Casing perforator

Details Casing perforator Casing perforator

1979-02-21

1980-09-02

Novosad, Stephen J.

Wells

Means for perforating, weakening, bending or separating pipe...

Perforating or splitting cutter

83191, 30103, E21B 43112

Patent

active

042202019

ABSTRACT:
A lower portion of water well casing in the ground is perforated by means of a toothed wheel journalled on the end of an arm pivotally carried by an elongated perforator body. The perforator body carries an air driven piston and actuator link connected to pivot the arm and wheel downwardly from an upward retracted position to a lower start position in which a point of one tooth and a flat end of an adjacent tooth contact the interior of the casing. In this start position the axis of rotation of the wheel is in an over-center position, below a line between the arm pivot axis and the point of the upper one of the two teeth that contact the casing surface. In this over-center start position, the perforator body is pulled upwardly so that the wheel teeth are pressed outwardly against the casing surface with great force by the over-center arrangement which urges the wheel axis closer to the casing. Each tooth has a truncated cutting end that extends along a line intersecting an outermost point of the adjacent tooth to provide optimum penetration of the casing wall.

REFERENCES:
patent: 1030992 (1912-07-01), Fulmer
patent: 1125513 (1915-01-01), Graham
patent: 2753935 (1956-07-01), Fredd
patent: 3156285 (1964-11-01), Layne
patent: 3331439 (1967-07-01), Sanford
patent: 4106561 (1978-08-01), Jerome

Affiliated with

Also associated with

Rating

Casing perforator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Casing perforator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Casing perforator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1705065