CN107299833A - A kind of Casing Detection leak source apparatus and method - Google Patents
A kind of Casing Detection leak source apparatus and method Download PDFInfo
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- CN107299833A CN107299833A CN201710547648.4A CN201710547648A CN107299833A CN 107299833 A CN107299833 A CN 107299833A CN 201710547648 A CN201710547648 A CN 201710547648A CN 107299833 A CN107299833 A CN 107299833A
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- 238000007789 sealing Methods 0.000 claims abstract description 28
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- 238000013500 data storage Methods 0.000 claims description 10
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
- E21B47/107—Locating fluid leaks, intrusions or movements using acoustic means
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Abstract
The invention discloses a kind of Casing Detection leak source apparatus and method; wellhead packer includes packer body; sealing device is provided with packer body; the coiled tubing centralizer includes upper retainer ring and lower retainer ring; upper retainer ring and lower retainer ring are connected by spring members; DATA REASONING instrument includes the first ultrasound data measuring instrument and the second ultrasound data measuring instrument, and the first ultrasound data measuring instrument and the second ultrasound data measuring instrument are arranged in protection device.Measured using ultrasonic wave principle, accurately judge that leak source depth is the premise of quick process accident, a kind of Casing Detection leak source apparatus and method that the present invention is provided, the continuity for borrowing coiled tubing greatly lifts the speed of measurement.Coiled tubing centralizer makes DATA REASONING instrument suitable for the measurement of reducing casing tube, it is to avoid ultrasound data measuring instrument is contacted with internal surface of sleeve pipe causes damage.Ultrasonic signal has abnormal sensibility, the efficient quick, broad applicability of DATA REASONING instrument and the reliability of test philosophy of measurement so that the operation of detection leak source is easier, effective simultaneously.
Description
Technical field
The present invention relates to Casing Detection technical field, particularly a kind of Casing Detection leak source apparatus and method.
Background technology
Well integrality is the premise for ensureing Oil/gas Well safety in production, but sleeve pipe quality, operational procedure, reservoir stress, increasing
The factors such as mechanical force in production operation process will all cause sleeve pipe leak source occur, directly affect flooding pattern and oil-water well
Normal production and development effectiveness.Leakage points are quick and precisely found to be particularly important.
Situ of drilling well conventional cannula look for Lou main method include packer segmentation closure pressure testing method.It is leakage to seal that packer, which is looked for,
After the position under a cloud that there is leak source is set in device tripping in pit shaft, well head water squeezing pressure testing observation pressure testing well section pressure change, such as
There is pressure drop and illustrate that underground has leak source.The advantage of this method is directly perceived obvious.Shortcoming：1. easily failed by packer, pit shaft shape
The factors such as condition influence, and cause leakage section erroneous judgement；2. not applying to has the well of undergauge situation 3. construction technology is relatively complicated, workmen
Operation intensity is big.
The domestic outer tube of investigation looks for method leakage to understand, conventional sleeve pipe look for Lou logging technique have isotope tracer logging,
Flowmeter logging, temperature logging, noise logging, impulse neutron oxygen activation logging, arm Caliper Log and electromagnetic test well logging etc.
Technology.Due to differences such as measuring method, the instrument external diameters used, it is every kind of look for leakage method there are different construction technologies, be suitable for
Different tubing string tests, each method principle and advantage and disadvantage are as follows；
（1）Isotope tracer logging method：This method continuously measures the trend of tracer with detector, to determine the flow direction of water.
For the well of do not cement the well well section and surface pipe leakage, it is impossible to judged using the technique.
（2）Flowmeter logging method：This method be on the premise of water injection rate is constant at the top of perforated interval to well head well section
Continuous or one-point measurement is carried out, instrument and tubing string internal diameter changing factor is excluded, changes in flow rate larger part is leakage points.
（3）Temperature logging method：Exception just occurs on well temperature curve, so as to judge injection well casing leakage well section.
Temperature logging method is looked for leakage can only be by leak source determine in larger interval, and leak source site error is larger.
（4）Noise logging method：Because the flowing of borehole fluid will produce noise, fluid in output mouth, leakage hole, alter groove
Or at undergauge, noise logging curve will appear from the peak value of different frequency.Reconnaissance is needed according to temperature anomaly position when point surveys noise
Or other references are used for reference, and selected by rule of thumb, therefore this method has certain limitation.
（5）Multi-arm caliper imaging logging method：Multi-arm caliber imaging logging tool is a kind of instrument with contacts, passes through well
Footpath well logging can find that casing diameter expands or shrinks situation exactly, so as to find out cased perforated point.Due to each measuring arm it
Between there is angle, measuring arm do not reach place can test leakage, with regard to not illustrating any problem, accuracy is not high.
（6）Electromagnetic test logging method：This method can detect the wall thickness change of tubing and casing in oil pipe（Corrosion）And it is damaged
Situation, also can accurately be analyzed damaged conditions such as casing corrosion, rupture, deformations in single cased well, to damage well
Maintenance provides reference frame.Due to accuracy of instrument, the aperture reflection not in measurement range does not come out, therefore this method also has one
Fixed limitation.
Application No. number：200410036230.X Chinese invention patent disclose one kind and utilize memory ultrasonic flowmeter
The method for detecting casing leakage point, including test carriage, memory ultrasonic flowmeter and detection method, it is characterised in that be to deposit
Storage formula ultrasonic flowmeter is connected on the steel wire of test carriage roller, and it is lower to oil-water well perforated interval top, uses regime flow
The water filling into well, then distance and certain residence time above carry by sequence in certain intervals by memory ultrasonic flowmeter, directly
To well head.Have using memory ultrasonic flowmeter and measure casing profile traffic engineering capability, detect the changes in flow rate of full pit shaft, will
Memory ultrasonic flowmeter proposes well head, is connected with computer, plays back test data, casing leakage is determined according to changes in flow rate
Point, but the patent is also required to carry out multiplicating detection, could lock casing leakage point, workload is big, and process is cumbersome, measurement
Speed is slower, and accuracy rate is not high.
The content of the invention
In view of the above-mentioned problems of the prior art, the present invention provides a kind of Casing Detection leak source apparatus and method, use
Ultrasonic measurement, while using the continuity of coiled tubing, sealing function and the spy placed in the middle of centralizer by wellhead packer
Property realize the uninterrupted measurement of different depth point, improve measuring speed and accuracy.Ultrasonic energy has extremely strong penetrability,
And compared with the audio frequency sound wave of identical energy, the distance of ultrasonic propagation is relatively short, ultrasonic wave is generally propagated in the wellbore
Apart from short, the signal detected can be very close to source of leaks, so as to ensure accurate leak detection.
To achieve these goals, the technical solution adopted by the present invention is：A kind of Casing Detection leak source device, including well head
Packer, coiled tubing centralizer and data measuring instrument, wellhead packer are connected with wellhead casing pipe, coiled tubing centralizer lower end
It is each attached to data measuring instrument on coiled tubing, the wellhead packer includes being provided with packer body, packer body
Sealing device, the coiled tubing centralizer includes upper retainer ring and lower retainer ring, and upper retainer ring and lower retainer ring pass through elasticity
Part is connected, and DATA REASONING instrument includes the first ultrasound data measuring instrument and the second ultrasound data measuring instrument, the first ultrasonic wave
DATA REASONING instrument and the second ultrasound data measuring instrument are fixed by protection device.
Preferably, the sealing device includes sealing device for upper portion of annular and sealer, and sealing device for upper portion of annular includes
O-ring seal, O-ring seal is provided with top plate and seal cover board.
Any of the above-described scheme is preferably, and the O-ring seal is tapered.
Any of the above-described scheme is preferably, and the sealer includes flashboard and right side containment member, hand rotating disk
The unlatching of flashboard is controlled by linkage screw.
Any of the above-described scheme is preferably, and the packer body lower part is additionally provided with pin thread.
Any of the above-described scheme is preferably, and the elastomeric element is spring.
Any of the above-described scheme is preferably, and the lower retainer ring is fixed on coiled tubing outer wall, above and below coiled tubing
It is mobile.
Any of the above-described scheme is preferably, and steel bar is also associated between fixed ring and lower retainer ring.
Any of the above-described scheme is preferably, and the quantity of the steel bar is four, and under the contraction of spring, steel bar is vertical
In outer throwing shape.
Any of the above-described scheme is preferably, the first ultrasound data measuring instrument and the second ultrasound data measuring instrument pair
Claim to set.
Any of the above-described scheme is preferably, and the protection device is annular and is hollow setting, and coiled tubing passes through protection
The cavity ring of device is fixed.
Any of the above-described scheme is preferably, and the first ultrasound data measuring instrument includes the first ultrasonic wave receiving transducer,
Second ultrasound data measuring instrument includes the second ultrasonic wave receiving transducer.
Any of the above-described scheme is preferably, and the first ultrasound data measuring instrument and the second ultrasound data measuring instrument are also
Including piezoelectric transducer, digital signal processing unit, signal amplifier, data storage cell, ultrasound signal receipt probe.
Any of the above-described scheme is preferably, on the first ultrasound data measuring instrument and the second ultrasound data measuring instrument
Lower 5 meters of settings in interval.
Any of the above-described scheme is preferably, and the quantity of the coiled tubing centralizer is two, two coiled tubing rightings
Close to ultrasound data measuring instrument above and below device.
The present invention also provides a kind of detection method of Casing Detection leak source device, comprises the following steps：
Step（1）Device enters before well, and checking the connection of ultrasound data measuring instrument, whether whether normal, information transfer is unobstructed, and
Whether well mouth sealing device is intact, and ultrasound data measuring instrument is transferred into designated depth；
Step（2）Start wellhead packer, the seal cover board above O-ring seal is tightened, while manual closing lower seal
Device, it is ensured that wellhead sealing；
Step（3）The water filling into sleeve pipe by coiled tubing, ensures and exists in whole measurement process middle sleeve well head pressure stabilization
20Mpa。
Step（4）Log-on data measuring instrument, while the ultrasonic signal of depth point where monitoring, when obtaining stable ultrasound
After ripple data-signal, software systems automatic identification determines the point data, points out the point to be measured；
Step（5）Sealer is opened, coiled tubing is above carried to 10 meters, again sealer is sealed, started
The measurement of subsequent point, starts the measurement of subsequent point after stable ultrasound data signal is obtained, the like complete full pit shaft
Measurement；
Step（6）Pressure release, takes out the Casing Detection leak source device in well；
Step（7）The data storage cell of ultrasound data measuring instrument is connected with calculator, reads depth, the ultrasound of measurement
Ripple signal data.Any of the above-described scheme is preferably, and manual closing sealer passes through the manual turntable that turns clockwise, band
Dynamic linkage screw rotation, so that flashboard is closed.
The ultrasonic measurement principle of the present invention：Ultrasound data measuring instrument mainly includes piezoelectric transducer, ultrasonic signal and connect
Receive probe, signal amplifier, digital signal processing unit, data storage cell.Ultrasound signal receipt probe is arranged on protection
Outside device, other each parts are in an integrated fashion inside the loop configuration of protection device.Piezoelectric transducer produces non-
Often low voltage, the signal intensity produced to the sound wave formed at leak source is directly proportional.To extract the frequency that we want.It is small
Piezoelectricity analog signal amplified by signal amplifier and pass through digital signal processing unit.Digital signal processing unit is from being obtained
Amplified signal in extract stable signal source, and sound signal is transformed into digitized signal.With the shape of frequency size
Formula is stored in the data store.Data storage cell is connected with calculator, depth, the ultrasonic signal number of measurement is read
According to the two-dimentional vertical profile figure of drafting judges sleeve pipe leak source.
Beneficial effect：
The beneficial effects of the invention are as follows：
The present invention provides a kind of Casing Detection leak source apparatus and method, including wellhead packer, coiled tubing centralizer and data
Measuring instrument, wellhead packer is connected with wellhead casing pipe, and coiled tubing centralizer and data measuring instrument are each attached on coiled tubing,
The wellhead packer includes being provided with sealing device in packer body, packer body, and the coiled tubing centralizer includes
Upper retainer ring and lower retainer ring, upper retainer ring and lower retainer ring are connected by elastomeric element, and DATA REASONING instrument includes the first ultrasound
Wave number is according to measuring instrument and the second ultrasound data measuring instrument, the first ultrasound data measuring instrument and the second ultrasound data measuring instrument
It is fixed by protection device.Measured using ultrasonic wave principle, it is accurate to judge that leak source depth is quick processing thing
Therefore premise, a kind of Casing Detection leak source apparatus and method for providing of the present invention, the continuity for borrowing coiled tubing greatly carries
Rise the speed of measurement.Coiled tubing centralizer makes DATA REASONING instrument be applied to the measurement of reducing casing tube, overcomes conventional deficiency.Simultaneously
Ultrasonic wave water dynamic effect has abnormal sensibility, the efficient quick, broad applicability of DATA REASONING instrument of measurement and test
The reliability of principle so that the operation of detection leak source is easier, effective.
（1）Ultrasonic wave has very strong penetrability as audio frequency, but compared with the sound wave of the audio frequency of identical energy, ultrasound
The distance that ripple is propagated is relatively short, when detecting ultrasonic signal, illustrates that detection, close to instrument leak source, improves precision.
（2）On the basis of wellhead packer can be sealed and ensure that coiled tubing is above carried, coiled tubing length is borrowed special
Levy, realize in a high voltage state, the continuous measurement of data, it is ensured that the integrality of data improves operating efficiency；
（3）DATA REASONING instrument is influenceed easily to collide with internal surface of sleeve pipe in decentralization process is above put forward with coiled tubing by swinging, many
Secondary shock friction will make DATA REASONING instrument surface damage, or cause interior instrument Long-term Vibration to fail.In measurement process
In, DATA REASONING instrument contacts to produce to disturb with the inwall of sleeve pipe will influence normally receiving for ultrasonic signal.In water under high pressure environment
Under easily cause water enter DATA REASONING instrument annular shields inside, cause DATA REASONING instrument circuit short circuit, instrument failure.Cause
This helps centralizer the invention provides a kind of coiled tubing of reducing, and reply changes in measurement process middle sleeve internal diameter
When, acted on by the contraction and the diastole of toughness steel bar of spring, keep coiled tubing to help at the DATA REASONING instrument of centralizer upper-lower section
In sleeve pipe centre position.For example when coiled tubing helps centralizer to enter the larger sleeve pipe of internal diameter by the less sleeve pipe of internal diameter, bullet
Spring expands outwardly steel bar under contraction, until being contacted with internal surface of sleeve pipe, when the convergent force and casing wall of spring are to steel bar
Extruding when reaching balance, centralizer keeps stable.Therefore in whole coiled tubing above puies forward decentralization process, coiled tubing is helped
The DATA REASONING instrument at positive device upper-lower section end is prevented effectively from and contacted with casing wall all in sleeve pipe centre position.
（4）Part tubular leak source is generally less than normal, and the space that current pass through is very narrow, is visually difficult to discover, adds sleeve pipe
The closure of outside cement sheath, package action so that part leak source must can just have water seepage flow in the case where inside pipe casing pressurizes
To stratum, produce sleeve pipe and build the pressure the result of failure.Therefore DATA REASONING must be carried out in the confined space that water filling is pressurizeed every time.
Traditional device preceding water filling pressurization of measurement every time, pressure release upper lifting pipe post after measurement so not only considerably increases workload, and
Supercharging, pressure release repeatedly accelerates the strain of water-tight equipment, and accelerated ageing causes operating risk.The wellhead sealing device of the present invention has
Effect solves bobbin seal and the problem of tubing string is above carried, and the cone seal cushion rubber on top plays main seal, cone seal glue
Circle tightly wraps up coiled tubing, because the smooth characteristic in coiled tubing surface enables the situation that coiled tubing builds the pressure in sleeve pipe
It is lower smoothly above to carry, so that pressure release repeatedly is avoided, disassemblerassembler.The manual gate sealing device of bottom is closed when measurement data
Close, ensure sealed reliability.
Brief description of the drawings
Fig. 1 is the outside overall structure diagram of a preferred embodiment of the Casing Detection leak source device of the present invention；
Fig. 2 for Fig. 1 A-A to sectional view；
Fig. 3 is a Fig. 1 partial structural diagram；
Fig. 4 for Fig. 3 A-A to sectional view；
Fig. 5 is a Fig. 2 partial structural diagram；
Fig. 6 is Fig. 5 side view；
Fig. 7 is Fig. 2 another partial structural diagram；
Fig. 8 is Fig. 7 side view；
The two-dimentional vertical profile figure that Fig. 9 is formed for the Casing Detection leak source method measurement result according to the present invention.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Embodiment 1
To achieve these goals, the technical solution adopted by the present invention is：
As Figure 1-Figure 8, a kind of Casing Detection leak source device, including wellhead packer 1, coiled tubing centralizer 2 and data
Measuring instrument 3, wellhead packer 1 is connected with wellhead casing pipe 14, and the lower end of coiled tubing centralizer 2 and data measuring instrument are each attached to
On coiled tubing 4.
Wellhead packer 1 includes sealing device for upper portion of annular and sealer, and sealing device for upper portion of annular includes O-ring seal 5,
O-ring seal 5 is provided with top plate 6 and seal cover board 7, and wherein O-ring seal 5 is taper, 5 main seal functions of O-ring seal.
Cone seal cushion rubber 5 is extruded by the pressing force of top seal cover plate 7, causes the compression downwards of cone seal cushion rubber 7, it is overall to
Middle coiled tubing 4 is drawn close, tightly wrap up coiled tubing 4, it is ensured that coiled tubing 4 during moving up and down, sleeve pipe 14
Sealing.The main function of wellhead packer 1 is to guarantee to seal sleeve pipe 14, while coiled tubing 4 is in sleeve tube pressure situation
Under can move up and down.
Sealer includes flashboard 8 and right side containment member 9, and hand rotating disk 10 controls flashboard by linkage screw 11
8 unlatching.Sealer is auxiliary seal, is needed manually operated.In measurement data, the flashboard 8 of both sides is closed, it is ensured that surveyed
Sealing effectiveness during amount, when coiled tubing 4 is above carried, the flashboard 8 of both sides is opened, and is reduced coiled tubing 4 and is above carried in composition
Frictional force, the main purpose of flashboard 8 is to ensure sealed reliability and safety.
Coiled tubing centralizer 2 is in symmetrical structure up and down.Coiled tubing centralizer 2 is overall in lantern-shaped, including upper fixation
Ring 15 and lower retainer ring 16, lower retainer ring 16 are fixed on the outer wall of coiled tubing 4, moved up and down with coiled tubing 4, upper retainer ring 15
It is not fixed on the outer wall of coiled tubing 4.Upper retainer ring 15 and lower retainer ring 16 are connected by spring 12, upper retainer ring 15 and lower solid
The internal diameter appearance coiled tubing 4 for determining ring 16 passes through, and this outside upper retainer ring 15 and lower retainer ring 16 are also by the stronger steel bar of many toughness
13 connections, under the contraction of spring 12, vertical steel bar 13 is in outer throwing shape.
Coiled tubing centralizer 2 is stretched and the elongation and tension of steel bar 13 by spring 12, coiled tubing 4 is in lean-with
Put, and then DATA REASONING instrument is kept middle position in the sleeve pipe 14 by different inner diameters.Coiled tubing centralizer 2 is set
Put, on the one hand can avoid DATA REASONING instrument put on coiled tubing put during long-term friction and strenuous vibration cause
Device seal failure and inner body are impaired.On the other hand ultrasound data measuring instrument and internal surface of sleeve pipe in measurement process are prevented
Contact produces the receiving of disturbing influence ultrasonic signal, causes measurement error.
Ultrasound data measuring instrument in decentralization process is above put forward with coiled tubing, by swing influenceed easily with sleeve pipe 14
Wall is collided, and multiple shock friction will make DATA REASONING instrument surface damage, or cause interior instrument Long-term Vibration to fail.
In measurement process, DATA REASONING instrument contacts to produce to disturb with the inwall of sleeve pipe will influence normally receiving for ultrasonic signal.In height
Easily cause water to enter inside DATA REASONING instrument annular shields under pressure water environment, cause the short circuit of DATA REASONING instrument circuit, instrument
Device fails.Therefore centralizer 2 is helped the invention provides a kind of coiled tubing of reducing, tackled in measurement process middle sleeve 14
When footpath changes, acted on by the contraction of spring 12 and the diastole of toughness steel bar 13, keep coiled tubing to help centralizer about 2
The DATA REASONING instrument of section is in the centre position of sleeve pipe 14, is prevented effectively from and is contacted with casing wall.Ultrasound data measuring instrument it is main
Effect is the ultrasonic signal for gathering the place that fathoms.To ensure measurement accuracy, ultrasound data measuring instrument includes the first surpassing
Sonic data measuring instrument 31 and second ultrasound data measuring instrument, 32 liang of set measuring instruments, the first ultrasound data measuring instrument 31 and
Two ultrasound data measuring instruments 32 are provided with coiled tubing centralizer 2.In order to ensure detection speed, the Shang Tiqu of coiled tubing 4
Between be 10 meters, but in sleeve pipe 14 leak source go out ultrasonic signal propagation distance it is short, to avoid because the Shang Ti areas of coiled tubing 4
Between excessive and ultrasonic signal overlay area that miss leak source, so as to set two sets of detection means, i.e., two sets coiled tubings are helped
Positive device 2 and two sets of ultrasound data measuring instruments, the distance between two of which ultrasound data measuring instrument are fixed as 5 meters.With
Coiled tubing 4 above carries 10 meters and measured, and correspondence ultrasound data measuring instrument will have spot measurement data every 5 meters of intervals, from
And ensure DATA REASONING scope and Ultrasonic Radiation region is completely covered.Not only it ensure that the speed of detection but also improved the degree of accuracy.The
One ultrasound data measuring instrument 31 and the second ultrasound data measuring instrument 32 are fixed by protection device 17.First ultrasound
Wave number is symmetrical arranged according to the ultrasound data measuring instrument 32 of measuring instrument 31 and second.Protection device 17 is annular and is hollow setting.
First ultrasound data measuring instrument 31 includes the first ultrasonic wave receiving transducer 18, piezoelectric transducer, at data signal
Unit, data storage cell are managed, the second ultrasound data measuring instrument 32 includes the second ultrasonic wave receiving transducer 19, piezoelectric sensing
Device, digital signal processing unit, data storage cell, piezoelectric transducer, digital signal processing device, data storage cell all exist
The inner sealing of annular shields 17, it is to avoid high temperature, high pressure, the erosion of water.
The detection method of Casing Detection leak source device：
Step（1）Device enters before well, and checking the connection of ultrasound data measuring instrument, whether whether normal, information transfer is unobstructed, and
Whether well mouth sealing device is intact.Treat after the completion of device connection, ultrasound data measuring instrument is transferred into designated depth.
Step（2）Then start wellhead packer device 1, the seal cover board 7 above cone seal cushion rubber 5 is tightened, together
When manual closing sealer, that is, turn clockwise manual turntable 10, drive linkage screw 11 rotate so that flashboard 8
Closure, it is ensured that wellhead sealing；
Step（3）Ensure after wellhead sealing, the other end of coiled tubing 4 is connected with water flooding vehicle, by coiled tubing 4 to sleeve pipe
Water filling in 14, water flooding vehicle real-time tracking record well head pressure data, when well head pressure declines immediately toward well head water filling, when reaching
20Mpa pressure is to stop water filling immediately, ensures stable in 20Mpa in the whole well head pressure of measurement process middle sleeve 14；
Step（4）Now log-on data measuring instrument, while the ultrasonic signal of depth point where monitoring, when obtaining stable data
After signal, software systems automatic identification determines the point data, points out the point to be measured；
Step（5）And then by rotate counterclockwise manual turntable 10, sealer is opened, coiled tubing 4 is above carried 10
Rice, the manual turntable 10 that turns clockwise again seals sealer, starts the measurement of subsequent point, when the stable data of acquirement
Start the measurement of subsequent point afterwards, the like complete the measurement of full pit shaft；
Step（6）Pressure release after, takes out well inner sleeve detection leak source device；
Step（7）The data storage cell of ultrasound data measuring instrument is connected with calculator, reads depth, the ultrasound of measurement
Ripple signal data, judges sleeve pipe leak source.
According to fathoming and corresponding to ultrasonic signal data, two-dimentional vertical profile figure is formed, wherein ordinate represents frequency
Rate response coefficient,（Frequency response coefficient more praetersonic signal is stronger）, abscissa represents to fathom, from top to bottom well depth according to
Secondary increase.On the one hand because the ultrasonic signal propagation distance of leak source generation is shorter, the power of another aspect signal is with surveying
Amount point is to the distance of leak source into positive correlation, so according to the display on profile, and ultrasonic signal most strong point can be judged as
The leak source of sleeve pipe, as shown in Figure 1, as can be seen from the figure ultrasonic signal is most strong at 1300 meters, i.e. the leak source position of sleeve pipe
At 1300 meters.The present invention provides a kind of Casing Detection leak source apparatus and method, is measured using ultrasonic wave principle.Accurately
It is the premise of quick process accident to judge leak source depth, a kind of Casing Detection leak source apparatus and method that the present invention is provided, and is borrowed
The continuity of coiled tubing 4 greatly lifts the speed of measurement.Coiled tubing centralizer 2 makes DATA REASONING instrument be applied to drill holder
The measurement of pipe 14, overcomes conventional deficiency.Ultrasonic wave water dynamic effect has abnormal sensibility, the efficient quick, number of measurement simultaneously
According to the broad applicability and the reliability of test philosophy of measuring instrument so that the operation of detection leak source is easier, effective, has
Following beneficial effect：
（1）Ultrasonic wave has very strong penetrability as audio frequency, but compared with the sound wave of the audio frequency of identical energy, ultrasonic wave is passed
The distance broadcast is relatively short, when detecting ultrasonic signal, illustrates that detection, close to instrument leak source, improves precision.
（2）On the basis of wellhead packer 1 can be sealed and ensure that coiled tubing 4 is above carried, the length of coiled tubing 4 is borrowed
Feature, realizes in a high voltage state, the continuous measurement of data, it is ensured that the integrality of data improves operating efficiency.
Embodiment 2
With unlike embodiment 1, the detection method of Casing Detection leak source device comprises the following steps：
Step（1）Device enters before well, and checking the connection of ultrasound data measuring instrument, whether whether normal, information transfer is unobstructed, and
Whether well mouth sealing device is intact.Treat after the completion of device connection, ultrasound data measuring instrument is transferred into designated depth.
Step（2）Then start wellhead packer device 1, the seal cover board 7 above cone seal cushion rubber 5 is tightened, together
When manual closing sealer, that is, turn clockwise manual turntable 10, drive linkage screw 11 rotate so that flashboard 8
Closure, it is ensured that wellhead sealing；
Step（3）Ensure after wellhead sealing, the other end of coiled tubing is connected with water flooding vehicle, by coiled tubing 4 to sleeve pipe
Water filling in 14, water flooding vehicle real-time tracking record well head pressure data, when well head pressure declines immediately toward well head water filling, when reaching
20Mpa pressure is to stop water filling immediately, ensures stable in 20Mpa in the whole well head pressure of measurement process middle sleeve 14；
Step（4）Now log-on data measuring instrument, while the ultrasonic signal of depth point where monitoring, when obtaining stable data
After signal, software systems automatic identification determines the point data, points out the point to be measured；
Step（5）And then by rotate counterclockwise manual turntable 10, sealer is opened, coiled tubing 4 is above carried 8
Rice, the manual turntable 10 that turns clockwise again seals sealer, starts the measurement of subsequent point, when the stable data of acquirement
Start the measurement of subsequent point afterwards, the like complete the measurement of full pit shaft；
Step（6）Pressure release after, takes out well inner sleeve detection leak source device, by the data storage list of ultrasound data measuring instrument
Member is connected with calculator, reads depth, the ultrasonic signal data of measurement.
Embodiment 3
With unlike embodiment 1, the quantity of coiled tubing centralizer 2 be it is multiple, multiple coiled tubing centralizers 2 between the upper and lower every
Set, coiled tubing centralizer 2 is in symmetrical structure up and down.Coiled tubing centralizer 2 is overall in lantern-shaped, including upper retainer ring 15
With lower retainer ring 16, lower retainer ring 16 is fixed on the outer wall of coiled tubing 4, moved up and down with coiled tubing 4, and upper retainer ring 15 is not solid
It is scheduled on the outer wall of coiled tubing 4.Upper retainer ring 15 and lower retainer ring 16 are connected by spring 12, upper retainer ring 15 and lower retainer ring
16 internal diameter holds coiled tubing 4 and passed through, and this outside upper retainer ring 15 and lower retainer ring 16 are also connected by the stronger steel bar 13 of four toughness
Connect, under the contraction of spring 12, vertical steel bar 13 is in outer throwing shape.Coiled tubing centralizer 2 is stretched and steel by spring 12
The elongation and tension of bar 13, makes coiled tubing 4 be in middle position, and then make DATA REASONING instrument in the sleeve pipe 14 by different inner diameters
Middle position is kept, position of the measurement point in flow field is predefined, the position for fitting leak source provides foundation.
Embodiment 3
With unlike embodiment 1, the wellhead packer 1 includes packer body, and packer body lower part is additionally provided with pin thread
22, it is further ensured that the stability of wellhead packer 1.
Embodiment 4
With unlike embodiment 1, coiled tubing centralizer 2 is overall in lantern-shaped, including upper retainer ring 15 and lower retainer ring 16,
Retainer ring 15 and lower retainer ring 16 are connected by spring 12, and upper retainer ring 15 and lower retainer ring 16 are also by the stronger steel of four toughness
Bar 13 is connected, and four uniform intervals of steel bar 13 are set, under the contraction of spring 12, and vertical steel bar 13 is in outer throwing shape.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
It should all be included within the scope of the present invention.
Claims (10)
1. a kind of Casing Detection leak source device, it is characterised in that including wellhead packer, coiled tubing centralizer and DATA REASONING
Instrument, wellhead packer is connected with wellhead casing pipe, and coiled tubing centralizer and data measuring instrument are each attached on coiled tubing, described
Wellhead packer includes being provided with sealing device in packer body, packer body, and the coiled tubing centralizer includes upper solid
Determine ring and lower retainer ring, upper retainer ring and lower retainer ring are connected by spring members, DATA REASONING instrument includes the first ultrasonic wave number
According to measuring instrument and the second ultrasound data measuring instrument, the first ultrasound data measuring instrument and the second ultrasound data measuring instrument lead to
Overprotection device is fixed.
2. a kind of Casing Detection leak source device according to claim 1, it is characterised in that the sealing device includes top
Sealing device and sealer, sealing device for upper portion of annular include O-ring seal, and O-ring seal is provided with top plate and seal cover board.
3. a kind of Casing Detection leak source device according to claim 2, it is characterised in that the O-ring seal is tapered.
4. a kind of Casing Detection leak source device according to claim 1, it is characterised in that the sealer includes
Flashboard and right side containment member, hand rotating disk control the unlatching of flashboard by linkage screw.
5. a kind of Casing Detection leak source device according to claim 1, it is characterised in that the packer body lower part is also
Provided with pin thread.
6. a kind of Casing Detection leak source device according to claim 1, it is characterised in that the elastomeric element is spring.
7. a kind of Casing Detection leak source device according to claim 1, it is characterised in that the lower retainer ring is fixed on company
On continuous oil-pipe external wall, moved up and down with coiled tubing.
8. a kind of Casing Detection leak source device according to claim 1, it is characterised in that fixed ring and lower fixation
Steel bar is also associated between ring.
9. a kind of Casing Detection leak source device according to claim 8, it is characterised in that the quantity of the steel bar is four
Root, under the contraction of spring, vertical steel bar is in outer throwing shape.
10. a kind of detection method of Casing Detection leak source device using described in any of the above-described claim, it is characterised in that bag
Include following steps：
Step（1）Device enters before well, and checking the connection of ultrasound data measuring instrument, whether whether normal, information transfer is unobstructed, and
Whether well mouth sealing device is intact, treats after the completion of device connection, ultrasound data measuring instrument is transferred into designated depth；
Step（2）Start wellhead packer, the seal cover board above O-ring seal is tightened, while manual closing lower seal
Device, it is ensured that wellhead sealing；
Step（3）The water filling into sleeve pipe by coiled tubing, ensures and exists in whole measurement process middle sleeve well head pressure stabilization
20Mpa；
Step（4）Log-on data measuring instrument, while the ultrasonic signal of depth point where monitoring, when obtaining stable ultrasonic wave number
It is believed that number after, software systems automatic identification determines the point data, points out the point to be measured；
Step（5）Sealer is opened, coiled tubing is above carried to 10 meters, again sealer is sealed, started
The measurement of subsequent point, starts the measurement of subsequent point after stable ultrasound data signal is obtained, the like complete full pit shaft
Measurement；
Step（6）Pressure release, takes out the Casing Detection leak source device in well；
Step（7）The data storage cell of ultrasound data measuring instrument is connected with calculator, reads depth, the ultrasound of measurement
Ripple signal data.
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| CN114607313A (en) * | 2022-03-15 | 2022-06-10 | 陕西山秦能源技术服务有限公司 | Solid-phase-free gel plugging method |
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