CN203452689U

CN203452689U - Centering device for well drilling pipes

Info

Publication number: CN203452689U
Application number: CN201320536830.7U
Authority: CN
Inventors: 冯影川; 魏双会
Original assignee: Sichuan Honghua Petroleum Equipment Co Ltd
Current assignee: Sichuan Honghua Petroleum Equipment Co Ltd
Priority date: 2013-08-31
Filing date: 2013-08-31
Publication date: 2014-02-26
Anticipated expiration: 2023-08-31

Abstract

The utility model discloses a centering device for well drilling pipes. The centering device comprises a support, a rotating ring which can rotate and is arranged on the support, three arc-shaped centering arms and two driving hydraulic cylinders. One ends of the arc-shaped centering arms are respectively connected with the support in a rotating mode through respective centering arm hinge pins, the centering arm hinge pins of the three arc-shaped centering arms are uniformly distributed along the inner ring of the rotating ring, and the three arc-shaped centering arms are arranged in a staggered mode in the vertical direction. One ends, close to the centering arm hinge pins, of the three arc-shaped centering arms are connected with the rotating ring through respective connection rods, and the three connection points are hinged. The distances from the hinged points of the three connection rods and the rotating ring to the centering arm hinge pins of the arc-shaped centering arms connected with the corresponding connection rods are the same. The two driving hydraulic cylinders are arranged outside the outer ring of the rotating ring, the cylinder body ends of the two driving hydraulic cylinders are respectively hinged to the support, and the piston ends of the two driving hydraulic cylinders are respectively hinged to the outer ring of the rotating ring. The centering device can locate the pipes accurately.

Description

Drilling well pipe centralising device

Technical field

The utility model relates to the pipe treating apparatus in oil drilling and r eoovery machine equipment, relates in particular to the centralising device of pipe for a kind of drilling well.

Background technology

The pipes such as drilling rod, drill collar, sleeve pipe are pipes indispensable in oil drilling operation.Wherein drilling rod and drill collar are all to use in drilling well eye; Sleeve pipe is to use when Reinforcing Shaft.In order to improve the efficiency of drillng operation, conventionally all need in advance many drilling rods, drill collar or sleeve pipe to be coupled together respectively (be about to them and connect into thribble), leave on hay rake.

In connecing the process of thribble operation, two pipes that are only connected are aimed at fast and accurately, could complete smoothly the operation that connects thribble.This just needs special pipe righting, alignment device that the pipe being connected is aimed at.

Existing drilling well pipe centralising device is as shown in Fig. 1 or Fig. 2: this drilling well pipe centralising device mainly comprises that support 01, axial symmetry are distributed in left aligning arm 02 and right aligning arm 03, the left driving fluid cylinder 04 that drives respectively left aligning arm 02 and right aligning arm 03 and the right driving fluid cylinder 05 on support 01, and described left aligning arm 02 and right the aligning arm 03 respectively connecting rod by are separately connected with right driving fluid cylinder 05 with left driving fluid cylinder 04.The operating principle of this drilling well pipe is: during centering, pipe (not shown in FIG.) is set in the cavity of left aligning

arm

02 and 03 formation of right aligning arm, two

drive fluid cylinder

04,05 to drive respectively left aligning arm 02 and right aligning arm 03 inward collapsible simultaneously, thereby realize the righting of pipe and centering location.Yet in actual use procedure, we find that the drilling well pipe centralising device of prior art exists following shortcoming:

(1) owing to adopting left driving fluid cylinder 04 and right driving fluid cylinder 05 to drive respectively left aligning

arm

02 and 03, two of right aligning arm to drive

fluid cylinder

04,05 in driving process, always there is a time difference, can not reach synchronous completely.It causes left aligning arm 02 and right aligning arm 03 also asynchronous in the process of inward collapsible, thereby causes the location of pipe not accurate enough, and the efficiency that connects thribble is low.Also may cause pipe not connect, come off, cause the accident.

(2) because all aligning arms of existing centralising device are to be all directly directly connected with driving fluid cylinder by connecting rod, cause the size of connecting rod larger, left driving fluid cylinder 04 and right driving fluid cylinder 05 are also symmetrical along support axial distribution, cause the structure of whole centralising device also more complicated, volume is large, and the general arrangement of the rig of using to drilling well has also brought a lot of difficulties.

Utility model content

In order to solve the problems of the prior art, the purpose of this utility model is to provide a kind of simple in structure, net synchronization capability good, the centering degree of accuracy is high drilling well pipe centralising device.

For achieving the above object, the utility model is by the following technical solutions: a kind of drilling well pipe centralising device, comprise support, be arranged on rotatingly on support turn-take, three arc aligning arms, two drive fluid cylinders, described three arc aligning arm one end respectively aligning arm bearing pin and the support by are separately rotationally connected, and the aligning arm bearing pin of three arc aligning arms is uniform along the inner ring of turn-taking, three arc aligning arm in the vertical directions shift to install simultaneously; Described three arc aligning arms near one end of aligning arm bearing pin also respectively the connecting rod by be separately connected with turn-taking, and each tie point is hinged; The distance of the aligning arm bearing pin of the arc aligning arm that described three connecting rods are connected to respective link with the pin joint of turn-taking respectively equates; Described two drive fluid cylinder to be positioned at outside the outer ring of turn-taking, and the cylinder body end of two driving fluid cylinders is hinged with support respectively, and two drive the piston end of fluid cylinders hinged with the outer ring of turn-taking respectively.

Adopt above structure, utilize two to drive fluid cylinder to drive the rotation of turn-taking, turn-take and drive respectively three arc aligning arms to rotate by three connecting rods, thereby realize the inward collapsible of three arc aligning arms or outwards open.Because being utilizes to drive fluid cylinder first to drive the rotation of turn-taking, turn-take and by connected three connecting rods are synchronous, drive the gathering of three arc aligning arms or open again.Whole driving process is through unified the sending of turn-taking, so motion uniformity, the net synchronization capability of three arc aligning arms are good, avoided left and right aligning arm of the prior art by different driving fluid cylinder, to be driven the shortcoming that aligning arm motion uniformity is bad, pipe centring property is poor causing, the utility model is in to the process of drilling well pipe centering, and the centring property of drilling well pipe is good, pipe accurate positioning while connecing thribble.

Preferred version is, described outer ring of turn-taking is also provided with four positioning rollers of turn-taking, described four positioning rollers of turn-taking are rotated and are arranged on support by positioning roller bearing pin, and described four positioning rollers of turn-taking are uniform along the outer ring of turn-taking, and offset with the outer ring of turn-taking simultaneously.Adopt this structure, what can prevent from turn-taking rocks, and realizes arc aligning arm more accurate to the centering of pipe.

Further preferred version, described two drive fluid cylinders for be arrangeding in parallel, and driving fluid cylinder and the axial angle β of support are that 27 degree are to 29 degree.Preferred angle β is 28.4 degree.Driving fluid cylinder is oblique layout with respect to support, and is parallel to each other, and therefore can not produce eccentric phenomena.Simultaneously such layout conserve space, whole mechanism structure is compact.In preferred angular range, drive fluid cylinder flexible movements simultaneously, avoided occurring stuck phenomenon.

In sum, drilling well pipe centralising device of the present utility model, adopt two driving fluid cylinders of arranging that are parallel to each other first to drive the rotation of turn-taking, by turn-taking, drive three arc aligning arms synchronously pipe to be carried out to centering again, belonging to mechanical synchronization drives, the synchronism of centering and uniformity are all good, the accurate positioning to pipe.

Accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, further describe the utility model:

Fig. 1 is the perspective view of existing drilling well pipe centralising device;

Fig. 2 is the plan structure schematic diagram of Fig. 1;

Fig. 3 is the perspective view of the utility model drilling well pipe centralising device;

Fig. 4 is the plan structure schematic diagram of Fig. 3;

Fig. 5 is the schematic top plan view of the aligning arm of the utility model drilling well pipe centralising device while opening.

The specific embodiment

As shown in one of Fig. 3 to Fig. 5, a kind of drilling well pipe of the utility model centralising device, comprise support 1, be arranged on rotating 2, three the arc aligning arms 3 of turn-taking on support 1, two drive fluid cylinder 4, described three the arc aligning arm 3 one end respectively aligning arm bearing pin by separately 31 are rotationally connected with support 1, and the aligning arm bearing pin 31 of three arc aligning arms 3 is uniform along 2 the inner ring of turn-taking, three arc aligning arm 3 in the vertical directions shift to install simultaneously; Described three arc aligning arms 3 near one end of aligning arm bearing pin 31 also respectively the connecting rod 32 by separately 2 be connected with turn-taking, and each tie point is hinged; Described three connecting rods 32 are identical with the pin joint position of three arc aligning arms 3 respectively, and the distance of the aligning arm bearing pin 31 of the arc aligning arm 3 that is connected to respective link 32 with 2 the pin joint of turn-taking respectively of three connecting rods 32 equates; Described two drive fluid cylinders 4 to be positioned to turn-take outside 2 outer ring, and two drive the cylinder body end of fluid cylinders 4 hinged with support 1 respectively, and two piston ends that drive fluid cylinders 4 are hinged with 2 the outer ring of turn-taking respectively.Described two drive fluid cylinders 4 for be arrangeding in parallel, and to drive fluid cylinder 4 and the axial angle β of support 1 be 28.4 degree.Certain described angle β also can be for 27 degree be to an angle arbitrarily between 29 degree.Driving fluid cylinder 4 is oblique layout with respect to support 1, and is parallel to each other, and therefore can not produce eccentric phenomena.Simultaneously such layout conserve space, whole mechanism structure is compact.In preferred angular range, drive fluid cylinder 4 flexible movements simultaneously, avoided occurring stuck phenomenon.Described 2 the outer ring of turn-taking is also provided with four positioning rollers 5 of turn-taking, and described four positioning rollers 5 of turn-taking are rotated and are arranged on support 1 by positioning roller bearing pin, and described four positioning rollers 5 of turn-taking are uniform along 2 the outer ring of turn-taking, and offsets with 2 the outer ring of turn-taking simultaneously.Adopt this structure, 2 rock of can preventing from turn-taking, the centering of realizing 3 pairs of pipes of arc aligning arm (not shown in FIG.) is more accurate.

Claims

1. a drilling well pipe centralising device, it is characterized in that: it comprises support (1), is arranged on support (1) above rotating turn-taking (2), three arc aligning arms (3), two driving fluid cylinders (4), described three arc aligning arms (3) one end respectively aligning arm bearing pin (31) by is separately rotationally connected with support (2), and the aligning arm bearing pin (31) of three arc aligning arms (3) is uniform along the inner ring of turn-take (2), three arc aligning arms (3) in the vertical direction shifts to install simultaneously; Described three arc aligning arms (3) near one end of aligning arm bearing pin (31) also respectively the connecting rod (32) by be separately connected with turn-take (2), and each tie point is hinged; The distance of the aligning arm bearing pin (31) of the arc aligning arm (3) that described three connecting rods (32) are connected to respective link (32) with the pin joint of turn-take (2) respectively equates; Described two drive fluid cylinder (4) to be positioned at outside the outer ring of turn-take (2), and the cylinder body end of two driving fluid cylinders (4) is hinged with support (2) respectively, and two drive the piston end of fluid cylinders (4) hinged with the outer ring of turn-take (2) respectively.

2. a kind of drilling well pipe centralising device according to claim 1, it is characterized in that: described in the turn-take outer ring of (2) be also provided with four positioning rollers of turn-taking (5), described four positioning rollers of turn-taking (5) are rotated and are arranged on support (2) by positioning roller bearing pin, and described four positioning rollers of turn-taking (5) are uniform along the outer ring of turn-take (2), offset with the outer ring of turn-take (2) simultaneously.

3. a kind of drilling well pipe centralising device according to claim 1, is characterized in that: described two drive fluid cylinders (4) to be parallel to each other, and to drive the axial angle β of fluid cylinder (4) and support (2) be that 27 degree are to 29 degree.