Downhole oil production centralizer for oil fields

Abstract

The present invention provides a downhole oil production straightener for oil fields, and relates to the technical field of oil field oil production equipment. The downhole oil production straightener for oil fields includes a mounting and fixing structure fixed to the outer wall of a drill pipe, the mounting and fixing structure includes a first mounting seat and a second mounting seat, the first mounting seat and the second mounting seat are both provided with a plurality of mounting holes on their circumferential sides; the first mounting seat and the second mounting seat are both sleeved and fixed to the outer wall of the drill pipe; a support mechanism is fixedly connected to the mounting and fixing structure; and a plurality of groups of elastic buffer mechanisms are installed on the circumferential side of the support mechanism. By designing a simple rotating support mechanism and an elastic buffer mechanism, when the support seat is blocked by gravel during movement, the support seat can be buffered by a spring, and when the buffer is squeezed to the limit position, a plurality of support seats will slide sideways on the surface of the gravel as a whole, thereby realizing the overall rotation of the plurality of support seats, so as to better pass through the blocked area, and at the same time reduce friction and wear.

Description

Technical Field

[0001] The invention relates to the technical field of oil field production equipment, in particular to a downhole oil production centralizer for oil fields. Background Art

[0002] Centralizer is a cementing tool with simple manufacturing, beautiful structure, strong and durable, strong centralizing force, and overcomes the disadvantage of the original welded centralizer that is easy to desolder. It is a centralizer that can ensure the quality of drilling and cementing. There are many types of centralizers. Centralizers can be divided into two categories according to style: elastic centralizer and rigid centralizer. According to structure, they can be divided into roller type, slider type, automatic reversing type, etc. Centralizers with different structures and materials are suitable for oil wells with different types of eccentric wear.

[0003] The use of a centralizer can effectively reduce the friction between the drilling pipe and the well wall, and can also provide stable support for the drilling pipe. There are many different types of centralizers on the market, but the structural design of the existing centralizer is too simple. Although it can play a designated supporting and straightening role, when the centralizer moves on the well wall, it is easily blocked by small gravel and other objects. Since the drill pipe is in a continuous moving state, the fixed centralizer can only be forcibly pulled through even if it is blocked by stones. In the process of forcibly passing, the wear of the centralizer will be accelerated, and the resistance will also be increased, affecting the processing efficiency of the drill pipe.

[0004] Therefore, we have developed a new downhole oil production centralizer for oil fields. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a downhole oil production centralizer for oil fields, which solves the problem that the structural design of the existing centralizer is too simple. Although it can play a designated supporting and straightening role, when the centralizer moves on the well wall, it is easily blocked by other objects such as gravel. Since the drill pipe is in a continuous moving state, the fixed centralizer can only be forcibly pulled through even if it is blocked by stones. In the process of forcibly passing, the wear of the centralizer will be accelerated, and the resistance will also be increased, thereby affecting the processing efficiency of the drill pipe.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A downhole oil production centralizer for oil fields, comprising a mounting and fixing structure fixed to the outer wall of a drill pipe, wherein a supporting mechanism is fixedly connected to the mounting and fixing structure;

[0007] A plurality of sets of elastic buffer mechanisms are installed on the peripheral side of the support mechanism, and the outer sides of the plurality of sets of elastic buffer mechanisms are fixedly connected to support seats;

[0008] Both sides between the plurality of support seats are respectively fixedly connected with a first connecting frame and a second connecting frame.

[0009] Preferably, the mounting and fixing structure comprises a first mounting seat and a second mounting seat, and a plurality of mounting holes are formed on the circumference of the first mounting seat and the second mounting seat.

[0010] Through the above technical solution, the first mounting seat and the second mounting seat can support and position the supporting mechanism.

[0011] Preferably, the first mounting seat and the second mounting seat are both sleeved and fixed on the outer wall of the drill pipe.

[0012] Through the above technical solution, the first mounting seat and the second mounting seat are both fixed to the drill pipe by a plurality of fixing screws.

[0013] Preferably, the supporting mechanism comprises a first rotating support and a second rotating support, a plurality of fixing rods are fixedly connected between the first rotating support and the second rotating support, a supporting plate is fixedly connected to the center between the plurality of fixing rods, a plurality of circular holes corresponding to the fixing rods are opened on the peripheral side of the supporting plate close to the center, a plurality of fixing pipe sleeves are symmetrically arranged on both sides of the outer wall of the supporting plate, and a plurality of limiting holes are opened on the peripheral side of the supporting plate.

[0014] Through the above technical solution, the supporting mechanism is used to support the elastic buffer mechanism, and can also realize the linkage between the first rotating support and the second rotating support, so that the first rotating support and the second rotating support can rotate synchronously.

[0015] Preferably, the first rotating support and the second rotating support are rotatably connected to the first mounting seat and the second mounting seat respectively.

[0016] Through the above technical solution, the first rotating support and the second rotating support can rotate on the first mounting seat and the second mounting seat respectively.

[0017] Preferably, a through hole corresponding to the drill pipe is opened in the center of the support plate, and the multiple groups of fixed pipe sleeves are welded and fixed to both sides of the outer wall of the support plate, and the multiple groups of fixed pipe sleeves are fixedly connected to the corresponding fixed rods.

[0018] Through the above technical solution, the support plate can be stably connected and fixed to the multiple fixing rods.

[0019] Preferably, the elastic buffer mechanism comprises a limiting sleeve, and a first buffer spring and a second buffer spring are respectively sleeved on both sides of the outer wall of the limiting sleeve, and a first buffer rod and a second buffer rod are respectively slidably connected to the centers of the two ends.

[0020] Through the above technical solution, when the support seat is blocked by gravel during movement, the support seat can squeeze the first buffer spring or the second buffer spring in the moving direction, thereby realizing the movement buffering of multiple support seats. When the buffering is squeezed to the extreme position, the multiple support seats will slide sideways as a whole on the surface of the gravel, thereby realizing the overall rotation of the multiple support seats, so as to better pass through the blocked area, while also reducing friction and wear.

[0021] Preferably, the limiting sleeve is fixed at the center of the corresponding limiting hole.

[0022] Through the above technical solution, the limiting sleeve can be positioned and fixed.

[0023] Preferably, the support seat is designed as a whole in a U-shaped structure and is made of stainless steel. The edges on the outer side of the support seat are rounded, and the ends of the first buffer rod and the second buffer rod away from the limiting sleeve are respectively fixed on both sides of the inner wall of the support seat.

[0024] Through the above technical solution, the support seat with an overall U-shaped structure can not only realize the support structure, but also the rounded corner structure on the outer side of the support seat can also reduce the friction between the support seat and the well wall.

[0025] The present invention provides a downhole oil production centralizer for oil fields. It has the following beneficial effects:

[0026] 1. The downhole oil production centralizer for oil fields is designed with a simple rotating support mechanism and an elastic buffer mechanism. When the support seat is blocked by gravel during movement, the support seat can be buffered by the spring. When the buffer is squeezed to the limit position, multiple support seats will slide sideways on the surface of the gravel as a whole, thereby realizing the overall rotation of multiple support seats, so as to better pass through the blocked area, and at the same time reduce friction and wear.

[0027] 2. The downhole production centralizer used in the oil field can achieve stable support by designing the overall support seat into a U-shaped structure. At the same time, the rounded corner structure on the outside of the support seat can also reduce the friction between the support seat and the well wall, reduce resistance, and improve the processing efficiency of the drill pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the present invention from a first viewing angle;

[0029] Figure 2 It is a schematic diagram of the structure of the second viewing angle of the present invention;

[0030] Figure 3 It is a structural diagram of the main body of the centralizer of the present invention from a first perspective;

[0031] Figure 4 It is a structural diagram of the centralizer body from a second perspective of the present invention;

[0032] Figure 5 It is a schematic diagram of the installation structure of the elastic buffer mechanism of the present invention.

[0033] Among them, 1. drill pipe; 2. installation and fixing structure; 201. first mounting seat; 202. second mounting seat; 203. mounting hole; 3. supporting mechanism; 301. first rotating support; 302. second rotating support; 303. fixing rod; 304. supporting plate; 305. round hole; 306. fixing sleeve; 307. limiting hole; 4. elastic buffer mechanism; 401. limiting sleeve; 402. first buffer spring; 403. second buffer spring; 404. first buffer rod; 405. second buffer rod; 5. supporting seat; 6. first connecting frame; 7. second connecting frame. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments 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.

[0035] Example:

[0036] like Figure 1-2 As shown, an embodiment of the present invention provides a downhole oil production centralizer for oil fields, including a mounting and fixing structure 2 fixed to the outer wall of a drill pipe 1, the mounting and fixing structure 2 includes a first mounting seat 201 and a second mounting seat 202, and a plurality of mounting holes 203 are provided on the periphery of the first mounting seat 201 and the second mounting seat 202, and the first mounting seat 201 and the second mounting seat 202 can support and position a supporting mechanism 3; the first mounting seat 201 and the second mounting seat 202 are both sleeved and fixed to the outer wall of the drill pipe 1, and the first mounting seat 201 and the second mounting seat 202 are fixed to the drill pipe 1 by a plurality of fixing screws;

[0037] like Figure 3As shown in or 5, a support mechanism 3 is fixedly connected to the mounting fixed structure 2, and the support mechanism 3 includes a first rotating support 301 and a second rotating support 302, a plurality of fixed rods 303 are fixedly connected between the first rotating support 301 and the second rotating support 302, a support plate 304 is fixedly connected to the center between the plurality of fixed rods 303, a plurality of circular holes 305 corresponding to the fixed rods 303 are opened on the peripheral side of the support plate 304 near the center, a plurality of fixed pipe sleeves 306 are symmetrically arranged on both sides of the outer wall of the support plate 304, a plurality of limiting holes 307 are opened on the peripheral side of the support plate 304, and the support mechanism 3 is used to support the elastic buffer mechanism 4, and can also realize the first rotating support 301 and the second rotating support 30 2, the first rotating support 301 and the second rotating support 302 can rotate synchronously; the first rotating support 301 and the second rotating support 302 are rotatably connected to the first mounting seat 201 and the second mounting seat 202 respectively, so that the first rotating support 301 and the second rotating support 302 can rotate on the first mounting seat 201 and the second mounting seat 202 respectively; a through hole corresponding to the drill pipe 1 is opened in the center of the support plate 304, and multiple groups of fixed pipe sleeves 306 are welded and fixed on both sides of the outer wall of the support plate 304, and the multiple groups of fixed pipe sleeves 306 are fixedly connected to the corresponding fixed rods 303, so that the support plate 304 can be stably connected and fixed with multiple fixed rods 303;

[0038] like Figure 5 As shown, multiple groups of elastic buffer mechanisms 4 are installed on the peripheral side of the support mechanism 3, and the elastic buffer mechanism 4 includes a limiting sleeve 401, and the limiting sleeve 401 is fixed at the center of the corresponding limiting hole 307, so that the limiting sleeve 401 can be positioned and fixed; the first buffer spring 402 and the second buffer spring 403 are respectively sleeved on both sides of the outer wall of the limiting sleeve 401, and the centers of the two ends are respectively slidably connected with the first buffer rod 404 and the second buffer rod 405. When the support seat 5 is blocked by gravel during movement, the support seat 5 can squeeze the first buffer spring 402 or the second buffer spring 403 in the moving direction, thereby realizing the movement buffering of multiple support seats 5. When the buffering is squeezed to the limit position, the multiple support seats 5 will slide sideways on the surface of the small gravel as a whole, thereby realizing the overall rotation of the multiple support seats 5, so that the support seat 5 is out of contact with the small gravel, so that the stabilizer can better pass through the blocked area, and at the same time, it can also reduce friction and wear;

[0039] The outer sides of the multiple groups of elastic buffer mechanisms 4 are all fixedly connected with support seats 5, and the support seats 5 are designed in a U-shaped structure as a whole. The support seats 5 are made of stainless steel, and the support seats 5 made of stainless steel have higher strength and wear resistance. The edges on the outer sides of the support seats 5 are rounded, and the ends of the first buffer rod 404 and the second buffer rod 405 away from the limiting sleeve 401 are respectively fixed on both sides of the inner wall of the support seat 5, so that the support seat 5 with an overall U-shaped structure design can realize the support structure, and the rounded corner structure on the outer side of the support seat 5 can also reduce the friction between the support seat 5 and the well wall;

[0040] like Figure 4 As shown, the first connecting frame 6 and the second connecting frame 7 are fixedly connected on both sides of the multiple support seats 5. The multiple first connecting frames 6 and the second connecting frames 7 can enable the multiple support seats 5 to form a whole, so that the multiple support seats 5 can achieve synchronous rotation.

[0041] Working principle: The first mounting seat 201 and the second mounting seat 202 are fixed to the outer wall of the drill pipe 1 by multiple fixing screws, and a supporting mechanism 3 is fixedly connected to the mounting fixing structure 2. The supporting mechanism 3 is used to support the elastic buffer mechanism 4, and can also realize the linkage between the first rotating support 301 and the second rotating support 302. The first rotating support 301 and the second rotating support 302 can rotate synchronously. Multiple groups of elastic buffer mechanisms 4 are installed on the peripheral side of the supporting mechanism 3. When the support seat 5 is blocked by gravel during movement, the support seat 5 can squeeze the first buffer spring 402 or the second buffer spring 403 in the moving direction, thereby realizing the movement buffering of multiple support seats 5. When the buffer is squeezed to the limit position, the multiple support seats 5 will slide sideways on the surface of the gravel as a whole, thereby realizing the overall rotation of the multiple support seats 5, so as to better pass through the blocked area, and at the same time reduce friction and wear.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A downhole oil production centralizer for oil fields, characterized in that: The invention comprises a mounting and fixing structure (2) fixed to the outer wall of a drill pipe (1), wherein a support mechanism (3) is fixedly connected to the mounting and fixing structure (2); a plurality of groups of elastic buffer mechanisms (4) are installed on the peripheral side of the support mechanism (3), and the outer sides of the plurality of groups of elastic buffer mechanisms (4) are fixedly connected to support seats (5); a first connecting frame (6) and a second connecting frame (7) are respectively fixedly connected on both sides between the plurality of support seats (5); the mounting and fixing structure (2) comprises a first mounting seat (201) and a second mounting seat (202), a plurality of mounting holes (203) are opened on the peripheral sides of the first mounting seat (201) and the second mounting seat (202), the first mounting seat (201) and the second mounting seat (202) are both sleeved and fixed to the outer wall of the drill pipe (1), and the support mechanism (3) comprises a first rotating support (301) and a second rotating support (302), the first rotating support (301) and the second rotating support (302) are respectively fixed to the outer wall of the drill pipe (1), and the support mechanism (3) comprises a first rotating support (301) and a second rotating support (302), and the first rotating support (301) and the second rotating support (302) are respectively fixed to the outer wall of the drill pipe (1). A plurality of fixing rods (303) are fixedly connected between the two rotating supports (302); a support plate (304) is fixedly connected at the center between the plurality of fixing rods (303); a plurality of circular holes (305) corresponding to the fixing rods (303) are provided on the peripheral side of the support plate (304) near the center; a plurality of fixing sleeves (306) are symmetrically arranged on both sides of the outer wall of the support plate (304); a plurality of limiting holes (307) are provided on the peripheral side of the support plate (304); the first rotating support (301) and the second rotating support (302) are rotatably connected to the first mounting seat (201) and the second mounting seat (202) respectively; a through hole corresponding to the drill pipe (1) is provided at the center of the support plate (304); a plurality of groups of fixing sleeves (306) are welded and fixed to both sides of the outer wall of the support plate (304); and a plurality of groups of fixing sleeves (306) are fixedly connected to the corresponding fixing rods (303).

2. The downhole oil production centralizer for oil fields according to claim 1, characterized in that: The elastic buffer mechanism (4) comprises a limiting sleeve (401), a first buffer spring (402) and a second buffer spring (403) are respectively sleeved on both sides of the outer wall of the limiting sleeve (401), and a first buffer rod (404) and a second buffer rod (405) are respectively slidably connected at the centers of the two ends of the limiting sleeve (401).

3. The downhole oil production centralizer for oil fields according to claim 2, characterized in that: The limiting sleeve (401) is fixed at the center of the corresponding limiting hole (307).

4. The downhole oil production centralizer for oil fields according to claim 3, characterized in that: The support seat (5) is designed as a U-shaped structure and is made of stainless steel. The edges on the outside of the support seat (5) are all rounded, and the ends of the first buffer rod (404) and the second buffer rod (405) away from the limiting sleeve (401) are respectively fixed to the two sides of the inner wall of the support seat (5).

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