US PATENT SUBCLASS 166 / 77.51
.~ With means facilitating connecting or disconnecting supported tubing or rod sections


Current as of: June, 1999
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166 /   HD   WELLS

75.11  DF  ABOVE GROUND APPARATUS {25}
77.51.~ With means facilitating connecting or disconnecting supported tubing or rod sections {2}
77.52  DF  .~.~> With elevator detail
77.53  DF  .~.~> Upper and lower slips


DEFINITION

Classification: 166/77.51

With means facilitating connecting or disconnecting supported tubing or rod sections:

(under subclass 75.11) Above ground apparatus comprising a separate apparatus for effecting the make-up or break-up of discrete pieces of thin-walled pipe or tubular bar in a line being inserted or removed from the well.

(1) Note. The devices classifiable in this subclass must be specifically described as performing one of the following functions during the connecting or disconnecting operation (a) rotate one section of rod or pipe, (b) hold one section

of rod or pipe stationary or (c) temporarily support a section of rod or pipe.

(2) Note. The separate apparatus under this definition must be normally separate from the device being assembled or disassembled and must be something more than a mere detachable section of pipe constituting a continuation of the line of pipe being handled.

(3) Note. A mere guide for aligning a rod or pipe section to be connected or disconnected from another without supporting the section is excluded from this subclass and will be found below in subclass 85.1.

SEE OR SEARCH THIS CLASS, SUBCLASS:

78.1, for apparatus for rotating a tubing extending into a well.

85.1, for above ground apparatus for assembling or disassembling other well apparatus. 377+, for a process of disassembling a well part.

378+, for a process of assembling a well part.

SEE OR SEARCH CLASS

81, Tools,

52+, for a wrench or screwdriver, subclasses 54+ for a mechanically operated type and especially subclasses 57+ for use in well operations (pipe tongs).

173, Tool Driving or Impacting,

164, for means to drive a tool about an axis and having means to hold and relatively rotate tool shaft sections.

175, Boring or Penetrating the Earth,

170+, for similar apparatus combined with a rotary drive for an earth boring tool.

414, Material or Article Handling,

22.51+, for well pipe or rod racking mechanism.