CN112145115B - Oil recovery well head connecting device - Google Patents

Abstract

The invention discloses a wellhead connection device for an oil production well, belonging to the field of oil well connection pipes. An oil production wellhead connection device comprises an oil inlet pipe, and a first flange is fixedly installed on the right end of the oil inlet pipe, and the first flange There is a first connecting pipe on the right side of the oil inlet pipe, the right end of the oil inlet pipe is fixedly connected and communicated with the first connecting pipe through a first flange, and a second flange is fixedly installed on the right end of the first connecting pipe. An oil outlet pipe is arranged on the right side of the second flange, and the right end of the first connecting pipe is fixedly connected and communicated with the oil outlet pipe through the second flange. In this invention, by rotating the movable pipe and fixing it on the outside of the externally threaded pipe, the first convex pipe and the second convex pipe can be connected to each other, and the special shape of the two pipes and the convex gasket can increase the tightness of oil circulation, At the same time, it is also convenient to disassemble, which can facilitate the installation and disassembly of the detection tube, and has good sealing performance, which is convenient for the staff to use.

Description

A wellhead connection device for an oil production well

technical field

The invention relates to the field of oil well connecting pipes, and more particularly, to a wellhead connecting device for oil production wells.

Background technique

Oil wells are the passages through which oil rises in oil fields. In order to observe oil and oil pipes for better oil extraction, there will be multiple connecting pipes on the wellheads of oil wells, which can facilitate the inspection and maintenance of oil and oil pipes.

When the existing detection pipeline is docked with the oil production wellhead connecting pipe, the installation and disassembly are relatively complicated, and the sealing performance of the detection pipeline is poor after installation, which brings inconvenience to the detection and maintenance work. The technician provides a wellhead connection device for an oil production well. The invention has the advantages of convenient installation and removal of the detection pipeline and good sealing, and solves the problem of inconvenient installation and removal of the detection pipeline on the oil pipe and poor sealing. question.

SUMMARY OF THE INVENTION

1. Technical problems to be solved

In view of the problems existing in the prior art, the purpose of the present invention is to provide a wellhead connection device for an oil production well, which has the advantages of being able to easily install and disassemble the detection pipeline and has good sealing performance, and solves the problem of the installation and installation of the detection pipeline on the oil pipe. The problem of inconvenient disassembly and poor sealing.

2. Technical solutions

In order to solve the above problems, the present invention adopts the following technical solutions.

A wellhead connection device for an oil production well, comprising an oil inlet pipe, the right end of the oil inlet pipe is fixedly mounted with a first flange, the right side of the first flange is provided with a first connection pipe, and the right end of the oil inlet pipe passes through the first flange. A flange is fixedly connected and communicated with the first connecting pipe, a second flange is fixedly installed on the right end of the first connecting pipe, an oil outlet pipe is arranged on the right side of the second flange, and the first connecting pipe is The right end of the oil outlet pipe is fixedly connected and communicated with the oil outlet pipe through the second flange, the top of the first connecting pipe is fixedly connected with a second connecting pipe that communicates with it, and the top of the second connecting pipe is fixedly installed with the third method. flange, the top of the third flange is provided with an externally threaded pipe, the externally threaded pipe is fixedly connected and communicated with the second connecting pipe through the third flange, and the top of the externally threaded pipe is fixedly connected with it. The first convex tube is the first convex tube, the outer threaded tube is connected with a movable tube, the inner side of the movable tube is rotatably connected with a detection tube, and the top end of the detection tube penetrates and extends to the outside of the movable tube. The bottom of the inner side of the pipe is fixedly connected with a second convex pipe, the top of the first convex pipe extends to the inner side of the second convex pipe, and the inner side of the second convex pipe is fixedly connected with a convex cushion cover, so The outside of the first convex pipe is in contact with the convex cushion sleeve, and the outside of the oil inlet pipe, the oil discharge pipe and the second connecting pipe are fixedly installed with valves.

Preferably, an annular block is fixedly connected to the inner side of the movable tube, an annular groove is formed on the outside of the detection tube, and the inner side of the annular block extends to the inner side of the annular groove.

Preferably, an oil seal is installed at the rotational connection between the inner side of the annular block and the annular groove, and the oil seal is located inside the annular groove.

Preferably, an annular support block is fixedly connected to the outside of the externally threaded pipe, an annular gasket is fixedly connected to the top of the annular support block, and the top of the annular gasket is in contact with the movable pipe.

Preferably, a pressure relief valve is fixedly installed on the outside of the first connecting pipe.

Preferably, a funnel tube is fixedly connected inside the detection tube, and the bottom of the funnel tube is fixedly connected and communicated with the second convex tube.

Preferably, an anti-skid pad is fixedly connected to the outside of the movable tube, and the material of the anti-skid pad is a rubber material.

Preferably, both the first convex tube and the second convex tube are in the shape of a truncated cone, the upper orifice of the first convex tube is smaller than the lower orifice, and the upper orifice of the second convex tube is smaller than its lower nozzle.

3. Beneficial effects

Compared with the prior art, the advantages of the present invention are:

(1) In this scheme, by wrapping the bottom of the movable tube on the outer side of the externally threaded tube, and rotating the movable tube, the movable tube is fixed on the outer side of the externally threaded tube. At this time, the detection tube and the second convex tube on the inner side are also lowered, The inner side of the second convex tube can be just clamped on the outer side of the first convex tube, and the inner side of the convex cushion sleeve is in contact with the first convex tube, the first convex tube, the second convex tube and the convex cushion The special shape matching of the sleeve can increase the force-bearing area of the first convex pipe and the second convex pipe, which can effectively increase the sealing performance of the first convex pipe and the second convex pipe, close the valve on the oil outlet pipe, oil The oil inlet pipe enters the first connecting pipe and then enters the second connecting pipe and the external threaded pipe, so that it can finally enter the detection pipe through the first convex pipe and the second convex pipe, which is convenient for the detection equipment to detect oil and pipelines through the detection pipe. For inspection and maintenance, the three valves are the switches for controlling the oil circuit on each pipeline. The first flange and the second flange are convenient for assembling the first connecting pipe, and the third flange is convenient for the replacement of the external threaded pipe, so as to avoid the wear of the external threaded pipe. When the detection tube needs to be disassembled, the movable tube can be reversely rotated so that the movable tube can be separated from the externally threaded tube. In this invention, by rotating the movable tube and fixing it on the outside of the externally threaded tube, the first convex tube and the second convex tube can be separated. The two tubes can be connected to each other, and the special shape of the two tubes and the convex gasket can increase the tightness of the oil circulation, and at the same time, it is also easy to disassemble, which can facilitate the installation and disassembly of the detection tube, and has a good sealing performance, which is convenient for the staff to use.

(2) In this solution, through the matching of the annular groove and the annular block, when the movable tube is rotated, the movable tube moves downward on the externally threaded tube, the detection tube can also be lowered, and the first convex tube can enter the second convex tube. inside.

(3) In this scheme, the sealing performance of the movable tube and the detection tube can be increased through the setting of the oil seal, so as to avoid the deterioration of the sealing performance of the first convex tube and the second convex tube after long-term use, and the oil is separated from the movable tube and the detection tube. The gap between the detection tubes overflows.

(4) In this solution, through the annular gasket on the annular support block, the sealing performance between the movable pipe and the externally threaded pipe can be increased, so as to avoid the deterioration of the sealing performance of the first convex pipe and the second convex pipe after long-term use, and Oil overflows from the gap between the movable pipe and the externally threaded pipe.

(5) In this scheme, the pressure relief valve installed can effectively avoid the pressure impact of oil on the oil pipe, ensure the service life of the pipe, and avoid the rupture of the pipe due to excessive pressure.

(6) In this solution, the funnel tube can prevent the oil from remaining in the detection tube after the detection tube is disassembled, which facilitates the flow of oil in the detection tube and is convenient for use.

(7) In this solution, the anti-skid pad can facilitate the rotation of the hand on the outside of the movable tube, so as to prevent the hand from slipping when the hand rotates outside the movable tube and it is not convenient to rotate the movable tube. Tube, rubber has good wear and corrosion resistance characteristics and is easy to use, and the material is also easy to obtain.

(8) In this solution, the special circular truncated shape of the first convex tube and the second convex tube can be matched, which can facilitate the force when the two pipes are sealed, and the indirect contact area between the two pipes is relatively large, and then the two pipes are sealed. The convex gasket seal can greatly increase the tightness of the communication between the first convex pipe and the second convex pipe, and avoid oil leakage.

Description of drawings

Fig. 1 is the front sectional structure schematic diagram of the present invention;

Figure 2 is a schematic diagram of the front three-dimensional structure of the first convex tube of the present invention;

Fig. 3 is the enlarged structural schematic diagram of A place in Fig. 1 of the present invention;

Fig. 4 is the three-dimensional structural schematic diagram of the connection relationship between the movable tube and the annular block of the present invention;

5 is a schematic diagram of the front three-dimensional structure of the second convex tube and the funnel tube of the present invention.

Description of the labels in the figure:

1. Oil inlet pipe; 2. First flange; 3. First connecting pipe; 4. Second flange; 5. Oil outlet pipe; 6. Second connecting pipe; 7. Third flange; 8. External thread pipe ; 9, the first convex tube; 10, the movable tube; 11, the detection tube; 12, the second convex tube; 13, the convex gasket; 14, the valve; 15, the annular block; 16, the annular groove; 17, Oil seal; 18, annular support block; 19, annular gasket; 20, pressure relief valve; 21, funnel pipe; 22, anti-skid pad.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. The embodiments of the present invention, and all other embodiments obtained by those of ordinary skill in the art without creative work, fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the orientations shown in the drawings or The positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "provided with", "sleeve/connection", "connection", etc., should be understood in a broad sense, such as " Connection", which can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be an internal connection between two components. of connectivity. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Please refer to FIGS. 1-5 , a wellhead connection device for an oil production well, including an oil inlet pipe 1 , a first flange 2 is fixedly installed on the right end of the oil inlet pipe 1 , and a first connection pipe 3 is arranged on the right side of the first flange 2 , The right end of the oil inlet pipe 1 is fixedly connected and communicated with the first connecting pipe 3 through the first flange 2. The right end of the first connecting pipe 3 is fixedly installed with a second flange 4, and the right side of the second flange 4 is provided with an outlet. The oil pipe 5, the right end of the first connecting pipe 3 is fixedly connected and communicated with the oil outlet pipe 5 through the second flange 4, and the top of the first connecting pipe 3 is fixedly connected with a second connecting pipe 6 that communicates with it. The top of the 6 is fixedly installed with a third flange 7, and the top of the third flange 7 is provided with an externally threaded pipe 8. The externally threaded pipe 8 is fixedly connected and communicated with the second connecting pipe 6 through the third flange 7, and the external thread The top of the pipe 8 is fixedly connected with a first convex pipe 9 that communicates with it, the external thread of the external threaded pipe 8 is connected with a movable pipe 10, and the inner side of the movable pipe 10 is rotatably connected with a detection pipe 11, and the top of the detection pipe 11 penetrates and is connected. Extending to the outside of the movable tube 10 , the bottom of the inner side of the detection tube 11 is fixedly connected with a second convex tube 12 , the top of the first convex tube 9 extends to the inner side of the second convex tube 12 , and the The inner side is fixedly connected with a convex gasket 13, the outside of the first convex pipe 9 is in contact with the convex gasket 13, the oil inlet pipe 1, the oil outlet pipe 5 and the second connecting pipe 6 are all fixedly installed with a valve 14. The bottom of the movable tube 10 is sleeved on the outer side of the externally threaded tube 8, and the movable tube 10 is rotated to fix the movable tube 10 on the outer side of the externally threaded tube 8. At this time, the detection tube 11 and the second convex tube 12 on the inner side are also lowered, and the first The inner sides of the two convex tubes 12 can be just caught on the outer side of the first convex tube 9, and the inner side of the convex cushion sleeve 13 is in contact with the first convex tube 9. The first convex tube 9 and the second convex tube 12 and the special shape matching of the convex gasket 13 can increase the force bearing area of the first convex tube 9 and the second convex tube 12, and can effectively increase the sealing of the first convex tube 9 and the second convex tube 12 Then, close the valve 14 on the oil outlet pipe 5, and the oil enters the first connecting pipe 3 from the oil inlet pipe 1 and then enters the second connecting pipe 6 and the external threaded pipe 8, so that it can finally pass through the first convex pipe 9 and the second convex pipe. The shape pipe 12 enters the detection pipe 11, which is convenient for the detection equipment to detect and maintain the oil and pipelines through the detection pipe 11. The three valves 14 are switches for controlling the oil circuit on each pipeline. The first flange 2 and the second flange 4 It is convenient to assemble the first connecting pipe 3, and the third flange 7 is convenient to replace the externally threaded pipe 8, so as to prevent the externally threaded pipe 8 from being damaged after being worn out. The threaded pipe 8 is sufficient. In this invention, by rotating the movable pipe 10 and fixing it on the outside of the externally threaded pipe 8, the first convex pipe 9 and the second convex pipe 12 can be connected to each other, and due to the special shape and convex shape of the two pipes The cushion cover 13 can increase the tightness of the oil circulation, and at the same time, it is also convenient to disassemble, and can facilitate the installation and disassembly of the detection tube 11, and has good sealing performance and is convenient for the staff to use.

Further, an annular block 15 is fixedly connected to the inner side of the movable tube 10 , an annular groove 16 is formed on the outside of the detection tube 11 , and the inner side of the annular block 15 extends to the inner side of the annular groove 16 . When it is convenient to rotate the movable tube 10 , the movable tube 10 moves downward on the externally threaded tube 8 , the detection tube 11 can also be lowered, and the first convex tube 9 can enter the inner side of the second convex tube 12 .

Further, an oil seal 17 is installed at the rotational connection between the inner side of the annular block 15 and the annular groove 16 , and the oil seal 17 is located inside the annular groove 16 . The sealing performance of the first convex pipe 9 and the second convex pipe 12 deteriorates after long-term use, and oil overflows from the gap between the movable pipe 10 and the detection pipe 11 .

Further, an annular support block 18 is fixedly connected to the outside of the externally threaded pipe 8, an annular gasket 19 is fixedly connected to the top of the annular support block 18, and the top of the annular gasket 19 is in contact with the movable pipe 10. The gasket 19 can increase the sealing performance between the movable tube 10 and the externally threaded tube 8, and avoid the deterioration of the sealing performance of the first convex tube 9 and the second convex tube 12 after long-term use, and the oil is separated from the movable tube 10 and the external threaded tube 10. The gap between the threaded pipes 8 overflows.

Further, a pressure relief valve 20 is fixedly installed on the outside of the first connecting pipe 3. The installed pressure relief valve 20 can effectively avoid the pressure impact of oil on the oil pipe, ensure the service life of the pipe, and prevent the pipe from being ruptured due to excessive pressure.

Further, a funnel tube 21 is fixedly connected to the inside of the detection tube 11, and the bottom of the funnel tube 21 is fixedly connected and communicated with the second convex tube 12. The funnel tube 21 can prevent the oil from remaining after the detection tube 11 is disassembled. In the detection tube 11, the flow of oil in the detection tube 11 is facilitated, and the use is convenient.

Further, the outside of the movable tube 10 is fixedly connected with a non-slip pad 22, and the material of the anti-slip pad 22 is a rubber material. The anti-slip pad 22 can facilitate the hand to rotate outside the movable tube 10, and prevent the hand from slipping when the hand rotates outside the movable tube 10. It is inconvenient to rotate the movable tube 10, the friction coefficient between the anti-skid pad 22 and the hand is large, and it is convenient to rotate the movable tube 10 by hand.

Further, both the first convex tube 9 and the second convex tube 12 are in the shape of a truncated cone, the upper orifice of the first convex tube 9 is smaller than its lower orifice, and the upper orifice of the second convex tube 12 is smaller than its lower orifice. The nozzle, through the special circular truncated shape of the first convex pipe 9 and the second convex pipe 12, can be matched, which can facilitate the force when the two pipes are sealed, and the indirect contact area between the two pipes is relatively large. The shape of the gasket sleeve 13 is sealed, which can greatly increase the tightness of the communication between the first convex pipe 9 and the second convex pipe 12, and avoid oil leakage.

Working principle: by wrapping the bottom of the movable tube 10 on the outer side of the externally threaded tube 8, and rotating the movable tube 10, the movable tube 10 is fixed on the outer side of the externally threaded tube 8. At this time, the detection tube 11 and the second convex tube on the inner side are detected. 12 is also lowered, the inner side of the second convex tube 12 can be just caught on the outer side of the first convex tube 9, and the inner side of the convex cushion sleeve 13 is in contact with the first convex tube 9, the first convex tube 9, The shape of the second convex tube 12 is matched to the truncated cone, which can increase the stress area between the first convex tube 9 and the second convex tube 12, and at the same time the convex gasket 13 is sealed, which can effectively increase the first convex tube 9 and the second convex tube 12. The tightness of the two convex pipes 12, close the valve 14 on the oil outlet pipe 5, the oil enters the first connecting pipe 3 from the oil inlet pipe 1, and then enters the second connecting pipe 6 and the external thread pipe 8, so that it can finally pass through the first convex pipe. The shaped pipe 9 and the second convex pipe 12 enter the detection pipe 11, which is convenient for the detection equipment to detect and maintain the oil and pipelines through the detection pipe 11. The oil seal 17 and the annular gasket 19 can further strengthen the detection pipe 11 and the external thread pipe. 8. The tightness of the connection, the three valves 14 are switches for controlling the oil circuit on each pipeline, the first flange 2 and the second flange 4 are convenient for assembling the first connecting pipe 3, and the third flange 7 is convenient for the external threaded pipe 8. Replacement, to avoid damage to the external threaded pipe 8 after wear and tear, the pressure relief valve 20 can protect the pipeline and avoid excessive pressure in the pipe. , In this invention, by rotating the movable tube 10 and fixing it on the outside of the externally threaded tube 8, the first convex tube 9 and the second convex tube 12 can be connected to each other, and due to the special shape of the two tubes and the convex cushion sleeve 13 can increase The tightness of the oil circulation is also convenient for disassembly, which can facilitate the installation and disassembly of the detection tube 11, and has good airtightness, which is convenient for the staff to use.

It should be noted that each device in this application is a common device in the market, and the specific use can be selected according to needs, and the circuit connection relationship of each device belongs to a simple series and parallel connection circuit, and there is no circuit connection. The innovative point can be easily realized by those skilled in the art, which belongs to the prior art and will not be repeated here.

The above description is only a preferred embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical scope of the present invention, according to the technical solution of the present invention and its improvement concept, equivalently replaces or changes, should be covered within the protection scope of the present invention.

Claims (7)

1. The utility model provides a production well wellhead connecting device, includes into oil pipe (1), its characterized in that: the right-hand member fixed mounting who advances oil pipe (1) has first flange (2), the right side of first flange (2) is equipped with first connecting pipe (3), the right-hand member that advances oil pipe (1) is through first flange (2) and first connecting pipe (3) fixed connection and is linked together, the right-hand member fixed mounting of first connecting pipe (3) has second flange (4), the right side of second flange (4) is equipped with out oil pipe (5), the right-hand member of first connecting pipe (3) is through second flange (4) and play oil pipe (5) fixed connection and be linked together, the top fixed connection of first connecting pipe (3) and second connecting pipe (6) that are linked together, the top fixed mounting of second connecting pipe (6) has third flange (7), the top of third flange (7) is equipped with external screw thread pipe (8), external screw thread pipe (8) are through third flange (7) and second connecting pipe (6) fixed connection and are linked together, the top fixed connection of external screw thread pipe (8) and its first flange (9) that is linked together, external screw thread pipe (10) are connected with the outside activity pipe (10) and be connected with outside and the activity pipe (11) and the activity detection pipe (10), the bottom of the inner side of the detection tube (11) is fixedly connected with a second convex tube (12), the first convex tube (9) and the second convex tube (12) are both in a circular truncated cone shape, the upper tube opening of the first convex tube (9) is smaller than the lower tube opening of the first convex tube, and the upper tube opening of the second convex tube (12) is smaller than the lower tube opening of the second convex tube; the top of first venturi tube (9) extends to the inboard of second venturi tube (12), the inboard fixedly connected with convex pad cover (13) of second venturi tube (12), the outside and the convex pad cover (13) contact of first venturi tube (9), the equal fixed mounting in outside of advancing oil pipe (1), producing oil pipe (5) and second connecting pipe (6) has valve (14).

2. A production well wellhead connection device according to claim 1, characterised in that: the inboard fixedly connected with ring block (15) of activity pipe (10), ring channel (16) have been seted up to the outside of detecting pipe (11), the inboard of ring block (15) extends to the inboard of ring channel (16).

3. A production well wellhead connection device according to claim 2, characterised in that: an oil seal (17) is installed at the rotary connection position of the inner side of the annular block (15) and the annular groove (16), and the oil seal (17) is located on the inner side of the annular groove (16).

4. A production well wellhead connection device according to claim 1, characterised in that: the outer portion of the outer threaded pipe (8) is fixedly connected with an annular supporting block (18), the top of the annular supporting block (18) is fixedly connected with an annular sealing gasket (19), and the top of the annular sealing gasket (19) is in contact with the movable pipe (10).

5. A production well wellhead connection device according to claim 1, characterised in that: and a pressure release valve (20) is fixedly arranged outside the first connecting pipe (3).

6. A production well wellhead connection device according to claim 1, characterised in that: the interior of the detection tube (11) is fixedly connected with a funnel tube (21), and the bottom of the funnel tube (21) is fixedly connected and communicated with the second convex tube (12).

7. A production well wellhead connection device according to claim 1, characterised in that: the outer portion of the movable tube (10) is fixedly connected with an anti-slip pad (22), and the anti-slip pad (22) is made of rubber materials.

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