US 11,988,329 B1
Grease delivery with accumulated pressure
Balazs Horvath, Spring, TX (US); and Charles W. Bedford, Houston, TX (US)
Assigned to ZP INTERESTS, LLC, Spring, TX (US)
Filed by ZP Interests, LLC, Spring, TX (US)
Filed on Jul. 21, 2022, as Appl. No. 17/870,364.
Claims priority of provisional application 63/224,031, filed on Jul. 21, 2021.
Int. Cl. F16N 13/22 (2006.01); E21B 43/26 (2006.01); F16N 11/10 (2006.01); F16N 25/00 (2006.01)
CPC F16N 11/10 (2013.01) [E21B 43/2607 (2020.05); F16N 25/00 (2013.01); F16N 2280/02 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method for greasing a wellhead component with a grease delivery with accumulated pressure system, the method comprising:
supplying grease from a grease reservoir to a grease accumulator at a first pressure, the grease accumulator coupled to a greasing manifold through a discharge conduit, and the greasing manifold connected to the wellhead component through a delivery conduit;
applying, with a hydraulic accumulator, a second pressure to the grease in the grease accumulator; and
opening a valve in the discharge conduit permitting the grease to flow under pressure from the grease accumulator to the wellhead component;
wherein a plurality of local stations, each of which comprises a local grease accumulator, a local hydraulic accumulator, and a local greasing manifold;
the local stations located proximate to a respective local wellhead tree comprising wellhead components connected to the respective local greasing manifold; and
the grease reservoir located at a remote station removed from the local stations and connected through a first manifold to the local grease accumulators, wherein the remote station is located outside of a zone in which people are excluded during fracturing operations, wherein the local stations are located inside of the zone.