公开(公告)号：NO319744B1

公开(公告)日：2005-09-12

申请号：NO975840

申请日：1997-12-11

Applicant: WEATHERFORD LAMB

Inventor： HOLBERT MARVIN L ,  HASLETT JAMES W ,  SMALLWOOD ROBERT E ,  TROFIMENKOFF FREDERICK N

IPC: E21B47/01 ,  E21B17/00 ,  E21B47/12 ,  F16L25/02

Abstract: An insulator for a subsurface signal transmitting apparatus. The insulator includes a housing, a mandrel axially disposed inside the housing, a first insulating material disposed between the housing and the mandrel, a first sleeve formed of a second insulating material disposed between the housing and a first tubular member and the first tubular member coupled to the mandrel.

公开(公告)号：CA2476370C

公开(公告)日：2009-06-09

申请号：CA2476370

申请日：2004-07-30

Applicant: WEATHERFORD LAMB

Inventor： CAMWELL PAUL ,  LOGAN DEREK ,  NERO MICHAEL ,  DOPF TONY ,  SMALLWOOD ROBERT E ,  HORST CLEMENS L

IPC: E21B17/00 ,  E21B47/01 ,  E21B47/12 ,  F16L25/02

Abstract: A compact, robust, wear resistant, and high performance electrically insulating gap sub for use with borehole EM Telemetry is disclosed. In one embodiment, the gap sub may include an externally threaded mandrel separated from an internally threaded housing by a dielectric material. Additionally, some embodiments may include an external gap ring for separating the upper and lower electrical halves of the sub which offers structural support, acts as the primary external seal, and provides an abrasion resistant non-conductive length on t he exterior. Some embodiments may include torsion bins to prevent the possible unscrewing of the dielectric filled threaded sections should the dielectric material become damaged or weakened.

公开(公告)号：CA2476370A1

公开(公告)日：2005-01-31

申请号：CA2476370

申请日：2004-07-30

Applicant: WEATHERFORD LAMB

Inventor： LOGAN DEREK ,  DOPF TONY ,  CAMWELL PAUL ,  NERO MICHAEL ,  HORST CLEMENS L ,  SMALLWOOD ROBERT E

IPC: E21B17/00 ,  F16L25/02 ,  E21B47/06

Abstract: A compact, robust, wear resistant, and high performance electrically insulating gap sub for use with borehole EM Telemetry is disclosed. In one embodiment, the gap sub may include an externally threaded mandrel separated from an internally threaded housing by a dielectric material. Additionally, some embodiments may include an external gap ring for separating the upper and lower electrical halves of the sub which offers structural support, acts as the primary external seal, and provides an abrasion resistant non-conductive length on t he exterior. Some embodiments may include torsion bins to prevent the possible unscrewing of the dielectric filled threaded sections should the dielectric material become damaged or weakened.

公开(公告)号：AT204360T

公开(公告)日：2001-09-15

申请号：AT96918551

申请日：1996-06-11

Applicant: WEATHERFORD LAMB

Inventor： HOLBERT MARVIN L ,  HASLETT JAMES W ,  SMALLWOOD ROBERT E ,  TROFIMENKOFF FREDERICK N

IPC: E21B47/01 ,  E21B17/00 ,  E21B47/12 ,  F16L25/02

Abstract: An insulator for a subsurface signal transmitting apparatus. The insulator includes a housing, a mandrel axially disposed inside the housing, a first insulating material disposed between the housing and the mandrel, a first sleeve formed of a second insulating material disposed between the housing and a first tubular member and the first tubular member coupled to the mandrel.