Wells – Processes – Freeing stuck object – grappling or fishing in well
Reexamination Certificate
2007-09-11
2007-09-11
Bagnell, David (Department: 3672)
Wells
Processes
Freeing stuck object, grappling or fishing in well
C166S178000, C175S293000, C173S202000
Reexamination Certificate
active
10757254
ABSTRACT:
A wireline jar tool delivers instrument packages into wellbores and retrieves tools when they get stuck. The jar has several stored spring chambers connected to accelerate an upper spring chamber away from a stuck lower carrier chamber that supports instrument packages. Wireline tension actuates the jarring action and then lowers a sinker bar for reset as many times as required to incrementally jar the un-stick fish uphole. The wire line connects to a conductor that extends inside the tool through a main operating shaft, release coupling, hammer and anvil, lost motion coupling, into the lower chamber where the end connects to the instruments for communication to the surface. A small wireline tension provides unexpected large impact forces.
REFERENCES:
patent: 2144869 (1939-01-01), Boulter
patent: 2706616 (1955-04-01), Osmun
patent: 2739654 (1956-03-01), Kinley et al.
patent: 4508174 (1985-04-01), Skinner et al.
patent: 4646830 (1987-03-01), Templeton
patent: 4736797 (1988-04-01), Restarick, Jr. et al.
patent: 4844157 (1989-07-01), Taylor
patent: 4846273 (1989-07-01), Anderson et al.
patent: 4919219 (1990-04-01), Taylor
patent: 4921438 (1990-05-01), Godfrey et al.
patent: 5069282 (1991-12-01), Taylor
patent: 6481495 (2002-11-01), Evans
patent: 6502638 (2003-01-01), Stoesz
patent: 2002/0104380 (2002-08-01), Brewer
patent: 2002/0112866 (2002-08-01), Buyers et al.
patent: 2004/0188085 (2004-09-01), Tillett, Jr.
patent: 2005/0092494 (2005-05-01), McElroy et al.
patent: 2005/0092495 (2005-05-01), Evans
Bagnell David
Bates Marcus L.
Stephenson Daniel P
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