A blowout preventer testing lift tool

Abstract

The utility model provides a blowout preventer test lifting tool belongs to oil field water well pressure test device technical field, including wellhead joint, lifting device, blowout preventer pipe and blowout preventer head, wellhead joint sets up on wellhead, sets up lifting device on wellhead joint, lifting device links with blowout preventer pipe, sets up blowout preventer head on blowout preventer pipe, the utility model designs blowout preventer pipe folding, lifting mechanism, realizes after installing blowout preventer head in the ground with test tool in blowout preventer pipe again stands up, avoids the operation risk of climbing aerial work, the utility model designs a kind of brand-new sealing mechanism, can according to downhole pressure fluctuation, through ground control to adjust the sealing performance of sealing head, realize adjusting at any time, overflow controllable, completely eliminates the operation risk of climbing aerial work, increases the length, weight limit of test tool, reduces downhole jam risk, realizes the arbitrary adjustment of blowout preventer pipe sealing head in test process, no longer repeats climbing aerial work, reduces labor intensity.

Description

Technical Field

[0001] This invention belongs to the technical field of oilfield water well pressurized testing devices, specifically relating to a blowout prevention testing lifting tool. Background Technology

[0002] The conventional method for testing water wells under pressure involves a straight blowout preventer (BOP). A BOP is installed at the top end of the wellhead. The operator needs to climb to the wellhead and then climb from the top of the wellhead to the top of the BOP. Standing on a platform fixed to the BOP, the operator raises the testing tool overhead and lowers it into the BOP from the top. After sealing the top, the wellhead valve is opened to inject water into the BOP. During this process, the operator needs to stand on the platform and adjust the tightness of the BOP seal until no water overflows and the testing tool is successfully lowered into the well. This process takes about an hour, depending on the well conditions. The above testing process has the following shortcomings: First, it requires operators to climb onto the blowout preventer (BOP) and carry tools for work at height, which increases the risk of falls and mechanical injuries. Second, the testing tools must be raised overhead and lowered into the BOP from the top, limiting the length and weight of the tools and requiring flexible connections between them, which increases the risk of jamming during well entry. Third, adjusting the BOP sealing head gap requires personnel to climb, and repeated climbing is necessary during adjustments, increasing the labor intensity. Fourth, overflow water sprays or flows along the BOP to the ground, making the entire BOP, platform, and wellhead slippery, especially in winter when it freezes, greatly increasing the difficulty of climbing and the risk of personnel slipping and falling.

[0003] Research revealed that other oilfields employ hydraulically or mechanically folded blowout preventers (BOPs). For example, existing technology CN204627509U discloses a non-climbing hydraulically installed well test BOP device. However, these devices generally suffer from drawbacks such as excessive weight and numerous complex components. Multiple assembly at the wellhead is required, and lifting often necessitates complex external electric equipment, hydraulic tools, or gear systems, resulting in long installation times, high failure rates, and high maintenance costs. Furthermore, the BOP sealing head still requires manual adjustment, necessitating repeated climbing during testing, failing to eliminate the risks of climbing and reduce labor intensity. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a blowout preventer testing lifting tool, comprising a wellhead connector, a lifting device, a blowout preventer pipe, and a blowout preventer head. The wellhead connector is disposed on the wellhead, the lifting device is disposed on the wellhead connector, the lifting device is connected to the blowout preventer pipe, and the blowout preventer head is disposed on the blowout preventer pipe.

[0005] Furthermore, the wellhead connector is provided with a lower hinge plate and a pressure relief connector, a hinge shaft is provided on the lower hinge plate, and a support shaft is installed on the lower hinge plate.

[0006] Furthermore, the lifting device includes a hydraulic cylinder, an upper hinge plate, and a lifting head. The blowout preventer is connected to the upper hinge plate, the upper hinge plate is connected to the telescopic end of the hydraulic cylinder through the lifting head, and the upper hinge plate is connected to the lower hinge plate through a hinge shaft.

[0007] Furthermore, the anti-spray head includes an anti-spray head body, and an anti-spray head top seal is provided on the anti-spray head body.

[0008] Furthermore, a pulley seat is provided on the main body of the spray nozzle, a pulley frame is provided on the pulley seat, a pulley shaft is provided on the pulley frame, and the pulley shaft is connected to the pulley through a bearing.

[0009] Furthermore, an overflow connector is provided on the main body of the nozzle.

[0010] Furthermore, a pressure regulating connector is provided on the main body of the nozzle.

[0011] Furthermore, a pressure regulating piston is provided in the middle of the nozzle body.

[0012] Furthermore, a rubber gasket is provided inside the pressure regulating piston.

[0013] Furthermore, a base is provided at the bottom of the nozzle body.

[0014] The beneficial effects of this invention are as follows: First, the design of the blowout preventer (BOP) folding and lifting mechanism allows the testing tools to be loaded into the BOP and the BOP head installed on the ground before being erected, avoiding the operational risks associated with working at height. Second, it breaks away from the existing sealing principle of BOP sealing heads and designs a completely new sealing mechanism that can adjust the sealing performance of the sealing head through ground control according to downhole pressure fluctuations, enabling real-time adjustment, controllable overflow, and eliminating the need for repeated high-altitude operations, thus ensuring safety and environmental protection.

[0015] This invention completely eliminates the operational risks associated with working at heights, increases the length and weight limits of testing tools, and reduces the risk of blockages downhole. It allows for arbitrary adjustment of the blowout preventer sealing head during testing, eliminating the need for repeated work at heights and reducing labor intensity. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the blowout prevention test lifting tool of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the tool of the present invention when it is lifted to a certain angle;

[0018] Figure 3 This is a schematic diagram of the structure of the tool of the present invention in the state of being lifted to the wellhead.

[0019] The attached diagram is labeled as follows: 1. Pulley, 2. Bearing, 3. Pulley shaft, 4. Pulley frame, 5. Blowout nozzle top seal, 6. Pulley seat, 7. Blowout nozzle body, 8. Overflow connector, 9. Pressure regulating connector, 10. Pressure regulating piston, 11. Rubber pad, 12. Base, 13. Blowout nozzle pipe, 14. Upper hinge plate, 15. Lifting head, 16. Lower hinge plate, 17. Hinge shaft, 18. Nut, 19. Support shaft, 20. Pressure relief connector. Detailed Implementation

[0020] Example 1

[0021] To make the technical means and objectives of this invention easier to understand, the invention is further described below in conjunction with specific embodiments, including a blowout prevention testing lifting tool, such as... Figure 1 As shown, it includes a wellhead connector, a lifting device, a blowout preventer pipe 13, and a blowout preventer head. The wellhead connector is installed on the wellhead, and the lifting device is installed on the wellhead connector. The lifting device is connected to the blowout preventer pipe 13, and the blowout preventer head is installed on the blowout preventer pipe 13.

[0022] The wellhead connector is provided with a lower hinge plate 16 and a pressure relief connector 20. The lower hinge plate 16 is provided with a hinge shaft 17 and a support shaft 19 is installed on the lower hinge plate 16.

[0023] The lifting device includes a hydraulic cylinder, an upper hinge plate 14 and a lifting head 15. The blowout preventer 13 is connected to the upper hinge plate 14. The upper hinge plate 14 is connected to the telescopic end of the hydraulic cylinder through the lifting head 15. The upper hinge plate 14 is connected to the lower hinge plate 16 through a hinge shaft 17.

[0024] The anti-spray head includes an anti-spray head body 7, and an anti-spray head top seal 5 is provided on the anti-spray head body 7.

[0025] The main body 7 of the anti-spray head is provided with a pulley seat 6, a pulley frame 4 is provided on the pulley seat 6, a pulley shaft 3 is provided on the pulley frame 4, and the pulley shaft 3 is connected to the pulley 1 through a bearing 2.

[0026] An overflow connector 8 is provided on the main body 7 of the anti-spray head.

[0027] The anti-spray head body 7 is provided with a pressure regulating connector 9.

[0028] The anti-spray head body 7 is provided with a pressure regulating piston 10 in the middle.

[0029] The pressure regulating piston 10 is provided with a rubber pad 11 inside.

[0030] The base 12 is provided at the bottom of the anti-spray head body 7.

[0031] Overall technical solution:

[0032] First, the power tool auxiliary system and hydraulic or gear system are eliminated. The design adopts a hinge folding mechanism, consisting of an upper hinge plate 14, a hinge shaft 17, and a lower hinge plate 16. The blowout preventer 13 is connected to the upper hinge plate 14, and the upper hinge plate 14 is connected to the lower hinge plate 16 via the hinge shaft 17. The lower hinge plate 16 is connected to the wellhead connector, which is equipped with a nut 18 that is also fitted onto the blowout preventer 13. A pressure relief connector 20 is installed on the wellhead connector. A support shaft 19 is installed on the lower hinge plate 16, and a lifting head 15 is installed on the blowout preventer 13. The upper hinge plate 14 can rotate around the hinge shaft 17. When rotating, it drives the blowout preventer 13 and all its associated components to rotate simultaneously until the blowout preventer 13 and the wellhead connector are aligned. When the upper hinge plate 14 and the blowout preventer 13 are rotated 90 degrees and placed in a horizontal position, the support shaft 19 supports the upper hinge plate 14, at which point the rotation stops. The goal is to first load the test tool into the blowout preventer 13 and install the blowout preventer head on the ground before erecting the blowout preventer.

[0033] Secondly, overflow connectors 8 and pressure regulating connectors 9 are installed on both sides of the sealing head body, and a pressure regulating piston 10 is installed in the middle of the body. A rubber gasket 11 is installed inside the pressure regulating piston 10, and a base 12 is installed at the bottom of the body. The combined components are installed on the blowout preventer 13 through the blowout preventer sealing head. According to the downhole pressure fluctuation, the internal pressure of the piston can be adjusted by surface hydraulic tools to achieve arbitrary adjustment in the middle.

[0034] Example 2

[0035] The aim is to address the shortcomings of existing technologies by adopting a simplified folding blowout preventer that eliminates the need for power tool assistance systems and hydraulic or gear systems. This allows for the testing tools to be installed into the blowout preventer and the blowout head to be installed on the ground before the blowout preventer is erected, avoiding all accidental injuries that may occur during high-altitude operations. Secondly, the overflow level of the blowout head can be adjusted manually from the ground, and adjustments can be made at any time during the process, eliminating the need for climbing. Thirdly, the overflow water will flow down along the overflow pipe, preventing pollution of the blowout preventer, wellhead, and ground, thus ensuring safety and environmental protection.

[0036] A bearing 2 is installed inside the pulley 1. The bearing 2 is connected to the pulley frame 4 via the pulley shaft 3. The pulley frame 4 is mounted on the nozzle body 7. A groove is provided on the outer circumference of the pulley 1. A nozzle top seal 5 is installed on the nozzle body 7. An overflow connector 8 and a pressure regulating connector 9 are installed on both sides of the nozzle body 7. A pressure regulating piston 10 is installed in the middle of the nozzle body 7. A rubber gasket 11 is installed inside the pressure regulating piston 10. A base 12 is installed at the bottom of the nozzle body 7. A nozzle top seal 5 is installed on the nozzle body 7. All components are assembled into a blowout preventer head. The blowout preventer head is mounted on the blowout preventer pipe 13 via the blowout preventer head body 7. The blowout preventer pipe 13 is connected to the upper hinge plate 14. The upper hinge plate 14 is connected to the lower hinge plate 16 via a hinge shaft 17. The lower hinge plate 16 is connected to the wellhead connector. A nut 18 is installed on the wellhead connector and is also fitted onto the blowout preventer pipe 13. A pressure relief connector 20 is installed on the wellhead connector. A support shaft 19 is installed on the lower hinge plate 16. A lifting head 15 is installed on the blowout preventer pipe 13.

[0037] The upper hinge plate 14 can rotate around the hinge shaft 17. When the upper hinge plate 14 rotates, it drives the blowout preventer 13 and all the components associated with the blowout preventer 13 to rotate simultaneously until the upper hinge plate 14 contacts the support shaft 19.

[0038] The upper hinge plate 14 and blowout preventer 13 can be rotated 90 degrees to be placed in a horizontal position, and the support shaft 19 will support the upper hinge plate 14, at which point the rotation stops.

[0039] The pressure relief connector 20 is equipped with a pressure relief valve.

[0040] like Figures 1-3 As shown, the workflow is as follows:

[0041] 1. The test vehicle is parked 10 meters away from the water injection well opening, with the orientation depending on the wind direction of the day, and the vehicle is positioned upwind.

[0042] 2. A wellhead connector is installed on the wellhead of the water injection well, and the connection method is a slip connection. The wellhead connector consists of a clamp head, a pressure relief connector, a lower hinge plate, and a hinge shaft.

[0043] 3. By connecting the upper hinge plate, hinge shaft, and lower hinge plate, the main body of the lifting device lies horizontally on the lower hinge plate, so that the main body of the lifting device is placed in a 90-degree horizontal position relative to the wellhead.

[0044] 4. Connect the test vehicle's steel wire rope to the main body of the spray nozzle and the test tool.

[0045] 5. After placing the connected test tool inside the lifting device body, tighten the nozzle body and the lifting device body.

[0046] 6. After tightening, place the wire rope into the outer groove of the top pulley of the lifting device.

[0047] 7. Connect the blowout preventer line and pressure regulating line to the overflow connector and pressure regulating connector of the blowout preventer head body.

[0048] 8. Connect the lever to the lifting head of the main body of the lifting device. Using the lever principle, the lifting device is rotated 90 degrees through the hinge shaft, so that the lifting device and the wellhead are in the same straight line.

[0049] 9. After erection, tighten the nuts to secure the lifting device body to the wellhead connector, and open the well gate. Adjust the pressure regulating piston inside the blowout preventer body using the ground hydraulic system to achieve a seal with the wire rope.

[0050] 10. Using the test vehicle winch, lower the test tools to test and adjust the water well.

[0051] 11. After the test is completed, remove the testing tools from the wellhead and place them inside the lifting device. Close the gate valve at the injection wellhead.

[0052] 12. Open the pressure relief connector and, after confirming that there is no pressure inside the lifting device, loosen the nut between the main body of the lifting device and the wellhead connector.

[0053] 13. Using the lifting head and lever principle, the lifting device is rotated 90 degrees via the hinge shaft to lower the lifting device.

[0054] 14. Loosen the nozzle body and take out the testing tool.

[0055] 15. Disassemble the wellhead joint and restore water injection.

[0056] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A blowout prevention testing lifting tool, characterized in that, It includes a wellhead connector, a lifting device, a blowout preventer (13) and a blowout preventer head. The wellhead connector is set on the wellhead, the lifting device is set on the wellhead connector, the lifting device is connected to the blowout preventer (13), and the blowout preventer head is set on the blowout preventer (13).

2. The blowout prevention test lifting tool as described in claim 1, characterized in that, The wellhead connector is provided with a lower hinge plate (16) and a pressure relief connector (20). A hinge shaft (17) is provided on the lower hinge plate (16), and a support shaft (19) is installed on the lower hinge plate (16).

3. The blowout prevention test lifting tool as described in claim 2, characterized in that, The lifting device includes a hydraulic cylinder, an upper hinge plate (14) and a lifting head (15). The blowout preventer (13) is connected to the upper hinge plate (14). The upper hinge plate (14) is connected to the telescopic end of the hydraulic cylinder through the lifting head (15). The upper hinge plate (14) is connected to the lower hinge plate (16) through the hinge shaft (17).

4. The blowout prevention test lifting tool as described in claim 1, characterized in that, The anti-spray head includes an anti-spray head body (7) and an anti-spray head top seal (5) is provided on the anti-spray head body (7).

5. The blowout prevention test lifting tool as described in claim 4, characterized in that, The main body (7) of the anti-spray head is provided with a pulley seat (6), a pulley frame (4) is provided on the pulley seat (6), a pulley shaft (3) is provided on the pulley frame (4), and the pulley shaft (3) is connected to the pulley (1) through a bearing (2).

6. The blowout prevention test lifting tool as described in claim 4, characterized in that, An overflow connector (8) is provided on the main body (7) of the anti-spray head.

7. The blowout prevention test lifting tool as described in claim 4, characterized in that, A pressure regulating connector (9) is provided on the main body (7) of the anti-spray head.

8. The blowout prevention test lifting tool as described in claim 7, characterized in that, A pressure regulating piston (10) is provided in the middle of the nozzle body (7).

9. The blowout prevention test lifting tool as described in claim 8, characterized in that, A rubber pad (11) is provided inside the pressure regulating piston (10).

10. The blowout prevention test lifting tool as described in claim 9, characterized in that, The bottom of the blowout head body (7) is provided with a base (12).

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