William H Tinsley

US Patent:

43601863, Nov 23, 1982

Filed:

Nov 10, 1980

Appl. No.:

6/205096

Inventors:

William B. Tinsley - Irving TX
C. Richard Bacon - Irving TX

International Classification:

E21B 3306
E16L 2706

US Classification:

251 1B

Abstract:

A Swivel Joint for use on producing wells which are being pumped, having an upper and a lower annular member, in juxtaposition, with a coil spring separating the members, the lower member having a curved external face to receive, in line contact, the inside wall of the retaining member, which is engaged with the upper member, and having a packing chamber and a packing nut having one end extending into said packing chamber, and a grease chamber in said packing nut, and packing members mounted in said packing chamber compressed by one end of said packing nut. A blow out preventer is mounted on the lower member having a collapsible packing retainer in which a flexible packing is mounted, said retainer being maintained normally in inactive position, with means for moving said packing into active position to seal off the annulus between the sucker rod and the inside wall of the lower annular member to permit repacking of the packing gland, or to act as a blowout preventer, said packing retainer retracting the packing material when the activating means is moved to inactive position.