.~ Fluid head on tool shaft having lateral port and axial passage with seal for means reciprocable in the head
DEFINITION
Classification: 175/214
(under subclass 207) Apparatus comprising a tool shaft having a fluid head secured to the end thereof located above ground said head being provided with an axially extending passage which is intersected by a generally perpendicular passage extending from the axially extending passage to the exterior of the head, and having a seal located in the head which is adapted to cooperate with a means movable through the axial passage, or the perpendicular passage and one end of the axial passage.
(1) Note. Generally the means reciprocable in the head may consist of a core barrel, or a wire line for retrieving a core barrel.
SEE OR SEARCH CLASS
166, Wells,
84.1+, for a fluid head of the type classified in Class 166 having a seal for reciprocating member.
277, Seal for a Joint or Juncture, for a generic sealing means or process, 322+, for a seal for a well apparatus.
