CN210685923U - Anti-blowout pipe reinjection system - Google Patents

Abstract

The utility model discloses a lubricator reinjection system, include: a high pressure plunger pump having a water inlet and a water outlet; the liquid level controller comprises a water tank, a floating ball liquid level switch arranged on a cover plate of the water tank and an electric valve connected with the floating ball liquid level switch; the water tank is connected with the water inlet through a connecting pipe, and the electric valve is connected with the water outlet through a pipeline. The utility model provides a lubricator reinjection system can not only realize the cyclic utilization of liquid, also can guarantee simultaneously that the operating environment at scene avoids polluting.

Description

Anti-blowout pipe reinjection system

Technical Field

The utility model belongs to the technical field of the oil field environmental protection, concretely relates to lubricator reinjection system.

Background

A christmas tree is a wellhead device used for producing oil, such as a self-blowing well and a mechanical production well. It is the main equipment for controlling and regulating oil and gas production in the uppermost part of oil and gas well. While the lubricator is an essential core component of the Christmas tree. The blowout prevention pipe can be applied to wellhead equipment of a flowing well and can also be used for wellhead equipment of a water injection well.

At present, in the process of carrying out cable test water injection by using a lubricator, because a gap exists between the outside of an armored cable and an inner hole of a blowout preventer, an oil-water mixture can be inevitably overflowed from the upper part or the side part of the blowout preventer, the field environment is seriously polluted, and the new requirements of the national environmental protection law on the field operation environment of a wellhead Christmas tree can not be met.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned problem that exists among the prior art, the utility model provides a lubricator reinjection system. The to-be-solved technical problem of the utility model is realized through following technical scheme:

a lubricator refill system comprising:

a high pressure plunger pump having a water inlet and a water outlet;

the liquid level controller comprises a water tank, a floating ball liquid level switch arranged on a cover plate of the water tank and an electric valve connected with the floating ball liquid level switch;

the water tank is connected with the water inlet through a connecting pipe, and the electric valve is connected with the water outlet through a pipeline.

In an embodiment of the present invention, a filter is disposed between the water tank and the water inlet.

In an embodiment of the present invention, the float level switch is fixed on the cover plate of the water tank by screws.

The utility model discloses an in one embodiment, still include the engine, connect high-pressure plunger pump for to high-pressure plunger pump provides power.

In an embodiment of the present invention, the device further comprises a high pressure pipeline connecting the high pressure plunger pump and the lubricator.

The utility model has the advantages that:

1. the utility model provides a blowout prevention pipe reinjection system utilizes the engine to drive the high-pressure pump and reinjects the oil-water mixture that the blowout prevention head overflows into the water injection pipeline, can not only realize cyclic utilization, more guarantees that the operating environment on the spot is not polluted;

2. the utility model provides a lubricator reinjection system which is provided with an engine, does not need external power supply and is suitable for field work;

3. the utility model provides a lubricator reinjection system adopts the automatic control principle, realizes continuous automatic work through the floater liquid level switch that sets up in the water tank inside to floater liquid level switch is provided with minimum protection liquid level, and when the liquid level of water tank inside reachd minimum liquid level, liquid level switch can give the electric ball valve signal after detecting, makes the electric ball valve open, guarantees that the plunger pump is no longer toward going out the drainage, avoids the plunger pump phenomenon of taking out futilely to appear, and degree of automation is high, safe and reliable.

4. The utility model provides a lubricator reinjection system is suitable for well head pressure range and is wider, can realize the conversion of different pressure grades.

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Drawings

FIG. 1 is a schematic structural view of a lubricator reinjection system according to an embodiment of the present invention;

fig. 2 is a schematic connection diagram of a lubricator refill system according to an embodiment of the present invention.

The reference numbers illustrate:

1-high pressure plunger pump; 2-a liquid level controller; 3-a filter; 4-an engine; 5-high pressure lines; 6-an emptying valve; 7-a hose; 8-an overflow pipe; 11-water inlet of high pressure plunger pump; 12-water outlet of high-pressure plunger pump; 21-a water tank; 22-floating ball liquid level switch; 23-electrically operated valve.

Detailed Description

The present invention will be described in further detail with reference to specific examples, but the present invention is not limited thereto.

Example one

Referring to fig. 1, fig. 1 is a schematic structural diagram of a lubricator reinjection system according to an embodiment of the present invention, including:

a high pressure plunger pump 1 having a water inlet 11 and a water outlet 12;

the liquid level controller 2 comprises a water tank 21, a float liquid level switch 22 arranged on a cover plate of the water tank 21 and an electric valve 23 connected with the float liquid level switch 22;

the water tank 21 is connected to the water inlet 11 through a connecting pipe, and the electric valve 23 is connected to the water outlet 12 through a pipe. Preferably, a rubber hose may be used to connect the water tank 21 and the water inlet 11.

In this embodiment, the high pressure plunger pump is an important device of the lubricator refill system. The plunger piston reciprocates in the cylinder body, so that the volume of the sealed working cavity is changed to suck and press liquid, and the plunger piston has the advantages of high rated pressure, compact structure, high efficiency, convenience in flow regulation and the like.

In this embodiment, the lubricator refill system further comprises an engine 4 connected to the high-pressure plunger pump 1 for powering the high-pressure plunger pump 1. The engine 4 is connected with the mounting hole of the high-pressure plunger pump 1 through its own output shaft and drives the high-pressure plunger pump 1. The engine is fixed on the vehicle body, and a shock pad is arranged between the vehicle body and the internal engine.

The utility model provides a lubricator reinjection system provides the required power of system from taking the engine, need not the outside power supply, is fit for the inconvenient field occasion of power supply.

In the embodiment, the engine provides motive power, the high-pressure plunger pump runs at high speed under the power of the engine to provide required flow and pressure for the system, and the liquid level controller controls water filling or internal circulation of the system by detecting the liquid level height.

In this embodiment, the float level switch 22 is a dry spring type float level switch, and is fixed on the cover plate of the water tank 21 by screws. The floating ball liquid level switch is adopted in the embodiment mainly because of simple structure, convenient use, safety and reliability. It is faster than the ordinary mechanical switch, the working life is long; compared with an electronic switch, the electronic switch has the characteristic of strong load impact resistance, and one product can realize multi-point control; the float switch does not contain components which cause failure, such as a corrugated pipe, a spring, a seal and the like, but adopts a straight floater to drive a magnet inside the switch, and a simple lever of the float switch enables the switch to act instantly. The detection control part of the float level switch 22 and the magnetic float are positioned in the water tank, and the magnetic float rises or falls along with the liquid level, so that a reed switch chip at a position in a detection pipe of the float level switch acts to send a switch conversion signal.

In this embodiment, the lubricator refill system further comprises a high pressure line 5 for connecting the high pressure plunger pump 1 and the lubricator.

Referring to fig. 2, fig. 2 is a schematic connection diagram of a lubricator reinjection system according to an embodiment of the present invention, a water outlet 12 of a high-pressure plunger pump 1 is connected to a blow-down valve 6 of the lubricator through a high-pressure pipeline 5, and a water inlet of a water tank 1 is connected to an overflow pipe 8 installed on the lubricator through a hose 7. In the present embodiment, the hose 7 may be a rubber hose.

In this embodiment, the overflow liquid in the lubricator, after overflowing through the overflow pipe 8, flows through the hose 7 into the tank 21 of the refill system. The detection control part of the float level switch 22 is provided with a high liquid level point and a low liquid level point, and the detection control part inside the water tank 21 detects the position of a float and provides a control signal to the electric valve 23, so that the water outlet of the high-pressure plunger pump 1 is controlled. When detecting that the floating ball in the water tank 21 is at a low position, the electric valve 23 is in an open state, the water discharged from the high-pressure plunger pump 1 reversely flows back to the water tank 21 through the electric valve 23, and at the moment, the water tank 21 is in a self-circulation state; when detecting that a floating ball in the water tank 21 is at a high position, the floating ball liquid level switch 22 triggers the electric valve 23 to close, and water discharged from the high-pressure plunger pump 1 is injected into the blowout prevention pipe through the high-pressure pipeline 5 and the emptying valve 6 and is circularly injected into the well, so that the high-pressure water injection process is realized; along with the decline of water tank 21 liquid level, when the floater is in the low level, touch motorised valve 21 and open, water tank 21 is in self-loopa state again, so go round and begin again, alright realize unmanned on duty, the function of automatic circulation water injection, simultaneously, guaranteed that the operating environment on scene is not polluted.

In this embodiment, a filter 3 is disposed between the water tank 21 and the water inlet 11, so as to effectively filter out impurities. The filter is detachable and convenient to clean regularly.

The utility model provides a lubricator reinjection system, its floater liquid level switch's detection control part's liquid level can set up by oneself according to actual conditions to the regulated pressure grade makes this system can adapt to the well head of different pressure ranges.

The utility model discloses a further embodiment, floater liquid level switch still is provided with minimum protection liquid level, and when the liquid level of water tank inside reachd minimum liquid level, floater liquid level switch can give the motorised valve signal after detecting, makes the motorised valve open, guarantees that the plunger pump is no longer toward the drainage, avoids high-pressure plunger pump to appear the phenomenon of doing the pumping, and degree of automation is high, safe and reliable.

The utility model provides a blowout prevention pipe reinjection system utilizes engine drive high pressure plunger pump to reinject the water injection pipeline with the water oil mixture that the blowout prevention head overflow comes in, can not only realize the cyclic utilization of liquid, also can guarantee simultaneously that the operating environment at scene avoids polluting.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (5)

1. A lubricator refill system comprising:

a high-pressure plunger pump (1) having a water inlet (11) and a water outlet (12);

the liquid level controller (2) comprises a water tank (21), a floating ball liquid level switch (22) arranged on a cover plate of the water tank (21) and an electric valve (23) connected with the floating ball liquid level switch (22);

the water tank (21) is connected with the water inlet (11) through a connecting pipe, and the electric valve (23) is connected with the water outlet (12) through a pipeline.

2. Lubricator refill system according to claim 1, wherein a filter (3) is arranged between the water tank (21) and the water inlet (11).

3. The lubricator refill system according to claim 1, wherein the float level switch (22) is screwed to the cover plate of the tank (21).

4. The lubricator refill system according to claim 1, further comprising an engine (4) connected to the high pressure plunger pump (1) for powering the high pressure plunger pump (1).

5. The lubricator refill system according to claim 1, further comprising a high pressure line (5) connecting the high pressure plunger pump (1) and the lubricator.

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