US20110094732A1 - Vibrating system and method for use in sand control and formation stimulation in oil and gas recovery operations - Google Patents
Vibrating system and method for use in sand control and formation stimulation in oil and gas recovery operations Download PDFInfo
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- US20110094732A1 US20110094732A1 US10/650,186 US65018603A US2011094732A1 US 20110094732 A1 US20110094732 A1 US 20110094732A1 US 65018603 A US65018603 A US 65018603A US 2011094732 A1 US2011094732 A1 US 2011094732A1
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- wellbore
- acoustic transducer
- driver
- scale
- tool
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/04—Gravelling of wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B28/00—Vibration generating arrangements for boreholes or wells, e.g. for stimulating production
Definitions
- This invention relates to a vibrating device for use in sand control and formation stimulation in an oil and gas recovery operation.
- support and screening devices such as screens, slotted liners, and the like, have been utilized to support a gravel pack, or the like, in the well to stabilize the formation while permitting the recovered fluids to pass from the formation into the wellbore while preventing passage of fines or formation sand with the recovered fluids.
- a “skin” develops around the wall of the wellbore which impedes the flow of fluid from the formation requiring stimulation techniques to remove the skin and stimulate the formation.
- FIG. 1 is a diagrammatic view of an embodiment of the sand control system of the present invention shown in a downhole environment.
- FIG. 2 is a flow chart depicting steps of a method according to an alternate embodiment of the invention.
- FIG. 3 is a graph depicting two variables in accordance with the embodiment of FIG. 2 .
- the reference 10 refers, in general, to a downhole tool installed in a wellbore 12 .
- the tool 10 is connected to a wireline or coiled tubing 14 , and is lowered to a depth in the wellbore 12 penetrating a producing formation F.
- a casing (not shown) can be provided in the wellbore 12 and that production tubing (not shown) is installed in the wellbore 12 above the tool 10 .
- the devices 16 a - 16 d are mounted, in any conventional manner, to the wall of the wellbore 12 penetrating the formation F.
- the devices 16 a - 16 d can be in the form of screens, slotted liners, or any similar type of gravel support device. Although not clear from the drawing due to scale limitations, it is understood that the devices 16 a - 16 d define an annular space with the wall of the wellbore 12 that receives one or more gravel packs, or the like, (not shown).
- each gravel pack is to improve the integrity of the wall of the wellbore 12 , yet allow recovered fluids to pass to and through the devices 16 a - 16 d and into the wellbore 12 , while preventing the passage of any fines or sand from the fluids. Since these gravel packs are conventional, they will not be described in any further detail.
- Two electrical drivers 18 a and 18 b are mounted on the tool 10 in an axially-spaced relation.
- the drivers 18 a and 18 b are conventional and, as such, are connected to a source of AC or DC power received from ground surface and are adapted to supply electrical power for reasons to be described.
- An acoustic transducer 20 a is mounted on the wall of the wellbore 12 between the devices 16 a and 16 b; an acoustic transducer 20 b is mounted on the wall of the wellbore 12 between the devices 16 b and 16 c; and an acoustic transducer 20 c is mounted on the wall of the wellbore 12 between the devices 16 c and 16 d.
- the acoustic transducers 20 a - 20 c can be in the form of conventional electromechanical transducers, or converters, such as tuning forks, cantilevers, oval-mode tools, magnetostrictive drivers, or piezoelectric transducers that vibrate in response to an input signal.
- the acoustic transducers 20 a - 20 c are driven, or excited by electrical power output from the drivers 18 a and 18 b and operate efficiently at a desired, predetermined frequency when actuated.
- one of the drivers 18 a and 18 b, as well as one or two of the acoustic transducers 20 a - 20 c, can operate at a relatively high frequency; while the other driver and the other acoustic transducer(s) can operate at a relatively low frequency.
- acoustic transducers 20 a - 20 c As a particular example of the type of acoustic transducers 20 a - 20 c that can be used, if the desired frequency is above 4 kHz, one or more of the acoustic transducers 20 a - 20 c can be in the form of piezoelectric transducers, such as those marketed under the designation PZT-4 by the Edo Corporation of Salt Lake City, Utah. If it is desired to operate below 4 kHz, one or more of the acoustic transducers 20 a - 20 c can be in the form of conventional magnetostrictive drivers.
- the frequency, or frequencies, of the electrical output of the drivers 18 a and 18 b are matched to the frequencies of the acoustic transducers 20 a - 20 c, so that the acoustic transducers 20 a - 20 c are driven at their resonant frequencies, and the devices 16 a - 16 d are designed to resonate at these frequencies.
- the acoustic transducers 20 a - 20 c are mechanically coupled to the devices 16 a - 16 d in a manner so that vibrations of the acoustic transducers 20 a - 20 c are imparted to the devices 16 a - 16 d.
- the acoustic transducers 20 a - 20 c can be designed to form, with the devices 16 a - 16 d, one assembly, or package, that is inserted as a unit in the wellbore 12 and mounted to the wellbore 12 in a conventional manner.
- the devices 16 a and 16 b provide equal and opposite loads on the acoustic transducer 20 a, so that the acoustic transducer 20 a can be used to vibrate the two devices 16 a and 16 b simultaneously.
- the devices 16 b and 16 c provide equal and opposite loads on the acoustic transducer 20 b so that the acoustic transducer 20 b can be used to vibrate the two devices 16 b and 16 c simultaneously; and the devices 16 c and 16 d provide equal and opposite loads on the acoustic transducer 20 c so that the acoustic transducer 20 c can be used to vibrate the two devices 16 c and 16 d simultaneously.
- a pressure sensor 22 a is mounted to the outer surface of the device 16 b; a pressure sensor 22 b is mounted between the outer surfaces of the devices 16 c and 16 d; and two pressure sensors 22 c and 22 d are mounted to the inner surfaces of the devices 16 a and 16 c, respectively.
- the pressure sensors 22 a and 22 b are adapted to sense the pressure of production fluid outside the devices 16 a - 16 d, and the pressure sensors 22 c and 22 d are adapted to sense the pressure of the fluid inside the devices 16 a - 16 d.
- the pressure sensors 22 a - 22 d can be said to sense a condition of the devices 16 a - 16 d.
- a control unit 24 which can be in the form of a microprocessor, or the like, is mounted to the wall of the wellbore 12 just above the device 16 a and, although not shown in the drawing in the interest of clarity, is electrically connected to the pressure sensors 22 a - 22 d.
- the control unit 24 is adapted to process signals from the pressure sensors 22 a - 22 d and generate a corresponding output signal, for reasons to be described.
- a telemetry device 26 is mounted on the tool 10 and is adapted to collect data from the control unit 24 and transmit the data to the ground surface for processing. Since the telemetry device 26 is conventional it will not be described in detail.
- a conductor assembly 28 extends from the drivers 18 a and 18 b, the telemetry device 26 , through the wireline or coiled tubing 14 and to ground surface; and a conductor assembly 28 a extends from the control unit 24 to the conductor assembly 28 .
- the conductor assemblies 28 and 28 a include sufficient cables to transmit electrical power and telemetry between the ground surface and the drivers 18 a and 18 b, the control unit 24 , and the telemetry device 26 .
- the telemetry can include depth, pressure, and temperature data, and any other necessary wellbore data.
- the pressure sensors 22 a - 22 d can also be electrically connected to the conductor assembly 28 for the same reasons.
- the devices 16 a - 16 d and the acoustic transducers 20 a - 20 c are inserted in, and mounted to, the wellbore 12 , preferably as a package, adjacent the formation F as shown in FIG. 1 , and the devices 16 a - 16 d are packed with sand, or the like, to form a gravel pack.
- Production is started and, as a result, fluids recovered from the formation F pass through the gravel packs and the devices 16 a - 16 d and upwardly in the wellbore 12 to the above-mentioned production tubing (not shown) for passing to the ground surface, while the devices 16 a - 16 d prevent fines or sand from the fluids from passing with the fluids.
- the pressure sensors 22 a and 22 b sense the pressure of the recovered fluid outside the devices 16 a - 16 d and generate corresponding signals which are transmitted to the control unit 24 .
- the pressure sensors 22 c and 22 d sense the pressure of the recovered fluid inside the devices 16 a - 16 d and generate corresponding signals which are also transmitted to the control unit 24 .
- the control unit 24 processes the above signals and is programmed to respond when the fluid pressure outside the devices 16 a - 16 d exceeds the fluid pressure inside the devices 16 a - 16 d by a predetermined amount, indicating that the devices 16 a - 16 d are at least partially clogged with scale, and/or any other foreign materials. When this happens, the control unit 24 sends a corresponding signal to the telemetry device 26 which, in turn, sends a corresponding signal, via the conductor assembly 28 , to the ground surface.
- the operator at the ground surface responds to the above signal from the telemetry device 26 , and lowers the tool 10 , via the wireline or coiled tubing 14 , to a position in which the drivers 18 a and 18 b are approximately aligned with the acoustic transducer 20 a as shown in FIG. 1 .
- the drivers 18 a and 18 b are activated by the electrical power from the ground surface, which is transmitted to the drivers by the conductor assembly 28 .
- the drivers 18 a and 18 b preferably convert the frequency of the electrical power to drive the acoustic transducer 20 a to cause corresponding vibration of the devices 16 a and 16 b at their resonant frequency in the manner discussed above.
- vibrations dislodge, fracture, or break up, the scale, and/or any other foreign materials, accumulating on the devices 16 a and 16 b. These vibrations can also mobilize fines inside the gravel packs and fines located in the wellbore 12 and in the formation F near the wellbore 12 .
- the scale, fines, and/or materials recovered from the devices 16 a and 16 b are allowed to fall to the bottom of the wellbore 12 , or could be circulated in any conventional manner to the ground surface for recovery.
- the circulation can occur with non-production fluids in a well intervention mode.
- this method is especially useful in that the scale, fines, and/or materials can be produced to the ground surface together with production fluids. Consequently, there is no lost production using this intervention mode.
- the audio output from the acoustic transducer 20 a which can be in the range of 4,000-30,000 Hz, also stimulates the formation F adjacent the devices 16 a and 16 b and reduces the “skin” around the wellbore 12 that can slow the flow of production fluid from the formation to the wellbore 12 .
- the tool 10 is then lowered further to a position in which the drivers 18 a and 18 b are approximately aligned with the acoustic transducer 20 b and the above method is repeated in connection with the devices 16 b and 16 c, after which the method is repeated again with the acoustic transducer 20 c to vibrate the devices 16 c and 16 d.
- the pressure sensors 22 a - 22 d are eliminated and a reservoir model can be utilized to provide information relating to the need to vibrate the devices 16 a - 16 d in the above manner.
- the embodiment of FIG. 2 contains the same components as the embodiment of FIG. 1 .
- data is initially collected to generate an initial reservoir model which is inputted to the control unit 24 .
- the production information is generated and inputted to the control unit 24 which matches the information to the initial model and adjusts the model as necessary to set a working model.
- the additional production data is collected and inputted to the control unit 24 which compares the data to the working model.
- the data is fed back to the control unit 24 for further processing; and, if there is no match, the drivers 18 a and 18 b are actuated to drive the acoustic transducers 20 a - 20 c and thus initiate the device vibration/production stimulation cycle as described above.
- FIG. 3 is a graph of the simulated production from the wellbore 12 vs. time and shows the reservoir model of FIG. 2 by the rectangular data points, and a deviation from the model by the triangular data points, both before and after the scale is removed from the devices 16 a - 16 d and the formation F is stimulated, including removal of the skin, in accordance with the foregoing “treatment”. It is noted that the treatment brings the production back to the model values.
- system and method of the present invention performs the screening and stimulation functions yet eliminates the problems discussed above.
- a control unit such as another microprocessor, the control unit 24 , or other similar device, could be provided to perform this function.
- the reservoir model could be used in addition to the pressure sensors 22 a - 22 d.
- the tool 10 could be lowered into the wellbore 12 prior to the initiation of the fluid recovery process or at least prior to the sensing of the presence of scale, and any other foreign materials, as discussed above.
- the control unit 24 can be programmed to adjust the pressure differential required to actuate the drivers 18 a and 18 b.
- the number and type of screening devices 16 a - 16 d, drivers 18 a and 18 b, acoustic transducers 20 a - 20 c, and/or pressure sensors 22 a - 22 d can be varied. Although two drivers 18 a and 18 b have been shown driving the acoustic transducers 20 a - 20 c, a single driver can be used. Placing multiple drivers on the tool 10 can allow multiple acoustic transducers to be driven simultaneously.
Abstract
A system and method for stimulating a formation penetrated by a wellbore and vibrating a device for supporting a gravel pack in the wellbore, according to which the build up of scale on the device is sensed and a corresponding signal is output. A tool is lowered into the wellbore, and includes a driver for driving an acoustic transducer coupled to the device for vibrating the device and stimulating the formation.
Description
- This invention relates to a vibrating device for use in sand control and formation stimulation in an oil and gas recovery operation.
- Many oil and gas downhole recovery operations, especially high-rate, high-permeability completions, produce reservoir fluids that contain fines, or formation sand. Therefore, support and screening devices, such as screens, slotted liners, and the like, have been utilized to support a gravel pack, or the like, in the well to stabilize the formation while permitting the recovered fluids to pass from the formation into the wellbore while preventing passage of fines or formation sand with the recovered fluids.
- These support devices are often placed in a pressure-drop zone which subjects the devices to contamination from scaling (salt crystal growth) and other materials that are precipitated during production of the reservoir fluids. Thus, the devices must be cleaned either mechanically, which adds to the labor and cost of the project, or chemically, which may harm the metal parts of the devices.
- Also, during the recovery operation from the wellbore, a “skin” develops around the wall of the wellbore which impedes the flow of fluid from the formation requiring stimulation techniques to remove the skin and stimulate the formation.
- Therefore, what is needed is a device of the above type that simultaneously performs the above screening and stimulation functions yet eliminates the above problems.
-
FIG. 1 is a diagrammatic view of an embodiment of the sand control system of the present invention shown in a downhole environment. -
FIG. 2 is a flow chart depicting steps of a method according to an alternate embodiment of the invention. -
FIG. 3 is a graph depicting two variables in accordance with the embodiment ofFIG. 2 . - Referring to
FIG. 1 of the drawings, thereference 10 refers, in general, to a downhole tool installed in awellbore 12. Thetool 10 is connected to a wireline or coiledtubing 14, and is lowered to a depth in thewellbore 12 penetrating a producing formation F. It is also understood that a casing (not shown) can be provided in thewellbore 12 and that production tubing (not shown) is installed in thewellbore 12 above thetool 10. - Four axially-spaced, cylindrical gravel pack support and screening devices 16 a-16 d are mounted, in any conventional manner, to the wall of the
wellbore 12 penetrating the formation F. The devices 16 a-16 d can be in the form of screens, slotted liners, or any similar type of gravel support device. Although not clear from the drawing due to scale limitations, it is understood that the devices 16 a-16 d define an annular space with the wall of thewellbore 12 that receives one or more gravel packs, or the like, (not shown). The purpose of each gravel pack is to improve the integrity of the wall of thewellbore 12, yet allow recovered fluids to pass to and through the devices 16 a-16 d and into thewellbore 12, while preventing the passage of any fines or sand from the fluids. Since these gravel packs are conventional, they will not be described in any further detail. - Two
electrical drivers tool 10 in an axially-spaced relation. Thedrivers - An
acoustic transducer 20 a is mounted on the wall of thewellbore 12 between thedevices acoustic transducer 20 b is mounted on the wall of thewellbore 12 between thedevices acoustic transducer 20 c is mounted on the wall of thewellbore 12 between thedevices - The acoustic transducers 20 a-20 c can be in the form of conventional electromechanical transducers, or converters, such as tuning forks, cantilevers, oval-mode tools, magnetostrictive drivers, or piezoelectric transducers that vibrate in response to an input signal. Preferably, the acoustic transducers 20 a-20 c are driven, or excited by electrical power output from the
drivers drivers - As a particular example of the type of acoustic transducers 20 a-20 c that can be used, if the desired frequency is above 4 kHz, one or more of the acoustic transducers 20 a-20 c can be in the form of piezoelectric transducers, such as those marketed under the designation PZT-4 by the Edo Corporation of Salt Lake City, Utah. If it is desired to operate below 4 kHz, one or more of the acoustic transducers 20 a-20 c can be in the form of conventional magnetostrictive drivers. In either case, the frequency, or frequencies, of the electrical output of the
drivers - The acoustic transducers 20 a-20 c are mechanically coupled to the devices 16 a-16 d in a manner so that vibrations of the acoustic transducers 20 a-20 c are imparted to the devices 16 a-16 d. The acoustic transducers 20 a-20 c can be designed to form, with the devices 16 a-16 d, one assembly, or package, that is inserted as a unit in the
wellbore 12 and mounted to thewellbore 12 in a conventional manner. - The
devices acoustic transducer 20 a, so that theacoustic transducer 20 a can be used to vibrate the twodevices devices acoustic transducer 20 b so that theacoustic transducer 20 b can be used to vibrate the twodevices devices acoustic transducer 20 c so that theacoustic transducer 20 c can be used to vibrate the twodevices - A
pressure sensor 22 a is mounted to the outer surface of thedevice 16 b; apressure sensor 22 b is mounted between the outer surfaces of thedevices pressure sensors devices pressure sensors pressure sensors - A
control unit 24, which can be in the form of a microprocessor, or the like, is mounted to the wall of thewellbore 12 just above thedevice 16 a and, although not shown in the drawing in the interest of clarity, is electrically connected to the pressure sensors 22 a-22 d. Thecontrol unit 24 is adapted to process signals from the pressure sensors 22 a-22 d and generate a corresponding output signal, for reasons to be described. - A
telemetry device 26 is mounted on thetool 10 and is adapted to collect data from thecontrol unit 24 and transmit the data to the ground surface for processing. Since thetelemetry device 26 is conventional it will not be described in detail. - A
conductor assembly 28, shown by a dashed line, extends from thedrivers telemetry device 26, through the wireline or coiledtubing 14 and to ground surface; and aconductor assembly 28 a extends from thecontrol unit 24 to theconductor assembly 28. It is understood that the conductor assemblies 28 and 28 a include sufficient cables to transmit electrical power and telemetry between the ground surface and thedrivers control unit 24, and thetelemetry device 26. In the latter context, it is understood that the telemetry can include depth, pressure, and temperature data, and any other necessary wellbore data. Although not shown in the drawings in the interest of clarity, it is understood that the pressure sensors 22 a-22 d can also be electrically connected to theconductor assembly 28 for the same reasons. - In operation, the devices 16 a-16 d and the acoustic transducers 20 a-20 c are inserted in, and mounted to, the
wellbore 12, preferably as a package, adjacent the formation F as shown inFIG. 1 , and the devices 16 a-16 d are packed with sand, or the like, to form a gravel pack. Production is started and, as a result, fluids recovered from the formation F pass through the gravel packs and the devices 16 a-16 d and upwardly in thewellbore 12 to the above-mentioned production tubing (not shown) for passing to the ground surface, while the devices 16 a-16 d prevent fines or sand from the fluids from passing with the fluids. - The
pressure sensors control unit 24. Similarly, thepressure sensors control unit 24. Thecontrol unit 24 processes the above signals and is programmed to respond when the fluid pressure outside the devices 16 a-16 d exceeds the fluid pressure inside the devices 16 a-16 d by a predetermined amount, indicating that the devices 16 a-16 d are at least partially clogged with scale, and/or any other foreign materials. When this happens, thecontrol unit 24 sends a corresponding signal to thetelemetry device 26 which, in turn, sends a corresponding signal, via theconductor assembly 28, to the ground surface. - The operator at the ground surface responds to the above signal from the
telemetry device 26, and lowers thetool 10, via the wireline or coiledtubing 14, to a position in which thedrivers acoustic transducer 20 a as shown inFIG. 1 . Thedrivers conductor assembly 28. Thedrivers acoustic transducer 20 a to cause corresponding vibration of thedevices devices wellbore 12 and in the formation F near thewellbore 12. The scale, fines, and/or materials recovered from thedevices wellbore 12, or could be circulated in any conventional manner to the ground surface for recovery. The circulation can occur with non-production fluids in a well intervention mode. However, this method is especially useful in that the scale, fines, and/or materials can be produced to the ground surface together with production fluids. Consequently, there is no lost production using this intervention mode. - The audio output from the
acoustic transducer 20 a, which can be in the range of 4,000-30,000 Hz, also stimulates the formation F adjacent thedevices wellbore 12 that can slow the flow of production fluid from the formation to thewellbore 12. - The
tool 10 is then lowered further to a position in which thedrivers acoustic transducer 20 b and the above method is repeated in connection with thedevices acoustic transducer 20 c to vibrate thedevices - As a result of all of the foregoing, scale, and/or any other foreign materials accumulating on the devices 16 a-16 d, are broken up without causing any physical or chemical damage to the devices 16 a-16 d, while the formation F is stimulated and the skin around the
wellbore 12 is reduced. - According to another embodiment of the invention as shown in
FIG. 2 , the pressure sensors 22 a-22 d are eliminated and a reservoir model can be utilized to provide information relating to the need to vibrate the devices 16 a-16 d in the above manner. Otherwise the embodiment ofFIG. 2 contains the same components as the embodiment ofFIG. 1 . According to the embodiment ofFIG. 2 , data is initially collected to generate an initial reservoir model which is inputted to thecontrol unit 24. After production of fluid from the formation F is initiated, the production information is generated and inputted to thecontrol unit 24 which matches the information to the initial model and adjusts the model as necessary to set a working model. As production continues, the additional production data is collected and inputted to thecontrol unit 24 which compares the data to the working model. If there is a match, the data is fed back to thecontrol unit 24 for further processing; and, if there is no match, thedrivers -
FIG. 3 is a graph of the simulated production from thewellbore 12 vs. time and shows the reservoir model ofFIG. 2 by the rectangular data points, and a deviation from the model by the triangular data points, both before and after the scale is removed from the devices 16 a-16 d and the formation F is stimulated, including removal of the skin, in accordance with the foregoing “treatment”. It is noted that the treatment brings the production back to the model values. - Thus, the system and method of the present invention performs the screening and stimulation functions yet eliminates the problems discussed above.
- Several variations may be made in both of the above embodiments without departing from the scope of the invention. These variations are as follows:
- (1) Rather than having an operator at the ground surface activate the
drivers control unit 24, as discussed above, a control unit, such as another microprocessor, thecontrol unit 24, or other similar device, could be provided to perform this function. - (2) Rather than use the reservoir model discussed in connection with
FIG. 2 instead of the pressure sensors 22 a-22 d, the reservoir model could be used in addition to the pressure sensors 22 a-22 d. - (3) The
tool 10 could be lowered into thewellbore 12 prior to the initiation of the fluid recovery process or at least prior to the sensing of the presence of scale, and any other foreign materials, as discussed above. - (4) The
control unit 24 can be programmed to adjust the pressure differential required to actuate thedrivers - (5) The number and type of screening devices 16 a-16 d,
drivers drivers tool 10 can allow multiple acoustic transducers to be driven simultaneously.
Claims (29)
1. A system for use in a wellbore, comprising:
a device for supporting a gravel pack in the wellbore;
at least one acoustic transducer mounted in the wellbore and coupled to the device;
a tool adapted to be inserted in the wellbore in the vicinity of the acoustic transducer; and
an electrical driver mounted on the tool and adapted to drive the acoustic transducer to vibrate the device.
2. The system of claim 1 further comprising a cable assembly connected to the electrical driver for supplying electrical power to the driver to enable the electrical driver to drive the acoustic transducer.
3. The system of claim 1 wherein vibration of the device breaks up any scale on the device and stimulates a formation penetrated by the wellbore.
4. The system of claim 1 wherein the at least one acoustic transducer comprises two acoustic transducers mounted in the wellbore and coupled to the device, wherein the acoustic transducers are axially-spaced in the wellbore and adapted to vibrate the device.
5. The system of claim 1 wherein the acoustic transducer comprises an electromechanical transducer that vibrates in response to an electrical signal.
6. The system of claim 5 wherein the acoustic transducer is selected from the group consisting of a tuning fork, a cantilevers, an oval-mode tool, a magnetostrictive driver, and a piezoelectric transducer.
7. The system of claim 1 wherein the electrical driver is connected to a source of electric power and produces an electrical output that drives the acoustic transducer.
8. The system of claim 1 further comprising:
a sensor for sensing the amount of scale accumulating on the device and outputting a signal when the accumulated scale exceeds a predetermined value; and
means responsive to the signal for actuating the electrical driver.
9. The system of claim 8 wherein the sensor comprises pressure sensors disposed on opposite sides of the device.
10. The system of claim 8 wherein the sensor is a scale detector.
11. The system of claim 8 wherein the means comprises:
a microprocessor for receiving the signal from the sensor; and
a telemetry device for collecting data from the microprocessor and transmitting the data to the ground surface.
12. A method of vibrating a device for supporting a gravel pack in a wellbore, comprising the steps of:
sensing a condition of the device;
outputting a signal when the condition exceeds a predetermined value;
lowering a tool into the wellbore; and
actuating a driver on the tool in response to the signal for driving an acoustic transducer coupled to the device for vibrating the device.
13. The method of claim 12 further comprising the step of supplying electrical power to the driver to enable the driver to drive the acoustic transducer.
14. The method of claim 12 further comprising the step of providing an electrical cable to the driver to provide the electrical power to the driver.
15. The method of claim 14 wherein the step of lowering the tool is after the step of outputting the signal.
16. The method of claim 12 further comprising the step of coupling the device to two axially-spaced acoustic transducers disposed in the wellbore for vibrating the device.
17. The method of claim 12 wherein the step of sensing comprises the step of sensing pressure on opposite sides of the device.
18. The method of claim 12 wherein the step of sensing comprises the step of detecting the scale with a scale sensor.
19. The method of claim 12 wherein the step of outputting a signal when the accumulated scale exceeds a predetermined value further comprising the steps of:
generating data corresponding to the amount of scale; and
transmitting the data to ground surface for processing.
20. The method of claim 19 wherein the step of lowering the tool is in response to the step of transmitting the data to the ground surface.
21. The method of claim 12 wherein vibration of the device stimulates a formation penetrated by the wellbore.
22. The method of claim 12 wherein vibration of the device mobilize fines inside the gravel pack.
23. The method of claim 12 wherein vibration of the device breaks up any scale on the device.
24. The method of claim 23 further comprising the step of producing the scale recovered from the device out of the wellbore with production fluid.
25. The method of claim 23 further comprising the step of circulating the scale recovered from the device out of the wellbore with non-production fluid.
26. A system for use in a wellbore, comprising:
means for supporting a gravel pack in the wellbore;
means coupled to the supporting means for vibrating;
a tool adapted to be inserted in the wellbore in the vicinity of the supporting means; and
means mounted on the tool for driving the vibrating means to vibrate the supporting means and stimulate a formation penetrated by the wellbore.
27. The system of claim 25 wherein the vibrating means is adapted to vibrate in response to receiving electrical power, and the driving means supplies the electrical power to the vibrating means.
28. The system of claim 26 wherein the vibrating means is an acoustic transducer.
29. The system of claim 27 wherein the driving means produces electrical power to drive the acoustic transducer.
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US10/650,186 US20110094732A1 (en) | 2003-08-28 | 2003-08-28 | Vibrating system and method for use in sand control and formation stimulation in oil and gas recovery operations |
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US10/650,186 US20110094732A1 (en) | 2003-08-28 | 2003-08-28 | Vibrating system and method for use in sand control and formation stimulation in oil and gas recovery operations |
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US20110127031A1 (en) * | 2009-11-30 | 2011-06-02 | Technological Research Ltd. | System and method for increasing production capacity of oil, gas and water wells |
US20120132416A1 (en) * | 2010-11-28 | 2012-05-31 | Technological Research, Ltd. | Method, system and apparatus for synergistically raising the potency of enhanced oil recovery applications |
US20130153211A1 (en) * | 2011-12-14 | 2013-06-20 | Schlumberger Technology Corporation | Wave stimulation |
WO2014025349A1 (en) * | 2012-08-08 | 2014-02-13 | Halliburton Energy Services, Inc. | In-well piezoelectric devices to transmit signals |
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US20140313855A1 (en) * | 2009-07-14 | 2014-10-23 | Halliburton Energy Services, Inc. | Acoustic generator and associated methods and well systems |
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US10119356B2 (en) | 2011-09-27 | 2018-11-06 | Halliburton Energy Services, Inc. | Forming inclusions in selected azimuthal orientations from a casing section |
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US9598930B2 (en) | 2011-11-14 | 2017-03-21 | Halliburton Energy Services, Inc. | Preventing flow of undesired fluid through a variable flow resistance system in a well |
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US20130153211A1 (en) * | 2011-12-14 | 2013-06-20 | Schlumberger Technology Corporation | Wave stimulation |
US9791399B2 (en) | 2011-12-21 | 2017-10-17 | Schlumberger Technology Corporation | Derivatization of carbon |
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