Device, preferably for underground purposes, to transfer informa

Details Device, preferably for underground purposes, to transfer informa Device, preferably for underground purposes, to transfer informa

1987-12-10

1988-11-15

Massie, IV, Jerome

Boring or penetrating the earth

With signaling, indicating, testing or measuring

Tool position direction or inclination measuring or...

175 48, E21B 4400

Patent

active

047842296

ABSTRACT:
A choker valve assembly for a drill string is provided for transmitting information measured in an underground bore hole by sensing devices, to the surface by modulating the pressure of the flushing fluid. The valve assembly includes a housing that is non-rotatably connected within the flushing fluid flow passage by cross-pieces extending between the housing and a portion of the inner pipe wall. A drag body valve element is mounted by the housing and is axially displaceable with respect to a tapered restriction portion of the inner pipe. Drive means for displacing the valve element is located outside the housing and extends between the valve element and the pipe wall through the cross-pieces. A cap is provided on each end of the valve element. The cap facing the direction of flushing fluid flow extends beyond the perimeter of the housing and the cap facing away from the direction of flushing fluid flow is entirely within the perimeter of the housing to provide a hydrodynamically pressure-compensated choker valve assembly.

REFERENCES:
patent: 4044834 (1977-08-01), Perkins
patent: 4407374 (1983-10-01), Wallussek et al.
patent: 4470430 (1984-09-01), Lancaster
patent: 4535429 (1985-08-01), Russell et al.
patent: 4596293 (1986-06-01), Wallussek et al.

Affiliated with

Also associated with

Rating

Device, preferably for underground purposes, to transfer informa does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device, preferably for underground purposes, to transfer informa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device, preferably for underground purposes, to transfer informa will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1098492