Handling: hand and hoist-line implements – Grapple – Well type
Reexamination Certificate
2008-09-23
2008-09-23
Kramer, Dean J (Department: 3652)
Handling: hand and hoist-line implements
Grapple
Well type
C294S086290, C294S086330, C294S086170
Reexamination Certificate
active
11218144
ABSTRACT:
Disclosed is an improved spear head overshot. The spear head overshot is particularly useful as part of a cable-guided fishing assembly. The spear head overshot essentially comprises one or more pivot lugs, the pivot lugs comprising jaw sections and release point sections, an actuator slide, a wave spring, a pivot mandrel, a screw attached to the pivot mandrel, and a compression spring threaded over the screw. In operation, a spear head is inserted into the spear head overshot until the spear head passes the jaw sections of the pivot lugs, at which time the spear head is locked into place. To release the spear head, the release point sections of the pivot lugs are manually forced inward. Simultaneously, the jaw sections of the pivot lugs are forced outward, thereby allowing the spear head to be removed from the spear head overshot. In a cable-guided fishing operation, this process can be repeated as often as necessary.
REFERENCES:
patent: 1587790 (1926-06-01), Morton
patent: 1602134 (1926-10-01), Triplett
patent: 1801456 (1931-04-01), Pryor
patent: 2266873 (1941-12-01), Lang
patent: 2507127 (1950-05-01), True
patent: 2508285 (1950-05-01), Otis et al.
patent: 2605131 (1952-07-01), Marshall et al.
patent: 4004835 (1977-01-01), Taylor
patent: 4515403 (1985-05-01), Cheek
patent: 6196309 (2001-03-01), Estilette, Sr.
patent: 6719052 (2004-04-01), Harmon et al.
patent: WO02/092960 (2002-11-01), None
Joe DeGeare, David Haughton, Mark McGurk, The Guide to Oilwell Fishing Operation.
Gulf Publishing Company, Oilwell Fishing Operations: Tools and Techniques, Aug. 1990.
Gunn Wireline, Wireline Tools.
National Oilwell, Cable Guided & Side Door Fishing Methods, 2004.
PCT International Search Report and Written Opinion for PCT/US2006/031376, dated Apr. 26, 2007.
Bosley Gregg A.
Isaacks C. Steven
Ross David P.
Streater, Jr. James R.
Howrey LLP
Kramer Dean J
National-Oilwell DHT, L.P.
LandOfFree
Spear head overshot for use in a cable guided fishing assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Spear head overshot for use in a cable guided fishing assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spear head overshot for use in a cable guided fishing assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3926126