초록 ▼

A test plug for testing the integrity of a pipe includes a blind flange for mating with a pipe flange, a compression mandrel having a conical recess, an expander having a conical surface which mates with the compression mandrel and an elastomeric annular seal positioned between the compression mandr

A test plug for testing the integrity of a pipe includes a blind flange for mating with a pipe flange, a compression mandrel having a conical recess, an expander having a conical surface which mates with the compression mandrel and an elastomeric annular seal positioned between the compression mandrel and the expander. Removeable compression rings of different sizes may be attached to the test plugs and used with different sizes of annular seals. The expander is actuated by a rod which extends through the compression mandrel and to the exterior of the test plug. Installation of the test plug isolates and seals an end portion of the pipe. Fluid under pressure may then be pumped into the isolated segment to test for pressure integrity.

대표청구항 ▼

1. An apparatus for sealing the inside of a pipe for isolating or testing the integrity of a portion of the pipe, said apparatus comprising:(a) a blind flange for mating with a flange attached to a proximal end of the pipe, said blind flange having a threaded inner bore; (b) a positioner comprising:

1. An apparatus for sealing the inside of a pipe for isolating or testing the integrity of a portion of the pipe, said apparatus comprising:(a) a blind flange for mating with a flange attached to a proximal end of the pipe, said blind flange having a threaded inner bore; (b) a positioner comprising: (i) an inner bore, a proximal end and a distal end; (ii) a hydrotest port in the proximal end which provides fluid communication of a pressuring fluid through the positioner; and (iii) a threaded exterior surface which engages the inner bore of the blind flange; (c) a compression mandrel having a proximal end, a distal end and an inner bore, wherein the proximal end engages the distal end of the positioner, the inner bore is continuous with the inner bore of the positioner, and the distal end comprises a conical recess and a removeable annular compression ring; (d) an expander core having a conical seal expanding surface and a removeable annular compression ring; (e) means for actuating the expander positioned within the inner bore of the positioner and the compression mandrel; and (f) an elastomeric annular seal which is circumferentially mounted on the expander cone and positioned between the compression rings.