Surety is performing system maintenance this weekend. Electronic date stamps on new Prior Art Database disclosures may be delayed.
Browse Prior Art Database


IP.com Disclosure Number: IPCOM000197703D
Publication Date: 2010-Jul-19
Document File: 1 page(s) / 32K

Publishing Venue

The IP.com Prior Art Database


A means by which a rotary coring tool experiencing differential pressure body adhesion to well-bore face or drill bit entrapment due to collapsed formation can be forced away from the formation to free tool or extract drill bit from sidewall annulus allowing continuation of service and prevent drill bit pull off or tool fishing.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 1

[This page contains 3 pictures or other non-text objects]