MX2015001608A

MX2015001608A - Downhole turbine-driven system.

Info

Publication number: MX2015001608A
Application number: MX2015001608A
Authority: MX
Inventors: Jørgen Hallundbæk; Lars Mangal; Ricardo Reves Vasques
Original assignee: Welltec As
Priority date: 2012-08-10
Filing date: 2013-08-09
Publication date: 2015-05-07
Also published as: WO2014023829A1; EP2882927A1; CN104541018A; US20150218900A1; EP2696026A1; RU2015107658A; CA2881336A1; AU2013301466A1; BR112015002298A2

Abstract

The present invention relates to a downhole system for performing an operation in a well downhole. The system comprises an elongated tubing string (3) for conducting fluid in the well; a turbine (7) driven by the fluid for driving a shaft (8); a generator (9) driven by the turbine by means of the shaft, a fluid-driven driving section (5) comprising a pump (6) driven by the fluid supplied through the shaft for propelling the fluid-driven driving section and the tubing string forward in the well, and an electrically driven driving section (10) comprising an electrical motor(ll) powered by the generator (9) for propelling the driving section and the tubing string forward in the well, wherein the fluid-driven driving section (5) is arranged between the generator (9) and the electrically driven driving section (10).

Description

TURBINE DRILLED DRILL BACKGROUND SYSTEM FIELD OF THE INVENTION The present invention relates to a bottomhole system for performing an operation at the bottom of a well bore, comprising an elongated pipe column for conducting fluid into the wellbore.

TECHNICAL BACKGROUND Hydrocarbon wells often have more than one branch or side that is derived from the main borehole. The sides can also have sides and be of various lengths. When a hole having a long side is completed, the hole is treated with acid to make the fluid containing hydrocarbons flow and start production. In order to perform an acid treatment on one side, the coiled tubing is pushed down through the hole or hole in the side. However, when the coiled tubing is pushed down from the surface, it tends to curl as it moves within the side which is more horizontal than the main bore, and at some point the coiled tubing becomes clogged on the side. Therefore the 52-1093-15 The laterals are not made so long because in reality it is impossible to pierce them, because the acid and the subsequent service equipment are not able to enter the last part of said long sides, because the known equipment can not enter the sides that have a small diameter.

SUMMARY OF THE INVENTION An object of the present invention is to overcome completely or partially said disadvantages and drawbacks of the previous technique. More specifically, one object is to provide an improved drilling bottom system capable of servicing a long side with a pipe column.

The above objects, together with various other objects, advantages and features, which will become apparent from the following description, are achieved by a solution in accordance with the present invention by means of a bottom-hole system for performing an operation at the bottom of the well drilling, which includes: - a column of elongated pipe to conduct fluid in the well, a turbine driven by the fluid to drive an axis, 52-1093-15 - a generator driven by the turbine via the shaft, and - a fluid-driven drive section comprising a pump driven by the fluid supplied through the shaft to propel the fluid-driven drive section and advance the pipe column into the well, wherein the system additionally comprises an electrically driven drive section comprising an electric motor driven by the generator to propel the drive section and advance the pipe column into the well, the fluid driven drive section being disposed between the generator and the drive section electrically driven.

In one embodiment, the pump can be driven by the turbine shaft.

Additionally, the elongated pipe column may be a coiled pipe.

Additionally, the drive sections may have external diameters less than 17.8 cm (7 inches), preferably less than 15.2 cm (6 inches), and more preferably less than 12.7 cm (5 inches).

In addition, the pipe column can have a length of at least 5 km, preferably one 52-1093-15 length of at least 7 km, more preferably a length of at least 9 km, and even more preferably a length of at least 10 km.

Additionally, the generator and the electric motor can be electrically connected through an electrical connection that extends through the fluid-driven drive section.

Also, the fluid in the pipe column can be supplied to the pump in the fluid-driven drive section through a fluid channel extending through the turbine and generator.

In addition, a pressure control valve may be provided in the fluid channel to reduce the passage of fluid to the pump from the fluid-driven drive section.

Additionally, a flow diverting valve may be provided in the fluid channel to divert the fluid supplied to the channel to the turbine.

In addition, the drive section may comprise propulsion units that make contact with an inner surface of the well to propel the forward sections of the well forward.

Also, the propulsion units can be units not driven hydraulically and driven by the electric motor. 52-1093-15 Additionally, the propulsion units can be wheels that make contact with an internal surface of the well.

In one embodiment, each wheel can be arranged on a projecting wheel arm.

Further, the wheel arms of the fluid-driven drive section can project in a first direction from a section housing, and the wheel arms of the electrically driven drive section can be projected in a second direction substantially perpendicular to the first direction. .

Additionally, the electric motor can drive the wheels of the electrically driven drive section.

In addition, each propulsion unit of the electrically driven drive section may comprise an electric motor driven by the generator.

Additionally, the electrically driven drive section may comprise a pump driven by the electric motor to drive forward the electrically driven drive section in the wellbore.

The bottom system of the perforation may further comprise a second drive section 52-1093-15 driven electrically driven by the generator through an electrical connection in the other electrically driven drive section disposed closer to the pipe column.

In one embodiment, the electrically driven drive section disposed closer to the pipe column may comprise a pump for driving hydraulically driven propulsion units.

In addition, the second electrically driven drive section may comprise propulsion units that are non-hydraulically driven units.

In another embodiment, each propulsion unit of the second electrically driven drive section may comprise an electric motor driven by the generator.

Additionally, the electrically driven drive section may comprise a rechargeable battery.

The bottom of the bore system may further comprise a flow diverter for diverting at least part of the fluid from the pipe column into the well.

In this way it is possible to perform the 52-1093-15 acid treatment of the well after the pipe column has been fully introduced into the very long side by pulling a pump to pump an acid composition into the pipe column from the surface.

In one embodiment, the flow diverter may be arranged in a dispersion unit for the dispersion of fluids, such as chemical reagents in the well.

Chemical reagents can be a fluid that contains acids or bases.

The bottom system of the perforation may further comprise an inflation unit to protect the delivery section while a stimulation operation is being performed or the well is treated with a fluid containing acids or bases.

Additionally, the bottom system of the perforation may comprise a detachment unit for detaching the discharge section from the pipe column.

In one embodiment, the detachment unit may be comprised in the dispersion unit.

Additionally, the bottom system of the perforation may comprise several electrically driven drive sections, all driven by the generator. 52-1093-15 In addition, the bottom system of the borehole may comprise several booster generators along the shaft.

Finally, the present invention relates to a stimulation method for performing a long-sided acid treatment by means of the bottom system of the perforation described above, comprising the steps of: - connect the turbine to the pipe column, - connect the generator to the turbine, - connecting the fluid-driven drive section with the turbine, - connecting the electrically driven drive section with the fluid-driven drive section in such a way that electricity is drawn from the generator to the electrically driven drive section, - supply pressurized fluid inside the pipe column, - pull the pipe column into the side by means of the drive sections, and - supplying fluid having an acid concentration within the pipe column to an outlet in the bottom system of the borehole to treat the side with acid. 52-1093-15 BRIEF DESCRIPTION OF THE DRAWINGS The invention and its many advantages will be described in more detail below with reference to the attached schematic drawings, which for the purpose of illustration show some non-limiting modalities, and in which: Figure 1 shows a bottom system of the perforation according to the present invention, Figure 2 shows a side view of a bottom system of the perforation according to the present invention, Figure 3 shows a side view of another system of the bottom of the perforation according to the present invention, Figure 4 shows a side view of the bottom system of the perforation according to Figure 1, Figure 5 shows a side view of another embodiment of the drilling bottom system, Figure 6 shows a cross-sectional view of the fluid-driven drive section shown in Figure 4, Figure 7 shows a side view of another system of the bottom of the hole, Figure 8 shows a side view of still 52-1093-15 another drilling bottom system, Figure 9 shows a side view of yet another system of the bottom of the perforation in its deflated position, and Figure 10 shows the bottom system of the perforation in its inflated and detached position.

All figures are quite schematic and are not necessarily to scale, and show only those parts that are necessary in order to explain the invention, omitting other parts or simply suggesting.

DETAILED DESCRIPTION OF THE INVENTION Figure 1 shows a hydrocarbon well 2 having sides that are derived from a main hole 12. On one of the long sides 13, a pipe 3 column, also known as coiled pipe, is being pulled into the more horizontal part of the side 13 by means of two driving sections 5, 10, with a fluid-driven driving section 5 and an electrically driven driving section 10. The driving sections 5, 10 propel themselves and propel the pipe column inside a tubing 15 on the side. The drive sections 5, 10 are connected to the 52-1093-15 end 14 of the pipe column which is furthest from a well head 30 in the upper part of the well on the surface or seabed. When entering long sides by pushing the pipe column into the well, the pipe column will bend at some point, also known as the "suspension point of the coiled pipe," which causes the column to get stuck. By arranging the drive sections in front of the pipe column, the end of the pipe column is pushed forward, preventing the column from bending and becoming stuck, and thus the pipe column is pulled further into the side more beyond the point of suspension.

Today, the sides are made in such a length that the operation and service team is able to operate and provide service along the entire length of the side. Once the operation team is able to enter more into the ground, the hole and sides can be made longer. The sides are made with a diameter substantially smaller than the main hole, which limits the diameter of the equipment and service tools and therefore the types of equipment and tools capable of entering even the final and smallest part of a lateral long. Before a well is capable of producing, it will undergo treatment with 52-1093-15 acid. In order to treat with acid even a final part of the side, i.e. the part that is furthest away from the main hole, the pipe column supplying the acid needs to be pulled almost completely to the end of the side. If this is not done, the pipe column will bend, which will make acid treatment of the entire side impossible and thus prevent it from producing hydrocarbons. Pulling tools that are capable of pulling the pipe on the narrow and long sides therefore needs to have its own power source because they can not feed sufficiently through the steel line from the surface.

Therefore, between the discharge sections 5, 10 and the pipe column 3, a turbine 7 is connected to the pipe column and is driven by high pressure fluid through the pipe column from the top of the well . The turbine 7 drives a generator 9 which supplies power through the fluid-driven driving section 5 to the electrically driven driving section 10. When the driving sections enter the end or the end part of the side, the diameter of the side is quite reduced, which means that the diameter of the impulse sections need to be equally small. 52-1093-15 Therefore, there is no space in the first fluid-driven drive section to supply fluid to a second drive section, and therefore the second drive section needs to be driven electrically, because electricity can be conducted through the motor. fluid-driven driving section to the next electrically driven driving section 10.

The electrically driven drive section 10 comprises drive units 18 in the form of wheels, and each wheel comprises an electric motor for turning the wheel and propelling the drive unit and advancing the pipe column in the well. Therefore, the electrically driven drive section comprises hydraulically driven drive units that are driven directly by the generator 9 through a control pack 25. The bottom system of the bore may comprise several electrically driven drive sections arranged successively and all driven by the generator as shown in figures 9 and 10.

The propulsion units 18 of the electrically driven driving section 10 can also be rotary units 36 around which a rail 37 is arranged as shown in Figure 3. 52-1093-15 A rotary unit 18 per lane comprises an electric motor 11 which drives the rail 37 or belt and therefore propels forward the drive section in the well.

As shown in Figure 4, the fluid-driven drive section 5 comprises a pump 6. The pump 6 is driven either by the rotational shaft of the turbine or by means of the fluid that is supplied to the pump through a fluid channel 16 which penetrates the turbine 7 and the generator 9. The electrically driven driving section 10 comprises the electric motor 11 energized by the generator to provide a propulsive movement of the electrically driven drive section 10. The propulsion units of the second drive section are driven by the motor 11 disposed between the drive sections, said motor drives a pump that drives a separate internal hydraulic system that drives the hydraulic motors on each wheel of the second drive section 10.

In Figure 4, part of the high pressure fluid drives the turbine 7 and therefore the generator 9, and the generator supplies power to the motor of the electrically driven driving section 10, and part of the fluid drives the pump 6 of the section Drive-driven 52-1093-15 by fluid 5. The fluid in the pipe column 3 therefore energizes the section or drive sections when the pipe column is pulled into the long side 13 (as shown in Figure 1) by the drive sections. self-propelled In this manner, the fluid in the pipe column is used to drive the pipe column forward on the side, and the fluid in the pipe column is used simultaneously and / or subsequently to perform an operation. The pipe column is therefore capable of entering even long and narrow laterals such as laterals longer than 2 km and having an internal diameter of the casing or bore less than 17.8 cm (7 inches).

In order to propel the discharge sections and the pipe column forward or backward into the well, the delivery sections comprise propulsion units 18, such as wheels 39, for contacting the inner surface of the tubing or bore in the well, as shown in Figures 2, 4-5 and 7-10. The wheels 39 are arranged on projecting wheel arms 19 projecting from a housing 20 of the drive sections 5, 10.

In Figure 5, the wheel arms of the fluid-driven drive section project into 52-1093-15 a first direction 21 from a section housing, and the wheel arms of the electrically driven driving section project in a second direction 22 substantially perpendicular to the first direction. The wheels are pressed to make contact with the inner face of the casing or the bore by means of the projecting wheel arms to propel the forward drive sections in the well.

The wheels of the fluid-driven drive section are rotated because each wheel comprises a hydraulic motor 23. All of the hydraulic motors 23 of the fluid-driven drive section 5 are driven by the pump 6.

The wheels of the electrically driven drive section shown in Figure 5 are also driven by a pump 24 included in the electrically driven drive section, which pump is driven by the electric motor and drives the hydraulic motors 23 on each wheel 39.

In Figures 2 and 7, each of the wheels 39 of the electrically driven driving section 10 comprises the electric motor 11 energized by the generator 9. As shown in Figure 7, the electrically driven driving section 10 may comprise a control pack 25 and a rechargeable battery 26. The 52-1093-15 rechargeable battery 26 can be charged when the pipe column is pushed into the first part of the well where there is no risk of the pipe column bending and clogging, and when the pipe column enters the last part of the well, the electrically driven drive section 10 is activated to pull the end of the pipe column into the side.

The generator 9 generates electricity to energize the electric motor disposed in the electrically driven drive section. The generator and the electric motor are electrically connected through an electrical connection 17 which extends through the fluid-driven drive section 5, as shown in Figure 6.

In Figure 4, a pressure control valve 28 is disposed in the fluid channel 16 to reduce the passage of fluid to the pump from the fluid-driven drive section. In this way, the pressure of the pressurized fluid does not need to be controlled so precisely from the surface to avoid damaging the components of the pump. If the fluid pressure is too high and in order to prevent damage to the components of the turbine and the generator, a flow diverter 29 is arranged in connection with the turbine to divert at least part of the fluid supplied to the turbine. 52-1093-15 turbine through an outlet 33 and into the well surrounding the drilling bottom system, as shown in Figure 5.

As shown in Figure 7, a flow diverter valve 31 is disposed in the fluid channel to divert the fluid supplied to the channel to the turbine, and therefore, if the fluid pressure in the channel is very high, it is It will allow the passage of more fluid through the turbine.

When the pipe column 3 has been pulled completely into the long side and the acid operation is to be performed, the fluid having a high concentration of acid is supplied through the pipe column. When performing this type of operation, the bottom system of the borehole may comprise a flow diverter 29, as shown in Figure 5, to divert at least part of the fluid from the pipe column into the wellbore. eliminate the need to detach the impulse sections to let the fluid out of the pipe to perform acid treatment or acid stimulation of the well. The flow diverter 29 is arranged in a dispersion unit 32 for the dispersion of a chemical reagent, such as an acid, in the well which is supplied to the chemical dispersion unit at 52-1093-15 through the pipe column 3.

In Figure 2, the dispersion unit 32 comprises a ball seat 40 which is activated by dropping a ball 41 into the pipe column to move the seat and allow the passage of the fluid to the outlets 33. The ball in the Ball seat closes the passage of fluid to the turbine.

A bottomhole system comprising both a fluid-driven drive section and an electrically driven drive section is shown in Figure 7. This bottomhole system further comprises an operational tool disposed in front of the drive section. drive and furthest from the pipe column. When the pipe column has been pulled to a certain position in the well, the enormous amount of energy in the pressurized fluid in the pipe column can be used to generate power through the turbine and generator to drive the operational tool.

The operational tool 38 shown in Figures 2 and 7 can be any type of tool, such as an adjustment tool, a release tool, a percussion tool, a key tool or a registration tool, etc. Due to the enormous amount of energy in the pressurized fluid in the 52-1093-15 pipe column, the logging tool can operate when the pipe column is pulled into the well without decreasing the propulsion velocity of the drive sections.

The bottom system of the perforation shown in Figure 9 comprises an inflation unit 35. The inflation unit 35 is inflated to protect the delivery section while performing a stimulation operation, such as the treatment of the well with a fluid containing acid or base. The inflation unit 35 can be any type of inflatable obturator by means of high pressure fluid. The inflation unit 35 is inflated, for example, by dropping a ball of a certain size into the fluid to move the ball seat from a position where the fluid is allowed to pass the turbine to a second position where it is left that the fluid enters the inflation unit. After inflating the inflation unit, a second larger ball is dropped, which moves the ball seat to a third position where the fluid is allowed to enter the well.

The bottom system of the perforation may further comprise a detachment unit 43 disposed within the dispersion unit 32 to detach the discharge sections from the column of 52-1093-15 pipe, as shown in Figure 9. Each drive section comprises a battery 26 and a control pack 25 in such a way that when the discharge sections are detached from the pipe column and when for example the treatment has been carried out with acid, the impulse sections are capable of propelling themselves out of the well.

The detachment of the pipe column can take place when the second ball is dropped and the ball seat moves to a second position where the pipe column is detached from the driving section, thereby allowing fluid to enter In the well.

When the inflation unit has been inflated and the delivery sections have been detached from the pipe column, as shown in Figure 10, the pipe column can be pulled back, and the stimulation operation can be initiated, such as the acid treatment.

Instead of having an inflation unit 35, the detached pipe column can be pulled further back to avoid damaging the discharge sections while, for example, the acid treatment is carried out.

Timers can be used to deflate the 52-1093-15 inflation unit and activate the drive section to propel itself out of the well.

The electric motor of the electrically driven drive section can also drive a gear system that drives the propulsion units 18 or belts, and therefore an electric motor is capable of driving several propulsion units or even all the propulsion units .

When the bottom system of the bore comprises a second electrically driven drive section, this electrically driven drive section is driven by the generator through an electrical connection 17 in the other electrically driven drive section disposed closer to the boom column. pipeline. In this manner, a large number of electrically driven drive sections can be mounted on the pipe column to pull the pipe column further into the well.

In another embodiment, the electrically driven drive section disposed closer to the pipe column may comprise a pump for driving hydraulically driven propulsion units each comprising a hydraulic motor 23.

Therefore, a driven impulse section 52-1093-15 electrically energized ppoorr the generator can comprise electric motors in each wheel or hydraulic motors in each wheel, the hydraulic motors being driven by a pump driven by the electricity of the generator.

In the case where two drive sections, such as a fluid-driven drive section and an electrically driven drive section, are not able to pull the entire pipe column on the side, the bottom system of the borehole it may comprise several electrically driven drive sections all energized by the generator, as shown in Figure 8. The bottom system of the borehole may also comprise several booster generators by the output shaft 8 of the turbine in order to gain more energy to pull the pipe column.

In order to perform acid treatment or other fluid stimulation, such as scale removal operations, from the side of the well, the bottom system of the drill is assembled by connecting the turbine to the pipe column and connecting the generator with the turbine in such a way that the generator is driven by the output shaft 8. Then, the fluid-driven drive section is 52-1093-15 connects to the turbine in such a way that the fluid channel 16 is connected to the pump 6 of the fluid-driven drive section, and the electrically driven drive section is then connected to the fluid-driven drive section in such a way that electricity is conducted from the generator through the fluid-driven drive section to the electrically driven drive section. The pressurized fluid is supplied inside the pipe column to the turbine and the fluid channel. In this way, the pipe column is pulled directly into the side by the fluid-driven drive section by means of the pressurized fluid and by the drive section electrically driven by means of the turbine., the generator and the electric motor. When the pipe column is positioned to perform the acid treatment or other stimulation operation, a fluid having a particular composition, for example an acid or base concentration, or a fluid comprising enzymes, is supplied through the column of pipe to an outlet 33 in the system of the bottom of the hole to treat the side with acid.

The bottom system of the perforation may comprise a dispersion unit 32 for dispersion of the fluid, such as an acid or a base, within the 52-1093-15 side. The dispersion unit may also comprise angled valves such that the unit is rotated when the pressurized fluid containing acid enters through the valves.

Drive sections capable of containing long sides may have an outer diameter less than 12.7 cm (5 inches) and more preferably less than 10.2 cm (4 inches). By long sides are meant laterals, branches or side rails having a length of at least 4 km, more preferably a length of at least 5 km, and more preferably a length of at least 7 km.

By fluid or well fluid it is understood that it is any type of fluid that may be present at the bottom of the drilling of oil or gas wells, such as natural gas, oil, oil sludge, crude oil, water, or a composition chemical, such as an acid composition. Gas is understood to be any type of gas composition present in a well, a termination, or an open hole, and by petroleum it is understood that it is any type of petroleum composition, such as crude oil, a fluid containing oil, etc. Therefore, gas, oil, and water fluids may comprise other elements or substances other than gas, ppeettrróólleeoo ,, and / or water, 52-1093-15 respectively.

By tubing it is understood that it is any type of pipe, pipe, tubular, lining, cn, etc., used in the bottom of the borehole in relation to the production of oil or natural gas.

The drive sections can be a bottom drilling tractor or any type of drive tool capable of pushing or pulling tools at the bottom of a well bore, such as a Well Tractor®.

Although the invention has been described above in connection with preferred embodiments of the invention, it will be apparent to a person skilled in the art that various modifications are conceivable without departing from the invention as defined by the following claims. 52-1093-15

Claims

1. A system of the bottom of the hole (1) for performing an operation on a bottom of the hole of a hole (2) comprising: an elongated pipe column (3) to conduct fluid (4) in the well, - a turbine (7) driven by the fluid to drive an axis (8), - a generator (9) driven by the turbine by means of the shaft, and - a fluid-driven drive section (5) comprising a pump (6) driven by the fluid supplied through the shaft to propel the fluid-driven drive section and advance the pipe column into the well, wherein the system additionally comprises an electrically driven driving section (10) comprising an electric motor (11) driven by the generator to propel the driving section and advance the pipe column into the well, the driven driving section being provided by fluid between the generator and the electrically driven drive section.

2. A bottom system of the perforation according to claim 1, wherein the generator and the 52-1093-15 electric motor are electrically connected through an electrical connection (17) that extends through the fluid-driven drive section.

3. A bottomhole system according to claim 1 or 2, wherein the fluid from the pipe column can be supplied to the pump of the fluid-driven drive section through a fluid channel (16) extending to through the turbine and the generator.

4. A bottom system of the borehole according to any of the preceding claims, wherein the drive section comprises propulsion units (18) that make contact with an internal surface (27) of the well to propel the forward sections in the wellbore. .

5. A bottom system of the borehole according to claim 4, wherein the propulsion units are units not driven hydraulically and driven by the electric motor.

6. A bottom system of the borehole according to claim 4 or 5, wherein the propulsion units (39) make contact with an internal surface (27) of the well.

7. A bottom system of the perforation according to claim 6, wherein each wheel is 52-1093-15 arranged on a projecting wheel arm (19).

8. A bottomhole system according to any of claims 4-7, wherein each propulsion unit of the electrically driven drive section comprises an electric motor (11) driven by the generator.

9. A bottomhole system according to any one of the preceding claims, wherein the electrically driven drive section comprises a pump (24) driven by the electric motor to drive the electrically driven drive section forward in the wellbore.

10. A bottom system of the perforation according to any of the preceding claims, wherein the electrically driven driving section comprises a rechargeable battery (26).

11. A bottom system of the perforation according to any of the preceding claims, wherein additionally comprises a flow diverter (29) for diverting at least part of the fluid from the pipe column into the well.

12. A bottom system of the perforation according to claim 11, wherein the flow diverter is arranged in a dispersion unit for the dispersion of fluids, such as chemical reagents in 52-1093-15 the hole.

13. A bottom system of the perforation according to any of the preceding claims, wherein additionally comprises an inflation unit (35) for protecting the discharge section while performing a stimulation operation or the well is treated with a fluid containing acids or bases.

14. A bottom system of the perforation according to any of the preceding claims, wherein additionally comprises a detachment unit for detaching the discharge section of the pipe column. 52-1093-15