Patent ID: 6189617
Filing Date: 2001-02-20
Classification: E21B

Abstract:
An apparatus for capturing downhole contaminants through tubing in a well, comprising:an elongated body defining a chamber therein;at least one tubing segment releasably attached to said body without threading:said tubing segment having an open lower end adjacent from which an open ended tubular inlet tube extends longitudinally toward said chamber and defines an annular retention compartment around itself, said compartment extending to adjacent said lower end of said tubing segment;said compartment extendable without threading by an additional tubing segment having therein its own tubular inlet tube which connects without threading to said tubular inlet tube already supported from said tubing segment;a pressure-reduction device acting on said chamber to draw fluid laden with contaminants through said inlet tube and into said chamber for deposit of the contaminants in said retention compartment.