US PATENT SUBCLASS 166 / 255.3
.~.~.~.~ Using whipstock

Current as of: June, 1999
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166 /   HD   WELLS

244.1  DF  PROCESSES {39}
250.01  DF  .~ With indicating, testing, measuring or locating {21}
255.1  DF  .~.~ Determining position of object in well {1}
255.2  DF  .~.~.~ Tool orienting {1}
255.3.~.~.~.~ Using whipstock

DEFINITION

Classification: 166/255.3

Using whipstock:

(under subclass 255.2) Tool orienting wherein the device is for diverting a pipe, tubing, or a well tool.

SEE OR SEARCH THIS CLASS, SUBCLASS:

117.5+, for whipstock apparatus in general.

SEE OR SEARCH CLASS

175, Boring or Penetrating the Earth,

61, for methods and subclasses 79+ for apparatus of drilling using a whipstock.