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Apparatus and method for conveying tool along non-vertical well

A conveying tool, non-vertical technology, applied in the direction of wellbore/well components, earthwork drilling and production, etc., can solve the problem of increasing the force required for the cable

Inactive Publication Date: 2006-04-19
SCHLUMBERGER OVERSEAS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, increasing the diameter of the cable to deliver greater power, both hydraulic and electrical, simultaneously increases the effort required to drag a heavier cable along a horizontal wellbore

Method used

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  • Apparatus and method for conveying tool along non-vertical well
  • Apparatus and method for conveying tool along non-vertical well
  • Apparatus and method for conveying tool along non-vertical well

Examples

Experimental program
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Embodiment Construction

[0059] FIG. 1 schematically shows the situation of lowering a running tool string 10 into a deviated well 12 . The wellbore 12 is usually lined with steel casing 13, which is bonded in place within the formation and may have additional production tubing. However, uncased open hole wells are also contemplated by the present invention. The downhole tool string 10 has at least one logging tool 14 mounted on a delivery device 16 . The downhole tool string 10 also has an electronics barrel 17 for controlling the conveyance device 16 . In some cases, the electronics cartridge 17 also controls the logging tool 14 and in some cases the electronics cartridge has one or more logging sensors to function as the logging tool 14 . The downhole toolstring 10 is suspended by an armored cable 18 comprising armored electrical conductors (single-core cable) to transmit power and control signals from the surface to the downhole toolstring and to transmit data telemetry from the tool to the surf...

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PUM

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Abstract

A conveyance apparatus for conveying at least one logging tool through an earth formation traversed by a horizontal or highly deviated borehole is disclosed. The conveyance apparatus comprises a pair of arcuate-shaped cams pivotally mounted to a support member, means for biasing the arcuate surface of each cam into contact with the borehole wall, and actuators operatively connected to each cam. A logging tool is attached to the conveyance apparatus. When either actuator is activated in a first direction, the cam connected to the activated actuator is linearly displaced forward and the arcuate surface of the cam slides along the borehole wall. When either actuator is activated in a second direction, the activated actuator pulls the connected cam backwards and the biasing means thereby urges the arcuate surface of the cam to lock against the borehole wall. Once the cam is locked, further movement of the actuator propels both the conveyance apparatus and the logging tool forward along the highly deviated or horizontal borehole.

Description

technical field [0001] This application is a continuation-in-part of pending US Patent Application Serial No. 08 / 924,672, filed September 5, 1997, and is also entitled to Provisional Application Serial No. 60 / 088,645, filed June 9, 1998. [0002] The present invention relates generally to tool transport systems, and more particularly to a method and apparatus for transporting tools along non-vertical wellbores. Background technique [0003] To economically produce hydrocarbons from mineral deposits, it is increasingly common to drill wellbores through formations that deviate from the traditional vertical orientation. This deviation can be obtained by drilling the wellbore at an acute angle or at increasing angles from the vertical axis. This deviation can also be obtained by drilling a wellbore extending horizontally from a vertical parallel borehole. Typically, the tool is tied to a wireline and lowered into the borehole to log the formations around these deviated or hori...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B23/14E21B23/10
Inventor A·J·萨尔沃塞R·A·波斯特C·J·罗伊
Owner SCHLUMBERGER OVERSEAS SA