Well tool and method of use therefor
Patent
·
OSTI ID:7080389
A percussion drill is described which facilitates the removal of impediment in a well bore or well tubing. The tool is connected to the lower end of a fluid supply line. The tool is constructed of a housing, a tubular stem telescopically received by the housing for relative reciprocal movement in response to fluid pressure communicated to the housing through the supply line, a working element attached to one end of the stem for movement therewith, and a valve assembly carried by the housing and responsive to predetermined movement of the stem relative to the housing to relieve fluid pressure within the tool, permitting a return of the stem and housing to their initial position relative to each other. In the method, the tool is attached to the end of a fluid supply line and inserted into a well conduit, the continuous supply line is inserted into the conduit until the tool reaches a preselected level, the tool is operated by applying fluid pressure thereto through the supply line and the supply line is further fed into the conduit as the tool advances through the conduit. When the working element engages a firm obstruction, the housing and tubing are repeatedly reciprocated relative to the stationary bit imparting hammering blows. (17 claims)
- Assignee:
- Brown Equip Serv Tools Inc
- Patent Number(s):
- US 3946819
- OSTI ID:
- 7080389
- Country of Publication:
- United States
- Language:
- English
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