CN112392419A

CN112392419A - Online paraffin removal and collection device for inner wall of oil pipe of oil field operation wellhead

Info

Publication number: CN112392419A
Application number: CN202011320913.3A
Authority: CN
Inventors: 周恒仓; 王哲; 胡胜杰; 白丽君; 丛日东; 郑洪友
Original assignee: Petrochina Co Ltd; Daqing Oilfield Co Ltd
Current assignee: Petrochina Co Ltd; Daqing Oilfield Co Ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-02-23

Abstract

An on-line paraffin removal and collection device for the inner wall of an oil pipe at a wellhead in oil field operation. The main problem of solving current oil field oil pipe inner wall paraffin removal device polluted environment, construction cost height. The method is characterized in that: the suspension bracket is characterized in that a roller (2) is connected to the suspension bracket (1) through a rotating shaft, a coil (3) is wound on the roller (2), a high-pressure pipeline (31) is arranged at the center of the interior of the coil (3), an annular cavity at the periphery of the high-pressure pipeline (31) is a negative-pressure pipeline (32), the end of the coil (3) is connected with an extraction and washing joint (4), a high-pressure flushing hole (45) connected with the high-pressure pipeline (31) is axially formed in the center of the extraction and washing joint (4), and a plurality of negative-pressure suction holes (46) connected with the negative-pressure pipeline (32) are formed in the periphery of the high-pressure flushing. The online paraffin removal and collection device for the inner wall of the oil pipe at the wellhead for oil field operation can clean the inner wall of the oil pipe on line, does not pollute a well site and the surrounding environment, and reduces the construction cost.

Description

Online paraffin removal and collection device for inner wall of oil pipe of oil field operation wellhead

Technical Field

The invention relates to the field of oil fields, in particular to an on-line paraffin removal and collection device for the inner wall of an oil pipe at a wellhead for oil field operation.

Background

At present, oil pipe wax removal in oil field operation adopts ground wax removal, an oil pipe lifted out of a well is arranged on a pipe bridge on the ground of a well site, a boiler vehicle is used for removing wax on the ground, dirty oil sewage and oil wax generated in wax removal fall into an anti-seepage cloth below the pipe bridge, and the anti-seepage cloth can flow out when the anti-seepage cloth is damaged or the dirty oil sewage generated in wax removal is excessive, so that the well site and the surrounding environment of the well site are polluted. Meanwhile, each well is made of impermeable cloth, so that the construction cost is high. The existing on-line (well head) paraffin removal of sucker rods and oil pipes can only clean the outer walls of the sucker rods and the oil pipes, but can not clean the inner walls.

Disclosure of Invention

In order to overcome the defects that the existing paraffin removal device for the inner wall of the oil pipe of the oil field pollutes the environment and is high in construction cost, the invention provides the online paraffin removal and collection device for the inner wall of the oil pipe of the oil field operation well head, which can clean the inner wall of the oil pipe on line, does not pollute the well site and the surrounding environment and reduces the construction cost.

The technical scheme of the invention is as follows: the utility model provides an online paraffin removal of oil field operation well head oil pipe inner wall and collection device, includes the mounted frame, be connected with the cylinder through the pivot on the mounted frame, the winding has the coil pipe on the cylinder, coil pipe inside center department is equipped with high-pressure line, and the peripheral annular cavity of high-pressure line is negative pressure pipeline, coil pipe end connection is taken out and is washed the joint, it has the high-pressure flushing hole that links to each other with high-pressure line to take out and wash joint center axial division, and high-pressure flushing hole periphery is opened has the negative pressure suction hole that a plurality of links to each other with negative pressure pipeline, and takes out and wash and open on the joint lateral wall and have a plurality of and

the bottom of the high-pressure flushing hole is closed.

The cleaning openings are arranged in two rows, and the two rows of cleaning openings are staggered.

And a support frame is arranged between the outside of the high-pressure pipeline and the inner wall of the coil pipe.

The invention has the following beneficial effects: by adopting the scheme, overflow water in the inner cavity of the oil pipe can be sucked through the negative pressure suction hole and the negative pressure pipeline when the oil pipe is lifted and descended, so that overflow generated by the inner cavity of the oil pipe does not pollute a well site and the surrounding environment; meanwhile, when the oil pipe is lifted, the oil wax in the inner cavity of the oil pipe can be cleaned through the high-pressure pipeline and the high-pressure flushing hole, and the oil pipe is sucked through the negative-pressure pipeline, so that the wax removal of the oil pipe at a wellhead is realized, the wax removal on the ground of the oil pipe to pollute a well site and the surrounding environment is eliminated, the construction cost is reduced, and the pollution of the well site and the surrounding environment by the oil wax and sewage generated by lifting and lowering the oil pipe is avoided.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a perspective view of the suction irrigation head;

FIG. 3 is a cross-sectional view of the suction irrigation head;

figure 4 is a schematic view of a coiled tubing.

In the figure, 1-a suspension bracket, 2-a roller, 3-a coil pipe, 4-a suction and washing joint, 5-a lifting hook, 41-an internal connection joint, 42-a sealing ring, 43-a suction and washing head, 44-a cleaning port, 45-a high-pressure washing hole and 46-a negative-pressure suction hole.

Detailed Description

The invention will be further described with reference to the accompanying drawings in which:

referring to fig. 1 to 4, the device for online paraffin removal and collection of the inner wall of an oil pipe of an oil field well comprises a suspension bracket 1, wherein the suspension bracket 1 can be suspended on a lifting hook 5 of a crane during operation. The suspension bracket 1 is connected with two rotating shafts, the outside of each rotating shaft is provided with a roller 2, each roller 2 is respectively wound with a coil pipe 3, the center of the inside of each coil pipe 3 is provided with a high-pressure pipeline 31, a support frame is arranged between the outside of each high-pressure pipeline 31 and the inner wall of each coil pipe 3, an annular cavity is formed between the outside of each high-pressure pipeline 31 and the inner wall of each coil pipe 3, the annular cavity is a negative-pressure pipeline 32, the high-pressure pipelines 31 are connected with a high-pressure pump, and the negative-pressure. The lower end of the coil pipe 3 is connected with a pumping and washing joint 4, the pumping and washing joint 4 comprises an inner connecting joint 41 and a pumping and washing head 43 which are in threaded connection, wherein a high-pressure washing hole 45 is axially formed in the center of the inner connecting joint 41, the bottom of the high-pressure washing hole 45 is closed, a plurality of negative pressure suction holes 46 are formed in the periphery of the high-pressure washing hole 45, after the inner connecting joint 41 is connected with the coil pipe 3, the high-pressure washing hole 45 is communicated with a high-pressure pipeline 31, and the negative pressure suction holes 46 are communicated with a pressure pipeline 32. The side wall of the pumping and washing connector 4 is provided with a plurality of cleaning ports 44 communicated with the high-pressure flushing hole 45, and the cleaning ports 44 are not communicated with the negative-pressure suction hole 46. The cleaning openings 44 penetrate through the inner connecting joint 41 and the side wall of the suction flushing head 43, the cleaning openings 44 are arranged in two rows, the two rows of cleaning openings 44 are separated by the sealing ring 42, the two rows of cleaning openings 44 are staggered in the radial direction, and the inclination angles of the two rows of cleaning openings 44 are opposite, namely, one row is inclined upwards and the other row is inclined downwards.

When the oil-water pumping joint works, when oil-water in the inner cavity of the oil pipe is pumped, the oil-water pumping joint is connected with the coil pipe 3 through a self-sucking tank arranged on the ground of a well repairing well site, and the oil-water in the inner cavity of the oil pipe is sucked away through a cleaning port 44 on the pumping joint 4. When the inner cavity of the oil pipe is cleaned, high-pressure and high-heat equipment such as a boiler car and the like arranged on the ground of a well repairing well site and a self-priming tank are connected with the coil pipe 3, and high-pressure water sequentially passes through the high-pressure pipeline 31 and the high-pressure flushing hole 45 on the pumping joint 4 and then is sprayed out from the cleaning hole 44 to clean the inner wall of the oil pipe; when the negative pressure pump is started, the cleaned sewage flows back to the self-priming tank through the negative pressure flushing hole 46 and the negative pressure pipeline 32.

Claims

1. The utility model provides an online paraffin removal of oil field operation well head oil pipe inner wall and collection device, includes mounted frame (1), its characterized in that: be connected with cylinder (2) through the pivot on mounted frame (1), the winding has coil pipe (3) on cylinder (2), coil pipe (3) inside center department is equipped with high-pressure line (31), and the peripheral annular cavity of high-pressure line (31) is negative pressure pipeline (32), coil pipe (3) end connection is taken out and is washed joint (4), take out and wash joint (4) central axial and open and have high pressure flushing hole (45) that link to each other with high-pressure line (31), high pressure flushing hole (45) periphery is opened negative pressure suction hole (46) that a plurality of and negative pressure pipeline (32) link to each other, and is opened on taking out and is washed joint (4) lateral wall and has a plurality of and the communicating washing mouth (44) of high pressure flushing hole (45).

2. The on-line paraffin removal and collection device for the inner wall of the oil pipe of the oil field operation wellhead according to claim 1, which is characterized in that: the bottom of the high-pressure flushing hole (45) is closed.

3. The on-line paraffin removal and collection device for the inner wall of the oil pipe of the oil field operation wellhead according to claim 2, characterized in that: the cleaning openings (44) are arranged in two rows, and the two rows of cleaning openings (44) are staggered with each other.

4. The on-line paraffin removal and collection device for the inner wall of the oil pipe of the oil field operation wellhead according to claim 3, characterized in that: and a support frame is arranged between the outside of the high-pressure pipeline (31) and the inner wall of the coil pipe (3).