Grant Prideco, Inc.

Thomas Edward Winship

Jackie E Smith

Gerald E Wilson

Makeup plates on the abutting surfaces of a tool joint pin and a tool joint box are provided. The makeup plates are recessed in a short distance from the outer diameter of the tool joint elements, such that when the joint is made up, the makeup plate develops an easily visible gap between the tool elements. In this way, a quick determination may be made, without measurement, as to whether the joint can be refaced, or require re-machining.

External refacing indicator for a tool joint

The oilfield tubular pin and box connection includes double shoulders . An inner sleeve engages the box at shoulder , and provides one of the two shoulders for engaging the pin. The pin bore optionally may be provided with a similar sleeve , thereby providing one of the shoulders for engaging the box. The sleeve may be secured to the box shortly after its manufacture, or may be added as a retrofit to an existing box with a single shoulder.

Double shoulder oilfield tubular connection

An ultra high torque double shoulder tool joint (see FIG. 1) for maximizing the torsional strength of a threaded connection by correlating a transverse cross-sectional counter-bore area of the box (12) and pin (10). The pin 10 includes a base section 74 and a nose section 24. The nose section 24 defines a cross-sectional nose area 28. The pin external threads 22 include a taper no greater than 1/12. The box 12 includes a cross-sectional counterbore area 46 and a cross-sectional box area 52. The overall strength of the tool joint is dependent upon the torsional strength of the threaded connection, the cross-sectional nose area (28) and the cross-sectional counter-bore area (46).

Growing community of inventors

College Station, TX, United States of America

Thomas Edward Winship