US 11,753,901 B2
Fluid pulse generation in subterranean wells
Roger L. Schultz, Newcastle, OK (US); Andrew M. Ferguson, Moore, OK (US); Timothy Manke, Oklahoma City, OK (US); and Brett A. Fears, Mustang, OK (US)
Assigned to THRU TUBING SOLUTIONS, INC., Newcastle, OK (US)
Filed by THRU TUBING SOLUTIONS, INC., Newcastle, OK (US)
Filed on Mar. 5, 2021, as Appl. No. 17/193,249.
Claims priority of provisional application 63/036,787, filed on Jun. 9, 2020.
Claims priority of provisional application 62/985,399, filed on Mar. 5, 2020.
Prior Publication US 2021/0277743 A1, Sep. 9, 2021
Int. Cl. E21B 34/06 (2006.01); E21B 43/12 (2006.01)
CPC E21B 34/06 (2013.01) [E21B 43/121 (2013.01)] 31 Claims
OG exemplary drawing
 
1. A fluid pulse generator for use with a subterranean well, the fluid pulse generator comprising:
a fluid motor including a rotor configured to rotate in response to fluid flow through the fluid motor;
a variable flow restrictor positioned upstream of the fluid motor, the variable flow restrictor including a restrictor member rotatable by the rotor relative to a ported member to thereby variably restrict the fluid flow; and
the restrictor member being longitudinally displaceable relative to the rotor during operation of the fluid pulse generator, in which a variable length connection transmits rotation and torque from the rotor to the restrictor member, and in which the variable length connection comprises a splined connection.