US 5,348,137 AGranted

Vertical tensioning and anti-rotational device for use with single continuous rope conveyor lifting system

OwnerR. Gary Palmerinventor

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Abstract

A vertical tensioning and anti-rotational device for use with a single continuous rope conveyor lifting system, the lifting system having a series of powered pulleys disposed at the top of a well for continuously driving a rope in a closed loop into the well, into and out of downhole fluids, and back to the top of the well, carrying a portion of such fluids out of the well. The device includes a tubular body open at one end, and a tension bar telescoped into the open end. The tubular body and tension bar member are adapted to fit diametrically into a well bore. A spring biases the tension bar member away from the tubular body. Extension bar members are disposed on the opposite ends of the tubular body and tension bar member, and extend longitudinally axially along the walls of the well bore. Sharp-edged rollers are disposed on the upper and lower ends of the extension bar members. The spring biases the rollers against the walls of the well bore, and the rollers prevent the device from rotating. The conveyor rope loops around a sheave mounted near the center of the upper surface of the tubular body. A dead weight is attached near the center of the lower surface of the tubular body.

a tubular body open at a first end, said tubular body having a longitudinal axis;
means rotatably affixed to said tubular body for receiving said rope and for permitting said rope to loop around said tubular body on its way into and then out of the well bore;
a tension bar member having a first end telescopingly received in said open first end of said tubular body;
said tubular body and said tension bar member being adapted for placement diametrically into the well bore;
means for biasing said tension bar member away from said tubular body in a longitudinally axial direction;
a first extension bar member having upper and lower ends and disposed on a second end of said tubular body opposite said first end, and extending longitudinally axially of said well bore when said tubular body is diametrically disposed in said well bore, said first extension bar member extending above and below said tubular body;
a second extension bar member having upper and lower ends and disposed on a second end of said tension bar member opposite said first end thereof, and extending longitudinally axially of said well bore when said tension bar member is diametrically disposed in said well bore, said second extension bar member extending above and below said tension bar member;
and
anti-rotational means disposed on said upper and lower ends of said extension bar members for engaging the walls of the well bore and substantially preventing rotation of said device with respect to said well bore, said means for biasing said tension bar member away from said tubular body biasing said anti-rotational means against the well bore walls.

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Abstract

Claims9