CN219081512U

CN219081512U - Drilling rod elasticity centralizer for drilling tool

Info

Publication number: CN219081512U
Application number: CN202223471159.0U
Authority: CN
Inventors: 孙阳鑫; 杨志
Original assignee: Sichuan Bao Wright Drill Co ltd
Current assignee: Sichuan Bao Wright Drill Co ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-05-26
Anticipated expiration: 2032-12-26

Abstract

The utility model relates to the technical field of well cementing tools for drilling engineering and discloses a drill rod elastic centralizer for a drilling tool, which comprises an upper end cover and a lower end cover, wherein a plurality of positioning strips are fixedly connected between the upper end cover and the lower end cover, one side wall of each positioning strip is fixedly provided with two arc plates, two adjacent arc plates are in a group, one side wall of each arc plate is provided with an arc groove, one side wall of each arc groove is provided with a mounting plate, two opposite mounting plates are in a group, a plurality of mounting plates are fixedly connected with a fixing rod, and the outer walls of the fixing rods are sleeved with a plurality of balls. According to the utility model, the drill rod elastic centralizer for the drilling tool has the effects of reducing friction to the well wall and facilitating the lowering, and meanwhile, the drill rod elastic centralizer for the drilling tool has the function of randomly changing the positions of the balls according to the caliber of the well wall.

Description

Drilling rod elasticity centralizer for drilling tool

Technical Field

The utility model relates to the technical field of well cementing tools for drilling engineering, in particular to a drill rod elastic centralizer for a drilling tool.

Background

At present, in the well cementation operation of oil and gas wells such as petroleum, natural gas and the like, the common practice is to firstly construct a well, then insert a sleeve, then construct cement slurry in the sleeve, make the cement slurry gush out from the bottom of the sleeve and then return upwards, make the cement slurry fill up an annular space between the sleeve and the well wall, finish the well cementation operation after solidification, and in the process, the sleeve needs to be ensured to be positioned in the center of the well hole, and the deviation is reduced as far as possible, so that a centralizer is required to be used, and the centralizer is sleeved on the outer wall of the sleeve. The cement slurry filling process is actually the process of displacing the drilling fluid with cement slurry. In-situ construction experience shows that in the cementing process, the sleeve is ensured to be centered, cement paste is caused to replace drilling fluid in a spiral flow mode, and the method is one of effective ways for improving the well cementation displacement efficiency and the well cementation quality.

At present, most centralizers are too troublesome when being put into a wellhead, wherein excessive friction force is easy to occur, and the situation of blockage is caused, so that the construction progress is slowed down, and the centralizers are more troublesome. Accordingly, one skilled in the art would be able to provide a drill pipe resilient centralizer for a well tool that addresses the problems set forth in the background section above.

Disclosure of Invention

The utility model aims to solve the defects in the prior art, and provides the drill rod elastic centralizer for the drilling tool, which has the effects of reducing friction on a well wall and facilitating the descending, solves the problems that the existing drill rod elastic centralizer for the drilling tool is easy to cause blockage and inconvenient to descend, and has the function of randomly changing the positions of balls according to the caliber of the well wall.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the drill rod elastic centralizer for the drilling tool comprises an upper end cover and a lower end cover, wherein a plurality of positioning strips are fixedly connected between the upper end cover and the lower end cover, two arc plates are fixedly arranged on one side wall of each positioning strip, two adjacent arc plates are in a group, one side wall of each arc plate is provided with an arc groove, one side wall of each arc groove is provided with a mounting plate, two opposite mounting plates are in a group, a fixing rod is fixedly connected between the mounting plates, and a plurality of balls are sleeved on the outer wall of each fixing rod;

the screw rods are arranged between the mounting plates in a penetrating mode, and nuts are sleeved on two sides of the outer wall of each screw rod.

Further, when the nuts are in the working state, the nuts are all propped against one side wall of the mounting plate.

Further, a plurality of locating strips are fixedly provided with two fixing plates on one side wall, and a plurality of screws are connected to one side wall of each fixing plate in a threaded mode.

Further, a plurality of balls extend out of the arc-shaped plate.

Further, none of the plurality of threaded rods interfere with the balls.

Further, the upper end cover and the lower end cover are the same in size.

The utility model has the following beneficial effects:

1. compared with the existing centralizer, the elastic centralizer for the drill rod for the drilling tool provided by the utility model has the advantages that the arc-shaped plate, the fixed rod and the balls are arranged, and under the action of the balls, when the centralizer is put into a wellhead, the friction force on the well wall can be reduced through rolling of the balls, so that the centralizer is more convenient and rapid to put into the wellhead, and the effect of being convenient to put into the wellhead is achieved.

2. Compared with the existing centralizer, the elastic centralizer for the drill rod for the drilling tool provided by the utility model has the advantages that the positions of the balls can be changed at will under the action of the arc-shaped grooves, when the centralizer needs to be replaced, the nuts are loosened, then the positions of the mounting plates are manually adjusted, the balls can be kept in a normal working state all the time under the action of the arc-shaped grooves, after the adjustment is completed, the nuts are manually screwed down, and the effect of changing the positions of the balls at will is achieved, and the well heads with different calibers are also convenient to drop.

3. Compared with the existing centralizer, the elastic centralizer for the drill rod for the drilling tool is simple in structure, convenient to operate, capable of reducing friction when being put into a wellhead, more convenient to put into, and high in practicability.

Drawings

FIG. 1 is an elevation view of a drill pipe resilient centralizer for a well tool according to the present utility model;

FIG. 2 is a schematic view of the structure of a threaded rod of a drill rod elastic centralizer for a drilling tool according to the present utility model;

FIG. 3 is a schematic view of a positioning strip of a drill pipe elastic centralizer for a drilling tool according to the present utility model;

fig. 4 is an enlarged view at a in fig. 1.

Legend description:

1. an upper end cap; 2. a lower end cap; 3. a positioning strip; 4. an arc-shaped plate; 5. a threaded rod; 6. a screw cap; 7. a fixed rod; 8. a ball; 9. a mounting plate; 10. an arc-shaped groove; 11. a fixing plate; 12. and (5) a screw.

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.

Referring to fig. 1-4, one embodiment provided by the present utility model is: the utility model provides a drilling rod elasticity centralizer for drilling tool, including upper end cover 1 and lower end cover 2, fixedly connected with a plurality of locating strips 3 between upper end cover 1 and the lower end cover 2, a plurality of locating strips 3 lateral wall all is fixed and is provided with two arc plates 4, a plurality of adjacent two of arc plates 4 are a set of, arc wall 10 has all been seted up to a multiunit arc plate 4 lateral wall, a plurality of arc wall 10 lateral wall all is provided with mounting panel 9, a plurality of mounting panel 9 are relative two a set of, all fixedly connected with dead lever 7 between the multiunit mounting panel 9, a plurality of balls 8 are all overlapped to a plurality of dead lever 7 outer walls, can utilize ball 8 to reduce friction and be convenient for the centralizer to descend through arc plate 4, arc wall 10, mounting panel 9, dead lever 7 and ball 8;

the threaded rods 5 are arranged between the plurality of groups of mounting plates 9 in a penetrating mode, nuts 6 are sleeved on two sides of the outer walls of the plurality of threaded rods 5 in a threaded mode, and the positions of the balls 8 can be changed at will under the action of the arc-shaped grooves 10 through the threaded rods 5 and the nuts 6.

The screw caps 6 are tightly propped against one side wall of the mounting plate 9 when in a working state, two fixing plates 11 are fixedly arranged on one side wall of the positioning strip 3, a plurality of screws 12 are fixedly connected to one side wall of the fixing plates 11, the positioning strip 3 can be further fixed through the fixing plates 11 and the screws 12, the plurality of balls 8 are extended out of the arc-shaped plates 4, friction between the balls 8 and a well wall can be reduced conveniently, the plurality of threaded rods 5 are not interfered with the balls 8, the situation that the balls 8 are interfered by the threaded rods 5 to cause blockage can be avoided, the sizes of the upper end cover 1 and the lower end cover 2 are the same, and the overall stability can be increased.

Working principle: when the centering guide is used, the arc-shaped plate 4, the fixed rod 7 and the balls 8 are arranged, wherein under the action of the balls 8, when the centering guide is put into a wellhead, the friction force on the well wall can be reduced through the rolling of the balls 8, the centering guide is more convenient and rapid to put down, the position of the balls 8 can be changed at will under the action of the arc-shaped grooves 10, when the centering guide needs to be replaced, the nuts 6 are only required to be loosened, then the position of the mounting plate 9 is manually adjusted, under the action of the arc-shaped grooves 10, the balls 8 can be kept in a normal working state all the time, and after the adjustment is completed, the nuts 6 are manually screwed down.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. The utility model provides a drilling rod elasticity centralizer for drilling tool, includes upper end cover (1) and lower end cover (2), its characterized in that: a plurality of locating strips (3) are fixedly connected between the upper end cover (1) and the lower end cover (2), two arc plates (4) are fixedly arranged on one side wall of each locating strip (3), a plurality of adjacent two arc plates (4) are in a group, a plurality of groups of arc grooves (10) are formed in one side wall of each arc plate (4), a mounting plate (9) is arranged on one side wall of each arc groove (10), a plurality of two groups of mounting plates (9) are opposite, a fixing rod (7) is fixedly connected between each mounting plate (9), and a plurality of balls (8) are sleeved on the outer wall of each fixing rod (7);

threaded rods (5) are arranged between the mounting plates (9) in a penetrating mode, and nuts (6) are sleeved on two sides of the outer walls of the threaded rods (5) in a threaded mode.

2. The drill pipe resilient centralizer for a well tool of claim 1, wherein: the nuts (6) are all propped against one side wall of the mounting plate (9) when in a working state.

3. The drill pipe resilient centralizer for a well tool of claim 1, wherein: two fixing plates (11) are fixedly arranged on one side wall of each positioning strip (3), and a plurality of screws (12) are connected with one side wall of each fixing plate (11) in a threaded mode.

4. The drill pipe resilient centralizer for a well tool of claim 1, wherein: the balls (8) extend out of the arc-shaped plate (4).

5. The drill pipe resilient centralizer for a well tool of claim 1, wherein: a plurality of threaded rods (5) do not interfere with the balls (8).

6. The drill pipe resilient centralizer for a well tool of claim 1, wherein: the upper end cover (1) and the lower end cover (2) are the same in size.