CN221442548U - Wellhead oil-water internal control device - Google Patents

Abstract

The utility model discloses a wellhead oil and water internal control device, including a shell, the shell is a rectangular body; two gate base fixed shafts penetrating the shell are arranged at the bottom of the shell, the two gate base fixed shafts are connected to the gate switch operating lever outside the shell, and are fixedly connected to the gate base inside the shell; the gate base is provided with a gate base oil drain hole; the upper end of the gate base is a connecting seat, and a movable gate is connected to the connecting seat. The utility model is installed on the upper part of the wellhead blowout preventer, occupies a small area, and is designed and processed with double oil drain holes, one is the oil drain channel to flow outward, and the other is the oil drain hole of the gate base to drain oil and water downward, and the oil drain speed is fast.

Description

A wellhead oil and water internal control device

Technical Field

The utility model relates to the technical field of collecting liquid leakage in oil pipes, in particular to a wellhead oil and water internal control device.

Background technique

In the production process of oil and water wells, the pipe column is blocked due to the breakage of the sucker rod, heavy oil, sand jam, wax jam, scaling, too much sand blocking the oil pipe at the sand surface during the operation, and the recoil sand blocking the oil pipe. When the liquid in the pipe column cannot be discharged into the well, during the operation, although the suspended oil and water recovery device and the closed recovery device are used for recovery, part of the oil and water does not enter the recovery device or pierces out from the recovery device under the action of the impact force, causing pollution. When starting a single root, there is a certain sealing at both ends, but in the process of unloading the oil pipe thread, the oil and water pierce out from the thread, causing pollution, and the closed recovery device has a small space, the inner diameter of the oil pipe is large and the liquid volume is large, the liquid outlet channel leaks slowly, and the oil and water are constantly pierced from the upper and lower sealing parts, causing pollution. In order to ensure that the oil and water in the well are effectively controlled, reduce the pollution and safety hazards of the well site, reduce the labor intensity of employees, and improve the time efficiency of the operation, it is very necessary to develop a wellhead oil and water internal control device.

Publication (Announcement) No.: CN205135507U, discloses a liquid collection device for the wellhead of an oil well. The liquid collection device includes: a liquid collecting box; a flow guide part for collecting and guiding the liquid to flow into the liquid collecting box, the flow guide part has a mounting hole that matches the oil pipe, and the flow guide part is connected to the liquid collecting box. When one end of the oil pipe is matched with the mounting hole, the moment the oil pipe is removed, the crude oil and other liquids sprayed from the oil pipe are collected by the flow guide part and guided into the liquid collecting box, so that the above liquid can be collected and temporarily stored inside the liquid collecting box, thereby avoiding the problem of environmental pollution caused by the liquid in the oil pipe directly spraying to the ground during the well repair process.

The prior art occupies a large area, and the inclined installation hole cannot perfectly match the oil pipe, which will cause some oil and water to leak to the ground.

Publication (Announcement) No.: CN215213417U discloses a technical field of oilfield well repairing equipment, and particularly relates to an oil and water well blowout prevention and environmental protection device. Its technical solution is: a blowout prevention telescopic cover is installed on the upper surface of the liquid box base, a central hole and a liquid discharge port are provided at the lower part of the liquid box base, a telescopic rod outer shell is provided on the side wall of the liquid box base, and a telescopic rod that can move up and down is installed in the inner cavity of the telescopic rod outer shell, and the upper end of the telescopic rod is connected to the upper end of the blowout prevention telescopic cover through a connecting piece. This prior art completely receives the liquid at the oil pipe shackle through a conical cylindrical cavity formed after the blowout prevention telescopic cover is unfolded, and discharges it to the oil and water well casing through the liquid discharge port at the bottom of the liquid box base; in addition, during most of the time of the oil pipe lifting operation, the blowout prevention telescopic cover is in a retracted state to avoid affecting the wellhead operation, which not only avoids pollution to the surrounding environment of the construction site, but also avoids the impact on the health of the operating workers, thereby improving the efficiency of the well repair operation.

This prior art occupies a large area.

Publication (Announcement) No.: CN116081139A, discloses a fixed wellhead hazardous waste liquid environmental collection device, including: an outer layer of sprayed polyurea elastomer; a middle layer of polyurethane polymer reinforcement layer, the middle layer of polyurethane polymer reinforcement layer is arranged at the bottom of the outer layer of sprayed polyurea elastomer, the bottom of the middle layer of polyurethane polymer reinforcement layer is a bottom plate structure, the bottom plate structure and the wellhead and the process are sealed and treated with anti-seepage, the bottom plate structure is surrounded by a cofferdam structure, and the front of the folding connection between the cofferdam structure and the bottom plate structure is provided with a flexible folding connection structure. This prior art can completely realize the collection of hazardous waste liquids flowing out of the wellhead oil tree pipe valve due to maintenance and repair, so that there is no hazardous waste liquid contaminating the ground within 3 meters on all sides of the well site oil tree ground, and realize the standardization and normalization of well site environmental protection; save manpower, no need to repeatedly carry out environmental protection protection of the oil tree and the ground during underground well repair and logging operations and oil production plant well site maintenance operations, and no need to spend manpower and transportation tools to lay and transport.

This prior art occupies a large area.

In short, the technical solutions of the above-disclosed technologies, the technical problems to be solved and the beneficial effects produced are all different from the present utility model. Regarding more technical features, technical problems to be solved and the beneficial effects of the present utility model, there is no technical inspiration in the above-disclosed technical documents.

Utility Model Content

In view of the above-mentioned defects in the prior art, the purpose of the utility model is to provide a device for controlling the overflow of oil and water from the inside when wet lifting the oil pipe, thereby overcoming the defects of the existing control methods such as difficulty in pollution control and potential safety hazards, thereby improving the oil and water pollution control effect, improving production efficiency, and reducing the labor intensity of employees.

In order to achieve the above purpose, the utility model adopts the following technical solutions:

A wellhead oil and water internal control device comprises a housing, the housing is a rectangular body; two gate base fixing shafts penetrating the housing are arranged at the bottom of the housing, the two gate base fixing shafts are connected to gate switch operating levers outside the housing, and are fixedly connected to gate bases inside the housing;

The gate base is provided with a gate base oil drain hole.

The upper end of the gate base is a connecting seat, and the connecting seat is connected with a movable gate.

The movable gate plate is provided with a semicircle whose diameter is larger than the oil pipe and smaller than the oil pipe coupling. When the two movable gate plates are assembled together, the formed full circle can receive the oil pipe coupling.

The gate base fixed shaft is connected to the housing through a bearing, and a bearing cover is installed outside the bearing.

The four side panels of the rectangular shell are respectively a first fixed plate, a second fixed plate, a first movable plate, and a second movable plate; the gate base fixing shaft passes through the first fixed plate and the second fixed plate;

The shell is provided with an oil drain channel on the first fixing plate or the second fixing plate; the oil drain channel is externally connected to a drainage pipe.

The first movable plate and the second movable plate are fixed to the side surfaces of the first fixed plate and the second fixed plate by bolts.

The upper end of the shell is connected to the upper flange, and the lower end is connected to the lower flange, and a plurality of bolt holes are arranged on the upper flange and the lower flange;

A neck body is arranged between the shell and the upper flange and the lower flange;

The upper flange is provided with an upper flange steel ring groove, and the lower flange is provided with a lower flange steel ring groove.

The upper flange is threadedly connected to the self-sealing device, and the lower flange is threadedly connected to the wellhead blowout preventer.

Compared with the prior art, the utility model has the following beneficial effects:

1) Installed on the top of the wellhead blowout preventer, occupying a small area;

2) Double oil leakage. The device is designed with double oil leakage holes. One is the oil leakage channel to flow outward, and the other is the oil leakage hole at the gate base to drain oil and water downward, with a fast oil leakage speed;

3) Easy replacement. It is easy to replace the gate. When lifting the oil pipe, select the movable gate according to the outer diameter of the oil pipe. When replacing the gate, remove the movable side plate on the shell, flip the movable gate out of the shell and replace it.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a wellhead oil and water internal control device of the utility model;

Figure 2 is an enlarged view of the movable gate in Figure 1 of the present utility model;

Figure 3 is a schematic diagram of the structure of the utility model after the gate is closed;

In the figure: 1. upper flange steel ring groove; 2. upper bolt hole; 3. movable side plate fixing screw; 4. first movable plate; 42. second movable plate; 5. movable gate; 6. gate fixing screw; 7. gate base; 8. gate base oil drain hole; 9. gate base fixing shaft; 10. movable side plate fixing nut; 11. lower flange bolt hole; 12. lower flange steel ring groove; 13. upper flange; 14. shell; 15. gate switch lever; 16. bearing; 17. bearing cover; 18. bearing cover fixing bolt; 19. oil drain channel; 20. lower flange; 21. device neck; 22. first fixed plate; 23. second fixed plate.

Detailed ways

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Referring to FIGS. 1 to 3 , the utility model provides a wellhead oil-water internal control device, comprising a housing 14, the upper end of the housing 14 is connected to an upper flange 13, and the lower end is connected to a lower flange 20, and a plurality of bolt holes 2 are provided on the upper flange 13 and the lower flange 20;

The housing 14 is a rectangular body, and two gate base fixing shafts 9 penetrating the housing 14 are arranged at the bottom of the housing 14. The gate base fixing shaft 9 is connected to a gate switch operating lever 15 outside the housing 14, and is fixedly connected to a gate base 7 inside the housing 14; the gate base 7 is provided with a gate base oil drain hole 8;

The upper end of the gate base 7 is a connecting seat, and the connecting seat is connected to the movable gate 5 through the gate fixing screws 6;

The movable gate plate 5 is provided with a semicircle whose diameter is larger than the oil pipe and smaller than the oil pipe coupling. When the two movable gate plates are assembled together, the formed full circle can receive the oil pipe coupling.

The gate base fixed shaft 9 is connected to the housing 14 via a bearing 16, an oil bearing cover 17 is installed outside the bearing 16, and the bearing cover 17 is fixed with a fixing bolt 18;

The four side panels of the rectangular body of the housing 14 are respectively a first fixed plate 22, a second fixed plate 23, a first movable plate 4, and a second movable plate 42; the gate base fixing shaft 9 passes through the first fixed plate 22 and the second fixed plate 23;

The housing 14 is provided with an oil drain channel 19 on the first fixing plate 22 or the second fixing plate 23; the oil drain channel 19 is externally connected to a drainage pipe;

The first movable plate 4 and the second movable plate 42 are fixed to the sides of the first fixed plate 22 and the second fixed plate 23 by fixing screws 3 and nuts 10;

A neck body 21 is provided between the housing 14 and the upper flange 13 and the lower flange 20;

The upper flange 13 is provided with an upper flange steel ring groove 1 , and the lower flange 20 is provided with a lower flange steel ring groove 12 .

working principle:

The lower flange is threadedly connected to the wellhead blowout preventer 20, and the upper flange 13 is threadedly connected to the self-sealing device (to prevent oil and water from splashing out from the upper flange 13). The wellhead blowout preventer and the self-sealing device are prior art, and are known to those skilled in the art.

When the oil pipe is wet pulled, the oil pipe coupling of the pipe column is lifted up to enter the inner cavity of the device, the gate switch lever 15 is operated, the movable gate 5 is closed, the oil pipe coupling is lowered to sit on the movable gate 5, the oil pipe coupling is lowered to sit on the movable gate 5, and the oil pipe thread is removed and then slowly lifted up to a certain height (not exceeding the self-sealing device), the liquid in the oil pipe is discharged to the internal control device, the oil and water are discharged outwardly from the oil leakage channel 19 on one side of the internal control device, and the oil and water are drained downward from the oil leakage hole 8 of the gate base 7, thereby completely solving the problem of wellhead pollution when the oil pipe is wet pulled up.

If the tubing in the well only needs to be back-clamped, lift the tubing coupling out of the self-sealing, drive in the elevator, loosen the tubing, and then lower the tubing coupling into the oil-water internal control device, sit on the movable gate plate 5, remove the tubing thread, and lift the tubing to drain the oil and water in the device cavity.

When the diameter specification of the oil pipe in the well changes, the fixing screws 3 on the movable side plate 4 are removed, the first movable plate 4 and the second movable plate 42 are removed, the movable gate plate 5 is turned over to the outside of the device, and the matching movable gate plate 5 is replaced according to the oil pipe specification in the well.

All components and connection methods of components not discussed in this application belong to the known technologies in this technical field and can be directly applied without further explanation.

In the present invention, the term "plurality" means two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims (8)

1. The wellhead oil-water internal control device comprises a shell, wherein the shell is rectangular;

the device is characterized in that two flashboard base fixing shafts penetrating through the shell are arranged at the bottom of the shell, flashboard switch operating levers are connected to the two flashboard base fixing shafts outside the shell, and flashboard bases are fixedly connected to the inside of the shell;

The movable flashboard is characterized in that a flashboard base oil drain hole is formed in the flashboard base, a connecting seat is arranged at the upper end of the flashboard base, and a movable flashboard is connected onto the connecting seat.

2. The wellhead oil-water internal control device according to claim 1, wherein the movable flashboard is provided with a semicircle with a diameter larger than that of the oil pipe and smaller than that of the oil pipe coupling, and when the two movable flashboard are mutually spliced, the formed complete circle can receive the oil pipe coupling.

3. The wellhead oil-water internal control device according to claim 2, wherein the fixed shaft of the flashboard base is connected with the shell through a bearing, and a bearing cover is arranged outside the bearing.

4. The wellhead oil-water internal control device according to claim 3, wherein the four side panels of the rectangular shell are respectively a first fixed plate, a second fixed plate, a first movable plate and a second movable plate; the flashboard base fixing shaft penetrates through the first fixing plate and the second fixing plate.

5. The wellhead oil-water internal control device according to claim 4, wherein the casing is provided with a drain channel on the first or second fixed plate; the oil drainage channel is externally connected with a drainage tube.

6. The wellhead oil-water internal control device according to claim 5, wherein the first movable plate and the second movable plate are fixed on the side surfaces of the first fixed plate and the second fixed plate through bolts.

7. The wellhead oil-water internal control device according to any one of claims 1 to 6, wherein the upper end of the housing is connected to an upper flange, the lower end is connected to a lower flange, and a plurality of bolt holes are formed in the upper flange and the lower flange;

a neck body is arranged between the shell and the upper flange as well as between the shell and the lower flange;

The upper flange is provided with an upper flange steel ring groove, and the lower flange is provided with a lower flange steel ring groove.

8. The wellhead oil-water internal control device according to claim 7, wherein the upper flange is in threaded connection with the self-sealing device, and the lower flange is in threaded connection with the wellhead blowout preventer.