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Tubular pile dragging device

A technology of tractor and pipe string, which is applied in the direction of wellbore/well parts, earthwork drilling and production, etc. It can solve the problems that hinder the development of extended-reach wells and horizontal wells, and the difficulty of running pipe strings. It achieves good results, convenient manufacture, work reliably

Inactive Publication Date: 2008-08-20
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The difficulty of running pipe strings hinders the development of extended reach wells and horizontal wells

Method used

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  • Tubular pile dragging device
  • Tubular pile dragging device
  • Tubular pile dragging device

Examples

Experimental program
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Embodiment Construction

[0020] The pipe string tractor mainly includes pipe string shorting 1, controller 3, valve 2, valve 4, valve 5, valve 6, bypass channel 10, body 14, piston assembly 13, piston rod assembly 9, hydraulic cylinder 11, Hydraulic cylinder 12, well wall fixer 7, anchor fluke 16. The pipe string short 1 is a part of the body 14, and it is connected with the front end of the pipe string to be lowered during operation. The piston assembly 13 is placed in the hydraulic cylinder. The piston rod assembly 9 connects the piston assembly 13 and the well wall holder 7 together. There is a channel 15 in the piston rod assembly 9, through which the fluid in the hydraulic cylinder 11 can enter the inner chamber of the well wall holder 7. A bypass passage 10 is provided between the pipe string short 1 and the hydraulic cylinder 11, which makes the fluid in the liquid cylinder 11 communicate with the fluid in the pipe string short 1. The valve 2 is installed on the cylinder wall of the hydrauli...

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PUM

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Abstract

The invention provides a column jacket retractor which is beneficial to a person-down column jacket during the drilling process. The column jacket retractor mainly includes a short circuit 1 of the column jacket, a controller 3, a valve 2, a valve 4, a valve 5, a valve 6, a bypass channel 10, a body 14, a piston assembly 13, a piston rod assembly 9, a liquid cylinder 11, a liquid cylinder 12 and a well wall fixer 7. A ground liquid power pump is utilized to apply pressure on the fluid in the column jacket needed person-down to lead the valve 2, the valve 4, the valve 5 and the valve 6 to be opened and closed according to a regular sequence through whether the controller 3, the valve 5 and the valve 6 touch the body 14 or not, so as to lead the fluid to generate pull which is not less than 200kN in the liquid cylinder 11 to draw the column jacket to move forwards. The invention is especially applicable for the completion work of large displacement wells and horizontal wells and is beneficial to solving the problem that the column jackets of the large displacement wells and horizontal wells are hard for person to get down. The column jacket retractor can be combined to use with other methods that are beneficial to person to get down to the column jackets and has better effect.

Description

technical field [0001] The invention relates to a longer traction device which helps pipe strings to run into a horizontal well section in oil and natural gas drilling engineering. Background technique [0002] In oil and natural gas development projects, in addition to drilling vertical wells, horizontal wells and extended-reach wells are also drilled as required. Horizontal wells and extended-reach wells have outstanding advantages in increasing single well production, improving recovery, and developing oil and natural gas resources. Therefore, the number of this type of wells is increasing day by day, and the horizontal well section is also continuously lengthening. At the same time, the problem of difficulty in running pipe strings in extended-reach wells and horizontal wells has become increasingly prominent. [0003] Usually, the driving force for running the pipe string is mainly gravity. In extended-reach wells and horizontal wells, since the gravity direction of th...

Claims

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Application Information

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IPC IPC(8): E21B23/04
Inventor 陈浩
Owner SOUTHWEST PETROLEUM UNIV