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US 12,618,292 B2Granted
On demand flow pulsing system
AssigneeNational Oilwell Varco, L.P.
InventorsKhoi Trinh, Steve Bhagwandin, Yufang Xia, Ian Forster
Life of this patent
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Abstract
Embodiments disclosed herein are directed to a flow pulsing system including a rotor, a stator, a dart which is configured to releasably couple with the rotor, and a nozzle releasably coupled to the rotor which is configured to control a fluid flow through the rotor. In some embodiments, the system uses a screen disposed therein which includes an inner bore in fluid communication with a plurality of lobe cavities along the rotor. In some embodiments, the system uses a stationary valve and an oscillating valve having a plurality of oscillating valve ports which are in fluid communication with the plurality of lobe cavities.
Claims17
A flow pulsing system comprising:
- a housing having a central axis, a first end, a second end opposite the first end, and a bore extending along the central axis from the first end to the second end;
- a stator disposed within the bore of the housing having a plurality of lobe cavities;
- a rotor disposed within the stator, the rotor comprising:
- an axis offset from the central axis;
- a plurality of lobes that mate with the plurality of lobe cavities;
- and
- a thru bore extending along the axis;
- and
- a valve section comprising:
- a stationary valve coupled to the second end of the housing, the stationary valve comprising a first face, a stationary central port aligned with the central axis, and a plurality of stationary valve ports;
- an oscillating valve coupled to the rotor, the oscillating valve comprising a second face abutting the first face, an oscillating central port aligned with the axis of the rotor and in fluid communication with the thru bore of the rotor, and a plurality of oscillating valve ports in fluid communication with the plurality of lobe cavities.
8 more elements
A flow pulsing system comprising:
- a housing having a central axis, a first end, a second end opposite the first end, and
- a bore extending along the central axis from the first end to the second end;
- a stator disposed within the bore of the housing having a plurality of lobe cavities;
- a rotor disposed within the stator, the rotor comprising:
- an axis offset from the central axis;
- a plurality of lobes that mate with the plurality of lobe cavities;
- and
- a thru bore extending along the axis;
- a valve section comprising:
- a stationary valve coupled to the second end of the housing, the stationary valve comprising a first face, a stationary central port, and a plurality of stationary valve ports;
- and
- an oscillating valve coupled to the rotor, the oscillating valve comprising a second face abutting the first face, an oscillating central port in fluid communication with the thru bore of the rotor, and a plurality of oscillating valve ports in fluid communication with the plurality of lobe cavities;
- a releasable nozzle coupled to the rotor and configured to control a first fluid flow through the thru bore of the rotor;
- and
- a dart configured to releasably couple with a seat within the thru bore of the rotor, the dart including an inner coupling surface along an inner bore which threadably couples with the releasable nozzle coupled to the rotor;
- wherein the releasable nozzle is configured to control a second fluid flow along a path between the plurality of lobe cavities of the stator and the plurality of lobes along the rotor.
13 more elements
A flow pulsing system comprising:
- a housing having a central axis, a first end, a second end opposite the first end, and
- a bore extending along the central axis from the first end to the second end;
- a stator disposed within the bore of the housing having a plurality of lobe cavities;
- a rotor disposed within the stator, the rotor comprising:
- an axis offset from the central axis;
- a plurality of lobes that mate with the plurality of lobe cavities;
- and
- a thru bore extending along the axis;
- and
- a valve section comprising:
- a stationary valve coupled to the second end of the housing, the stationary valve comprising a first face, a stationary central port, and a plurality of stationary valve ports;
- an adapter comprising a body and an outer surface;
- an oscillating valve coupled to the rotor by the adapter disposed between the oscillating valve and the rotor, the oscillating valve comprising a body with a radially outer surface, a second face abutting the first face, an oscillating central port in fluid communication with the thru bore of the rotor, and a plurality of oscillating valve ports in fluid communication with the plurality of lobe cavities through an inlet disposed in the radially outer surface of the oscillating valve body.
10 more elements
Dependencies are inferred from the claim text.