Coring tools and related methods

摘要

A coring bit for extracting a sample of subterranean formation material from a well bore may include a bit body having a bit face and an inner surface defining a substantially cylindrical cavity of the bit body. A first portion of the inner surface may be configured to surround a core catcher. The coring bit may include a face discharge channel inlet formed in the inner surface of the bit body longitudinally at or above the first portion of the inner surface. The coring bit may also include a face discharge channel extending through the bit body from the face discharge channel inlet to the bit face. A tubular body having a core catcher may be disposed in the coring bit to form a coring tool. Methods of forming such bit bodies may include forming an inlet for a face discharge channel in the inner surface of the bit body at a location longitudinally at or above the first portion of the inner surface and forming a face discharge channel extending from the inlet to the bit face.

主权项

1. A coring tool for extracting a sample of subterranean formation material from a well bore, comprising:
a tubular body disposed within a bit body and comprising:
an inner tube; anda core shoe at an end of the inner tube and having a central bore configured to receive and guide a core into the inner tube; a core catcher housed within the central bore of the core shoe; and at least one face discharge channel extending through the bit body from a face discharge channel inlet to a face of the bit body, the face discharge channel inlet in fluid communication with a fluid flow path defined by a space between the tubular body and the bit body and located longitudinally above a widest portion of the core shoe and proximate an upper end of the core catcher.