Universal blowout preventer hoisting operation wellhead support

Abstract

The utility model relates to a blowout preventer hoisting technical field especially relates to a general type blowout preventer hoisting operation well mouth support, the general type blowout preventer hoisting operation well mouth support includes main support, both sides of main support all are equipped with the side frame of supporting it, the lower symmetry of main support inside installs the fender bar of supporting blowout preventer. The utility model provides general type blowout preventer hoisting operation well mouth support, in the hoisting process of blowout preventer, through the butt joint of the auxiliary of support, can make the whole formation closed frame limiting structure outside blowout preventer, in the process of hoisting and putting down, through the auxiliary support of moving down and unfolding the pad, can carry out the preliminary support of blowout preventer butt joint part in well mouth butt joint part, and further can reduce the probability of knock between component and well mouth, can protect the flange sealing surface and ensure the reliability of well mouth sealing.

Description

Technical Field

[0001] This utility model relates to the field of blowout preventer (BOP) hoisting technology, and in particular to a universal wellhead support for BOP hoisting operations. Background Technology

[0002] In onshore drilling and oil and gas well workover systems, blowout preventers (BOPs) are the core barrier for well control safety. They are directly mounted on the upper end of the wellhead cross passage and are used to quickly seal the wellbore when abnormal conditions such as well kick or blowout occur downhole, blocking the passage for high-pressure formation fluids to gush out and avoiding major safety accidents such as equipment damage, personnel casualties, and environmental pollution.

[0003] When installing blowout preventers (BOPs), the common method is to lift and install them by wrapping the BOP valve body with a wire rope. In this method, the BOP is prone to twisting and swaying during the lifting and lowering process. When lowering and aligning it, it is very easy to bump into components such as the wellhead four-way sealing flange, which can easily cause scratches on the sealing surface and damage to the threads, thus affecting the reliability of the wellhead seal.

[0004] Therefore, it is necessary to provide a new universal wellhead support for lifting and operating blowout preventers to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a universal wellhead support for lifting and operating blowout preventers.

[0006] The universal blowout preventer hoisting and operation wellhead support provided by this utility model includes a main support, and side frames supporting it are provided on both sides of the main support. Symmetrically installed at the lower part of the main support are baffles that support the blowout preventer, and symmetrically installed at the upper part of the main support are pressure bars that vertically limit the blowout preventer. A compression plate that abuts against the outer wall of the blowout preventer is symmetrically installed at the center of the main support. Symmetrically distributed guide rods are fixedly installed on both sides of the outer wall of the extrusion plate. The two guide rods are fitted with the same slidingly connected support frame. The support frame is fixedly connected to the main support. A threaded drive rod is inserted inside the support frame. One end of the drive rod passes through the support frame and is rotatably connected to the extrusion plate. A turntable is fixedly installed at the end of the drive rod away from the extrusion plate.

[0007] Preferably, the main support has docking grooves on both sides of the top, and docking rods are inserted into the docking grooves. The top of the docking rods is fixedly connected to the bottom of the pressure rods.

[0008] Preferably, the bottom end of the docking rod passes through the docking groove and is fitted with a threaded limiting cap, and the top end of the limiting cap abuts against the top of the main bracket.

[0009] Preferably, the side frame has a slot inside, and a slidingly connected support column is inserted into the slot. The top of the support column on the same side is fixedly installed with the same pad.

[0010] Preferably, a rotatably connected threaded cylinder is installed inside the side frame, and a motor for controlling the rotation of the threaded cylinder is fixedly installed on the side frame.

[0011] Preferably, a threaded rod with a threaded connection is inserted inside the threaded cylinder, the bottom end of the threaded rod is rotatably connected to the top of the pad, and a protective cover is sleeved between the pad and the threaded cylinder to cover the external thread structure of the threaded rod.

[0012] Preferably, both the side frame and the main support are equipped with fixedly connected foot pedals on their outer walls.

[0013] Compared with related technologies, the universal blowout preventer hoisting and operation wellhead support provided by this utility model has the following advantages: 1. During the hoisting of the blowout preventer, the auxiliary docking of the bracket can form a closed frame limiting structure on the outside of the blowout preventer. During the hoisting and lowering process, the auxiliary support of the pad is moved downward to provide initial support for the docking part of the blowout preventer at the wellhead docking part, thereby reducing the probability of collision between the component and the wellhead, protecting the flange sealing surface and ensuring the reliability of the wellhead seal. 2. This utility model uses multiple sets of adjustable extrusion plates to simultaneously clamp the outer wall of the blowout preventer, and with the liftable pressure rod, it can adapt to blowout preventers of different heights and outer diameters, effectively improving the applicability of the support. There is no need to customize multiple toolings separately, thus reducing the equipment storage cost at the well site. 3. This utility model integrates multiple sets of foot pedals on the outer wall of the main support and side frame. After the blowout preventer is hoisted into place, it can directly form an integrated high-altitude operation platform without the need for on-site scaffolding. This makes it convenient for operators to complete high-altitude operations such as flange tightening and hydraulic pipeline connection, thereby improving the safety and efficiency of well control operations. Attached Figure Description

[0014] Figure 1 A schematic diagram of a preferred embodiment of the universal blowout preventer hoisting and operating wellhead support provided by this utility model; Figure 2 for Figure 1 A schematic diagram of the main support frame and its components is shown. Figure 3 for Figure 1 A partial cross-sectional structural diagram of the side frame and its components is shown. Figure 4 for Figure 1 A schematic diagram of the support frame and its components shown; Figure 5This is a schematic diagram of the structure of this utility model after it is connected with the blowout preventer.

[0015] The following are the labels in the diagram: 1. Main support; 11. Connecting groove; 12. Pressure rod; 121. Connecting rod; 122. Limit cap; 13. Stop bar; 2. Side frame; 21. Slot; 3. Pad; 31. Support column; 4. Foot pedal; 5. Support frame; 51. Extrusion plate; 511. Guide rod; 52. Drive rod; 6. Threaded cylinder; 61. Threaded rod. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0018] Please see Figures 1 to 5 This utility model provides a universal blowout preventer hoisting and operation wellhead support, which includes a main support 1 and side supports 2 on both sides of the main support 1 for supporting it.

[0019] In the embodiments of this utility model, please refer to Figures 1 to 5 A baffle 13 supporting the blowout preventer is symmetrically installed at the lower part of the main support 1. A pressure bar 12 vertically limiting the blowout preventer is symmetrically installed at the upper part of the main support 1. An extrusion plate 51 abutting against the outer wall of the blowout preventer is symmetrically installed at the center of the main support 1. Guide rods 511 are symmetrically distributed on both sides of the outer wall of the extrusion plate 51. The two guide rods 511 are fitted with the same slidingly connected support frame 5. The support frame 5 is fixedly connected to the main support 1. A threaded drive rod 52 is inserted into the support frame 5. One end of the drive rod 52 passes through the support frame 5 and is rotatably connected to the extrusion plate 51. A turntable is fixedly installed at the end of the drive rod 52 away from the extrusion plate 51.

[0020] It should be noted that when connecting the blowout preventer to the main support 1, the lower baffle 13 is used to support the blowout preventer valve body from the bottom and bear the vertical load of the blowout preventer. Then, the upper pressure bar 12 is vertically limited from above the valve body. During installation, the upper pressure bar 12 can also slide horizontally along the mating groove 11 as needed, so that the side wall of the upper pressure bar 12 abuts against the side wall of the blowout preventer. Then, the operator can rotate the outer turntable, which drives the drive rod 52 to rotate. The drive rod 52 feeds in the support frame 5 by means of the threaded pair, pushing the extrusion plate 51 closer to the blowout preventer. The guide rods 511 on both sides restrict the deflection of the extrusion plate 51 and ensure that the extrusion plate 51 moves horizontally. Therefore, it can clamp and fix blowout preventers with different outer diameters. By extruding the side wall of the blowout preventer valve body by the extrusion plate 51, radial extrusion positioning can be achieved, thereby avoiding the phenomenon of valve body torsion and displacement during hoisting. A rubber buffer pad can be added to the side of the extrusion plate 51 that contacts the blowout preventer to avoid scratching the anti-corrosion coating of the blowout preventer during clamping, while increasing the clamping friction and improving the fixing stability. After the blowout preventer is fixed to the main support 1, the lifting equipment can be connected to the main support 1 during hoisting to complete the hoisting of the blowout preventer. During the subsequent hoisting and lowering process, the auxiliary support of the pad plate 3 can be moved downward to provide initial support for the docking part of the blowout preventer at the wellhead docking part, thereby reducing the probability of collision between the component and the wellhead, protecting the flange sealing surface and ensuring the reliability of the wellhead seal. The drive rod 52 is also covered with a protective sleeve to cover its external thread structure, which can prevent impurities such as mud and oil from the well site from falling on the thread structure and causing the drive rod 52 to get stuck.

[0021] In the embodiments of this utility model, please refer to Figures 1 to 5 Both sides of the top of the main support 1 are provided with docking grooves 11. A docking rod 121 is inserted into the docking groove 11. The top end of the docking rod 121 is fixedly connected to the bottom of the pressure rod 12. The bottom end of the docking rod 121 passes through the docking groove 11 and is fitted with a threaded limit cap 122. The top end of the limit cap 122 abuts against the top of the main support 1.

[0022] It should be noted that the docking rod 121 can slide up and down along the docking groove 11 to adjust the vertical height of the pressure rod 12, adapting to blowout preventers of different heights and sizes. After adjusting to the appropriate height, tighten the bottom limit cap 122. The limit cap 122 presses against the inner wall of the main bracket 1, locking the position of the docking rod 121 and completing the height fixation of the pressure rod 12.

[0023] In the embodiments of this utility model, please refer to Figures 1 to 5The side frame 2 has a slot 21 inside, and a sliding support column 31 is inserted into the slot 21. The top of the support column 31 on the same side is fixedly installed with the same pad 3. The side frame 2 has a rotatably connected threaded cylinder 6 inside, and a motor that controls the rotation of the threaded cylinder 6 is fixedly installed on the side frame 2. The threaded cylinder 6 has a threaded rod 61 inserted inside, and the bottom end of the threaded rod 61 is rotatably connected to the top of the pad 3. A protective cover is fitted between the pad 3 and the threaded cylinder 6 to cover the external thread structure of the threaded rod 61.

[0024] It should be noted that: after the external lifting equipment suspends the blowout preventer above the wellhead, the motors on both sides can be started to drive the corresponding threaded cylinders 6 to rotate synchronously. The rotating threaded cylinders 6 will drive the internal threaded rods 61, causing the bottom pad 3 to move downward. When the pad 3 descends and supports the wellhead base, the initial positioning of the blowout preventer can be achieved. Subsequently, when aligning the blowout preventer with the wellhead flange, the blowout preventer will wobble, which makes it easier to manually correct the coaxiality of the blowout preventer flange. In this embodiment, a protective cover is fitted on the outside of the threaded rod 61. The protective cover completely encloses the threaded transmission structure, isolating the well site from mud, sand, and oil, preventing thread corrosion and jamming, and ensuring the long-term stable operation of the lifting mechanism.

[0025] In the embodiments of this utility model, please refer to Figures 1 to 5 Both the side frame 2 and the main support 1 are equipped with fixedly connected foot pedals 4.

[0026] It should be noted that multiple sets of step pedals are arranged in layers to form a continuous climbing channel. Operators can climb along step pedals to the corresponding heights of the blowout preventer flange and hydraulic joints to complete bolt tightening and pipeline connection operations at close range.

[0027] The working principle of the universal blowout preventer hoisting and operation wellhead support provided by this utility model is as follows: To achieve this, the main support 1 can be placed on a flat surface so that the blowout preventer can be vertically lifted into the inner cavity of the main support 1 using a crane. After the bottom of the blowout preventer is above the stop bar 13, the turntable can be rotated to push the extrusion plate 51 to clamp the valve body. Then, the connecting rod 121 at the bottom of the pressure rod 12 can be inserted into the connecting groove 11. After the outer wall of the pressure rod 12 abuts against the outer wall of the blowout preventer, the limit cap 122 can be turned to lock it, thereby completing the fixation of the blowout preventer and the main support 1. During hoisting operations, the crane hook can be connected to the main support 1 to lift the entire device. After the blowout preventer is hoisted above the wellhead cross passage, the motors on both sides can be started to drive the threaded cylinder 6 to rotate. The threaded rod 61 drives the pad 3 to descend and support it on the wellhead base, thereby achieving the initial positioning of the device. During this process, the bottom of the blowout preventer does not contact the flange at the top of the wellhead. Therefore, when the staff adjusts the coaxiality of the blowout preventer and the wellhead, it can avoid the blowout preventer from hitting the wellhead and causing damage to the connection part. After the coaxiality adjustment is completed, the crane wire rope can be unloaded, and then the motors on both sides can be controlled to rotate synchronously in opposite directions to lower the blowout preventer until the bottom flange of the blowout preventer abuts against the top flange of the wellhead, thus completing the docking.

[0028] In this invention, the start / stop and forward / reverse control of the motors are uniformly controlled by a PLC controller. The controller outputs signals to synchronously drive the motors on both sides, ensuring that the lifting stroke of the pads 3 on both sides is synchronized. The encoder feedback lines of the two motors are respectively connected to the signal acquisition terminal of the main controller to form a closed-loop speed feedback. The start / stop control terminals of the two drivers are connected in parallel and uniformly connected to the main controller output terminal to achieve synchronous start / stop. The drive signals are uniformly distributed through the circuit, and the feedback signals are used to correct the deviation in real time, ensuring that the speed and rotation angle of the two motors are consistent, ensuring that the lifting height of the pads 3 on both sides is uniform, and avoiding the main support 1 from tilting due to force on one side. The circuits and controls involved are all existing technologies and will not be described in detail here.

[0029] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A general-purpose blowout preventer hoisting operation wellhead support, comprising a main support (1), wherein both sides of the main support (1) are provided with side frames (2) for supporting it. Its features are: The main support (1) is symmetrically equipped with a baffle (13) for supporting the blowout preventer at the lower part of the interior, and a pressure bar (12) for vertically limiting the blowout preventer is symmetrically equipped at the upper part of the interior, and a compression plate (51) that abuts against the outer wall of the blowout preventer is symmetrically installed at the center of the interior of the main support (1). Symmetrically distributed guide rods (511) are fixedly installed on both sides of the outer wall of the extrusion plate (51). The two guide rods (511) are fitted with the same sliding support frame (5). The support frame (5) is fixedly connected to the main support (1). A threaded drive rod (52) is inserted inside the support frame (5). One end of the drive rod (52) passes through the support frame (5) and is rotatably connected to the extrusion plate (51). A turntable is fixedly installed at the end of the drive rod (52) away from the extrusion plate (51).

2. The generic type of the wellhead hoisting operation stand-off support of the blowout preventer as claimed in claim 1, wherein, The main support (1) has docking grooves (11) on both sides of the top. A docking rod (121) is inserted into the docking groove (11). The top of the docking rod (121) is fixedly connected to the bottom of the pressure rod (12).

3. The generic type of the wellhead hoisting operation stand-off of the blowout preventer as claimed in claim 2, wherein, The bottom end of the docking rod (121) passes through the docking groove (11) and is fitted with a threaded limit cap (122), and the top end of the limit cap (122) abuts against the top of the main bracket (1).

4. The generic type of hang-off rig stock for blowout preventer according to claim 1, wherein, The side frame (2) has a slot (21) inside, and a sliding support column (31) is inserted into the slot (21). The top of the support column (31) on the same side is fixedly installed with the same pad (3).

5. The generic type of the wellhead hoisting operation stand-off of the blowout preventer as claimed in claim 4, wherein, The side frame (2) is equipped with a rotatably connected threaded cylinder (6), and a motor for controlling the rotation of the threaded cylinder (6) is fixedly installed on the side frame (2).

6. The generic type of the wellhead hoisting operation stand-off support of the blowout preventer as claimed in claim 5, wherein, The threaded cylinder (6) is fitted with a threaded rod (61) with a threaded connection inside. The bottom end of the threaded rod (61) is rotatably connected to the top of the pad (3). A protective cover is fitted between the pad (3) and the threaded cylinder (6) to cover the external thread structure of the threaded rod (61).

7. The generic type of hang-off rig stock for blowout preventer according to claim 1, wherein, Both the side frame (2) and the main support (1) are equipped with fixedly connected foot pedals (4).

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