Hydraulic control type blowout preventer anchoring integrated tool

Abstract

The utility model relates to a kind of hydraulic control blowout preventer anchoring integrated tool, belong to screw pump and oil well pump field.It is mainly by releasing hand anchoring component, blowout preventer switch component and including ram rod component, releasing hand anchoring component is connected with blowout preventer switch component to form integral tool, it is jointly connected in the lower end of first trip string, ram rod component is connected in the lower end of second trip string.The tool can prevent well fluid overflow, protect environment, avoid well fluid to flow out and cause pollution.

Description

Technical Field

[0001] This invention belongs to the field of screw pumps and oil pumps, and specifically relates to a hydraulically controlled integrated blowout preventer and anchoring tool. Background Technology

[0002] Currently, both plugging tubing and production tubing require blowout preventers (BOPs) when the fluid volume is large and the pressure is high. While existing BOPs can achieve the function of preventing blowout, they all require the use of a movable tubing string to complete the BOP and open the well. When the tubing string is moved, it is impossible to prevent well fluid from flowing out of the wellhead and causing pollution. Furthermore, effective BOP cannot be performed when installing the wellhead during well completion, resulting in environmental pollution and unnecessary losses.

[0003] The main problems include the following: (1) When the blowout preventer is released, the moving tubing causes well fluid to overflow and pollute the environment; (2) When the wellhead is installed during well completion, the blowout preventer must be in the open state, which cannot prevent well fluid from flowing out and causing pollution. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a hydraulically controlled integrated blowout preventer and anchoring tool.

[0005] The technical solution adopted in the invention is: a hydraulically controlled anti-blowout anchoring integrated tool, the key technical point of which is that it includes a release anchoring component and an anti-blowout switch component, wherein the release anchoring component and the anti-blowout switch component are assembled into an integrated tool.

[0006] In the above scheme, the release anchoring assembly includes an upper connector, which is connected to the release connector and then fitted into the retrieval head. A sealing sleeve is threadedly connected to the first central tube and fitted onto the outside of the release connector, locked to the release connector by a first locking block. A release piston, fixed by a release pin, is installed outside the first locking block and fitted into the retrieval connector threaded to the retrieval head. A second central tube, fixed by a second locking block, is connected to the lower part of the first central tube, and a retaining ring and a retaining ring are installed outside the second central tube, fixed to the retrieval connector by a release pin. A seated piston is installed outside the third central tube and fixed by a third locking block. A seated slider is installed on the outside of the heart tube and fixed with a seated pin. The lower part of the first outer protective sleeve is connected to the seated piston, which is inserted into the second central tube. The central tubes are connected to each other with threads. The fourth central tube is fitted on the third central tube and connected to the seated piston. The fourth central tube is fitted with the first side rubber sleeve, gasket, middle rubber sleeve, second gasket, second side rubber sleeve, and spacer ring in sequence. The upper slip slider is connected to the lower part of the spacer ring. A slip sleeve is installed on the outside of the spacer ring, and a set of slips and springs are installed inside. The lower slip slider and adjusting ring are connected to the lower part of the slip sleeve. The lower connector is installed at the bottom of the adjusting ring and is connected to the lower slip slider and the fourth central tube at the same time.

[0007] In the above scheme, the anti-blowout switch assembly includes an upper outer sleeve, an inner baffle connected to the upper outer sleeve, a fixed sleeve connected to the inner baffle, a piston rod inserted into the fixed sleeve, and an outer sealing sleeve connected to the outer side of the fixed sleeve. A spring is provided between the fixed sleeve and the sealing sleeve. An upper connector is connected to the upper part of the upper outer sleeve, and a connecting sleeve is connected to the lower part of the upper outer sleeve. Long and short grooves are machined on the outside of the central tube, and a guide ring is fixed to the central tube using guide pins. A guide sleeve is installed on the outside of the central tube and connected to a pressure relief needle valve. A needle valve and a baffle are installed inside the pressure relief needle valve, and a third spring is pressed between the needle valve and the baffle. A lower connector is installed at the lower part of the central tube through the tail of the spring, and an outer sleeve is connected to the upper part of the lower connector. The upper part of the outer sleeve is connected to the connecting sleeve.

[0008] The above solution also includes a sting rod assembly, which includes a sting rod head, a sting rod with a liquid inlet hole, and an upper connector. One end of the sting rod is connected to the sting rod head, and the other end is connected to the upper connector.

[0009] In the above scheme, the nozzle head is provided with a groove that mates with the piston rod of the anti-blowout switch assembly.

[0010] The beneficial effects of this invention are as follows: This hydraulically controlled blowout preventer (BOP) anchoring integrated tool mainly consists of a release anchoring assembly, a BOP switch assembly, and a shovel rod assembly. The release anchoring assembly and the BOP switch assembly are connected to form an integrated tool, which is connected to the lower end of the first tubing string. The shovel rod assembly is connected to the lower end of the second tubing string. This tool can prevent well fluid from overflowing, protect the environment, and avoid pollution caused by well fluid outflow. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the hydraulic release packer structure in an embodiment of the present invention;

[0013] Figure 2 This is a schematic diagram of the pressure-controlled blowout preventer switch structure in an embodiment of the present invention;

[0014] Figure 3 This is a schematic diagram of the push rod assembly structure in an embodiment of the present invention;

[0015] Figure 4 This is a schematic diagram of the structure after the hydraulic release packer and the pressure-controlled blowout preventer are connected in an embodiment of the present invention;

[0016] The serial numbers in the diagram are explained as follows: Hydraulic release packer 1: Upper connector 1-1; Sheath 1-2; Release connector 1-3; Retrieval head 1-4; Sealing sleeve 1-5; Retrieval connector 1-6; First outer protective tube 1-7; First central tube 1-8; Release piston 1-9; Release pin 1-10; First locking block 1-11; Second central tube 1-12; Unsealing pin 1-13; Second locking block 1-14; Snap ring 1-15; Snap ring 1-16; Third central tube 1-17; Sealing block slider 1-18; Sealing pin 1-19; Locking block 3 1-20; Second outer protective tube 1-21; Seated piston 1-22; Fourth center tube 1-23; Side rubber sleeve 1-24; Gasket 1-25; Middle rubber sleeve 1-26; Spacer ring 1-27; Upper slip slider 1-28; Slip sleeve 1-29; Slip 1-30; Spring 1-31; Lower slip slider 1-32; Adjusting ring 1-33; Lower connector 1-34; Pressure-controlled anti-blowout switch 2: Upper connector 2-1; Upper outer sleeve 2-2; Baffle 2-3; Fixed sleeve 2-4 Piston rod 2-5; sealing sleeve 2-6; connecting sleeve 2-7; outer sleeve 2-8; pressure relief needle valve 2-9; guide sleeve 2-10; guide ring 2-11; guide pin 2-12; central tube 2-13; spring 2-14; lower connector 2-15; second spring 2-16; needle valve 2-17; baffle 2-18; third spring 2-19; ​​stab rod assembly 3; stab rod head 3-1; stab rod 3-2; upper connector 3-3. Detailed Implementation

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the following description is provided in conjunction with the accompanying drawings. Figures 1-2 The present invention will be further described in detail below with reference to specific embodiments.

[0018] The embodiment of this invention provides a hydraulically controlled blowout preventer anchoring integrated tool, including a release anchoring assembly, a blowout preventer switch assembly, and a push rod assembly. The release anchoring assembly and the blowout preventer switch assembly are connected to form an integrated tool, which is connected to the lower end of the first pass of the tubing, and the push rod assembly is connected to the lower end of the second pass of the tubing.

[0019] The release anchoring assembly in this embodiment mainly consists of a hydraulic release packer. The hydraulic release packer includes an upper connector 1-1, which is threadedly connected to the release connector 1-3 and then fitted with a retrieval head 1-4. A sealing sleeve 1-5 is threadedly connected to the first central tube 1-8 and fitted onto the outside of the release connector 1-3. The first central tube 1-8 is locked to the outside of the release connector 1-3 by a first locking block 1-11. A release piston 1-9 is installed on the outside of the first central tube 1-8 and fixed with a release pin 1-10. A retrieval connector 1-6, threadedly connected to the retrieval head 1-4, is installed on the outside of the release piston 1-9. A retaining ring 1-15 and a retaining ring 1-16 are installed on the outside of the second central tube 1-12 connected to the lower part of the first central tube 1-8. The second central tube 1-12 is fixed by a second locking block 1-14 and fixed to the retrieval connector 1-6 with a release pin 1-13. A seated piston 1-22 is installed on the outside of the third center tube 1-17. The third center tube 1-17 is fixed by the third locking block 1-20. A seated slider 1-18 is installed on the outside of the third center tube 1-17 and fixed by a seated pin 1-19. The first outer protective sleeve 1-7 is connected to the upper part of the second outer protective sleeve 1-21. The lower part of the second outer protective sleeve 1-21 is connected to the seated piston 1-22. The seated piston 1-22 is connected to the outside of the first center tube 1-8. The second center tube 1-12 is threadedly connected to the third center tube 1-17. The fourth center tube 1-23 is fitted onto the third center tube 1-17 and threadedly connected to the seated piston 1-22. The fourth center tube 1-23 is sequentially fitted with the side rubber sleeve 1-24, the first gasket 1-25, the middle rubber sleeve 1-26, the second gasket, the second side rubber sleeve, and the spacer ring 1-27. The upper slip slider 1-28 is connected to the lower part of the spacer ring 1-27. The slip sleeve 1-29 is installed on the outside of the upper slip slider 1-28. Three sets of slips 1-30 and springs 1-31 are installed inside the slip sleeve 1-29. The lower slip slider 1-32 and the adjusting ring 1-33 are connected to the lower part of the slip sleeve 1-29. The lower connector 1-34 is installed at the bottom of the lower slip slider 1-32. The lower slip slider 1-32 and the fourth center tube 1-23 are threadedly connected at the same time.

[0020] The blowout preventer assembly in this embodiment includes a pressure-controlled blowout preventer. The pressure-controlled blowout preventer includes an upper connector 2-1 connected to a lower connector 1-34. One end of the upper connector 2-1 is inserted into an upper outer sleeve 2-2. A baffle 2-3 is connected inside the upper outer sleeve 2-2. A fixing sleeve 2-4 is connected inside the baffle 2-3. A piston rod 2-5 is inserted inside the fixing sleeve 2-4. A sealing sleeve 2-6 is connected to the outside of the fixing sleeve 2-4. A second spring 2-16 is provided between the fixing sleeve 2-4 and the sealing sleeve 2-6. The lower part of the upper connector 2-1 is connected to a connecting sleeve 2-7, and the connecting sleeve 2-7 is connected to an outer sleeve 2-8. A pressure relief needle valve 2-9 is provided inside the outer sleeve 2-8, and one end of the central tube 2-13 is inserted into the pressure relief needle valve 2-9. The central tube 2-13 has long and short grooves machined on its exterior. A guide ring 2-11 is fixed to the central tube 2-13 using a guide pin 2-12. A guide sleeve 2-10 is installed on the outside of the guide ring 2-11. A needle valve 2-17 and a baffle 2-18 are installed inside the pressure relief needle valve 2-9. One end of the needle valve 2-17 passes through the pressure relief needle valve 2-9, and the other end passes through the baffle 2-18. A third spring 2-19 is installed between the needle valve 2-17 and the baffle 2-18. The other end of the central tube 2-13 is connected to a lower connector 2-15. A spring 2-14 is installed on the central tube 2-13 located between the guide sleeve 2-10 and the lower connector 2-15. An outer sleeve 2-8 is connected to the upper part of the lower connector 2-15, and the upper part of the outer sleeve 2-8 is threaded onto the connecting sleeve 2-7.

[0021] In this embodiment, the push rod 3 includes a push rod head 3-1, a push rod 3-2, and an upper connector 3-3. The push rod head 3-1 has a groove on its end face, which can cooperate with the piston rod 2-5 of the pressure-controlled anti-blowout switch, causing the piston rod 2-5 to move and open or close the switch. The upper connector 3-3 connects to the push rod 3-2, and the lower part of the push rod 3-2 connects to the push rod head 3-1. In this embodiment, the push rod is machined with multiple inlet holes that can replace the screen tube for liquid inlet.

[0022] The working principle of the hydraulically controlled blowout preventer and anchoring integrated tool in this embodiment is as follows:

[0023] The lower connector of the hydraulic release packer and the upper connector of the pressure-controlled blowout preventer are connected to form a single tool, which is attached to the lower end of the first release string. The push rod is attached to the lower end of the second production string.

[0024] 1. The upper end of the hydraulically controlled blowout preventer and anchoring integrated tool is connected to the lower end of the drop string via a thread, and the lower end is connected to the tubing via a thread. After the connection is completed, it is lowered into the well to the pre-designed depth.

[0025] 2. Pressurize the oil pipe. The pressure enters the tool through hole 2. First, the pressure pushes the seat seal slider 1-18 upward to shear the seat seal pin 1-19, causing the third locking block 1-20 to protrude. Continue pressing and the third locking block 1-20 falls off. The seat seal piston 1-22 disengages and moves downward, causing the fourth central tube 1-23 to move downward and compress the side rubber sleeve 1-24 and the middle rubber sleeve 1-26. The side rubber sleeve 1-24 and the middle rubber sleeve 1-26 form a seal with the casing. Continue pressing and the slip 1-30 protrudes outward and anchors onto the casing under the action of the upper slip slider 1-28 and the lower slip slider 1-32's conical surfaces, completing the anchoring. At the same time, the second outer protective tube 1-21 also moves with the seat seal piston 1-22, and its internal teeth engage and lock with the retaining spring 1-16 to prevent the slip and rubber sleeve from springing back.

[0026] 3. Continue pressurizing the tubing. Pressure enters through hole 1, pushing the release piston 1-9 to shear the release pin 1-10 and move downwards. The first locking block 1-11 detaches externally. At this point, the upper connector 1-1, sheath 1-2, and release connector 1-3 separate from other tools and are pulled out with the tubing string. The remaining tools remain in the well. At this time, the pressure relief needle valve 2-9 and the connecting sleeve 2-7 are in tight contact under the action of spring 2-14, sealing the central channel and working with the rubber sleeve to prevent blowout.

[0027] 4. After the first production tubing string is retrieved, the second production tubing string is lowered, with the lower end connected to the shovel rod 3. The production tubing string is higher than the release tubing string to prevent the shovel rod 3 from contacting the lower tool. The wellhead is then installed. At this point, no well fluid should overflow from the wellhead.

[0028] 5. Pressure is applied to the casing, and the pressure is transmitted through the casing to the upper part of the pressure-controlled blowout preventer. Under the pressure, the piston rod 2-5 moves downward, pushing the pressure relief needle valve 2-9 apart from the connecting sleeve 2-7. The guide pin 2-12 moves along the inner track of the central tube 2-13 to the short rail, opening the central channel. Downhole fluid can then pass through the gap between the pressure relief needle valve 2-9 and the connecting sleeve 2-7, pushing the sealing sleeve 2-6 into the upper part, and then into the tubing for normal production. No well fluid overflows from the wellhead.

[0029] 6. When blowout prevention is required again, the piston rod 2-5 can be pressed into the casing again. Under pressure, it moves downward and pushes the pressure relief needle valve 2-9 and the guide pin 2-12 along the inner track of the central tube 2-13 to the long rail. Under the action of the spring 2-14, the pressure relief needle valve 2-9 moves upward and contacts the connecting sleeve 2-7 again, closing the central channel and preventing downhole fluid from entering, thus completing the blowout prevention.

[0030] During the salvage operation, the salvage tool enters the hydraulic release packer and engages with the threaded connection of salvage connector 1-4, then the tubing is lifted. The lifting load is transmitted to the release pin 1-13 through salvage connector 1-6. Shearing the release pin 1-13 releases the second locking block 1-14, freeing the snap ring 1-16. This causes the outer protective tube 1-7 and the second outer protective tube 1-21 to move upwards, creating space. The side rubber sleeve 1-24, the middle rubber sleeve 1-26, and the slip 1-30 retract under elastic force, completing the release. Continued lifting completes the salvage operation.

[0031] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A hydraulically controlled integrated blowout preventer and anchoring tool, characterized in that, It includes a release anchoring assembly and a blowout preventer assembly, which are assembled into a single tool and connected together to the lower end of the first tubing string. The push rod assembly is connected to the lower end of the second tubing string. The aforementioned release anchoring assembly includes an upper connector, which is connected to the release connector and then fitted into the retrieval head. A sealing sleeve is threadedly connected to the first central tube and then fitted onto the release connector, and locked to the release connector by a first locking block. A release piston, fixed by a release pin, is installed on the outside of the first locking block and fitted into the retrieval connector threaded to the retrieval head. A second central tube, fixed by a second locking block, is connected to the lower part of the first central tube, and a retaining ring and a retaining ring are installed on the outside of the second central tube. The second central tube is fixed to the retrieval connector using a release pin. A seated piston is installed on the outside of the third central tube and fixed by a third locking block. A seated slider is installed on the outside of the third central tube and... The sealing pin is fixed. The first outer protective sleeve is connected to the second outer protective sleeve. The lower part of the second outer protective sleeve is connected to the sealing piston. The sealing piston is sleeved on the third central tube and the second central tube is connected to the third central tube by threads. The fourth central tube is sleeved on the third central tube and connected to the sealing piston. The first side rubber sleeve, gasket, middle rubber sleeve, second gasket, second side rubber sleeve and spacer are sequentially sleeved on the outside of the fourth central tube. The upper slip slider is connected to the lower part of the spacer. The slip sleeve is installed on the outside of the spacer. Three sets of slips and springs are installed inside the slip sleeve. The lower slip slider and adjusting ring are connected at the lower part of the slip sleeve. The lower connector is installed at the bottom of the lower slip slider. The lower connector is connected to the lower slip slider and the fourth central tube at the same time. The blowout preventer assembly includes an upper outer sleeve, an inner baffle connected to the upper outer sleeve, a fixed sleeve connected to the baffle, a piston rod inserted into the fixed sleeve, and an outer sealing sleeve connected to the outside of the fixed sleeve. A second spring is provided between the fixed sleeve and the sealing sleeve. An upper connector is connected to the upper part of the upper outer sleeve, and a connecting sleeve is connected to the lower part of the upper outer sleeve. Long and short grooves are machined on the outside of the central tube. A guide ring is fixed to the central tube using guide pins. A guide sleeve is installed on the outside of the central tube and connected to a pressure relief needle valve. A needle valve and a baffle are installed inside the pressure relief needle valve. A third spring is pressed between the needle valve and the baffle. A first spring passes through the lower part of the central tube, and a lower connector is installed at the tail of the central tube. An outer sleeve is connected to the upper part of the lower connector, and the upper part of the outer sleeve is connected to the connecting sleeve. It also includes a sting rod assembly, which includes a sting rod head, a sting rod with a liquid inlet hole, and an upper connector. One end of the sting rod is connected to the sting rod head, and the other end is connected to the upper connector.

2. The hydraulically controlled blowout preventer and anchoring integrated tool as described in claim 1, characterized in that, The head of the punch rod is provided with a groove that mates with the piston rod of the anti-blowout switch assembly.

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