Tool driving or impacting – With vehicle support for drive – Drive structure moved to nonuse position for transport
Reexamination Certificate
2006-02-07
2006-02-07
Huynh, Louis K. (Department: 3721)
Tool driving or impacting
With vehicle support for drive
Drive structure moved to nonuse position for transport
C173S001000, C173S024000
Reexamination Certificate
active
06994171
ABSTRACT:
A method of self-aligning connections for a two section mast. The method includes the steps of transporting the elongated bottom mast section to a guide frame adjacent to a well site, the bottom mast section having a pair of front legs and a pair of rear legs. An elongated top mast section is transported to the well site, the top mast section having a pair of front legs and a pair of rear legs. The legs of the bottom mast section are positioned slightly below a level of the legs of the top mast section. Thereafter, the bottom mast section is raised slightly to order to engage the top mast section while simultaneously aligning the mast sections together. The sections are thereafter pinned together.
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Orr Alan
Trevithick Mark
Head Johnson & Kachigian
Helmerich & Payne, Inc.
Huynh Louis K.
Weeks Gloria R.
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