The Die Collar is an external catch fishing tool designed to retrieve tubular members from the well bore.

Construction:

The Die Collar is manufactured from high grade alloy and specially heat treated. The hardened cutting teeth (wickers) are machined on a shallow taper (approximately 3/4 inch per foot) to provide an excellent grip and positive engagement. Plain water-tight wicker's are furnished as standard equipment. Fluted wickers are also available on request. Die Collars are available with plain, lipped, or mill type bottom, or with threaded bottom for attaching a standard lipped or oversized guide.

Assembly and Operation

Assemble the Die Collar to the bottom of the fishing string. Run in the hole until reaching the fish. Apply minimum weight (less than one point) and rotate sufficiently to allow the wicker threads to become embedded in the exterior surface of the fish. Caution: be careful not to apply excessive weight or to rotate excessively. This could cause damage to the wickers. Once the fish has been securely engaged, it can be lifted from the hole.

Type	Joint Thread	mm(in) Fishing Range
MZ/NC26	NC26	48(1 7/8)~50(2)
MZ/NC26	NC26	59(2 5/16)~60(2 3/8)
MZ/NC26	NC26	68(2 4/9)~73(2 7/8)
MZ/NC31	NC31	69(2 3/4)~73(2 7/8)
MZ/NC31	NC31	71(2 4/5)~82(3 1/4)
MZ/NC31	NC31	89(3 1/2)~93(3 5/8)
MZ/NC38	NC38	95(3 3/4)~118(4 5/8)
MZ/NC38	NC38	90(3 9/16)
MZ/NC50	NC50	127(5)
MZ/4 1/2″FH	4 1/2″FH	120(4 3/4)
MZ/4 1/2″FH	4 1/2″FH	141(10 1/5)
MZ/6 5/8″REG	6 5/8″REG	168(6 5/8)