CN112780854A

CN112780854A - Oil pipe rotation-proof connecting piece for oil field

Info

Publication number: CN112780854A
Application number: CN202110119193.2A
Authority: CN
Inventors: 袁海滨
Original assignee: Lanzhou Kaihong Zhongyuan Petroleum Technology Co ltd
Current assignee: Lanzhou Kaihong Zhongyuan Petroleum Technology Co ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-05-11

Abstract

The invention relates to an oil pipe anti-rotation connecting piece for an oil field, which comprises two connecting pipes, wherein the first ends of the two connecting pipes are connected through a fixing component, and the second ends of the two connecting pipes are provided with internal threads matched with an oil pipe; the fixed subassembly is including the inserted bar, fixed plate and the recess of locating the connecting tube tip, the fixed plate articulate in the tip of inserted bar and with be equipped with the torsional spring between the inserted bar, when the fixed plate becomes initial state, and form an acute angle between the inserted bar, the recess is located the inner wall of connecting tube, the recess with the inserted bar all is equipped with a plurality ofly and all along the crisscross setting of circumference of connecting tube, and is a plurality of the circular shape external diameter that the inserted bar encloses is less than the internal diameter of connecting tube, works as when the inserted bar inserts in the connecting tube, the fixed plate inserts the recess, this application has the connection that the petroleum pipeline can be accomplished to the petroleum pipeline that needs to rotate, and simple to operate, simple structure's effect.

Description

Oil pipe rotation-proof connecting piece for oil field

Technical Field

The invention belongs to the technical field of oil pipe connecting devices, and particularly relates to an oil pipe anti-rotation connecting piece for an oil field.

Background

Pipeline transportation is the most economical and reasonable transportation mode for crude oil transportation. The connecting mode between the oil pipes is that an oil pipe coupling is generally adopted for connecting, the oil pipe coupling is provided with a tubular coupling body, connecting internal threads are arranged at two ends of the coupling body, and when the oil pipe coupling is used for connecting the oil pipes, the oil pipe with the external threads is screwed into the connecting internal threads of the oil pipe coupling, so that a continuous petroleum transportation pipeline is formed, and continuous petroleum transportation is realized. The connection seal between the tubing coupling and the tubing in the prior art is generally that glass fiber or hemp rope is wound on the external thread of the tubing, and then the tubing wound with the glass fiber or hemp rope is screwed into the tubing coupling, and the problem of the seal form is that: firstly, the oil pipe and the oil pipe coupling are relatively troublesome to install, glass fiber or hemp ropes need to be prepared in advance, and the tightness or thickness of the hemp ropes or the glass fiber winding can influence the sealing effect and is not easy to control; second, practice shows that the sealing effect is not good and the leakage of crude oil is easy to occur in the using process when the sealing of the oil pipe and the oil pipe coupling is carried out by adopting the winding form of glass fiber or hemp rope.

In order to solve the above problems, a self-sealing tubing coupling disclosed in the document with the patent number cn201320152391.x has a tubular coupling body, connecting internal threads are provided at two ends of the coupling body, rubber sealing rings are compounded on the inner wall of the coupling body between the connecting internal threads at the two ends of the coupling body, and when the tubing is screwed into the connecting internal threads at the two ends of the coupling body, the end part of the tubing presses the rubber sealing rings and is in liquid seal with the rubber sealing rings. Adopt the self sealss tubing coupling of above-mentioned structure, because compound on the coupling body inner wall between the connection internal thread at coupling body both ends has the rubber seal ring, consequently is using the utility model discloses when connecting oil pipeline's oil pipe, oil pipe with the utility model discloses a tubing coupling butt joint is inseparable, and the oil pipe tip compresses tightly rubber seal ring and rubber seal ring between the liquid seal ring, crude oil seepage can not appear.

However, in the structure, at least one end of the petroleum pipelines connected with the two ends can rotate freely, and the coupling cannot be installed under the condition that the petroleum pipelines at the two ends cannot rotate freely, so that the operation has great limitation.

Disclosure of Invention

The invention has the advantages of no need of rotating the petroleum pipeline and coupling in connection, simple and convenient operation.

In order to solve the problems in the background art, the invention is realized by the following technical scheme:

the oil pipe anti-rotation connecting piece for the oil field comprises two connecting pipes, wherein the first ends of the two connecting pipes are connected through a fixing component, and the second ends of the two connecting pipes are provided with internal threads matched with the oil pipe;

the fixing assembly comprises an inserted bar, a fixing plate and a groove, the inserted bar, the fixing plate and the groove are arranged at the end part of the connecting pipe, the fixing plate is hinged to the end part of the inserted bar, a torsion spring is arranged between the fixing plate and the inserted bar, when the fixing plate is in an initial state, an acute angle is formed between the fixing plate and the inserted bar, the groove is formed in the inner wall of the connecting pipe, the groove and the inserted bar are both provided with a plurality of grooves which are staggered along the circumferential direction of the connecting pipe, the outer diameter of the circular shape formed by the enclosed inserted bar is smaller than the inner diameter of the connecting pipe, and when the inserted.

As a further description of the invention: and the end surface of the first end of the connecting pipe is provided with an elastic sealing ring.

As a further description of the invention: the fixed slot has been seted up on the slope on the lateral wall of recess, the inclination and the direction of fixed slot equal with the fixed plate.

As a further description of the invention: a filter screen is arranged in the connecting pipe.

As a further description of the invention: the inner wall of the connecting pipe is axially provided with an end opening for arranging a guide groove, the filter screen is provided with a guide block matched with the guide groove, and the guide block is connected with the guide groove in a sliding manner.

As a further description of the invention: the guide block is provided with a slot for inserting the filter screen.

As a further description of the invention: the side wall of the connecting pipe is provided with an impurity collecting opening close to the petroleum input side of the filter screen, the connecting pipe is connected with a valve at the impurity collecting opening, and the outlet end of the valve is detachably connected with an impurity storage box.

As a further description of the invention: the slot is obliquely arranged, so that an obtuse angle is formed between the filter screen and the plane where the opening is located after the filter screen is inserted into the slot.

Compared with the prior art, the invention has the following beneficial technical effects:

1. rotate the connecting pipe, make two connecting pipes respectively with petroleum pipeline's tip threaded connection, then insert the inserted bar of one of them connecting pipe in another connecting pipe, the fixed plate receives the extrusion this moment, along with the inserting of inserted bar, when the fixed plate removes the notch department to the recess, under the spring action of torsional spring, the fixed plate will reset, thereby insert to the recess in, petroleum pipeline connection accomplishes this moment, so not only need rotate petroleum pipeline and can accomplish petroleum pipeline's connection, and simple to operate, simple structure.

2. The fixed slot has been seted up on the slope on the lateral wall of recess, and the inclination and the direction of fixed slot equal with the fixed plate, when connecting like this, insert the inserted bar to the connecting pipe in back, stimulate the connecting pipe in the direction of another connecting pipe dorsad again for the fixed plate inserts in the fixed slot, makes like this under the non-manpower effect, and two connecting pipes are difficult for separating, have guaranteed the fastness that the petroleum pipeline connects.

3. When need be partd two connecting pipes, make two connecting pipes remove in opposite directions to take out the fixed plate from the fixed slot, then rotate the connecting pipe, under the inner wall effect of connecting pipe, the fixed plate receives the extrusion and will be close to the inserted bar, then will the inserted bar take out can, be more convenient for like this with two connecting pipes dismantlements.

4. The setting of filter screen is used for filtering the oil, open the valve, along with the transmission of oil, the impurity of crossing filters will pile up in the bottom of filter screen and collect the mouth through impurity and deposit to in the impurity savings box, when needing to clear up impurity savings box, close the valve, with impurity savings box pull down from the exit end of valve can, so both can accomplish the filtration to the oil, and can reduce the change frequency of filter screen, when clearing up impurity, need not stop the transmission of oil, work efficiency has been guaranteed.

Drawings

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

FIG. 2 is an enlarged view of the structure of portion A of FIG. 1;

FIG. 3 is an axial cross-sectional view of a connecting tube according to the present invention;

FIG. 4 is a cross-sectional view of the overall structure of the present invention, intended to show the guide grooves, guide blocks and filter screen;

fig. 5 is a radial sectional view of the connection pipe of the present invention.

1. A connecting pipe; 11. a groove; 12. an elastic sealing ring; 13. fixing grooves; 2. inserting a rod; 21. a fixing plate; 22. a torsion spring; 23. accommodating grooves; 3. a filter screen; 31. a guide block; 311. a connecting rod; 32. a guide groove; 4. a valve; 5. impurity storage box.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a detailed description of the present invention will be given below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-5, an oil pipe rotation-preventing connecting member for an oil field comprises two connecting pipes 1, the two connecting pipes 1 are connected through a fixing component, the first ends of the two connecting pipes 1 are connected through a fixing component, the second ends of the two connecting pipes are provided with internal threads matched with the external threads at the end part of the oil pipe, wherein if the inner wall at the end part of the oil pipe is provided with threads, the second ends of the connecting pipes 1 are provided with external threads matched with the second ends of the connecting pipes according to the threads arranged on the inner. In this embodiment, the connection pipe 1 is a metal circular pipe.

The fixing component comprises an inserted link 2 arranged at the end part of the connecting pipe 1, a fixing plate 21 and a groove 11, the fixing plate 21 is hinged to the end part of the inserted link 2 through a rotating shaft, a torsion spring 22 is arranged between the fixing plate 21 and the inserted link 2, when the fixing plate 21 is in an initial state, an acute angle is formed between the fixing plate 21 and the inserted link 2, and specifically, the acute angle formed between the fixing plate 21 and the inserted link 2 is 30-45 degrees; the groove 11 is formed in the inner wall of the connecting pipe 1 and matched with the fixing plate 21, specifically, the length of the groove 11 is greater than or equal to the length of the projection of the fixing plate 21 in the vertical direction, the width of the groove 11 is greater than or equal to the width of the projection of the fixing plate 21 in the vertical direction, and the depth of the groove 11 is greater than or equal to the vertical distance between the fixing plate 21 and the inserting rod 2 when the fixing plate 21 is at the initial position.

The grooves 11 and the insert rods 2 are provided with a plurality of grooves and are arranged in a staggered manner along the circumferential direction of the connecting pipe 1, the outer diameter of a circle surrounded by the plurality of insert rods 2 is smaller than the inner diameter of the connecting pipe 1, in the embodiment, the number of the insert rods 2 and the number of the grooves 11 are 3, one end of the insert rod 2, which is far away from the fixing plate 21, is connected with the inner peripheral wall of the connecting pipe 1, and the end part of the insert rod 2, which corresponds to the fixing plate 21, is provided with an accommodating groove 23 for accommodating the fixing plate 21, wherein the depth of the accommodating groove 23 is greater than or equal to the thickness of the fixing plate 21, the length of the accommodating groove 23 is greater than or equal to the length; in the process of inserting connecting pipe 1 at inserted bar 2, fixed plate 21 receives the effort of treating 1 inner wall of male connecting pipe, make torsional spring 22 take place elastic deformation, fixed plate 21 rotates to holding tank 23 in, along with the insertion of inserted bar 2, when the one end that is equipped with fixed plate 21 of inserted bar 2 removed to recess 11 department, fixed plate 21 loses connecting pipe 1 to its effort, torsional spring 22 makes fixed plate 21 reset, at this moment, fixed plate 21 will insert recess 11 under torsional spring 22's effect, it is further, torsional spring 22 can be replaced for the spring, the one end and the fixed plate 21 of spring are connected, the other end is connected with holding tank 23, the degree of depth of holding tank 23 will be greater than the thickness of fixed plate 21 this moment. The insertion rod 2 may be formed in an L shape, one end of the insertion rod is connected to the inner peripheral wall of the connection pipe 1, and the other end of the insertion rod extends out of the connection pipe 1 and is rotatably connected to the fixing plate 21, and at this time, the depth of the groove 11 is greater than the vertical distance between the outer peripheral wall of the connection pipe 1 and the upper wall of the insertion rod 2.

Specifically, a fixing groove 13 is formed in the side wall of the groove 11 in an inclined manner, the inclination angle and the direction of the fixing groove 13 are equal to those of the fixing plate 21, an elastic sealing ring 12 is arranged on the end face of the first end of the connecting pipe 1 and used for ensuring the sealing performance of the connecting pipe 1 after connection, in the embodiment, the elastic sealing ring 12 is made of rubber, the length of the inserted link 2 is 1-3mm shorter than the distance from the first end port side of the connecting pipe 1 away from the groove 11 to the first end port of the connecting pipe 1, the depth of the fixing groove 13 is 1-3mm, the compression amount and the elasticity of the elastic sealing ring 12 are determined according to actual conditions. When connecting two connecting pipes 1, insert inserted bar 2 to connecting pipe 1 in the back, with the direction pulling of connecting pipe 1 from another connecting pipe 1 to the back for fixed plate 21 inserts to fixed slot 13 in, makes like this under the non-manpower effect, and the fastness of petroleum pipeline connection has been guaranteed to two difficult separations of connecting pipe 1. In this embodiment, the notch of recess 11 is the loudspeaker form or sets up with the adjacent lateral wall slope of the lateral wall of seting up fixed slot 13 one side, make recess 11 become the trapezoidal structure that falls, when need part two connecting pipes 1 like this, make two connecting pipes 1 remove in opposite directions, take out fixed plate 21 from fixed slot 13, then rotate connecting pipe 1, under the inner wall effect of connecting pipe 1, fixed plate 21 receives the extrusion and will be close to inserted bar 2, then take out inserted bar 2 can, be more convenient for like this with two connecting pipes 1 dismantlements.

The filter screen 3 is arranged in the connecting pipe 1, specifically, the inner wall of the connecting pipe 1 is provided with an end opening along the axial direction to be provided with a guide groove 32, the filter screen 3 is provided with a guide block 31 matched with the guide groove 32, the guide block 31 is connected with the guide groove 32 in a sliding way, the guide block 31 is provided with a slot for inserting the filter screen 3, when the filter screen 3 needs to be replaced, the connecting pipe 1 is detached, then the guide block 31 slides out along the guide groove 32, the guide block 31 drives the filter screen 3 to leave the connecting pipe 1, then the filter screen 3 is taken out from the slot, and a new filter screen 3 is replaced, in this embodiment, the cross section of the guide groove 32 is T-shaped, so that the guide block 31 can be prevented from being separated from the guide groove 32 along the radial direction of the connecting pipe 1, the guide block 31 is provided with a connecting rod 311, and the guide block 31 can be taken out of the guide groove 32 by pinching the connecting rod 311, which is more convenient; in order to ensure that the filter screen 3 cannot be folded or displaced under the impulsive force of petroleum in the petroleum transmission process and ensure the filtering effect, at least one group of first magnets (not shown in the figure) is arranged at the edge of the filter screen 3, two first magnets are arranged in each group and used for clamping the filter screen 3 in the middle, when one group of first magnets is arranged, the first magnets are arranged opposite to the guide block 31, when multiple groups of first magnets are arranged, the first magnets are uniformly distributed along the circumferential direction of the filter screen 3, and second magnets or magnetic metals, such as iron, matched with the first magnets are arranged on the inner wall of the connecting pipe 1; for avoiding filter screen 3 to take place the displacement along the axial of connecting pipe 1, it is equipped with the spacing groove that is used for placing second magnet or magnetic metal to correspond first magnet on the inner wall of connecting pipe 1, break away from between first magnet for avoiding filter screen 3, can set up the arch on one of them first magnet in every group first magnet, can correspond the arch on another first magnet and set up sunkenly, when the assembly like this, with protruding penetrating filter screen 3, then make protruding and sunken alignment, two first magnet magnetic adsorption connect can.

An impurity collecting opening is formed in the side wall of the connecting pipe 1, close to the petroleum input side, of the filter screen 3, a valve 4 is connected to the impurity collecting opening on the connecting pipe 1, an outlet end of the valve 4 is detachably connected with an impurity storage box 5, and the slot is obliquely formed, so that an obtuse angle is formed between the plane where the filter screen 3 is inserted into the slot and the plane where the opening is located, in the embodiment, the obtuse angle formed between the plane where the filter screen 3 is inserted into the slot and the plane where the opening is located is 120-150 degrees, the impurity storage box 5 is in threaded connection with the outlet end of the valve 4, in the petroleum transmission process, the filter screen 3 is arranged for filtering petroleum, the valve 4 is opened, along with the transmission of the petroleum, filtered impurities can be accumulated at the bottom of the filter screen 3 and can be deposited into the impurity storage box 5 through the impurity collecting opening, and, the impurity storage box 5 is detached from the outlet end of the valve 4, so that the petroleum can be filtered, the replacement frequency of the filter screen 3 can be reduced, and the petroleum does not need to be stopped when impurities are cleaned, so that the working efficiency is ensured.

Concretely, guide block 31 and connecting rod 311 peg graft or threaded connection, guide block 31 all corresponds connecting pipe 311 on the relative both sides wall that sets up along connecting pipe 1 axial and is equipped with inserting groove or screw hole, can change the incline direction of filter screen 3 so better, and the length of guide groove 32 is greater than the distance that the impurity collection mouth is close to petroleum pipeline side to the first end terminal surface of connecting pipe 1, for further fixing filter screen 3, guide block 31 or connecting rod 311 are fixed in connecting pipe 1 through bolt (not shown in the figure), correspond the bolt (not shown in the figure) that is used for fixed guide block 31 or connecting rod 311 on the inner wall of connecting pipe 1, a plurality of fixed orificess (not shown in the figure) have been seted up, so that change the position of filter screen 3 according to the demand. In the in-service use process, only need install filter screen 3 in a connecting pipe 1 in two connecting pipes 1 for connecting petroleum pipeline, and accomplish the assembly of valve 4 and impurity receipts savings box 5 that correspond, will locate valve 4 on another connecting pipe 1 and close can, so material saving and accessory, also all assemble filter screen 3 in two connecting pipes 1, locate position and the incline direction through changing filter screen 3, make the incline direction of two filter screens 3 all unanimous, and all be located one side that the impurity collection mouth deviates from the petroleum input port, the filter effect of petroleum has been guaranteed like this.

In this embodiment, a part of the connection pipe 1 between the first end and the second end can be set as a hose (not shown in the figure), specifically, the hose is a metal hose, the metal hose not only has strong flexibility, and bending and anti-vibration capability is strong, so after the connection pipe 1 is in threaded connection with the end of the petroleum pipeline, if the inserted bar 2 is not aligned with the groove 11, at this time, under the effect of the metal hose, the first end of the connection pipe 1 is rotated to align the inserted bar with the groove 11, so the petroleum pipeline does not need to be rotated, when the connection pipe 1 and the petroleum pipeline are assembled, the position relation between the inserted bar 2 and the corresponding groove 11 does not need to be noticed intentionally, and convenience is saved in the assembling process.

The working principle of the invention is as follows: the connecting pipes 1 are rotated, so that the second ends of the two connecting pipes 1 are respectively in threaded connection with the end parts of the petroleum pipelines, then the inserted link 2 of one connecting pipe 1 is inserted into the other connecting pipe 1, at the moment, the fixing plate 21 is under the action force of the other connecting pipe 1, the torsion spring 22 deforms along with the continuous insertion of the inserted link 2, the fixing plate 21 gradually moves into the accommodating groove 23, and the inserted link 2 can be smoothly inserted into the other connecting pipe 1; along with the insertion of inserted bar 2, when fixed plate 21 moved to the notch department of recess 11, under torsional spring 22's elasticity effect, fixed plate 21 will reset to insert in the recess 11, then with connecting pipe 1 pulling of the direction of keeping away from another connecting pipe 1 to the back, make fixed plate 21 insert to fixed slot 13 in, petroleum pipeline connection accomplishes this moment, so not only need not rotate the petroleum pipeline, and simple to operate, simple structure. When needing to part two connecting pipes 1, make two connecting pipes 1 remove in opposite directions to take out fixed plate 21 from fixed slot 13, then rotate connecting pipe 1, under the inner wall effect of connecting pipe 1, fixed plate 21 receives the extrusion and will be close to inserted bar 2, then take out inserted bar 2 can, so more be convenient for dismantle two connecting pipes 1.

The embodiments given above are preferable examples for implementing the present invention, and the present invention is not limited to the above-described embodiments. Any non-essential addition and replacement made by the technical characteristics of the technical scheme of the invention by a person skilled in the art belong to the protection scope of the invention.

Claims

1. The oil pipe anti-rotation connecting piece for the oil field comprises two connecting pipes (1), and is characterized in that the two connecting pipes (1) are connected through a fixing component at first ends, and internal threads matched with the oil pipes are arranged at second ends;

the fixing assembly comprises an inserting rod (2) arranged at the end part of the connecting pipe (1), a fixing plate (21) and a groove (11), the fixing plate (21) is hinged to the end part of the inserting rod (2) and a torsion spring (22) is arranged between the fixing plate and the inserting rod (2), when the fixing plate (21) is in an initial state, an acute angle is formed between the fixing plate and the inserting rod (2), the groove (11) is formed in the inner wall of the connecting pipe (1), the groove (11) and the inserting rod (2) are both provided with a plurality of holes and are arranged in a staggered mode along the circumferential direction of the connecting pipe (1), the outer diameter of the circle surrounded by the inserting rod (2) is smaller than the inner diameter of the connecting pipe (1), when the inserting rod (2) is inserted into the connecting pipe (1), the fixing plate (21) is inserted into the groove (11.

2. The oilfield tubing anti-rotation connector of claim 1, wherein: the end face of the first end of the connecting pipe (1) is provided with an elastic sealing ring (12).

3. The oilfield tubing anti-rotation connector of claim 1, wherein: fixed slot (13) have been seted up on the slope on the lateral wall of recess (11), the inclination and the direction of fixed slot (13) are equal with fixed plate (21).

4. The oilfield tubing anti-rotation connector of claim 1, wherein: a filter screen (3) is arranged in the connecting pipe (1).

5. The oilfield tubing anti-rotation connector of claim 4, wherein: the inner wall of connecting pipe (1) has been seted up along the axial tip opening and has been set up guide way (32), be equipped with guide block (31) with guide way (32) matching on filter screen (3), guide block (31) slide with guide way (32) and be connected.

6. The oilfield tubing anti-rotation connection of claim 5, wherein: the guide block (31) is provided with a slot for inserting the filter screen (3).

7. The oilfield tubing anti-rotation connection of claim 6, wherein: be close to oil input side in filter screen (3) on the lateral wall of connecting pipe (1) and be equipped with an impurity and collect the mouth, connecting pipe (1) is gone up and is located to be connected with valve (4) in impurity collection mouth, the exit end of valve (4) can be dismantled and be connected with impurity deposit box (5).

8. The oilfield tubing anti-rotation connection of claim 7, wherein: the slot is obliquely arranged, so that an obtuse angle is formed between the plane where the filter screen (3) is inserted into the slot and the plane where the opening is located.