Well drilling tool

Details Well drilling tool Well drilling tool

1979-04-27

1981-08-18

Leppink, James A.

Boring or penetrating the earth

With signaling, indicating, testing or measuring

175228, 175107, 175237, E21B 4700

Patent

active

042841496

ABSTRACT:
A well drilling tool is disclosed as having a reservoir for supplying lubricant to a bearing chamber to replace that which is lost during operation of the tool, and a means for indicating to an operator at surface level when a predetermined volume of such lubricant has been lost.

REFERENCES:
patent: 3866988 (1975-02-01), Striegler
patent: 3997009 (1976-01-01), Fox
patent: 4114702 (1978-09-01), Maurer et al.

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