Oil pipe centralizer for protecting underground cable

Abstract

The utility model discloses an oil pipe centralizer used for protecting underground cables, and particularly relates to the technical field of underground pipes, the oil pipe centralizer comprises a sleeving assembly, three centralizing assemblies are fixedly installed on the outer side face of the sleeving assembly, and the included angle between every two centralizing assemblies is 120 degrees. According to the oil pipe for protecting the underground cable, the centralizer can be conveniently mounted on oil pipes with different radiuses, and meanwhile, the position of the supporting pulley can be adjusted according to the radius of an oil well, so that the supporting pulley is in contact with the inner wall of the oil well; the centralizer can conveniently and stably ascend and descend in an oil well through contact between the multiple supporting pulleys and the inner wall of the oil well, the guiding and centralizing effects are achieved, and therefore the situation that a cable on the outer side of an oil pipe is impacted and rubbed to be damaged due to the fact that the oil well inclines in the pipe descending process can be avoided; and therefore, oil pipes with different radiuses can be guided and supported in the process of descending into a well, and the practicability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of oil well downhole pipes, in particular to an oil pipe centralizer for protecting downhole cables. Background Art

[0002] An oil well is a hole drilled by drilling methods. Generally, after drilling to the oil layer, the oil layer casing is lowered, and oil well cement is injected into the annular space between the casing and the well wall to protect the well wall and seal the oil, gas and water layers. Then, according to the requirements of oil field development, the oil layer is perforated with a perforating gun to form a channel, and the oil pipe is lowered. The oil is raised from the bottom of the oil well to the wellhead by using appropriate inducing flow methods.

[0003] The cables and sensor lines of the submersible pumps in oil wells are lowered into the well along with the submersible pumps outside the oil pipes. The vibration of the downhole cables and sensor lines or the friction and collision between the oil pipes and the casing during the process of lifting the tubing may cause damage to the cables and sensor lines, resulting in downhole accidents and economic losses. Therefore, the Chinese patent application with the existing patent number of 201521013204.5 discloses a tubing straightener for protecting downhole cables, which includes: a straightening assembly and a fixing bolt, wherein the straightening assembly is made of rubber material, and is provided with an opening, and a fixing nut vulcanized at the opening to cooperate with the fixing bolt. The utility model can avoid direct friction between the downhole tubing and the casing, effectively protect the downhole cables and sensor lines, and prevent damage to the cables and sensor lines.

[0004] However, the oil pipe centralizer for protecting downhole cables still has some shortcomings in actual use, such as being unable to adapt to the centralization of oil pipes of various sizes. When encountering oil pipes and oil wells of different sizes, the centralization and correction effect is average. Utility Model Content

[0005] To this end, the utility model provides an oil pipe centralizer for protecting downhole cables to solve the problem in the prior art that the centralizer cannot adapt to the centralizer of oil pipes of various sizes and has a general centralizer correction effect when encountering oil pipes and oil wells of different sizes.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A tubing centralizer for protecting downhole cables, comprising a set assembly, wherein three centralizing assemblies are fixedly mounted on the outer side of the set assembly, and the angle between the three centralizing assemblies is 120 degrees;

[0008] The set assembly comprises a circular ring, six cable limit sleeves are fixedly mounted on the outer side of the circular ring, three threaded holes are opened on the outer side of the circular ring, and connecting screws are threadedly inserted in the three threaded holes;

[0009] The straightening assembly includes a mounting vertical plate, and an outer support rod is fixedly installed on the top and bottom of the front side of the mounting vertical plate. A threaded groove is opened in the outer support rod, and a threaded adjustment support rod is threadedly inserted in the threaded groove. A rotating seat is rotatably installed at one end of the threaded adjustment support rod away from the mounting vertical plate, and a supporting pulley is rotatably installed in the rotating groove of the rotating seat.

[0010] Furthermore, the mounting vertical plate is fixedly mounted on the outer side surface of the circular ring sleeve, and the circular ring sleeve is in a hollow cylindrical shape.

[0011] Furthermore, the six cable limiting sleeves are distributed in an annular shape on the outer surface of the circular ring sleeve, and the angle between two adjacent cable limiting sleeves is 60 degrees.

[0012] Furthermore, a locking nut is threadedly sleeved on the rod body of the threaded adjustment support rod.

[0013] Furthermore, the angle between the three connecting screws is set to be 120 degrees.

[0014] Furthermore, a positioning pin is fixedly installed on both sides of the bottom surface of the circular ring sleeve, and the bottom of the positioning pin is arranged in a truncated cone shape.

[0015] Furthermore, the two outer support rods are arranged at an angle, and the two outer support rods are arranged symmetrically.

[0016] Furthermore, the cable limiting sleeves are provided with cable grooves inside, and the inner walls of the cable grooves are bonded with rubber pads.

[0017] The utility model has the following advantages:

[0018] The oil pipe for protecting the downhole cable can conveniently install the centralizer on the oil pipes of different radii, and can also adjust the position of the supporting pulley according to the radius of the oil well, so that the supporting pulley contacts the inner wall of the oil well. The contact between multiple supporting pulleys and the inner wall of the oil well can make the centralizer convenient to be stably lifted and lowered in the oil well, so as to play a guiding and straightening effect, thereby preventing the oil well from tilting during the pipe lowering process, which would cause the cable on the outside of the oil pipe to be damaged by impact and friction, so as to play a guiding and supporting role for the oil pipes of different radii during the pipe lowering process, and is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0021] Figure 1 A schematic diagram of a top-down stereoscopic structure of an oil pipe centralizer for protecting downhole cables provided by the utility model;

[0022] Figure 2 A schematic diagram of the bottom-up stereoscopic structure of an oil pipe centralizer for protecting downhole cables provided by the utility model;

[0023] Figure 3 A schematic diagram of the three-dimensional structure of a set of components of an oil pipe centralizer for protecting downhole cables provided by the utility model;

[0024] Figure 4 A schematic diagram of the three-dimensional structure of a straightening assembly for protecting underground cables provided by the utility model;

[0025] In the figure: 1. Set component; 101. Ring sleeve; 102. Cable limit sleeve; 103. Cable groove; 104. Threaded hole; 105. Connecting screw; 106. Positioning pin; 2. Straightening component; 201. Mounting vertical plate; 202. External support rod; 203. Threaded groove; 204. Threaded adjustment support rod; 205. Rotating seat; 206. Support pulley; 207. Locking nut. DETAILED DESCRIPTION

[0026] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The utility model provides a technical solution: comprising a set component 1, three straightening components 2 are fixedly installed on the outer side of the set component 1, and the angle between the three straightening components 2 is 120 degrees;

[0028] The set component 1 includes a circular ring 101, six cable limit sleeves 102 are fixedly installed on the outer side of the circular ring 101, and three threaded holes 104 are opened on the outer side of the circular ring 101, and connecting screws 105 are threadedly inserted in the three threaded holes 104;

[0029] The straightening assembly 2 includes a mounting vertical plate 201, and an outer support rod 202 is fixedly installed on the top and bottom of the front side of the mounting vertical plate 201. A threaded groove 203 is opened in the outer support rod 202, and a threaded adjustment support rod 204 is threadedly inserted in the threaded groove 203. A rotating seat 205 is rotatably installed at one end of the threaded adjustment support rod 204 away from the mounting vertical plate 201, and a supporting pulley 206 is rotatably installed in the rotating groove of the rotating seat 205.

[0030] In this embodiment, the vertical mounting plate 201 is fixedly mounted on the outer surface of the annular sleeve 101, and the annular sleeve 101 is in a hollow cylindrical shape.

[0031] The six cable limiting sleeves 102 are distributed in an annular shape on the outer surface of the annular sleeve 101 , and the angle between two adjacent cable limiting sleeves 102 is 60 degrees.

[0032] A locking nut 207 is threadedly sleeved on the rod body of the threaded adjustment support rod 204 , and the threaded adjustment support rod 204 can be locked by the locking nut 207 after the threaded adjustment support rod 204 is rotated.

[0033] The angle between the three connecting screws 105 is set to be 120 degrees. The connection between the centralizer and the oil pipe can be completed by threading one end of the connecting screw 105 into the docking threaded hole opened on the surface of the oil pipe.

[0034] A positioning pin 106 is fixedly installed on both sides of the bottom surface of the circular ring sleeve 101. The bottom of the positioning pin 106 is set in a truncated cone shape, which facilitates the two positioning pins 106 to be inserted into the positioning holes opened on the two raised plate surfaces fixedly installed on the side of the circular tube.

[0035] The two outer support rods 202 are both inclined, and the two outer support rods 202 are symmetrically arranged.

[0036] The cable limiting sleeves 102 are provided with cable grooves 103 inside, and the inner walls of the cable grooves 103 are bonded with rubber pads. The cable limiting sleeves 102 can achieve the effect of bundling the cables to prevent the cables from spreading out.

[0037] Working principle: The oil pipe is composed of a circular pipe body and raised plates fixedly installed on both ends of its side surface. The raised plates on both ends are provided with positioning holes corresponding to the positioning pins 106. Furthermore, docking threaded holes corresponding to the connecting screws 105 are opened at both ends of the pipe body of the oil pipe. The stabilizer is taken out and then put on one end of the pipe body of the oil pipe. By inserting the two positioning pins 106 into the positioning holes opened on the surfaces of the two raised plates fixedly installed on the side of the circular pipe, a positioning effect can be achieved, so that the center of the stabilizer is aligned with the center of the oil pipe. After the centralizer is aligned, each connecting screw 105 is manually rotated, and one end of the connecting screw 105 is threadedly connected to the docking threaded hole opened on the surface of the oil pipe, so as to complete the connection between the centralizer and the oil pipe. Two raised plates are fixedly installed on the outer sides of oil pipes of different sizes, and the positions of the positioning holes on the raised plates always correspond to the positions of the positioning pins 106.

[0038] After the centralizer is connected to the oil pipe body, the position of the support pulley 206 can be adjusted according to the radius of the oil well, so that the support pulley 206 contacts the inner wall of the oil well. Through the contact between multiple support pulleys 206 and the inner wall of the oil well, the centralizer can be easily and stably lifted and lowered in the oil well, which plays a guiding and straightening effect, thereby preventing the oil well from tilting during the lowering process, thereby causing the cable on the outside of the oil pipe to be damaged by impact and friction. The position adjustment steps of the support pulley 206 are as follows: manually rotate each threaded adjustment support rod 204, and the length of the threaded adjustment support rod 204 protruding out of the thread groove 203 can be controlled by rotating the threaded adjustment support rod 204, so that the position of the support pulley 206 can be adjusted according to the radius of the oil well, and the support pulley 206 can be in contact with the inner wall of the oil well during the lowering of the oil pipe.

[0039] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A tubing centralizer for protecting downhole cables, characterized in that: It comprises a set component (1), three straightening components (2) are fixedly mounted on the outer side surface of the set component (1), and the angle between the three straightening components (2) is 120 degrees; The set component (1) comprises a circular sleeve (101), six cable limit sleeves (102) are fixedly mounted on the outer side of the circular sleeve (101), three threaded holes (104) are formed on the outer side of the circular sleeve (101), and connecting screws (105) are threadedly inserted in the three threaded holes (104); The straightening assembly (2) comprises a mounting vertical plate (201), an outer support rod (202) being fixedly mounted on the top and bottom of the front face of the mounting vertical plate (201), a thread groove (203) being provided in the outer support rod (202), a threaded adjustment support rod (204) being threadedly inserted in the thread groove (203), a rotating seat (205) being rotatably mounted on one end of the threaded adjustment support rod (204) away from the mounting vertical plate (201), and a supporting pulley (206) being rotatably mounted in the rotating groove of the rotating seat (205).

2. The oil pipe centralizer for protecting downhole cables according to claim 1, characterized in that: The mounting vertical plate (201) is fixedly mounted on the outer surface of the circular ring sleeve (101), and the circular ring sleeve (101) is in the shape of a hollow cylinder.

3. The oil pipe centralizer for protecting downhole cables according to claim 1, characterized in that: The six cable limiting sleeves (102) are distributed in an annular shape on the outer surface of the circular ring sleeve (101), and the angle between two adjacent cable limiting sleeves (102) is 60 degrees.

4. The oil pipe centralizer for protecting downhole cables according to claim 1, characterized in that: A locking nut (207) is threadedly sleeved on the rod body of the threaded adjustment support rod (204).

5. The oil pipe centralizer for protecting downhole cables according to claim 1, characterized in that: The included angle between the three connecting screws (105) is 120 degrees.

6. The tubing centralizer for protecting downhole cables according to claim 1, characterized in that: A positioning pin (106) is fixedly mounted on both sides of the bottom surface of the circular ring sleeve (101). The bottom of the positioning pin (106) is arranged in the shape of a truncated cone.

7. The oil pipe centralizer for protecting downhole cables according to claim 1, characterized in that: The two outer support rods (202) are both arranged obliquely, and the two outer support rods (202) are arranged symmetrically.

8. The tubing centralizer for protecting downhole cables according to claim 1, characterized in that: The cable limiting sleeve (102) is provided with a cable groove (103) inside, and the inner wall of the cable groove (103) is bonded with a rubber cushion.

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