CN114876448A - Method and device for positioning and detecting leakage point of shaft - Google Patents
Method and device for positioning and detecting leakage point of shaft Download PDFInfo
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- CN114876448A CN114876448A CN202210331755.4A CN202210331755A CN114876448A CN 114876448 A CN114876448 A CN 114876448A CN 202210331755 A CN202210331755 A CN 202210331755A CN 114876448 A CN114876448 A CN 114876448A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 82
- 238000005553 drilling Methods 0.000 abstract description 33
- 239000012530 fluid Substances 0.000 abstract description 24
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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 method and a device for positioning and detecting a leakage point of a shaft, wherein the method comprises the steps of positioning and detecting the leakage point in the shaft by a positioning and detecting device, wherein the positioning and detecting device comprises an axial ultrasonic detecting mechanism and a circumferential ultrasonic detecting mechanism; the axial ultrasonic detection mechanism comprises a first fixing rod, an axial ultrasonic generator and an axial ultrasonic receiver; the circumferential ultrasonic detection mechanism comprises a second fixing rod, a circumferential ultrasonic generator and a circumferential ultrasonic receiver. The invention has the beneficial effects that: the propagation time of the ultrasonic signal between the axial ultrasonic generator and the axial ultrasonic receiver is detected to obtain the distribution condition of the flow rate of the drilling fluid in the axial direction of the shaft, so that the occurrence depth of the lost circulation is obtained, meanwhile, the propagation time of the ultrasonic signal between the circumferential ultrasonic generator and the circumferential ultrasonic receiver is detected to obtain the difference of the flow rate of the drilling fluid in each direction, so that the circumferential direction of the lost circulation is obtained, and the leaking point is blocked conveniently.
Description
Technical Field
The invention relates to the technical field of lost circulation detection, in particular to a method and a device for positioning and detecting leakage points of a shaft.
Background
The well drilling is an important link of oil and gas exploitation, and in order to ensure efficient and safe well drilling and prevent lost circulation and blowout, slurry with certain bonding performance is required to be used as drilling fluid in the well drilling process. Due to the complexity of the underground stratum structure, the slurry leakage is caused by the frequent occurrence of cracks and stratum with pores, and after the slurry leakage occurs, the most important thing is to find out the leakage position as fast and accurately as possible so as to block the leakage point.
In the prior art, an ultrasonic transmitter and an ultrasonic receiver are fixed on a drill rod along the axial direction of the drill rod, and the propagation time of ultrasonic waves between the ultrasonic transmitter and the ultrasonic receiver is continuously measured in the moving process of the drill rod, so that the flow rate of drilling fluid is obtained through calculation, and the depth position of the suddenly increased flow rate is the depth position of the well leakage.
However, this method can only obtain the depth position of the lost circulation occurrence, and cannot obtain the circumferential position of the lost circulation occurrence (i.e., the orientation of the lost circulation occurrence position), which is not favorable for rapid treatment of the lost circulation.
Disclosure of Invention
In view of the above, it is necessary to provide a method and an apparatus for positioning and detecting a leakage point of a wellbore, so as to solve the technical problems that the existing method for positioning and detecting a leakage point of a wellbore can only obtain the depth position of the leakage occurrence, cannot obtain the circumferential position of the leakage occurrence, and is not beneficial to the rapid processing of the leakage.
In order to achieve the above object, the present invention provides a method for wellbore leak site location detection, comprising: carrying out leakage point positioning detection in a shaft by a positioning detection device, wherein the positioning detection device comprises an axial ultrasonic detection mechanism and a circumferential ultrasonic detection mechanism;
the axial ultrasonic detection mechanism comprises a first fixing rod, an axial ultrasonic generator and an axial ultrasonic receiver, wherein the axial ultrasonic generator and the axial ultrasonic receiver are fixed on the first fixing rod, the axial ultrasonic generator and the axial ultrasonic receiver are oppositely arranged, and a connecting line of the axial ultrasonic generator and the axial ultrasonic receiver is parallel to the first fixing rod;
the circumference ultrasonic detection mechanism comprises a second fixed rod, a circumference ultrasonic generator and a circumference ultrasonic receiver, the second fixed rod is coaxially and fixedly connected with the first fixed rod, the circumference ultrasonic generator reaches the circumference ultrasonic receiver is fixed on the second fixed rod, the circumference ultrasonic generator reaches the circumference ultrasonic receiver is oppositely arranged, and the connecting line of the circumference ultrasonic generator and the circumference ultrasonic receiver is intersected with the second fixed rod.
In some embodiments, the axial ultrasonic detection mechanism further includes a first position adjusting member, the first position adjusting member is a first micro cylinder, a cylinder body of the first micro cylinder is fixed to the first fixing rod, and an output shaft of the first micro cylinder is fixedly connected to the axial ultrasonic generator.
In some embodiments, the axial ultrasonic detection mechanism further includes a second position adjusting member, the second position adjusting member is a second micro cylinder, a cylinder body of the second micro cylinder is fixed to the first fixing rod, and an output shaft of the second micro cylinder is fixedly connected to the axial ultrasonic receiver.
In some embodiments, a first temperature detector and a first pressure detector are further fixed on the first fixing rod.
In some embodiments, the circumferential ultrasonic detection mechanism further includes a third position adjusting part, the third position adjusting part is a third micro cylinder, a cylinder body of the third micro cylinder is fixed to the second fixing rod, and an output shaft of the third micro cylinder is fixedly connected to the circumferential ultrasonic generator.
In some embodiments, the circumferential ultrasonic detection mechanism further comprises a fourth position adjusting part, the fourth position adjusting part is a fourth micro air cylinder, a cylinder body of the fourth micro air cylinder is fixed to the second fixing rod, and an output shaft of the fourth micro air cylinder is fixedly connected with the circumferential ultrasonic receiver.
In some embodiments, a second temperature detector and a second pressure detector are further fixed on the second fixing rod.
In some embodiments, the second retaining rod is a hollow structure and has an overflow lumen; the circumferential ultrasonic detection mechanism further comprises a first centralizer and a second centralizer, one end of the first centralizer is connected with the first fixing rod, the other end of the first centralizer is connected with one end of the second fixing rod, the first centralizer is provided with a flow inlet cavity communicated with the flow passing cavity, the side wall of the first centralizer is provided with a flow inlet hole communicated with the flow inlet cavity, one end of the second centralizer is connected with the other end of the second fixing rod, the second centralizer is provided with a flow outlet cavity communicated with the flow passing cavity, and the side wall of the second centralizer is provided with a flow outlet hole communicated with the flow outlet cavity; the circumferential ultrasonic generator and the circumferential ultrasonic receiver are arranged in the overflowing cavity.
In some embodiments, the positioning detection device further comprises a length adjusting member, the length of the length adjusting member is adjustable, one end of the length adjusting member is fixedly connected with the first fixing rod, and the other end of the length adjusting member is fixedly connected with the second fixing rod.
The invention also provides a device for positioning and detecting the shaft leakage point, which comprises an axial ultrasonic detection mechanism and a circumferential ultrasonic detection mechanism;
the axial ultrasonic detection mechanism comprises a first fixing rod, an axial ultrasonic generator and an axial ultrasonic receiver, wherein the axial ultrasonic generator and the axial ultrasonic receiver are fixed on the first fixing rod, the axial ultrasonic generator and the axial ultrasonic receiver are oppositely arranged, and a connecting line of the axial ultrasonic generator and the axial ultrasonic receiver is parallel to the first fixing rod;
the circumference ultrasonic detection mechanism comprises a second fixed rod, a circumference ultrasonic generator and a circumference ultrasonic receiver, the second fixed rod is coaxially and fixedly connected with the first fixed rod, the circumference ultrasonic generator reaches the circumference ultrasonic receiver is fixed on the second fixed rod, the circumference ultrasonic generator reaches the circumference ultrasonic receiver is oppositely arranged, and the connecting line of the circumference ultrasonic generator and the circumference ultrasonic receiver is intersected with the second fixed rod.
Compared with the prior art, the technical scheme provided by the invention has the beneficial effects that: when the drilling machine is used, the first fixing rod is coaxially fixed on the drill rod and is lowered into a shaft along with the drill rod, in the process, the axial ultrasonic generator continuously sends out ultrasonic signals and is received by the axial ultrasonic receiver, the circumferential ultrasonic generator continuously sends out ultrasonic signals and is received by the circumferential ultrasonic receiver, the distribution condition of the flow velocity of the drilling fluid in the shaft axial direction can be obtained by detecting the propagation time of the ultrasonic signals between the axial ultrasonic generator and the axial ultrasonic receiver, so that the depth of well leakage is obtained, meanwhile, as the drill rod continuously rotates, the propagation time of the ultrasonic signals between the circumferential ultrasonic generator and the circumferential ultrasonic receiver is detected in all directions, the difference of the flow velocity of the drilling fluid in all directions can be obtained, and the flow direction of the drilling fluid in the horizontal direction can be judged, thereby obtain the circumferential direction that the lost circulation takes place to combine with the degree of depth that the lost circulation takes place, thereby can obtain the specific degree of depth and the circumferential direction that the lost circulation takes place, so that block up the leak source.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a positioning detection apparatus provided in the present invention;
FIG. 2 is an exploded view of the position detection apparatus of FIG. 1;
FIG. 3 is a schematic structural view of the axial ultrasonic testing mechanism of FIG. 1;
FIG. 4 is an enlarged partial view of area A of FIG. 3;
FIG. 5 is an enlarged partial view of area B of FIG. 3;
FIG. 6 is a schematic structural view of the circumferential ultrasonic detection mechanism of FIG. 1;
FIG. 7 is an enlarged partial view of area C of FIG. 6;
FIG. 8 is an enlarged partial view of region D of FIG. 6;
FIG. 9 is a schematic view of the length adjuster of FIG. 1;
FIG. 10 is an enlarged partial view of area E of FIG. 9;
in the figure: 1-axial ultrasonic detection mechanism, 2-circumferential ultrasonic detection mechanism, 3-length adjusting piece, 11-first fixed rod, 111-first temperature detector, 112-first pressure detector, 12-axial ultrasonic generator, 13-axial ultrasonic receiver, 14-first position adjusting piece, 15-second position adjusting piece, 21-second fixed rod, 211-second temperature detector, 212-second pressure detector, 213-overflowing cavity, 22-circumferential ultrasonic generator, 23-circumferential ultrasonic receiver, 24-third position adjusting piece, 25-fourth position adjusting piece, 26-first centralizer, 261-inflow hole, 27-second centralizer, 271-outflow hole, 28-protective joint, 31-hydraulic cylinder, 32-first sealing ring, 33-second sealing ring.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
Referring to fig. 1 and 2, the present invention provides a method for detecting a location of a leakage point of a wellbore, comprising: and carrying out leakage point positioning detection in the shaft by a positioning detection device, wherein the positioning detection device comprises an axial ultrasonic detection mechanism 1 and a circumferential ultrasonic detection mechanism 2.
Referring to fig. 3 to 5, the axial ultrasonic detection mechanism 1 includes a first fixing rod 11, an axial ultrasonic generator 12 and an axial ultrasonic receiver 13, the axial ultrasonic generator 12 and the axial ultrasonic receiver 13 are both fixed to the first fixing rod 11, the axial ultrasonic generator 12 and the axial ultrasonic receiver 13 are disposed opposite to each other, and a connection line between the axial ultrasonic generator 12 and the axial ultrasonic receiver 13 is parallel to the first fixing rod 11. The flow velocity of the drilling fluid in the axial direction of the well bore can be obtained through the propagation time of the ultrasonic signal between the axial ultrasonic generator 12 and the axial ultrasonic receiver 13.
Referring to fig. 3, 6, 7 and 8, the circumferential ultrasonic detection mechanism 2 includes a second fixing rod 21, a circumferential ultrasonic generator 22 and a circumferential ultrasonic receiver 23, the second fixing rod 21 is coaxially and fixedly connected to the first fixing rod 11, the circumferential ultrasonic generator 22 and the circumferential ultrasonic receiver 23 are both fixed to the second fixing rod 21, the circumferential ultrasonic generator 22 and the circumferential ultrasonic receiver 23 are disposed opposite to each other, and a connection line between the circumferential ultrasonic generator 22 and the circumferential ultrasonic receiver is intersected with the second fixing rod 21. In this embodiment, an included angle between a connection line between the circumferential ultrasonic generator 22 and the circumferential ultrasonic receiver 23 and the second fixing rod 21 is 30 °, so that propagation time of an ultrasonic signal between the circumferential ultrasonic generator 22 and the circumferential ultrasonic receiver 23 can reflect a flow velocity of a drilling fluid in an axial direction of a wellbore and can also reflect a flow velocity of the drilling fluid in the circumferential direction of the wellbore, and the propagation time can be mutually corrected with the axial ultrasonic generator 12 and the axial flow velocity detected by the axial ultrasonic receiver 13.
When the drilling tool is used, the first fixing rod 11 is coaxially fixed on a drilling rod and is lowered into a shaft along with the drilling rod, in the process, the axial ultrasonic generator 12 continuously sends out an ultrasonic signal and is received by the axial ultrasonic receiver 13, the circumferential ultrasonic generator 22 continuously sends out an ultrasonic signal and is received by the circumferential ultrasonic receiver 23, wherein the distribution condition of the flow rate of the drilling fluid in the shaft axial direction can be obtained by detecting the propagation time of the ultrasonic signal between the axial ultrasonic generator 12 and the axial ultrasonic receiver 13, so that the depth of the well leakage is obtained, meanwhile, as the drilling rod continuously rotates, the propagation time of the ultrasonic signal between the circumferential ultrasonic generator 22 and the circumferential ultrasonic receiver 23 is detected in all directions, the difference of the flow rate of the drilling fluid in all directions can be obtained, and the flow direction of the drilling fluid in the horizontal direction can be judged, thereby obtain the circumferential direction that the lost circulation takes place to combine with the degree of depth that the lost circulation takes place, thereby can obtain the specific degree of depth and the circumferential direction that the lost circulation takes place, so that block up the leak source.
In order to improve the accuracy of the detection result of the axial ultrasonic detection mechanism 1, please refer to fig. 3-5, in a preferred embodiment, the axial ultrasonic testing mechanism 1 further comprises a first position adjusting member 14, the first position adjusting part 14 is a first micro cylinder, the cylinder body of the first micro cylinder is fixed on the first fixing rod 11, the output shaft of the first micro cylinder is fixedly connected with the axial ultrasonic generator 12, in use, the position of the axial sonotrode 12 can be adjusted by the first position adjustment member 14, thereby changing the distance between the axial ultrasonic generator 12 and the axial ultrasonic receiver 13, by repeatedly detecting the propagation time of the ultrasonic signal between the axial ultrasonic generator 12 and the axial ultrasonic receiver 13 under the condition of multiple groups of distances, the accuracy of the finally obtained flow velocity of the drilling fluid in the axial direction is higher.
In order to improve the accuracy of the detection result of the axial ultrasonic detection mechanism 1, please refer to fig. 3-5, in a preferred embodiment, the axial ultrasonic testing mechanism 1 further comprises a second position adjusting member 15, the second position adjusting part 15 is a second micro cylinder, the cylinder body of the second micro cylinder is fixed on the first fixing rod 11, the output shaft of the second microcylinder is fixedly connected with the axial ultrasonic receiver 13, in use, the position of the axial ultrasonic receiver 13 can be adjusted by the second position adjustment member 15, thereby changing the distance between the axial ultrasonic generator 12 and the axial ultrasonic receiver 13, by repeatedly detecting the propagation time of the ultrasonic signal between the axial ultrasonic generator 12 and the axial ultrasonic receiver 13 under the condition of multiple groups of distances, the accuracy of the finally obtained flow velocity of the drilling fluid in the axial direction is higher.
In order to improve the accuracy of determining the position of the lost circulation, referring to fig. 3 to 5, in a preferred embodiment, a first temperature detector 111 and a first pressure detector 112 are further fixed on the first fixing rod 11, and the depth of the lost circulation can be determined by detecting a temperature value and a pressure value respectively obtained by the first temperature detector 111 and the first pressure detector 112, which has the following specific principle: the temperature value and the pressure value at the position where the lost circulation occurs usually have sudden changes, and the depth of the lost circulation can be judged in an auxiliary manner according to the sudden changes of the temperature value and the pressure value.
In order to improve the accuracy of the detection result of the circumferential ultrasonic detection mechanism 2, referring to fig. 6 to 8, in a preferred embodiment, the circumferential ultrasonic detection mechanism 2 further includes a third position adjusting member 24, the third position adjusting member 24 is a third micro cylinder, a cylinder body of the third micro cylinder is fixed to the second fixing rod 21, and an output shaft of the third micro cylinder is fixedly connected to the circumferential ultrasonic generator 22. When the device is used, the position of the circumferential ultrasonic generator 22 can be adjusted through the third position adjusting piece 24, so that the distance between the circumferential ultrasonic generator 22 and the circumferential ultrasonic receiver 23 is changed, and the accuracy of the finally obtained flow velocity of the drilling fluid in the circumferential direction can be higher by repeatedly detecting the propagation time of the ultrasonic signal between the circumferential ultrasonic generator 22 and the circumferential ultrasonic receiver 23 under the condition of multiple groups of distances.
In order to improve the accuracy of the detection result of the circumferential ultrasonic detection mechanism 2, referring to fig. 6 to 8, in a preferred embodiment, the circumferential ultrasonic detection mechanism 2 further includes a fourth position adjusting member 25, the fourth position adjusting member 25 is a fourth micro cylinder, a cylinder body of the fourth micro cylinder is fixed to the second fixing rod 21, and an output shaft of the fourth micro cylinder is fixedly connected to the circumferential ultrasonic receiver 23. When the device is used, the position of the circumferential ultrasonic receiver 23 can be adjusted through the fourth position adjusting part 25, so that the distance between the circumferential ultrasonic generator 22 and the circumferential ultrasonic receiver 23 is changed, and the accuracy of the finally obtained flow speed of the drilling fluid in the circumferential direction can be higher by repeatedly detecting the propagation time of the ultrasonic signal between the circumferential ultrasonic generator 22 and the circumferential ultrasonic receiver 23 under the condition of multiple groups of distances.
In order to improve the accuracy of determining the position of the lost circulation, referring to fig. 6 to 8, in a preferred embodiment, a second temperature detector 211 and a second pressure detector 212 are further fixed on the second fixing rod 21, and the depth of the lost circulation can be determined by detecting a temperature value and a pressure value respectively obtained by the second temperature detector 211 and the second pressure detector 212, which has the following specific principle: the temperature value and the pressure value at the position where the lost circulation occurs usually have sudden changes, and the depth of the lost circulation can be judged in an auxiliary manner according to the sudden changes of the temperature value and the pressure value.
In order to improve the accuracy of the detection result of the circumferential ultrasonic detection mechanism 2, referring to fig. 6-8, in a preferred embodiment, the second fixing rod 21 is a hollow structure and has a flow-through cavity 213. The circumferential ultrasonic detection mechanism 2 further comprises a first centralizer 26 and a second centralizer 27, one end of the first centralizer 26 is connected with the first fixing rod 11, the other end of the first centralizer 26 is connected with one end of the second fixing rod 21, the first centralizer 26 is provided with an inflow cavity communicated with the overflowing cavity 213, an inflow hole 261 communicated with the inflow cavity is formed in the side wall of the first centralizer 26, one end of the second centralizer 27 is connected with the other end of the second fixing rod 21, the second centralizer 27 is provided with an outflow cavity communicated with the overflowing cavity 213, and an outflow hole 271 communicated with the outflow cavity is formed in the side wall of the second centralizer 27. Circumference supersonic generator 22 reaches circumference ultrasonic receiver 23 all set up in the cavity 213 of overflowing, when using, when second dead lever 21 follows the drilling rod and rotates, the orientation of influent hole 261 can change, when influent hole 261 is towards the rivers direction, the discharge that gets into the cavity 213 of overflowing from influent hole 261 is the biggest, when influent hole 261 is the rivers direction dorsad, the discharge that gets into the cavity 213 of overflowing from influent hole 261 is the minimum, thereby can be according to the change of the velocity of flow that circumference supersonic generator 22 and circumference ultrasonic receiver 23 measured and obtain, judge the flow direction of drilling fluid, thereby be convenient for judge the circumference position that the lost circulation takes place.
With continued reference to fig. 6-8, the lower end of the second centralizer 27 is connected to a protection joint 28, and the protection joint 28 is used to prevent the damage to the internal components of the device when the device impacts other objects at the bottom during the detection process, thereby protecting the device.
In order to facilitate the adjustment of the distance between the axial ultrasonic detection mechanism 1 and the circumferential ultrasonic detection mechanism 2, please refer to fig. 1, fig. 2, fig. 9, and fig. 10, in a preferred embodiment, the positioning detection apparatus further includes a length adjustment member 3, the length of the length adjustment member 3 is adjustable, one end of the length adjustment member 3 is fixedly connected to the first fixing rod 11, and the other end of the length adjustment member 3 is fixedly connected to the second fixing rod 21. When in use, the distance between the axial ultrasonic detection mechanism 1 and the circumferential ultrasonic detection mechanism 2 can be adjusted, so that different detection conditions can be adapted.
To realize the function of the length adjusting member 3, please refer to fig. 1, 2, 9 and 10, in a preferred embodiment, the length adjusting member 3 is a hydraulic cylinder 31, a cylinder body of the hydraulic cylinder 31 is fixedly connected to the first fixing rod 11, and an output shaft of the hydraulic cylinder 31 is fixedly connected to the second fixing rod 21. In order to improve the waterproof effect of the hydraulic cylinder 31, a first seal ring 32 is provided in the hydraulic cylinder 31, and a second seal ring 33 is provided outside the hydraulic cylinder 31. Thereby in the use of pneumatic cylinder 31, can carry out preliminary interception to external impurity through second sealing washer 33, effectually avoid impurity to enter into the inside of pneumatic cylinder 31, and can pass through first sealing washer 32, further interception processing is carried out to the dust impurity that accidentally passes second sealing washer 33 and enter into in the pneumatic cylinder 31 to further improvement the sealed effect of pneumatic cylinder 31, prolonged the life of pneumatic cylinder 31.
The invention also provides a device for positioning and detecting the shaft leakage point, which comprises an axial ultrasonic detection mechanism 1 and a circumferential ultrasonic detection mechanism 2. The axial ultrasonic detection mechanism 1 comprises a first fixing rod 11, an axial ultrasonic generator 12 and an axial ultrasonic receiver 13, wherein the axial ultrasonic generator 12 and the axial ultrasonic receiver 13 are fixed on the first fixing rod 11, the axial ultrasonic generator 12 and the axial ultrasonic receiver 13 are oppositely arranged, and connecting lines of the axial ultrasonic generator 12 and the axial ultrasonic receiver 13 are parallel to the first fixing rod 11. The flow velocity of the drilling fluid in the axial direction of the well bore can be obtained through the propagation time of the ultrasonic signal between the axial ultrasonic generator 12 and the axial ultrasonic receiver 13. Circumference ultrasonic testing mechanism 2 includes second dead lever 21, circumference supersonic generator 22 and circumference ultrasonic receiver 23, second dead lever 21 with the coaxial fixed connection of first dead lever 11, circumference supersonic generator 22 reaches circumference ultrasonic receiver 23 all is fixed in second dead lever 21, circumference supersonic generator 22 reaches circumference ultrasonic receiver 23 sets up relatively, and the two line with second dead lever 21 is crossing.
For better understanding of the present invention, the technical solutions provided by the present invention are described in detail below with reference to fig. 1 to 10: when in use, the first fixing rod 11 is coaxially fixed on a drill rod and is lowered into a shaft along with the drill rod, in the process, the axial ultrasonic generator 12 continuously sends out an ultrasonic signal and is received by the axial ultrasonic receiver 13, the circumferential ultrasonic generator 22 continuously sends out an ultrasonic signal and is received by the circumferential ultrasonic receiver 23, wherein the distribution condition of the flow rate of the drilling fluid in the shaft axial direction can be obtained by detecting the propagation time of the ultrasonic signal between the axial ultrasonic generator 12 and the axial ultrasonic receiver 13, so that the depth of the lost circulation can be obtained, meanwhile, the distance between the axial ultrasonic generator 12 and the axial ultrasonic receiver 13 is changed through the second position adjusting piece 15 and/or the third position adjusting piece 15, so that the propagation time of the ultrasonic signal between the axial ultrasonic generator 12 and the axial ultrasonic receiver 13 is repeatedly detected under the condition of a plurality of groups of distances, the accuracy of the flow velocity of the drilling fluid in the axial direction is higher; meanwhile, as the drill rod rotates continuously, the propagation time of the ultrasonic signal between the circumferential ultrasonic generator 22 and the circumferential ultrasonic receiver 23 is detected in each direction, and the distance between the circumferential ultrasonic generator 22 and the circumferential ultrasonic receiver 23 is changed through the third position adjusting part 24 and/or the fourth position adjusting part 25, so that the propagation time of the ultrasonic signal between the circumferential ultrasonic generator 22 and the circumferential ultrasonic receiver 23 is repeatedly detected under the condition of multiple groups of distances, the accuracy of the flow rate of the drilling fluid in the circumferential direction is higher, the difference of the flow rate of the drilling fluid in each direction can be obtained, the flow direction of the drilling fluid in the horizontal direction can be judged, the circumferential direction of the leakage occurrence can be obtained, and the depth combination with the leakage occurrence can be obtained, and the specific depth and circumferential direction of the leakage occurrence can be obtained, in order to block the leak point.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. A method for wellbore leak site location detection, comprising: carrying out leakage point positioning detection in a shaft by a positioning detection device, wherein the positioning detection device comprises an axial ultrasonic detection mechanism and a circumferential ultrasonic detection mechanism;
the axial ultrasonic detection mechanism comprises a first fixing rod, an axial ultrasonic generator and an axial ultrasonic receiver, wherein the axial ultrasonic generator and the axial ultrasonic receiver are fixed on the first fixing rod, the axial ultrasonic generator and the axial ultrasonic receiver are oppositely arranged, and a connecting line of the axial ultrasonic generator and the axial ultrasonic receiver is parallel to the first fixing rod;
the circumference ultrasonic detection mechanism comprises a second fixed rod, a circumference ultrasonic generator and a circumference ultrasonic receiver, the second fixed rod is coaxially and fixedly connected with the first fixed rod, the circumference ultrasonic generator reaches the circumference ultrasonic receiver is fixed on the second fixed rod, the circumference ultrasonic generator reaches the circumference ultrasonic receiver is oppositely arranged, and the connecting line of the circumference ultrasonic generator and the circumference ultrasonic receiver is intersected with the second fixed rod.
2. The method for wellbore leak site location detection as recited in claim 1, wherein the axial ultrasonic detection mechanism further comprises a first position adjusting member, the first position adjusting member is a first micro cylinder, a cylinder body of the first micro cylinder is fixed to the first fixing rod, and an output shaft of the first micro cylinder is fixedly connected to the axial ultrasonic generator.
3. The method for wellbore leak site location detection as recited in claim 1, wherein the axial ultrasonic detection mechanism further comprises a second position adjustment member, the second position adjustment member is a second micro-cylinder, a cylinder body of the second micro-cylinder is fixed to the first fixing rod, and an output shaft of the second micro-cylinder is fixedly connected to the axial ultrasonic receiver.
4. The method for wellbore leak site location detection of claim 1, wherein the first stationary rod further has a first temperature detector and a first pressure detector secured thereto.
5. The method for wellbore leak site location detection according to claim 1, wherein the circumferential ultrasonic detection mechanism further comprises a third position adjusting member, the third position adjusting member is a third micro cylinder, a cylinder body of the third micro cylinder is fixed to the second fixing rod, and an output shaft of the third micro cylinder is fixedly connected to the circumferential ultrasonic generator.
6. The method for wellbore leak site location detection as recited in claim 1, wherein the circumferential ultrasonic detection mechanism further comprises a fourth position adjusting member, the fourth position adjusting member is a fourth micro cylinder, a cylinder body of the fourth micro cylinder is fixed to the second fixing rod, and an output shaft of the fourth micro cylinder is fixedly connected to the circumferential ultrasonic receiver.
7. The method for wellbore leak site location detection of claim 1, wherein a second temperature detector and a second pressure detector are further secured to the second securing rod.
8. The method for wellbore leak site location detection as recited in claim 1, wherein the second stationary rod is a hollow structure and has an overflow lumen;
the circumferential ultrasonic detection mechanism further comprises a first centralizer and a second centralizer, one end of the first centralizer is connected with the first fixing rod, the other end of the first centralizer is connected with one end of the second fixing rod, the first centralizer is provided with a flow inlet cavity communicated with the flow passing cavity, the side wall of the first centralizer is provided with a flow inlet hole communicated with the flow inlet cavity, one end of the second centralizer is connected with the other end of the second fixing rod, the second centralizer is provided with a flow outlet cavity communicated with the flow passing cavity, and the side wall of the second centralizer is provided with a flow outlet hole communicated with the flow outlet cavity;
the circumferential ultrasonic generator and the circumferential ultrasonic receiver are arranged in the overflowing cavity.
9. The method for wellbore leak site location detection of claim 1, wherein the location detection device further comprises a length adjustment member, the length adjustment member having an adjustable length, one end of the length adjustment member being fixedly connected to the first fixed rod and the other end of the length adjustment member being fixedly connected to the second fixed rod.
10. A device for positioning and detecting leakage points of a shaft is characterized by comprising an axial ultrasonic detection mechanism and a circumferential ultrasonic detection mechanism;
the axial ultrasonic detection mechanism comprises a first fixing rod, an axial ultrasonic generator and an axial ultrasonic receiver, wherein the axial ultrasonic generator and the axial ultrasonic receiver are fixed on the first fixing rod, the axial ultrasonic generator and the axial ultrasonic receiver are oppositely arranged, and a connecting line of the axial ultrasonic generator and the axial ultrasonic receiver is parallel to the first fixing rod;
the circumference ultrasonic detection mechanism comprises a second fixed rod, a circumference ultrasonic generator and a circumference ultrasonic receiver, the second fixed rod is coaxially and fixedly connected with the first fixed rod, the circumference ultrasonic generator reaches the circumference ultrasonic receiver is fixed on the second fixed rod, the circumference ultrasonic generator reaches the circumference ultrasonic receiver is oppositely arranged, and the connecting line of the circumference ultrasonic generator and the circumference ultrasonic receiver is intersected with the second fixed rod.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210331755.4A CN114876448A (en) | 2022-03-30 | 2022-03-30 | Method and device for positioning and detecting leakage point of shaft |
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| CN202210331755.4A CN114876448A (en) | 2022-03-30 | 2022-03-30 | Method and device for positioning and detecting leakage point of shaft |
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| CN202210331755.4A Pending CN114876448A (en) | 2022-03-30 | 2022-03-30 | Method and device for positioning and detecting leakage point of shaft |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704249A (en) * | 2022-03-31 | 2022-07-05 | 中国石油天然气股份有限公司 | Lost circulation detection device |
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2022
- 2022-03-30 CN CN202210331755.4A patent/CN114876448A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704249A (en) * | 2022-03-31 | 2022-07-05 | 中国石油天然气股份有限公司 | Lost circulation detection device |
| WO2023184941A1 (en) * | 2022-03-31 | 2023-10-05 | 中国石油天然气股份有限公司 | Lost circulation detection device |
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