CN211081741U

CN211081741U - Novel hydraulic centralizer

Info

Publication number: CN211081741U
Application number: CN201920833115.7U
Authority: CN
Inventors: 蒋锐
Original assignee: Wuhan Jinbolui Precision Manufacturing Co ltd
Current assignee: Wuhan Jinbolui Precision Manufacturing Co ltd
Priority date: 2019-06-04
Filing date: 2019-06-04
Publication date: 2020-07-24
Anticipated expiration: 2029-06-04

Abstract

The utility model provides a novel hydraulic centralizer, including the urceolus, the outside arch in middle part of urceolus just is equipped with the mounting groove in the bellied outside, install the one-level piston in the mounting groove and cup joint in proper order in the outside of one-level piston and be fixed with second grade piston and tertiary piston, one-level piston, second grade piston and tertiary piston are scalable piston and can open at the ladder type bullet under the pressure effect, the outside of tertiary piston is equipped with the ring of righting fixed with tertiary piston connection, the inside of urceolus is equipped with sealing joint, all be equipped with the through-hole on mounting groove and the sealing joint, all be equipped with the earless retaining ring of axle usefulness between one-level piston and the second grade piston and between second grade piston and the tertiary piston, between one-level piston and the second grade piston and the secondary piston are equipped with the sealing washer equally. The utility model provides a pair of novel hydraulic centralizer, simple structure, convenient to use, the centralizer external diameter is little, and it is easy to go into the well.

Description

Novel hydraulic centralizer

Technical Field

The utility model relates to a centralizer, in particular to novel hydraulic power centralizer.

Background

The centralizer belongs to a well cementing tool, has simple manufacture, beautiful structure, firmness, durability and large centralizing force, overcomes the defect that the prior welding type centralizer is easy to be detached from welding, and is a centralizer capable of ensuring the well drilling and cementing quality. In a horizontal well, the casing deflects to the lower end of a well hole due to the action of gravity, so that a cement sheath at the lower end of the casing is very thin and even has no cement sheath, and the cementing quality of the place is poor. In order to improve the cementing quality, the traditional centralizer, such as a rigid centralizer and an elastic centralizer, cannot well solve the problem.

SUMMERY OF THE UTILITY MODEL

The utility model provides a novel hydraulic centralizer, its compact structure, convenient operation, the centralizer external diameter is little, and it is easy to go into the well to be not enough to the above-mentioned among the prior art.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a novel hydraulic centralizer, includes the urceolus, the outside arch in middle part of urceolus just is equipped with the mounting groove in the bellied outside, install the one-level piston in the mounting groove and cup joint in proper order in the outside of one-level piston and be fixed with second grade piston and tertiary piston, one-level piston, second grade piston and tertiary piston are scalable piston and can be opened by ladder type bullet under the pressure effect, the outside of tertiary piston is equipped with and fixes the ring of righting with tertiary piston connection, the inside of urceolus is equipped with sealing joint, all be equipped with the through-hole on mounting groove and the sealing joint, all be equipped with the earless retaining ring of axle between one-level piston and the second grade piston and between second grade piston and the tertiary piston, between one-level piston and the second grade piston and the tertiary piston are equipped.

As an improvement, the number of the mounting grooves is three, and the mounting grooves are arranged in an annular array.

As an improvement, a thread structure is arranged on the inner side of one end of the outer cylinder and used for connecting an external thread protection cover.

As an improvement, a counter bore used for installing a connecting piece is arranged in the middle of the primary piston.

As an improvement, the outer cylinder is made of rubber materials.

The utility model has the advantages that:

the utility model discloses simple structure, high durability and convenient use, through the one-level piston, the method of one deck cover one deck of second grade piston and tertiary piston, the arm of righting of centralizer compresses when going into the well, the centralizer external diameter is little like this, it is easy to go into the well, go into the well preset position in the well when the centralizer, bump the pressure behind the cement of replacement, intraductal pressure makes the arm of righting atress toward outer extension, reach the sleeve pipe of righting, the effect of well cementation quality is improved, because centralizer extension external diameter can be greater than the sheathed tube internal diameter of upper strata, the well to well hole enlargement also can reach the effect of righting.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of the outer barrel of the present invention;

fig. 3 is a schematic cross-sectional structure of the present invention;

FIG. 4 is an enlarged schematic view of the primary piston structure of the present invention;

FIG. 5 is an enlarged schematic view of the second stage piston of the present invention;

FIG. 6 is an enlarged schematic view of the three-stage piston of the present invention;

fig. 7 is an enlarged structural schematic view of the front side of the centralizing ring of the utility model;

fig. 8 is an enlarged structural diagram of the cross section of the centralizing ring of the present invention;

fig. 9 is a schematic view of a sealing joint structure according to the present invention;

fig. 10 is a schematic sectional view of the sealing joint of the present invention;

FIG. 11 is an enlarged schematic view of the earless retainer ring for a shaft according to the present invention;

reference symbol comparison table:

1-outer cylinder, 2-mounting groove, 3-primary piston, 4-secondary piston, 5-tertiary piston, 6-centralizing ring, 7-sealing joint, 8-through hole, 9-earless retainer ring for shaft, 10-thread structure and 11-countersunk hole.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

In order to make the content of the present invention more clearly understood, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the attached drawings in the embodiment of the present invention.

As shown in fig. 1-11, 1, a novel hydraulic centralizer comprises an outer cylinder 1 and is characterized in that, the middle part of the outer barrel 1 protrudes outwards, the outer side of the protrusion is provided with a mounting groove 2, a primary piston 3 is mounted in the mounting groove 2, a secondary piston 4 and a tertiary piston 5 are sequentially sleeved and fixed on the outer side of the primary piston 3, the primary piston 3, the secondary piston 4 and the tertiary piston 5 are all telescopic pistons and can be opened in a step-type manner under the action of pressure, a righting ring 6 connected and fixed with the tertiary piston 5 is arranged on the outer side of the tertiary piston 5, a sealing joint 7 is arranged in the outer cylinder 1, through holes 8 are respectively arranged on the mounting groove 2 and the sealing joint 7, shaft earless retainer rings 9 are respectively arranged between the primary piston 3 and the secondary piston 4 and between the secondary piston 4 and the tertiary piston 5, and sealing rings are also arranged between the primary piston 3 and the secondary piston 4 and between the secondary piston 4 and the tertiary piston 5.

The number of the mounting grooves 2 is three and the mounting grooves are arranged in an annular array.

And a thread structure 10 is arranged on the inner side of one end of the outer cylinder 1 and is used for connecting an external thread protective cover.

And a counter bore 11 for mounting a connecting piece is arranged in the middle of the primary piston 3.

The outer cylinder 1 is made of rubber.

In the device use, one-level piston 3, second grade piston 4 and tertiary piston 5 are scalable piston, one-level piston 3 passes through the fix with screw in mounting groove 2, second grade piston 4 and tertiary piston 5 cup joint in proper order, be equipped with sealing joint 7 on the 1 inner wall of urceolus that is equipped with mounting groove 2, ring 6 is right in the outside installation of tertiary piston 5, when going into the well, the arm of righting of centralizer compresses, the centralizer external diameter is little like this, it is easy to go into the well, the centralizer arrives well predetermined position down, bump after replacing cement, intraductal pressure of casing makes the arm of righting atress outwards expand, reach the casing of righting, the effect of well cementation quality is improved, and because the arm of righting is many, the effective area is big, thrust is big, the casing can be easily held up to a little pressure, reach the effect of righting. Meanwhile, the expanded outer diameter of the centralizer can be larger than the inner diameter of the previous layer of casing, so that the centralizer can achieve the effect of centralizing a borehole with expanded borehole diameter, and meanwhile, the centralizer can also play a role in fixing the casing because the centralizing arm is inserted into the stratum.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The novel hydraulic centralizer comprises an outer barrel (1) and is characterized in that the middle of the outer barrel (1) protrudes outwards, a mounting groove (2) is formed in the outer side of the protrusion, a first-stage piston (3) is mounted in the mounting groove (2), a second-stage piston (4) and a third-stage piston (5) are sequentially sleeved and fixed on the outer side of the first-stage piston (3), the second-stage piston (4) and the third-stage piston (5) are telescopic pistons and can be opened in a stepped mode under the action of pressure, a centralizing ring (6) fixedly connected with the third-stage piston (5) is arranged on the outer side of the third-stage piston (5), a sealing joint (7) is arranged inside the outer barrel (1), through holes (8) are formed in the mounting groove (2) and the sealing joint (7), earless retainer rings (9) for shafts are arranged between the first-stage piston (3) and the second-stage piston (4) and between the second-stage piston (4), and sealing rings are also arranged between the primary piston (3) and the secondary piston (4) and between the secondary piston (4) and the tertiary piston (5).

2. The novel hydraulic centralizer of claim 1, wherein: the number of the mounting grooves (2) is three and the mounting grooves are arranged in an annular array manner.

3. The novel hydraulic centralizer of claim 1, wherein: and a thread structure (10) is arranged on the inner side of one end of the outer cylinder (1) and is used for connecting an external thread protective cover.

4. The novel hydraulic centralizer of claim 1, wherein: and a counter bore (11) for mounting a connecting piece is arranged in the middle of the primary piston (3).

5. The novel hydraulic centralizer of claim 1, wherein: the outer cylinder (1) is made of rubber materials.