Pipeline servicing tool
First Claim
1. The pipeline servicing tool arranged to be pulled through a pipeline and arranged for connection to a pressured liquid source, said tool comprising(a) a fluid driven motor assembly having leading and trailing ends and having a drive portion,(b) connector means on said motor assembly for moving it through a pipe to be cleaned,(c) an exterior tubular housing on said motor assembly arranged to be driven rotatably on said motor assembly by fluid pressure,(d) said housing having an open leading end into which said connector means extends for securement to said motor assembly,(e) said leading end comprising a circular toothed cutting edge,(f) fluid transmitting means connected to said motor assembly for admitting pressured liquid to said motor assembly from a pressured liquid source,(g) said cutting edge being dimensioned and arranged to clear a path through a pipe larger in diameter than trailing portions of said motor assembly.
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Accused Products
Abstract
A liquid operated motor assembly has an exterior housing arranged to be driven rotatably by fluid pressure. The exterior housing has a cutter at its leading end which is dimensioned and arranged to clear a path through a pipe at least as large in cross section as trailing portions of the motor assembly. The motor assembly is connected at its trailing end to radially expandable links arranged when expanded to engage the inner surface of a pipe and stabilize the position of the motor assembly and arranged when retracted to allow retrieval of the tool through a bore made by the cutter. Operation of the expanding links is accomplished by a fluid operated cylinder assembly in the same circuit as the motor whereby to be expanded when the motor is in operation. Fluid supply for the motor includes forwardly directed orifices that clean debris away from the front of the tool. The discharge outlet for the motor is located within the cutter housing so that discharged fluid cools the cutter.
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Citations
9 Claims
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1. The pipeline servicing tool arranged to be pulled through a pipeline and arranged for connection to a pressured liquid source, said tool comprising
(a) a fluid driven motor assembly having leading and trailing ends and having a drive portion, (b) connector means on said motor assembly for moving it through a pipe to be cleaned, (c) an exterior tubular housing on said motor assembly arranged to be driven rotatably on said motor assembly by fluid pressure, (d) said housing having an open leading end into which said connector means extends for securement to said motor assembly, (e) said leading end comprising a circular toothed cutting edge, (f) fluid transmitting means connected to said motor assembly for admitting pressured liquid to said motor assembly from a pressured liquid source, (g) said cutting edge being dimensioned and arranged to clear a path through a pipe larger in diameter than trailing portions of said motor assembly.
Specification