CN202023527U

CN202023527U - Blowout preventer

Info

Publication number: CN202023527U
Application number: CN2011201221037U
Authority: CN
Inventors: 徐密; 张大东; 郑凯; 耿辉; 朱林峰; 张岩
Original assignee: Shandong Linqu Qiancheng Petroleum Machinery Co Ltd
Current assignee: Shandong Linqu Qiancheng Petroleum Machinery Co Ltd
Priority date: 2011-04-25
Filing date: 2011-04-25
Publication date: 2011-11-02
Anticipated expiration: 2021-04-25

Abstract

The utility model discloses a blowout preventer used for well repairing operations of an oil field. The blowout preventer comprises a pipe-shaped shell body, a pipeline clamping assembly, a pipeline cutting assembly and a full-sealing assembly, wherein the pipeline clamping assembly, the pipeline cutting assembly and the full-sealing assembly are sequentially inserted on the shell body from top to bottom. The pipeline clamping assembly comprises a pipeline clamping hydraulic cylinder, a pipeline clamping piston, a pipeline clamping teeth base and pipeline clamping teeth; and the pipeline clamping piston, the pipeline clamping teeth base and the pipeline clamping teeth are arranged in the pipeline clamping hydraulic cylinder. The pipeline cutting assembly comprises a pipeline cutting hydraulic cylinder, a pipeline cutting piston, a cutter base and a cutter; and the pipeline cutting piston, the cutter base and the cutter are arranged in the pipeline cutting hydraulic cylinder. The full-sealing assembly comprises a full-sealing hydraulic cylinder, a sealed rubber block base and a sealed rubber block; and the sealed rubber block base and the sealed rubber block are connected with a full-sealing piston by a piston rod. The pipeline clamping teeth, the cutter and the sealed rubber block are all arranged in an inner cavity of the shell body. In the well repairing process of an oil well, when the blowout is caused due to the pressure change in the oil well, and the oil well is out of control, the emergency treatment can be performed by the blowout preventer, namely, an oil pipe is clamped by the pipeline clamping assembly and is cut by the pipeline cutting assembly, and the mouth of the well is sealed by the full-sealing assembly, thereby completing the control on the blowout.

Description

A kind of preventer

Technical field

The utility model relates to a kind of oil field device that prevents blowout, promptly a kind of preventer; In workover treatment, prevent the preventer that changes and blowout takes place and should adopt when out of hand owing to borehole pressure at oil field oil, gas, well.

Background technology

At present, during to oil, gas, well operation, the generation blowout because borehole pressure changes, in well, have under the situation of oil pipe, can only seal the annular space of oil pipe and sleeve pipe, promptly carry out half envelope, and the sealing mechanism of half envelope lost efficacy easily, in case lost efficacy, will cause blowout out of hand, can cause the infringement of people, thing, environment.

Summary of the invention

The technical problems to be solved in the utility model is at above-mentioned deficiency, to provide a kind of preventer of carrying out the full envelope of well head closed allround when blowout out of control.

For achieving the above object, the utility model is by the following technical solutions:

A kind of preventer described in the utility model, comprise the housing of tubulose and from bottom to top enumerate the card pipe assembly that is arranged on the housing successively, cut pipe assembly, seal assembly entirely, it is characterized in that: described card pipe assembly comprises the card pipe hydraulic cylinder that radially is inserted on the housing, be installed in card pipe piston in the card pipe hydraulic cylinder, be connected to card pipe tooth seat on the card pipe piston, be installed in the card pipe tooth of card pipe tooth seat inboard by piston rod, and at least two overlap and block pipe assemblies and is symmetricly set on the housing; The described pipe assembly of cutting comprises and radially is inserted into cutting the pipe hydraulic cylinder, be installed in and cut pipe cutting the pipe piston, be connected to the scissors seat cut on the pipe piston, be installed in the shear knife on the scissors seat by piston rod in the hydraulic cylinder on the housing; Described full envelope assembly comprises the full sealing liquid cylinder pressure that radially is inserted on the housing, be installed in full envelope piston in the full sealing liquid cylinder pressure, be connected to fluid sealant block on the full envelope piston, be installed in the sealed gluing block on the fluid sealant block by piston rod; Described card pipe tooth, shear knife, sealed gluing block all are arranged in the inner chamber of housing; Described card pipe hydraulic cylinder, cut the pipe hydraulic cylinder, full sealing liquid cylinder pressure is connected to hydraulic control device by oil circuit.

After adopting technique scheme, this preventer is connected on the oil country tubular good by the flange at two ends, in a single day blowout out of control takes place in workover treatment, lower floor's card pipe assembly chucking oil pipe of this preventer, the intermediate layer is cut pipe assembly and is cut off oil pipe, and external oil pipe proposes, the full sealing mechanism sealing in upper strata well head, can control blowout effectively, prevent gas blowout accident, avoid loss.The operation simple in structure, easy of this preventer, good sealing effect.

Description of drawings

Fig. 1 partly cuts open structural representation for the utility model.

The specific embodiment

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

As shown in Figure 1, a kind of preventer described in the utility model comprises the housing 1 of tubulose and from bottom to top enumerates the card pipe assembly that is arranged on the housing 1 successively, cuts pipe assembly, seals assembly entirely that the two ends up and down of housing 1 are provided with flange; Described card pipe assembly is positioned at orlop, comprise the card pipe hydraulic cylinder 6 that radially is inserted on the housing 1, be installed in card pipe piston 5 in the card pipe hydraulic cylinder 6, be connected to card pipe tooth seat 4 on the card pipe piston 5, be installed in the card pipe tooth 3 that card is managed tooth seat 4 inboards by piston rod, at least two cover card pipe assemblies are symmetricly set on the housing 1, when card pipe piston 5 moves to the inside, the card pipe tooth 3 that is positioned at the oil pipe both sides is held oil pipe tightly, makes it stiff; The described pipe assembly of cutting is positioned at the intermediate layer, comprises radially being inserted into cutting pipe hydraulic cylinder 10, be installed in and cut cutting pipe piston 11, be connected to the scissors seat 9 cut on the pipe piston 11, be installed in the shear knife 8 on the scissors seat 9 by piston rod in the pipe hydraulic cylinder 10 on the housing 1; Cut pipe assembly and can adopt a cover, also can adopt many covers to be symmetrical arranged, when cutting pipe piston 11 and move to the inside, shear knife 8 is cut off oil pipe, so that the upper end oil pipe that will cut removes.Described full envelope assembly is positioned at the superiors, comprises the full sealing liquid cylinder pressure 15 that radially is inserted on the housing 1, is installed in full envelope piston 16 in the full sealing liquid cylinder pressure 15, is connected to fluid sealant block 14 on the full envelope piston 16, is installed in the sealed gluing block 13 on the fluid sealant block 14 by piston rod; Full envelope assembly can adopt a cover, also can adopt many covers to be symmetrical arranged, and when sealing piston 16 entirely and move to the inside, sealed gluing block 13 moves on the fracture of the oil pipe of cutting off, and with the oil pipe port closed, reaches totally enclosed purpose; Described card pipe tooth 3, shear knife 8, sealed gluing block 13 all are arranged in the inner chamber of housing 1; Described card pipe hydraulic cylinder 6, cut pipe hydraulic cylinder 10, full sealing liquid cylinder pressure 15 and be connected to hydraulic control device by oil circuit.The structure of each hydraulic cylinder and hydraulic control device are known technology, need not to give unnecessary details at this.The oil circuit that is connected to each hydraulic cylinder can be arranged on the outer end of hydraulic cylinder, also can on the tube wall of housing 1 oil circuit be set as shown in Figure 1, and the correct position at housing 1 is provided with hydraulic oil pipe connector 2 simultaneously.

In use, by flange this preventer is installed on the oil country tubular good, in case have an accident, owing to changing, borehole pressure blowout takes place and when out of hand, connect hydraulic control device, the card pipe piston 5 of both sides in the lower floor card pipe assembly is moved, until card pipe tooth 3 chucking oil pipes to the center; The second step operation makes the shearing piston 11 on the shearing assembly in intermediate layer move to the center, cuts off oil pipe until shear knife 8, and external oil pipe is proposed by hoisting mechanism thereupon; The 3rd operation makes the full envelope piston 16 on the full envelope assembly move to the center, until the whole sealing well heads of sealed gluing block 13, finishes blowout control.

Claims

1. preventer, comprise the housing (1) of tubulose and from bottom to top enumerate the card pipe assembly that is arranged on the housing (1) successively, cut pipe assembly, seal assembly entirely, it is characterized in that: described card pipe assembly comprises the card pipe hydraulic cylinder (6) that radially is inserted on the housing (1), be installed in card pipe piston (5) in the card pipe hydraulic cylinder (6), be connected to card pipe tooth seat (4) on the card pipe piston (5), be installed in the inboard card pipe tooth (3) of card pipe tooth seat (4) by piston rod, and at least two overlap and block pipe assemblies and is symmetricly set on the housing (1); The described pipe assembly of cutting comprises and radially is inserted into cutting pipe hydraulic cylinder (10), be installed in and cut cutting pipe piston (11), be connected to the scissors seat (9) cut on the pipe piston (11), be installed in the shear knife (8) on the scissors seat (9) by piston rod in pipe hydraulic cylinder (10) on the housing (1); Described full envelope assembly comprises the full sealing liquid cylinder pressure (15) that radially is inserted on the housing (1), be installed in full envelope piston (16) in the full sealing liquid cylinder pressure (15), be connected to fluid sealant block (14) on the full envelope piston (16), be installed in the sealed gluing block (13) on the fluid sealant block (14) by piston rod; Described card pipe tooth (3), shear knife (8), sealed gluing block (13) all are arranged in the inner chamber of housing (1); Described card pipe hydraulic cylinder (6), cut pipe hydraulic cylinder (10), full sealing liquid cylinder pressure (15) is connected to hydraulic control device by oil circuit.