US 12,221,846 B1
Linear grease and hydraulic valve for fracking system maintenance
Joseph Owen Beard, Fullerton, CA (US); Frode Sveen, Chino, CA (US); and Douglas W. Beard, Brea, CA (US)
Assigned to PacSeal Group, Inc., Brea, CA (US)
Filed by PacSeal Group, Inc., Brea, CA (US)
Filed on May 1, 2024, as Appl. No. 18/652,613.
Int. Cl. E21B 33/03 (2006.01); E21B 43/26 (2006.01)
CPC E21B 33/03 (2013.01) [E21B 43/2607 (2020.05)] 21 Claims
OG exemplary drawing
 
1. A fracking stack assembly coupled with a wellhead, the fracking stack assembly comprising:
a hydraulic pump and a motor for powering the hydraulic pump;
at least one lubricant reservoir for providing a flow of pressurized lubricant;
at least one conduit hydraulically coupling the hydraulic pump with the at least one lubricant reservoir, wherein the hydraulic pump pressurizes the flow of pressurized lubricant;
a fracking valve including a cavity within a body of the fracking valve;
a linear shear-flow controller configured to deliver the flow of pressurized lubricant to the fracking valve comprising:
a housing including an interior space;
a supply port receiving the flow of pressurized lubricant and including first and second apertures in the housing, a first ring holder disposed in the first aperture and a first seal ring coupled within the first ring holder, a second ring holder disposed in the second aperture and a second seal ring coupled within the second ring holder;
an outlet port, including a third aperture in the housing, a third ring holder disposed in the third aperture; and
a slide having a first end and a second end disposed within the interior space and movable along a linear axis, the slide including a first side and a second side opposite the first side, an inner passage and a center aperture extending through the slide between the first and the second end, the center aperture connected to a through port extending through the slide;
wherein the first side of the slide sealingly engages with the first seal ring, and the second side of the slide sealingly engages with the second seal ring, the slide slideable along the linear axis between blocked and open positions;
wherein in the blocked position of the slide, the center aperture is aligned between the supply port and outlet port and aligned along with the first and second seal rings, wherein the pressurized lubricant flows through the first and second seal rings and the inner passage; and
wherein in the open position of the slide, the center aperture is aligned with the supply port allowing the pressurized lubricant to enter a body-cavity through the through port and exit through the outlet port to form a flow path for the flow of pressurized lubricant to the cavity of the fracking valve.