g., at a pressure of 150 bar. This assumes that the clearance between glass discs 2 , the gaskets and the seats 9 is quite small, so that the glass discs have minimal float between the seats. It could also be advantageous for the pressurized liquid 3 to be of a partially compressible type, permitting accommodation of a slight volume change without the pressure in the liquid disappearing entirely. In this respect, one can say that the partially compressible liquid in itself functions as a volume compensator.
  • the plug according to the present invention comprises the requisite number of, gaskets and seals, designated in the figures by references numerals 7 and 8 , respectively.
  • the glass discs 2 are positioned in an appropriate manner on annular, slanted, shoulder-formed seats 9 , which seats are arranged to receive the glasses 2 and to carry the compressive forces to which the glasses are subjected during use.

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  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Pipe Accessories (AREA)
  • Safety Valves (AREA)
  • Taps Or Cocks (AREA)
  • Closures For Containers (AREA)
  • Feeding And Controlling Fuel (AREA)
US14/777,893 2013-03-18 2014-03-17 Crushable plug Abandoned US20160281455A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO20130400 2013-03-18
NO20130400A NO337760B1 (no) 2013-03-18 2013-03-18 Anordning ved brønnplugg
PCT/NO2014/050035 WO2014148914A2 (en) 2013-03-18 2014-03-17 Crushable plug

Publications (1)

Publication Number Publication Date
US20160281455A1 true US20160281455A1 (en) 2016-09-29

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ID=50549379

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/777,893 Abandoned US20160281455A1 (en) 2013-03-18 2014-03-17 Crushable plug

Country Status (4)

Country Link
US (1) US20160281455A1 (no)
GB (1) GB2527462B (no)
NO (2) NO337760B1 (no)
WO (1) WO2014148914A2 (no)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180156002A1 (en) * 2015-06-01 2018-06-07 Tco As Destruction Mechanism for a Dissolvable Sealing Device
EP3575545A1 (en) * 2018-05-31 2019-12-04 National Oilwell Varco Norway AS Assembly for use in a wellbore, and related method
US20200095844A1 (en) * 2018-06-26 2020-03-26 SBS Technology AS Device and Method for Setting of Packing
US10808490B2 (en) 2018-05-17 2020-10-20 Weatherford Technology Holdings, Llc Buoyant system for installing a casing string
US10871053B2 (en) 2007-12-03 2020-12-22 Magnum Oil Tools International, Ltd. Downhole assembly for selectively sealing off a wellbore
US10883333B2 (en) 2018-05-17 2021-01-05 Weatherford Technology Holdings, Llc Buoyant system for installing a casing string
US10883315B2 (en) 2013-02-05 2021-01-05 Ncs Multistage Inc. Casing float tool
US20210238942A1 (en) * 2019-12-17 2021-08-05 Klx Energy Services Llc Degradable in-line buoyant system for running casing in a wellbore
US11162325B2 (en) * 2017-10-25 2021-11-02 SBS Technology AS Well tool device with a breakable ball seat
CN115142811A (zh) * 2022-06-23 2022-10-04 中国石油天然气集团有限公司 一种非旋转式可重复坐封封隔器以及其坐封、解封方法
US11459846B2 (en) * 2019-08-14 2022-10-04 Terves, Llc Temporary well isolation device
US20220356780A1 (en) * 2018-04-25 2022-11-10 Interwell Norway As Well tool device for opening and closing a fluid bore in a well
US11988067B1 (en) * 2023-01-27 2024-05-21 Baker Hughes Oilfield Operations Llc Frangible disk sub, method and system
WO2025259116A1 (en) * 2024-06-14 2025-12-18 SBS Technology AS A method and a well device for temporary well isolation during a well completion phase

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO340233B1 (no) * 2015-03-04 2017-03-27 Vosstech As Oppløsbar plugganordning
NO20151496A1 (en) * 2015-11-05 2016-06-07 Interwell Technology As Well tool device with frangible disc sealed to seat by a rubber material
NO340634B1 (en) 2016-02-12 2017-05-15 Vosstech As Well tool device with metallic contact rings
NO343832B1 (en) * 2016-04-18 2019-06-17 Fmc Kongsberg Subsea As A Cartridge plug and a method of use in a production bore.

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US20050015565A1 (en) * 2003-07-15 2005-01-20 Stuart Ryan Prototyping integrated systems
US20050155658A1 (en) * 2004-01-20 2005-07-21 White Andrew J. Hermetically sealed pressure balanced accumulator
US20090101358A1 (en) * 2006-03-23 2009-04-23 Bjorgum Mekaniske As Sealing device
US20110000663A1 (en) * 2008-03-06 2011-01-06 Viggo Brandsdal Device for plug removal
US20120012563A1 (en) * 2009-05-25 2012-01-19 Fengzhou Fang Particle beam-assisted ultra-precision machining method for single-crystal brittle materials
US20120125631A1 (en) * 2009-04-17 2012-05-24 Rasgas Company Limited Systems and Methods of Diverting Fluids In A Wellbore Using Destructible Plugs

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Publication number Priority date Publication date Assignee Title
NO321976B1 (no) * 2003-11-21 2006-07-31 Tco As Anordning ved en plugg for trykktesting av borehull
NO328882B1 (no) * 2007-09-14 2010-06-07 Vosstech As Aktiveringsmekanisme og fremgangsmate for a kontrollere denne
NO20081229L (no) * 2008-03-07 2009-09-08 Tco As Anordning ved plugg
NO328577B1 (no) * 2008-04-08 2010-03-22 Tco As Anordning ved plugg
US8276670B2 (en) * 2009-04-27 2012-10-02 Schlumberger Technology Corporation Downhole dissolvable plug

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050015565A1 (en) * 2003-07-15 2005-01-20 Stuart Ryan Prototyping integrated systems
US20050155658A1 (en) * 2004-01-20 2005-07-21 White Andrew J. Hermetically sealed pressure balanced accumulator
US20090101358A1 (en) * 2006-03-23 2009-04-23 Bjorgum Mekaniske As Sealing device
US20110000663A1 (en) * 2008-03-06 2011-01-06 Viggo Brandsdal Device for plug removal
US20120125631A1 (en) * 2009-04-17 2012-05-24 Rasgas Company Limited Systems and Methods of Diverting Fluids In A Wellbore Using Destructible Plugs
US20120012563A1 (en) * 2009-05-25 2012-01-19 Fengzhou Fang Particle beam-assisted ultra-precision machining method for single-crystal brittle materials

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11098556B2 (en) 2007-12-03 2021-08-24 Nine Energy Service, Inc. Downhole assembly for selectively sealing off a wellbore
US10871053B2 (en) 2007-12-03 2020-12-22 Magnum Oil Tools International, Ltd. Downhole assembly for selectively sealing off a wellbore
US11180958B2 (en) 2013-02-05 2021-11-23 Ncs Multistage Inc. Casing float tool
US11697968B2 (en) 2013-02-05 2023-07-11 Ncs Multistage Inc. Casing float tool
US10883314B2 (en) 2013-02-05 2021-01-05 Ncs Multistage Inc. Casing float tool
US10883315B2 (en) 2013-02-05 2021-01-05 Ncs Multistage Inc. Casing float tool
US20180156002A1 (en) * 2015-06-01 2018-06-07 Tco As Destruction Mechanism for a Dissolvable Sealing Device
US10655413B2 (en) * 2015-06-01 2020-05-19 Tco As Destruction mechanism for a dissolvable sealing device
US11680462B2 (en) * 2017-10-25 2023-06-20 SBS Technology AS Well tool device with a breakable ball seat
US11499394B2 (en) * 2017-10-25 2022-11-15 SBS Technology AS Well tool device with a breakable ball seat
US11162325B2 (en) * 2017-10-25 2021-11-02 SBS Technology AS Well tool device with a breakable ball seat
US20220356780A1 (en) * 2018-04-25 2022-11-10 Interwell Norway As Well tool device for opening and closing a fluid bore in a well
US11692414B2 (en) * 2018-04-25 2023-07-04 Interwell Norway As Well tool device for opening and closing a fluid bore in a well
US10883333B2 (en) 2018-05-17 2021-01-05 Weatherford Technology Holdings, Llc Buoyant system for installing a casing string
US10808490B2 (en) 2018-05-17 2020-10-20 Weatherford Technology Holdings, Llc Buoyant system for installing a casing string
EP3575545A1 (en) * 2018-05-31 2019-12-04 National Oilwell Varco Norway AS Assembly for use in a wellbore, and related method
US10927642B2 (en) * 2018-06-26 2021-02-23 SBS Technology AS Device and method for setting of packing
US20200095844A1 (en) * 2018-06-26 2020-03-26 SBS Technology AS Device and Method for Setting of Packing
US11459846B2 (en) * 2019-08-14 2022-10-04 Terves, Llc Temporary well isolation device
US20220372832A1 (en) * 2019-08-14 2022-11-24 Terves, Llc Temporary well isolation device
US11739606B2 (en) * 2019-08-14 2023-08-29 Terves, Llc Temporary well isolation device
US20210238942A1 (en) * 2019-12-17 2021-08-05 Klx Energy Services Llc Degradable in-line buoyant system for running casing in a wellbore
US11639641B2 (en) * 2019-12-17 2023-05-02 Klx Energy Services, Llc Degradable in-line buoyant system for running casing in a wellbore
CN115142811A (zh) * 2022-06-23 2022-10-04 中国石油天然气集团有限公司 一种非旋转式可重复坐封封隔器以及其坐封、解封方法
US11988067B1 (en) * 2023-01-27 2024-05-21 Baker Hughes Oilfield Operations Llc Frangible disk sub, method and system
WO2025259116A1 (en) * 2024-06-14 2025-12-18 SBS Technology AS A method and a well device for temporary well isolation during a well completion phase

Also Published As

Publication number Publication date
GB2527462A (en) 2015-12-23
NO20130400A1 (no) 2014-09-19
NO339770B1 (en) 2017-01-30
GB201518292D0 (en) 2015-12-02
WO2014148914A3 (en) 2015-05-07
NO337760B1 (no) 2016-06-13
WO2014148914A2 (en) 2014-09-25
GB2527462B (en) 2019-10-09
NO20151219A1 (no) 2015-09-17

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