Top pot assembly
AssigneePruitt Tool & Supply Co.
InventorsGrant Pruitt, Cris Braun
Life of this patent
Estimating the term…
Abstract
An improved top pot assembly utilizes an attachment body for attaching the rubber to a bearing assembly for rotation with the inner barrel. The attachment body simplifies the replacement of the rubber on the drilling assembly. The attachment body provides a guide that slopes downward into the central aperture and the bore to guide the mandrel and drilling string towards the bore. The attachment body also provides a stripper receiver for attachment of the rubber to the attachment body. The attachment body attaches to the housing which attaches to the bearing assembly for rotation of the rubber and the inner barrel.
Claims20
An apparatus for securing a rubber within a rotating housing of a drilling assembly, the housing configured to accept a drilling string passing through the housing along a vertical axis, the apparatus comprising:
- an attachment body configured to attach to the housing to secure the rubber within the housing;
- a central aperture of the attachment body configured for passage of the drilling string vertically through the attachment body;
- an outer fastener aperture located radially outward from the central aperture a first distance;
- the outer fastener aperture configured to accept at least one fastener to attach the attachment body to the housing;
- an inner fastener aperture located on a bottom surface of the attachment body, the inner fastener aperture located radially outward from the central aperture a second distance, wherein the second distance is less than the first distance;
- wherein the inner fastener aperture is configured to accept a fastener that directly contacts the rubber to limit rotation of the rubber;
- wherein the inner fastener aperture extends upward from the bottom surface of the attachment body, wherein the inner fastener aperture terminates within the attachment body.
An apparatus for securing a rubber within a rotating housing of a drilling assembly, the housing configured to accept a drilling string passing through the housing along a vertical axis, the apparatus comprising:
- an attachment body configured to attach to the housing to secure the rubber within the housing;
- a central aperture of the attachment body configured for passage of the drilling string vertically through the attachment body;
- an outer fastener aperture located radially outward from the central aperture a first distance;
- the outer fastener aperture configured to accept at least one fastener to attach the attachment body to the housing;
- an inner fastener aperture located radially outward from the central aperture a second distance, wherein the second distance is less than the first distance, wherein the inner fastener aperture is configured to accept at least one fastener to secure the rubber with the attachment body;
- a sealing lip protruding vertically downward from a bottom surface of the attachment body, wherein the sealing lip protrudes downward radially outward from the central aperture to directly contact the rubber, wherein no portion of the sealing lip is located at an interior radial edge of the rubber.
An apparatus for securing a rubber within a rotating housing of a drilling assembly, the housing configured to accept a drilling string passing through the housing along a vertical axis, the apparatus comprising:
- an attachment body configured to attach to the housing to secure the rubber within the housing;
- a central aperture of the attachment body allowing passage of the drilling string vertically through the attachment body;
- an outer fastener aperture located radially outward from the central aperture a first distance, the outer fastener aperture configured to accept at least one fastener to attach the attachment body to the housing;
- an inner fastener aperture located radially outward from the central aperture a second distance, wherein the second distance is less than the first distance, wherein the inner fastener aperture is configured to accept at least one fastener to secure the rubber with the attachment body;
- a seal receiver configured to seat a seal radially outward from the inner fastener aperture at a vertical height that overlaps on the vertical axis with the inner fastener aperture, wherein the seal receiver extends vertically downward below the outer fastener aperture.
Dependencies are inferred from the claim text.