公开(公告)号：US3574099A

公开(公告)日：1971-04-06

申请号：US3574099D

申请日：1967-07-06

Applicant: PAN AMERICAN PETROLEUM CORP

Inventor： RYALS JOHN N ,  ANDERSON DUANE B ,  RANDALL BILLY V

IPC: E21B21/00 ,  C10M3/04 ,  C10M1/08 ,  C10M3/14

CPC classification number: E21B21/003 ,  Y10S507/906 ,  Y10S507/91

Abstract: A MIXTURE OF ASBESTOS FIBERS AND GRANULAR PARTICLES WITHIN CRITICAL LIMITS IS USED TO STOP LOSS OF DRILLING FLUID TO DRILLED FORMATIONS.

公开(公告)号：US3629102A

公开(公告)日：1971-12-21

申请号：US3629102D

申请日：1967-06-29

Applicant: PAN AMERICAN PETROLEUM CORP

Inventor： LUMMUS JAMES L ,  RYALS JOHN N

IPC: E21B21/00 ,  C10M3/08 ,  C10M1/14

CPC classification number: E21B21/003

Abstract: In well drilling operations, loss of whole drilling fluid to drilled formations is decreased by maintaining in the drilling fluid a three-component mix. The three components are (1) Ground nutshells or equivalent passing the shale shaker screen but retained on a No. 100 U.S. standard sieve; (2) Nutshell flour or equivalent passing a No. 100 sieve; (3) Sugar cane fibers, preferably waterproofed, ground fine enough to pass the shale shaker screen but coarse enough to seal a bed of BB shot when combined within certain limits with the larger granular particles and the flour.