Elastomeric guard seal for tubular connections

摘要

A tubular connection comprising a pin end and a box end of adjacent joints having a conical metal-to-metal seal located with respect to the pin end forward thread set and its nose, the improvement of a circumferential groove in the pin end forward of the metal-to-metal seal which carries an elastomeric sealing ring radially extending beyond the limits of the groove. The metal-to-metal makeup of the connection causes by conical deformation a slight wedge shape opening to form forward of the metal-to-metal seal. The elastomeric material extrudes to fill this wedge shape opening to thereby form a compound seal forward of the metal-to-metal seal.