Self sealing jetting valve
AssigneeZentech, Inc.
InventorsKevin Alan McDoneld, William David Reynolds, Jr., Ramesh Maini
Life of this patent
Estimating the term…
Abstract
An apparatus for use in marine platform jacking is disclosed herein. In one aspect, a jetting valve includes a valve body with a piston assembly disposed therein. The piston assembly is selectively operated to open and close the valve. A biasing member is coupled to the piston assembly. The piston assembly includes a first piston and a second piston. The dual pistons, in cooperation with the biasing member, allow the valve to self-seal thereby preventing entry of a fluid which is external to the valve.
Claims19
A jetting valve for a seabed operation, comprising:
- a valve body including a port, a bottom surface, and an inner chamber;
- and
- a piston assembly moveable from a retracted position to an extended position including:
- a shaft moveably disposed in the port, the shaft including a first end and a second end;
- a first piston disposed in the inner chamber and disposed between the first end and the second end of the shaft;
- and
- a second piston disposed at the second end of the shaft, wherein the second piston blocks the port in the retracted position and unblock the port in the extended position, and wherein the second piston and second end of the shaft protrude from the bottom surface of the valve body in the extended position.
A jetting valve for a seabed operation, comprising:
- a valve body including a port, a first volume, and a second volume;
- and
- a piston assembly disposed in the valve body and moveable between a retracted position and an extended position, wherein fluid communication is allowed between the first volume and the second volume and fluid communication is allowed between the second volume and an exterior of the valve body when the piston assembly is in the extended position, wherein the piston assembly includes:
- a first piston configured to isolate the first volume from the second volume in the retracted position;
- and
- a second piston configured to seat against the port in the retracted position to isolate the second volume from the exterior of the valve body.
An offshore rig operation, comprising:
- increasing fluid pressure in a jetting valve coupled to a spud can to extend a piston assembly into a seabed to open a port;
- flowing fluid through the port to dislodge a soil of a seabed from the spud can;
- and lifting the spud can from the seabed.
Dependencies are inferred from the claim text.