公开(公告)号：DE602005013921D1

公开(公告)日：2009-05-28

申请号：DE602005013921

申请日：2005-02-10

Applicant: BAKER HUGHES INC

Inventor： DICK AARON J ,  LIN CHIH C

IPC: E21B10/24

Abstract: An earth boring bit has rotating cones with two lubricant passages to increase bearing capacity and cause lubricant circulation. A lubricant reservoir in the body supplies lubricant to passages between the cone and bearing pin. A pressure compensator equalizes lubricant pressure to the exterior of the bit. A first passage leads from the reservoir to the upper side of the bearing pin. A second passage leads from the reservoir to the bearing pin at a point from 185 degrees to 225 degrees as seen from an inner end of the bearing pin. This point is located in a diverging region 51 d of an annular clearance surrounding the bearing pin.

公开(公告)号：MX2009002996A

公开(公告)日：2009-04-01

申请号：MX2009002996

申请日：2007-09-20

Applicant: BAKER HUGHES INC

Inventor： LIN CHIH C

IPC: E21B10/22

Abstract: Una barrena de perforación terrestre tiene un cuerpo de barrena con un perno (15) de cojinete dependiente y un cono (17) que se monta de manera giratoria al mismo. Un sello (29) se sella entre el perno de cojinete y el cono. Un conjunto anular de cerdas (45) se ubica adyacente por lo menos en parte de la superficie del sello dinámico del sello para proteger el sello contra los desechos.

公开(公告)号：NO20064148A

公开(公告)日：2006-09-25

申请号：NO20064148

申请日：2006-09-13

Applicant: BAKER HUGHES INC

Inventor： DICK AARON J ,  LIN CHIH C

IPC: E21B10/24

CPC classification number: E21B10/246

公开(公告)号：CA2556804A1

公开(公告)日：2005-09-09

申请号：CA2556804

申请日：2005-02-10

Applicant: BAKER HUGHES INC

Inventor： LIN CHIH C ,  DICK AARON J

IPC: E21B10/24

Abstract: An earth boring bit has rotating cones with two lubricant passages to increase bearing capacity and cause lubricant circulation. A lubricant reservoir in the body supplies lubricant to passages between the cone and bearing pin. A pressure compensator equalizes lubricant pressure to the exterior of the bit. A first passage leads from the reservoir to the upper side of the bearing pin. A second passage leads from the reservoir to the bearing pin at a point from 185 degrees to 225 degrees as seen from an inner end of the bearing pin. This point is located in a diverging region 51 d of an annular clearance surrounding the bearing pin.