US 11,988,071 B2
Drill string-connected protection from borehole pulsation energies
John Thomas Rogers, Garland, TX (US); and Cersten Jantzon, Kingwood, TX (US)
Assigned to Performance Pulsation Control, Inc., Richardson, TX (US)
Filed by Performance Pulsation Control, Inc., Richardson, TX (US)
Filed on Dec. 29, 2021, as Appl. No. 17/646,459.
Claims priority of provisional application 63/131,727, filed on Dec. 29, 2020.
Prior Publication US 2022/0205324 A1, Jun. 30, 2022
Int. Cl. E21B 21/08 (2006.01); E21B 4/02 (2006.01); E21B 17/18 (2006.01)
CPC E21B 4/02 (2013.01) [E21B 17/18 (2013.01); E21B 21/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A pulsation dampening device for connection to a drill string, the pulsation dampening device comprising:
an internal flow path extending through an axial length of a body of one of a top drive or a saver sub; and
a disruptive feature within the internal flow path, the disruptive feature comprising an orifice oriented to attenuate fluid pressure pulses emanating from downhole tools.