A wellhead reset device and wellhead reset system

Abstract

The application discloses a wellhead resetting device, which comprises a chassis vehicle, an extendable track and a six-degree-of-freedom platform; a track support is arranged on the chassis vehicle, the extendable track is arranged on the track support, and an extendable track driving system drives the extendable track to move horizontally on the track support; a chain and a chain driving system are arranged in the extendable track, the chain driving system drives the chain to rotate in the moving direction of the extendable track; the six-degree-of-freedom platform is connected with the chain, and a clamping device is arranged on the top of the six-degree-of-freedom platform. The wellhead resetting device and the wellhead resetting system can improve the reliability of the device and ensure the safe and reliable installation of a new blowout preventer.

Description

Technical Field

[0001] This invention relates to a wellhead reset device and a wellhead reset system, belonging to the technical field of pressurized reset installation equipment. Background Technology

[0002] During oil and gas field development, blowout preventers (BOPs) may fail, leading to uncontrolled blowouts. The area around the wellhead may be filled with large amounts of flammable gas or flames, making it impossible for personnel to approach. The usual practice is to remove the old BOP, with or without flames, and install a new one. Typically, after wellhead cutting, an induction tube is installed to introduce flames into the air, allowing personnel to approach and clean the cut wellhead. Depending on the extent of damage to the wellhead flanges, the option is to replace them all or use the original flanges.

[0003] After repairing or replacing the wellhead flange, personnel evacuate. The new blowout preventer (BOP) is hoisted into place, aligned with the flange, and downward pressure is applied. Once the flange face is sealed, the bolts are connected. Through the new BOP's drainage system, the BOP is gradually shut off to extinguish the wellhead fire and control the blowout. This completes the well shut-in operation.

[0004] Currently, the installation of new blowout preventers (BOPs) typically involves using a long-arm crane for hoisting or employing a CN206429214U structure combined with a CN213116221U guide installation. Firstly, both of these methods utilize cantilever structures, which suffer from poor stability, low load-bearing capacity, poor alignment, and long installation times. Secondly, the power source moves close to the wellhead along with the working machine, making it prone to power failure. Furthermore, it can easily ignite unburned blowout gas, causing flashover and threatening the safety of personnel and property over a significant area.

[0005] In summary, the current wellhead resetting device has limited application, limited ability to carry blowout preventer (BOP) assembly, low success rate of wellhead resetting, long time consumption, and high risk. Summary of the Invention

[0006] The purpose of this invention is to provide a wellhead resetting device and a wellhead resetting system to address the aforementioned problems; these devices can improve reliability and ensure safe and reliable installation of new blowout preventers.

[0007] The technical solution adopted in this invention is as follows:

[0008] A wellhead resetting device includes a chassis vehicle, a telescopic track, and a six-degree-of-freedom platform;

[0009] The chassis is equipped with a rail support, and the telescopic rail is mounted on the rail support. The telescopic rail drive system drives the telescopic rail to move horizontally on the rail support.

[0010] A chain and a chain drive system are installed inside the telescopic track, and the chain drive system drives the chain to rotate along the moving direction of the telescopic track;

[0011] The six-degree-of-freedom platform is connected to the chain, and a clamping device is provided on the top of the six-degree-of-freedom platform.

[0012] In this invention, the chassis vehicle adopts the existing chassis vehicle technology, and the six-degree-of-freedom platform has six motion cylinders. The six motion cylinders drive the clamping device at the top to move in six degrees of freedom in space. When a new blowout preventer (BOP) needs to be installed, the clamping device clamps the new BOP, so the six-degree-of-freedom platform can drive the new BOP to move in six degrees of freedom in space. The chassis vehicle is controlled to move towards the wellhead. When the chassis vehicle reaches a certain distance from the wellhead, it stops moving. The telescopic track drive system is controlled to drive the telescopic track to move towards the wellhead. After reaching the position, the chain drive system is controlled to drive the chain to rotate, thereby driving the six-degree-of-freedom platform to move. The six-degree-of-freedom platform carries the BOP to above the wellhead. The BOP is lowered by the six-degree-of-freedom platform, so that the BOP is connected to the wellhead flange. At this time, the six-degree-of-freedom platform is controlled to apply downward pressure. After the BOP steel ring is inserted into the groove, no flame is emitted from the lower part. The temperature is relatively low, and personnel can approach to tighten the bolts. The equipment is then disengaged and evacuated, thus realizing the installation of the BOP.

[0013] Preferably, protective boxes are provided on both sides of the track support, the telescopic track drive system is located inside the protective boxes, a first roller is provided on the track support, a second roller is provided on the protective boxes, and the second roller is located above the telescopic track.

[0014] In the above scheme, the first roller makes it easier for the telescopic track to move on the track support, and the flanges of the first and second rollers restrict the direction of movement of the telescopic track. At the same time, protective boxes are set on both sides of the telescopic track to protect the telescopic track drive system, and by setting the second roller facing upwards on the telescopic track, the telescopic track can be restricted from above, making the telescopic track more stable.

[0015] Preferably, racks are provided on both outer sides of the telescopic track, and the telescopic track drive system is connected to gears, with the racks matching the gears.

[0016] In the above scheme, the gear is driven to rotate by the telescopic track drive system. As the gear rotates, it drives the telescopic track, which is fixedly connected to the rack, to move. The direction of movement of the telescopic track can be controlled by controlling the direction of gear rotation.

[0017] Preferably, the end of the telescopic track is provided with a support leg and a support leg cylinder for controlling the extension and retraction of the support leg.

[0018] In the above scheme, setting outriggers for support can increase the stability of the six-degree-of-freedom platform during operation. At the same time, the extension and retraction of the outriggers are controlled by outrigger cylinders to adapt to uneven ground and increase the stability of the device.

[0019] Preferably, the number of chains is at least two, and the chains are arranged in parallel within the telescopic track.

[0020] Preferably, the six-degree-of-freedom platform includes a track vehicle, hydraulic cylinders, and a clamping device. There are six hydraulic cylinders, and both ends of each hydraulic cylinder are hinged to the track vehicle and the clamping device, respectively.

[0021] Preferably, the bottom of the railcar is provided with a connecting frame, and the connecting frame is provided with a connector with a pin hole; the chain is provided with a docking part with a pin hole; the connecting part and the docking part are connected by a pin shaft.

[0022] In the above scheme, the position of the connecting frame matches the position of the chain, and the connecting parts and the docking parts are connected by pins, thereby connecting the six-degree-of-freedom platform to the chain.

[0023] Preferably, the bottom of the track vehicle is provided with a third roller, and the two inner sides of the telescopic track are provided with grooves extending along the moving direction, and the third roller can be placed in the grooves.

[0024] In the above scheme, by placing the third roller into the chute to cooperate with it, the railcar can move under the drive of the chain.

[0025] Preferably, the clamping device has an inverted conical inner hole.

[0026] In the above scheme, the inverted conical inner hole facilitates the clamping of the ignition tube.

[0027] Preferably, the clamping device includes a first clamping part and a second clamping part, the first clamping part and the second clamping part forming an inverted conical inner hole and connected by a locking buckle, and the first clamping part and the second clamping part being respectively connected to the three motion cylinders.

[0028] Preferably, the locking buckle is a spring-loaded locking pin, which facilitates the release of the first clamping part and the second clamping part by pulling the locking pin.

[0029] In the above scheme, the first clamping part and the second clamping part cooperate to facilitate clamping, and after the new blowout preventer is installed, the ignition tube can be released and the user can evacuate.

[0030] Preferably, the system also includes a cooling system and a power source. The cooling system connects the components through a pipeline system, and the power source connects the telescopic track drive system, the chain drive system, and the six-degree-of-freedom platform through a pipeline system.

[0031] In the above scheme, the power source is a hydraulic power source that is connected to the hydraulic power pipeline in the pipeline system to provide power to the components in the reset device that require hydraulic power; the cooling system is connected to the cooling point in the reset device through the cooling water pipeline in the pipeline system. The cooling point can be set at a suitable location according to the needs of the device, so that the reset device does not need the protection of an external fire monitor.

[0032] Preferably, the telescopic track drive system and the chain drive system are hydraulic motors.

[0033] Preferably, the surface of the wellhead resetting device is provided with a heat-insulating coating and a protective armor.

[0034] In the above scheme, the wellhead reset device is protected by setting up a heat insulation coating and a protective armor.

[0035] A wellhead reset system includes the aforementioned wellhead reset device, a ignition tube, and a blowout preventer, wherein the ignition tube is connected to the blowout preventer, and the clamping device clamps the ignition tube.

[0036] In this invention, the installation of the new blowout preventer is completed by using a resetting device to clamp the ignition tube and the new blowout preventer.

[0037] Preferably, the ignition tube includes a detachable upper section and a lower section, wherein the upper section is provided with a clamping surface that matches the clamping device, and a pressure plate is provided below the clamping surface.

[0038] In the above scheme, the upper and lower sections of the ignition tube are connected by a flange. The lower section of the ignition tube is then connected to the blowout preventer (BOP). Different lower sections of the ignition tube can be selected to match different BOPs without replacing the entire ignition tube, enabling the installation of various BOP combinations. Simultaneously, the clamping surface of the upper section of the ignition tube cooperates with the clamping device to ensure clamping stability. Furthermore, the clamping surface can be an inverted conical clamping surface that cooperates with the clamping device. Additionally, through the lower pressure plate, when the BOP is pressed down in six-degree-of-freedom control, the downward pressure can be transmitted to the BOP, ensuring the downward pressure intensity.

[0039] Preferably, a positioning guide device is connected below the blowout preventer, and the positioning guide device includes a conical section and a straight section from bottom to top.

[0040] Preferably, the positioning guide device is provided with bolt holes that match the wellhead flange, and multiple mounting holes are provided on the side of the positioning guide device to facilitate bolt installation.

[0041] In the above scheme, the wellhead flange is guided into the conical section to align the wellhead flange with the center of the positioning and guiding device, and then the wellhead flange enters the straight section to achieve guidance and centering.

[0042] Preferably, the positioning and guiding device is equipped with a coordinate sensor, and the telescopic track is equipped with a camera. The coordinate sensor and the camera are connected to the control system.

[0043] In the above scheme, by observing the video information transmitted back by the camera through the control system, it can be ensured that the chassis vehicle reaches the designated position. By comparing the coordinates transmitted back by the coordinate sensor with the coordinates collected when cutting the old blowout preventer, it can be ensured that the new blowout preventer reaches directly above the wellhead flange.

[0044] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0045] 1. The telescopic track transport of the blowout preventer is closer to the wellhead, allowing the device itself to be further away from the flames at the wellhead, which is more conducive to equipment protection and improves the reliability of the blowout preventer installation.

[0046] 2. The telescopic track has a frame structure, avoiding cantilever, with higher rigidity, greater stability, and larger load capacity, and is suitable for larger weight and size blowout preventers;

[0047] 3. The adoption of a six-degree-of-freedom platform enables precise adjustment of multiple degrees of freedom, making the installation of the blowout preventer more efficient;

[0048] 4. By using the coordinates collected during the cutting stage, remote control can be achieved through the combined action of coordinate sensors, video monitoring, and positioning guidance devices, reducing the risk to personnel safety and improving the efficiency and reliability of installation.

[0049] 5. Equipped with a cooling system, it eliminates the need for external fire monitors, reducing reliance on personnel and external equipment. Attached Figure Description

[0050] The present invention will be described by way of example and with reference to the accompanying drawings, wherein:

[0051] Figure 1 This is a schematic diagram of the wellhead reset device;

[0052] Figure 2 This is a schematic diagram of a telescopic track drive system driving a telescopic track;

[0053] Figure 3 yes Figure 1 Schematic diagram of the mid-chain drive system;

[0054] Figure 4 This is a schematic diagram of the telescopic rails on the chassis vehicle;

[0055] Figure 5 It is a side view of the chassis and telescopic rails;

[0056] Figure 6 It is a front sectional view of the chassis and track support;

[0057] Figure 7 This is a schematic diagram of a six-degree-of-freedom platform;

[0058] Figure 8 This is a schematic diagram of a ignition tube;

[0059] Figure 9 This is a schematic diagram of a positioning and guiding device;

[0060] Figure 10 This is a schematic diagram of the wellhead reset device with a power source;

[0061] Figures 11-17 This is a schematic diagram of the wellhead reset device resetting the blowout preventer.

[0062] In the diagram, the markings are: 1-chassis vehicle, 2-telescopic track, 3-six-degree-of-freedom platform, 4-ignition tube, 5-blowout preventer, 6-chain, 7-positioning and guiding device, 8-cooling system, 9-power source, 10-pipeline system, 11-track support, 12-protective box, 13-first roller, 14-second roller, 15-coordinate sensor, 16-camera, 2a-telescopic track drive system, 21-gear, 22-rack, 23-slide groove, 24-... - outrigger, 25- outrigger cylinder, 31- clamping device, 311- first clamping part, 312- second clamping part, 313- inner hole, 314- locking buckle, 32- railcar, 33- motion cylinder, 34- third roller, 35- connecting frame, 36- connecting piece, 41- upper section of ignition tube, 42- lower section of ignition tube, 43- clamping surface, 44- pressure plate, 6a- chain drive system, 61- docking piece, 71- bolt hole, 72- mounting hole. Detailed Implementation

[0063] All features disclosed in this specification, or steps in all methods or processes disclosed herein, may be combined in any way, except for mutually exclusive features and / or steps.

[0064] Any feature disclosed in this specification, unless otherwise stated, may be replaced by other equivalent or similar features. That is, unless otherwise stated, each feature is merely one example of a series of equivalent or similar features.

[0065] Example 1

[0066] like Figure 1 As shown, a wellhead resetting device according to this embodiment includes a chassis vehicle 1, a telescopic track 2, and a six-degree-of-freedom platform 3;

[0067] like Figure 4-5As shown, a tracked chassis 1 is equipped with a track support 11, and protective boxes 12 are installed on both sides of the track support 11. A telescopic track 2 is installed on the track support 11 between the two protective boxes 12; racks 22 are installed on the outer sides of the telescopic track 2, as shown. Figure 2 The hydraulic motor-type telescopic track drive system 2a, which is installed in the protective box 12, is connected to the gear 21 that matches the rack 22. The telescopic track drive system 2a drives the gear 21 to rotate, thereby driving the telescopic track 2 to move horizontally on the track support 11.

[0068] like Figure 3-4 As shown, a hydraulic motor-type chain drive system 6a and two chains 6 in the same direction as the telescopic track 2 are installed inside the telescopic track 2. The chains 6 are located on the two inner sides of the telescopic track 2. The chains 6 are equipped with docking parts 61 with pin holes. The chain drive system 6a drives the chains 6 to rotate.

[0069] like Figure 7 As shown, the six-degree-of-freedom platform 3 includes a track car 32, motion cylinders 33, and a clamping device 31. There are six motion cylinders 33, and both ends of the motion cylinders 33 are hinged to the track car 32 and the clamping device 31, respectively. A connecting frame 35 is provided at the bottom of the track car 32. A connecting piece 36 with a pin hole is provided on the connecting frame 35. The connecting piece 36 is matched with the docking piece 61 on the chain 6 and fixed by a pin shaft, so that the six-degree-of-freedom platform 3 is connected to the chain 6, and then the six-degree-of-freedom platform 3 is moved on the telescopic track 2 by the chain 6. The clamping device 31 includes a first clamping part 311 and a second clamping part 312 connected by a locking buckle 314. The first clamping part 311 and the second clamping part 312 form an inverted conical inner hole 313 for clamping the new blowout preventer 5. The first clamping part 311 and the second clamping part 312 are respectively connected to three motion cylinders 33.

[0070] Example 2

[0071] This embodiment is based on embodiment 1, such as... Figure 4 As shown, a support leg 24 and a support leg cylinder 25 for controlling the extension and retraction of the support leg 24 are provided at the end of the telescopic track 2, which can increase the stability of the six-degree-of-freedom platform 3 during operation and adapt to uneven ground, thereby increasing the stability of the device.

[0072] like Figure 5 As shown, a first roller 13 is provided on the track support 11, and a second roller 14 is provided on the protective box 12. The second roller 14 is located above the telescopic track 2 to facilitate the movement of the telescopic track 2 and make the movement of the telescopic track 2 more stable.

[0073] Slide grooves 23 extending along the moving direction are provided on both inner sides of the telescopic track 2. A third roller 34 is provided at the bottom of the track vehicle 32. The third roller 34 is placed in the slide groove 23. The cooperation between the third roller 34 and the slide groove 23 facilitates the movement of the track vehicle 32 on the telescopic track 2.

[0074] like Figure 9 As shown, a positioning guide device 7 is connected below the blowout preventer 5. The positioning guide device 7 includes a conical section and a straight section from bottom to top. The positioning guide device 7 is provided with bolt holes 71 that match the wellhead flange. Multiple mounting holes 72 are provided on the side of the positioning guide device 7. The wellhead flange is guided into the conical section to align the center of the wellhead flange with the center of the positioning guide device 7. Then the wellhead flange enters the straight section to achieve centering.

[0075] Example 3

[0076] This embodiment is based on embodiment 1 or embodiment 2, such as Figure 10 As shown, it also includes a cooling system 8 and a power source 9. The cooling system 8 is connected to the cooling point in the device through the cooling water pipeline in the pipeline system 10. The cooling point can be set in a suitable location according to the needs of the device, so that the reset device does not need the protection of an external fire monitor. The hydraulic power source 9 is connected to the telescopic track drive system 2a, chain drive system 6a, six-degree-of-freedom platform 3 and chassis vehicle 1, etc., which require hydraulic power, through the hydraulic power pipeline in the pipeline system 10 to provide them with power. A heat insulation coating and protective armor are provided on the surface of the wellhead reset device for protection.

[0077] Example 4

[0078] A wellhead reset system according to this embodiment includes the wellhead reset device, a ignition tube, and a blowout preventer, wherein the ignition tube is connected to the blowout preventer, and the clamping device clamps the ignition tube.

[0079] like Figure 8 As shown, the ignition tube 4 includes an upper section 41 and a lower section 42 connected by a flange. The lower section 42 is connected to the blowout preventer 5 and can be replaced to match different blowout preventers 5. The upper section 41 is provided with an inverted conical clamping surface 43 that matches the inner hole 313. The clamping device 31 clamps the blowout preventer 5 through the clamping surface 43. A pressure plate 44 is provided below the clamping surface 43. When it is necessary to press down the blowout preventer 5, the pressure plate 44 can transmit the downward pressure to the blowout preventer 5 to ensure the pressure level.

[0080] like Figure 1As shown, a coordinate sensor 15 is installed on the positioning and guiding device, and a camera 16 is installed on the telescopic track. The coordinate sensor 15 and the camera 16 are connected to the control system. By observing the video information transmitted back by the camera 16 through the control system, it can be ensured that the chassis vehicle 1 reaches the designated position. The coordinates transmitted back by the coordinate sensor 15 are compared with the coordinates collected when cutting the old blowout preventer to ensure that the new blowout preventer 5 reaches directly above the wellhead flange.

[0081] The process for installing the new blowout preventer 5 is as follows: Figure 11-12 As shown, the ignition tube 4 is first connected to the blowout preventer 5, and the six-degree-of-freedom platform 3 clamps the ignition tube 4 through the clamping device 31; as Figure 13 As shown, control the chassis vehicle 1 to move towards the wellhead, and stop moving when the chassis vehicle 1 reaches a certain distance from the wellhead; as Figure 14 As shown, the telescopic track 2 is controlled to move towards the wellhead, and after reaching the position, the outriggers 24 are adjusted to maintain stability; as Figure 15 As shown, the drive chain 6 rotates, thereby moving the six-degree-of-freedom platform 3 towards the wellhead, causing the six-degree-of-freedom platform 3 to carry the blowout preventer 5 to above the wellhead; as Figure 16 As shown, the blowout preventer (BOP) 5 is lowered via the six-degree-of-freedom platform 3, allowing it to dock with the wellhead flange. At this point, the six-degree-of-freedom platform 3 continues to apply downward pressure. No flame is emitted from the lower part of the BOP 5 steel ring as it enters the groove. Personnel approach and tighten the bolts to reset the BOP 5. Figure 17 As shown, the clamping device 31 disengages from the blowout preventer 5, and the chassis vehicle 1 is removed.

[0082] This invention is not limited to the specific embodiments described above. The invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A wellhead resetting device, characterized in that: Includes chassis, telescopic rails, and a six-degree-of-freedom platform; The chassis is equipped with a track support, and a telescopic track with a length greater than the length of the chassis is mounted on the track support. A telescopic track drive system drives the telescopic track to move horizontally on the track support so that the telescopic track extends beyond the vehicle body to the front and / or rear. Protective boxes are provided on both sides of the track support, and the telescopic track drive system is located inside the protective boxes. A first roller is mounted on the track support, and a second roller is mounted on the protective boxes. The second roller is located above the telescopic track, and the flanges of the first and second rollers restrict the movement direction of the telescopic track. A chain and a chain drive system are installed inside the telescopic track, and the chain drive system drives the chain to rotate along the moving direction of the telescopic track; The six-degree-of-freedom platform is connected to the chain, and a clamping device is provided on the top of the six-degree-of-freedom platform. The six-degree-of-freedom platform includes a railcar, motion cylinders, and a clamping device. There are six motion cylinders, and both ends of the motion cylinders are hinged to the railcar and the clamping device, respectively. A third roller is also provided at the bottom of the railcar. The two inner sides of the telescopic track are provided with grooves extending along the moving direction. The third roller is placed in the groove to cooperate with it, which facilitates the movement of the railcar driven by the chain. The clamping device includes a first clamping part and a second clamping part. The first clamping part and the second clamping part form an inverted conical inner hole for clamping the ignition tube. The number of chains is at least two, and the chains are arranged parallel to each other in the telescopic track. The chains are provided with docking parts with pin holes. The bottom of the track vehicle is provided with a connecting frame, and the connecting frame is provided with a connecting part with pin holes. The connecting part and the docking part are connected by a pin shaft, so that the six-degree-of-freedom platform is connected to the chains.

2. The wellhead reset device as described in claim 1, characterized in that: Racks are provided on both outer sides of the telescopic track, and the telescopic track drive system is connected to gears, with the racks matching the gears.

3. The wellhead reset device as described in claim 1, characterized in that: The telescopic track is provided with support legs and support leg cylinders for controlling the extension and retraction of the support legs at its ends.

4. The wellhead reset device as described in claim 1, characterized in that: The inner holes of the first clamping part and the second clamping part are connected by a locking buckle, and the first clamping part and the second clamping part are respectively connected to the three motion cylinders.

5. The wellhead reset device as described in claim 1, characterized in that: It also includes a cooling system and a power source. The cooling system connects the various components through a pipeline system, and the power source connects the telescopic track drive system, the chain drive system, and the six-degree-of-freedom platform through a pipeline system.

6. The wellhead reset device as described in claim 1, characterized in that: The surface of the wellhead resetting device is coated with a heat-insulating coating and a protective armor.

7. A wellhead reset system, comprising the wellhead reset device according to any one of claims 1-6, characterized in that: It also includes an ignition tube and a blowout preventer, wherein the ignition tube is connected to the blowout preventer and the clamping device clamps the ignition tube.

8. The wellhead reset system as described in claim 7, characterized in that: The ignition tube includes a detachable upper section and a lower section. The upper section of the ignition tube is provided with a clamping surface that matches the clamping device, and a pressure plate is provided below the clamping surface.

9. The wellhead reset system as described in claim 7, characterized in that: The blowout preventer is connected to a positioning guide device below it, which includes a conical section and a straight section from bottom to top.

10. The wellhead reset system as described in claim 9, characterized in that: The positioning and guiding device is equipped with a coordinate sensor, and the telescopic track is equipped with a camera. The coordinate sensor and the camera are connected to the control system.

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