METHOD AND APPARATUS FOR FORCING A PIPELINE INTO OR OUT OF A BOREHOLE
First Claim
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1. A pipe thrusting apparatus for inserting and removing a pipe from a borehole, comprising:
- a first collar and a second collar each configured to expand and contract between a clamped position and a released position around the pipe;
a support frame having at least one anchor securable to the ground;
a first bi-directional driver coupled between the first collar and the support frame;
a second bi-directional driver coupled between the second collar and the support frame; and
wherein the first and second collars are configured to alternate between the clamped and released positions and to alternately move toward and away from the borehole to insert and remove the pipe from the borehole.
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Abstract
A pipe thrusting apparatus for inserting and removing a pipe from a borehole, comprising a collar configured to releasably grip the pipe; a support frame having at least one anchor securable to the ground; and a bi-directional driver coupled between the collar and the support frame, the driver configured to drive the collar toward and away from the borehole to insert and remove the pipe from the borehole.
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Citations
29 Claims
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1. A pipe thrusting apparatus for inserting and removing a pipe from a borehole, comprising:
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a first collar and a second collar each configured to expand and contract between a clamped position and a released position around the pipe; a support frame having at least one anchor securable to the ground; a first bi-directional driver coupled between the first collar and the support frame; a second bi-directional driver coupled between the second collar and the support frame; and wherein the first and second collars are configured to alternate between the clamped and released positions and to alternately move toward and away from the borehole to insert and remove the pipe from the borehole. - View Dependent Claims (2, 3, 4, 5)
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6. A pipe thrusting apparatus for inserting and removing a pipe from a borehole, comprising:
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a collar configured to releasably grip the pipe, the collar comprising a plurality of bladders circumferentially disposed around the collar, wherein the bladders are configured to move between inflated and deflated positions; a support frame; and a bi-directional driver coupled between the collar and the support frame, the driver configured to drive the collar toward and away from the borehole to insert and remove the pipe from the borehole. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A pipe thrusting apparatus for inserting and removing a pipe from a borehole, comprising:
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a collar configured to releasably grip the pipe, the collar comprising; at least one active gripping shoe configured to move a first distance between an engaged position and a disengaged position; and at least one passive gripping shoe opposite the active gripping shoe, the passive gripping shoe configured to move a second distance between an extended position and a retracted position, wherein the second distance is smaller than the first distance; a support frame; and a bi-directional driver coupled between the collar and the support frame, the driver configured to drive the collar toward and away from the borehole to insert and remove the pipe from the borehole. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A pipe thrusting apparatus for inserting and removing a pipe from a borehole, comprising:
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a collar configured to releasably grip the pipe; a support frame; and a bi-directional driver coupled between the collar and the support frame, the driver configured to drive the collar toward and away from the borehole to insert and remove the pipe from the borehole, wherein the support frame comprises a crossbeam extending laterally across the support frame and extending outward therefrom. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 28, 29)
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27. The pipe thrusting apparatus of 20, wherein the at least one support member comprises a plurality of pilings extending obliquely into the ground.
Specification