gotco international
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gotco international 11410 Spring Cypress Rd - Tomball, Texas 77377 USA Sales 281 591 1874 Fax 281 999 4251 1 800 OVERSHOT

Die Collar

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


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 watertight 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.

Standard Components

A standard or oversized guide can be assembled to the bottom of the Die Collar, if it has been ordered with the optional lower thread. When the hole size is considerably larger than the diameter of the fish, there may be sufficient room for the Die Collar to pass alongside of the fish without engaging it. In this case, an oversized guide can be used to assure fish engagement and to properly guide the fish into the Die Collar.

Standard Die Collars are supplied with right-hand threads. Left-hand threads are available on request at no extra charge.

When extra long Die Collars (those having a catching range considerably larger than the standard sizes) are requested, it may be necessary to provide a two or three piece welded assembly. Ask your Gotco sales representative for expert advice on ordering.


For sizes, specifications, and ordering instructions download this page in PDF.

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