Wellbore consolidating tool for rotary drilling applications

Details Wellbore consolidating tool for rotary drilling applications Wellbore consolidating tool for rotary drilling applications

2008-11-25

2010-10-12

Stephenson, Daniel P (Department: 3676)

Wells

Brushing, scraping, cutting or punching-type cleaners

On tubing or casing

C175S072000, C175S325300

Reexamination Certificate

active

07810559

ABSTRACT:
A subpart of a drill string is described having an outer circumferential surface which is contoured and adapted to engage the wall of the borehole with a small angle of attack while exerting during rotary drilling operations an compacting pressure on mud cake and/or cuttings present in the annulus between the drill string and the borehole.

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Fontenot et al, “Casing drilling proves successful in South Texas”, World Oil, Oct. 2002, pp. 27-32.
Shepard et al, “Casing drilling: an emerging technology”, SPE/IADC Drilling Conference, Amsterdam, The Netherlands, Feb. 27-Mar. 1, 2001, IADC/SPE 67731.

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