Double-layer four-flashboard integrated coiled tubing blowout preventer

Abstract

The utility model relates to the technical field of oil field coiled tubing equipment, and particularly discloses a double-layer four-ram integrated coiled tubing blowout preventer which comprises a blowout preventer body, the blowout preventer body is provided with two sets of shearing hydraulic cylinders, two sets of full-sealing hydraulic cylinders, two sets of semi-sealing hydraulic cylinders and two sets of slip hydraulic cylinders, the two sets of shearing hydraulic cylinders are located above the two sets of full-sealing hydraulic cylinders, the two sets of semi-sealing hydraulic cylinders are located above the two sets of slip hydraulic cylinders, and the slip hydraulic cylinders are located above the two sets of full-sealing hydraulic cylinders. The two groups of shearing hydraulic cylinders and the two groups of full-sealing hydraulic cylinders are oppositely arranged, the two groups of slip hydraulic cylinders are located above the two groups of semi-sealing hydraulic cylinders, the two groups of slip hydraulic cylinders and the two groups of semi-sealing hydraulic cylinders are oppositely arranged, the shearing hydraulic cylinders and the slip hydraulic cylinders are arranged in a crossed manner, and the full-sealing hydraulic cylinders and the semi-sealing hydraulic cylinders are arranged in a crossed manner; according to the continuous oil pipe blowout preventer, the periphery of the blowout preventer body is arranged in a distributed mode, the shearing hydraulic cylinder and the slip hydraulic cylinder are arranged on the same layer, the full-sealing hydraulic cylinder and the semi-sealing hydraulic cylinder are arranged on the same layer, operation is conducted in a distributed mode, mutual interference is avoided, the height of the continuous oil pipe blowout preventer is reduced, climbing installation and maintenance are avoided, and installation convenience and safety are improved.

Description

Technical Field

[0001] This utility model relates to the field of oilfield coiled tubing equipment technology, specifically a double-layer four-gate integrated coiled tubing blowout preventer. Background Technology

[0002] With the development of oilfields, efficient and safe operating modes are the future direction of oilfield construction. Coiled tubing operations are increasingly being used in various fields of oilfields due to their advantages such as short operation cycles and the ability to run and pull tubing under pressure. Coiled tubing blowout preventers (BOPs) are essential oilfield equipment for coiled tubing operations. Typically, a coiled tubing BOP is a four-gate BOP, which can seal the well and anchor the tubing string even with tubing and an empty wellbore. It can also shear the tubing to achieve well sealing when necessary.

[0003] Existing blowout preventers (BOPs) are mainly four-layer, four-gate BOPs, with one layer each for partial sealing, slips, shearing, and full sealing, each fulfilling its respective function. Due to their four-layer design, these four-gate BOPs are quite tall, which can cause installation difficulties and require working at height in some well sites or where equipment is limited. Therefore, there is a need to design a double-layer, four-gate integrated coiled tubing BOP for oilfield coiled tubing installation to reduce the overall height of the BOP and solve the problems of installation difficulties and the need for working at height. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a double-layer four-gate integrated coiled tubing blowout preventer for use in oilfield coiled tubing construction.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a double-layer four-gate integrated continuous tubing blowout preventer, including a blowout preventer body, on which are provided two sets of shearing cylinders, two sets of fully sealed cylinders, two sets of semi-sealed cylinders and two sets of slip cylinders. The two sets of shearing cylinders are located above the two sets of fully sealed cylinders, and the two sets of shearing cylinders and the two sets of fully sealed cylinders are arranged opposite to each other. The two sets of slip cylinders are located above the two sets of semi-sealed cylinders, and the two sets of slip cylinders and the two sets of semi-sealed cylinders are arranged opposite to each other. The shearing cylinders and slip cylinders are arranged crosswise, and the fully sealed cylinders and the semi-sealed cylinders are arranged crosswise.

[0006] Specifically, the shearing cylinder includes a shearing block assembly, a shearing cylinder cover plate, a shearing cylinder body, a manual shearing rod, and a shearing cylinder piston. The shearing cylinder cover plate is fixedly installed on the shearing cylinder body and is bolted to the blowout preventer body. The shearing cylinder piston is movably installed inside the shearing cylinder body. The shearing block assembly is installed on the inner side of the shearing cylinder piston, and the manual shearing rod is connected to the outer side of the shearing cylinder piston. The manual shearing rod extends out of the shearing cylinder body and controls the movement of the shearing cylinder piston within the shearing cylinder body, enabling manual shearing in the event of hydraulic system failure.

[0007] Specifically, the shear block assembly has a groove on the wellbore side near the blowout preventer body, and a cutter is installed on the shear block assembly, with the cutter located at the top of the groove.

[0008] Specifically, the fully sealed hydraulic cylinder includes a fully sealed block assembly, a fully sealed hydraulic cylinder cover plate, a fully sealed hydraulic cylinder body, a manual fully sealed rod, and a fully sealed hydraulic cylinder piston. The fully sealed hydraulic cylinder cover plate is fixedly installed on the cylinder body and is bolted to the blowout preventer body. The fully sealed hydraulic cylinder piston is movably installed inside the cylinder body. The fully sealed block assembly is installed on the inner side of the piston. The manual fully sealed rod is connected to the outer side of the piston and extends out of the cylinder body. The manual fully sealed rod controls the piston to move within the cylinder body and manually closes the full seal when the hydraulic system fails.

[0009] Specifically, the fully sealed block assembly has a fully sealed rubber protrusion on the wellbore side near the blowout preventer body, and the fully sealed rubber protrusion protrudes from the middle of the fully sealed block assembly.

[0010] Specifically, the semi-sealing cylinder includes a semi-sealing block assembly, a semi-sealing cylinder cover plate, a semi-sealing cylinder body, a manual semi-sealing rod, and a semi-sealing cylinder piston. The semi-sealing cylinder cover plate is fixedly installed on the cylinder body and is bolted to the blowout preventer body. The semi-sealing cylinder piston is movably installed inside the cylinder body. The semi-sealing block assembly is installed on the inner side of the piston. The manual semi-sealing rod is connected to the outer side of the piston and extends out of the cylinder body. The manual semi-sealing rod controls the movement of the piston within the cylinder body and manually closes the full seal when the hydraulic system fails.

[0011] Specifically, the semi-sealing block assembly has a vertical semi-sealing groove on the wellbore side near the blowout preventer body, and a semi-sealing protrusion in the middle of the semi-sealing block assembly. The semi-sealing protrusion protrudes from the middle of the semi-sealing block assembly and has a recessed structure that matches the semi-sealing groove.

[0012] Specifically, the slip cylinder includes a slip block assembly, a slip cylinder cover plate, a slip cylinder body, a manual slip rod, and a slip cylinder piston. The slip cylinder cover plate is fixedly installed on the slip cylinder body and is bolted to the blowout preventer body. The slip cylinder piston is movably installed inside the slip cylinder body. The slip block assembly is installed on the inner side of the slip cylinder piston, and the manual slip rod is connected to the outer side of the slip cylinder piston. The manual slip rod extends out of the slip cylinder body and controls the movement of the slip cylinder piston within the slip cylinder body. In the event of hydraulic system failure, the full seal is manually closed.

[0013] Specifically, the slip assembly has a vertical tubing slot on the wellbore side near the blowout preventer body, which holds the tubing inside the wellbore.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The double-layer, four-gate integrated coiled tubing blowout preventer designed in this utility model adopts a distributed arrangement around the blowout preventer body, with the shearing cylinder and slip cylinder arranged on the same layer, and the fully sealed cylinder and semi-sealed cylinder arranged on the same layer, so that they can operate in a distributed manner without interfering with each other. This reduces the height of the coiled tubing blowout preventer, avoids the need for climbing for installation and maintenance, and improves the convenience and safety of installation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a double-layer, four-gate integrated continuous tubing blowout preventer.

[0017] Figure 2 Cross-section of a double-layer, four-gate integrated coiled tubing blowout preventer Figure 1 .

[0018] Figure 3 Cross-section of a double-layer, four-gate integrated coiled tubing blowout preventer Figure 2 .

[0019] Figure 4 This is a schematic diagram of the shear block assembly.

[0020] Figure 5 This is a schematic diagram of the structure of the fully enclosed block assembly.

[0021] Figure 6 This is a schematic diagram of the semi-sealed block assembly.

[0022] Figure 7 This is a schematic diagram of the valve block assembly.

[0023] In the diagram: 1. Blowout preventer body; 2. Shear fluid cylinder; 3. Full seal fluid cylinder; 4. Semi-seal fluid cylinder; 5. Slip fluid cylinder;

[0024] 2-1 Shear block assembly; 2-2 Shear fluid cylinder cover plate; 2-3 Shear fluid cylinder body; 2-4 Manual shear rod; 2-5 Shear fluid cylinder piston;

[0025] 3-1 Fully sealed block assembly; 3-2 Fully sealed hydraulic cylinder piston; 3-3 Fully sealed hydraulic cylinder cover plate; 3-4 Fully sealed hydraulic cylinder piston; 3-5 Manual fully sealed rod;

[0026] 4-1 Semi-sealing block assembly; 4-2 Semi-sealing cylinder piston; 4-3 Semi-sealing cylinder cover plate; 4-4 Semi-sealing cylinder piston; 4-5 Manual semi-sealing rod;

[0027] 5-1 Slip block assembly; 5-2 Slip cylinder cover plate; 5-3 Slip cylinder body; 5-4 Manual slip rod; 5-5 Slip cylinder piston. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] like Figures 1-7 As shown, a double-layer four-gate integrated continuous tubing blowout preventer includes a blowout preventer body 1. The blowout preventer body 1 is equipped with two sets of shearing fluid cylinders 2, two sets of fully sealed fluid cylinders 3, two sets of semi-sealed fluid cylinders 4, and two sets of slip fluid cylinders 5. The two sets of shearing fluid cylinders 2 are located above the two sets of fully sealed fluid cylinders 3, and the two sets of shearing fluid cylinders 2 and the two sets of fully sealed fluid cylinders 3 are arranged opposite each other. The two sets of slip fluid cylinders 5 are located above the two sets of semi-sealed fluid cylinders 4, and the two sets of slip fluid cylinders 5 and the two sets of semi-sealed fluid cylinders 4 are arranged opposite each other. The shearing fluid cylinders 2 and the slip fluid cylinders 5 are arranged at a 90° intersection on the same plane, and the fully sealed fluid cylinders 3 and the semi-sealed fluid cylinders 4 are arranged at a 90° intersection on the same plane.

[0030] The shearing cylinder 2 includes a shearing block assembly 2-1, a shearing cylinder cover plate 2-2, a shearing cylinder body 2-3, a manual shearing rod 2-4, and a shearing cylinder piston 2-5. The shearing cylinder cover plate 2-2 is fixedly installed on the shearing cylinder body 2-3 and is bolted to the blowout preventer body 1. The shearing cylinder piston 2-5 is movably installed inside the shearing cylinder body 2-3. The shearing block assembly 2-1 is installed on the inner side of the shearing cylinder piston 2-5. The manual shearing rod 2-4 is connected to the outer side of the shearing cylinder piston 2-5 through a bearing. The manual shearing rod 2-4 is threaded and threaded to the outer side of the shearing cylinder body 2-3. The manual shearing rod 2-4 extends out of the shearing cylinder body 2-3, and its rotation controls the movement of the shearing cylinder piston 2-5 within the shearing cylinder body 2-3.

[0031] The shear block assembly 2-1 has a groove on the wellbore side near the blowout preventer body 1. A cutter 2-6 is installed on the shear block assembly 2-1. The cutter 2-6 is located at the top of the groove and shears the tubing string.

[0032] The fully sealed cylinder 3 includes a fully sealed block assembly 3-1, a fully sealed cylinder cover plate 3-3, a fully sealed cylinder body 3-4, a manual fully sealed rod 3-5, and a fully sealed cylinder piston 3-2. The fully sealed cylinder cover plate 3-3 is fixedly installed on the cylinder body 3-4 and is bolted to the blowout preventer body 1. The fully sealed cylinder piston 3-2 is movably installed inside the cylinder body 3-4, and the fully sealed block assembly is installed on the inner side of the piston 3-2. Form 3-1, the outside of the fully sealed liquid cylinder piston 3-2 is connected to the manual fully sealed rod 3-5. The manual fully sealed rod 3-5 is rotatably connected to the fully sealed liquid cylinder piston 3-2 through a bearing. The manual fully sealed rod 3-5 is threaded and threaded to the outside of the fully sealed liquid cylinder body 3-4. The manual fully sealed rod 3-5 extends out of the fully sealed liquid cylinder body 3-4 and controls the movement of the fully sealed liquid cylinder piston 3-2 within the fully sealed liquid cylinder body 3-4.

[0033] The full sealing block assembly 3-1 is provided with a full sealing protrusion 3-6 on the wellbore side near the blowout preventer body 1. The full sealing protrusion 3-6 protrudes from the middle of the full sealing block assembly 3-1 and is positioned opposite to seal the wellbore.

[0034] The semi-sealing cylinder 4 includes a semi-sealing block assembly 4-1, a semi-sealing cylinder cover plate 4-3, a semi-sealing cylinder body 4-4, a manual semi-sealing rod 4-5, and a semi-sealing cylinder piston 4-2. The semi-sealing cylinder cover plate 4-3 is fixedly installed on the semi-sealing cylinder body 4-4 and is bolted to the blowout preventer body 1. The semi-sealing cylinder piston 4-2 is movably installed inside the semi-sealing cylinder body 4-4, and the semi-sealing block assembly is installed on the inner side of the semi-sealing cylinder piston 4-2. The semi-sealed cylinder piston 4-2 is connected to a manual semi-sealing rod 4-5 on the outside. The manual semi-sealing rod 4-5 is rotatably connected to the semi-sealed cylinder piston 4-2 through a bearing. The manual semi-sealing rod 4-5 is threaded and threaded to the outside of the semi-sealed cylinder body 4-4. The manual semi-sealing rod 4-5 extends out of the semi-sealed cylinder body 4-4 and controls the movement of the semi-sealed cylinder piston 4-2 within the semi-sealed cylinder body 4-4.

[0035] The semi-sealing block assembly 4-1 has a vertical semi-sealing groove 4-7 on the wellbore side near the blowout preventer body 1. The semi-sealing block assembly 4-1 has a semi-sealing protrusion 4-6 in the middle. The semi-sealing protrusion 4-6 protrudes from the middle of the semi-sealing block assembly 4-1. The semi-sealing protrusion 4-6 has a recessed structure that matches the semi-sealing groove 4-7. The semi-sealing protrusion 4-6 is positioned opposite to the semi-sealed wellbore.

[0036] The slip cylinder 5 includes a slip block assembly 5-1, a slip cylinder cover plate 5-2, a slip cylinder body 5-3, a manual slip rod 5-4, and a slip cylinder piston 5-5. The slip cylinder cover plate 5-2 is fixedly mounted on the slip cylinder body 5-3 and is bolted to the blowout preventer body 1. The slip cylinder piston 5-5 is movably mounted inside the slip cylinder body 5-3, and the slip block assembly is mounted on the inner side of the slip cylinder piston 5-5. Form 5-1, the outer side of the slip cylinder piston 5-5 is connected to the manual slip rod 5-4. The manual slip rod 5-4 is rotatably connected to the slip cylinder piston 5-5 through a bearing. The manual slip rod 5-4 is threaded and threaded to the outer side of the slip cylinder body 5-3. The manual slip rod 5-4 extends out of the slip cylinder body 5-3 and controls the movement of the slip cylinder piston 5-5 within the slip cylinder body 5-3.

[0037] The slip assembly 5-1 has a vertical tubing slot 5-6 on the wellbore side near the blowout preventer body 1, which holds the tubing in the wellbore.

[0038] This utility model is not limited to the above-described embodiments. Anyone should know that any structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model.

[0039] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-layer, four-gate integrated continuous tubing blowout preventer, characterized in that, The device includes a blowout preventer body, which is equipped with two sets of shearing fluid cylinders, two sets of fully sealed fluid cylinders, two sets of semi-sealed fluid cylinders, and two sets of slip fluid cylinders. The two sets of shearing fluid cylinders are located above the two sets of fully sealed fluid cylinders and are arranged opposite to each other. The two sets of slip fluid cylinders are located above the two sets of semi-sealed fluid cylinders and are arranged opposite to each other. The shearing fluid cylinders and slip fluid cylinders are arranged in an alternating manner, as are the fully sealed fluid cylinders and semi-sealed fluid cylinders.

2. The double-layer four-gate integrated continuous tubing blowout preventer according to claim 1, characterized in that, The shearing cylinder includes a shearing block assembly, a shearing cylinder cover plate, a shearing cylinder body, a manual shearing rod, and a shearing cylinder piston. The shearing cylinder cover plate is fixedly installed on the shearing cylinder body and is bolted to the blowout preventer body. The shearing cylinder piston is movably installed inside the shearing cylinder body. The shearing block assembly is installed on the inner side of the shearing cylinder piston, and the manual shearing rod is connected to the outer side of the shearing cylinder piston. The manual shearing rod extends out of the shearing cylinder body and controls the movement of the shearing cylinder piston within the shearing cylinder body.

3. The double-layer four-gate integrated continuous tubing blowout preventer according to claim 2, characterized in that, The shear block assembly has a groove on the wellbore side near the blowout preventer body, and a cutter is installed on the shear block assembly, with the cutter located at the top of the groove.

4. The double-layer four-gate integrated continuous tubing blowout preventer according to claim 1, characterized in that, The fully sealed liquid cylinder includes a fully sealed block assembly, a fully sealed liquid cylinder cover plate, a fully sealed liquid cylinder body, a manual fully sealed rod, and a fully sealed liquid cylinder piston. The fully sealed liquid cylinder cover plate is fixedly installed on the fully sealed liquid cylinder body and is bolted to the blowout preventer body. The fully sealed liquid cylinder piston is movably installed inside the fully sealed liquid cylinder body. The fully sealed block assembly is installed on the inner side of the fully sealed liquid cylinder piston. The manual fully sealed rod is connected to the outer side of the fully sealed liquid cylinder piston and extends out of the fully sealed liquid cylinder body. The manual fully sealed rod controls the movement of the fully sealed liquid cylinder piston within the fully sealed liquid cylinder body.

5. The double-layer four-gate integrated continuous tubing blowout preventer according to claim 4, characterized in that, The full sealing block assembly has a full sealing protrusion on the wellbore side near the blowout preventer body, and the full sealing protrusion protrudes from the middle of the full sealing block assembly.

6. The double-layer four-gate integrated continuous tubing blowout preventer according to claim 1, characterized in that, The semi-sealing cylinder includes a semi-sealing block assembly, a semi-sealing cylinder cover plate, a semi-sealing cylinder body, a manual semi-sealing rod, and a semi-sealing cylinder piston. The semi-sealing cylinder cover plate is fixedly installed on the cylinder body and is bolted to the blowout preventer body. The semi-sealing cylinder piston is movably installed inside the cylinder body. The semi-sealing block assembly is installed on the inner side of the semi-sealing cylinder piston. The manual semi-sealing rod is connected to the outer side of the semi-sealing cylinder piston and extends out of the cylinder body. The manual semi-sealing rod controls the movement of the semi-sealing cylinder piston within the cylinder body.

7. The double-layer four-gate integrated continuous tubing blowout preventer according to claim 6, characterized in that, The semi-sealing block assembly has a vertical semi-sealing groove on the wellbore side near the blowout preventer body, and a semi-sealing protrusion in the middle of the semi-sealing block assembly. The semi-sealing protrusion protrudes from the middle of the semi-sealing block assembly and has a recessed structure that matches the semi-sealing groove.

8. The double-layer four-gate integrated continuous tubing blowout preventer according to claim 1, characterized in that, The slip cylinder comprises a slip block assembly, a slip cylinder cover plate, a slip cylinder body, a manual slip rod, and a slip cylinder piston. The slip cylinder cover plate is fixedly mounted on the slip cylinder body and is bolted to the blowout preventer body. The slip cylinder piston is movably mounted inside the slip cylinder body. The slip block assembly is mounted on the inner side of the slip cylinder piston. The manual slip rod is connected to the outer side of the slip cylinder piston and extends out of the slip cylinder body. The manual slip rod controls the movement of the slip cylinder piston within the slip cylinder body.

9. The double-layer four-gate integrated continuous tubing blowout preventer according to claim 8, characterized in that, The slip block assembly has a vertical rotating column slot on the wellbore side near the blowout preventer body, which clamps the rotating column inside the wellbore.

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