Rate of penetration recorder

Details Rate of penetration recorder Rate of penetration recorder

1981-05-06

1983-01-04

Griffin, Donald A.

Recorders

Combined with external recorder operating means

Well logging

731515, G01D 900, E21B 4500

Patent

active

043674771

ABSTRACT:
An apparatus for measuring the rate of movement of one object with respect to another, such as a drilling rate recorder used to measure the rate of penetration of a drill bit during drilling operations. One embodiment of the invention includes a frame, a motion imparting means for imparting motion from a drill string; a first arm having one end pivotally mounted on the frame, a second arm pivotally mounted on the first arm, a first cam attached to the motion imparting means and adapted to cause the second arm to pivot about the first arm, and a recording means.

REFERENCES:
patent: 2980486 (1961-04-01), Melton
patent: 3010777 (1961-11-01), Melton et al.
patent: 3076966 (1963-02-01), Suter et al.
patent: 3220251 (1965-11-01), Pearson

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