Releasing and Circulating Overshot

LT Overshot is one of the fishing tools which is fishing the pipes externally. It can catch drill collar, drill pipe, tubing, subs and other pipes. Because of the seals, the fluid can circulate with the high pump pressure after catching the fish. The top of the fish will be milled by under mill shoe. It can also work with jars to catch the stuck fishes. If the catched fish can't be release from stucking, we should release the overshot and lifting the drill string.

Type	O.D. of overshot mm(inch)	MAX. Catch Sizes mm(inch)		Conn.
Type	O.D. of overshot mm(inch)	spiral grapple mm(inch)	basket grapple mm(inch)	Conn.
LT-T324	324(12-3/4)	282.6(11-1/8)	266.7(10-1/2)	6-5/8REG
LT-T298	298(11-3/4)	257.2 (10-1/8)	228.6(9)	6-5/8REG
LT-T270	270(10-5/8)	228.6(9)	203.2(8)	6-5/8REG
LT-T206	206(8-1/8)	177.8(7)	159(6-1/4)	NC50
LT-T200	200(7-7/8)	171.5(6-3/4)	155.6(6-1/8)	NC50
LT-T146	146(5-3/4)	117.5(4-5/8)	108(4-1/4)	NC38
LT-T143	146(5-5/8)	120.7(4-3/4)	108(4-1/4)	NC38
LT-T102	102(4)	77.8(3-1/16)	65(2-9/16)	NC26

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