CN201778740U

CN201778740U - Marine underwater parallel double-hydraulic-cylinder gate plate blowout preventer

Info

Publication number: CN201778740U
Application number: CN201020302218XU
Authority: CN
Inventors: 卢韵皎; 王定亚; 邓平; 任钢峰
Original assignee: Baoji Oilfield Machinery Co Ltd
Current assignee: Baoji Oilfield Machinery Co Ltd
Priority date: 2010-02-03
Filing date: 2010-02-03
Publication date: 2011-03-30
Anticipated expiration: 2020-02-03

Abstract

The utility model discloses a marine underwater parallel double-hydraulic-cylinder gate plate blowout preventer, which comprises a plurality of sets of symmetric lateral doors arranged on a casing. The lateral doors are fixed to the casing, a double-hydraulic-cylinder assembly mounted on each lateral door structurally comprises two parallel single hydraulic cylinders, one end of a cylinder sleeve of each single hydraulic cylinder is fixedly connected with the corresponding lateral door, hydraulic cylinder end covers are mounted at the other ends of the cylinder sleeves, a piston and a gate plate shaft integrally connected with each other are arranged in a stepped inner cavity of each cylinder sleeve, locking rods are sleeved on shaft cores of the pistons by the aid of sliding sleeves sleeved with the locking rods in a threaded manner, the locking rods penetrating out of the hydraulic cylinder end covers are connected with driving devices, and the gate plate shafts of the two single hydraulic cylinders are connected with a gate plate assembly after penetrating through the corresponding lateral door. The marine underwater parallel double-hydraulic-cylinder gate plate blowout preventer adopts two small-diameter pistons to replace a large-diameter piston, reduces the weight of the gate plate blowout preventer, the total height and complicacy of the gate plate blowout preventer, and reduces requirements on a control system and liquid storage of the blowout preventer.

Description

Parallel double fluid cylinder ram preventer under the ocean water

Technical field

The utility model belongs to petroleum drilling and mining equipment technology field, relates to parallel double fluid cylinder ram preventer under a kind of ocean water,

Background technology

The fluid cylinder of present ram preventer, all be fluid cylinder to be divided into two chambeies of opening and closing by a piston, flashboard is to enter fluid cylinder driven plunger formation thrust by the hydraulic fluid that hydraulic control system provides to cut out and open, when being designed for the ram preventer of sealed high pressure well, for increasing piston thrust, can only oversize piston size and corresponding fluid cylinder size, the result who does like this is whole height and the weight that has increased ram preventer.

Preventer in use under water, generally all be that several preventers are used in combination, claim blowout preventer set under water, the design specifications requirement of blowout preventer set under water, must there be the enough hydraulic pressure that has certain pressure on the blowout preventer set and can (in the accumulator steel cylinder, has the liquid of band pressure), be enough to blowout preventer set is carried out several cycles operation, because piston size is big, it is very big to close and open the required amount of hydraulic fluid in chamber.If the blowout preventer set of high pressure, big latus rectum, even the hydraulic oil of the liter more than 1,000 that need prestore, increased the size and the weight of blowout preventer set.

Constantly perfect along with preventer, the mechanical locking system of its flashboard also becomes increasingly complex.Present ram preventer under water mostly is to adopt hydraulic locking, because design is complicated and part is more, the complexity of system has reduced reliability, often occurring after the flashboard locking can't release or the phenomenon that can't lock, considerable preventer fault is under water stopped work owing to can't release cause after the preventer locking, preventer need be unloaded to ground maintenance, locking was lost efficacy even can be caused catastrophic consequence.

Summary of the invention

The purpose of this utility model provides parallel double fluid cylinder ram preventer under a kind of ocean water, solved exist in the prior art because complex structure, bulky, causing often occurring after the flashboard locking can't release or the problem that can't lock.

The technical solution adopted in the utility model is, parallel double fluid cylinder ram preventer under a kind of ocean water, be included in housing and be provided with the symmetrical side door of many groups, side door and housing are fixed together, one cover biliquid cylinder assembly is installed on each side door, each total Chengdu of biliquid cylinder is made up of single fluid cylinder of two parallel minor diameters, and each single fluid cylinder is connected with drive unit by transmission device.

Biliquid cylinder ram preventer of the present utility model, its feature also is:

The structure of described biliquid cylinder assembly is, comprise two single fluid cylinders, cylinder sleeve one end of each single fluid cylinder is fixedlyed connected with side door, the other end of cylinder sleeve is equipped with the fluid cylinder end cap, and the inner chamber of each cylinder sleeve is a step, is provided with the piston and the flashboard axis that connect as one, the axle core of piston is set with securing rod by sliding sleeve, securing rod passes outside the fluid cylinder end cap, and the flashboard axis of two single fluid cylinders all links to each other with intermediate bar after passing side door, and intermediate bar links to each other with the flashboard assembly; Securing rod is connected with drive unit by transmission device,

Each piston is made up of piston head and piston body, and piston head is corresponding with the cylinder sleeve inner stepped with piston body, and piston is divided into cylinder sleeve inside closes chamber, intermediate cavity, unlatching chamber, opens the chamber external diameter less than closing the chamber; Have the hydraulic oil port A that closes the chamber at the fluid cylinder end cap, on the cylinder sleeve big circumference, have the hydraulic oil port B of intermediate cavity, have the hydraulic oil port C that opens the chamber at side door.

Described piston be single diameter the axle or with a plurality of steps the axle.

Be provided with sealing ring on described piston head and the piston body separately.

Parallel double fluid cylinder structure of the present utility model is to replace an enlarged bore piston with two small bore pistons in same axial plane position, has reduced weight, overall height and the complexity of ram preventer; Because fluid cylinder and piston have adopted step, have increased intermediate cavity, also just reduced the hydraulic pressure oil mass of using when flashboard is opened, reduce demand to the capacity of control system of preventer and deposit liquid; Independently drive unit has been adopted in the locking of flashboard simultaneously, has improved system reliability.

Description of drawings

Fig. 1 is the perspective view of the utility model device;

Fig. 2 is that the parallel double fluid cylinder in the utility model device drives schematic diagram (flashboard is in open position);

Fig. 3 is that the parallel double fluid cylinder in the utility model device drives schematic diagram (flashboard is in close stance);

Fig. 4 is parallel double fluid cylinder and the single fluid cylinder sectional dimension contrast schematic diagram in the utility model device;

Fig. 5 is drive unit and the transmission device embodiment schematic diagram in the utility model device;

Fig. 6 is the diagrammatic side views of Fig. 5 embodiment;

Fig. 7 is the schematic diagram of blowout preventer set under water of band accumulator steel cylinder.

Among the figure, 1. housing, 2. side door, 3. bolt, 4. single fluid cylinder, 5. biliquid cylinder assembly, 6. plunger shaft, 7. flashboard axis, 8. piston, 9. cylinder sleeve, 10. sliding sleeve, 11. securing rod, 12. intermediate bars, 13. fluid cylinder end caps, 14. sealing ring, 15. piston heads, 16. piston bodies, 18. close the chamber, 19. intermediate cavity, 20. open the chamber, 21. hydraulic oil port A, 22. hydraulic oil port B, 23. hydraulic oil port C, 24. drive unit, 25. motors, 26. transmission devices, 27. operating means, 28. annular preventers, 29. electronic ram preventers, 30. the hydraulic pressure gate preventer, 32. accumulators, 33. flashboard assemblies.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is elaborated.

Because in the flashboard unlatching, when closing, the move distance of piston equates, only opening the piston of chamber employing than minor diameter, could realize opening required hydraulic fluid less than closing required hydraulic fluid, so just can reduce that flashboard cuts out, required hydraulic fluid during the ON cycle operation, can reduce the hydraulic fluid that is stored in blowout preventer set, this has Special Significance to blowout preventer set under water.Piston diameter is little, and then the size of fluid cylinder is also just little.Another benefit that reduces the fluid cylinder size is the power that is produced when reducing to open flashboard; but in some cases; the power that forms when opening flashboard is not enough to promote flashboard; but surpassed the design load of some part in the drive unit; can cause the inefficacy of system like this; so the power when reducing to open shields to drive unit, effective application life of extension fixture.

As Fig. 1, it is the perspective view of the utility model device embodiment, parallel double fluid cylinder ram preventer group under the ocean water, be included in housing 1 and be provided with the symmetrical side door 2 of many groups, side door 2 is fixed together by bolt assembly 3 with housing 1, but can unload so that carry out the maintain and replace of flashboard, one cover biliquid cylinder assembly 5 is installed on each side door 2, each flashboard in the housing 1 all is to be driven by a parallel double fluid cylinder 5, each parallel double fluid cylinder 5 all is made up of single fluid cylinder 4 of two minor diameters that are parallel to each other, and each single fluid cylinder 4 is connected with drive unit 24 by transmission device 26.

As Fig. 2, Fig. 3, the internal construction of the biliquid cylinder assembly 5 in the utility model device is, each side door 2 is provided with two single fluid cylinders 4, cylinder sleeve 9 one ends of each single fluid cylinder 4 are fixedlyed connected with side door 2, the other end of cylinder sleeve 9 is equipped with fluid cylinder end cap 13, two cylinder sleeves 9 of 13 shutoff simultaneously of side door 2 and fluid cylinder end cap, the inner chamber of each cylinder sleeve 9 is the two-stage step, be provided with the piston 8 and the flashboard axis 7 that connect as one, the axle core of piston 8 is set with securing rod 11 by sliding sleeve 10, sliding sleeve 10 passes through the screw thread socket with securing rod 11, and securing rod 11 passes outside the fluid cylinder end cap 13, and securing rod 11 is connected with drive unit 24 by transmission device 26; The flashboard axis 7 of two single fluid cylinders 4 all links to each other with intermediate bar 12 after passing side door 2, can be synchronized with the movement to guarantee two pistons 8, and intermediate bar 12 links to each other with flashboard assembly 33.

Each piston 8 is made up of piston head 15 and piston body 16, piston head 15 is different owing to external diameter with piston body 16, constitute corresponding with cylinder sleeve 9 inner stepped, be provided with sealing ring 14 separately on piston head 15 and the piston body 16, piston 8 is divided into cylinder sleeve 9 inside closes chamber 18, intermediate cavity 19, unlatching 20 3 chambeies, chamber, open chamber 20 external diameters less than closing chamber 18, unlatching chamber 20 required hydraulic fluids are less than closes chamber 18.Have the hydraulic oil port A21 that closes chamber 18 at fluid cylinder end cap 13, on cylinder sleeve 9 big circumferences, have the hydraulic oil port B22 of intermediate cavity 19, have the hydraulic oil port C23 that opens chamber 20 at side door 2.

Because piston 8 and cylinder sleeve 9 are step, can form two or more cavitys as required; Piston body 16 can also be that the axle of single diameter also can be the axle with a plurality of steps.

Close chamber 18, open chamber 20 and all link to each other with a hydraulic power source.For preventer under water, the fluid of close chamber 18, opening in the chamber 20 can reuse, and also can discharge the seabed; The fluid of intermediate cavity 19 will with the environments such as subsea balance that keep-ups pressure, guarantee not influence the motion of piston 8, intermediate cavity 19 can communicate with the sea or link to each other with pressure compensating system.

The operating principle of parallel double fluid cylinder of the present utility model is:

1) in Fig. 3, flashboard axis 7 stretches in the housing 1 on earth, flashboard assembly 33 and parallel double fluid cylinder 5 are in closes and locked position, when need are got back to open position, give from hydraulic oil port A21 earlier and close chamber 18 pressurizations, lay down the axial load on sliding sleeve 10 and the securing rod 11, spin locking bar 11 makes sliding sleeve 10 contact until both to the motion of fluid cylinder end cap 13 directions again, given by hydraulic oil port C23 and open chamber 20 pressurizations this moment, promoting piston 8 moves to fluid cylinder end cap 13 directions, drive intermediate bar 12 and flashboard assembly 33 simultaneously and get back to open position realization release, see Fig. 2; When 5 work of parallel double fluid cylinder, intermediate bar 12 guarantees that two-piston is synchronous, and hydraulic system also should be synchronous to the fuel feeding of two single fluid cylinders 4.

2) see Fig. 3, after parallel double fluid cylinder 5 is got back to open position, at this moment, pressurize to closing chamber 18 from hydraulic oil port A21, promote piston 8 to the motion of side door 2 directions, simultaneously, the fluid that intermediate cavity 19 and unlatching chamber are 20 li is discharged from hydraulic oil port B22 and hydraulic oil port C23, after piston 8 moved to close stance, spin locking bar 11 promoted sliding sleeve 10 with piston 8 lockings again.

Fig. 4 is the contrast schematic diagram of single fluid cylinder and parallel biliquid cylinder, the hydraulic pressure area of piston when wherein on behalf of single fluid cylinder major diameter D, A drive; B is the piston area of the parallel double fluid cylinder of corresponding diameter d then, when area A=area B * 2, and diameter d=0.71 * diameter D.For example: available diameter is that 12 cun parallel double fluid cylinder replacement diameter is single fluid cylinder of 17 cun, and like this, the minimum spacing in flashboard chamber can be reduced into 12 cun, the remarkable demand that reduces hydraulic fluid by 17 cun.Simultaneously, parallel double fluid cylinder 5 is compared with producing the single major diameter driving fluid cylinder that equates motive force, and the former height is little, thereby reduces the height of preventer.

Fig. 5, Fig. 6 are drive unit and the transmission device embodiment schematic diagrames in the utility model device, two securing rods 11 of parallel double fluid cylinder 5 are connected with transmission device 26, transmission device 26 is connected with drive unit 24, drive unit 24 is used for lock lever 11 latching rams 8, drive unit 24 is made up of motor 25 and ROV operating means 27, when motor or power break down, can utilize ROV mode direct control operating means 27 wherein, utilize directly drive transmission 26 of the hydraulic pressure that stores.

Fig. 7 is a blowout preventer set example structure schematic diagram under water, comprises the electronic ram preventer of two groups of annular preventers 28, two groups 29, four groups of hydraulic pressure gate preventers 30 and organizes accumulator 32 more and form.Accumulator 32 is arranged on the blowout preventer set framework on every side.As seen from Figure 7, blowout preventer set is a very complex apparatus under water, is made up of many annulars and ram preventer, and separate unit ram preventer height is low more, and then overall height is also low more; Because can be placed in accumulator cylinder bottle on the blowout preventer set under water to the hydraulic pressure that has on the blowout preventer set, the Fluid Volume demand that has the liquid that has pressure in the cylinder bottle reduces, and can reduce the long-pending and quantity of accumulator bottle, has reduced the weight of whole blowout preventer set.

The parallel double fluid cylinder can be used in combination with above-mentioned locking device and securing rod and sliding sleeve, also can be used in combination with other various locking mechanisms.

Parallel double fluid cylinder structure of the present utility model is to replace an enlarged bore piston with two small bore pistons in same axial plane position, has reduced weight, overall height and the complexity of ram preventer; Because fluid cylinder and piston have adopted step, have increased intermediate cavity, also just reduced the hydraulic pressure oil mass of using when flashboard is opened, reduce demand to the capacity of control system of preventer and deposit liquid; Independently drive unit has been adopted in the locking of flashboard simultaneously, has improved system reliability.The utility model both can be applied under water, also can be applied to other occasions such as land, offshore platform.

Claims

1. parallel double fluid cylinder ram preventer under the ocean water, it is characterized in that: be included in the side door (2) that housing (1) is provided with many group symmetries, side door (2) is fixed together with housing (1), one cover biliquid cylinder assembly (5) is installed on each side door (2), each biliquid cylinder assembly (5) all is made up of single fluid cylinder (4) of two parallel minor diameters, and each single fluid cylinder (4) is connected with drive unit (24) by transmission device (26).

2. biliquid cylinder ram preventer according to claim 1, it is characterized in that: the structure of described biliquid cylinder assembly (5) is, comprise two single fluid cylinders (4), cylinder sleeve (9) one ends of each single fluid cylinder (4) are fixedlyed connected with side door (2), the other end of cylinder sleeve (9) is equipped with fluid cylinder end cap (13), the inner chamber of each cylinder sleeve (9) is a step, be provided with the piston (8) and the flashboard axis (7) that connect as one, the axle core of piston (8) is set with securing rod (11) by sliding sleeve (10), sliding sleeve (10) passes through the screw thread socket with securing rod (11), securing rod (11) passes outside the fluid cylinder end cap (13), the flashboard axis (7) of two single fluid cylinders (4) passes side door (2) back and all links to each other with intermediate bar (12), and intermediate bar (12) links to each other with flashboard assembly (33); Securing rod (11) is connected with drive unit (24) by transmission device (26),

Each piston (8) is made up of piston head (15) and piston body (16), piston head (15) is corresponding with cylinder sleeve (9) inner stepped with piston body (16), piston (8) is divided into cylinder sleeve (9) inside closes chamber (18), intermediate cavity (19), unlatching chamber (20), opens chamber (20) external diameter less than closing chamber (18); Have the hydraulic oil port A (21) that closes chamber (18) at fluid cylinder end cap (13), on cylinder sleeve (9) big circumference, have the hydraulic oil port B (22) of intermediate cavity (19), have the hydraulic oil port C (23) that opens chamber (20) at side door (2).

3. biliquid cylinder ram preventer according to claim 1 is characterized in that: described piston (8) for single diameter the axle or with a plurality of steps the axle.

4. biliquid cylinder ram preventer according to claim 1 is characterized in that: be provided with sealing ring (14) separately on described piston head (15) and the piston body (16).