The releasing and Circulating Overshot is an external catch fishing tool designed to retrieve tubular items from the well bore. It is rugged, economical, and easy to use. DX overshots come with a wide range of available accessories. This fishing tools have proven to be the most versatile and reliable in the field.

Construction:

The basic assembly consists of a top sub, bowl, and standard guide. The internal components are used to establish a secure grip on the fish to retrieve it easily. The selection of these components is determined by the diameter of the fish to be retrieved. When the fish diameter approaches the maximum catch of the overshot, a spiral grapple is required. This must also be equipped with a spiral grapple control and type A packer. When the diameter is approximately1/2inch (or more) under the maximum catch of the overshot, a basket grapple is used. It must be assembled with either a basket grapple control or a mill control packer.

Assembly and Operation:

Spiral Catch Equipment-Place the type A packer (with inside lip pointed up) in overshot bowl between upper thread and helix. (note: the lower end of overshot bowl has a longitudinal slot cut into helix.) Assemble top sub to overshot bowl. Thread spiral grapple into left-hand helix in overshot bowl. Stop threading when the grapple has fully entered the helix and the grapple tang has aligned with the keyway in the bowl. Slid the grapple control, tang end first, into overshot bowl until the grapple control tang slides beside tang on grapple. Grapple tang also slides into slot in grapple control. Now assemble the guide to overshot bowl.

Type	O.D (mm)	Max Size of Fish(mm)		API Connection
		Spiral Grapple	Basket Grapple
LT-T89	89	60.3	47.6	NC26
LT-T92	92	73	63.5	NC26
LT-T95	95	76.2	66.6	NC26
LT-T102	102	73	60.3	NC26
LT-T105	105	85.7	73	NC31
LT-T114	114	89	75	NC31
LT-T117	117	89	78	NC31
LT-T127	127	95	80	NC38
LT-T143	143	120.6	102	NC38
LT-T152	152	128	111	NC38
LT-T168	168	127	114	NC50
LT-T168B	168	139.7	120.6	NC50
LT-T181	181	146	127	NC50
LT-T194	194	159	141	NC50
LT-T200	200	159	141	NC50
LT-T206	206	178	163	NC50
LT-T206A	206	168	152	NC50
LT-T219	219	178	159	NC50
LT-T232	232	203	187	NC50
LT-T244	244	206	184	6 5/8 REG
LT-T260	260	219	200	6 5/8 REG
LT-T270	270	228.6	209.6	6 5/8 REG
LT-T273	273	241.3	216	6 5/8 REG
LT-T286	286	244.5	225.4	6 5/8 REG
LT-T298A	298	257	238.1	6 5/8 REG
LT-T340	340	286	260	6 5/8 REG