Tunable down-hole stimulation systems feature closed-loop control of pumps and tunable down-hole stimulators. Stimulators generate and hydraulically transmit broad vibration spectra tuned for resonance excitation and fracturing of geologic materials adjacent to the wellbore. Feedback data for contro
Tunable down-hole stimulation systems feature closed-loop control of pumps and tunable down-hole stimulators. Stimulators generate and hydraulically transmit broad vibration spectra tuned for resonance excitation and fracturing of geologic materials adjacent to the wellbore. Feedback data for controlling stimulation includes backscatter vibration originating in stimulated geologic material and detected at the stimulator(s). For initial fracturing with relatively large particle sizes, the power spectral density (PSD) of each stimulator output is down-shifted toward the lower resonant frequencies of large particles. As fracturing proceeds to smaller (proppant-sized) fragments having higher resonant frequencies, backscatter vibration guides progressive up-shifting of stimulator PSD to higher vibration frequencies. Stimulator power requirements are minimized by concentrating vibration energy efficiently in frequency bands to which geologic materials are most sensitive at every stage of stimulation. Geologic fragmentation efficiency is thus optimized, with inherent potential for plain-water fracs completed with self-generated proppant.
대표청구항▼
1. A method for tuning a down-hole stimulation system, the method comprising providing at least one frac pump maintaining a fluid environment in a wellbore, said fluid environment contacting geologic material adjacent to said wellbore;providing a tunable down-hole stimulator in said wellbore, said s
1. A method for tuning a down-hole stimulation system, the method comprising providing at least one frac pump maintaining a fluid environment in a wellbore, said fluid environment contacting geologic material adjacent to said wellbore;providing a tunable down-hole stimulator in said wellbore, said stimulator comprising a vibration generator responsive to a periodic control signal by transmitting to said geologic material, via said fluid environment, a vibration burst simultaneously comprising a plurality of vibration frequencies; andproviding a programmable controller, said programmable controller transmitting each said periodic control signal to said tunable down-hole stimulator;wherein said vibration generator comprises an electromagnetic driver, a movable hammer, and a fluid interface, said movable hammer being responsive to said electromagnetic driver for periodically striking said fluid interface, and rebounding therefrom during an adjustable rebound cycle time, to transmit one said vibration burst to said geologic material via said fluid environment;wherein said electromagnetic driver is responsive to each said periodic control signal;wherein each said vibration burst has an adjustable power spectral density, each said adjustable power spectral density being responsive to one said adjustable rebound cycle time;wherein each said vibration burst excites induced geologic resonance vibration in said geologic material;wherein said fluid interface comprises at least one accelerometer for detecting each said vibration burst and detecting time-shifted backscatter vibration energy from said induced geologic resonance vibration, said at least one accelerometer transmitting an accelerometer signal derived from detected vibration;wherein each said adjustable rebound cycle time is responsive to one said accelerometer signal for tuning said down-hole stimulation system; andwherein shortening one said adjustable rebound cycle time up-shifts one said adjustable power spectral density. 2. A method for tuning a down-hole stimulation system, the method comprising providing at least one frac pump maintaining a fluid environment in a wellbore, said fluid environment contacting geologic material adjacent to said wellbore;providing a tunable down-hole stimulator in said wellbore, said stimulator comprising a vibration generator responsive to a periodic control signal by transmitting to said geologic material, via said fluid environment, a vibration burst simultaneously comprising a plurality of vibration frequencies; andproviding a programmable controller, said programmable controller transmitting each said periodic control signal to said tunable down-hole stimulator;wherein said vibration generator comprises an electromagnetic driver, a movable hammer, and a fluid interface, said movable hammer being responsive to said electromagnetic driver for periodically striking said fluid interface, and rebounding therefrom during an adjustable rebound cycle time, to transmit one said vibration burst to said geologic material via said fluid environment;wherein said electromagnetic driver is responsive to each said periodic control signal;wherein each said vibration burst has an adjustable power spectral density, each said adjustable power spectral density being responsive to one said adjustable rebound cycle time;wherein each said vibration burst excites induced geologic resonance vibration in said geologic material;wherein said fluid interface comprises at least one accelerometer for detecting each said vibration burst and detecting time-shifted backscatter vibration energy from said induced geologic resonance vibration, said at least one accelerometer transmitting an accelerometer signal derived from detected vibration;wherein each said adjustable rebound cycle time is responsive to one said accelerometer signal for tuning said down-hole stimulation system; andwherein lengthening one said adjustable rebound cycle time down-shifts one said adjustable power spectral density. 3. A down-hole stimulation system comprising a frac pump maintaining a down-hole fluid environment in a wellbore, said fluid environment contacting geologic material adjacent to said wellbore;a down-hole stimulator for transmitting, via said fluid environment and in response to a periodic control signal, a vibration burst having an adjustable power spectral density, each said vibration burst exciting induced geologic resonance vibration in said geologic material; anda programmable controller for transmitting each said periodic control signal to said down-hole stimulator;wherein said down-hole stimulator comprises a hollow cylindrical housing having a longitudinal axis, a first end, and a second end, said first end being closed by a fluid interface for transmitting and receiving vibration via said fluid environment, said fluid interface comprising at least one accelerometer for producing an accelerometer feedback signal representing vibration transmitted and received by said fluid interface;a driver element reversibly sealing said second end; anda hammer element longitudinally movable within said housing between said driver element and said fluid interface, said hammer element being responsive to said driver element for periodically striking said fluid interface, and rebounding therefrom during an adjustable rebound cycle time, to transmit one said vibration burst comprising a plurality of transmitted vibration frequencies to said geologic material via said fluid environment;wherein said driver element comprises an electromagnet/controller having cyclical magnetic polarity reversal characterized by a variable polarity reversal frequency;wherein said vibration transmitted and received by said fluid interface includes both transmitted vibration energy and time-shifted backscatter vibration energy from said induced geologic resonance vibration;wherein longitudinal movement of said hammer element is responsive to said cyclical magnetic polarity reversal;wherein longitudinal movement of said hammer element striking, and rebounding from, said fluid interface is in phase with said variable polarity reversal frequency;wherein each said adjustable power spectral density is responsive to one said adjustable rebound cycle time; andwherein shortening one said adjustable rebound cycle time up-shifts one said adjustable power spectral density. 4. A down-hole stimulation system comprising a frac pump maintaining a down-hole fluid environment in a wellbore, said fluid environment contacting geologic material adjacent to said wellbore;a down-hole stimulator for transmitting, via said fluid environment and in response to a periodic control signal, a vibration burst having an adjustable power spectral density, each said vibration burst exciting induced geologic resonance vibration in said geologic material; anda programmable controller for transmitting each said periodic control signal to said down-hole stimulator;wherein said down-hole stimulator comprises a hollow cylindrical housing having a longitudinal axis, a first end, and a second end, said first end being closed by a fluid interface for transmitting and receiving vibration via said fluid environment, said fluid interface comprising at least one accelerometer for producing an accelerometer feedback signal representing vibration transmitted and received by said fluid interface;a driver element reversibly sealing said second end; anda hammer element longitudinally movable within said housing between said driver element and said fluid interface, said hammer element being responsive to said driver element for periodically striking said fluid interface, and rebounding therefrom during an adjustable rebound cycle time, to transmit one said vibration burst comprising a plurality of transmitted vibration frequencies to said geologic material via said fluid environment;wherein said driver element comprises an electromagnet/controller having cyclical magnetic polarity reversal characterized by a variable polarity reversal frequency;wherein said vibration transmitted and received by said fluid interface includes both transmitted vibration energy and time-shifted backscatter vibration energy from said induced geologic resonance vibration;wherein longitudinal movement of said hammer element is responsive to said cyclical magnetic polarity reversal;wherein longitudinal movement of said hammer element striking, and rebounding from, said fluid interface is in phase with said variable polarity reversal frequency;wherein each said adjustable power spectral density is responsive to one said adjustable rebound cycle time; andwherein lengthening one said adjustable rebound cycle time down-shifts one said adjustable power spectral density.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (75)
MacDonald George (Garrettsville OH), Adjustable seal for propeller drive shaft.
Cameron Donald C. (Tulsa OK) Shireman Paul M. (Westerville OH), Frangible pressure relief disc assembly and positive displacement pumps containing the disc assembly.
Jones, Christopher M.; van Zuilekom, Anthony H.; Pelletier, Michael T.; Proett, Mark A.; Atkinson, Robert, Monitoring flow of single or multiple phase fluids.
Doncker Francis (Neuhausen DEX) Helber Rolf (Schorndorf DEX) Welzel Gerhard (Seeshaupt DEX) Bung Richard (Ludwigshafen DEX), Mounting arrangement for vehicle engine and the like.
Müller, Frank; Pfister, Andreas; Leuterer, Martin, PAEK powder, in particular for the use in a method for a layer-wise manufacturing of a three-dimensional object, as well as method for producing it.
Blank Norman E. (Heidelberg MD DEX) Hartwig RIchard C. (Laurel MD) Vu Cung (Gaithersburg MD), Polyurethane-poly (vinylchloride) interpenetrating network.
Shearer, Tony L.; Smith, Robert W. M.; Hofmann, Heath F., Sensorless control of a harmonically driven electrodynamic machine for a thermoacoustic device or variable load.
Zeng,Kefeng; Ong,Keat G.; Grimes,Craig A., Technique and electronic circuitry for quantifying a transient signal using threshold-crossing counting to track signal amplitude.
Fink David J. (Greentree PA) Ira Stephen M. (Plum Boro PA) Frick Thomas M. (North Huntingdon PA) Ziler James R. (Pittsburgh PA), Tube vibration dampener and stiffener apparatus and method.
Wilfong Debra L. (Lake Elmo MN) Drath David J. (St. Paul MN) Palazzotto Michael C. (St. Paul MN) Willett Peggy S. (Stillwater MN) Clark ; III Henry B. (Roseville MN), Vibration damping constructions using acrylate-containing damping materials.
Wilfong Debra L. (Lake Elmo MN) Drath David J. (St. Paul MN) Palazzotto Michael C. (St. Paul MN) Willett Peggy S. (Stillwater MN) Clark ; III Henry B. (Roseville MN), Vibration damping constructions using acrylate-containing damping materials.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.