Externally assisted valve for a positive displacement pump
AssigneeSchlumberger Technology Corporation
InventorsToshimichi Wago, Philippe Gambier, Jean-Louis Pessin, Rajesh Luharuka
Life of this patent
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Abstract
A positive displacement pump having a valve with an actuation guide for assisting its actuation. The valve may be configured for controlling fluid communication relative to a chamber of the pump with the valve actuation guide positioned external to the chamber and configured to assist in the controlling. The valve actuation guide itself may include an arm extending into a valve actuation assembly below the valve. In such embodiments, the arm may be reciprocated by crankshaft, hydraulic, or other means. Alternatively, the valve actuation assembly may include electromagnetic means for assisting in actuation of the valve.
Claims22
A positive displacement pump comprising:
- a housing for a pressurizable chamber;
- a plunger configured to reciprocate inside the pressurizable chamber;
- a valve of said housing for controlling fluid communication with the pressurizable chamber;
- a valve actuation guide external to the pressurizable chamber connected to said valve by a coupling to assist opening or closing the valve to control fluid communication with the pressurizable chamber;
- and,
- a timing mechanism for controlling a timing of when the valve actuation guide assists opening or closing the valve relative to a position of the plunger inside the pressurizable chamber, and wherein the timing mechanism is selected from the group consisting of (i) a timing belt, and (ii) a sensor to monitor said position of said plunger and a processor to analyze data from said sensor.
A positive displacement pump assembly for positioning at an oilfield to deliver a fluid to a well thereat during an operation, the positive displacement pump assembly comprising:
- a housing for a pressurizable chamber;
- a plunger configured to reciprocate inside the pressurizable chamber;
- a supply of the fluid adjacent the pressurizable chamber;
- a valve of said housing for controlling access by the fluid to the pressurizable chamber;
- a valve actuation guide external to the pressurizable chamber connected to the valve by a coupling to assist opening or closing the valve to control fluid communication with the pressurizable chamber;
- and,
- a timing mechanism for controlling a timing of when the valve actuation guide assists opening or closing the valve relative to a position of the plunger inside the pressurizable chamber, and wherein the timing mechanism is selected from the group consisting of (i) a timing belt, and (ii) a sensor to monitor said position of said plunger and a processor to analyze data from said sensor.
A valve actuation guide assembly for positioning adjacent a housing for a pressurizable chamber of a positive displacement pump, the valve actuation guide assembly comprising an actuation guide connected to a valve of the housing by a coupling to control fluid communication with the pressurizable chamber, wherein said actuation guide assists opening or closing the valve to control fluid communication with the pressurizable chamber, and a timing mechanism for controlling a timing of when the valve actuation guide assists opening or closing the valve relative to a position of the plunger inside the pressurizable chamber, and wherein the timing mechanism is selected from the group consisting of (i) a timing belt, and (ii) a sensor to monitor said position of said plunger and a processor to analyze data from said sensor.
Dependencies are inferred from the claim text.