Donald Paul Holmes

Author:

Donald D. Holmes

ISBN #:

0813803284

Author:

Donald D. Holmes

ISBN #:

0813825555

Author:

Donald B. Holmes

ISBN #:

0517541467

Author:

Donald W. Holmes

ISBN #:

0595335055

US Patent:

6395098, May 28, 2002

Filed:

Jan 24, 2000

Appl. No.:

09/490137

Inventors:

Donald S. Holmes - Remlap AL 35133

International Classification:

B08B 902

US Classification:

134 8, 1510405, 1510416

Abstract:

A grinding shoe is designed to be a passive grinder that is advanced within the bore of a pipe being rotated in a typical pipe operation. Apparatus currently used to deliver reamer rocks on the end of a rotating lance can be modified to achieve considerable cost savings. Specifically, the apparatus utilizes a lance for advancing the shoe within the pipe without rotation. The shoe is affixed near the end of the lance in a selected attitude that determines the degree of grinding to be accomplished. A pair of shoe walls extending substantially paraxially with the rotating tube form a dual reaming head which engages the pipe interior across a cord over the bottom of the pipe.

US Patent:

60224223, Feb 8, 2000

Filed:

Jul 24, 1998

Appl. No.:

9/121928

Inventors:

Donald S. Holmes - Remlap AL

International Classification:

B08B 902

US Classification:

134 8

Abstract:

A grinding shoe is designed to be a passive grinder which is advanced within the bore of a pipe being rotated in a typical pipe operation. Apparatus currently used to deliver reamer rocks on the end of a rotating lance can be modified to achieve considerable cost savings. Specifically, the apparatus utilizes a lance for advancing the shoe within the pipe without rotation. The shoe is affixed near the end of the lance in a selected attitude which determines the degree of grinding to be accomplished. A pair of shoe walls extending substantially paraxially with the rotating tube form a dual reaming head which engages the pipe interior across a chord over the bottom of the pipe.