A core extracting apparatus and method is provided. The annular core extracting apparatus may be dimensioned so as to be lowered into the core groove circumscribing a drilled core. The core extracting apparatus has a cylindrical outer casing encasing a cylindrical inner grabber in a release condition, wherein the inner grabber is adapted to move from the release condition to a gripping condition as the outer casing is lifted from the core groove. The inner grabber provides a plurality of peripheral fingers, each finger providing a wedge along its outer surface, wherein the release condition each wedge nests in a taper provided by the outer casing so that when the inner grabber moves to the gripping condition the wedge interfaces with the outer casing to urge the fingers inward, gripping the core and extracting it from the drilling hole.

A core extracting apparatus and method is provided. The annular core extracting apparatus may be dimensioned so as to be lowered into the core groove circumscribing a drilled core. The core extracting apparatus has a cylindrical outer casing encasing a cylindrical inner grabber in a release condition, wherein the inner grabber is adapted to move from the release condition to a gripping condition as the outer casing is lifted from the core groove. The inner grabber provides a plurality of peripheral fingers, each finger providing a wedge along its outer surface, wherein the release condition each wedge nests in a taper provided by the outer casing so that when the inner grabber moves to the gripping condition the wedge interfaces with the outer casing to urge the fingers inward, gripping the core and extracting it from the drilling hole.

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.

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.