CN219081511U

CN219081511U - Anti-toppling centralizer

Info

Publication number: CN219081511U
Application number: CN202223296384.5U
Authority: CN
Inventors: 陈洪飞
Original assignee: Chengdu Dingcheng Yufei Energy Technology Co ltd
Current assignee: Chengdu Dingcheng Yufei Energy Technology Co ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-05-26
Anticipated expiration: 2032-12-08

Abstract

The utility model relates to the technical field of centralizers, and discloses an anti-toppling centralizer, which comprises a casing string, a front lantern ring and a rear lantern ring, wherein the casing string is inserted into the front lantern ring and the rear lantern ring, limiting parts are arranged on the opposite outer sides of the front lantern ring and the rear lantern ring, clamping grooves are formed in the two sides of the front lantern ring, an electric telescopic rod is fixedly arranged in the clamping grooves of the front lantern ring, and a supporting part is arranged between the front lantern ring and the rear lantern ring; the electric telescopic rod drives the sliding ring to slide, and the upper rotating rod is driven to extrude the abutting plate, so that the sliding ring and the lower rotating rod are upwards jacked up by the abutting plate, further the gasket and the inner wall of the shaft are abutted, the centralizer is positioned at the center of the shaft, meanwhile, the friction force between the gasket and the inner wall of the shaft is improved through the hole groove, the centralizer is further stable, and the outer diameter of the centralizer cannot be increased due to the fact that the abutting plate is not jacked up, so that the effects of being applicable to different calibers and improving practicability are achieved.

Description

Anti-toppling centralizer

Technical Field

The utility model relates to the technical field of centralizers, in particular to an anti-toppling centralizer.

Background

Centralizers are used for casing centralizing of various special wellbores successfully along with the continuous development of technology, are various in forms and safer and more reliable to use, and are installed on the outer surface of a casing in order to ensure that a cast-in casing string is centered in a well bore in oil and gas drilling.

The utility model discloses a centralizer of preventing empting of chinese patent of publication No. CN216841490U, including left ring, first side piece is detachably installed to one side of left ring, first screw has been seted up in the centre of first side piece, and there is the bolt in the centre of first side piece through first screw detachably installed, and the second side piece is detachably installed to one side of first side piece, and the second screw has been seted up in the centre of second side piece, and the right ring is detachably installed to one side of second side piece, and one side of bolt is through second screw detachably installed the nut, and compression device is detachably installed to the bottom of left ring. In the above-mentioned scheme, prevent empting centralizer through closing device's setting, again put into the round hole of overlap piece with the casing string in the back, use first telescopic link and second telescopic link to compress tightly the casing string, prevent casing string and overlap the piece and take place to drop and slope, avoided because the casing string takes place to empty easily after throwing into the device, lead to follow-up needs to take out again and carry out the position correction, the problem that influences production efficiency relatively.

In carrying out the present application, the inventors have found that at least the following problems exist in this technology: because the centralizer in this scheme passes through the bolt with two sets of rings butt joint, and the fixed center casing string of rethread closing device, and the telescopic link of bolt and closing device all outwards disburses, so can lead to this centralizer peripheral radius great, and then is inapplicable to the pit shaft that the bore is little, and application scope has the limitation, consequently, can do further improvement.

Disclosure of Invention

In order to achieve the purpose of being applicable to different calibers and improving practicality, the utility model provides the following technical scheme: the utility model provides a centralizer of preventing empting, includes casing string, preceding lantern ring and back lantern ring, the casing string is pegged graft in the inside of preceding lantern ring and back lantern ring, the outside that preceding lantern ring and back lantern ring are relative is provided with spacing part, the draw-in groove has been seted up to the both sides of preceding lantern ring, the inside fixed mounting that preceding lantern ring is located the draw-in groove has electric telescopic handle, be provided with supporting part between preceding lantern ring and the back lantern ring.

As optimization, the limiting component comprises a fixed ring fixedly arranged on the outer sides of the front lantern ring and the rear lantern ring, a sliding groove is formed in the fixed ring, an elastic spring is fixedly arranged in the sliding groove, and a clamping plate is fixedly arranged at the other end of the elastic spring.

As optimization, the supporting part is including the slip ring of cover at casing string middle part outside, the bottom side rotation of slip ring is connected with the bull stick, the other end rotation of going up the bull stick is connected with the butt board, the other end rotation of butt board is connected with down the bull stick.

As the optimization, four groups of spouts are set up in the retainer ring is inside to be circumference array, spring is provided with two groups in the inside of spout, splint sliding connection is inside the spout, just splint material is elastic rubber material, gives splint to the thrust at retainer ring center all the time through spring, and then can insert the casing string at retainer ring central point after, drives splint extrusion clamp and is located the casing string at center through spring.

As the optimization, slip ring fixed mounting is at the flexible end in bottom of electric telescopic handle, just go up the bull stick and be provided with four around slip ring array, drive the slip ring through electric telescopic handle is flexible and slide along the casing string.

As optimization, the other end of the lower rotating rod is rotationally connected to the top side of the rear sleeve ring, four lower rotating rods are correspondingly arranged on the upper rotating rod, the upper rotating rod and the lower rotating rod are driven to deflect upwards through sliding of the sliding ring, and then the abutting plate is jacked upwards.

As the optimization, the positive one side fixed mounting of butt board has the gasket, the hole groove has been seted up openly to the gasket, just the gasket material is rubber, can make gasket butt pit shaft inner wall by the jack-up through the butt board, and the frictional force of gasket and pit shaft inner wall is further improved in the seting up of rethread hole groove for the centralizer is more stable.

The beneficial effects of the utility model are as follows:

1. this prevent centralizer that emptys, when inserting preceding lantern ring and back lantern ring through the casing string, can extrude splint to slide to the spout is inside, so can extrude compression spring and store elastic potential energy, and give splint reverse thrust all the time through the spring, and then can drive splint extrusion to the casing string at solid fixed ring center to can play the spacing fixed action of extrusion to the casing string through four sets of splint.

2. This prevent centralizer of empting drives the slip ring through electric telescopic handle and slides, can drive bull stick extrusion butt board, so can make slip ring and lower bull stick upwards jack-up the butt board, and then make gasket and pit shaft inner wall butt for the centralizer is located the pit shaft positive center, improves the frictional force of gasket and pit shaft inner wall through the hole groove simultaneously, and then makes the centralizer more stable, and because the butt board is not by the jack-up time, can not increase the external diameter of centralizer moreover, thereby reach the effect that is suitable for different bore, improvement practicality.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of a front cut-away view of a spacing member of the present utility model;

FIG. 3 is a schematic top view of the structure of the present utility model;

fig. 4 is an enlarged schematic view of a partial structure at a in fig. 3 according to the present utility model.

In the figure: 1. a casing string; 2. a front collar; 3. a rear collar; 4. a limiting member; 41. a fixing ring; 42. a chute; 43. an elastic spring; 44. a clamping plate; 5. a clamping groove; 6. an electric telescopic rod; 7. a support member; 71. a slip ring; 72. an upper rotating rod; 73. an abutting plate; 731. a gasket; 732. a hole groove; 74. and a lower rotating rod.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

Please refer to fig. 1, a toppling-proof centralizer, including casing string 1, preceding lantern ring 2 and back lantern ring 3, casing string 1 peg graft in the inside of preceding lantern ring 2 and back lantern ring 3, and preceding lantern ring 2 is provided with stop part 4 with the outside that the lantern ring 3 is relative, and draw-in groove 5 has been seted up to the both sides of preceding lantern ring 2, and preceding lantern ring 2 is located the inside fixed mounting of draw-in groove 5 and has electric telescopic handle 6, is provided with supporting part 7 between preceding lantern ring 2 and the back lantern ring 3.

Referring to fig. 2, the limiting member 4 includes a fixed ring 41 fixedly mounted on opposite outer sides of the front collar 2 and the rear collar 3, a sliding groove 42 is formed in the fixed ring 41, four groups of sliding grooves 42 are formed in the fixed ring 41 in a circumferential array, elastic springs 43 are fixedly mounted in the sliding groove 42, two groups of elastic springs 43 are arranged in the sliding groove 42, a clamping plate 44 is fixedly mounted at the other end of the elastic springs 43, the clamping plate 44 is slidably connected in the sliding groove 42, the clamping plate 44 is made of elastic rubber, the clamping plate 44 always pushes the center of the fixed ring 41 through the elastic springs 43, and then after a casing string 1 is inserted into the center point of the fixed ring 41, the clamping plate 44 is driven to squeeze and clamp the casing string 1 located in the center through the elastic springs 43.

Referring to fig. 3-4, the supporting member 7 includes a sliding ring 71 sleeved on the outer side of the middle of the casing string 1, the sliding ring 71 is fixedly installed at the bottom telescopic end of the electric telescopic rod 6, the bottom side of the sliding ring 71 is rotatably connected with four upper rotating rods 72, the four upper rotating rods 72 are arranged around the sliding ring 71 in an array, and the sliding ring 71 is driven to slide along the casing string 1 by the telescopic action of the electric telescopic rod 6; the other end of going up bull stick 72 rotates and is connected with butt board 73, and the other end of butt board 73 rotates and is connected with down bull stick 74, and the other end of bull stick 74 rotates and is connected in the topside of back lantern ring 3, and down bull stick 74 is provided with four corresponding bull stick 72, slides through slip ring 71 and can drive up bull stick 72 and bull stick 74 and deflect down, and then can jack up butt board 73 upwards.

Referring to fig. 3-4, a spacer 731 is fixedly installed on one side of the front surface of the abutment plate 73, a hole slot 732 is formed in the front surface of the spacer 731, and the spacer 731 is made of rubber, so that the spacer 731 abuts against the inner wall of the shaft when the abutment plate 73 is jacked up, and the friction force between the spacer 731 and the inner wall of the shaft is further improved through the hole slot 732, so that the centralizer is more stable.

When in use, referring to fig. 1-4, firstly, the casing string 1 is inserted into the front collar 2 and the rear collar 3, and the clamping plates 44 are pressed and slide towards the inside of the sliding groove 42, so that the elastic spring 43 is extruded, and then the elastic spring 43 is compressed and accumulated with elastic potential energy, and further the clamping plates 44 are always given a reverse thrust force, so that the clamping plates 44 are driven to extrude the casing string 1 positioned at the center of the fixed ring 41, and the casing string 1 is extruded, limited and fixed by the four groups of clamping plates 44;

afterwards, by starting the electric telescopic rod 6, the sliding ring 71 is driven to slide along the casing string 1, so that the upper rotating rod 72 is driven to extrude the abutting plate 73, the sliding ring 71 and the lower rotating rod 74 are enabled to deflect upwards, the abutting plate 73 is further enabled to jack up upwards, the gasket 731 is enabled to abut against the inner wall of the shaft, meanwhile, the friction force between the gasket 731 and the inner wall of the shaft can be increased through the hole groove 732, and the centralizer is enabled to be located in the center of the shaft and is more stable.

In summary, when the casing string 1 is inserted into the front collar 2 and the rear collar 3, the clamping plates 44 are pushed to slide into the sliding grooves 42, so that the compression elastic springs 43 are pushed to store elastic potential energy, and the clamping plates 44 are always pushed in the reverse direction by the elastic springs 43, so that the clamping plates 44 are driven to push the casing string 1 to the center of the fixing ring 41, and the casing string 1 can be limited and fixed by the four groups of clamping plates 44.

The sliding ring 71 is driven to slide through the electric telescopic rod 6, the upper rotating rod 72 is driven to extrude the abutting plate 73, so that the sliding ring 71 and the lower rotating rod 74 are enabled to jack up the abutting plate 73 upwards, further the gasket 731 is enabled to be abutted against the inner wall of the shaft, the centralizer is located at the center of the shaft, meanwhile, the friction force between the gasket 731 and the inner wall of the shaft is improved through the hole groove 732, the centralizer is enabled to be more stable, and the outer diameter of the centralizer cannot be increased due to the fact that the abutting plate 73 is not jacked up, so that the effects of being applicable to different calibers and improving practicality are achieved.

Claims

1. Anti-toppling centralizer, including casing string (1), preceding lantern ring (2) and back lantern ring (3), its characterized in that: casing string (1) peg graft in the inside of preceding lantern ring (2) and back lantern ring (3), the outside that preceding lantern ring (2) and back lantern ring (3) are relative is provided with spacing part (4), draw-in groove (5) have been seted up to the both sides of preceding lantern ring (2), preceding lantern ring (2) are located the inside fixed mounting of draw-in groove (5) and have electric telescopic handle (6), be provided with supporting part (7) between preceding lantern ring (2) and the back lantern ring (3).

2. The anti-toppling centralizer according to claim 1, wherein: the limiting component (4) comprises a fixed ring (41) fixedly arranged on the outer sides of the front lantern ring (2) and the rear lantern ring (3), a sliding groove (42) is formed in the fixed ring (41), an elastic spring (43) is fixedly arranged in the sliding groove (42), and a clamping plate (44) is fixedly arranged at the other end of the elastic spring (43).

3. The anti-toppling centralizer according to claim 1, wherein: the supporting component (7) comprises a sliding ring (71) sleeved on the outer side of the middle of the casing string (1), an upper rotating rod (72) is rotatably connected to the bottom side of the sliding ring (71), an abutting plate (73) is rotatably connected to the other end of the upper rotating rod (72), and a lower rotating rod (74) is rotatably connected to the other end of the abutting plate (73).

4. The anti-toppling centralizer according to claim 2, wherein: the sliding groove (42) is formed by arranging four groups in the fixed ring (41) in a circumferential array mode, two groups of elastic springs (43) are arranged in the sliding groove (42), the clamping plates (44) are slidably connected in the sliding groove (42), and the clamping plates (44) are made of elastic rubber materials.

5. A toppling prevention centralizer according to claim 3, wherein: the sliding rings (71) are fixedly arranged at the bottom telescopic ends of the electric telescopic rods (6), and four upper rotating rods (72) are arranged around the sliding rings (71) in an array.

6. A toppling prevention centralizer according to claim 3, wherein: the other end of the lower rotating rod (74) is rotatably connected to the top side of the rear sleeve ring (3), and four lower rotating rods (74) are arranged corresponding to the upper rotating rods (72).

7. A toppling prevention centralizer according to claim 3, wherein: a gasket (731) is fixedly arranged on one side of the front face of the abutting plate (73), a hole groove (732) is formed in the front face of the gasket (731), and the gasket (731) is made of rubber.