Oil field wellhead liquid receiving box

Abstract

The utility model relates to the technical field of oil field workover treatment, in particular to an oil field wellhead liquid receiving box. The oil field wellhead liquid receiving box comprises two half box bodies with the same specification, a vertical half pipe and a transverse half pipe are fixedly embedded in the inner walls of the half box bodies, and a half cover is installed on the vertical half pipe; a circle of semi-ring air bag is fixedly embedded in the outer wall of the half cover, and the outer bag wall of the semi-ring air bag is fixedly connected with the inner ring wall, close to the top, of the vertical half pipe. According to the oil field wellhead liquid receiving box, the half-ring air bag on the half-body cover can effectively seal the connecting position of the half-body box and the half-body cover, and meanwhile when an oil production wellhead four-way pipe vibrates, the half-ring air bag can avoid connection failure and sealing failure of the half-body box and the half-body cover; and overflow liquid generated during disassembly and assembly of the wellhead flows out and then flows into the liquid accumulation cavity through falling on the inclined plate disc, so that overflow generated during disassembly and assembly of the operation wellhead does not fall to the ground to pollute a well site, and environment-friendly operation is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of oilfield well repairing operations, in particular to an oilfield wellhead liquid receiving box. Background Art

[0002] At present, the wellhead overflow control method adopted for oil field oil pipe lifting and lowering operation is to install a well repair operation liquid receiving platform at the wellhead, dig a liquid accumulation pit near the wellhead, and lay anti-seepage cloth around the wellhead. The urgent problem to be solved in digging the liquid accumulation pit near the wellhead is pollution of the well site and high labor intensity for employees; the urgent problem to be solved in laying the anti-seepage cloth around the wellhead is that the accumulated liquid cannot be recovered 360°, and the anti-seepage cloth is thin and easy to damage, with poor environmental protection effect. The ground decoration well operation liquid receiving platform is not sealed with the operating wellhead, and the environmental protection liquid receiving effect is poor.

[0003] Therefore, it is necessary to provide a new oilfield wellhead liquid receiving box to solve the above-mentioned technical problems. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an oilfield wellhead liquid receiving box.

[0005] The oilfield wellhead liquid receiving box provided by the utility model comprises two half boxes of the same specification, and a liquid accumulation cavity is arranged in the half boxes, and the oilfield wellhead liquid receiving box is formed by splicing the two half boxes;

[0006] A vertical half pipe and a horizontal half pipe are fixedly embedded on the inner wall of the half box, and the vertical half pipe and the horizontal half pipe intersect with each other, and a half cover is installed on the vertical half pipe;

[0007] A semi-circular airbag is fixedly embedded in the outer wall of the half cover, and the outer wall of the semi-circular airbag is fixedly connected to the inner wall of the vertical half tube near the top, and the outer wall of the semi-circular airbag is connected to the bottom of the arc-shaped air storage cavity opened in the vertical half tube through the air guide tube;

[0008] The vertical half pipe is provided with an air-increasing component for driving the semi-annular airbag to elastically expand.

[0009] Preferably, the air injection assembly includes an arc-shaped piston plate, which is slidably installed in the arc-shaped air storage chamber and slidably connected to the arc-shaped air storage chamber, and a rotatably connected threaded rod is installed on the arc-shaped piston plate, the threaded rod passes through a threaded through hole opened at the top of the arc-shaped air storage chamber and is threadedly connected to the threaded through hole, and a knob is fixedly installed on the rod head of the threaded rod.

[0010] Preferably, the outer ring wall of the half box is fixedly mounted with an outer edge, and the outer edge is provided with symmetrically distributed insertion holes A, and after two half boxes are spliced ​​together to form an oilfield wellhead liquid receiving box, U-shaped fixing rods are inserted into the insertion holes A on the two corresponding spliced ​​outer edges.

[0011] Preferably, an inclined plate disc is fixedly engaged on the top of the half cover, and symmetrically distributed insertion holes B are provided on the inclined plate disc. After the two half boxes are spliced ​​together to form an oilfield wellhead liquid receiving box, a U-shaped fixing rod is inserted into the insertion holes B on the two correspondingly spliced ​​inclined plate discs.

[0012] Preferably, a sealing strip is fixedly embedded on the spliced ​​inner wall of the half box.

[0013] Preferably, semicircular threaded pipes communicating with the transverse half pipes are fixedly embedded on both sides of the half box, and after the two half boxes are spliced ​​to form an oilfield wellhead receiving box, threaded collars are sleeved on the two corresponding semicircular threaded pipes.

[0014] Compared with the related art, the oilfield wellhead liquid receiving box provided by the utility model has the following beneficial effects:

[0015] The semi-annular airbag on the half cover of the utility model can effectively seal the connection between the half box and the half cover. At the same time, when the four-way pipe at the oil wellhead vibrates, the semi-annular airbag can avoid failure of the connection and sealing between the half box and the half cover. The overflow liquid generated when disassembling the wellhead flows out and falls on the inclined plate disc to flow into the liquid accumulation cavity, that is, the overflow generated when disassembling the operating wellhead does not fall to the ground to pollute the well site, thereby achieving environmentally friendly operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural schematic diagram of a preferred embodiment of the oilfield wellhead liquid receiving box provided by the utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the connection structure between the half-body box and the half-body cover shown;

[0018] Figure 3 for Figure 2 A schematic diagram of the structure of the half-body box shown;

[0019] Figure 4 for Figure 3 A schematic cross-sectional view of the half box shown;

[0020] Figure 5 for Figure 2 Schematic diagram of the structure of the half cover shown.

[0021] Numbers in the figure: 1, half box; 1a, liquid accumulation chamber; 1b, vertical half pipe; 1c, horizontal half pipe; 1d, arc-shaped air storage chamber; 1e, threaded through hole; 11, outer edge; 11a, insertion hole A; 12, semicircular threaded tube; 13, sealing strip; 14, air guide tube; 2, half cover; 21, inclined plate disc; 21a, insertion hole B; 3, semi-ring airbag; 4, air increase assembly; 41, arc-shaped piston plate; 42, threaded rod; 43, knob; 5, U-shaped fixing rod; 6, threaded collar. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0024] See also Figures 1 to 5 The utility model provides an oilfield wellhead liquid receiving box in an embodiment, and the oilfield wellhead liquid receiving box comprises a half box 1 and a half cover 2.

[0025] In the embodiments of the present invention, please refer to Figures 1 to 5 The half box 1 is provided with a liquid accumulation chamber 1a, and two half boxes 1 are spliced ​​together to form an oilfield wellhead liquid receiving box, and a vertical half pipe 1b and a horizontal half pipe 1c are fixedly embedded on the inner wall of the half box 1, and the vertical half pipe 1b and the horizontal half pipe 1c intersect with each other, and an outer edge 11 is fixedly installed on the outer ring wall of the half box 1, and symmetrically distributed insertion holes A11a are opened on the outer edge 11. After the two half boxes 1 are spliced ​​together to form an oilfield wellhead liquid receiving box, U-shaped fixing rods 5 are inserted into the insertion holes A11a on the two corresponding outer edges 11.

[0026] It should be noted that: two half-boxes 1 of the same specifications are folded together and buckled on the lower part of the large flange on the upper part of the wellhead four-way, and the two combined horizontal half-pipes 1c are mounted on the horizontal pipes on both sides of the oil wellhead four-way to fix the up and down directions, and the two vertical half-pipes 1b are mounted on the riser of the oil wellhead four-way. After completion, the U-shaped fixing rod 5 is inserted into the insertion hole A11a opened on the outer edge 11 of the two half-boxes 1 after they are spliced ​​to form the oilfield wellhead liquid receiving box, so as to realize the fixation of the two half-boxes 1;

[0027] A sealing strip 13 is fixedly embedded on the joint inner wall of the half-box 1, which improves the sealing performance when the two half-boxes 1 are connected;

[0028] Both sides of the half box 1 are fixedly embedded with a semicircular threaded pipe 12 connected to the horizontal half pipe 1c. Two half boxes 1 are spliced ​​to form an oilfield wellhead liquid receiving box. The two semicircular threaded pipes 12 corresponding to each other are sleeved with a threaded collar 6, which improves the stability of the bottom of the wellhead liquid receiving box after the two half boxes 1 are connected.

[0029] In the embodiments of the present invention, please refer to Figures 1 to 5 , a half-body cover 2 is installed on the vertical half-tube 1b, and a circle of semi-ring airbags 3 is fixedly embedded on the outer wall of the half-body cover 2, and the outer wall of the semi-ring airbag 3 is fixedly connected to the inner wall of the vertical half-tube 1b near the top, and the outer wall of the semi-ring airbag 3 is communicated with the bottom of the arc-shaped air storage chamber 1d opened in the vertical half-tube 1b through the air guide tube 14, and an air-increasing component 4 for driving the semi-ring airbag 3 to elastically expand is installed on the vertical half-tube 1b, and the air-increasing component 4 includes an arc-shaped piston plate 41, and the arc-shaped piston plate 41 is slidably installed in the arc-shaped air storage chamber 1d and slidably connected to the arc-shaped air storage chamber 1d, and a rotatably connected threaded rod 42 is installed on the arc-shaped piston plate 41, and the threaded rod 42 passes through the threaded through hole 1e opened at the top of the arc-shaped air storage chamber 1d and is threadedly connected to the threaded through hole 1e, and the rod head of the threaded rod 42 is fixedly installed with a knob 43;

[0030] An inclined plate disc 21 is fixedly engaged on the top of the half cover 2, and symmetrically distributed insertion holes B21a are opened on the inclined plate disc 21. After the two half boxes 1 are spliced ​​together to form an oilfield wellhead liquid receiving box, a U-shaped fixing rod 5 is inserted into the insertion holes B21a on the two correspondingly spliced ​​inclined plate discs 21.

[0031] It should be noted that: after the two half boxes 1 are butted together, the arc piston plate 41 is screwed downward along the threaded through hole 1e so that the arc piston plate 41 presses the gas in the arc gas storage chamber 1d into the semi-annular airbag 3, so that the semi-annular airbag 3 expands and makes the half covers 2 on the two half boxes 1 close together and abut against each other, and then the U-shaped fixing rod 5 is inserted into the insertion hole B21a on the two correspondingly spliced ​​inclined plate discs 21 to achieve fixed butt joint of the two half boxes 1, and the expanded semi-annular airbag 3 can effectively seal the connection between the half box 1 and the half cover 2. At the same time, when the oil wellhead four-way pipe vibrates, the semi-annular airbag 3 can avoid the connection failure and sealing failure of the half box 1 and the half cover 2.

[0032] The overflow liquid generated when disassembling the wellhead flows out and falls on the inclined plate disc 21 to flow into the liquid accumulation chamber 1a, that is, the overflow generated when disassembling the operating wellhead does not fall to the ground to pollute the well site, thereby achieving environmentally friendly operations.

[0033] The working principle of the oilfield wellhead liquid receiving box provided by the utility model is as follows:

[0034] Two half boxes 1 of the same specifications are closed together and buckled on the lower part of the large flange on the upper part of the wellhead four-way. The two combined horizontal half pipes 1c are mounted on the horizontal pipes on both sides of the oil wellhead four-way and fixed in the up and down direction. The two vertical half pipes 1b are mounted on the risers of the oil wellhead four-way. After completion, the U-shaped fixing rod 5 is inserted into the insertion hole A11a opened on the outer edge 11 after the two half boxes 1 are spliced ​​to form the oil field wellhead liquid receiving box to achieve the fixation of the two half boxes 1. When the two half boxes 1 are docked, they are screwed downward along the threaded through hole 1e so that the arc piston plate 41 presses the gas in the arc gas storage chamber 1d into the semi-annular airbag 3, so that the semi-annular airbag 3 expands and makes the two half boxes 1 fixed. The half covers 2 on the body box 1 are closed and abutted against each other, and then the U-shaped fixing rod 5 is inserted into the insertion hole B21a on the two correspondingly spliced ​​inclined plate discs 21 to achieve fixed docking of the two half boxes 1, and the inflated semi-annular airbag 3 can effectively seal the connection between the half box 1 and the half cover 2. At the same time, when the four-way pipe at the oil wellhead vibrates, the semi-annular airbag 3 set can avoid the connection failure and sealing failure between the half box 1 and the half cover 2, and the overflow liquid generated when disassembling the wellhead flows out and falls on the inclined plate disc 21 to flow into the liquid accumulation chamber 1a, that is, the overflow generated by the disassembly of the operating wellhead does not fall to the ground to pollute the well site, thereby achieving environmentally friendly operations.

[0035] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0036] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An oilfield wellhead liquid receiving box, comprising two half boxes (1) of the same specification, wherein the half boxes (1) are provided with a liquid storage chamber (1a), and the oilfield wellhead liquid receiving box is formed by splicing the two half boxes (1), characterized in that: A vertical half pipe (1b) and a horizontal half pipe (1c) are fixedly embedded on the inner wall of the half box (1), and the vertical half pipe (1b) and the horizontal half pipe (1c) intersect with each other. A half cover (2) is installed on the vertical half pipe (1b); A semi-circular airbag (3) is fixedly embedded in the outer wall of the half cover (2), and the outer wall of the semi-circular airbag (3) is fixedly connected to the inner wall of the vertical half tube (1b) near the top, and the outer wall of the semi-circular airbag (3) is connected to the bottom of the arc-shaped air storage cavity (1d) opened in the vertical half tube (1b) through the air guide tube (14); The vertical half pipe (1b) is provided with an air-increasing component (4) for driving the semi-annular airbag (3) to elastically expand.

2. The oilfield wellhead liquid receiving box according to claim 1, characterized in that: The air-increasing assembly (4) comprises an arc-shaped piston plate (41), the arc-shaped piston plate (41) being slidably mounted in the arc-shaped air storage chamber (1d) and being slidably connected to the arc-shaped air storage chamber (1d), and a rotatably connected threaded rod (42) being mounted on the arc-shaped piston plate (41), the threaded rod (42) passing through a threaded through hole (1e) provided at the top of the arc-shaped air storage chamber (1d) and being threadedly connected to the threaded through hole (1e), and a knob (43) being fixedly mounted on the rod head of the threaded rod (42).

3. The oilfield wellhead liquid receiving box according to claim 1, characterized in that: An outer edge (11) is fixedly mounted on the outer wall of the half box (1), and symmetrically distributed insertion holes A (11a) are provided on the outer edge (11). After two half boxes (1) are spliced ​​together to form an oilfield wellhead liquid receiving box, U-shaped fixing rods (5) are inserted into the insertion holes A (11a) on the two correspondingly spliced ​​outer edges (11).

4. The oilfield wellhead liquid receiving box according to claim 1, characterized in that: An inclined plate disc (21) is fixedly engaged with the top of the half cover (2), and the inclined plate disc (21) is provided with symmetrically distributed insertion holes B (21a). After two half boxes (1) are spliced ​​together to form an oilfield wellhead liquid receiving box, U-shaped fixing rods (5) are inserted into the insertion holes B (21a) on the two correspondingly spliced ​​inclined plate discs (21).

5. The oilfield wellhead liquid receiving box according to claim 1, characterized in that: A sealing strip (13) is fixedly embedded on the spliced ​​inner wall of the half box (1).

6. The oilfield wellhead liquid receiving box according to claim 1, characterized in that: Semicircular threaded pipes (12) communicating with the transverse half pipe (1c) are fixedly embedded on both sides of the half box (1). After the two half boxes (1) are spliced ​​together to form an oilfield wellhead liquid receiving box, threaded collars (6) are sleeved on the two semicircular threaded pipes (12) corresponding to each other.

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