Load compensator for a pipe running tool
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 17, 2004
Grant Date -
Apr 18, 2002
app pub date -
Sep 14, 2001
filing date -
Mar 5, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A load compensator is disclosed for use in connection with a pipe running tool. The load compensator includes an outer housing connected to the portion of the pipe running tool that holds the pipe segment. A piston is disposed within the housing, and is connected to a top drive system of the pipe running tool. The housing is formed with a first port through which pressurized air is delivered inside the housing to drive the piston within the housing. A second port is disposed at a selected location on the housing, such that when the piston is advanced past the second port, pressurized air passes through the port, and causes the control circuit to stop delivering air through the first port. Once pressurized air no longer flows through the second port, the control circuit causes air to be delivered to the first port.
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