CN113653457A

CN113653457A - Double-pipe thermal recovery wellhead device

Info

Publication number: CN113653457A
Application number: CN202110970982.7A
Authority: CN
Inventors: 余亚丽
Original assignee: Individual
Current assignee: Jiangsu Hengda Machinery Manufacturing Co ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2021-11-16
Anticipated expiration: 2041-08-23
Also published as: CN113653457B

Abstract

The invention provides a double-pipe thermal recovery wellhead device, and relates to the technical field of oil recovery. The double-pipe thermal recovery wellhead device comprises an oil production pipe, an annular detection cabin is sleeved on the outer wall of a base, a sampling pipe penetrates through the communicating pipe, the top end of the sampling pipe penetrates through an outer wrapping pipe to enter the detection cabin, and a filter plate capable of rotating up and down is arranged in a movable cavity through a hinged seat. The invention is convenient for scraping off the dirt accumulated on the side wall of the oil production pipe.

Description

Double-pipe thermal recovery wellhead device

Technical Field

The invention relates to the technical field of oil extraction, in particular to a double-pipe thermal recovery wellhead device.

Background

A thermal recovery wellhead device is a tree-shaped oil recovery device which is formed by connecting a main pipeline and branch pipelines with flanges at two sides of the main pipeline, so that the thermal recovery wellhead device is also called as an oil recovery tree, the bottom of the main body pipe is provided with a base used for installing the Christmas tree on a wellhead of an oil field, the base is provided with a communicating pipe communicated with the main body pipe, the oil pumping device is used for being connected with an oil pipe which goes deep into the well bottom, and an air pipe is additionally arranged at the bottom end of the oil pipe, when the oil pumping suction force of a main pipeline cannot meet the requirement of pumping oil in the well upwards, the air supply equipment on the ground sends the gas vent pipe into the oil pipe, so that the petroleum in the oil well can be more smoothly injected into the Christmas tree along the oil pipe under the action of air pressure, when the petroleum at the bottom of the well is conveyed into the oil pipe by the air pipe, because the air pressure is large, impurities at the bottom of the well are inevitably conveyed into the Christmas tree along the oil pipe, so that the side wall of the oil pipe is always polluted.

Disclosure of Invention

The invention aims to provide a double-pipe thermal recovery wellhead device which can timely scrape dirt on the inner wall of a production pipe.

The technical scheme of the invention is that the double-pipe thermal recovery wellhead device comprises an oil production pipe and a base, wherein the base is connected to the bottom of the oil production pipe through a flange, a movable cavity communicated with a pipe cavity of the oil production pipe is arranged in the base, an annular detection cabin is sleeved on the outer wall of the base, an outer packing pipe penetrates between the detection cabin and the movable cavity, a communicating pipe penetrates through the side wall of the movable cavity, a concave cavity formed in the side wall of the movable cavity is formed in the bottom end of the communicating pipe, the top end of the communicating pipe is connected with the bottom end of the outer packing pipe, a sampling pipe penetrates through the communicating pipe, the top end of the sampling pipe penetrates through the outer packing pipe and enters the detection cabin, a liquid collecting cover positioned in the concave cavity is arranged at the bottom end of the outer packing pipe, a first electric cylinder and a controller used for controlling the power-on action of the first electric cylinder are arranged on the outer wall of the base, the detection cabin with still through connection has the back flow between the activity chamber, be equipped with articulated seat on the internal face in activity chamber, through articulated seat is in the activity intracavity is equipped with the filter that can rotate from top to bottom, and the inlet of back flow runs through at the activity intracavity, just the back flow is located the below of filter, the bottom of filter is connected with the steel wire, the other end of steel wire outwards runs through the back flow is connected on the output shaft of first electric jar.

Preferably, the sampling tube is a flexible rubber tube, the bottom end of the sampling tube is inclined, the liquid collection cover is bent by the blocking of the cavity after entering the cavity, the liquid collection cover with the downward opening is deflected to the lower side due to the blocking of the cavity, and when the liquid collection cover moves out of the cavity, the liquid collection cover is pushed into the movable cavity by the sampling tube.

Preferably, the liquid collecting cover can be taken into the concave cavity when the top end of the sampling tube is pulled upwards, the top end of the sampling tube is higher than the detection cabin, and the top end of the sampling tube is provided with a retaining ring.

Preferably, a tension spring is arranged in the pipe cavity of the oil production pipe, and the bottom end of the tension spring is connected to the top surface of the filter plate.

Preferably, the outer wall surface of the tension spring is contacted with the inner wall of the pipe cavity of the oil production pipe.

Preferably, a plush plate is arranged on the bottom surface of the inner cavity of the detection cabin.

Preferably, two second electric cylinders are symmetrically arranged on the outer wall surface of the base, a seat is arranged at the bottom end of the base, stepped holes corresponding to the bottoms of the two second electric cylinders are formed in the seat, the output shaft of each second electric cylinder is connected downwards into the corresponding stepped hole, an air pipe connecting hole communicated with the movable cavity is formed in the center of the seat, and the air pipe connecting hole is a conical hole with the opening size of the top end larger than the opening size of the bottom of the air pipe connecting hole.

Preferably, the bottom of the filter plate is provided with a punching cavity facing downwards, and the filter holes in the filter plate are communicated with the punching cavity.

Preferably, the side wall of the bottom end of the oil production pipe is provided with an idler wheel which is positioned at the lower side of the flushing cavity, and the middle part of the steel wire is wound on the idler wheel, so that the steel wire enters the return pipe from the bottom end of the filter plate through the idler wheel.

Compared with the prior art, the invention has the advantages that the bottom end of the oil production pipe is provided with the base, the base is internally provided with the movable cavity with larger space, the top end of the oil pipe positioned in the oil well is connected in the movable cavity when in actual use, the filter plate is arranged in the movable cavity, the device is also provided with the detection cabin, when the detection cabin detects that oil in the oil production pipe contains a large amount of impurities, the filter plate can shield the lower part of the oil production pipe to filter the oil entering the pipe cavity of the oil production pipe, otherwise, if the impurities in the oil production pipe are less, the filter plate leaves the lower part of the oil production pipe, the oil is normally fed into the oil production tree along the oil production pipe, therefore, the actions of the filter plate are determined by the content of the impurities in the oil, when the impurities in the oil are less, the filter plate does not need to shield the lower part of the oil production pipe, so that the gas from the underground oil pipe can not be influenced by the filter plate shielding the lower part of the oil production pipe when entering the oil production pipe.

The outer wall surface of the tension spring is contacted with the inner wall of the pipe cavity of the oil production pipe, when the output shaft of the first electric cylinder retracts inwards, the filter plate is pulled through the steel wire, the filter plate is forced to be pulled to one side close to the movable cavity from the lower part of the oil production pipe, the tension spring stretches along with the movement of the filter plate, and the tension spring can just scrape the dirt remained on the inner wall of the oil production pipe during oil pumping in the stretching process to achieve the purpose of cleaning the wall.

Drawings

FIG. 1 is a schematic diagram of the overall construction of a dual thermal recovery wellhead provided in the present invention;

FIG. 2 is a schematic view of the inner structure of the movable chamber of the present invention after being cut open;

FIG. 3 is an enlarged view of part A of the present invention, which is drawn from FIG. 2:

FIG. 4 is a schematic view of another rotated view from FIG. 2;

FIG. 5 is a schematic view of the present invention showing the position relationship and structure of the components in the movable chamber after the base is removed;

fig. 6 is a structural diagram of the bottom view of the present invention to more visually observe the position and structure of the tension springs and the filter plate.

Detailed Description

The technical solutions of the present invention will be described in detail and fully with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 6, the present embodiment provides a dual-tube thermal recovery wellhead device, which comprises an oil production tube 1 and a base 2, wherein the base 2 is connected to the bottom of the oil production tube 1 through a flange, a movable chamber 3 communicated with the tube cavity of the oil production tube 1 is arranged in the base 2, an annular detection chamber 6 is sleeved on the outer wall of the base 2, an outer packing tube 7 is convexly arranged at the bottom end of the detection chamber 6, a communicating tube 8 penetrates through the side wall of the movable chamber 3, a concave cavity 9 opened on the side wall of the movable chamber 3 is arranged at the bottom end of the communicating tube 8, specifically, a concave cavity 9 is concavely arranged on the side wall of the feeding chamber 3, the concave cavity 9 is positioned below the communicating tube 8, the top end of the communicating tube 8 is connected with the bottom end of the outer packing tube 7, a sampling tube 10 penetrates through the communicating tube 8, the top end of the sampling tube 10 penetrates through the outer packing tube 7 and enters the detection chamber 6, a liquid collecting cover 11 positioned in the concave cavity 9 is arranged at the bottom end of the outer packing tube 7, the bottom opening of the liquid collecting cover 11 is sealed on the bottom surface of the concave cavity 9, a first electric cylinder 12 and a controller 13 for controlling the electrification of the first electric cylinder 12 are arranged on the outer wall of the base 2, a return pipe 14 is further connected between the detection cabin 6 and the movable cavity 3 in a penetrating manner, a hinged seat 4 is arranged on the inner wall surface of the movable cavity 3, a filter plate 5 capable of rotating up and down is arranged in the movable cavity 3 through the hinged seat 4, a liquid inlet of the return pipe 14 penetrates through the movable cavity 3, the return pipe 14 is located below the filter plate 5, the bottom end of the filter plate 5 is connected with a steel wire 15, and the other end of the steel wire 15 outwards penetrates through the return pipe 14 and is connected onto an output shaft of the first electric cylinder 12.

When the well head device is used practically, an oil pipe in a deep well can be connected to the movable cavity 3, oil in the deep well is required to enter the movable cavity 3 and then rise into the oil extraction pipe 1 from the movable cavity 3, and finally the oil is distributed into each branch pipeline through the oil extraction pipe 1, which is the prior art and is not detailed any more, the important description of the invention is that the oil entering the movable cavity 3 cannot be pure, otherwise, subsequent petroleum extraction cannot be carried out, but if more impurities in the oil entering the movable cavity 3 can possibly cause blockage of the movable cavity 3 and the oil extraction pipe 1, the oil extraction depths of the oil wells are different, the impurity contents of the oil wells are different, the detection function is arranged on the movable cavity 3 of the structure, the oil sampling detection can be carried out, and the operation process is as follows: the operator presses the sampling tube 10 extending upwards downwards to make the sampling tube 10 move downwards along the communicating tube 8, finally the liquid collecting cover 11 at the bottom end is separated from the cavity 9 to the lower side, at this time, a small part of oil flowing upwards in the tube cavity of the oil production tube 1 is blocked and collected by the liquid collecting cover 11, under the action of air pressure during gas assistance and oil drainage of the underground air tube, the part of oil flows into the detection chamber 6 along the sampling tube 10, then the sampling tube 10 is pulled upwards to return the liquid collecting cover 11 to the cavity 9, after sampling is finished, the part of oil collected in the detection chamber 6 flows back to the movable chamber 3 again through the return tube 14, if the sampled oil contains a large amount of impurities, the impurities are deposited in the detection chamber 6, at this time, the controller 13 is pressed down to enable the first electric cylinder 12 to be electrified and operated, so that the output shaft of the first electric cylinder extends outwards, at the moment, the steel wire 15 is lengthened, the filter plate 5 is released and rotates upwards under the action of the tension spring 16 and is shielded below the oil production pipe 1, so that the oil is filtered before entering the oil production pipe 1, whether the impurities in the oil are reduced or not is detected again in the same way after a period of time, if the impurities are reduced, the first electric cylinder 12 is controlled to be electrified again to work, the output shaft of the first electric cylinder is retracted inwards, the filter plate 5 is pulled through the steel wire 15 when the output shaft is retracted inwards, the filter plate 5 is forced to be pulled to one side of the movable cavity 3 from the lower part of the oil production pipe 1, at the moment, when the oil in the oil well is conveyed into the oil production pipe 1 under the assistance of air pressure, the air pressure cannot be influenced by the fact that the filter plate 5 is shielded below the oil production pipe 1, namely, the filtering effect of the filter plate 5 is controllable, the filtering action of the filter plate 5 is determined by the content of the impurities in the oil, when impurity is less in fluid, need not filter 5 and shelter from in the below of oil production pipe 1, filter 5 uses in a flexible way.

Specifically, the sampling tube 10 is a flexible rubber tube, the bottom end of the sampling tube 10 is inclined, the liquid collecting cover 11 is blocked by the concave cavity 9 after entering the concave cavity 9 to bend the lower part of the sampling tube 10, and then the liquid collecting cover 11 with the downward opening is deflected to the lower side due to the blocking of the concave cavity 9, when the liquid collecting cover 11 is moved out of the concave cavity 9, the sampling tube 10 pushes the liquid collecting cover 11 into the movable cavity 3, the petroleum in the petroleum extraction tube 1 is cut into the detection cabin 6 through the sampling tube 10, the sampling tube 10 is pushed downward to force the liquid collecting cover 11 to be separated from the concave cavity 9, the sampling tube 10 is pulled up after the petroleum extraction is finished, the liquid collecting cover 11 is accommodated in the concave cavity 9, and the bottom end opening of the liquid collecting cover 11 is sealed on the bottom surface of the concave cavity 9 when the liquid collecting cover 11 enters the concave cavity 9, so that the sampling tube 10 is closed in advance without installing a valve, and the sampling is finished, the purpose of stopping the oil feeding is achieved, and the structure is ingenious.

Specifically, the top of sampling tube 10 upwards stimulates and makes collection liquid cover 11 bring into cavity 9 in, and the top height of sampling tube 10 is higher than the height of detecting cabin 6, and the top of sampling tube 10 is equipped with and keeps off ring 24 for when sampling tube 10 was pressed, it is spacing to sampling tube 10 to keep off ring 24, prevents that sampling tube 10 from getting into communicating pipe 8 and difficult taking out rational in infrastructure.

Specifically, a tension spring 16 is arranged in a pipe cavity of the oil production pipe 1, the bottom end of the tension spring 16 is connected to the top surface of the filter plate 5 and used for forming an upward tension force on the filter plate 5, when the output shaft of the first electric cylinder 12 extends outwards, the tension spring 16 is pulled upwards under the releasing action of the steel wire 15, the filter plate 5 is forced to rotate upwards until the output shaft is shielded below the oil production pipe 1, and a filtering effect is formed on oil before entering the oil production pipe 1.

Specifically, in one embodiment, the tension spring 16 is wound in one circle, and the outer wall of each circle abuts against the circumferential surface of the inner wall of the oil production pipe. The outer wall surface of the tension spring 16 is contacted with the inner wall of the pipe cavity of the oil production pipe 1, when the output shaft of the first electric cylinder 12 retracts inwards, the filter plate 5 is pulled through the steel wire 15, the filter plate 5 is forced to be pulled to one side close to the movable cavity 3 from the lower part of the oil production pipe 1, the tension spring 16 stretches along with the movement of the filter plate 5, the tension spring 16 can just scrape the wall of the dirt remained on the inner wall of the oil production pipe 1 during oil pumping in the stretching process, and therefore the function of the tension spring 16 can be further expanded.

Specifically, the bottom surface of the inner cavity of the detection cabin 6 is provided with the plush plate 18, when the petroleum intercepted in the detection cabin 6 flows back to the movable cavity 3 along the return pipe 14, impurities in the petroleum are better deposited in the detection cabin 6 through the plush on the plush plate 18.

Specifically, two second electric cylinders 20 are symmetrically arranged on the outer wall surface of the base 2, a seat 19 is arranged at the bottom end of the base 2, stepped holes 21 corresponding to the bottoms of the two second electric cylinders 20 are formed in the seat 19, output shafts of the second electric cylinders 20 are connected downwards into the stepped holes 21, an air pipe connecting hole 22 communicated with the movable cavity 3 is formed in the center of the seat 19, the air pipe connecting hole 22 is a conical hole with the top opening size larger than the bottom opening size of the seat, when the two second electric cylinders 20 are powered on, the output shafts of the second electric cylinders extend downwards to force the base 2 to lift up all parts at the top so as to separate the seat 19 from the base 2, and therefore, the tension spring 16 is stretched in a pipe cavity of the oil production pipe 1 in a mode of frequently pulling the filter plate 5 downwards, and oil dirt on the inner wall of the pipe cavity of the oil production pipe 1 is completely cleaned.

It is specific, the bottom of filter 5 is equipped with towards the chamber 23 towards the below, filter hole on the filter 5 with towards chamber 23 and communicate with each other, even filter 5 shelters from the atmospheric pressure that can influence entering oil production pipe 1 when being used for filtering fluid in oil production pipe 1's below, towards the gas in the chamber 23 and can wear filter 5 to spray to oil production pipe 1, make filter 5 shelter from when oil production pipe 1's below, furthest's assurance atmospheric pressure can pass through oil pipe propelling movement to activity chamber 3 with the oil in the well in, again through the gas in activity chamber 3 with towards the gas in the chamber 23, with oil propelling movement to oil production pipe 1 in, rational in infrastructure.

For example, in one embodiment, the bottom end side wall of the riser 1 is provided with an idler wheel located on the underside of the flushing chamber 23, and the middle of the wire 15 is wound around the idler wheel so that the wire 15 passes from the bottom end of the filter plate 5 via the idler wheel and into the return pipe 14.

The above-described embodiments further explain the object, technical means, and advantageous effects of the present invention in detail. It should be understood that the above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. It should be understood that any modifications, equivalents, improvements and the like, which come within the spirit and principle of the invention, may occur to those skilled in the art and are intended to be included within the scope of the invention.

Claims

1. The utility model provides a double-barrelled thermal recovery wellhead assembly, includes oil production pipe (1) and base (2), and base (2) are through flange joint in the bottom of oil production pipe (1), its characterized in that: a movable cavity (3) communicated with the tube cavity of the oil production tube (1) is arranged in the base (2), an annular detection cabin (6) is sleeved on the outer wall of the base (2), an outer wrapping tube (7) is convexly arranged at the bottom end of the detection cabin (6), a communicating tube (8) penetrates through the side wall of the movable cavity (3), a concave cavity (9) formed in the side wall of the movable cavity (3) is arranged at the bottom end of the communicating tube (8), the top end of the communicating tube (8) is connected with the bottom end of the outer wrapping tube (7), a sampling tube (10) penetrates through the communicating tube (8), the top end of the sampling tube (10) penetrates through the outer wrapping tube (7) and enters the detection cabin (6), a liquid collection cover (11) positioned in the concave cavity (9) is arranged at the bottom end of the outer wrapping tube (7), the bottom end opening of the liquid collection cover (11) is sealed on the bottom surface of the concave cavity (9), a first electric cylinder (12) and a controller (13) for controlling the power-on action of the first electric cylinder (12) are arranged on the outer wall of the base (2), it has back flow (14) still to run through between detection cabin (6) and activity chamber (3), be equipped with articulated seat (4) on the internal face in activity chamber (3), be equipped with filter (5) that can rotate from top to bottom in activity chamber (3) through articulated seat (4), the inlet of back flow (14) runs through in activity chamber (3), and back flow (14) are located the below of filter (5), the bottom of filter (5) is connected with steel wire (15), the other end of steel wire (15) outwards runs through back flow (14) and connects on the output shaft of first electric jar (12).

2. The double-barreled thermal recovery wellhead assembly according to claim 1, wherein the sampling tube (10) is a flexible rubber tube, the bottom end of the sampling tube (10) is inclined, and the liquid collecting cover (11) is blocked by the cavity (9) after entering the cavity (9) to bend the lower part of the sampling tube (10), and then the liquid collecting cover (11) with the downward opening is deflected to the lateral lower part due to the blocking of the cavity (9).

3. A dual-tubing thermal recovery wellhead assembly according to claim 2 characterised in that the top end of the sampling tube (10) is adapted to bring the drip cup (11) into the cavity (9) when pulled upwardly, the top end of the sampling tube (10) being at a higher elevation than the detection chamber (6), the top end of the sampling tube (10) being provided with a stop ring (24).

4. A double-barrelled thermal recovery wellhead assembly according to claim 3, characterized in that a tension spring (16) is provided in the lumen of the production tubing (1), the bottom end of the tension spring (16) is connected to the top surface of the filter plate (5), the tension spring (16) is wound into a circle, and the outer wall of each circle abuts against the circumferential surface of the inner wall of the production tubing (1).

5. A dual tubing thermal recovery wellhead assembly according to claim 4 in which the outer wall surface of the tension spring (16) contacts the inner wall of the bore of the production tubing (1).

6. A dual pipe thermal recovery wellhead assembly according to claim 5 in which the sensing chamber (6) is provided with a wool top (18) on the underside of the chamber.

7. The double-pipe thermal recovery wellhead assembly according to claim 6, wherein the outer wall surface of the base (2) is provided with two second electric cylinders (20) which are symmetrically arranged, the bottom end of the base (2) is provided with a seat (19), the seat (19) is provided with stepped holes (21) corresponding to the bottoms of the two second electric cylinders (20), the output shafts of the second electric cylinders (20) are downwards connected into the stepped holes (21), the center of the seat (19) is provided with an air pipe connecting hole (22) communicated with the movable cavity (3), and the air pipe connecting hole (22) is a conical hole with the opening size of the top end larger than the opening size of the bottom of the air pipe connecting hole.

8. A dual pipe thermal recovery wellhead assembly according to claim 7 in which the bottom of the filter plate (5) is provided with a downwardly facing die chamber (23) and the filter openings in the filter plate (5) communicate with the die chamber (23).

9. A dual pipe thermal production wellhead assembly according to claim 8 characterised in that the side wall of the bottom end of the riser (1) is provided with an idler wheel located on the underside of the flushing chamber (23), the centre of the wire (15) being wound around the idler wheel so that the wire (15) re-enters the return pipe (14) from the bottom end of the filter plate (5) via the idler wheel.