Abrasives for well cleaning

Details Abrasives for well cleaning Abrasives for well cleaning

1997-12-10

2000-03-07

Neuder, William

Wells

Processes

Cleaning or unloading well

F21B 3700

Patent

active

060327413

ABSTRACT:
Novel abrasive particles for cleaning subterranean wellbores are described. The particles are rounded, preferably spherical, and has a hardness of 80 to 200 Vickers. The particles are preferably made of non-metallic material such as Calcite pellets. The new abrasives cause significantly less damage to the well tubulars than sand.

REFERENCES:
patent: 3866683 (1975-02-01), Maly et al.
patent: 4442899 (1984-04-01), Zublin
patent: 4537604 (1985-08-01), Dawson
patent: 5160547 (1992-11-01), Kirschner et al.
patent: 5308404 (1994-05-01), Yam et al.
Notification of Transmittal of the International Search Report or the Declaration.
International Search Report including EPO Patent Abstracts of Japan, Publication Nos. 57015671 and 57092521.
Derwent Search Report No. AN-89-124789.
"Combined Search and Examination Report", U.K. Patent Office, Cardiff Road, Newport, Gwent NP9 1RH, Jul. 30, 1997.

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