Piston pump assembly with flexible riser pipe
AssigneeBlackhawk Environmental Co.
InventorMark Bertane
Life of this patent
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Abstract
A pump for pumping liquid from a well having a continuous flexible riser pipe that does not have a coil memory and a flexible actuating rod disposed within the flexible riser pipe. A piston valve unit is disposed at one end of the riser pipe and drivably connected to the actuating, the piston valve unit having an outer diameter that is greater than the inner diameter of the continuous riser pipe.
Claims19
A pumping assembly for elevating liquid through a well having a riser for channeling liquid, a discharge device for removal of liquid from the riser, a piston device for elevating liquid toward the discharge device and including an actuating rod, the actuating rod formed of a flexible material enabling it to be coiled prior to installation, a piston valve unit disposed at a first end of the riser and drivably connected to the actuating rod, and a stationary valve unit disposed at the second end of the riser, adjacent the piston valve unit and operable to remain in a substantially fixed position relative to the riser during movement of the piston valve unit, comprising:
- the riser being a continuous flexible pipe formed of a material capable of being coiled prior to installation, and then when installed in an elongated generally vertical orientation, capable of forming an essentially straight section with essentially no coil memory so as to substantially avoid any wear by the movement of the unitary actuating rod therewithin;
- and
- wherein the piston valve unit has an outer diameter that is greater than an inner diameter of the riser.
A top head drive positive displacement piston pump assembly for elevating liquids in a well, comprising:
- a drive motor;
- a discharge tee;
- a well head;
- a combination of a flexible drive rod interfitted within a flexible riser pipe, as mounted at the respective second end thereof to the drive motor and well head, the pre-threaded combination capable of being jointly coilable for shipment and storage prior to installation, and further capable at installation of being jointly uncoiled and extended in a substantially straight length into a well, with the flexible riser pipe once straightened having essentially no residual spiraling caused by coil memory;
- and
- a pump foot valve cylinder assembly mounted at a first end of the interfitted combination of flexible drive rod and flexible riser pipe, the pump foot valve cylinder assembly including a cylinder, a stationary valve unit mounted in the cylinder and operable to remain stationary therewith during movement of a piston, and a reciprocal piston valve unit slidably operable within the cylinder,
- wherein the outer diameter of the pump foot valve cylinder assembly is greater than the inner diameter of the flexible riser pipe, thereby preventing at least the piston valve unit from being capable of being withdrawn through the flexible riser pipe for maintenance or replacement.
A method of maximizing pump flow rate of a pump foot valve cylinder assembly as connected by a riser and an actuating rod to a top head drive positive displacement piston pump assembly, for elevating liquids in a well, comprising the steps of:
- arranging the riser as a continuous riser formed of a coilable material capable, when uncoiled and installed for use in a well, to operatively extend into a substantially straight orientation with essentially no coil memory so as to cause essentially no residual spiral shape, thereby substantially eliminating any contact wear of the interfitted reciprocating actuating rod within the continuous riser;
- and
- attaching a pump foot valve cylinder assembly to the continuous riser,
- wherein the pump foot valve cylinder assembly has a diameter that is greater than the diameter of the continuous riser.
Dependencies are inferred from the claim text.