公开(公告)号：US20170292340A1

公开(公告)日：2017-10-12

申请号：US15440403

申请日：2017-02-23

Applicant: Byron Harvey Wade

Inventor： Byron Harvey Wade

IPC: E21B25/12

CPC classification number: E21B25/12 ,  E21B25/02

Abstract: 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.

公开(公告)号：US20170284160A1

公开(公告)日：2017-10-05

申请号：US15628133

申请日：2017-06-20

Applicant: BLY IP INC.

Inventor： CHRISTOPHER L. DRENTH ,  HONGYAN ZHANG

IPC: E21B10/02 ,  E21B25/00 ,  E21B25/10 ,  E21B25/12

CPC classification number: E21B10/02 ,  E21B25/00 ,  E21B25/10 ,  E21B25/12 ,  Y10T29/49826

Abstract: A core lifter and method for making same for use in a drilling system. The core lifter can include a tubular body having an exterior surface and an interior surface and can have a plurality of longitudinally-oriented recesses formed in the exterior surface of the tubular body of the core lifter and extending radially inwardly relative to the central axis of the core lifter. The plurality of longitudinally-oriented recesses formed in the exterior surface of the tubular body of the core lifter can extend along at least 50 percent of the length of the core lifter.

公开(公告)号：US09598911B2

公开(公告)日：2017-03-21

申请号：US14274495

申请日：2014-05-09

Applicant: Baker Hughes Incorporated

Inventor： Thomas Uhlenberg ,  Volker Richert

IPC: E21B10/60 ,  E21B10/02 ,  E21B10/46 ,  E21B25/12 ,  E21B25/00 ,  E21B10/54

CPC classification number: E21B10/605 ,  E21B10/02 ,  E21B10/46 ,  E21B10/48 ,  E21B10/54 ,  E21B25/00 ,  E21B25/12

Abstract: 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.

公开(公告)号：US3540537A

公开(公告)日：1970-11-17

申请号：US3540537D

申请日：1969-06-02

Applicant: LONGYEAR CO E J

Inventor： BROWN HARRY W

IPC: E21B25/10 ,  E21B25/12 ,  E21B25/00

CPC classification number: E21B25/12

公开(公告)号：US2503561A

公开(公告)日：1950-04-11

申请号：US62937345

申请日：1945-11-19

Applicant: LONGYEAR E J CO

Inventor： PICKARD ALBERT F

IPC: E21B10/48 ,  E21B21/10 ,  E21B25/00 ,  E21B25/12

CPC classification number: E21B25/00 ,  E21B10/48 ,  E21B21/10 ,  E21B25/12

公开(公告)号：US1582936A

公开(公告)日：1926-05-04

申请号：US73787324

申请日：1924-09-15

Applicant: ELMER SHRIVER FRANK

Inventor： ELMER SHRIVER FRANK

IPC: E21B25/10 ,  E21B25/12

CPC classification number: E21B25/12 ,  E21B25/10

公开(公告)号：US1574922A

公开(公告)日：1926-03-02

申请号：US71096624

申请日：1924-05-05

Applicant: SULLIVAN MACHINERY CO

Inventor： NELSON SVEN T

IPC: E21B25/12

CPC classification number: E21B25/12

公开(公告)号：US1569653A

公开(公告)日：1926-01-12

申请号：US71096324

申请日：1924-05-05

Applicant: SULLIVAN MACHINERY CO

Inventor： HALVORSEN HALBERT B

IPC: E21B25/12

CPC classification number: E21B25/12

公开(公告)号：US779995A

公开(公告)日：1905-01-10

申请号：US1904220147

申请日：1904-08-09

Applicant: D A CARPENTER ,  DUPUIS DAVID

Inventor： DUPUIS DAVID

CPC classification number: E21B25/12

公开(公告)号：US332587A

公开(公告)日：1885-12-15

申请号：US332587D

CPC classification number: E21B25/12