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US 10,883,627 B2Granted
Pipe loosening device and method
AssigneeTT Technologies, Inc.
InventorJohn A. Olander
Life of this patent
Estimating the term…
Abstract
A pipe loosening device and methods are shown. In one example, the pipe loosening device enables a method wherein a pipe to be replaced is deformed but not burst, and a portion of a sidewall of the pipe is forced outward into the surrounding soil to compact a local region of the surrounding soil and loosen the existing pipe. The pipe may then pulled from the ground along an axis of the pipe.
Claims18
A pipe loosening device, comprising:
- a deforming die, including:
- a cylinder portion sized with a cylinder diameter to fit closely within an inner diameter of a pipe to be replaced, the cylinder having a longitudinal axis;
- and
- one or more inserts coupled to a side of the cylinder portion, wherein the one or more inserts protrude from the cylinder portion by a distance, wherein the one or more inserts include two inserts on a same side of the cylinder portion, the two inserts spaced apart from one another along the longitudinal axis, and a central insert on a side of the cylinder portion opposite the two inserts, and located longitudinally between the two inserts.
1 more element
A pipe loosening device, comprising:
- a deforming die, including:
- a cylinder portion sized with a cylinder diameter to fit closely within an inner diameter of a pipe to be replaced, the cylinder having a longitudinal axis;
- one or more inserts coupled to a side of the cylinder portion, wherein the one or more inserts protrude from the cylinder portion by a distance, wherein the one or more inserts include two inserts on a same side of the cylinder portion, the two inserts spaced apart from one another along the longitudinal axis, and a central insert on a side of the cylinder portion opposite the two inserts, and located longitudinally between the two inserts;
- and
- a threaded connection on the cylinder portion that is adapted to couple to a directional drill rod section.
2 more elements
A pipe loosening system, comprising:
- a directional drill;
- one or more drill stem sections coupled to the directional drill;
- a deforming die coupled to a distal end of the one or more drill stem sections, including:
- a cylinder portion sized with a cylinder diameter to fit closely within an inner diameter of a pipe to be replaced, the cylinder having a longitudinal axis;
- and
- one or more inserts coupled to a side of the cylinder portion, wherein the one or more inserts protrude from the cylinder portion by a distance, wherein the one or more inserts include two inserts on a same side of the cylinder portion, the two inserts spaced apart from one another along the longitudinal axis, and a central insert on a side of the cylinder portion opposite the two inserts, and located longitudinally between the two inserts.
3 more elements
Dependencies are inferred from the claim text.