초록 ▼

A chemical injection pump for injecting chemicals into subsea system at depths up to 10,000 feet is described which uses a minimum of moving parts by employing an actuator, for instance a solenoid, to power a double acting actuator rod and plungers thereon. The pump would generate low pressures and

A chemical injection pump for injecting chemicals into subsea system at depths up to 10,000 feet is described which uses a minimum of moving parts by employing an actuator, for instance a solenoid, to power a double acting actuator rod and plungers thereon. The pump would generate low pressures and low fluid volumes, but be more durable and reliable than conventional rotating pumps operating under subsea conditions.

대표청구항 ▼

A chemical injection pump for injecting chemicals into subsea system at depths up to 10,000 feet is described which uses a minimum of moving parts by employing an actuator, for instance a solenoid, to power a double acting actuator rod and plungers thereon. The pump would generate low pressures and

A chemical injection pump for injecting chemicals into subsea system at depths up to 10,000 feet is described which uses a minimum of moving parts by employing an actuator, for instance a solenoid, to power a double acting actuator rod and plungers thereon. The pump would generate low pressures and low fluid volumes, but be more durable and reliable than conventional rotating pumps operating under subsea conditions. than about 0.3; positioning a first pull sheet on the top surface of the floor sheet, the first pull sheet having a bottom surface with a coefficient of static friction less than about 0.5; placing a first portion of the load on a top surface of the first pull sheet; positioning a second pull sheet on the top surface of the floor sheet, the second pull sheet having a bottom surface with a coefficient of static friction less than about 0.5; placing a second portion of the load on a top surface of the second pull sheet; pulling the second pull sheet from the container while maintaining the load on the top surface of the second pull sheet to unload the load from the container; and pulling the first pull sheet from the container while maintaining the load on the top surface of the first pull sheet to unload the load from the container. 13. The method of claim 12 in which the first and second pull sheets have sufficient strength to pull a load of at least 10,000 pounds from the container. 14. The method of claim 12 wherein the first and second pull sheets comprise a woven mat of polypropylene strips. 15. The method of claim 12 wherein the first and second pull sheets have a load portion and an extension portion, the load portion being adapted to receive the load and the extension portion being adapted to extend away from the load portion for pulling the pull sheet from the container, and wherein the pulling step for the first and second pull sheet comprises extending the respective extension portion away from the load portion, and pulling the extension portion to unload the load from the container. 16. A method of unloading a load from a container having a floor, comprising: positioning a floor sheet on the floor of the container, the floor sheet having a top surface with a coefficient of static friction less than about 0.3; positioning a first pull sheet on the top surface of the floor sheet, the first pull sheet having a load portion and an extension portion, the load portion having a bottom surface with a coefficient of static friction less than about 0.5 and being adapted to receive the load, and the extension portion being adapted to extend away from the load portion for pulling the first pull sheet from the container; placing a first portion of the load on a top surface of the first pull sheet; positioning a second pull sheet on the top surface of the floor sheet, the second pull sheet having a load portion and an extension portion, the load portion having a bottom surface with a coefficient of static friction less than about 0.5 and being adapted to receive the load, and the extension portion being adapted to extend away from the load portion for pulling the second pull sheet from the container; placing a second portion of the load on a top surface of the second pull sheet; extending the extension portion of the second pull sheet; pulling the second pull sheet from the container by pulling the extension portion relative to the container while maintaining the load on the top surface of the second pull sheet to unload the load from the container; extending the extension portion of the first pull sheet; and pulling the first pull sheet from the container by pulling the extension portion relative to the container while maintaining the load on the top surface of the first pull sheet to unload the load from the container. 17. The method of claim 16 in which the pulling steps for the first and second pull sheet comprise attaching the extension portion to a moving means that pulls the pull sheet relative to the container to unload the load from the container. 18. The method of claim 16 in which the first and second pulling steps comprise fixing the extension portion to an immovable object, and moving the container to unload the load from the container.