Interferece-fit stop collar and method of positioning a device on a tubular

摘要

A stop collar is assembled using a method including the steps of receiving a bore of a base having a set of fingers extending along an exterior of a tubular, receiving a bore of a sleeve onto the tubular adjacent the set of fingers, and receiving the sleeve onto the set of fingers in an interference-fit. In alternate embodiments, the base comprises a plurality of angularly distributed fingers and/or the base comprises a gap to permit conformance of the base to the tubular. A fingerless base may cooperate with one or more separate fingers to form a base. In an embodiment of the method, the sleeve may be thermally expanded prior to the step of receiving the sleeve onto the set of fingers. The sleeve may be heated to expand the bore prior to being received onto the set of fingers.

主权项

1. A stop collar comprising:
a base configured to be received on a tubular, the base comprising a base portion and a plurality of fingers extending in a first axial direction from the base portion, wherein the base defines a plurality of slots that separate the plurality of fingers circumferentially apart, and wherein at least one of the plurality of slots does not extend across the base portion; and a sleeve configured to be received onto the plurality of fingers such that an inner diameter of the sleeve increases and the sleeve forms an interference fit with the plurality of fingers, wherein, when the sleeve is received onto the plurality of fingers, an elasticity of the sleeve causes the sleeve to apply a gripping force to the plurality of fingers.