CN220645860U

CN220645860U - Fracturing string

Info

Publication number: CN220645860U
Application number: CN202322447063.9U
Authority: CN
Inventors: 吴震
Original assignee: Petrochina Co Ltd Changqing Oilfield Branch No1 Oil Production Plant
Current assignee: Petrochina Co Ltd Changqing Oilfield Branch No1 Oil Production Plant
Priority date: 2023-09-11
Filing date: 2023-09-11
Publication date: 2024-03-22
Anticipated expiration: 2033-09-11

Abstract

The utility model relates to the technical field of oilfield fracturing and discloses a fracturing string, which comprises an injection pipe and a connecting pipe which is in sliding fit with the inner side wall of the clamping end of the injection pipe, wherein a sand control screen pipe is arranged at the lower end of the connecting pipe; the injection pipe inside wall sets up the traction assembly, the traction assembly includes: the first hole groove is symmetrically formed in the inner side wall of the clamping end of the injection pipe; one end of the pipe body is arranged at one end of the first hole groove; one end of the rod body is connected with the other end of the pipe body through a bearing; this fracturing tubular column has set up the traction assembly between injection pipe and connecting pipe, thereby drives the body of rod through the motor and rotates and wind and unwind the haulage rope, makes on the haulage rope counter weight fixture block carry out the joint with connecting the draw-in groove on the connecting pipe, and through haulage rope pulling connecting pipe slip in the injection pipe. According to the fracturing string, the ring body is arranged on the rod body, the winding range of the traction rope on the rod body is limited, and the work of a motor is prevented from being influenced.

Description

Fracturing string

Technical Field

The utility model relates to the technical field of oilfield fracturing, in particular to a fracturing string.

Background

Because the low-permeability oil reservoir is generally poor in quality and difficult to use, development contradiction is increasingly outstanding, the potential of effectively using residual oil and fully excavating the oil reservoir is becoming urgent, the requirements of cost reduction, synergy, safety and environmental protection are positively responded, factors such as investment in drilling engineering and ground pipe network engineering are comprehensively considered, and the novel side drilling of the well bore at the old well section becomes a more economic and effective process technology, namely, the original well bore is re-windowed to open a small well bore well, the oil well yield is recovered, and the high-efficiency development level is maintained. Fracturing artificially cracks a stratum, improves the flowing environment of oil in the underground, increases the yield of an oil well, and plays an important role in improving the flowing condition of the bottom of the oil well, slowing down the interlayer and improving the oil layer utilization condition. At present, when oil gas collection operation is carried out, fracturing fluid and propping agent are injected into the underground through a plurality of pipelines, the fracturing fluid and the propping agent are injected into the stratum through sand blasters on the pipelines, so that the stratum is broken and cracks are filled through the propping agent, and when oil pumping is carried out, a sand control screen pipe is required to be used for filtering.

The Chinese patent publication CN216665586U discloses a fracturing sand control integrated completion pipe column, wherein a connecting pipe and a sand control screen pipe are put into an injection pipe in the process of placing the sand control screen pipe, the sand control screen pipe is downwards displaced into a necking seat under the action of gravity and fixed through a locking mechanism, when the sand control integrated completion pipe column has stronger resistance, the sand control screen pipe is installed through a pumping pipe and the connecting pipe, external force is applied from the ground to force the connecting pipe to displace, and at the moment, the sand control screen pipe is placed outside the injection pipe, the pumping pipe is not required to be pumped out, so that the stability of a well wall is ensured.

Summarizing, the injection tube is relatively long and narrow, and the manner of solving the problem that the connection tube is blocked to move downwards by relatively strong resistance by installing the suction tube with the connection tube and applying an external force to the suction tube from the ground is relatively laborious.

Disclosure of Invention

(one) solving the technical problems

Aiming at the defects of the prior art, the utility model provides a fracturing string which has the advantages of being convenient for a user to clamp and fix the clamping end of the bottom of a connecting pipe and an injection pipe and saving labor, and solves the problem that the injection pipe is long and narrow, and the mode that the pumping pipe is blocked to move downwards by strong resistance is laborious by installing the pumping pipe and the connecting pipe and applying external force to the pumping pipe from the ground.

(II) technical scheme

In order to achieve the above purpose, the present utility model provides the following technical solutions: the fracturing string comprises an injection pipe and a connecting pipe which is in sliding fit with the inner side wall of the clamping end of the injection pipe, wherein a sand control screen pipe is arranged at the lower end of the connecting pipe;

the injection pipe inside wall sets up the traction assembly, the traction assembly includes:

the first hole groove is symmetrically formed in the inner side wall of the clamping end of the injection pipe;

one end of the pipe body is arranged at one end of the first hole groove;

one end of the rod body is connected with the other end of the pipe body through a bearing;

the motor is arranged at the other end of the rod body, and is arranged at the other end of the first hole groove and is electrically connected with an external power supply;

one end of the traction rope is arranged on the outer side wall of the rod body and is connected with an opening of the hole groove in a sliding manner;

the counterweight clamping block is arranged at the other end of the traction rope;

the connecting clamping groove is formed in the outer side wall of the connecting pipe and matched with the counterweight clamping block;

the connecting pipe lateral wall is provided with joint subassembly.

Preferably, the clamping assembly includes:

the second hole groove is symmetrically formed in the outer side walls of the two sides of the connecting pipe;

one end of the elastic piece is arranged in the second hole groove;

the clamping block is arranged at the other end of the elastic piece;

the clamping groove is formed in the inner side wall of the injection pipe, and the clamping groove is matched with the clamping block.

Preferably, the injection pipe is symmetrically provided with sliding grooves on the inner side wall, the sliding grooves are connected with the clamping grooves, and the clamping blocks are slidably connected in the sliding grooves.

Preferably, the outer side walls at two ends of the rod body are symmetrically provided with ring bodies.

Preferably, the rod body is made of a material with rough surface.

Preferably, a plurality of protrusions are uniformly arranged on the outer side wall of the rod body.

(III) beneficial effects

Compared with the prior art, the utility model provides a fracturing string, which has the following beneficial effects:

1. this fracturing tubular column has set up the traction assembly between injection pipe and connecting pipe, thereby drives the body of rod through the motor and rotates and wind and unwind the haulage rope, makes on the haulage rope counter weight fixture block carry out the joint with connecting the draw-in groove on the connecting pipe, and through haulage rope pulling connecting pipe slip in the injection pipe.

2. According to the fracturing string, the ring body is arranged on the rod body, the winding range of the traction rope on the rod body is limited, and the work of a motor is prevented from being influenced.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view showing the internal structure of the injection pipe and the connection pipe according to the present utility model;

FIG. 3 is an enlarged view of area A according to the present utility model;

FIG. 4 is a schematic view of the structure of the protrusion and ring body of the present utility model.

In the figure:

1. an injection tube;

2. a traction assembly; 21. a first hole groove; 22. a tube body; 23. a rod body; 24. a motor; 25. a traction rope; 26. a counterweight clamping block; 27. a connecting clamping groove;

3. a clamping assembly; 31. a second hole groove; 32. an elastic member; 33. a clamping block; 34. a clamping groove;

4. a connecting pipe;

5. a chute;

6. a protrusion;

7. and a ring body.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

Referring to fig. 1-4, a fracturing string comprises an injection pipe 1 and a connecting pipe 4 which is in sliding fit with the inner side wall of the clamping end of the injection pipe 1, wherein a sand control screen is arranged at the lower end of the connecting pipe 4; the connecting pipe 4 with the sand control screen pipe arranged at the lower end slides into the bottom of the injection pipe 1 from the port of the injection pipe 1 and is clamped with the clamping end at the bottom of the injection pipe 1.

The injection pipe 1 inside wall sets up the traction assembly 2, the traction assembly 2 includes: the first hole groove 21 is symmetrically formed in the inner side wall of the clamping end of the injection pipe 1; one end of the pipe body 22 is arranged at one end of the first hole groove 21; a rod body 23, one end of which is connected to the other end of the pipe body 22 through a bearing; the motor 24, the rotating shaft is set up in another end of the said rod body 23, the said motor 24 is set up in another end of the said hole slot 21 and electrically connected with external power; one end of the traction rope 25 is arranged on the outer side wall of the rod body 23 and is connected to the opening of the first hole groove 21 in a sliding manner; a counterweight clamping block 26 arranged at the other end of the traction rope 25; the connecting clamping groove 27 is formed in the outer side wall of the connecting pipe 4, and the connecting clamping groove 27 matched with the counterweight clamping block 26 is formed in the outer side wall of the connecting pipe; the outer side wall of the connecting pipe 4 is provided with the clamping assembly 3, before the injection pipe 1 is placed underground, the motor 24 is started, the motor 24 drives the rod body 23 to rotate, the traction rope 25 stretches and is carried out from the injection pipe 1 by the counterweight clamping block 26, the motor 24 is closed, after the injection pipe 1 is placed underground, the counterweight clamping block 26 is clamped with the connecting clamping groove 27 formed in the outer side wall of the connecting pipe 4, the clamping assemblies 3 on two sides of the connecting pipe 4 are attached to the inner wall of the injection pipe 1, the motor 24 is started and the connecting pipe 4 is released, the sand-preventing screen pipe arranged at the lower end is driven to slide on the inner wall of the injection pipe 1, the motor 24 rotates, the traction rope 25 is wound to the outer side wall of the rod body 23, the traction rope 25 pulls the connecting pipe 4 to slide downwards continuously to resist larger resistance generated by friction, and after the connecting pipe 4 is clamped with the clamping end at the bottom of the injection pipe 1, the motor 24 is closed.

Example two

Referring to fig. 1-3, the clamping assembly 3 includes: the second hole grooves 31 are symmetrically formed in the outer side walls of the two sides of the connecting pipe 4; an elastic member 32, one end of which is disposed in the second hole groove 31; a block 33 provided at the other end of the elastic member 32; the clamping groove 34 is formed in the inner side wall of the injection tube 1, the clamping groove 34 is matched with the clamping block 33, when the connecting tube 4 is attached to the inner wall of the injection tube 1, the clamping block 33 presses the elastic element 32 and retracts into the second hole groove 31, and when the clamping block 33 reaches the clamping groove 34, the clamping block 33 is clamped in the clamping groove 34 due to the force of the elastic element 32 restoring deformation. The spout 5 has been seted up to injection tube 1 inside wall symmetry, spout 5 is connected draw-in groove 34, fixture block 33 sliding connection in spout 5, further restriction connecting pipe 4's sliding track prevents that it from deviating from the sliding track and leading to the joint failure.

Example III

Referring to fig. 1-4, the outer side walls of the two ends of the rod body 23 are symmetrically provided with ring bodies 7, which limit the winding range of the traction rope 25 on the rod body 23 and prevent the motor 24 from being affected. The rod body 23 is made of rough surface, and friction between the rod body 23 and the traction rope 25 is increased, so that the traction rope 25 does not slip when being wound. The outer side wall of the rod body 23 is uniformly provided with a plurality of bulges 6, and the traction rope 25 is limited to prevent slipping during winding.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The fracturing string comprises an injection pipe (1) and a connecting pipe (4) which is in sliding fit with the inner side wall of the clamping end of the injection pipe (1), wherein a sand control screen pipe is arranged at the lower end of the connecting pipe (4);

the method is characterized in that: the injection pipe (1) inside wall sets up traction assembly (2), traction assembly (2) include:

the first hole groove (21) is symmetrically arranged on the inner side wall of the clamping end of the injection pipe (1);

one end of the pipe body (22) is arranged at one end of the first hole groove (21);

a rod body (23), one end of which is connected with the other end of the pipe body (22) through a bearing;

the motor (24) is arranged at the other end of the rod body (23), and the motor (24) is arranged at the other end of the first hole groove (21) and is electrically connected with an external power supply;

one end of the traction rope (25) is arranged on the outer side wall of the rod body (23) and is connected to the opening of the first hole groove (21) in a sliding manner;

a counterweight clamping block (26) arranged at the other end of the traction rope (25);

the connecting clamping groove (27) is formed in the outer side wall of the connecting pipe (4), and the connecting clamping groove (27) is matched with the counterweight clamping block (26);

the outer side wall of the connecting pipe (4) is provided with a clamping assembly (3).

2. A fracturing string according to claim 1, characterized in that: the clamping assembly (3) comprises:

the second hole groove (31) is symmetrically arranged on the outer side walls of the two sides of the connecting pipe (4);

an elastic member (32) with one end arranged in the second hole groove (31);

a clamp block (33) arranged at the other end of the elastic piece (32);

the clamping groove (34) is formed in the inner side wall of the injection pipe (1), and the clamping groove (34) matched with the clamping block (33) is formed in the inner side wall of the injection pipe.

3. A fracturing string according to claim 2, characterized in that: the injection pipe (1) is characterized in that sliding grooves (5) are symmetrically formed in the inner side wall of the injection pipe (1), the sliding grooves (5) are connected with the clamping grooves (34), and the clamping blocks (33) are slidably connected in the sliding grooves (5).

4. A fracturing string according to claim 1, characterized in that: the outer side walls at the two ends of the rod body (23) are symmetrically provided with ring bodies (7).

5. A fracturing string according to claim 4, wherein: the rod body (23) is made of a rough surface.

6. A fracturing string according to claim 5, wherein: a plurality of bulges (6) are uniformly arranged on the outer side wall of the rod body (23).