Annular blowout preventer piston assembling device

Abstract

The utility model provides an annular blowout preventer piston assembling device which comprises an annular blowout preventer, a double-acting hydraulic cylinder, a connecting disc, a synchronous hydraulic cylinder, a positioning pin air cylinder, a positioning pin air cylinder, a double-acting hydraulic cylinder control table and a synchronous hydraulic cylinder control table. The double-acting hydraulic cylinder is connected with the connecting disc through a fixing bolt, the annular blowout preventer is connected with the connecting disc through a connecting screw rod, the synchronous hydraulic cylinder is installed between the annular blowout preventer and the connecting disc, and the positioning pin air cylinder is installed at the bottom of the annular blowout preventer. The piston assembling device for the annular blowout preventer can be used for assembling and disassembling pistons of seven types of annular blowout preventers, the problem of universality is solved, the safety risk in operation is reduced, and the inspection and maintenance quality of the annular blowout preventer is improved.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas well engineering technology, and more specifically, to a ring blowout preventer piston assembly device. Background Technology

[0002] Annular blowout preventers, also known as universal blowout preventers or ball blowout preventers, are one of the main well control equipment used to handle overflows, kicks, and blowouts. Annular blowout preventers have advantages such as high pressure resistance, reliable sealing, convenient operation, and rapid opening and closing. They can seal tubing strings of various shapes and sizes, and can also completely seal the wellhead.

[0003] The piston is an important component of the annular blowout preventer. Its function is to pressurize the rubber core under the pressure of hydraulic oil in the cylinder, thereby forcing the rubber core to converge towards the center to achieve the purpose of shutting off the well.

[0004] After a period of use or if a leak occurs, the annular blowout preventer (BOP) requires disassembly of its components, replacement of seals, and reassembly to restore its original function. Currently, during maintenance, disassembly of the annular BOP piston typically takes only 20-30 minutes if all goes smoothly. However, if jamming occurs, disassembly becomes extremely difficult. The current method for removing a jammed piston involves first using a crane or similar lifting equipment to lift the piston, then having the operator tap the four opposite corners of the piston's edge with a copper rod. This repeated vibration, combined with the crane's lifting action, slowly detaches the piston from the housing. The same method is used to assemble the piston. This process results in uneven force on the piston, easily leading to jamming, slow disassembly speed, high labor intensity, low work efficiency, low assembly accuracy, and uncontrolled assembly quality.

[0005] Therefore, a device for disassembling and assembling pistons of seven types of annular blowout preventers used in the Tarim Oilfield was designed. The device uses a mechanical method to disassemble and assemble the annular blowout preventer piston assembly, which solves the difficulties in removal and assembly caused by piston tilting. At the same time, it also solves the problems of high labor intensity, low assembly accuracy, and low maintenance efficiency. Utility Model Content

[0006] The purpose of this utility model is to address at least one of the aforementioned deficiencies in the prior art. For example, one objective of this utility model is to provide a ring-shaped blowout preventer piston assembly device; another objective of this utility model is to provide a method for using the ring-shaped blowout preventer piston assembly device.

[0007] To achieve the above objectives, this utility model provides a ring blowout preventer piston assembly device, which includes: a ring blowout preventer, a double-acting hydraulic cylinder, a connecting plate, a synchronizing hydraulic cylinder, a positioning pin cylinder, a positioning pin cylinder, a double-acting hydraulic cylinder control console, and a synchronizing hydraulic cylinder control console.

[0008] The double-acting hydraulic cylinder is connected to the annular blowout preventer via a flange, the double-acting hydraulic cylinder is connected to the connecting plate via fixing bolts, the annular blowout preventer is connected to the connecting plate via a connecting screw, the synchronizing hydraulic cylinder is installed between the annular blowout preventer and the connecting plate, and the locating pin cylinder is installed at the bottom of the annular blowout preventer.

[0009] Alternatively, the annular blowout preventer includes a blowout preventer positioning and maintenance base, an annular housing, an annular piston, and a connecting screw; the blowout preventer positioning and maintenance base includes a chuck groove, a cylinder flange fixing groove, a double-acting cylinder fixing screw hole, a positioning pin hole, and a positioning pin.

[0010] Alternatively, the double-acting hydraulic cylinder includes a connecting flange, connecting bolts, a piston, a connecting piston flange, and a hydraulic cylinder oil passage lifting port.

[0011] Alternatively, the connecting plate may include reinforcing ribs, a large piston connecting through hole, a small piston connecting through hole, a double-acting connecting through hole, and a lifting hole.

[0012] Alternatively, the synchronous hydraulic cylinder includes a piston rod, a magnetic base, and a hydraulic cylinder oil passage lifting port.

[0013] This utility model provides a method for using an annular blowout preventer piston assembly device, wherein the device is the aforementioned annular blowout preventer piston assembly device.

[0014] The method of use includes:

[0015] Adjust the pressure of the blowout preventer maintenance control panel to 5MPa, and set the control panel button to the hydraulic cylinder oil passage lifting port position.

[0016] A double-acting hydraulic cylinder holds the connecting plate in place, and the connecting plate pulls the piston upwards using the connecting screw; a synchronous hydraulic cylinder simultaneously holds the connecting plate in place, causing the piston to be pushed out horizontally.

[0017] If the piston does not move, the pressure on the control panel gradually increases until the piston is pulled out.

[0018] After the annular piston is inspected and the packing is replaced, it is hoisted into the annular blowout preventer housing, and the connecting plate and piston are installed. The three-position four-way directional valve handle on the control console is switched to the cylinder retraction position, and the annular piston and connecting plate are pressed down by the connecting screw to achieve horizontal assembly of the piston.

[0019] Optionally, the operating table pressure can be adjusted up to the rated working pressure of the hydraulic cylinder of 20MPa, and the maximum upward thrust of the hydraulic cylinder is 600KN; the maximum downward pressure of the annular piston and connecting plate by the connecting screw is 300KN.

[0020] Compared with the prior art, the beneficial effects of this utility model include at least one of the following:

[0021] (1) The piston assembly device of the annular blowout preventer of this utility model can meet the needs of seven types of annular blowout preventers for disassembling and assembling pistons, solving the problem of universality, reducing the safety risks in operation, and improving the quality of annular blowout preventer inspection and maintenance.

[0022] (2) The ring blowout preventer piston assembly device of this utility model does not require the use of brute force to remove the ring piston by knocking or smashing, thus solving the problem of difficulty in removal and assembly caused by piston tilting. At the same time, it solves the problems of high labor intensity and long maintenance time, and realizes semi-automation of tools.

[0023] (3) The ring blowout preventer piston assembly device of this utility model is of great significance for improving production efficiency and protecting equipment and personnel safety. Attached Figure Description

[0024] The above and other objects and / or features of this utility model will become clearer from the following description taken in conjunction with the accompanying drawings, wherein:

[0025] Figure 1 A three-dimensional diagram of the overall structure of the device of this utility model is shown.

[0026] Figure 2 A three-dimensional view of the blowout preventer positioning and maintenance base of the present invention is shown.

[0027] Figure 3 A three-dimensional view of the double-acting hydraulic cylinder of the present invention is shown.

[0028] Figure 4 A three-dimensional view of the connecting plate of the present invention is shown.

[0029] Figure 5 A three-dimensional view of the synchronous liquid cylinder of the present invention is shown.

[0030] Explanation of key figure labels:

[0031] 1-Blowout preventer positioning and maintenance base; 2-Annular housing; 3-Annular piston; 4-Connecting screw; 5-Double-acting hydraulic cylinder; 6-Connecting plate; 7-Fixing bolt; 8-Synchronizing hydraulic cylinder; 9-Positioning pin cylinder; A-Positioning pin cylinder and double-acting hydraulic cylinder control console; B-Synchronizing hydraulic cylinder control console;

[0032] 101-Blowout preventer positioning and maintenance base body; 102-Chuck groove; 103-Cylinder flange fixing groove; 104-Double-acting cylinder fixing screw hole; 105-Positioning pin hole and positioning pin;

[0033] 501-Connecting flange; 502-Connecting bolt; 503-Hydraulic cylinder; 504-Piston; 505-Connecting piston flange; 506-M52*3 bolt; 507-Hydraulic cylinder oil passage (lowering); 508-Hydraulic cylinder oil passage (raising);

[0034] 601 - Integral cast connecting plate; 602 - Reinforcing tie; 603 - Large piston connection through hole; 604 - Small piston connection through hole; 605 - Double-acting hydraulic cylinder connection through hole; 606 - Lifting hole;

[0035] 801-Piston rod; 802-Hydraulic cylinder; 803-Magnetic base; 804-Hydraulic cylinder oil passage (lowering); 805-Hydraulic cylinder oil passage (raising). Detailed Implementation

[0036] In the following description, an annular blowout preventer piston assembly device of the present invention will be explained in detail with reference to exemplary embodiments.

[0037] Exemplary Example 1

[0038] This exemplary embodiment provides an annular blowout preventer piston assembly device, the device comprising: an annular blowout preventer, a double-acting hydraulic cylinder 5, a connecting plate 6, a synchronizing hydraulic cylinder 8, a locating pin cylinder 9, a locating pin cylinder and a double-acting hydraulic cylinder control console A, and a synchronizing hydraulic cylinder control console B;

[0039] The double-acting hydraulic cylinder 5 is connected to the annular blowout preventer via a flange. The double-acting hydraulic cylinder 5 is connected to the connecting plate 6 via fixing bolts 7. The annular blowout preventer is connected to the connecting plate 6 via connecting screws 4. The synchronizing hydraulic cylinder 8 is installed between the annular blowout preventer and the connecting plate 6. The locating pin cylinder 9 is installed at the bottom of the annular blowout preventer.

[0040] In this embodiment, the annular blowout preventer includes a blowout preventer positioning and maintenance base 1, an annular housing 2, an annular piston 3, and a connecting screw 4; the blowout preventer positioning and maintenance base includes a blowout preventer positioning and maintenance base body 101, a chuck groove 102, a hydraulic cylinder flange fixing groove 103, a double-acting hydraulic cylinder fixing screw hole 104, and a positioning pin hole and a positioning pin 105.

[0041] In this embodiment, the double-acting hydraulic cylinder 5 includes a connecting flange 501, a connecting bolt 502, a hydraulic cylinder 503, a piston 504, a connecting piston flange 505, an M52*3 bolt 506, a hydraulic cylinder oil passage (lowering) 507, and a hydraulic cylinder oil passage (raising) 508.

[0042] In this embodiment, the connecting plate 6 includes an integrally cast connecting plate 601, a reinforcing rib 602, a large piston connecting through hole 603, a small piston connecting through hole 604, a double-acting connecting through hole 605, and a lifting hole 606.

[0043] In this embodiment, the synchronous hydraulic cylinder 8 includes a piston rod 801, a hydraulic cylinder 802, a magnetic base 803, a hydraulic cylinder oil passage (lowering) 804, and a hydraulic cylinder oil passage (raising) 805.

[0044] Exemplary Example 2

[0045] This exemplary embodiment provides a method of using an annular blowout preventer piston assembly device, wherein the annular blowout preventer piston assembly device is the device described in Exemplary Embodiment 1.

[0046] In this embodiment, the method of use includes:

[0047] Adjust the pressure of the blowout preventer maintenance control panel to 5MPa, and set the control panel button to the hydraulic cylinder oil passage lifting port position.

[0048] The double-acting hydraulic cylinder 5 presses against the connecting plate 6, and the connecting plate pulls the annular piston 3 upward by the connecting screw 4; the synchronous hydraulic cylinder 8 simultaneously presses against the connecting plate 6 to push the piston out horizontally.

[0049] If the piston does not move, the pressure on the control panel gradually increases until the piston is pulled out.

[0050] After the annular piston is inspected and the packing is replaced, it is hoisted into the annular blowout preventer housing, and the connecting plate and piston are installed. The three-position four-way directional valve handle on the control console is switched to the hydraulic cylinder retraction position, and the annular piston 3 and the connecting plate 6 are pressed down by the connecting screw 4 to achieve horizontal assembly of the piston.

[0051] In this embodiment, the operating table pressure is adjusted to a maximum of 20MPa, the rated working pressure of the hydraulic cylinder, and the maximum upward thrust of the hydraulic cylinder is 600KN; the maximum downward pressure exerted by the annular piston 3 and the connecting plate 6 by the connecting screw 4 is 300KN.

[0052] Although the present invention has been described above in conjunction with exemplary embodiments and accompanying drawings, those skilled in the art should understand that various modifications can be made to the above embodiments without departing from the spirit and scope of the claims.

Claims

1. An annular preventer piston assembly apparatus, comprising: The device comprises a ring-shaped blowout preventer, a double-acting hydraulic cylinder, a connecting disc, a synchronous hydraulic cylinder, a positioning pin cylinder, a positioning pin cylinder and double-acting hydraulic cylinder control console and a synchronous hydraulic cylinder control console, wherein, The double-acting hydraulic cylinder is connected with the ring-shaped blowout preventer through a flange, the double-acting hydraulic cylinder is connected with the connecting disc through a fixing bolt, the ring-shaped blowout preventer is connected with the connecting disc through a connecting screw rod, the synchronous hydraulic cylinder is installed between the ring-shaped blowout preventer and the connecting disc, and the positioning pin cylinder is installed at the bottom of the ring-shaped blowout preventer.

2. The ring preventer piston assembly of claim 1, wherein, The ring-shaped blowout preventer comprises a blowout preventer positioning and maintenance base, a ring-shaped housing, a ring-shaped piston and a connecting screw rod; the blowout preventer positioning and maintenance base comprises a chuck groove, a hydraulic cylinder flange fixing groove, a double-acting hydraulic cylinder fixing screw hole and a positioning pin hole and a positioning pin.

3. The ring preventer piston assembly of claim 1, wherein, The double-acting hydraulic cylinder comprises a connecting flange, a connecting bolt, a piston, a connecting piston flange and a hydraulic cylinder oil channel lifting opening.

4. The ring preventer piston assembly of claim 1, wherein, The connecting disc comprises a reinforcing rib, a large piston connecting through hole, a small piston connecting through hole, a double-acting connecting through hole and a lifting hole.

5. The ring preventer piston assembly of claim 1, wherein, The synchronous hydraulic cylinder comprises a piston rod, a magnetic attraction base and a hydraulic cylinder oil channel lifting opening.

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