Drilling method and downhole cleaning tool

Details Drilling method and downhole cleaning tool Drilling method and downhole cleaning tool

2007-08-01

2011-12-13

Thompson, Kenneth L (Department: 3676)

Wells

Processes

Cleaning or unloading well

C166S223000, C175S102000

Reexamination Certificate

active

08074717

ABSTRACT:
A method for drilling a well with a drilling apparatus comprising a drill string and a bit, comprising attaching a cleaning tool comprising a coaxial pipe and at least one vortex spinner to a portion of the drill string above the bit, inserting the drill string into a wellbore, extending the wellbore while simultaneously pumping fluid through the cleaning tool to create a fluid flow, and loosening debris attached to the wellbore.

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Bakker et al., “Cavitator for Effective Well Cleaning”, Apr. 9-10, 2002, pp. 1-4, Houston Texas. Ivannikov/Whirlwind International BV, SPE 75352.
Crabtree, M. et al : “Fighting Scale-Removal and Prevention” Oilfield Review, [Online] 1999, pp. 30-45, XP002455131 Elsevier, Amsterdam NL Retrieved from the Internet: URL:http://www.slb.com/media/services/resources/oilfieldreview/ors99/aut99/fighting.pdf> [retrieved on Oct. 16, 2007] p. 37, col. 2-p. 39, col. 2.

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