CN201367868Y

CN201367868Y - Coiled-tubing idler wheel centralizing guider for horizontal well

Info

Publication number: CN201367868Y
Application number: CNU2009200789820U
Authority: CN
Inventors: 潘勇; 朱炬辉; 张道鹏; 张剑; 钱斌; 徐艳丽; 钟兴久
Original assignee: UNDERGROUND OPERATION COMPANY CNPC SICHUAN PETROLEUM GEOPHYSICAL PROSPECTING Co
Current assignee: UNDERGROUND OPERATION COMPANY CNPC SICHUAN PETROLEUM GEOPHYSICAL PROSPECTING Co; CNPC Chuanqing Drilling Engineering Co Ltd
Priority date: 2009-02-11
Filing date: 2009-02-11
Publication date: 2009-12-23
Anticipated expiration: 2019-02-11

Abstract

A coiled-tubing idler wheel centralizing guider for a horizontal well relates to the technical field of the design and the manufacture of centralizing tools used in the coiled tubing operation of the horizontal well. The centralizing guider comprises a connecting pipe and a centralizing rolling device, wherein the connecting pipe consists of a connecting hoop and a central pipe, the centralizing rolling device consists of a centralizing body, and an idler wheel is arranged on the centralizing body. The utility model provides the coiled-tubing idler wheel centralizing guider for the horizontal well, which overcomes the problem of larger sliding friction generated underground in the prior art, and has the characteristics of changing the sliding friction to the rolling friction, and facilitating the descent of the coiled-tubing to the preset well-depth position.

Description

Horizontal well is set upright guide with the coiled tubing roller

Technical field:

A kind of horizontal well is set upright guide with the coiled tubing roller, is used for the construction operation of industrial gas oil at horizontal well use coiled tubing, relates to the design and manufacturing technology field of the instrument of setting upright when adopting the coiled tubing operation in the horizontal well.

Background technology:

Along with deepening continuously of oil-gas field development and improving constantly of drilling technology level, high angle hole, horizontal well has become the effective means that improves the well yield and the rate of oil and gas recovery, therefore, adopt high angle hole, the construction of horizontal well is also more and more, and these adopt high angle hole, the well of horizontal well technology construction is carrying out acidifying, during construction operation such as pressure break or well workover, usually need to use the coiled tubing operation, these operations mainly contain the horizontal well coiled tubing and drag acidifying, operations such as horizontal well coiled tubing jetting pressure break, major technique is with the following operation of carrying out well stimulation to the horizontal segment of horizontal well of coiled tubing, but, because the caliber of coiled tubing is little, flexible big, and high angle hole, horizontal well is bigger in the well flexibility of down-hole, so frictional resistance fashionable down in these wells is bigger, therefore be lowered to comparatively difficulty; For the work that makes the coiled tubing G.I.H can be carried out smoothly, prior art has adopted centralizer and drag reduction slide block fashionable down in the pipe string, the centralizer of coiled tubing use at present is that slide block is installed on centralizer, the shortcoming of technology is at present: owing to be sliding shoe, therefore, can only slide, can not rotate, in the process that coiled tubing is lowered to, when the slide block on the centralizer slides, can produce bigger sliding friction in down-hole casing, particularly when slide block is mobile in high angle hole and horizontal hole, because the bending of well, can be bigger influence smooth and easy be lowered to of coiled tubing in high angle hole and horizontal well.

Summary of the invention:

The purpose of this utility model is the bigger problem of frictional resistance when sliding at prior art, use the mode of rolling drag reduction to reduce friction factor, provide a kind of horizontal well that in high angle hole, horizontal well, is lowered to coiled tubing that is applicable to set upright guide with the coiled tubing roller.

The utility model is achieved in that the utility model comprises and takes over and set upright tourelle that it is characterized in that: described adapter is made of box cupling 1 and central tube 2, box cupling by screwed connection on central tube 2; Set upright tourelle and be made of centralizer body 8, centralizer body 8 is enclosed within on the central tube 2, is provided with six wiper blocks 3 on centralizer body 8, is V-shaped groove 7 between wiper block 3, evenly is furnished with groove 6 on wiper block 3, is provided with roller 4 in groove 6;

Described roller 4 is installed in the groove 6 by roller shaft 5;

In each described groove 6, two rollers 4 are installed;

On described centralizer body 8, evenly be furnished with six V-shaped grooves 7;

During use, the utility model is connected the coiled tubing lower end, because centralizer is provided with roller 4, when rolling, realize roller 4 carries out rolling friction equably with the down-hole casing inwall purpose, reduced the frictional resistance that coiled tubing is lowered in high angle hole or horizontal well; In addition, when operation, the utility model can make and be attached thereto the power tool that connects and be in center condition; Because central tube 2 of the present utility model is the pipe of hollow, therefore can be communicated with space up and down, fluid is flowed in the pipe string freely.

The beneficial effects of the utility model are: the roller of employing has become the rolling drag reduction with the slip drag reduction of prior art, the change sliding friction is rolling friction, effectively reduced friction factor, be convenient to coiled tubing smoothly down to predetermined well depth position, be enclosed within centralizer body on the central tube in the roller axial rotation, can also realize horizontal rotation, can not make the distortion of pipe string, have simple in structure, convenience operation.

Description of drawings:

Accompanying drawing is a structural representation of the present utility model

The specific embodiment:

Provide embodiment of the present utility model below in conjunction with accompanying drawing: the utility model comprises takes over and sets upright tourelle, take over to constitute by box cupling 1 and central tube 2, box cupling 1 by screwed connection on central tube 2; Setting upright tourelle is made of centralizer body 8, on centralizer body 8, circumferentially be provided with six wiper blocks 3, it between wiper block 3 V-shaped groove 7, the V-shaped groove 7 that is provided with can increase the liquid passage excessively of annular space between oil pipe and the sleeve pipe, reduce resistance by fluid, on wiper block 3, evenly be furnished with groove 6, in groove 6, be provided with roller 4, roller 4 is to be installed in the groove 6 of wiper block 3 by roller shaft 5, in each groove 6 on wiper block 3 two rollers 4 are installed, therefore in the week of centralizer body 8 12 rollers are installed altogether upwards, can guarantee to have at least four rolling to contact with internal surface of sleeve pipe in the down-hole, the centralizer body 8 that is provided with is sleeved on the central tube 2, and centralizer body 8 can freely rotate and move up and down on central tube 2, and the up and down distance of centralizer body 8 on central tube 2 is 0～45mm;

During installation, earlier the centralizer body of making 8 is sleeved on the central tube 2, then box cupling 1 is connected on the central tube 2, after installing, the centralizer body 8 that is enclosed within on the central tube 2 can move up and down on central tube 2, and maximum moving distance is 45mm; During use, mounted horizontal well is set upright the lower end that guide is connected coiled tubing with the coiled tubing roller, also can be installed in the position that to set upright, because the roller of installing on the centralizer body 8 is the waist drum type, the radian of waist drum type and down-hole casing internal face are approaching, therefore, behind G.I.H, roller just can be equably carries out rolling friction with the inwall of down-hole casing, original sliding friction is become rolling friction, can reduce the frictional resistance that coiled tubing is lowered to greatly in high angle hole or horizontal well; Needs according to construction, therefore usually also be connected with power tool in lower end of the present utility model, in sleeve pipe, it can make and be attached thereto the power tool that connects and be in center condition, in addition because central tube 2 and box cupling 1 all are hollow circular tubes, the space up and down that can go here and there communicating pipe.

Claims

1, a kind of horizontal well is set upright guide with the coiled tubing roller, comprises taking over and setting upright tourelle, and it is characterized in that: described adapter is made of box cupling and central tube, box cupling by screwed connection on central tube; Set upright tourelle and be made of centralizer body, centralizer body is enclosed within on the central tube, is provided with six wiper blocks on centralizer body, is V-shaped groove between wiper block, evenly is furnished with groove on wiper block, is provided with roller in groove.

2, horizontal well according to claim 1 is set upright guide with the coiled tubing roller, it is characterized in that: described roller is installed in the groove by roller shaft.

3, horizontal well according to claim 1 is set upright guide with the coiled tubing roller, it is characterized in that: two rollers are installed in each described groove.

4, horizontal well according to claim 1 is set upright guide with the coiled tubing roller, it is characterized in that: evenly be furnished with six V-shaped grooves on described centralizer body.