Patent ID: 6095259
Filing Date: 2000-08-01
Classification: E21B,Y10T

Abstract:
A core sampler apparatus for collecting subterranean core samples with a drilling rig having a drill string, the core sampler comprising:a barrel assembly having a passageway for receiving deposition of the core sample, the barrel assembly having a tang portion extending from an upper end thereof, and wherein the barrel assembly is split along a longitudinal axis into a first half-portion and a second half-portion, wherein the half portions are matingly engaged by the engagement of a tab of the first portion matingly engaging a groove of the second half portion;a shoe attached to a lower end of said barrel assembly with an opening contiguous with the passage way of said barrel assembly, the first and second half portions of the barrel assembly having a spiral thread which, when the first and second half portions are matingly engaged, is threadingly engaged by the shoe; anda connector member attached to the upper end of said barrel assembly and attached to the drill string, the connector member having a bore with a characteristically close fitting relationship to the tang portion of the barrel assembly, the connector member having a first aperture, and the tang portion having a second aperture, and wherein a pin has a first portion disposed in said first aperture and simultaneously has a second portion disposed in said second aperture to pinningly engage the tang portion to the connector member, and wherein the connector member has a sliding sleeve moveable between a locked and an unlocked position, where in the locked position the sliding sleeve covers the first aperture of the connector member to retain the pin therein; andwherein the connector member has a channel longitudinally extending from an upper shoulder to a lower shoulder, the channel supporting the sliding sleeve between the locked and unlocked positions.