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Mechanism helping to make traction on flat surface and non-flat surface

A towed, link mechanism technology, used in mechanical equipment, construction, earth-moving drilling, etc., can solve the problems of not allowing the pipe diameter and the inability to pull the system through the casing connection.

Inactive Publication Date: 2004-05-12
SCHLUMBERGER OVERSEAS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The system does not allow the pulling system to pass through the casing connection and does not allow pipe diameter changes while pulling

Method used

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  • Mechanism helping to make traction on flat surface and non-flat surface
  • Mechanism helping to make traction on flat surface and non-flat surface
  • Mechanism helping to make traction on flat surface and non-flat surface

Examples

Experimental program
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Effect test

Embodiment Construction

[0021] Such as figure 1 and 2 As shown, the six-bar linkage mechanism constituted according to the principles of the present invention is generally represented by a reference number 1, and it is provided with a pair of centering links 4 and 6, each centering link has an upper end and a lower end, and its upper end is connected to the supporting link 12 Link to each other, and its lower end links to each other with central link 10. Although the centering and centering links may be of any desired configuration depending on the tool mechanism they are associated with, for purposes of illustration they and the other links in the six-bar linkage are shown as essentially thin Long straight rod pieces. The centering link 6 is rotatably connected to the central link 10 so as to be rotatable relative to the central link 10 around a pivotal connection 22 having a pivot between the ends of the central link 10 It is fixed on the central link 10 at the middle point of it. The pivot con...

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PUM

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Abstract

A six-bar linkage mechanism for conforming to the configuration of a tractored surface having a central link defined by a tool body and a saddle link spaced from the central link and movable for conforming with the tractored surface. A pair of front links each having pivotal connection with respective ends of the saddle link and having linearly movable pivotal connection with the central link to permit angular and spacing changes of the saddle link relative to the central link. A pair of centralizer links are located between the front links and have pivotal connections with the saddle link and pivotal connections with the central link. One of the pivotal connections is linearly movable on the central link. For tractor tools, when the tractored surface is a wellbore or well pipe, a plurality of six-bar linkages radiate from a tool body for surface conforming traction with the tractored surface.

Description

[0001] This application claims priority to US Provisional Application 60 / 369,385, filed April 2, 2002, which is incorporated herein by reference. 【Technical field】 [0002] The invention relates to a traction mechanism used in wells. More particularly, the present invention relates to a mechanism for traction in wells having flat and uneven surfaces that adjusts or changes its configuration according to the internal surface configuration of the wellbore, well casing or tubing over which it is moved , to aid in traction. Even more particularly, the invention finds particular application in the field of wellbore tractors for conveying logging and maintenance tools in deviated or horizontal oil and gas wells or pipelines where such tools are not conveniently carried by gravity delivery. 【Background technique】 [0003] US4557327 discloses a rolling arm centering mechanism in the form of a four-bar linkage mechanism. A disadvantage of this mechanism for traction is that the fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/10E21B23/00E21B23/14
CPCE21B23/14E21B2023/008E21B17/1021E21B23/001Y10T74/18928
Inventor J·C·格雷罗
Owner SCHLUMBERGER OVERSEAS SA
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