CN112081537A - Hollow sucker rod guide - Google Patents

Abstract

The application provides a hollow sucker rod guider relates to oil gas exploitation equipment field. Hollow sucker rod director includes: the number of the connectors is two, the connectors are tubular, a plurality of arc-shaped teeth are arranged on the outer wall of the first end at intervals, and external threads are arranged at the second end; the inner wall of the first end is internally provided with internal threads and tooth grooves once from the end part, the groove bottoms of the tooth grooves are arc-shaped, the number of the tooth grooves is multiple and are arranged on the inner wall of the connecting sleeve at intervals for one circle, the structure of the second end of the connecting sleeve is the same as that of the first end, the first ends of the two connectors are respectively connected with the two ends of the connecting sleeve, and the arc-shaped teeth are meshed with the tooth grooves; locking piece, for cyclic annular and be equipped with the external screw thread, the quantity of locking piece is two, respectively with the internal thread connection at adapter sleeve both ends, lock being connected of connector and adapter sleeve. The hollow sucker rod guider connector can be bent relative to the connecting sleeve to rotate for a preset angle, and can be matched with a hollow sucker rod and used for connecting a screw pump in an L-shaped horizontal well to perform drainage and mining work.

Description

Hollow sucker rod guide

technical field

The present application relates to the field of oil and gas exploitation equipment, in particular to a hollow sucker rod guide.

Background technique

As an unconventional energy source, CBM is developing very rapidly in China. With the continuous improvement of technology, L-type horizontal wells are becoming the main production well type in CBM development, and most L-type horizontal wells are drained by screw pumps.

Because the CBM well produces less water, it is necessary to inject clean water from the ground, so as to bring the pulverized coal in the well out of the ground. The traditional water injection system is to hang an aluminum-plastic pipe outside the oil pipe. However, due to the relatively large track inclination angle of the L-shaped horizontal well, the external aluminum-plastic pipes are particularly easy to be worn or flattened during the construction operation, and some connector parts are also very easy to disconnect, which often makes it impossible to carry out the water injection operation. .

In order to solve the above technical problems, the technicians thought of using hollow sucker rods in the drainage and production of L-shaped horizontal wells. Currently hollow sucker rods are used in L-shaped horizontal wells, and there are no guides that can be used to connect hollow sucker rods at bends in the well. Therefore, in order to use the hollow sucker rod to connect the screw pump for drainage in the L-shaped horizontal well, it is necessary to design a guide suitable for connecting the hollow sucker rod.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a hollow sucker rod guide, which can be connected to the hollow sucker rod, so that the hollow sucker rod can be used in L-shaped horizontal wells to be connected to a screw pump for drainage and production.

In order to solve the above-mentioned technical problems, the embodiments of the present application provide the following technical solutions:

The present application provides a hollow sucker rod guide, comprising: a connecting head, the number of the connecting head is two, the connecting head is tubular, the outer wall of the first end is provided with a plurality of arc-shaped teeth at intervals around the circumference, Both ends are provided with external threads;

A connecting sleeve, the inner wall of the first end of the connecting sleeve is once provided with internal threads and tooth grooves from the end inward, the groove bottom of the tooth groove is arc-shaped, and the number of the tooth grooves is multiple and spaced It is arranged around the inner wall of the connecting sleeve. The structure of the second end of the connecting sleeve is the same as that of the first end. The first ends of the two connecting heads are respectively connected with the two ends of the connecting sleeve. the cogging meshes;

A locking piece, the locking piece is annular and is provided with an external thread, the number of the locking piece is two, which are respectively connected with the internal threads at both ends of the connecting sleeve for locking the connecting head and the connecting sleeve Connection;

Wherein, the inner diameter of the locking piece is larger than the outer diameter of the connecting head, and the connecting head can be bent relative to the connecting sleeve at a predetermined angle of rotation.

The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

Optionally, in the aforementioned hollow sucker rod guide, the preset angle at which the connecting head can rotate relative to the connecting sleeve is 7-10 degrees.

Optionally, in the aforementioned hollow sucker rod guide, the arc of the arc-shaped teeth is 10-20 degrees, and the arc of the groove bottom of the tooth slot is 10-20 degrees.

Optionally, in the aforementioned hollow sucker rod guide, the number of arc-shaped teeth on the outer wall of the first end of the connecting head is 8-25, and they are evenly spaced around the outer wall of the first end of the connecting head. .

Optionally, in the aforementioned hollow sucker rod guide, a boss is provided in the middle of the inner wall of the connecting sleeve, which is used to define the radial movement space of the arc-shaped teeth of the connecting head together with the locking member.

Optionally, the aforementioned hollow sucker rod guide also includes:

The first hose locking head, the first hose locking head is tubular, the first end is provided with an inner thread for connecting with the outer thread of the second end of the connecting head, and the second end is configured as a sucker rod Connect the female header;

The second hose locking head, the second hose locking head has a through hole, the first end is provided with an inner thread for connecting with the outer thread of the second end of the connecting head, and the second end is configured to suck oil The rod is connected to the male head.

Optionally, in the aforementioned hollow sucker rod guide, the middle part of the inner wall of the first hose locking head is provided with a convex ring extending in the direction of the centerline, forming a through hole for matching one end of the water injection pipe.

Optionally, in the aforementioned hollow sucker rod guide, a pin hole is formed in the middle of the second hose locking head from the outer wall to the inner wall, for passing the pin to define the other end joint of the water injection pipe.

Optionally, in the aforementioned hollow sucker rod guide, the number of the pin holes is multiple, and the pin holes are evenly spaced and distributed on a circumference of the second hose lock joint.

Optionally, in the aforementioned hollow sucker rod guide, wherein the connecting head, the connecting sleeve, the locking piece, the first hose locking head, and the second hose locking head are all made of Made of stainless steel.

With the above technical solutions, the hollow sucker rod guide of the present invention has at least the following advantages:

In the hollow sucker rod guide provided by the embodiment of the present invention, the two connecting heads are connected by a connecting sleeve, the connecting head and the connecting sleeve can be relatively rotated by a preset angle, and the connecting head is tubular, and the two connecting heads are connected with the connecting sleeve. A communicating channel can be formed. In this way, when the hollow sucker rod guide provided by the embodiment of the present invention is used to connect the hollow sucker rod, the two can form a connected hollow structure, and the water injection pipe can be passed through to protect the water injection pipe from being crushed and reduce the water injection pipe. At the same time, the hollow sucker rod guide can also be bent and rotated at a preset angle, which can be applied to the inclination of the L-shaped horizontal well, so that the hollow sucker rod guide can be used in the L-shaped horizontal well and connected to the screw pump. Drainage work. In addition, compared with the solid guide, the hollow sucker rod guide in the form of hollow has a light overall weight. While considering the weight of the whole sucker rod, the outer diameter of the hollow sucker rod guide can be made by making the hollow sucker rod guide. Larger, that is, it can withstand higher torque, so that the overall structural strength is higher, and the safety and durability of use are improved.

The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, and implement it according to the content of the description, the preferred embodiments of the present invention are described in detail below with the accompanying drawings.

Description of drawings

The above and other objects, features and advantages of exemplary embodiments of the present application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present application are shown by way of example and not limitation, and like or corresponding reference numerals refer to like or corresponding parts, wherein:

Fig. 1 schematically shows a structural schematic diagram of a hollow sucker rod guide;

FIG. 2 schematically shows a schematic structural diagram of a connector of a hollow sucker rod guide;

FIG. 3 schematically shows a schematic structural diagram of a connecting sleeve of a hollow sucker rod guide;

Figure 4 schematically shows a schematic structural diagram of a first hose locking head of a hollow sucker rod guide;

FIG. 5 schematically shows a schematic structural diagram of a second hose locking head of a hollow sucker rod guide.

The labels in Figures 1-5 are:

Connecting head 1, arc tooth 11, connecting sleeve 2, tooth slot 21, boss 22, locking piece 3, first hose locking head 4, sucker rod connecting female head 41, convex ring 42, through hole 43, The second hose locking head 5 , the sucker rod connecting male head 51 , and the pin hole 52 .

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be more thoroughly understood, and will fully convey the scope of the present disclosure to those skilled in the art.

It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the usual meanings understood by those skilled in the art to which this application belongs.

As shown in FIG. 1-FIG. 3, a hollow sucker rod guide provided by an embodiment of the present invention includes: a connecting head 1, the number of the connecting head 1 is two, and the connecting head 1 is tubular, The outer wall of the first end is provided with a plurality of arc-shaped teeth 11 at intervals around the circumference, and the second end is provided with external threads;

The connecting sleeve 2, the inner wall of the first end of the connecting sleeve 2 is once provided with an internal thread and a tooth slot 21 from the end inward, the slot bottom of the tooth slot 21 is arc-shaped, and the number of the tooth slot 21 is A plurality of them are arranged at intervals around the inner wall of the connecting sleeve 2, the structure of the second end of the connecting sleeve 2 is the same as that of the first end, and the first ends of the two connecting heads 1 are respectively connected to the two ends of the connecting sleeve 2. The ends are connected, and the arc teeth 11 are engaged with the tooth slots 21;

A locking piece 3, the locking piece 3 is annular and is provided with an external thread, and the number of the locking piece 3 is two, which are respectively connected with the internal threads at both ends of the connecting sleeve 2 for locking the connecting head 1 The connection with the connecting sleeve 2;

Wherein, the inner diameter of the locking member 3 is larger than the outer diameter of the connecting head 1 , and the connecting head 1 can be bent relative to the connecting sleeve 2 by a predetermined angle of rotation.

Specifically, the hollow sucker rod guide is used to connect the hollow sucker rod so that the connecting part can be rotated, and thus is suitable for the incline of the L-shaped horizontal well. At the same time, the hollow sucker rod guide also needs to have a certain strength and certain resistance. Corrosion shape to ensure the stability of the connection and the overall durability, so you can choose stainless steel to manufacture all parts of the hollow sucker rod guide.

The main body of the connecting head 1 is tubular, which can be a blank part of the tubular structure, and then arc-shaped teeth 11 and external threads are processed at both ends respectively. Among them, the specific parameters of the external thread can be not limited, as long as the tight connection with the connecting piece can be achieved; The tooth root is the same as the tooth on the conventional gear, and the tooth tip is made into an arc shape, that is, the end of the connecting head 1 with the arc tooth 11 is in the shape of a spherical gear, so that the arc tooth 11 and the connecting sleeve 2 have a circular arc. After the tooth slot 21 is matched, the rotation of the connecting head 1 relative to the connecting sleeve 2 can be realized, thereby meeting the needs of use. It should be noted that the hollow diameter in the middle of the connector 1 needs to meet the requirements for placing the water injection pipe.

The connecting sleeve 2 is a structure that realizes the connection of the two connecting heads 1 and realizes the rotation relative to the connecting head 1. The structural size of each part needs to be adapted to the connecting head 1, and the inner wall positions of the ends at both ends are provided with internal threads. Inward, that is, in the direction of the other end, the above-mentioned tooth slots 21 are arranged. The tooth slots 21 need to be able to mesh with the arc teeth 11. The tooth slots 21 at both ends can be connected or disconnected. Attention should be paid to The setting of the internal thread cannot affect the insertion of the connector 1 into the two ends of the connector sleeve 2 , that is, it does not affect the arc teeth 11 of the connector 1 extending into the tooth slots 21 of the connector sleeve 2 . In this way, after the two connecting heads 1 extend into the two sides of the connecting sleeve 2 respectively, the arc-shaped teeth 11 of the two connecting heads 1 mesh with the tooth grooves 21 on both sides of the connecting sleeve 2 respectively, and the arc-shaped teeth 11 can be opposite to the tooth grooves 21. When the rotation occurs, the axis of rotation is perpendicular to the axis of the connecting sleeve 2, that is, it is bent and rotated relative to the connecting sleeve 2. When the pipe body of the connecting head 1 collides with the end of the connecting sleeve 2, it rotates to the maximum angle position.

Among them, the inner threads arranged at both ends of the connecting sleeve 2 can be connected with the locking piece 3 , the locking piece 3 is an annular body, is provided with an outer thread, can be sleeved on the outer wall of the connecting head 1 , and is connected with the inner thread of the connecting sleeve 2 In this way, the locking pieces 3 connected with the internal threads on both sides of the connecting sleeve 2 can prevent the connecting head 1 from being pulled out from the connecting sleeve 2, so that the connecting head 1 and the connecting sleeve 2 cannot be separated in the length direction, so that the two After the connector 1 of the end is connected with the hollow sucker rod, there is no need to worry about disconnection.

In the hollow sucker rod guide provided by the embodiment of the present invention, the two connecting heads 1 are connected by a connecting sleeve 2, and the connecting head 1 and the connecting sleeve 2 can rotate relative to a preset angle, and the connecting head 1 is tubular, and the two The connecting head 1 and the connecting sleeve 2 can form a communication channel. In this way, when the hollow sucker rod guide provided by the embodiment of the present invention is used to connect the hollow sucker rod, the two can form a connected hollow structure, and the water injection pipe can be passed through to protect the water injection pipe from being crushed and reduce the water injection pipe. At the same time, the hollow sucker rod guide can also be bent and rotated at a preset angle, which can be applied to the inclination of the L-shaped horizontal well, so that the hollow sucker rod guide can be used in the L-shaped horizontal well and connected to the screw pump. Drainage work. In addition, compared with the solid guide, the hollow sucker rod guide in the form of hollow has a light overall weight. While considering the weight of the whole sucker rod, the outer diameter of the hollow sucker rod guide can be made by making the hollow sucker rod guide. Larger, that is, it can withstand higher torque, so that the overall structural strength is higher, and the safety and durability of use are improved.

As shown in FIGS. 1-3 , in a specific implementation, the preset angle at which the connecting head 1 can rotate relative to the connecting sleeve 2 is 7-10 degrees.

Specifically, the relative connection of the connector 1 can be achieved by setting the arc of the arc-shaped teeth 11 to 10-20 degrees, for example, 19 degrees, and setting the arc of the groove bottom of the tooth slot 21 to 10-20 degrees, such as 19 degrees. The rotation angle of the sleeve 2 is to realize the relative rotation angle of the above-mentioned 7-10. In addition, other parameters of the arc-shaped teeth 11 can be set according to the needs of the overall torque of the hollow sucker rod guide. This parameter can be specified when machining the connector 1 and the connector sleeve 2 according to the actual production needs. set and handed over to the machining master to process it.

As shown in FIGS. 1-3 , in a specific implementation, the number of arc-shaped teeth 11 on the outer wall of the first end of the connector 1 is 8-25, and they are evenly spaced and distributed on the first end of the connector 1 . The outer wall of the end is round.

Specifically, through the reciprocating use simulation experiment, that is, in the case of applying the same pulling force and torsion force to the hollow sucker rod guide as the actual production situation, and then simulating the reciprocating action of the sucker rod, it is obtained that the number of arc teeth 11 is Connector 1 is the most durable at 8-25.

As shown in FIG. 1 and FIG. 3 , in a specific implementation, a boss 22 is provided in the middle of the inner wall of the connecting sleeve 2 to define the radial direction of the arc-shaped teeth 11 of the connecting head 1 together with the locking member 3 . sports space.

Specifically, the arrangement of the boss 22 limits the axial movement of the connector 1 relative to the connector sleeve 2, specifically between the locking member 3 and the boss 22, so as to ensure that the connector 1 has a certain relative to the connector sleeve 2. At the same time of the axial movement, it can also not affect the relative rotation, so as to meet the needs of use. It should be noted that the end of the boss 22 close to the center of the connecting sleeve 2 is preferably flush with the inner wall of the connecting head 1, so that the two connecting heads 1 and the connecting sleeve 2 can be connected to form a diameter of the same size, which is convenient for the water injection pipe to pass through. set in it.

As shown in FIG. 1 , FIG. 4 , and FIG. 5 , in a specific implementation, the hollow sucker rod guide provided by the embodiment of the present invention further includes:

The first hose locking head 4, the first hose locking head 4 is tubular, the first end is provided with an internal thread for connecting with the external thread of the second end of the connecting head 1, and the second end is set as The sucker rod connecting female head 41; the second hose locking head 5, the second hose locking head 5 has a through hole 43, and the first end is provided with an internal thread for connecting with the second connecting head 1 The end is connected with an external thread, and the second end is set as a sucker rod connecting male head 51 .

Specifically, the water injection pipe passing through the hollow sucker rod also needs to be segmented, that is, the water injection pipe located in the hollow sucker rod guide should be a section, so it is preferable to set the first hose locking head 4 and the second hose locking head 5 to lock the water injection pipe in the hollow sucker rod guide, so that the hollow sucker rod guide and this section of water injection pipe can be integrated, and the hollow sucker rod guide can be integrated with the water injection pipe. When the first hose locking head 4 and the second hose locking head 5 at both ends of the guide are connected to the hollow sucker rod, the water injection pipe can be connected to the water injection pipe in the hollow sucker rod respectively.

Wherein, the inner thread provided at the first end of the first hose locking head 4 needs to be matched with the outer thread at the second end of the connecting head 1, and the inner thread at the first end of the second hose locking head 5 also needs to be matched with the connecting head 1 The external thread of the second end is matched so as to be firmly connected as a whole. The sucker rod connecting female head 41 provided at the second end of the first hose locking head 4 is an internal thread female head that can be connected with the male head of the hollow sucker rod. Similarly, the sucker rod connection male head 51 provided at the second end of the second hose locking head 5, that is, the male head of external thread that can be connected with the female head of the hollow sucker rod, the specific structure can be the same as The female head of the hollow sucker rod is matched, and a ring groove for placing the sealing ring can be provided on the connecting male head 51 of the sucker rod.

Further, the middle part of the inner wall of the first hose locking head 4 is provided with a convex ring 42 extending in the direction of the centerline, forming a through hole 43 for matching one end of the water injection pipe; the second hose locking head In the middle part of 5, a pin hole 52 is opened from the outer wall to the inner wall, which is used for passing the pin to define the other end joint of the water injection pipe.

Specifically, the water injection pipe uses a high-pressure-resistant hose commonly used by technicians in the prior art, and the two ends of the water injection pipe are respectively provided with a male head and a female head of a quick pipe joint. Therefore, in order to stably fix the water injection pipe in the hollow sucker rod guide, the middle part of the inner wall of the first hose locking head 4 is provided with a convex ring 42 extending in the direction of the center line, and a through hole 43 is formed. The head can be inserted into the through hole 43, and the middle of the second hose locking head 5 is provided with a pin hole 52, the pin can be clamped on the metal step of the female head of the water injection pipe, and then the water injection pipe is limited to the hollow pump. in the oil rod guide.

Still further, in order to stably limit the water injection pipe, the number of pin holes 52 can be set to multiple, and evenly spaced and distributed on the circumference of the second hose lock joint, so that a plurality of pins can be passed through the water injection pipe. The female head is limited to improve the limiting effect of the water injection pipe.

In a specific implementation, since the environment in which the hollow sucker rod guide is used has corrosive substances such as sulfides, in order to improve the corrosion resistance of the hollow sucker rod guide, it is preferable to use all components constituting the hollow sucker rod guide. Parts, ie, the connecting head 1 , the connecting sleeve 2 , the locking piece 3 , the first hose locking head 4 , and the second hose locking head 5 are all made of stainless steel.

It is to be understood that the relevant features in the above-mentioned apparatus may refer to each other. In addition, "first", "second", etc. in the above-mentioned embodiments are used to distinguish each embodiment, and do not represent the advantages and disadvantages of each embodiment.

In the description provided herein, numerous specific details are set forth. It will be understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (10)

1. A hollow sucker rod guider, which is characterized by comprising:

the connector comprises two connectors, the connectors are tubular, a plurality of arc-shaped teeth are arranged on the outer wall of the first end at intervals around the first end, and external threads are arranged at the second end;

the connecting sleeve comprises a connecting sleeve, wherein an inner wall of a first end of the connecting sleeve is internally provided with internal threads and tooth grooves once from the end part, the bottom of each tooth groove is arc-shaped, the number of the tooth grooves is multiple and the tooth grooves are arranged at intervals on the periphery of the inner wall of the connecting sleeve, the structure of a second end of the connecting sleeve is the same as that of the first end, the first ends of two connectors are respectively connected with the two ends of the connecting sleeve, and the arc-shaped teeth are meshed with the tooth grooves;

the locking pieces are annular and provided with external threads, and the number of the locking pieces is two, the two locking pieces are respectively connected with the internal threads at the two ends of the connecting sleeve and are used for locking the connection between the connector and the connecting sleeve;

the inner diameter of the locking piece is larger than the outer diameter of the connector, and the connector can be opposite to the rotation preset angle of the bending of the connecting sleeve.

2. The hollow sucker rod guide of claim 1,

the connector can be relative the preset angle of the connecting sleeve rotation is 7-10 degrees.

3. The hollow sucker rod guide of claim 2,

the radian of the arc-shaped teeth is 10-20 degrees, and the radian of the groove bottom of the tooth groove is 10-20 degrees.

4. The hollow sucker rod guide of claim 1,

the number of the arc-shaped teeth on the outer wall of the first end of the connector is 8-25, and the arc-shaped teeth are uniformly distributed on the outer wall of the first end of the connector at intervals.

5. The hollow sucker rod guide of claim 1,

the middle part of the inner wall of the connecting sleeve is provided with a boss used for limiting the radial movement space of the arc-shaped teeth of the connecting head together with the locking piece.

6. The hollow sucker rod guide of claim 1, further comprising:

the first hose locking head is tubular, the first end of the first hose locking head is provided with internal threads for being connected with the external threads of the second end of the connecting head, and the second end of the first hose locking head is provided with a sucker rod connecting female head;

the second hose locking head, the second hose locking head has the through-hole, first end be provided with the internal thread be used for with the second end external screw thread connection of connector, the second end sets up to sucker rod connection public head.

7. The hollow sucker rod guide of claim 6,

the middle part of the inner wall of the first hose locking head is provided with a convex ring extending towards the direction of the central line to form a through hole used for being matched with one end connector of the water injection pipe.

8. The hollow sucker rod guide of claim 6,

and a pin hole is formed in the middle of the second hose locking head from the outer wall to the inner wall and used for penetrating the pin to limit the other end connector of the water injection pipe.

9. The hollow sucker rod guide of claim 8,

the number of the pin holes is multiple, and the pin holes are uniformly distributed on the periphery of the second hose lock joint at intervals.

10. The hollow sucker rod guide of claim 6,

the connector the adapter sleeve the locking piece first hose locking head second hose locking head all adopts stainless steel material to make.

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