US 11,946,338 B2
Sleeve control valve for high temperature drilling applications
Ryan Damont Green, League City, TX (US); Sebastian Tegeler, Hannover (DE); Andreas Peter, Celle (DE); and Thomas Kruspe, Wietzendorf (DE)
Assigned to BAKER HUGHES, A GE COMPANY, LLC, Houston, TX (US)
Filed by Baker Hughes, Houston, TX (US)
Filed on Jun. 1, 2020, as Appl. No. 16/889,063.
Application 16/889,063 is a continuation in part of application No. 15/066,389, filed on Mar. 10, 2016, granted, now 10,669,812.
Prior Publication US 2020/0291743 A1, Sep. 17, 2020
Int. Cl. E21B 34/06 (2006.01); E21B 34/14 (2006.01); E21B 47/18 (2012.01)
CPC E21B 34/066 (2013.01) [E21B 34/14 (2013.01); E21B 47/18 (2013.01); E21B 2200/06 (2020.05)] 20 Claims
OG exemplary drawing
 
19. A method of operating a control valve assembly in a wellbore comprising:
activating a solenoid to create a magnetic field in a magnetic circuit having a gap;
passing the magnetic field across the gap in the magnetic circuit; and
sliding a sleeve mounted to a body with the magnetic field thereby narrowing the gap, the sleeve sliding from a first position covering one of a fluid inlet and a fluid outlet to a second position uncovering one of the fluid inlet and the fluid outlet to produce a pressure pulse in the wellbore, wherein the body is formed from a first magnetic material, and wherein at least a portion of the sleeve is made from a second magnetic material.