Blowout prevention test lifting tool

Abstract

The utility model relates to the technical field of oil field wellhead tools, and provides a blowout prevention test lifting tool. According to the tool, the design of a sealing pulley block at the top of the device is innovatively applied, the situation that a blowout preventer and an upper blowout preventer are installed at the top of the device is abandoned, an electric and hydraulic operation structure is abandoned, the blowout preventer and the upper blowout preventer are innovatively arranged at the bottom of the device, and ground personnel rotate the blowout preventer with the help of a pipe wrench, so that dynamic sealing of a cable can be achieved; operation is simple and direct. By means of the design, the remote control requirement and a complex anti-overflow structure are omitted, the blowout prevention system is greatly simplified, the blowout prevention effect is visible in time, and the adaptability to the complex field environment is improved by means of a pure personnel mechanical operation mode.

Description

Technical Field

[0001] The utility model relates to the technical field of oilfield wellhead tools, in particular to a blowout prevention test lifting tool. Background Art

[0002] In oilfield exploration and development, high-pressure wellhead inspection tools are crucial for assessing reservoir conditions and monitoring production status. However, traditional wellhead inspection tool operation methods have numerous drawbacks. Firstly, workers must climb 3-5 meters above the wellhead to install and debug equipment. This operation is extremely labor-intensive and carries high safety risks, making workers prone to falls and other dangerous accidents. Furthermore, the operation process is highly susceptible to weather, terrain, and other conditions. For example, in severe weather (heavy rain, strong winds, etc.) or complex terrain (mountains, swamps, etc.), the difficulty and risks of operation are further increased.

[0003] The high-pressure blowout preventer head of traditional surface testing and lifting tools is typically mounted on the top of the device. This layout results in excessively wide coverage of the contaminated liquid spray, causing significant pollution to the worksite environment. To address the inconvenience of top-mounted operation, remote control methods such as hydraulic or electric controls are often used to adjust the opening and closing of the sealing holes within the blowout preventer head. However, this approach introduces new challenges, such as delayed sealing response and inability to adjust the sealing status in a timely manner, impacting operational efficiency and safety. Furthermore, the unique location of the top makes direct observation of the sealing effect extremely difficult, hindering operators from accurately assessing the sealing status. Furthermore, to balance the need for remote control with the need for overflow prevention, current blowout preventer structures typically utilize compressed seals using flat pads, drilled holes, or O-rings. The same seal is used for both lowering and raising the cable, which can lead to severe seal wear and leaks, resulting in poor stability and a high risk of failure. Therefore, the development of a blowout preventer testing and lifting tool that can perform blowout preventer sealing operations on the surface and safely transport testing instruments down high-pressure wells in oilfields is urgently needed. Utility Model Content

[0004] The utility model aims to solve the above-mentioned technical difficulties, complete the change of pulling direction of the cable inside the device, realize the sealing of the anti-spray head to the cable by manual operation on the ground, improve the convenience of the test lifting tool, enhance the stability of the sealing structure, and then propose a blowout prevention test lifting tool.

[0005] The utility model discloses a blowout prevention test lifting tool, comprising: the sealing pulley block is connected to the connecting sleeve on the blowout preventer through the lower end interface, the sealing pulley cap is installed on the upper part, the other lower end interface is connected to the short coupling, and the lower part of the short coupling is connected to the cable pipe;

[0006] The lower part of the cable pipe is connected to the upper blowout preventer, the upper blowout preventer is threadedly connected to the blowout preventer head, and the lower part of the blowout preventer head is threadedly connected to the lower blowout preventer;

[0007] After the cable passes through the sealed pulley block, the cable changes its pulling direction inside the pipeline, so that the upper blowout preventer, the blowout preventer head, and the lower blowout preventer are moved from the top of the tool to near the ground, ensuring that personnel can complete the blowout prevention operation while standing on the ground.

[0008] The blowout preventer is connected to the connecting pipe through a pipe coupling, a ground pulley is welded on the connecting pipe, a retaining ring at the bottom of the connecting pipe and a retaining ring at the top of the seat coupling are threaded together to achieve fastening and separation with the connecting seat, wherein the steel sheet welded to the connecting seat and the steel sheet welded to the connecting pipe are hinged through a support hinge shaft, and the connecting seat is installed on the upper part of the pressure relief seat provided with a pressure relief valve;

[0009] The anti-blowout pipe, the cable pipe and the lever are clamped together by the assembled split clamp, and the ring of the lever is connected to the draw rope.

[0010] Compared with the prior art, the present invention has the following significant beneficial effects:

[0011] A top-sealed pulley design places the blowout preventer and upper blowout preventer at the bottom of the unit, allowing dynamic sealing of the blowout preventer and cable to be accomplished directly from the ground. This eliminates the need for operators to climb to heights, reducing the risks of working at height. This also eliminates the need for remote control and the complex design of overflow prevention structures, simplifying the blowout prevention system, making the operation more intuitive and efficient, and providing immediate visibility of the blowout prevention results.

[0012] This device abandons the complex configuration of electric and hydraulic systems and adopts a purely human-mechanical operation mode. This operation mode is not affected by factors such as power supply and hydraulic system failure. It is suitable for various complex and changing field operation environments, such as remote mountainous areas, deserts and other areas with inadequate power facilities, and improves the reliability and flexibility of operations.

[0013] The concave and convex parts of the concave rubber rings in the upper and lower blowout preventers are matched with the gaskets, and the blowout preventer is compressed to make the edge of the concave rubber ring fit the cable. By rotating the blowout preventer to selectively compress the upper and lower blowout preventers, the notch of the compressed concave rubber ring is aligned with the direction of cable movement, reducing friction on the cable. At the same time, the pressure difference in the pipe acts on the edge of the notch of the concave rubber ring, making the edge of the notch fit the cable more closely, which can improve the sealing effect of the rubber ring on the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0015] Figure 1This is a schematic diagram of the structure of a blowout prevention test lifting tool;

[0016] Figure 2 A top view of a sealed pulley assembly structure for a blowout prevention test lifting tool;

[0017] Figure 3 A top view of the split clamp structure of a blowout prevention test lifting tool;

[0018] Figure 4 A schematic diagram of a blowout prevention test lifting tool structure is shown;

[0019] Figure 5 This is a schematic diagram of the blowout prevention structure of a blowout prevention test lifting tool.

[0020] Description of reference numerals:

[0021] 1. Pressure relief seat; 2. Connecting seat; 3. Seat coupling; 4. Connecting pipe; 5. Pipe coupling; 6. Split clamp; 7. BOP; 8. Connecting sleeve; 9. Sealing pulley cap; 10. Sealing pulley block; 11. Short coupling; 12. Cable pipe; 13. Upper blowout preventer; 14. Sprinkler head; 15. Ground pulley; 16. Pull rope; 17. Support hinge shaft; 18. Lever; 19. Cable; 20. Lower blowout preventer; 21. Inspection tool.

[0022] 101. Pressure relief valve; 601. Clamp A; 602. Clamp B; 603. Bolt; 604. Nut; 1001. Sealing pulley; 1002. Pressure cap A; 1003. Pressure cap B; 1004. Bearing A; 1005. Axle pin; 1006. Bearing B; 1007. Pulley seat cylinder body; 1301. Convex ring gasket; 1302. Concave ring rubber ring; 1303. Concave ring gasket. DETAILED DESCRIPTION

[0023] The following will be closely combined with the embodiments of the present invention to provide a comprehensive, clear, and complete description of the technical solutions in the embodiments of the present invention. It should be understood that the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are included in the scope of protection of the present invention.

[0024] In the description of this utility model, it is important to note that terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are used solely to facilitate the description of this utility model and simplify the description. They in no way indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, in actual application, these terms should not be construed as limiting this utility model.

[0025] Example

[0026] like Figure 1-5 As shown, a blowout prevention test lifting tool includes: a sealed pulley block 10, which is connected to the connecting sleeve 8 on the blowout preventer 7 through a lower end interface, a sealed pulley cap 9 is installed on the upper part, and the other lower end interface is connected to a short coupling 11. The lower part of the short coupling 11 is connected to a cable tube 12, so that the cable 19 completes a 180° direction change in the sealed space inside the tool. A sealed pulley 1001 is installed inside the sealed pulley block 10, and an axle pin 1005 is passed through the center of the sealed pulley 1001. The two ends of the axle pin 1005 are respectively sleeved with bearings A1004 and bearing B1006, and then placed in a groove of a pulley seat cylinder body 1007. Pressing caps A1002 and B1003 are pressed into the groove and fixed by bolts.

[0027] After the cable 19 passes through the sealing pulley block 10, the cable 19 changes the pulling direction inside the pipeline, so that the upper blowout preventer 13, the blowout preventer head 14 and the lower blowout preventer 20 are moved from the top of the tool to near the ground, ensuring that the personnel can complete the blowout prevention operation while standing on the ground.

[0028] The blowout preventer 7 is connected to the connecting pipe 4 through a pipe coupling 5. A ground pulley 15 is welded to the connecting pipe 4. The lower retaining ring of the connecting pipe 4 and the upper retaining ring of the seat coupling 3 are threaded together to achieve fastening and separation with the connecting seat 2. The steel sheet welded to the connecting seat 2 and the steel sheet welded to the connecting pipe 4 are hinged through a support hinge shaft 17. The connecting seat 2 is installed on the upper part of the pressure relief seat 1 provided with a pressure relief valve 101;

[0029] The lower part of the cable pipe 12 is connected to the upper blowout preventer 13, and the upper blowout preventer 13 is threadedly connected to the blowout preventer head 14. The lower part of the blowout preventer head 14 is threadedly connected to the lower blowout preventer 20. The internal accessories of the upper blowout preventer 13 are, from top to bottom, a convex ring gasket 1301, a concave ring rubber ring 1302 and a concave ring gasket 1303. The internal accessories of the lower blowout preventer 20 are mirror images of the internal accessories of the upper blowout preventer 13. The blowout preventer head 14 selectively compresses the concave ring rubber rings 1302 inside the upper blowout preventer 13 and the lower blowout preventer 20 according to the moving direction of the cable 19, so that the recess of the selected compressed concave ring rubber ring 1302 is consistent with the moving direction of the cable 19, thereby reducing friction on the cable. At the same time, the pressure difference in the pipe acts on the edge of the recess of the concave ring rubber ring 1302, so that the edge of the recess fits the cable 19 more closely, thereby improving the sealing effect of the rubber ring on the cable 19;

[0030] The lubricator 7, the cable tube 12, and the lever 18 are clamped together by the assembled split clamp 6. The split clamp 6 consists of a clamp A601 and a clamp B602 designed with mirror-image clamp grooves. The clamp is tightened by inserting a bolt 603 and a nut 604 through the clamp hole. The loop of the lever 18 is connected to the pull rope 16 to realize the opening and closing of the upper half of the manual control device, which facilitates the fixing of the cable tube 12 and the installation and removal of the detection tool 21 and the cable 19.

[0031] The lubricator 7 and the connecting sleeve 8 are made of titanium alloy TA3, which makes the upper parts lightweight and facilitates manual opening and closing operations;

[0032] The cross section of the concave rubber ring 1302 is arc-shaped, and the overall shape presents a curved profile with a downward concave middle portion and upwardly curved inner and outer edges.

[0033] See Figure 1-5 The specific working principle of this embodiment is as follows:

[0034] Preparation stage:

[0035] First, the staff removes the support hinge shaft 17 and uses a wrench to loosen the seat coupling 3 to separate the connecting seat 2 and the connecting pipe 4, dividing the device into two parts to facilitate subsequent installation operations. This step creates favorable conditions for the insertion of the cable 19 and the installation of the detection tool 21.

[0036] Closing the wellhead Christmas tree valve is a key step to ensure safe operation, preventing high-pressure liquid and gas in the oil well from spraying out during the installation process and ensuring the safety of operators.

[0037] After the hinge shaft 17 is installed, the upper part of the device is in a horizontal open state, which provides ample operating space for the insertion of the cable 19 and the installation of the detection tool 21.

[0038] The cable 19 is passed along the correct path, close to the ground pulley 15, and slowly inserted into the lower blowout preventer 20, ensuring that it passes through the seat coupling 3, and then connected to the detection tool 21. After the connection is completed, the cable 19 is tightened, and the detection tool 21 is smoothly sent into the lubricator 7 and fixed, ensuring that the detection tool 21 will not shake or fall off during subsequent operations.

[0039] Finally, pull the pull rope 16 to gradually turn the upper part of the device from the horizontal open state to the vertical ground state, and then use a wrench to tighten the seat coupling 3 to achieve a sealed connection between the connecting seat 2 and the connecting pipe 4. After confirming that all connection parts are firm and well sealed, the preparation work is completed and full preparation is made for subsequent inspection operations.

[0040] Detection phase:

[0041] When the wellhead Christmas tree valve is opened, high-pressure liquid and gas from the oil well gradually enter the blowout preventer test lift tool, causing the internal pressure to rise. Workers closely monitor the status of the blowout preventer 14. If any leakage is detected, they immediately use a wrench to rotate the blowout preventer 14.

[0042] By rotating the blowout preventer 14, the concave rubber ring 1302 of the upper blowout preventer 13 is compressed, achieving a dynamic seal between the upper blowout preventer 13 and the cable 19. After ensuring a good seal, the cable 19 is lowered, and the inspection tool 21 connected to the end of the cable 19 is then inserted into the oil pipe to start the inspection operation.

[0043] During the inspection process, the inspection tool 21 collects various data from the oil well in real time, such as pressure, temperature, and flow rate, and transmits the data to surface monitoring equipment via cable 19. Ground personnel monitor this data in real time and adjust inspection parameters in a timely manner based on data changes to ensure smooth inspection operations.

[0044] Ending stage:

[0045] After the inspection is complete, the blowout preventer 14 and lower blowout preventer 20 are rotated, compressing the concave rubber ring 1302 of the lower blowout preventer 20 and releasing the concave rubber ring 1302 of the upper blowout preventer 13. The operator then tightens the cable 19 and steadily lifts the inspection tool 21 into the lubricator 7. The wellhead tree valve is closed to prevent further liquid and gas from entering the tool. The pressure relief valve 101 is operated to release pressure, slowly discharging the high-pressure gas and liquid inside the tool and reducing the internal pressure to a safe level. After pressure relief is complete, the seat coupling 3 is loosened, and the upper half of the device is opened and leveled using the control lever 18 and pull rope 16. The inspection tool 21 is removed, the cable 19 is disconnected from the inspection tool 21, and the cable 19 is withdrawn from the tool. The hinge shaft 17 is removed, the pressure relief seat 1 on the wellhead tree is disassembled, the work site is cleaned and reorganized, and the pipeline is restored to its original state. The single-well operation is now complete.

[0046] The above detailed descriptions of certain exemplary embodiments of the present invention are provided. Those skilled in the art will appreciate that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and description are illustrative in nature and should not be construed as limiting the scope of the claims of the present invention.

Claims

1. A blowout prevention test lifting tool, characterized in that: include: A sealed pulley block (10), wherein the sealed pulley block (10) is connected to the connecting sleeve (8) on the blowout preventer (7) through a lower end interface, a sealed pulley cap (9) is installed on the upper part, and the other lower end interface is connected to a short coupling (11), and the lower part of the short coupling (11) is connected to a cable tube (12), so that the cable (19) completes a 180° direction change in the sealed space inside the tool, and a sealed pulley (1001) is installed inside the sealed pulley block (1001), and an axle pin (1005) is passed through the center of the sealed pulley (1001), and bearings A (1004) and bearings B (1006) are respectively sleeved at both ends of the axle pin (1005) and then placed in a groove of the pulley seat cylinder (1007), and pressure caps A (1002) and pressure caps B (1003) are pressed into the groove and fixed by bolts; After the cable (19) passes through the sealing pulley block (10), the cable (19) changes the pulling direction inside the pipeline, so that the positions of the upper blowout preventer (13), the blowout preventer head (14) and the lower blowout preventer (20) are moved from the top of the tool to a design close to the ground, ensuring that personnel can complete the blowout prevention operation while standing on the ground.

2. A blowout prevention test lifting tool according to claim 1, characterized in that: The lower part of the cable pipe (12) is connected to the upper blowout preventer (13), the upper blowout preventer (13) is threadedly connected to the blowout preventer head (14), and the lower part of the blowout preventer head (14) is threadedly connected to the lower blowout preventer (20). The internal accessories of the upper blowout preventer (13) are, from top to bottom, a convex ring gasket (1301), a concave ring rubber ring (1302), and a concave ring gasket (1303). The internal accessories of the lower blowout preventer (20) are mirror images of the internal accessories of the upper blowout preventer (13). The blowout preventer head (14) selectively compresses the concave ring rubber ring (1302) inside the upper blowout preventer (13) and the lower blowout preventer (20) according to the moving direction of the cable (19), so that the notch of the compressed concave ring rubber ring (1302) is consistent with the moving direction of the cable (19).

3. A blowout prevention test lifting tool according to claim 1, characterized in that: The blowout preventer (7) is connected to the connecting pipe (4) through a pipe coupling (5), a ground pulley (15) is welded on the connecting pipe (4), and a lower retaining ring of the connecting pipe (4) and an upper retaining ring of the seat coupling (3) are threadedly matched to achieve fastening and separation with the connecting seat (2), wherein the steel sheet welded to the connecting seat (2) and the steel sheet welded to the connecting pipe (4) are hinged through a support hinge shaft (17), and the connecting seat (2) is installed on the upper part of the pressure relief seat (1) provided with a pressure relief valve (101).

4. A blowout prevention test lifting tool according to claim 1, characterized in that: The blowout preventer (7) is clamped together with the cable tube (12) and the lever (18) by the assembled split clamp (6). The split clamp (6) is composed of a clamp A (601) and a clamp B (602) designed with mirror-image clamp grooves. The clamp is locked by inserting a bolt (603) and a nut (604) through a hole in the clamp. The loop of the lever (18) is connected to the pull rope (16), thereby realizing the opening and closing action of the upper part of the manual control device.

5. A blowout prevention test lifting tool according to claim 1, characterized in that: The lubricator (7) and the connecting sleeve (8) are made of titanium alloy TA3.

6. A blowout prevention test lifting tool according to claim 2, characterized in that: The concave rubber ring (1302) has an arc-shaped cross section, and its overall shape presents a curved profile with a downward depression in the middle and upward curling of the inner and outer edges.

Images