A blowout preventer valve and a tubular string comprising the same

Abstract

The utility model relates to a kind of blowout preventer and column including it, it includes: valve body, inside is provided with valve seat;Plugging body, with first position or second position, in first position the blowout preventer opens, in second position the blowout preventer is closed;With the elastic drive component of flow channel, it is connected plugging body, the elastic drive component has compressed form or uncompressed form, in compressed form it makes plugging body be in first position, in uncompressed form it described plugging body moves upward so that plugging body is in second position;Locking body, for locking elastic drive component in valve body so that it is in compressed form, the locking body has exposed force section so that it is broken after being subjected to external force to unlock elastic drive component so that it is in uncompressed form.The blowout preventer simple structure, easy operation, cost is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of downhole operation equipment technology, and in particular to a blowout preventer valve and a tubing string including the same. Background Technology

[0002] In the middle and late stages of oil and gas field development, the existing methods of well control, hydraulic wells, or conventional operations after blowout are no longer suitable for the needs of efficient oil field development. In recent years, live well operations have become a topic of oil field development. Live well operations can protect the reservoir condition to the greatest extent and avoid damage to the reservoir during conventional operations, providing good technical support for the stable production of oil and gas fields. One of the key technologies for live well operations is the prevention of blowout in the well tubing.

[0003] Existing blowout preventers have complex structures, are cumbersome to assemble, and are costly. How to solve these drawbacks has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] To achieve the above objectives, this utility model provides a blowout preventer valve, as detailed below:

[0005] A blowout preventer, which is used to connect to the downstream opening of a tubing string, includes:

[0006] The valve body has a valve passage that runs through the upper and lower ends of the valve body, and a valve seat is provided inside the valve passage;

[0007] A plugging body having a first position or a second position, wherein in the first position the plugging body is not seated on the valve seat causing the blowout preventer to open, and in the second position the plugging body is seated on the valve seat causing the blowout preventer to close;

[0008] An elastic drive assembly with a flow channel is located inside the valve channel and connected to the plugging body. The elastic drive assembly has a compressed form or an uncompressed form. In the compressed form, it causes the plugging body to be in the first position. In the uncompressed form, it drives the plugging body to move upward so that the plugging body is in the second position.

[0009] A locking body is used to lock the elastic drive assembly to the valve body in a compressed state. The locking body has an exposed force-bearing section that breaks off when subjected to external force to unlock the elastic drive assembly and return it to an uncompressed state.

[0010] Preferably, the elastic drive component includes:

[0011] An elastic body having the aforementioned flow channel has a fixed end at its lower end and a free end at its upper end, with the fixed end located at a fixed position in the valve channel;

[0012] The driving body has a lower end that extends downward from the fixed end of the elastic body and is connected to the sealing body, and an upper end that is a pressing part with the flow channel that presses against the free end of the elastic body.

[0013] Preferably, the locking body connects the pressing part and the valve body, enabling the pressing part to be locked to the valve body.

[0014] Preferably, the valve body includes an annular groove that is open at the upper end and closed at the lower end. In the radial direction, the annular groove is located between an inner circumferential sidewall and an outer circumferential sidewall. A portion of the valve passage is formed inside the inner circumferential sidewall. A first through-hole is formed in the inner circumferential sidewall in the radial direction. An embedding groove is formed on the pressing portion corresponding to the first through-hole. The valve body also includes:

[0015] A sliding sleeve that can slide up and down inside the annular groove has a second through hole extending in the radial direction at the position corresponding to the first through hole, and the top end of the sliding sleeve forms a force-bearing end.

[0016] The locking body is arranged in the radial direction and is inserted into the embedding groove, the first through hole and the second through hole to lock the pressing part to the valve body. The portion of the locking body inserted into the second through hole of the sliding sleeve forms the exposed force-bearing section.

[0017] Preferably, the force-bearing end of the sliding sleeve is narrowed to receive a thrown ball.

[0018] Preferably, the first perforation is an elongated hole extending upwards.

[0019] Preferably, the locking body has a break line formed on it.

[0020] Preferably, the part to be cut is located at the contact point between the sliding sleeve and the inner peripheral sidewall.

[0021] Preferably, the valve body includes:

[0022] A first housing has an upstream connection section and a downstream connection section, the upstream connection section being used to connect a tubular column;

[0023] The second housing has a plug-in section and a second connecting section connected sequentially in the vertical direction. The second connecting section is fixedly connected to the downstream connecting section of the first housing, and the plug-in section extends into the interior of the first housing.

[0024] The annular groove is located between the plug-in section and the first outer shell, and the plug-in section forms the inner peripheral sidewall.

[0025] The anti-blowout valve provided by this utility model has the following beneficial effects:

[0026] The locking mechanism locks the elastic drive assembly into the valve body, placing it in a compressed state. At this position, the plugging body is in the first position, opening the blowout preventer (BOP). During operation, fracturing fluid injection and well fluid pumping can be performed via the connected tubing and the open BOP. When tubing tripping is required, force can be applied to the exposed stress section of the locking mechanism to break it, closing the BOP and isolating formation energy from the upper end of the tubing. This allows for pressurized tubing tripping operations. This BOP features a simple structure, easy operation, and significantly reduced costs.

[0027] As a preferred option, an annular groove or sliding sleeve is provided, which can provide external force by throwing a ball to break the locking body, making the operation convenient.

[0028] Preferably, the first perforation is an upwardly extending elongated hole, which ensures that the broken locking body will not obstruct the operation of the pressure part.

[0029] As a preferred option, a breakable wire is set to ensure that the locking body breaks under stress.

[0030] This utility model also provides a tubing string, including a tubing string body and any of the above-described blowout preventers, wherein the blowout preventer is connected to the downstream opening of the tubing string body.

[0031] It has the same technical effect as above. Attached Figure Description

[0032] Figure 1 This is a longitudinal sectional view of a specific embodiment of the anti-blowout valve of this utility model (when no throwing ball is being thrown).

[0033] Figure 2 This is a longitudinal sectional view of a specific embodiment of the anti-blowout valve of this utility model (when throwing a ball).

[0034] Figure 3 yes Figure 1 A cross-sectional view along the A-A direction.

[0035] Figure 4 yes Figure 1 A cross-sectional view along the B-B direction.

[0036] Figure 5 yes Figure 1 Enlarged view of part C in the middle.

[0037] Legend:

[0038] 1. Pipe column body 2. First outer shell 21. Hollow core of first outer shell 22. First outer shell slot 3. Second outer shell 31. Hollow core of second outer shell 32. Spring platform 33. Long strip hole 4. Sliding sleeve 41. Hollow core of sliding sleeve 5. Sliding groove 6. Stop bar 7. Pin 71. Wire to be cut 8. Guide rod 9. Spring 10. Ball stop seat 11. Ball stop 12. Throwing ball. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Combination Figure 1-5 This utility model provides a blowout preventer valve, which is connected to the downstream opening of a tubing string during use, and includes:

[0041] The valve body has a valve passage that runs through the upper and lower ends of the valve body, and a valve seat is provided inside the valve passage;

[0042] A plugging body having a first position or a second position, wherein in the first position the plugging body is not seated on the valve seat causing the blowout preventer to open, and in the second position the plugging body is seated on the valve seat causing the blowout preventer to close;

[0043] An elastic drive assembly with a flow channel is located inside the valve channel and connected to the plugging body. The elastic drive assembly has a compressed form or an uncompressed form. In the compressed form, it causes the plugging body to be in the first position. In the uncompressed form, it drives the plugging body to move upward so that the plugging body is in the second position.

[0044] A locking body is used to lock the elastic drive assembly to the valve body in a compressed state. The locking body has an exposed force-bearing section that breaks off when subjected to external force to unlock the elastic drive assembly and return it to an uncompressed state.

[0045] The locking mechanism locks the elastic drive assembly into the valve body, placing it in a compressed state. At this position, the plugging body is in the first position, opening the blowout preventer (BOP). During operation, fracturing fluid injection and well fluid pumping can be performed via the connected tubing and the open BOP. When tubing tripping is required, force can be applied to the exposed stress section of the locking mechanism to break it, closing the BOP and isolating formation energy from the upper end of the tubing. This allows for pressurized tubing tripping operations. This BOP features a simple structure, easy operation, and significantly reduced costs.

[0046] When in use, the blowout preventer is connected to a tubing string, which is installed in the oil well for production operations. It includes a tubing string body 1, which has an internal hollow core.

[0047] In one specific implementation, combined with Figure 1-5 The valve body includes:

[0048] A first housing 2 has an upstream connecting section and a downstream connecting section, the upstream connecting section being used to connect a tubular column;

[0049] The second outer shell 3 has a plug-in section and a second connecting section connected sequentially in the vertical direction. The second connecting section is fixedly connected to the downstream connecting section of the first outer shell 2, and the plug-in section extends into the interior of the first outer shell 2.

[0050] The first outer shell 2 has a first outer shell slot 22 on its upper surface for connecting the column body 1, and the column body 1 is connected through the first outer shell slot 22.

[0051] like Figure 1-2 As shown, the downstream connecting section of the first housing 2 and the second connecting section of the second housing 3 can be threaded connections.

[0052] In one specific implementation, such as Figure 1-2 As shown, the valve seat is a ball-stopping seat 10 disposed below the second housing 3, and the sealing body is a ball-stopping body 11.

[0053] The elastic drive component includes:

[0054] An elastic body having the aforementioned flow channel has a fixed end at its lower end and a free end at its upper end, with the fixed end located at a fixed position in the valve channel;

[0055] The driving body has a lower end that extends downward from the fixed end of the elastic body and is connected to the sealing body, and an upper end that is a pressing part with the flow channel that presses against the free end of the elastic body.

[0056] The locking body connects the pressing part and the valve body, enabling the pressing part to be locked to the valve body.

[0057] The valve body includes an annular groove that is open at the top and closed at the bottom. In the radial direction, the annular groove is located between an inner circumferential sidewall and an outer circumferential sidewall. A portion of the valve passage is formed inside the inner circumferential sidewall. A first through-hole is formed in the inner circumferential sidewall in the radial direction. An embedding groove is formed on the pressing portion corresponding to the first through-hole. The valve body also includes:

[0058] The sliding sleeve 4 is able to slide up and down inside the annular groove. The sliding sleeve 4 has a second through hole extending in the radial direction at the position corresponding to the first through hole. The top end of the sliding sleeve 4 forms a force-bearing end.

[0059] The locking body is arranged in the radial direction and is inserted into the embedding groove, the first through hole and the second through hole to lock the pressing part to the valve body. The portion of the locking body inserted into the second through hole of the sliding sleeve forms the exposed force-bearing section.

[0060] The force-bearing end of the sliding sleeve 4 is designed with a constricted opening, which can support a thrown ball 12.

[0061] In one specific implementation, such as Figure 1-5 As shown, the annular groove is between the plug-in section and the first outer shell 2, and the plug-in section forms the inner peripheral sidewall.

[0062] The first outer shell 2, the second outer shell 3, and the sliding sleeve 4 have hollow cores inside, namely the first outer shell hollow core 21, the second outer shell hollow core 31, and the sliding sleeve hollow core 41.

[0063] A sliding groove 5 (a specific embodiment of an annular sliding groove) is provided between the first outer shell 2 and the second outer shell 3. The lower part of the sliding sleeve 4 is located in the sliding groove 5 and can slide up and down. A stop bar 6 is installed on the upper part of the hollow core 31 of the second outer shell. The stop bar 6 is a specific embodiment of a pressing part. The sliding sleeve 4 has a second through hole, the second outer shell 3 has a first through hole, and the stop bar 6 has an embedding groove. A pin 7 (a specific embodiment of a locking body) is installed in the embedding groove, the first through hole, and the second through hole to fix the stop bar 6. A guide rod 8 is connected to the lower part of the stop bar 6. The stop bar 6 and the connected guide rod 8 form a driving body. The outer periphery of the guide rod 8 has a spring 9 (as an elastic body). The lower part of the second outer shell 3 has a spring platform 32. The spring 9 is installed between the stop bar 6 and the spring platform 32 and is in a compressed state.

[0064] The aforementioned baffle 6 has a herringbone shape. However, it is not limited to this.

[0065] When the thrown ball 12 strikes the upper end of the sliding sleeve 4 along the hollow core 21 of the first outer shell of the tube body 1 and the sliding sleeve 4, the impact force of the thrown ball 12 causes the pin 7 to break, the stop bar 6 to break free from the restraint of the pin 7, and the action of the spring 9 causes the guide rod 8 to move upward, and the stop ball 11 forms a block under the stop ball seat 10.

[0066] When the pipe column needs to be raised, a throwing ball 12 is thrown from the top of the pipe column. The throwing ball 12 falls and generates a huge impact force. The impact force acts on the upper end of the sliding sleeve 4. The impact force of the throwing ball 12 causes the pin 7 to break and the stop bar 6 to break free from the pin. The action of the spring 9 causes the guide rod to move upward. The stop ball 11 forms a block under the stop ball seat 10, blocking the gushing oil and gas, thus achieving the purpose of this utility model.

[0067] In one specific embodiment, the first perforation is an upwardly extending elongated hole 33. This ensures that the broken pin 7 will not obstruct the operation of the stop bar 6.

[0068] A breakage line 71 is formed on the pin 7. The breakage line 71 is set to ensure that the pin 7 will break under force as much as possible.

[0069] In one specific embodiment, the wire to be cut 71 is located at the contact point between the sliding sleeve 4 and the second outer shell 3.

[0070] This utility model also provides a tubing column, including a tubing column body 1 and any of the above-described blowout preventers, wherein the blowout preventer is connected to the downstream opening of the tubing column body 1.

[0071] It has the same technical effect as above.

Claims

1. A blowout preventer valve, characterized in that, This blowout preventer is used by connecting to the downstream opening of a tubing string, and includes: The valve body has a valve passage that runs through the upper and lower ends of the valve body, and a valve seat is provided inside the valve passage; A plugging body having a first position or a second position, wherein in the first position the plugging body is not seated on the valve seat causing the blowout preventer to open, and in the second position the plugging body is seated on the valve seat causing the blowout preventer to close; An elastic drive assembly with a flow channel is located inside the valve channel and connected to the plugging body. The elastic drive assembly has a compressed form or an uncompressed form. In the compressed form, it causes the plugging body to be in the first position. In the uncompressed form, it drives the plugging body to move upward so that the plugging body is in the second position. A locking body is used to lock the elastic drive assembly to the valve body in a compressed state. The locking body has an exposed force-bearing section that breaks off when subjected to external force to unlock the elastic drive assembly and return it to an uncompressed state.

2. The blowout preventer valve according to claim 1, characterized in that, The elastic drive component includes: An elastic body having the aforementioned flow channel has a fixed end at its lower end and a free end at its upper end, with the fixed end located at a fixed position in the valve channel; The driving body has a lower end that extends downward from the fixed end of the elastic body and is connected to the sealing body, and an upper end that is a pressing part with the flow channel that presses against the free end of the elastic body.

3. The blowout preventer valve according to claim 2, characterized in that, The locking body connects the pressing part and the valve body, enabling the pressing part to be locked to the valve body.

4. The blowout preventer valve according to claim 3, characterized in that, The valve body includes an annular groove that is open at the upper end and closed at the lower end. In the radial direction, the annular groove is located between an inner circumferential sidewall and an outer circumferential sidewall. A portion of the valve passage is formed inside the inner circumferential sidewall. A first through-hole is formed in the inner circumferential sidewall in the radial direction. An embedding groove is formed on the pressing part corresponding to the first through-hole. The valve body also includes: A sliding sleeve that can slide up and down inside the annular groove has a second through hole extending in the radial direction at the position corresponding to the first through hole, and the top end of the sliding sleeve forms a force-bearing end. The locking body is arranged in the radial direction and is inserted into the embedding groove, the first through hole and the second through hole to lock the pressing part to the valve body. The portion of the locking body inserted into the second through hole of the sliding sleeve forms the exposed force-bearing section.

5. The anti-blowout valve according to claim 4, characterized in that, The force-bearing end of the sliding sleeve is designed with a constricted opening, which can support a thrown ball.

6. The blowout preventer valve according to claim 4, characterized in that, The first perforation is an elongated hole extending upwards.

7. The blowout preventer valve according to claim 4, characterized in that, The locking body has a break line formed on it.

8. The anti-blowout valve according to claim 7, characterized in that, The section to be cut is located at the contact point between the sliding sleeve and the inner circumferential sidewall.

9. The blowout preventer valve according to claim 4, characterized in that, The valve body includes: A first housing has an upstream connection section and a downstream connection section, the upstream connection section being used to connect a tubular column; The second housing has a plug-in section and a second connecting section connected sequentially in the vertical direction. The second connecting section is fixedly connected to the downstream connecting section of the first housing, and the plug-in section extends into the interior of the first housing. The annular groove is located between the plug-in section and the first outer shell, and the plug-in section forms the inner peripheral sidewall.

10. A tubular string, characterized in that, It includes a tubing body and a blowout preventer as described in any one of claims 1-9, the blowout preventer being connected to a downstream opening of the tubing body.

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