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US 2008/0302389 A1Published application
Pig pumping unit
OwnerOrlande Sivacoeinventor
Life of this patent
Estimating the term…
Abstract
A pumping unit is provided that allows at least four passes to be made simultaneously with a single pumping unit. A single engine is used to drive two pumps, each connected into separate pumping circuits. Fluid flow in each of the pumping circuits is controlled by respective flow control elements on the pumping circuits, as for example a variable flow valve. Two engines may thus be used to drive four pumps.
Claims10
A pig pumping unit, comprising:
- one or more clean water tanks;
- one or more dirty water tanks;
- at least a first engine connected to drive a first pump and to drive a second pump;
- the first pump having at least a first inlet and a first power outlet, the first inlet being connected to receive water from at least one of the one or more clean water tanks;
- the second pump having at least a second inlet and a second power outlet, the second inlet being connected to receive water from at least one of the one or more clean water tanks;
- a first valved pumping circuit connected to receive pig drive fluid from the first power outlet and including a first return conduit connected to return pig drive fluid to at least one of the one or more dirty water tanks, the first valved pumping circuit having connections for connecting a first pipe to be cleaned into the first valved pumping circuit;
- a second valved pumping circuit connected to receive pig drive fluid from the second power outlet and including a second return conduit connected to return pig drive fluid to at least one of the one or more dirty water tanks, the second valved pumping circuit having connections for connecting a second pipe to be cleaned into the second valved pumping circuit;
- a first variable flow control element on the first valved pumping circuit;
- and
- a second variable flow control element on the second valved pumping unit.
7 more elements
A method of pigging at least a first pipe and a second pipe, the method comprising the steps of:
- connecting the first pipe into a first pumping circuit, the first pumping circuit having a first pump;
- connecting the second pipe into a second pumping circuit, the second pumping circuit having a second pump;
- driving the first pump by a first engine;
- driving the second pump by the first engine;
- controlling fluid flow in the first pumping circuit with a first variable flow control element;
- and
- controlling fluid flow in the second pumping circuit with a second variable flow control element.
4 more elements
Dependencies are inferred from the claim text.