US 10,890,175 B2
Direct drive pumping unit
Benson Thomas, Pearland, TX (US); Jeffrey John Lembcke, Cypress, TX (US); William Kevin Hall, Katy, TX (US); Clark E. Robison, Tomball, TX (US); and Sean M. Christian, Fort Howard, MD (US)
Assigned to Weatherford Technology Holdings, LLC, Houston, TX (US)
Filed by Weatherford Technology Holdings, LLC, Houston, TX (US)
Filed on Apr. 8, 2019, as Appl. No. 16/378,038.
Application 16/378,038 is a division of application No. 15/011,330, filed on Jan. 29, 2016, granted, now 10,400,761.
Claims priority of provisional application 62/109,144, filed on Jan. 29, 2015.
Claims priority of provisional application 62/112,250, filed on Feb. 5, 2015.
Claims priority of provisional application 62/114,892, filed on Feb. 11, 2015.
Claims priority of provisional application 62/121,821, filed on Feb. 27, 2015.
Prior Publication US 2019/0234400 A1, Aug. 1, 2019
Int. Cl. F04B 47/02 (2006.01); F04B 49/20 (2006.01); E21B 43/12 (2006.01); F04B 47/14 (2006.01); F04B 17/03 (2006.01); F04B 19/22 (2006.01)
CPC F04B 49/20 (2013.01) [E21B 43/121 (2013.01); E21B 43/127 (2013.01); F04B 17/03 (2013.01); F04B 19/22 (2013.01); F04B 47/02 (2013.01); F04B 47/022 (2013.01); F04B 47/026 (2013.01); F04B 47/14 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A direct drive pumping unit, comprising:
a reciprocator for reciprocating a sucker rod string and comprising:
a tower for surrounding a wellhead;
a polished rod connectable to the sucker rod string and having an inner thread open to a top thereof and extending along at least most of a length thereof;
a screw shaft for extending into the polished rod and interacting with the inner thread; and
a motor mounted to the tower, torsionally connected to the screw shaft, and operable to rotate the screw shaft relative to the polished rod; and
a sensor for detecting position of the polished rod.