CN212583661U - Wellhead pollution prevention device for oil pipe string without leakage - Google Patents

Abstract

A well head anti-pollution device for oil pipe column without leakage is prepared as setting well head on casing, connecting lower part of oil pipe coupling to oil pipe on pump, setting oil pipe on casing, setting oil pipe coupling on well head, setting air inlet on side surface of air injection joint, setting diameter reducing pipe on lower part of discharge joint, setting discharge port on side surface of discharge joint, setting central hole in discharge joint, drilling central hole from lower end surface of diameter reducing pipe, connecting inner end of discharge port to upper part of central hole, inserting diameter reducing pipe in air injection joint, connecting discharge joint to upper part of air injection joint, inserting insert pipe in liquid level of oil pipe on pump, the lower part of the reducing pipe is connected with the upper part of the insert pipe, and the lower part of the gas injection joint is connected with the upper part of the tubing coupling.

Description

Wellhead pollution prevention device for oil pipe string without leakage

Technical Field

The utility model belongs to the instrument that the oil field oil recovery well operation field was used is the instrument that prevents the well fluid jet to well head ground when carrying oil pipe, is the well head anti-pollution device that plays not let out oil pipe column and use.

Background

When the oil pumping pipe column is lifted in the oil field operation, because the check valve is arranged on the oil well pump on the oil pumping pipe column, in order to avoid that the liquid of an oil pipe above the oil well pump is lifted to hurt operation workers on the ground and cause environmental pollution, an oil drain device is generally installed on the oil well pump, an oil drain hole is opened under the action of the oil drain device during the operation, the oil pipe on the pump is communicated with a sleeve, and the oil and water in the oil pipe on the pump are discharged into the sleeve. The bleeder variety in the oil pumping tubular column is many, and the condition that the work is malfunctioning and can't let out oil has all appeared in various bleeder in the pit, when the bleeder is malfunctioning not let out oil and carry the oil pipe post, the profit in the oil-well pump oil pipe will spray ground, both harms the operation workman, causes environmental pollution again. Technical personnel have studied the oil pipe spray lifter according to the above-mentioned condition, when the bleeder is malfunctioning in the pit, use this kind of oil pipe spray lifter to drain the interior profit of oil pipe from the well head and return to the well, avoid the profit to spray to ground, but present oil pipe spray lifter structure is complicated, bulky, all by manual operation, it is very inconvenient to use, and the reliability is poor, leak easily, can't reach the purpose of preventing environmental pollution, like chinese patent 2006200877777 oil pipe spray lifter, the design purpose is to drain the interior profit of oil pipe from the well head and return to the well, avoid the profit to spray to ground, cause environmental pollution and injury to the operation workman, but can't seal between its left sealing body 1 and the right sealing body 7, make it can't solve the above-mentioned problem that exists completely, still have the problem of environmental pollution.

Disclosure of Invention

The utility model aims at designing a well head anti-pollution device that plays not let out oil pipe column usefulness, when the bleeder is malfunctioning in the pit, use this kind of device can replace the profit in the oil pipe on the pump out, make the interior oilwater of oil pipe of proposing, avoid the profit to spray ground and cause environmental pollution and to operation workman's injury.

The purpose of the utility model is realized like this: the oil pipe pumping device comprises an oil pipe coupling, an oil pipe elevator, a wellhead device, an oil pipe on a pump and a sleeve, wherein the wellhead device is arranged on the upper part of the sleeve, the lower part of the oil pipe coupling is connected with an oil pipe on the pump, the oil pipe on the pump is positioned in the sleeve, the outer diameter of the oil pipe coupling is larger than that of the oil pipe elevator, the aperture of the oil pipe elevator is larger than that of the oil pipe on the pump, the oil pipe on the pump penetrates through the wellhead device and is clamped by the oil pipe elevator, the oil pipe elevator is seated on the wellhead device, the oil pipe coupling is seated on the oil pipe elevator, an oil pump is arranged on the lower part of the oil pipe on the pump, the oil pump further comprises a discharge joint, a gas injection joint and an insertion pipe, the side surface of the gas injection joint is provided with a gas receiving port, the lower section of the discharge joint is a reducing pipe, the side surface of the discharge joint is provided with a discharge, the reducing pipe is inserted into the gas injection joint, the discharge joint is connected with the upper part of the gas injection joint, the connecting point is positioned above the gas connecting port, the insert pipe is inserted into the liquid level of an oil pipe on the pump, the lower part of the reducing pipe is connected with the upper part of the insert pipe, and the lower part of the gas injection joint is connected with the upper part of an oil pipe coupling.

When the oil pipe on the pump needs to be lifted out during the operation and well workover, the oil pipe coupling and the upper part of the oil pipe on the pump are lifted to a wellhead device, an oil pipe elevator buckles the oil pipe on the pump, the oil pipe on the pump is lowered, the oil pipe coupling is seated on the oil pipe elevator, the insert pipe is lowered into the oil pipe on the pump, the head of the insert pipe is clamped by a chuck and seated on the oil pipe coupling, the head of the insert pipe is positioned on the oil pipe coupling, a discharge joint and an air injection joint are connected into a whole and lifted to the upper part of a well mouth, the lower part of the reducing pipe is connected with the head of the insert pipe, the chuck clamping the head of the insert pipe is taken away, the air injection joint is lowered, the lower part of the air injection joint is connected with the oil pipe coupling, then a compressed air source is connected to the air inlet, a liquid discharge pipe is connected to the discharge port, the compressed air source is driven into the upper part, the well fluid in the oil pipe on the pump is discharged from the insert pipe upwards through said discharge opening, so that the well fluid from the tubing collar to the lower section of the insert pipe is replaced as empty pipe.

The utility model has the advantages that: follow connect the gas mouth squeeze into the compressed gas, atmospheric pressure is pressing the liquid level in the oil pipe on the pump and is walking downwards, makes the intraductal well liquid of oil pipe on the pump upwards through from the insert the discharge port discharge, make the oil pipe coupling to the well liquid of the lower part section of insert tube replaced and become empty pipe, when lifting this section oil pipe on the pump again, can not take place well liquid and spray the problem that ground caused environmental pollution and to operation workman's injury, consequently, the utility model discloses can reach the design purpose, make the well site greasy dirt free, make things convenient for the operation work operation, the interior cover of access casing of discharged fluid makes the intraductal stable liquid level that remains throughout of cover, and the interior crude oil of oil pipe on the pump can not fall to the ground extravagant, in addition the top can prevent that the liquid level in the cover from dropping and take place the blowout, has apparent economic benefits.

Drawings

Fig. 1 is an assembly view of the present invention.

Detailed Description

An embodiment of the present invention will be described below with reference to fig. 1.

As shown in figure 1, the utility model comprises a discharge joint 1, a gas injection joint 3, an oil pipe coupling 4, an oil pipe elevator 5, a well head device 6, an insert pipe 7, an oil pipe 8 on pump and a sleeve 9, wherein the well head device 6 is arranged on the upper part of the sleeve 9, the lower part of the oil pipe coupling 4 is connected with the oil pipe 8 on pump, the oil pipe 8 on pump is arranged in the sleeve 9, the outer diameter of the oil pipe coupling 4 is larger than the aperture of the oil pipe elevator 5, the aperture of the oil pipe elevator 5 is larger than the outer diameter of the oil pipe 8 on pump, the oil pipe 8 on pump passes through the well head device 6 and is clamped by the oil pipe elevator 5, the oil pipe elevator 5 is arranged on the well head device 6, the oil pipe coupling 4 is arranged on the oil pipe elevator 5, the side surface of the gas injection joint 3 is provided with a gas receiving port 2, the lower section of the discharge joint 1 is a reducing pipe 12, the side surface of the discharge joint 1 is provided with a discharge port 10, the, the inner end of the discharge port 10 is communicated with the upper part of the central hole 11, the reducing pipe 12 is inserted into the gas injection joint 3, the discharge joint 1 is connected with the upper part of the gas injection joint 3, the connection point is positioned above the gas receiving port 2, the insertion pipe 7 is inserted into the liquid level of the oil pipe 8 on the pump, the lower part of the reducing pipe 12 is connected with the upper part of the insertion pipe 7, and the lower part of the gas injection joint 3 is connected with the upper part of the oil pipe coupling 4.

The oil-well pump has been installed to the lower part of oil pipe 8 on the pump, does not have the bleeder between oil-well pump and the oil pipe 8 on the pump, or the bleeder failure of installation can not open the draining, and the lower part of oil-well pump has inlet valve (check valve), and the well fluid in the oil pipe 8 on the pump can not flow into in the well.

When oil pipe 8 on the pump need be played out in the operation workover, the utility model discloses just at the installation and the use of well head, its installation and use are: firstly, lifting the upper parts of an oil pipe coupling 4 and an oil pipe 8 on a pump to a wellhead device 6, buckling the oil pipe 8 on the pump by an oil pipe elevator 5, lowering the oil pipe 8 on the pump to seat the oil pipe coupling 4 on the oil pipe elevator 5, then lowering an insertion pipe 7 into the oil pipe 8 on the pump, clamping the head of the insertion pipe 7 on the oil pipe coupling 4 by a chuck, positioning the head of the insertion pipe 7 on the oil pipe coupling 4, connecting a discharge joint 1 and an air injection joint 3 into a whole, lifting the discharge joint and the air injection joint to the upper part of a wellhead, connecting the lower part of a reducing pipe 12 with the head of the insertion pipe 7, taking away the chuck clamping the head of the insertion pipe 7, lowering the air injection joint 3 to connect the lower part of the air injection joint 3 with the oil pipe coupling 4, connecting a compressed air source at the air receiving port 2, connecting a liquid discharge pipe at the discharge port 10, pumping the upper part of the oil pipe 8 on the pump by the compressed air source into the liquid level in, the liquid level is moved downwards, so that the well fluid in the oil pumping pipe 8 is discharged from the insert pipe 7 upwards through the discharge port 10, the well fluid from the tubing coupling 4 to the lower section of the insert pipe 7 is replaced to be an empty pipe, and the well fluid is not sprayed around the wellhead when the oil pumping pipe 8 is lifted.

The tail end of the liquid discharge pipe connected with the discharge port 10 is connected to a casing pipe of an oil well, well liquid discharged from the oil pipe 8 on the pump can flow into the well, so that the well liquid in the well is supplemented, the liquid level is stable, and well blowout can be prevented.

The utility model discloses the method of oil recovery well gas lift has been borrowed to the well liquid method in evacuation pump oil pipe 8. The lower portion of the gas injection fitting 3 may be used to raise an elevator. The part of beating the lift elevator also can be designed on discharge joint 1, also belongs to the protection scope of the utility model if the part design of beating the lift elevator on discharge joint 1. The discharge fitting 1 can be designed as a unit (1 piece for the upper part and 1 piece for the reducing pipe 12, both pieces being connected in one piece). The gas injection joint 3 can be designed as an assembly.

The process of lifting the upper parts of the tubing coupling 4 and the tubing-on-pump 8 to the wellhead device 6 is to lift the upper parts of the tubing coupling 4 and the tubing-on-pump 8 to the wellhead device 6 by disconnecting the Christmas tree, connecting the lower lifting nipple with the tubing coupling 4, driving an elevator on the lifting nipple, and lifting the operating machine connected with the elevator.

Claims (1)

1. The utility model provides a play well head anti-pollution device that not let out oil pipe string used, including tubing coupling (4), tubing elevator (5), well head device (6), tubing (8) on the pump, sleeve pipe (9), the upper portion at sleeve pipe (9) is installed in well head device (6), the lower part and the pump of tubing coupling (4) are connected oil pipe (8), pump oil pipe (8) are in sleeve pipe (9), the external diameter of tubing coupling (4) is greater than the aperture of tubing elevator (5), the aperture of tubing elevator (5) is greater than the external diameter of pump oil pipe (8), pump oil pipe (8) pass well head device (6) and are blocked by tubing elevator (5), tubing elevator (5) are sat on well head device (6), tubing coupling (4) are sat on tubing elevator (5), the lower part installation oil-well pump of pump on pump oil pipe (8), characterized by: also comprises a discharge joint (1), a gas injection joint (3) and an insert pipe (7), wherein the side surface of the gas injection joint (3) is provided with a gas receiving port (2), the lower section of the discharge joint (1) is provided with a reducing pipe (12), the side surface of the discharge joint (1) is provided with a discharge port (10), the interior of the discharge joint is provided with a central hole (11), the central hole (11) is drilled upwards from the lower end surface of the reducing pipe (12), the inner end of the discharge port (10) is communicated with the upper part of the central hole (11), the reducing pipe (12) is inserted into the gas injection joint (3), the discharge joint (1) is connected with the upper part of the gas injection joint (3), the connection point is positioned above the gas connecting port (2), the insert pipe (7) is inserted into the liquid level of the oil pipe (8) on the pump, the lower part of the reducing pipe (12) is connected with the upper part of the insert pipe (7), and the lower part of the gas injection joint (3) is connected with the upper part of the tubing coupling (4).

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