Horizontal well segmented uniform steam injection and oil production integrated device and method

Abstract

The invention belongs to the technical field of oil well oil extraction processes, and discloses a horizontal well segmented uniform steam injection and oil extraction integrated device and method.The device comprises an upper center pipe and a lower center pipe, a steel belt is attached to a sleeve to be sealed, a setting locking mechanism and a thrust cylinder sleeve are arranged in the upper center pipe, and the thrust cylinder sleeve moves upwards after being pressed; the split type triangular expansion ring and the split type rectangular expansion ring are pushed to operate and expand outwards, the lower center pipe is provided with a nozzle seat, and the nozzle seat is provided with a steam control nozzle. Steam can be uniformly injected into each layer section of an oil well, fingering of each layer section is controlled, meanwhile, the nozzle also controls uniform output of each layer section, and the development effect of the oil well is improved.

Description

Technical Field

[0001] This invention belongs to the field of oil well production technology. It relates to an integrated device and method for horizontal well segmented uniform steam injection oil production. Background Technology

[0002] Heavy oil horizontal well steam injection technology has become a routine production enhancement measure for oilfields. The main technologies are as follows: one is general steam injection technology; the other is multi-point steam injection technology. However, the steam injection effect of both technologies is not ideal.

[0003] Uneven steam intake is a common problem in long horizontal well sections. Significant steam losses occur during steam travel, making it difficult to control steam propagation along high-permeability layers and impacting block development.

[0004] CN113250647A discloses a suspended well completion integrated packer and completion string. The suspended well completion integrated packer includes a coaxially connected setting mechanism, a reconnection sleeve, a release mechanism, and a setting / hanging mechanism. The setting mechanism includes a setting center tube, a setting assembly, a first setting cylinder liner, and a first annular setting piston. The setting / hanging mechanism includes a setting center tube, a thrust sleeve, a starting shear fixing component, and a setting / hanging sealing assembly. The release mechanism includes a release spring lock tube, a release lock head, a release shear fixing component, and a release assembly. The suspended well completion integrated packer may also include a reconnection mechanism, which includes a reconnection lock sleeve and a reconnection insertion tube assembly. The suspended packer setting mechanism of this disclosure can achieve independent setting, ensuring that the function of other tools within the open-hole segmented completion string is not affected. Furthermore, the release mechanism has high compressive strength and can be released after setting / hanging. However, this technical solution cannot achieve uniform steam injection. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention provides an integrated device and method for segmented uniform steam injection and oil production in horizontal wells. This technology enables manual segmented control of downhole steam flow. Through tubing or insulated tubing, the horizontal sections are segmented in multiple stages according to design requirements to achieve uniform steam injection. This technology includes an integrated packer, allowing tools to be retrieved without getting stuck, improving the production profile and increasing well output.

[0006] This invention utilizes a steam injection oil recovery tool design to achieve simultaneous and uniform steam injection, uniform advancement, and uniform development across all sections. The technology incorporates an integrated super-expansion packer, and through a special design of the steam injection nozzle, the flow velocity at the nozzle throat is controlled to remain constant, ensuring the injection flow rate is unaffected by injection pressure. A sudden pressure drop at the secondary nozzle causes flash evaporation, increasing steam dryness. Therefore, the steam injection rate remains constant in high-permeability zones and increases in low-permeability zones, achieving effective and uniform steam injection across all sections.

[0007] The above-mentioned objective of this invention is achieved through the following technical solution:

[0008] A horizontal well segmented uniform steam injection oil production integrated device includes an upper central pipe and a lower central pipe, with a steel strip sealing the casing. The upper central pipe is equipped with a seat sealing mechanism and a thrust cylinder liner. After being pressurized, the thrust cylinder liner moves upward, pushing the split triangular expansion ring and the split rectangular expansion ring to expand outward. The lower central pipe is equipped with a nozzle seat, and the nozzle seat is equipped with a steam control nozzle.

[0009] Furthermore, the setting and locking mechanism includes: a setting cylinder liner engaging with an elastic locking ring; a setting and locking sleeve fixed to a bridge-type releasing center sleeve via a releasing pin; and a pin fixing sleeve fixed to a setting pin via a setting pin.

[0010] Furthermore, the split triangular expansion ring and the split rectangular expansion ring are locked by a locking ball.

[0011] Furthermore, the expansion center tube helps the split expansion blocks A, B, and C slide upwards and expand outwards, pressing against the steel strip and sealing the sleeve.

[0012] Furthermore, locking springs are provided on the outside of the split expansion block A, split expansion block B, and split expansion block C.

[0013] Furthermore, the steam control nozzles can be selected in any combination of 1 to 4.

[0014] Furthermore, the cylinder liner is designed with serrated grooves.

[0015] Furthermore, the seat seal sleeve is designed with an elastic locking ring groove, in which an elastic locking ring is placed to engage with the serrated groove of the seat seal cylinder liner.

[0016] Furthermore, a steel strip sheath is provided on the outside of the steel strip.

[0017] Furthermore, the lower center tube is also equipped with a steel strip locking mechanism: after the steel strip is fixed, tighten the locking sleeve to press the steel strip, tighten the locking threaded sleeve on the steel strip to press against the pressure ring to prevent the steel strip from falling off, and after the steel strip is placed and shaped, press the upper steel strip pressure sleeve.

[0018] Furthermore, the lower central pipe is also equipped with a steam injection channel locking mechanism: the sliding cylinder liner is designed with a locking block locking groove, and the sliding cylinder liner is connected to the steam inlet sliding sleeve through the locking block.

[0019] Furthermore, the sliding cylinder liner is connected to the steam inlet sleeve, and the steam inlet sleeve is connected with a release pin, and the steam inlet sleeve return spring is in contact with the steam inlet sleeve.

[0020] Furthermore, the upper center tube and the lower center tube are connected by a center connecting cylinder sleeve, and a steel strip return spring is provided between the center connecting cylinder sleeve and the lower steel strip clamping ring.

[0021] Furthermore, the connection between the bridge-type release center sleeve and the center connecting cylinder liner is strengthened and stabilized by locking pins.

[0022] Furthermore, a sealing ring is provided between the upper center tube and the thrust cylinder liner.

[0023] Furthermore, a top sealing ring is provided between the bridge-type unsealing center sleeve and the bridge-type unsealing center sleeve.

[0024] A method for integrated horizontal well segmented uniform steam injection and oil production, including the following steps after steam injection and tubing string extraction:

[0025] (1) Assemble the downhole tools in the order of steam packer + integrated steam control device + integrated steam control device + ... + tailpipe and lower them to the predetermined position;

[0026] (2) When the pump truck pressurizes, the thrust cylinder liner moves upward and drives the setting cylinder liner to shear the setting pin. The thrust cylinder liner moves upward against the split triangular expansion ring and the split rectangular expansion ring. Under the action of the expansion center tube, it slowly and evenly expands outward and adheres to the casing wall against the overlapping steel strips around the circumference. The sawtooth teeth on the inner wall of the setting cylinder liner bite into the popped elastic locking ring, so that the thrust cylinder liner no longer retracts. The packer sets and the internal split triangular expansion ring and split rectangular expansion ring are installed in a staggered manner and squeezed together to seal.

[0027] (3) While the pump truck pressurizes the packer to set the seal, the sliding cylinder liner moves upward to compress the spring. After being blocked, the steam inlet slide sleeve moves downward under pressure. The steam inlet slide sleeve release pin is sheared and continues downward. The locking block pops out under the action of the wave spring and pushes into the groove inside the steam inlet slide sleeve, connecting the steam inlet slide sleeve with the sliding cylinder liner.

[0028] (4) Stop pressurizing. The packer has been set. The steam inlet sleeve moves downward under the action of the compression spring. After it reaches the top ring, the steam injection hole on the lower central tube corresponds to the steam injection hole on the steam inlet sleeve, and the steam injection channel is opened.

[0029] (5) Steam injection;

[0030] (6) After steam injection and well sealing, the tubing string is pulled up, the unsealing pin is sheared off, the locking sleeve of the setter is unlocked and can slide, the sawtooth teeth on the inner wall of the setter cylinder sleeve lose their engagement with the popped elastic locking ring, the steel strip is forcibly pulled back to its original position, the packer is unsealed, and the tubing string in the well is pulled out of the wellhead.

[0031] (7) Lower the oil pump to extract oil.

[0032] Oil extraction after loss of control includes the following steps:

[0033] Steps (1)-(5) are the same as above;

[0034] (6) After steam injection and well sealing, the pump truck pressurizes the well, the packer is released, the packer and the steam injection tools below it are left in the well, and the tubing is pulled out of the wellhead.

[0035] (7) Oil extraction using the down-source pump.

[0036] The advantages of this invention compared to the prior art are:

[0037] This invention enables uniform steam injection into each layer of an oil well, controls fingering phenomena in each layer, and simultaneously controls uniform production in each layer through the nozzle, thereby improving the development effect of the oil well. Attached Figure Description

[0038] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] Figure 1 This is a schematic diagram of the structure of the horizontal well segmented uniform steam injection and oil production integrated device of the present invention;

[0040] Figure 2 This is a schematic diagram of the front half of the integrated device;

[0041] Figure 3 This is a schematic diagram of the rear half of the integrated device;

[0042] Figure 4 yes Figure 1 Sectional view of AA;

[0043] Figure 5 This is a schematic diagram of non-uniform steam injection technology in the prior art;

[0044] Figure 6 This is a schematic diagram of uniform steam injection according to the present invention.

[0045] The components include: 1. Upper connector; 2. Locking sleeve; 3. Upper locking threaded sleeve of steel strip; 4. Upper steel strip compression sleeve; 5. Expansion center tube; 6. Upper center tube; 7. Split-type triangular expansion ring; 8. Split-type rectangular expansion ring; 9. Steel strip; 10. Thrust cylinder liner; 11. Bridge connector; 12. Setting cylinder liner; 13. Bridge-type unsetting center sleeve; 14. Setting and locking sleeve; 15. Elastic locking ring; 16. Pin fixing sleeve; 17. Center connecting cylinder liner; 18. Steel strip sleeve; 19. Lower steel strip compression ring; 20. Lower locking threaded sleeve of steel strip; 21. Connector; 22. Screen tube cylinder liner; 23. Sliding... 24. Cylinder liner; 25. Locking block; 26. Inlet sleeve; 27. Lower center tube; 28. Top ring; 29. ​​Control nozzle; 30. Nozzle seat; 31. Limiting sleeve; 32. Lower connector; 33. Locking ball; 34. Locking spring; 35. Steel strip return spring; 36. Inlet sleeve return spring; 37. Wave spring; 38. Unsealing pin; 39. Setting pin; 40. Locking pin; 41. Inlet sleeve unsealing pin; 42. Sliding limit pin; 43. Sealing ring; 44. Top sealing ring; 45. Sleeve; 46. Split expansion block A; Split expansion block B; Split expansion block C. Detailed Implementation

[0046] The present invention is described in detail below through specific embodiments, but this does not limit the scope of protection of the present invention. Unless otherwise specified, the experimental methods used in the present invention are all conventional methods, and the experimental equipment, materials, reagents, etc. used can all be obtained commercially.

[0047] Example 1

[0048] Features of this invention: It can achieve multi-stage uniform steam injection for oil production in horizontal wells, thereby improving development efficiency.

[0049] This invention controls the uniform steam injection and oil production in each section through a steam injection tool, ensuring that steam is injected uniformly into each section and is not affected by reservoir heterogeneity and pressure. During production, based on the principle that the pressure difference is small when producing fluid and the pressure difference increases instantaneously when steam appears (flash steaming), the steam is restricted from entering the wellbore, thus inhibiting steam channeling.

[0050] Each steam injection tool is designed with four steam control nozzles 28 of different sizes. Different combinations of these nozzles 28 are designed to address the steam injection volume within each section, such as two or three nozzles. There are 15 possible combinations of steam control nozzles 28 per section. Each steam control nozzle 28 is specially designed so that the steam velocity increases as the pipe diameter decreases, but once the injected steam velocity reaches a certain point, it stops increasing. At this point, regardless of the injection pressure, the injection flow rate remains constant. When each steam control nozzle 28 is constant, the injection volume in each section does not change, achieving uniform steam injection across all sections. During oil production, the steam control nozzles 28 also control the uniform production of each section.

[0051] The integrated tool also includes a packer, which is sealed by being compressed and expanded onto the casing wall using a very thin steel strip 9. An internal setting and locking mechanism is designed to make the packer more stable after setting. A forced release mechanism for lifting the tubing string is also designed to prevent the tubing string from getting stuck.

[0052] The entire structure is shown in the attached figure. Figure 1 As shown, where:

[0053] 1. Upper connector 1: Connects to the oil pipe.

[0054] 2. Locking sleeve 2: After the steel belt 9 is fixed, tighten it to press down the steel belt 9 to prevent it from falling off.

[0055] 3. Tighten the threaded sleeve 3 on the steel strip to hold the pressure ring in place and prevent the steel strip 9 from falling off.

[0056] 4. Pressing the steel belt 9: After the steel belt 9 is placed and shaped, press the steel belt 9 tightly.

[0057] 5. Assisting expansion center tube 5: Assists the split expansion blocks A45, B46, and C47 to slide upward and expand outward, pressing against the steel strip 9 and sealing the sleeve 44.

[0058] 6. Upper central pipe 6: Establish steam injection channel to connect various components.

[0059] 7. Split-type triangular expansion ring 7: When pressed upward, it expands outward evenly through the expansion center tube 5, presses against the steel strip 9 and seals the sleeve 44, and interacts with the split-type rectangular expansion ring 8 to form a linkage whole.

[0060] 8. Split rectangular expansion ring 8: When pressed upward, it expands outward evenly through the expansion center tube 5, presses against the steel strip 9 and seals the sleeve 44, and interacts with the split triangular expansion ring 7 to form a linkage whole.

[0061] 9. Steel strip 9: Like a rolled-up book, each page is stacked on top of each other. Under the force of the top, it slowly and evenly unfolds and expands outward, fitting the sleeve 44 for sealing. When it is lifted to unseal, the steel strip 9 can instantly press the split triangular expansion ring 7 and the split rectangular expansion ring 8 back into place.

[0062] 10. Thrust cylinder liner 10: After being pressurized, it moves upward, pushing the split triangular expansion ring 7 and the split rectangular expansion ring 8 to expand outward.

[0063] 11. Bridge-type connector 11: Establishes a fluid flow channel and is used for pressure setting.

[0064] 12. Setting cylinder liner 12: Pressurized upward movement shears the setting pin 38, which has a serrated groove inside. After the packer is set, it interacts with the elastic locking ring 15 to lock the packer and prevent it from being released.

[0065] 13. Bridge-type unsealing center sleeve 13: Establishes a fluid flow channel, the lifting of the tubing unsealing pin 37 is sheared, the seated locking sleeve 14 is released, and the packer is unsealed.

[0066] 14. Sealing and locking sleeve 14: It is fixed to the bridge-type unsealing center sleeve 13 by the setting pin 38. It is designed with an elastic locking ring groove, and an elastic locking ring 15 is placed inside. It engages with the serrated groove of the setting cylinder liner 12 to lock the packer in place. When the packer is lifted to unseal, the unsealing pin 37 is sheared, the setting and locking sleeve 14 loses its locking function, and the packer is unsealed.

[0067] 15. Elastic locking ring 15: It works with the serrated groove of the setting cylinder liner 12 to lock the packer in place.

[0068] 16. Pin fixing sleeve 16: Fixes the seat pin 38 at position.

[0069] 17. Center connecting cylinder liner 17: Connects to the lower center tube 26, providing support for the fixing and sliding of other lower steel strips.

[0070] 18. Steel strip sheath 18: Protects the steel strip 9 from free sliding and damage.

[0071] 19. Lower steel strip clamping ring 19: Used to clamp the steel strip 9.

[0072] 20. Steel strip lower locking threaded sleeve 20: Tighten to hold the pressure ring in place to prevent the steel strip 9 from falling off.

[0073] 21. Connector 21: Used for connecting the upper and lower parts.

[0074] 22. Screen tube cylinder liner 22: Establishes an annular fluid flow channel with slits for steam injection and oil production.

[0075] 23. Sliding cylinder liner 23: Forced sliding compression spring, with locking block 24 locking groove designed on it.

[0076] 24. Locking block 24: Locks the connection between the sliding cylinder liner 23 and the steam inlet sleeve 25.

[0077] 25. Steam inlet sleeve 25: Under pressure, the unsealing pin 37 of the steam inlet sleeve 25 is sheared off, the steam inlet sleeve 25 moves down, and the steam injection passage is opened.

[0078] 26. Lower central pipe 26: Establish steam injection channel to connect various components.

[0079] 27. Top ring 27: Limiting and anti-collision function.

[0080] 28. Steam control nozzle 28: With a special structural design, it can keep the steam injection rate constant regardless of the pressure difference after a certain pressure difference is exceeded. Four models of the four steam control nozzles 28 are designed, which can form 15 different combinations.

[0081] 29. Nozzle seat 29: Installs steam control nozzle 28, with 4 mounting holes.

[0082] 30. Limiting sleeve 30: Limits the nozzle seat 29 to ensure its stability.

[0083] 31. Lower connector 31: Connects to the oil pipe.

[0084] 32. Locking ball 32: Locks the split triangular expansion ring 7 and the split rectangular expansion ring 8 together after they are expanded under pressure, strengthens the seal and prevents displacement.

[0085] 33. Locking spring 33: To bring together the split expansion blocks A45, B46, and C47 in a circular shape to prevent them from spreading out.

[0086] 34. Steel strip return spring 34: When the packer is set, it is compressed, and when it is unsealed, it can pull the steel strip 9 to quickly return to its original position.

[0087] 35. Steam inlet sleeve return spring 35: After the unsealing pin 37 of the steam inlet sleeve 25 is cut off, the steam inlet sleeve return spring 35 can quickly push the steam inlet sleeve 25 downward, open the steam injection channel, and restrict the movement of the steam inlet sleeve return spring 35.

[0088] 36. Wave spring 36: Lifts the locking block into the slot for locking.

[0089] 37. Unsealing pin 37: The lifting tube string is sheared, and the packer is unsealed.

[0090] 38. Setting pin 38: Sheared during pressure testing, setting the packer.

[0091] 39. Locking pin 39: Strengthens and stabilizes the connection between the bridge-type unsealing center sleeve 13 and the center connecting cylinder liner 17.

[0092] 40. Unsealing pin 40 of the steam inlet sleeve: Pressurize and shear it to allow the steam inlet sleeve 25 to slide and open the steam injection channel.

[0093] 41. Sliding limit pin 41: restricts the air intake sleeve 25 to move only longitudinally.

[0094] 42. Sealing ring 42: Prevents leakage and failure.

[0095] 43. Top sealing ring 43: Prevents leakage between threads.

[0096] Example 2

[0097] First, divide the horizontal section of the horizontal well into segments of different lengths according to the surveyed steam intake profile, and determine the lowering position of the integrated steam control device.

[0098] Oil production is achieved by extracting the tubing after steam injection, as follows:

[0099] (1) Assemble the downhole tools in the order of steam injection packer + integrated steam control device + integrated steam control device + ... + tailpipe and lower them to the predetermined position. The equipment can be lowered into the horizontal section according to the required number of steam injection layers, such as 40 meters or 30 meters.

[0100] (2) When the pump truck pressurizes, the thrust cylinder liner 10 moves upward, causing the setting cylinder liner 12 to shear the setting pin 37. The thrust cylinder liner 10 will push against the split triangular expansion ring 7 and the split rectangular expansion ring 8 and move upward. Under the action of the expansion center tube 5, it slowly and evenly expands outward, pushing against the overlapping steel strip 9 around the circumference and adhering to the casing wall. The serrated teeth on the inner wall of the setting cylinder liner 12 engage with the popped elastic locking ring 15, preventing the thrust cylinder liner 10 from retracting and setting the packer. The internal split triangular expansion ring 7 and split rectangular expansion ring 8 are installed in a staggered manner and squeezed together to seal. The locking ball 31 makes the positions of the internal split triangular expansion ring 7 and split rectangular expansion ring 8 stable and prevents misalignment.

[0101] (3) While the pump truck pressurizes the packer to set, the sliding cylinder liner 23 moves upward to compress the spring 34. After being blocked, the steam inlet sleeve 25 moves downward under pressure. The steam inlet sleeve release pin 39 is sheared and continues to move downward. The locking block 24 pops out under the action of the wave spring 35 and pushes into the groove inside the steam inlet sleeve 25. The steam inlet sleeve 25 and the sliding cylinder liner 23 are connected together.

[0102] (4) Stop pressurizing. The packer has been set. The steam inlet sleeve 25 moves downward under the action of the compression spring 34. After it reaches the top ring 27, the steam injection hole on the lower central tube 26 corresponds to the steam injection hole on the steam inlet sleeve 25. The steam injection channel is opened. The sliding limit pin 40 plays the role of preventing rotation and controlling the direction.

[0103] (5) Steam injection: The integrated steam control device packer has been set. Steam is injected into the oil layer through the steam injection channel established by the lower central pipe 26 and the screen cylinder liner 22, the steam control constant flow rate nozzle and the slotted screen pipe. Under a certain pressure difference, the steam injection rate is constant. No matter how much the pressure in front of the steam control nozzle increases, the steam injection rate will not change. Due to the different steam injection volume design of each layer, the nozzle combination is also different. However, the steam injection rate of each layer is constant under a certain pressure difference. It will not be that some layers have a large injection volume due to high permeability. All layers are injected evenly.

[0104] (6) After steam injection and well sealing, the tubing string is pulled up, the unsealing pin 37 is sheared off, the locking sleeve 14 is unlocked and can slide, the sawtooth teeth on the inner wall of the setting cylinder sleeve 12 and the popped elastic locking ring 15 lose their engagement function, the steel strip 9 is forcibly pulled back to its original position, the packer is unsealed, and the tubing string in the well is pulled out of the wellhead.

[0105] (7) Lower the oil pump to extract oil.

[0106] Example 3

[0107] First, divide the horizontal section of the horizontal well into segments of different lengths according to the surveyed steam intake profile, and determine the lowering position of the integrated steam control device.

[0108] Oil extraction after loss of control is achieved as follows:

[0109] (1) Assemble the downhole tools in the order of high temperature release packer + integrated steam control device + integrated steam control device + ... + tailpipe and lower them to the predetermined position. The equipment can be lowered into the horizontal section according to the required number of steam injection layers, such as 40 meters or 30 meters.

[0110] (2) The steam injection process is the same as in Example 2.

[0111] (3) After steam injection and well sealing, the pump truck pressurizes the well to 20MPa, the packer is released, the packer and the steam injection tools below it are left in the well, and the tubing is pulled out of the wellhead.

[0112] (4) Oil production pump is installed. At this time, the downhole integrated device is in the set-off state. When producing oil, the liquid will flow into the tubing through the screen pipe, the steam control nozzle 28 and the steam injection channel. The steam control nozzle 28 plays the role of controlling each oil layer, so that each oil layer produces evenly and reduces the oil production interference between layers.

[0113] The embodiments described above are merely preferred embodiments of the present invention, and not all feasible embodiments of the present invention. Any obvious modifications made by those skilled in the art without departing from the principles and spirit of the present invention should be considered to be included within the scope of protection of the claims of the present invention.

Claims

1. A horizontal well segmented uniform steam injection and oil production integrated device, characterized in that, The upper central pipe (6) and the lower central pipe (26) are sealed by the steel belt (9) adhering to the sleeve (44), the inside of the upper central pipe (6) is provided with a setting locking mechanism and a thrust cylinder sleeve (10), the thrust cylinder sleeve (10) runs upward after being pressed, and pushes the split-apart triangular expansion ring (7) and the split-apart rectangular expansion ring (8) to run outward and expand, the lower central pipe (26) is provided with a nozzle seat (29), and the nozzle seat (29) is installed with a steam control nozzle (28).

2. The horizontal well staged uniform gas injection and oil production integrated device according to claim 1, characterized in that, The setting locking mechanism comprises a setting cylinder sleeve (12) and a elastic locking ring (15) clamped together, a setting locking sleeve (14) is fixed on the bridge-type unblocking central sleeve (13) through an unblocking pin (37), and the pin fixing sleeve (16) is fixed on the fixed setting pin (38) through a setting pin (38).

3. The horizontal well staged uniform gas injection and oil production integrated device according to claim 1, characterized in that, The split-apart triangular expansion ring (7) and the split-apart rectangular expansion ring (8) are locked through a locking ball (32).

4. The horizontal well staged uniform gas injection and oil production integrated device according to claim 1, characterized in that, The split-apart expansion block A (45), the split-apart expansion block B (46) and the split-apart expansion block C (47) are pushed to slide upward and then expand outward, and press against the steel belt (9) adhering to the sleeve (44).

5. The horizontal well staged uniform gas injection and oil production integrated device according to claim 4, characterized in that, The outside of the split-apart expansion block A (45), the split-apart expansion block B (46) and the split-apart expansion block C (47) is provided with a locking spring (33).

6. The horizontal well staged uniform gas injection and oil production integrated device of claim 1, wherein, The steam control nozzle (28) is used in an arbitrary number of combinations of 1-4.

7. The horizontal well staged uniform gas injection and oil production integrated device according to claim 2, characterized in that, The setting cylinder sleeve (12) is designed with a sawtooth groove.

8. The horizontal well segmented uniform gas injection and oil production integrated device according to claim 2, characterized in that, The setting locking sleeve (14) is designed with an elastic locking ring groove on the upper surface, and the elastic locking ring (15) is placed in the groove and clamped with the sawtooth groove of the setting cylinder sleeve (12).

9. The horizontal well staged uniform gas injection and oil production integrated device of claim 1, wherein, The outside of the steel belt (9) is provided with a steel belt sheath (18).

10. The horizontal well staged uniform gas injection and oil production integrated device of claim 1, wherein, The lower central pipe (26) is further provided with a steel belt locking mechanism: after the steel belt (9) is fixed, the locking sheath 2 is tightened to press the steel belt (9), the locking screw thread sleeve 3 is tightened to press the compression ring and prevent the steel belt (9) from falling off, and the steel belt (9) is placed and shaped after being compressed by the upper steel belt compression sleeve (4).

11. The integrated device for segmented uniform gas injection and oil production in horizontal wells according to claim 1, characterized in that, The lower central pipe (26) is further provided with a steam injection passage locking mechanism: the sliding cylinder sleeve (23) is designed with a locking block (24) locking groove on the upper surface, and the sliding cylinder sleeve (23) is connected with the steam inlet sliding sleeve (25) through the locking block (24).

12. The integrated device for segmented uniform gas injection and oil production in horizontal wells according to claim 11, characterized in that, The sliding cylinder sleeve (23) is connected with the steam inlet sliding sleeve (25), the steam inlet sliding sleeve (25) is connected with the unblocking pin (37), and the steam inlet sliding sleeve (25) is combined with the steam inlet sliding sleeve (25).

13. The integrated device for segmented uniform gas injection and oil production in horizontal wells according to claim 1, characterized in that, The upper central pipe (6) and the lower central pipe (26) are connected through a central connecting cylinder sleeve (17), and the central connecting cylinder sleeve (17) is provided with a steel belt reset spring (34) between the lower steel belt compression ring (19).

14. The integrated device for segmented uniform gas injection and oil production in horizontal wells according to claim 2, characterized in that, The bridge-type unblocking central sleeve (13) and the central connecting cylinder sleeve (17) are stably connected through a locking pin (39).

15. The integrated device for segmented uniform gas injection and oil production in horizontal wells according to claim 1, characterized in that, The upper central pipe (6) is provided with a sealing ring (42) between the upper central pipe (6) and the thrust cylinder sleeve (10).

16. The integrated device for segmented uniform gas injection and oil production in horizontal wells according to claim 2, characterized in that, The bridge-type unblocking central sleeve (13) is provided with a top sealing ring (43) between the bridge-type unblocking central sleeve (13) and the bridge-type unblocking central sleeve (17).

17. A horizontal well segmented uniform steam injection and oil production integrated method, characterized in that, The steps of the well pipe column oil production after steam injection are as follows: (1) Assemble the downhole tools in the order of steam injection packer + integrated steam control device + integrated steam control device + … + tail pipe and lower them to the predetermined position; (2) Pump truck pressure, push the cylinder sleeve (10) to run up with the seat cylinder sleeve (12) cut off the seat pin (37), push the cylinder sleeve (10) up to run, under the action of the center pipe (5), slowly and evenly expand outward, against a week of mutual superimposed steel belt (9) on the casing wall, the seat cylinder sleeve (12) inner wall sawtooth teeth with the elastic locking ring (15) pop up, make push the cylinder sleeve (10) no longer back, packer setting, the inner part of the triangular expansion ring (7) and the rectangular expansion ring (8) are misaligned, and are pressed together to seal; (3) Pump truck pressure packer setting at the same time, the sliding cylinder sleeve (23) to run up compression spring (34), blocked, the inlet sleeve (25) under the action of pressure down, inlet sleeve (25) unseal pin (39) is cut off, continue to down, locking block (24) under the action of the wave spring (35) pop up, top to the inlet sleeve (25) is provided in the groove, inlet sleeve (25) and sliding cylinder sleeve (23) are connected together; (4) stop pressure, packer has been set, inlet sleeve (25) under the action of compression spring (34) down, run to the top ring (27), the lower center tube (26) on the injection hole and the injection hole on the inlet sleeve (25) corresponding, injection channel is opened; (5) steam injection, well, down into the oil pump oil.

Images