On demand flow pulsing system
AssigneeNational Oilwell Varco, L.P.
InventorsKhoi Trinh, Steve Bhagwandin, Yufang Xia, Ian Forster
Life of this patent
Estimating the term…
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.
Claims15
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 dart configured to releasably couple with the thru bore of the rotor, the dart comprising:
- a first radially outer guide section;
- a second radially outer guide section;
- a tip;
- an inner bore;
- and
- a releasable nozzle configured to control a first fluid flow through the inner bore and the thru bore.
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 correspond with the plurality of lobe cavities;
- and
- a thru bore extending along the axis;
- and
- a screen disposed within the bore of the housing, the screen comprising:
- a body;
- a coupling surface at a first end of the body, the coupling surface configured to couple to the housing;
- a screen housing extending to a second end of the body;
- and
- an inner bore to fluidly communicate with the thru bore.
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 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, wherein fluid flow is directed both through the thru bore and the oscillating central port, and the oscillating valve ports along a path between the plurality of lobe cavities of the stator and the plurality of lobes of the rotor to generate pressure pulses.
Dependencies are inferred from the claim text.