A shear full seal gate assembly

Abstract

The application discloses a shearing full sealing gate plate assembly, in particular to a cable blowout preventer shearing gate plate assembly with detachable embedded hard alloy shearing blades, which comprises an upper gate plate body, a lower gate plate body, a sealing half ring, a gate plate, a fixing screw, an upper shearing cutter, a lower shearing cutter and the like; the main function of the device is that when the cable blowout preventer is working, the shearing gate plate assembly can be pushed by the blowout preventer driving oil cylinder in necessary cases, the cable is sheared by the shearing blades, and the gate plate assembly and the gate plate cavity form a sealed block to prevent the overflow of the well mouth medium; since the blades are detachable, the blades can be replaced at any time when damaged, the material utilization rate is greatly improved, meanwhile, the shearing blades adopt a V-shaped acute angle structure embedded with hard alloy, the sharpness of the cutting is greatly improved, the cut cable is more neat, the probability of the shearing residual wire is greatly reduced, and the subsequent processing of the cable is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of oil and gas development cable blowout preventer, and particularly relates to a shearing full sealing ram assembly. BACKGROUND

[0002] In the process of oil and gas exploitation cable operation, it is inevitable to encounter the problems of tool sticking or cable loosening after being disconnected from the bottom. In this case, the cable may be cut in the middle, the inlet is sealed by the blowout preventer, and then fishing is performed.

[0003] During the operation of the cable blowout preventer, the shearing ram assembly can be pushed by the driving cylinder of the blowout preventer in necessary cases, the cable is cut by the shearing blade, and the ram assembly and the ram cavity form a seal to block the overflow of the wellhead medium. However, the existing shearing full sealing ram assembly blade cannot be replaced, the use cost is high, the sharpness of the cutting decreases after multiple uses, the cut cable is not neat, and the cable is prone to have continuous wires after shearing, which is not convenient for subsequent processing of the cable. Therefore, how to develop a new type of shearing full sealing ram assembly has become a problem to be solved by the technical personnel in the field. SUMMARY

[0004] The purpose of the present application is to provide a shearing full sealing ram assembly to solve the problems of the existing shearing full sealing ram assembly blade, which cannot be replaced, has high use cost, has decreased sharpness of cutting after multiple uses, has not neat cut cable, and is prone to have continuous wires after shearing, which is not convenient for subsequent processing of the cable.

[0005] To solve the above technical problems, the present application adopts the following technical solutions:

[0006] The shearing full sealing ram assembly comprises an upper ram body and a lower ram body. The upper ram body is a cylindrical structure, a V-shaped cable guide structure is arranged at the upper end position of the working surface of the upper ram body, a detachable upper shearing blade is arranged on the lower surface of the V-shaped cable guide structure, a rectangular groove matched with the front seal is arranged at the middle position of the working surface of the upper ram body, and a V-shaped cable positioning structure is arranged at the lower end position of the working surface of the upper ram body. The lower ram body is a cylindrical structure, a V-shaped cable guide structure is arranged at the upper end position of the working surface of the lower ram body, a detachable lower shearing blade is arranged on the upper surface of the V-shaped cable guide structure, a rectangular groove matched with the front seal is arranged at the middle position of the working surface of the lower ram body, and a V-shaped cable positioning structure is arranged at the lower end position of the working surface of the lower ram body.

[0007] Further, the V-shaped cable guide structure of the upper ram body is engaged with the V-shaped cable guide structure of the lower ram body, and the V-shaped cable positioning structure of the upper ram body is engaged with the V-shaped cable positioning structure of the lower ram body.

[0008] Further, the upper and lower shearing knives are engaged; the front seal of the upper gate body is in contact with the front seal of the lower gate body.

[0009] Further, the driving surface of the upper gate body is provided with an upper gate piston connecting groove, and the driving surface of the lower gate body is provided with a lower gate piston connecting groove.

[0010] Further, the upper surface of the upper gate body is provided with an upper gate seal half-ring groove matched with a seal half-ring, and the upper surface of the lower gate body is provided with a lower gate seal half-ring groove matched with a seal half-ring.

[0011] Further, the V-shaped cable positioning structure of the upper gate body is provided with a through upper gate guide hole and an upper gate mud hole, and the V-shaped cable positioning structure of the lower gate body is provided with a through lower gate guide hole and a lower gate mud hole.

[0012] Further, the front seal comprises a metal rib plate and a rubber body, the upper and lower surfaces of the rubber body are each provided with a metal rib plate, and the metal rib plate is provided with a fixing groove matched with a top pin in the upper gate fixed screw hole or the lower gate fixed screw hole and a gate fixed screw.

[0013] Further, the upper shearing knife is embedded with an upper shearing knife blade made of hard alloy material, the upper shearing knife fixing hole on the upper shearing knife is connected with the upper shearing knife fixing screw hole on the upper gate body through an upper shearing knife fixing screw, the lower shearing knife is embedded with a lower shearing knife blade made of hard alloy material, and the lower shearing knife fixing hole on the lower shearing knife is connected with the lower shearing knife fixing screw hole on the lower gate body through a lower shearing knife fixing screw.

[0014] Further, the seal half-ring is a semi-circular ring structure, and both sides are provided with a semi-elliptical rubber body.

[0015] Compared with the prior art, the present application has the following beneficial technical effects:

[0016] The shear full sealing gate plate assembly of the present application has good cooperation of semi-ring seal and front seal, greatly improves the sealing reliability and processing workability; the V-shaped cable positioning structure and the V-shaped computer guiding structure of the blade front end of the shear full sealing gate plate assembly further ensure the probability of the cable being aligned to the position of the hard alloy blade edge in the middle of the blade during use of the gate plate; the replaceable blade embedded with hard alloy of the shear full sealing gate plate assembly reduces the use cost of the user, and the inclined blade of the hard alloy greatly improves the neatness of the sheared cable, greatly avoids the probability of the cable being continuously sheared after being sheared, and facilitates subsequent processing of the cable; the T-shaped groove connection design of the rear of the gate plate body and the piston of the shear full sealing gate plate assembly is very convenient for connection with the piston; the guiding hole on the gate plate body can ensure that the V-shaped protrusion can be accurately entered into the V-shaped groove of the other gate plate body during the movement of the upper and lower gate plates, the mud hole of the gate plate body can ensure that the well fluid, oil sludge and the like can be quickly circulated on the left and right of the gate plate when the gate plate is closed, greatly reduces the opening and closing resistance of the gate plate, and the front seal with the metal rib plate can withstand a large fluid pressure. In general, the shear full sealing gate plate assembly of the present application can replace the damaged blade at any time due to the detachable blade, greatly improves the material utilization rate, and the V-shaped acute angle structure of the shearing blade embedded with hard alloy greatly improves the sharpness of the cutting, makes the cut cable more neat, greatly reduces the probability of the cable being continuously sheared after being sheared, and facilitates subsequent processing of the cable. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described in connection with the accompanying drawings:

[0018] Figure 1 It is a front view of the shear full sealing gate plate assembly of the present application;

[0019] Figure 2 It is an axonometric view of the shear full sealing gate plate assembly of the present application;

[0020] Figure 3 It is a plan view of the shear full sealing gate plate assembly of the present application;

[0021] Figure 4 It is a front view of the upper gate plate body;

[0022] Figure 5 It is a plan view of the upper gate plate body;

[0023] Figure 6 It is an axonometric view of the upper gate plate body (angle one);

[0024] Figure 7 It is an axonometric view of the upper gate plate body (angle two);

[0025] Figure 8 It is a front view of the semi-ring seal;

[0026] Figure 9 It is aFigure 8 Cross-sectional view of the sealing half-ring;

[0027] Figure 10 Top view of the sealing half-ring;

[0028] Figure 11 Axonometric view of the sealing half-ring

[0029] Figure 12 Front view of the front seal;

[0030] Figure 13 Top view of the front seal;

[0031] Figure 14 Axonometric view of the front seal;

[0032] Figure 15 Front view of the lower gate body;

[0033] Figure 16 Top view of the lower gate body;

[0034] Figure 17 Axonometric view of the lower gate body (angle one);

[0035] Figure 18 Axonometric view of the lower gate body (angle two);

[0036] Figure 19 Top view of the upper shear cutter;

[0037] Figure 20 Axonometric view of the upper shear cutter;

[0038] Figure 21 Top view of the lower shear cutter;

[0039] Figure 22 Axonometric view of the lower shear cutter.

[0040] BRIEF DESCRIPTION OF REFERENCE NUMERALS: 1, upper gate body; 1-1, upper gate sealing half-ring groove; 1-2, upper gate fixing screw hole; 1-3, upper shear cutter fixing screw hole; 1-4, upper gate piston connecting groove; 1-5, upper gate guide hole; 1-6, upper gate mud hole; 2, sealing half-ring; 3, front seal; 3-1, metal rib plate; 3-2, rubber body; 3-3, fixing groove; 4, upper shear cutter fixing screw; 5, upper shear cutter; 5-1, upper shear cutter blade; 5-2, upper shear cutter fixing hole; 6, lower shear cutter; 6-1, lower shear cutter blade; 6-2, lower shear cutter fixing hole; 7, lower shear cutter fixing screw; 8, gate fixing screw; 9, jackscrew; 10, lower gate body; 10-1, lower gate sealing half-ring groove; 10-2, lower gate fixing screw hole; 10-3, lower shear cutter fixing screw hole; 10-4, lower gate piston connecting groove; 10-5, lower gate guide hole; 10-6, lower gate mud hole. DETAILED DESCRIPTION

[0041] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0042] It should be noted that the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more than two, unless otherwise explicitly and specifically limited. The meaning of "several" is one or more than one, unless otherwise explicitly and specifically limited.

[0043] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0044] As shown in Figures 1 to 22 A shearing full seal gate plate assembly includes an upper gate plate body 1 and a lower gate plate body 10.

[0045] The upper gate plate body 1 is a cylindrical structure, a V-shaped cable guide structure is arranged at the upper end position of the working surface of the upper gate plate body 1, a detachable upper shearing cutter 5 is arranged on the lower surface of the V-shaped cable guide structure, a rectangular groove cooperating with the front seal 3 is arranged at the middle position of the working surface of the upper gate plate body 1, and a V-shaped cable positioning structure is arranged at the lower end position of the working surface of the upper gate plate body 1. An upper gate plate sealing half-ring groove 1-1 cooperating with the sealing half-ring 2 is arranged on the upper surface of the upper gate plate body 1.

[0046] The lower gate plate body 10 is a cylindrical structure, a V-shaped cable guide structure is arranged at the upper end position of the working surface of the lower gate plate body 10, a detachable lower shearing cutter 6 is arranged on the upper surface of the V-shaped cable guide structure, a rectangular groove cooperating with the front seal 3 is arranged at the middle position of the working surface of the lower gate plate body 1, and a V-shaped cable positioning structure is arranged at the lower end position of the working surface of the lower gate plate body 1. A lower gate plate sealing half-ring groove 10-1 cooperating with the sealing half-ring 2 is arranged on the upper surface of the lower gate plate body 10.

[0047] The V-shaped cable guiding structure of the upper gate body 1 is engaged with the V-shaped cable guiding structure of the lower gate body 10; the V-shaped cable positioning structure of the upper gate body 1 is engaged with the V-shaped cable positioning structure of the lower gate body 10.

[0048] The upper shear cutter 5 and the lower shear cutter 6 are engaged; the front seal 3 of the upper gate body 1 is in contact with the front seal 3 of the lower gate body 10.

[0049] The driving surface of the upper gate body 1 is provided with an upper gate piston connecting groove 1-4, and the driving surface of the lower gate body 10 is provided with a lower gate piston connecting groove 10-4; both the upper gate piston connecting groove 1-4 and the lower gate piston connecting groove 10-4 are T-shaped structures, which are convenient for connecting with the piston.

[0050] The V-shaped cable positioning structure of the upper gate body 1 is provided with a through upper gate guiding hole 1-5 and an upper gate mud hole 1-6; the V-shaped cable positioning structure of the lower gate body 10 is provided with a through lower gate guiding hole 10-5 and a lower gate mud hole 10-6.

[0051] The front seal 3 comprises metal rib plates 3-1 and rubber bodies 3-2; each of the upper and lower surfaces of the rubber body 3-2 is provided with a metal rib plate 3-1; the metal rib plate 3-1 is provided with a fixing groove 3-3 matched with the top pin 9 in the upper gate fixed screw hole 1-2 or the lower gate fixed screw hole 10-2 or the gate fixed screw 8; the combination of the top pin 9 and the gate fixed screw 8 is more conducive to preventing loosening. The sealing half ring 2 is a half circular ring structure, and both sides are provided with half-elliptical rubber bodies.

[0052] The upper shear cutter 5 is inlaid with an upper shear cutter blade 5-1 made of hard alloy material; the upper shear cutter fixed hole 5-2 on the upper shear cutter 5 is connected with the upper shear cutter fixed screw hole 1-3 on the upper gate body 1 through the upper shear cutter fixed screw 4; the lower shear cutter 6 is inlaid with a lower shear cutter blade 6-1 made of hard alloy material; the lower shear cutter fixed hole 6-2 on the lower shear cutter 6 is connected with the lower shear cutter fixed screw hole 10-3 on the lower gate body 10 through the lower shear cutter fixed screw 7. The cutting edges of the upper shear cutter blade 5-1 and the lower shear cutter blade 6-1 adopt V-shaped ports, and the cutting surfaces thereof have a certain one-way inclination angle.

[0053] The above-described embodiments are only used to describe the preferred modes of the present application, and do not limit the scope of the present application; under the premise of not departing from the design spirit of the present application, various modifications and improvements of the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A shearing fully enclosed gate assembly, characterized in that: It includes an upper gate body (1) and a lower gate body (10); the upper gate body (1) is a cylindrical structure, and a V-shaped cable guide structure is provided at the upper end of the working surface of the upper gate body (1). A detachable upper shearing blade (5) is provided on the lower surface of the V-shaped cable guide structure. A rectangular groove that mates with the front seal (3) is provided in the middle of the working surface of the upper gate body (1), and a V-shaped cable positioning structure is provided at the lower end of the working surface of the upper gate body (1); the lower gate body (10) is a cylindrical structure, and the working surface of the lower gate body (10) is... A V-shaped cable guide structure is provided at the upper end of the working surface. A detachable lower shearing blade (6) is provided on the upper surface of the V-shaped cable guide structure. A rectangular groove that mates with the front seal (3) is provided in the middle of the working surface of the lower gate plate body (10). A V-shaped cable positioning structure is provided at the lower end of the working surface of the lower gate plate body (10). The V-shaped cable guide structure of the upper gate plate body (1) and the V-shaped cable guide structure of the lower gate plate body (10) are engaged. The V-shaped cable positioning structure of the upper gate plate body (1) and the V-shaped cable positioning structure of the lower gate plate body (10) are engaged. The cable positioning structure is engaged; the upper shearing blade (5) and the lower shearing blade (6) are engaged; the front seal (3) of the upper gate body (1) is in contact with the front seal (3) of the lower gate body (10); the upper shearing blade (5) is inlaid with an upper shearing blade (5-1) made of hard alloy material, and the upper shearing blade fixing hole (5-2) on the upper shearing blade (5) is connected to the upper shearing blade fixing screw hole (1-3) on the upper gate body (1) through the upper shearing blade fixing screw (4); the lower shearing blade (6) is inlaid with a shearing blade made of hard alloy material. The lower shear blade (6-1) is made of cemented carbide. The lower shear blade fixing hole (6-2) on the lower shear blade (6) is connected to the lower shear blade fixing screw hole (10-3) on the lower gate body (10) by the lower shear blade fixing screw (7). The upper gate body (1) has a through upper gate guide hole (1-5) and an upper gate mud hole (1-6) on its V-shaped cable positioning structure. The lower gate body (10) has a through lower gate guide hole (10-5) and a lower gate mud hole (10-6) on its V-shaped cable positioning structure.

2. The shearing fully enclosed gate assembly according to claim 1, characterized in that: The upper gate body (1) has an upper gate piston connecting groove (1-4) on its driving surface, and the lower gate body (10) has a lower gate piston connecting groove (10-4) on its driving surface.

3. The shearing fully enclosed gate assembly according to claim 1, characterized in that: The upper surface of the upper gate body (1) is provided with an upper gate sealing half-ring groove (1-1) that cooperates with the sealing half-ring (2), and the upper surface of the lower gate body (10) is provided with a lower gate sealing half-ring groove (10-1) that cooperates with the sealing half-ring (2).

4. The shearing fully enclosed gate assembly according to claim 1, characterized in that: The front seal (3) includes a metal rib plate (3-1) and a rubber body (3-2). A metal rib plate (3-1) is provided on the upper and lower surfaces of the rubber body (3-2). The metal rib plate (3-1) is provided with a fixing groove (3-3) that cooperates with the set screw (9) and the gate fixing screw (8) in the upper gate fixing screw hole (1-2) or the lower gate fixing screw hole (10-2).

5. The shearing fully enclosed gate assembly according to claim 3, characterized in that: The sealing half-ring (2) is a semi-circular ring structure with semi-elliptical rubber bodies on both sides.

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