.~ Freeing stuck object, grappling or fishing in well
DEFINITION
Classification: 166/301
(under subclass 244.1) A process for (1) releasing an object in the well from a condition which prevents it from being moved, (2) grappling for an object in the well or (3) retrieving a small, loose object from inside the well.
(1) Note. A process under part (1) of this definition must involve more than merely disconnecting two parts, severing a part so as to leave a stuck portion in the well and free the severed portion or unsetting a device like a packer; a special procedure must be used to free a member held fast in the well by a condition such as corrosion or cave-in of the formation. A process under part (2) of this definition relates to a process for using the grapple apparatus found in Class 294, Handling: Hand and Hoist-Line Implements, especially subclasses 86.1+; a process for merely affecting a pipe joint or coupling is not included, such process when used in a well being classifiable in subclass 315. A process under part (3) of the definition relates to a process for using the fishing means found in Class 294, especially subclasses 86.1+, or in Class 166, subclass 99.
SEE OR SEARCH THIS CLASS, SUBCLASS:
55+, for apparatus for separating a pipe section from an adjacent section at an unprepared point.
98, for apparatus comprising a grapple and a well anchored lifting means.
99, for apparatus with junk retrieving means. 178, for apparatus with jar means for releasing a stuck part.
297+, for a process of freeing a pipe section by separating it from an adjacent section at an unprepared point.
311+, for a process of cleaning which may be similar to a process in subclass 301 but not for freeing a stuck object, grappling or fishing in the well. For example, a process for bailing sand from a well would be classifiable in subclasses 311+ whereas a process for fishing, e.g., recovering a small discrete object from the well rather than a particulate mass of material, would be classifiable in subclass 301.
315, for a process of disconnecting parts, removing parts from a well or unsetting devices such as packers, no special releasing procedure being used because of caving, corrosion or the like.
SEE OR SEARCH CLASS
175, Boring or Penetrating the Earth,
293+, for apparatus comprising below ground hammer or impact means, including such means used to free a stuck object in a
well.
294, Handling: Hand and Hoist-Line Implements,
66.5, for a grapple comprising a magnet and subclasses 86.1+ for a well type grapple apparatus.
