Running and cementing tubing

Inactive Publication Date: 2007-08-16
ANDERGAUGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007] According to a first aspect of the present invention there is provided a method of running a bore-lining tubing string into a bore, the

Problems solved by technology

The outer diameter of the strings will be only slightly less than the bore inner diameter and thus, particularly in extended reach and highly deviated bores, there may be considerable friction between the string and the bore tending to resist movement of the string through the bore.
However, it may prove difficult to apply torque from surface to rotate such a shoe, as the connec

Method used

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  • Running and cementing tubing
  • Running and cementing tubing
  • Running and cementing tubing

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DETAILED DESCRIPTION OF THE DRAWINGS

[0027] Reference is first made to FIG. 1 of the drawings, which illustrates the leading end of a string of bore-lining tubing 10 incorporating apparatus 12 in accordance with an embodiment of the present invention. In particular, the tubing is in the form of liner 10 intended to form the last lined section of a drilled bore 14 which has been drilled from surface to intersect a hydrocarbon-bearing formation. In this embodiment the liner has a solid wall, but other embodiments of the invention may involve use of slotted or otherwise perforated tubing.

[0028] The apparatus 12 comprises a shock sub 16, an agitator 18, a downhole motor 20 and a drill bit 22 and, as will be described, is used to facilitate running the liner string 10 into the bore 14 and then cementing the liner string 10 in the bore.

[0029] The drill bit 22 and downhole motor 20 are substantially conventional and are used in this embodiment to clear obstructions from the bore 14 as th...

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Abstract

A method of running a bore-lining tubing string into a bore includes running a tubing string, typically a liner string, into a bore while agitating the string. The agitation of the string reduces the friction between the string and the bore wall and thus facilitates the translation of the string into the bore. The agitation may also take place while the tubing is being cemented in the bore. Pressure pulses may be applied to fluid in the bore, which fluid may be cement slurry.

Description

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Claims

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Application Information

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Owner ANDERGAUGE
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