Borehole tool

Details Borehole tool Borehole tool

1982-04-19

1983-07-19

Martin, Jr., William D.

Geometrical instruments

Indicator of direction of force traversing natural media

Process

33312, 33314, 33357, 324221, 324225, E21B 4700

Patent

active

043935982

ABSTRACT:
A surface activated multishot survey tool utilizes a dampened magnetic compass movably positioned within a probe to determine the direction of a borehole. Lamps in the probe are operable to light the face of the compass. A lens projects the image of the compass onto a movable film strip. An electrical cable is connected to the probe and is used to pass a current to the lamps and provide selective operation of the tool from the surface of the borehole. Electrical connectors are provided at each end of the probe so that the probe may be inverted within the borehole to accommodate surveys in which the angle of the borehole is greater than that at which the compass will operate without error. Because connectors are located at both ends of the probe, electrical current passes around the magnetic compass, thus creating a magnetic field about the compass. An alternating current is used to operate the tool, with the rate of change in direction of the current being faster than the movement response time of the dampened compass to the changing magnetic field generated by the current.

REFERENCES:
patent: 2703053 (1955-03-01), Castel
patent: 2940177 (1960-06-01), Bricaud
patent: 3588908 (1971-06-01), Lindsey

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-744878