CN217233435U

CN217233435U - Diameter-variable centralizer

Info

Publication number: CN217233435U
Application number: CN202220387417.8U
Authority: CN
Inventors: 方涛; 姜宏元; 杨立营
Original assignee: Rock Tianjin Oilfield Technology Service Co ltd
Current assignee: Rock Tianjin Oilfield Technology Service Co ltd
Priority date: 2022-02-24
Filing date: 2022-02-24
Publication date: 2022-08-19
Anticipated expiration: 2032-02-24

Abstract

The utility model discloses a variable diameter centralizer, in particular to the technical field of centralizer, comprising a variable diameter centralizer component, wherein the variable diameter centralizer component comprises a mandrel, an upper anti-collision sleeve is installed on the upper part of the mandrel through threads, a lower anti-collision sleeve is arranged on the lower part of the mandrel, two semicircular bearings are arranged on one side of the outer wall of the mandrel close to the upper anti-collision sleeve, two lower semicircular bearings are arranged on one side of the outer wall of the mandrel close to the lower anti-collision sleeve, two upper semicircular bearings and two outer wall fixing sleeves of the lower semicircular bearings are provided with a centralizing sleeve, a plurality of centralizing ribbed plates are arranged on the outer side of the centralizing sleeve, the centralizer component is convenient for centralizing sleeves with different inner diameters, so that a downhole cutting tool connected with the lower part is in the optimal working state of the center, thereby prolonging the service lives of blades, cutter blocks and the like on the downhole cutting tool, the operations of cutting, forging and milling, grinding and milling, sleeve milling and the like are rapidly completed.

Description

Diameter-variable centralizer

Technical Field

The utility model relates to a centralizer technical field specifically is variable footpath centralizer.

Background

In the well repairing and fishing operation of petroleum development, underground cutting, windowing forging and milling and fish polishing need to centralize a lower construction tool, otherwise, a cutting blade and a cutter block on the tool are easily worn and failed quickly, and operation failure is seriously caused;

when the centralizer works in a casing pipe with the same size, because the outer diameter of the traditional centralizer can not be changed after being designed and manufactured, after a tool group is constructed, the outer diameter of the centralizer can be worn, the gap between the centralizer and the casing pipe is enlarged, and the centralizer is connected to the tool group again, so that the centralizing effect is not good in the last operation;

and traditional centralizer is in the casing pipe salvage operation of coping different internal diameters, and a fixed knot constructs traditional centralizer can only cooperate a kind of sleeve pipe, can't satisfy its operation requirement after sheathed tube internal diameter size and wall thickness change, can only carry out the processing and the manufacturing of whole instrument according to sheathed tube size and wall thickness, and it is not convenient enough to use, for this reason, we propose a but reducing centralizer and be used for solving above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a but reducing centralizer to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: but reducing centralizer, including variable diameter centralizer subassembly, but reducing centralizer subassembly includes the dabber, the anticollision cover is installed to the upper portion screw thread of dabber, the lower part of dabber is equipped with down the anticollision cover, the dabber outer wall is close to one side of going up the anticollision cover and is equipped with two semicircle bearings, the dabber outer wall is close to down one side of anticollision cover and is equipped with two semicircle bearings down, two last semicircle bearing and two the fixed cover of outer wall of semicircle bearing is equipped with the cover of righting down, the outside of righting the cover is equipped with a plurality of floors of righting, the outer wall screw thread card of righting the cover is equipped with the oiling bolt.

As a preferred technical scheme of the utility model, right a side end and the last anticollision cover contact that the cover is close to last semicircular bearing, right a side end and the lower anticollision cover contact that the cover is close to lower semicircular bearing.

As a preferred technical scheme of the utility model, the outer wall of righting the cover is seted up and is right the groove that the floor cooperation was used, the groove is equipped with and is a plurality of that the ring array distributes, right floor activity joint in the corresponding righting floor.

As a preferred technical scheme of the utility model, set up the outer wall screw thread of cover and install the fixing bolt who corresponds with righting the floor, the fixing bolt screw thread is pegged graft and is close to one side of righting the cover at righting the floor.

As an optimal technical scheme of the utility model, spacing jackscrew is installed to the outer wall screw thread of lower anticollision cover, the tip screw thread joint of spacing jackscrew is in the dabber.

As a preferred technical scheme of the utility model, the dabber is close to the one end middle part of last anticollision cover and has been seted up the thread groove, the dabber is close to the one end middle part integrated into one piece of lower anticollision cover and has the screw thread protruding.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. by arranging the variable-diameter centralizer component, centralization on casings with different inner diameters is facilitated, and the underground cutting tool connected with the lower part is in the optimal working state of the center, so that the service life of blades, cutter blocks and the like on the underground cutting tool is prolonged, and operations such as cutting, forging and milling, sleeve milling and the like are rapidly completed;

2. set up spacing jackscrew and carry out down the spacing fixed between crashproof cover, the dabber, convenient follow-up dismantlement of crashproof cover down, and then the dismantlement between convenient cover and the dabber of righting is overhauld to the result of use of whole variable diameter centralizer has been promoted.

Drawings

FIG. 1 is a schematic view of the structure of the present invention,

FIG. 2 is a schematic view of the structural connection between the centering sleeve and the centering rib plate of the present invention,

fig. 3 is a schematic view of the structure connection during operation of the present invention.

In the figure: 1. a mandrel; 101. a thread groove; 102. the thread is convex; 2. an anti-collision sleeve is arranged; 3. an upper semicircular bearing; 4. a centralizing sleeve; 41. a groove; 5. oiling bolts; 6. righting the rib plate; 7. a lower semicircular bearing; 8. a lower anti-collision sleeve; 9. limiting jackscrews; 10. fixing the bolt; 11. drilling a rod; 12. a variable diameter centralizer assembly; 13. a sleeve; 14. a downhole cutting tool.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The embodiment is as follows: as shown in fig. 1-3, the utility model provides a variable-diameter centralizer, including a variable-diameter centralizer assembly 12, the variable-diameter centralizer assembly 12 includes a mandrel 1, a thread groove 101 is provided in the middle of one end of the mandrel 1 near the upper anti-collision sleeve 2, and when in use, the mandrel 1 is in threaded installation with a drill rod 11 by providing the thread groove 101, a thread protrusion 102 is integrally formed in the middle of one end of the mandrel 1 near the lower anti-collision sleeve 8, and when in use, the mandrel is connected with a downhole cutting tool 14 by providing the thread protrusion 102;

the upper part of the mandrel 1 is provided with an upper anti-collision sleeve 2 through threads, the lower part of the mandrel 1 is provided with a lower anti-collision sleeve 8, one side of the outer wall of the mandrel 1, which is close to the upper anti-collision sleeve 2, is provided with two upper semicircular bearings 3, one side of the outer wall of the mandrel 1, which is close to the lower anti-collision sleeve 8, is provided with two lower semicircular bearings 7, the outer walls of the two upper semicircular bearings 3 and the two lower semicircular bearings 7 are fixedly sleeved with a centering sleeve 4, the centering sleeve 4 can rotate on the outer side of the mandrel 1 through the arrangement of the two upper semicircular bearings 3 and the two lower semicircular bearings 7, the outer side of the centering sleeve 4 is provided with a plurality of centering rib plates 6, wherein the end parts of the upper anti-collision sleeve 2, the lower anti-collision sleeve 8 and the centering rib plates 6 are provided with larger oblique angles, so that a variable-diameter centering device assembly 12 can smoothly enter a sleeve 13 from a well mouth, the outer wall thread of the centering sleeve 4 is blocked and provided with an oiling bolt 5, by arranging the oiling bolt 5 and screwing and disassembling the oiling bolt 5 by using a tool, lubricating grease can be injected into the centering sleeve 4, so that the centering sleeve 4 rotates on the outer side of the mandrel 1.

Righting cover 4 and last anti-collision sleeve 2 contact near a side end of last semicircular bearing 3, righting cover 4 and being close to a side end of lower semicircular bearing 7 and lower anti-collision sleeve 8 contact, carrying out spacing protection to righting cover 4 through setting up anti-collision sleeve 2, lower anti-collision sleeve 8, preventing to right that 4 tip of cover is impaired and right cover 4 takes place the displacement to whole variable diameter centralizer's result of use has been promoted.

The outer wall of the righting sleeve 4 is provided with a plurality of grooves 41 matched with the righting rib plates 6 for use, the grooves 41 are distributed in an annular array, the righting rib plates 6 are movably clamped in the corresponding righting rib plates 6, and the righting rib plates 6 and the righting sleeve 4 are clamped, so that the righting rib plates 6 can be conveniently and quickly mounted, dismounted and replaced; the outer wall thread of the righting sleeve 4 is provided with a fixing bolt 10 corresponding to the righting rib plate 6, the fixing bolt 10 is inserted in one side, close to the righting sleeve 4, of the righting rib plate 6 in a threaded manner, fixing between the righting rib plate 6 and the righting sleeve 4 is carried out, and therefore the mounting stability of the righting rib plate 6 is improved.

Spacing jackscrew 9 is installed to the outer wall screw thread of lower anticollision cover 8, the tip screw thread joint of spacing jackscrew 9 is in dabber 1, and is carried out down spacing fixed between anticollision cover 8, the dabber 1 through setting up spacing jackscrew 9, and the dismantlement of anticollision cover 8 is conveniently followed and carried out down, and then conveniently rights the dismantlement between cover 4 and the dabber 1 and overhauls to the result of use of whole variable diameter centralizer has been promoted.

The working principle is as follows: when in use, the mandrel 1 is installed in a threaded manner through the threaded groove 101 and the drill rod 11 and is connected with the underground cutting tool 14 through the threaded protrusion 102, then the whole tool set smoothly enters the casing 13 from the wellhead, the plurality of righting ribs 6 cling to the inner wall of the casing 13 until the whole tool set reaches a specified position, the tool set is positioned at the central position of the casing 13, at the moment, the underground cutting tool 14 connected at the lower part is in an optimal working state,

then, the drill rod 11 is rotated at the wellhead, the mandrel 1 of the variable-diameter centralizer assembly 12 rotates in the centralizing sleeve 4, the underground cutting tool 14 is synchronously driven to rotate, and the underground cutting tool 14 is in the optimal working state of the center, so that the service lives of blades, cutter blocks and the like on the underground cutting tool 14 are prolonged, and the operations of cutting, forging and milling, sleeve milling and the like are rapidly completed;

when the casings 13 with different inner diameters need to be righted, the fixing bolt 10 on each righting ribbed plate 6 is detached by using a tool, and the righting ribbed plates 6 are taken down; cleaning dirt in the groove 41, installing a righting ribbed plate 6 suitable for the operation inner diameter of the casing 13 at this time, and fastening by using a fixing bolt 10; subsequently, the oiling bolt 5 is removed, grease is injected between the centering sleeve 4 and the mandrel 1 so that the mandrel 1 rotates in the centering sleeve 4, and the oiling bolt 5 is installed.

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 alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. But reducing centralizer is including variable footpath centralizer subassembly (12), its characterized in that: but reducing centralizer subassembly (12) include dabber (1), anticollision cover (2) are installed to the upper portion screw thread of dabber (1), the lower part of dabber (1) is equipped with down anticollision cover (8), one side that dabber (1) outer wall is close to last anticollision cover (2) is equipped with two semicircle bearings (3), one side that dabber (1) outer wall is close to down anticollision cover (8) is equipped with two semicircle bearings (7) down, two last semicircle bearing (3) and two the outer wall fixed cover of semicircle bearing (7) is equipped with and rights cover (4) down, the outside of righting cover (4) is equipped with a plurality of rib boards of righting (6), the outer wall screw thread card of righting cover (4) is equipped with oiling bolt (5).

2. The variable diameter centralizer of claim 1, wherein: the end part of one side of the centering sleeve (4) close to the upper semicircular bearing (3) is contacted with the upper anti-collision sleeve (2), and the end part of one side of the centering sleeve (4) close to the lower semicircular bearing (7) is contacted with the lower anti-collision sleeve (8).

3. The variable diameter centralizer of claim 1, wherein: the outer wall of the righting sleeve (4) is provided with a plurality of grooves (41) matched with the righting rib plates (6) for use, the grooves (41) are distributed in an annular array, and the righting rib plates (6) are movably clamped in the corresponding righting rib plates (6).

4. The variable diameter centralizer of claim 1, wherein: the outer wall thread of the righting sleeve (4) is provided with a fixing bolt (10) corresponding to the righting rib plate (6), and the fixing bolt (10) is inserted in one side, close to the righting sleeve (4), of the righting rib plate (6) in a threaded manner.

5. The variable diameter centralizer of claim 1, wherein: the outer wall screw thread of lower anticollision cover (8) is installed spacing jackscrew (9), the tip screw thread joint of spacing jackscrew (9) is in dabber (1).

6. The variable diameter centralizer of claim 1, wherein: the anti-collision device is characterized in that a thread groove (101) is formed in the middle of one end, close to the upper anti-collision sleeve (2), of the mandrel (1), and a thread protrusion (102) is integrally formed in the middle of one end, close to the lower anti-collision sleeve (8), of the mandrel (1).