초록 ▼

A tubing head is provided for accommodating a rotator. The rotator includes a drive gear and a swivel tubing hanger which engages an internal surface of the tubing head and comprises a driven gear for engaging the drive gear. The tubing head defines a gear housing for the drive gear so that the driv

A tubing head is provided for accommodating a rotator. The rotator includes a drive gear and a swivel tubing hanger which engages an internal surface of the tubing head and comprises a driven gear for engaging the drive gear. The tubing head defines a gear housing for the drive gear so that the drive gear may releasably engage the driven gear. The internal surface, gear housing and drive and driven gears are configured such that when the drive gear is in the gear housing, the tubing hanger engages the internal surface and the drive and driven gears are engaged, the tubing hanger may be removed from the tubing head by pulling it through the upper end without first disengaging the drive and driven gears. An apparatus is also provided comprising the tubing head, the swivel tubing hanger and the drive gear.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A tubing head for accommodating a tubing rotator therein, the tubing head being of the type having an upper end, a lower end for attachment to a wellhead and an internal bore exten

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A tubing head for accommodating a tubing rotator therein, the tubing head being of the type having an upper end, a lower end for attachment to a wellhead and an internal bore extending between the upper and lower ends, wherein the tubing rotator comprises a drive gear and a swivel tubing hanger for rotatably suspending a tubing string contained within a wellbore, the tubing hanger comprising an external surface for engaging the internal bore of the tubing head such that the tubing hanger may be suspended thereby and a driven gear for engaging the drive gear, the improvement which comprises:(a) the internal bore of the tubing head defining an internal surface for engaging the external surface of the tubing hanger such that the tubing hanger may be suspended by the tubing head and wherein the internal bore of the tubing head further defines a minimum diameter of the bore; and(b) the tubing head defining a gear housing for containing the drive gear therein, wherein the gear housing communicates with the internal bore such that the drive gear may releasably engage the driven gear of the tubing hanger when the tubing hanger is suspended by the tubing head and wherein the gear housing is configured such that when the drive gear is contained within the gear housing, the drive gear does not protrude into the internal bore within the minimum diameter; rein the internal surface, the gear housing, the drive gear and the driven gear are configured such that when the drive gear is contained within the gear housing, the tubing hanger is located in the internal bore and the driven gear is engaging the drive gear, the tubing hanger is capable of being removed from the internal bore by pulling it through the upper end of the tubing head without first disengaging the drive gear from the driven gear.