Well drilling tool

Details Well drilling tool Well drilling tool

1991-09-16

1994-05-03

Beck, Shrive

Coating processes

Immersion or partial immersion

Chemical compound reducing agent utilized

427438, 427305, C23C 2600

Patent

active

053086600

ABSTRACT:
The invention relates to improvement in well drilling tools to prevent drilling fluids and solid particles present in a subterranean location from adhering to drilling equipment. A nickel-phosphorus coating is deposited by an electroless plating process on the entire surface of the tool, so as to substantially reduce porosity of the tool and prevent penetration of the foreign matter into the ferrous core of the tool.

REFERENCES:
patent: 2997783 (1961-08-01), Crehan
patent: 3029158 (1962-04-01), Lee
patent: 3716348 (1973-02-01), Perkins
patent: 3953624 (1976-04-01), Arnold
patent: 4358923 (1982-11-01), Feldstein
patent: 4381227 (1983-04-01), Narcus
patent: 4830889 (1989-05-01), Henry
Malathy Pushpavanam et al. "Electroless Nickel--a versatile coating", Finishing Industries, Jun. 1977, pp. 48-50, 52, 58.
C. K. Mital et al. "Electroless Nickel--Phosphorus-Boron Alloy Coatings", Metal Finishing, Oct. 1986, pp. 67-70.
Fielding Ogburn et al. "Density of Autocatalytic Nickel-Phosphorus Deposits", Plating & Surface Finishing, Mar. 1981, p. 45.

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