Composite structure cable blowout preventer

Abstract

The utility model discloses a composite structure cable blowout preventer which comprises a shell, the shell is of a hollow structure, flashboard assemblies are symmetrically installed on the side faces of the shell, a front sealing structure is installed at the front end of each flashboard assembly, a hydraulic cylinder is installed at the rear end of each flashboard assembly, and the hydraulic cylinder is connected with the shell. A hollow structure is arranged at the front end of the flashboard assembly, a grease injection channel communicated with the hollow structure is arranged in the flashboard assembly, and after the flashboard assembly is closed, an armored cable is tightened and used for sealing a wellhead through the cable when cable accidents such as cable clamping and wire jumping happen to the cable. Grease injection sealing can be achieved in a pair of flashboards, and the size and the weight of the blowout preventer are greatly simplified.

Description

TECHNICAL FIELD

[0001] The utility model relates to petroleum equipment technical field especially relates to a composite structure cable blowout preventer. BACKGROUND

[0002] A composite structure cable blowout preventer, its structural design adopts single gate board structure, and its gate board adopts composite gate board front seal, and there is a slotted space at the front end rubber seal cable part for injecting sealing grease when sealing the cable, realizing the grease injection sealing of armored cable, and a gate board locking device is designed to ensure the normal sealing function of the gate board during high pressure sealing, and the gate board of the cable blowout preventer is designed, and the conventional cable blowout preventer cannot completely seal the armored cable due to the rubber, so it must be configured as double gate board, and the grease is injected between the two gate boards to realize complete sealing, and the structure increases the weight and cost of the blowout preventer. SUMMARY

[0003] In view of the above defects or deficiencies, the utility model aims at providing a composite structure cable blowout preventer.

[0004] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0005] A composite structure cable blowout preventer, comprising: a shell, the shell is a hollow structure, a gate board assembly is symmetrically installed on the side of the shell, a front sealing structure is installed at the front end of the gate board assembly, a liquid cylinder is installed at the rear end of the gate board assembly, an injection channel is arranged in the gate board assembly and is communicated with the hollow structure, and the armored cable is clamped when the gate board assembly is closed.

[0006] The front sealing structure is internally provided with an injection channel and an injection space, which are communicated with the gate board assembly.

[0007] The front sealing structure comprises: a rubber body, a groove for accommodating sealing grease is formed in the rubber body, first and second iron pads are arranged on the upper and lower surfaces of the rubber body respectively, an injection hole is horizontally formed in the center of the groove, a semicircular through hole for clamping the armored cable is formed in the center of the rubber body, and an injection hole is horizontally formed in the center of the groove.

[0008] Third and fourth iron pads are arranged on the two sides of the groove.

[0009] The gate board assembly comprises: a gate board body, a gate board sealing block is arranged at the front end of the gate board body, and the gate board sealing block cooperates with the sealing when the gate board body is closed.

[0010] The gate board sealing block is a bevel structure.

[0011] A gate board locking block for limiting the gate board body is installed at the rear end of the gate board body.

[0012] The liquid cylinder is internally provided with a piston, and the end of the liquid cylinder is provided with an end cover.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The utility model provides a composite structure cable blowout preventer for processing cable accidents such as cable jamming and wire jumping, and sealing cable wellheads, since the front end of the gate plate assembly is provided with the front sealing structure, the grease injection and sealing functions can be realized in one gate plate, and the size and weight of the blowout preventer are greatly simplified.

[0015] Further, since the integrated pad iron mechanism is arranged on the rubber body, and the space for injecting the sealing grease to seal the cable is arranged in the rubber body, the functions of grease injection and sealing can be realized in one gate plate, the functions realized by the original gate plate are integrated in one gate plate, the labor intensity of on-site operation is reduced, and the safety is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structure schematic diagram of the utility model composite structure cable blowout preventer Figure One ;

[0017] Figure 2 It is the structure schematic diagram of the utility model composite structure cable blowout preventer Figure Two ;

[0018] Figure 3 It is the front sealing structure schematic diagram of the utility model Figure One ;

[0019] Figure 4 It is the front sealing structure schematic diagram of the utility model Figure Two ;

[0020] Figure 5 It is the structure schematic diagram of the utility model gate plate assembly Figure One ;

[0021] Figure 6 It is the structure schematic diagram of the utility model gate plate assembly Figure Two .

[0022] In the drawing, 1 - shell body, 2 - gate plate assembly, 3 - liquid cylinder, 4 - piston, 5 - end cover, 6 - front sealing structure, 7 - armored cable, 21 - gate plate body, 22 - gate plate sealing block, 23 - gate plate locking block, 61 - rubber body, 62 - first pad iron, 63 - second pad iron, 64 - third pad iron, 65 - fourth pad iron, 66 - recess, 67 - grease injection hole, 68 - semicircular through hole. DETAILED DESCRIPTION

[0023] The present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0024] like Figure 1 , 2 As shown, a composite structure cable blowout preventer includes: a housing 1, the housing 1 being a hollow structure, a gate assembly 2 symmetrically mounted on the side of the housing, a front sealing structure 6 mounted at the front end of the gate assembly 2, a hydraulic cylinder 3 mounted at the rear end of the gate assembly 2, a grease injection channel connected to the hollow structure being provided inside the gate assembly 2, and when the gate assembly 2 is closed, a armored cable 7 is tightened; a piston 4 is installed inside the hydraulic cylinder 3, and an end cap 5 is installed at the end of the hydraulic cylinder 3.

[0025] Specifically, such as Figure 3 , 4 As shown, the front sealing structure 6 has a grease injection channel and a grease injection space that communicate with the gate assembly 2. The front sealing structure 6 includes: a rubber body 61, on which a groove 66 for receiving sealing grease is formed; first and second pads 62 and 63 are respectively provided on the upper and lower surfaces of the rubber body 61; a grease injection hole 67 is horizontally formed in the center of the groove 66; a semi-circular through hole 68 for tightening the armored cable 7 is formed in the center of the rubber body 61; and a grease injection hole 67 is horizontally formed in the center of the groove 66. Preferably, third and fourth pads 64 and 65 are provided on both sides of the groove 66; the grooves 66 of the rubber body 61 cooperate with each other to form a complete space for injecting sealing grease to seal the cable.

[0026] like Figure 5 , 6 As shown, the gate assembly 2 includes: a gate body 21, and a gate sealing block 22 is provided at the front end of the gate body 21. When the gate body 21 is closed, the gate sealing block 22 cooperates to seal. The gate sealing block 22 has an inclined structure.

[0027] In addition, a gate locking block 23 is installed at the rear end of the gate body 21 to limit the movement of the gate body 21. The gate locking block 23 is connected as a whole by screws, such as Figure 2 As shown, after the gate is closed and high-pressure sealing grease is injected, its pressure flows through the gate channel and exerts pressure on the left and right gates, making the gates fit more tightly and achieving a stable seal.

[0028] In the utility model, the gate assembly 2 is installed in the blowout preventer shell 1, when the gate is closed, the two side pistons 4 are pushed to move towards each other by external hydraulic pressure, so as to push the closed gate, after the cable is clamped by the front sealing structure 6 in front of the gate, because the armored cable 7 cannot be completely sealed by rubber due to the surface gap, therefore high pressure and high viscosity sealing grease is injected into the composite front sealing to fill the cable surface gap, so as to realize complete sealing of the cable, and the high pressure sealing grease flows to the rear end space of the gate locking block at the rear end of the two side gates through the specially designed channel, the high pressure sealing grease generates opposite direction force to the two side gate locking blocks, so that the gate clamps the cable more stably and reliably, realizes reliable sealing, and the function of the double gate of the common blowout preventer can be realized by one gate.

[0029] For those skilled in the art, it is obvious that the above specific examples are only preferred schemes of the utility model, therefore the improvement and change of some parts of the utility model by those skilled in the art still embodies the principle of the utility model, realizes the purpose of the utility model, and belongs to the range protected by the utility model.

Claims

1. A composite structure cable blowout preventer, characterized by, Include: The shell (1) is a hollow structure, the shell (1) side symmetry is equipped with the shutter assembly (2), the front end of the shutter assembly (2) is equipped with the front sealing structure (6), the rear end of the shutter assembly (2) is equipped with the liquid cylinder (3), the shutter assembly (2) is provided with the grease injection channel communicated with the hollow structure, when the shutter assembly (2) is closed, the armored cable (7) is tightened;The front sealing structure (6) is provided with the grease injection channel and the grease injection space communicated with the shutter assembly (2);The front sealing structure (6) comprises: a rubber body (61), a groove (66) for accommodating sealing grease is formed in the rubber body (61), the upper and lower surfaces of the rubber body (61) are respectively provided with first and second iron pads (62,63), the center of the groove (66) is horizontally provided with a grease injection hole (67), and the center of the rubber body (61) is provided with a semicircular through hole (68) for tightening the armored cable (7).

2. The composite structure cable blowout preventer of claim 1, wherein, The two sides of the groove (66) are provided with third and fourth iron pads (64,65).

3. The composite structural cable blowout preventer of claim 1, wherein, The shutter assembly (2) comprises: a shutter body (21), the front end of the shutter body (21) is provided with a shutter sealing block (22), when the shutter body (21) is closed, the shutter sealing block (22) is matched and sealed.

4. The composite structural cable blowout preventer of claim 3, wherein, The shutter sealing block (22) is a slope structure.

5. The composite structural cable blowout preventer of claim 4, wherein, The rear end of the shutter body (21) is provided with a shutter locking block (23) for limiting the shutter body (21).

6. The composite structural cable blowout preventer of claim 1, wherein, The liquid cylinder (3) is provided with a piston (4), and the end of the liquid cylinder (3) is provided with an end cover (5).

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