CN109386274B - Detection device for diameter measurement while drilling ultrasonic transducer - Google Patents

Detection device for diameter measurement while drilling ultrasonic transducer Download PDF

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Publication number
CN109386274B
CN109386274B CN201710684122.0A CN201710684122A CN109386274B CN 109386274 B CN109386274 B CN 109386274B CN 201710684122 A CN201710684122 A CN 201710684122A CN 109386274 B CN109386274 B CN 109386274B
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China
Prior art keywords
connecting body
drilling
ultrasonic transducer
detection device
reflecting element
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CN201710684122.0A
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CN109386274A (en
Inventor
吴金平
陆黄生
张卫
倪卫宁
吴海燕
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China Petroleum and Chemical Corp
Sinopec Research Institute of Petroleum Engineering
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China Petroleum and Chemical Corp
Sinopec Research Institute of Petroleum Engineering
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00Survey of boreholes or wells
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00Survey of boreholes or wells
    • E21B47/01Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like

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  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Geophysics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)

Abstract

The invention relates to a detection device for a diameter measurement while drilling ultrasonic transducer. The diameter measurement while drilling ultrasonic transducer is arranged on the drill collar. The detection device comprises a combined clamp which is arranged on the outer wall of the drill collar and is composed of two semicircular supports, and a reflection element which is embedded in the combined clamp and is aligned with the MWD ultrasonic transducer in the radial direction, wherein an ultrasonic coupling agent layer is arranged on the end face, facing the MWD ultrasonic transducer, of the reflection element.

Description

Detection device for diameter measurement while drilling ultrasonic transducer
Technical Field
The invention relates to the field of petroleum and natural gas drilling, in particular to a detection device of an ultrasonic transducer for diameter measurement while drilling.
Background
The ultrasonic borehole diameter logging instrument while drilling is a borehole wall ultrasonic logging instrument for evaluating borehole conditions based on an ultrasonic pulse reflection method under the condition while drilling. The ultrasonic caliper logging-while-drilling tool can measure the borehole information of different depth positions in time in the drilling process, and can visually display in the forms of curves, images and the like. This information helps optimize drilling parameters, improve drilling quality, increase drilling time, reduce drilling costs, and provide the necessary parameters for borehole environment correction for other logs.
The ultrasonic logging-while-drilling tool mainly comprises a logging-while-drilling ultrasonic transducer, a direction measurement sensor, an underground electronic system, a battery pack and the like. These components are mounted in-line inside the drill collar. The MWD ultrasonic transducer works in a self-generating and self-receiving mode, is one of core components of the instrument, and directly influences the reliability and stability of the measurement result of the instrument. Meanwhile, the ultrasonic transducer for diameter measurement while drilling is wholly sealed in a groove which is uniformly distributed in the circumferential direction on the outer wall of the drill collar, and only one side of the radiation surface is exposed in the drilling fluid and is directly contacted with a propagation medium. Therefore, the installation structure brings great difficulty to the on-site rapid detection of the performance of the ultrasonic transducer for diameter measurement while drilling, and the quality of the ultrasonic transducer for diameter measurement and the consistency between the ultrasonic transducer for diameter measurement cannot be accurately evaluated.
At present, the existing ultrasonic transducer detection technology mainly utilizes a positioning system or a crane device to measure impulse response in an indoor half-space or a hollow pipe filled with water. The ultrasonic transducer detection technology has many problems in the application process, for example, the detection method is complex, time-consuming, low in efficiency and high in cost, and the detection of the diameter measurement while drilling ultrasonic transducer installed in a several-ton drill collar is more complicated and inconvenient. Meanwhile, the drill collar is difficult to carry. Therefore, the existing ultrasonic transducer detection technology is not suitable for rapidly detecting the performance of the on-site diameter measurement while drilling ultrasonic transducer.
CN2685569Y discloses an ultrasonic caliper. The ultrasonic well diameter measuring instrument comprises an upper sealing connector, a lower sealing connector, a sensor array pressure-bearing fixed shell, sensors with different functions and the like. The ultrasonic well diameter measuring instrument adopts the technical scheme that mounting holes which are uniformly distributed are formed in a sensor array pressure-bearing fixed shell, and ultrasonic radius measuring sensors are arranged on the mounting holes for non-contact measurement. Although the structure can reduce the measurement error to a certain extent, and can be freely measured upwards and downwards. However, the ultrasonic caliper is complex in structure, high in requirement for installation accuracy of each sensor, and difficult in processing and assembling processes. And each sensor is easily damaged by the influence of the environment in the use process, the maintenance cost is high, and the service life is short.
Disclosure of Invention
In view of at least some of the above-mentioned technical problems, the present invention aims to provide a detection apparatus for a caliper while drilling ultrasonic transducer. Before the well site is drilled or after the well site is drilled, the detection device can quickly and efficiently detect the pulse echo of the while-drilling diameter measuring ultrasonic transducer built in the while-drilling ultrasonic borehole diameter logging instrument, and further can accurately evaluate the quality of a plurality of while-drilling diameter measuring ultrasonic transducers and the consistency between the plurality of while-drilling diameter measuring ultrasonic transducers on site.
To this end, according to the present invention, a detection apparatus for a diameter measurement while drilling ultrasonic transducer is provided. The diameter measurement while drilling ultrasonic transducer is arranged on the drill collar. The detection device comprises a combined clamp which is arranged on the outer wall of the drill collar and is composed of two semicircular supports, and a reflection element which is embedded in the combined clamp and is aligned with the MWD ultrasonic transducer in the radial direction, wherein an ultrasonic coupling agent layer is arranged on the end face, facing the MWD ultrasonic transducer, of the reflection element.
In a preferred embodiment, a radial through hole is provided in the semicircular holder through the holder wall, the reflecting element being mounted in the radial through hole.
In a preferred embodiment, the reflective element is a cylindrical structure comprising a first connecting body at a radially inner side and a second connecting body at a radially outer side.
In a preferred embodiment, the first connector and the second connector are bonded to each other by an adhesive.
In a preferred embodiment, the first connecting body of the reflective element is made of an organic polymer material, and the second connecting body is made of a metal material.
In a preferred embodiment, the second connecting body is provided with a screw cap at its radially outer end and with an external thread in the region close to the screw cap.
In a preferred embodiment, an inner thread is provided on the inner surface of the radial through hole of the semicircular bracket near the outer side for mating with the outer thread of the second connecting body of the reflecting element.
In a preferred embodiment, the semicircular bracket includes protruding edge portions at both ends, and hinge holes and through holes are respectively formed at the protruding edge portions.
In a preferred embodiment, the semicircular bracket is connected by a hinge and a bolt to form the modular fixture.
In a preferred embodiment, the semicircular bracket of the modular fixture is made of a teflon material.
Drawings
The invention will now be described with reference to the accompanying drawings.
FIG. 1 is a sectional view showing the structure of a device for detecting while-drilling ultrasonic transducers according to the present invention mounted on a drill collar with a built-in while-drilling ultrasonic transducer.
Fig. 2 shows the structure of the detection device of the ultrasonic transducer for diameter measurement while drilling according to the invention.
Fig. 3 shows the structure of the reflecting element in the detecting device shown in fig. 2.
In the present application, the drawings are all schematic and are used only for illustrating the principles of the invention and are not drawn to scale.
Detailed Description
The invention is described below with reference to the accompanying drawings.
FIG. 1 shows a cross-sectional view of a device 100 for detecting while-drilling ultrasonic transducers according to the present invention mounted on a drill collar 170 with a built-in while-drilling ultrasonic transducer 180. Wherein the ultrasonic logging while drilling tool comprises a ultrasonic transducer 180 for logging while drilling mounted on a drill collar 170. In the example shown in FIG. 1, three while-drilling ultrasonic transducers 180 mounted on the outer wall of the drill collar 170 are provided, the three while-drilling ultrasonic transducers 180 being evenly spaced apart along the circumference of the drill collar 170. It will be readily appreciated that more or fewer while-drilling ultrasonic transducers 180 may be mounted on the outer wall of the drill collar 170, as desired.
As shown in FIG. 1, the detection device 100 of the MWD ultrasonic transducer comprises a modular fixture 1 which is mounted on the outer wall of a drill collar 170 and is composed of two semicircular brackets 11 and 12. The two semicircular brackets 11 and 12 are connected by a hinge 13 and a bolt 14 disposed at both ends of the semicircular brackets 11 and 12, thereby forming the modular jig 1. The two semicircular brackets 11 and 12 of the modular fixture 1 can be fastened to the outer wall of the drill collar 170 by adjusting the bolts 14.
Fig. 2 shows a schematic structural diagram of a detection apparatus 100 of a diameter measurement while drilling ultrasonic transducer according to the present invention. As shown in fig. 2, two semicircular brackets 11 and 12 are combined to form the modular fixture 1. Radial through holes 15 penetrating through the bracket walls are circumferentially provided on the semicircular brackets 11 and 12. In the embodiment shown, a total of three radial through holes 15 are provided. The radial through holes 15 of the semicircular brackets 11 and 12 are uniformly distributed in the circumferential direction of the modular fixture 1.
In the present embodiment, the semicircular bracket 11 includes a bracket body portion 111 having a semicircular shape, and two flange portions 112 and 113 respectively located on both sides of the bracket body portion 111. The flange portion 112 is formed with a hinge hole (not shown) for mounting the hinge 13. A through hole 116 is formed on the ledge portion 113 for the bolt 14 to pass therethrough. The semicircular bracket 12 is configured to have the same structure as the semicircular bracket 11. Thus, the semicircular brackets 11 and 12 are connected to each other at one end by a hinge 13 and at the other end by a bolt 14, thereby forming the modular jig 1. The two semicircular brackets 11 and 12 of the modular fixture 1 can be fastened to the outer wall of the drill collar 170 by adjusting the bolts 14.
According to the present invention, the semicircular brackets 11 and 12 may be made of teflon material, polyetheretherketone material or other high molecular engineering plastics. In this embodiment, the semicircular brackets 11 and 12 are preferably made of teflon. In one embodiment, the modular fixture 1 is configured to have an inner diameter of 120 to 205 mm, a thickness of 50 to 70 mm, and a height of 80 to 120 mm. Therefore, the detection device 100 of the ultrasonic transducer for diameter measurement while drilling can adapt to various drill collars with different specifications which are commonly used on site, is convenient to use, and greatly improves the working efficiency.
Fig. 3 shows the structure of the reflecting element 2 in the detecting device shown in fig. 2. As shown in fig. 3, the reflective element 2 has a cylindrical structure and includes a first connection body 21 and a second connection body 22 integrally connected to each other. In the installed state, the first connection body 21 is radially on the inside, i.e. on the side facing the drill collar 170, and the second connection body 22 is radially on the outside, i.e. on the side facing away from the drill collar 170. Preferably, the first connecting body 21 and the second connecting body 22 are bonded to each other by an adhesive. Meanwhile, according to the present invention, an ultrasonic couplant layer 3 is provided on an end surface of the first connecting body 21 facing the diameter measurement while drilling ultrasonic transducer 180. Preferably, the ultrasonic couplant is a high-molecular gel material. The ultrasonic couplant layer 3 can eliminate air in the gap when the reflecting element 2 is closely attached to the MWD ultrasonic transducer 180. Thus, the reflecting element 2 realizes solid-solid interface ultrasonic energy coupling through the ultrasonic couplant layer 3, which facilitates more ultrasonic pulse signals emitted by the diameter measurement while drilling ultrasonic transducer 180 to propagate in the reflecting element 2 and be reflected and received. Therefore, the working accuracy of the ultrasonic transducer 180 for diameter measurement while drilling is remarkably improved.
In accordance with the present invention, each reflective element 2 is mounted within a respective one of the radial through holes 15 in the modular fixture 1 and is radially aligned with a respective one of the MWD ultrasonic transducers 180 embedded in the drill collar 170. In the illustrated embodiment, three reflection elements 2 are arranged corresponding to the three radial measurement while drilling ultrasonic transducers 180, and are in one-to-one correspondence with the three radial measurement while drilling ultrasonic transducers 180.
A nut 221 is provided at one end of the second connecting body 22 of the reflecting element 2 on the radially outer side, and a male screw 222 is provided in a region close to the nut 221. Meanwhile, an internal thread 151 is provided on an inner surface of the radial through hole 15 of the semicircular bracket near the outer side for cooperating with an external thread 222 of the second connection body 22 of the reflection element 2. Therefore, the radial position of the reflecting element 2 in the combined clamp 1 can be adjusted at will by adjusting the screwing number between the internal thread 151 and the external thread 222, so that air in a gap when the reflecting element 2 is closely attached to the MWD ultrasonic transducer 180 can be eliminated.
In one embodiment, the outer diameters of the first connection body 21 and the second connection body 22 of the reflective element 2 are set to 25 to 35 mm, the length of the first connection body 21 is set to 30 to 40 mm, the length of the second connection body 22 is set to 20 to 30 mm, and the thickness of the adhesive layer between the first connection body 21 and the second connection body 22 is set to 4 to 8 μm. The reflecting elements 2 with different specifications can be embedded into the combined type clamps 1 with different specifications, and can be suitable for drill collars with various specifications on construction sites.
In the present embodiment, the first connection body 21 is made of an organic polymer material, and the second connection body 22 is cast of a metal material. Thus, a solid-solid reflecting interface in which the acoustic impedance difference on both sides is discontinuous is formed in the axial direction of the reflecting element 2. When the ultrasonic pulse emitted by the diameter measurement while drilling ultrasonic transducer 180 propagates along the axial direction of the reflection element 2, the first connecting body 21 can prolong the propagation time of the reflected echo signal, and the delayed propagation effect of the ultrasonic signal is achieved. However, the second connecting body 22 can reduce the transmission attenuation of the ultrasonic pulse, and plays a role in enhancing the amplitude of the reflected echo signal. Therefore, according to the reflection element 2 of the present invention embedded in the jig 1, not only the delay of the arrival time of the reflected echo signal but also the enhancement of the waveform amplitude of the reflected echo signal are achieved. Therefore, the interference of the voltage initial pulse of the MWD ultrasonic transducer 180 on the reflected echo signal is avoided, and the signal-to-noise ratio of the reflected echo signal is improved.
Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing examples, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The detection device comprises a combined clamp which is arranged on the outer wall of the drill collar and consists of two semicircular supports, and a reflecting element which is embedded in the combined clamp and is aligned with the diameter measurement while drilling ultrasonic transducer in the radial direction, wherein an ultrasonic coupling agent layer is arranged on the end face of the reflecting element, facing the diameter measurement while drilling ultrasonic transducer, the reflecting element is tightly attached to the diameter measurement while drilling ultrasonic transducer through the ultrasonic coupling agent layer so that the reflecting element realizes solid-solid interface ultrasonic energy coupling, the reflecting element is of a cylindrical structure and comprises a first connecting body and a second connecting body, the first connecting body is arranged on the radial inner side, the second connecting body is arranged on the radial outer side, and the first connecting body is made of an organic high polymer material, the second connecting body is made of a metal material, so that a solid-solid reflecting interface with two discontinuous acoustic impedance differences is formed in the axial direction of the reflecting element.
2. The detection device according to claim 1, wherein: the semicircular bracket is provided with a radial through hole penetrating through the wall of the bracket, and the reflecting element is arranged in the radial through hole.
3. The detection device according to claim 1, wherein: the first connecting body and the second connecting body are bonded into a whole through an adhesive.
4. The detection device according to claim 3, wherein: and a nut is arranged at one end of the second connecting body which is positioned at the radial outer side, and an external thread is arranged at the area close to the nut.
5. The detection device according to claim 4, wherein: and the inner surface of the radial through hole of the semicircular bracket, which is close to the outer side, is provided with an internal thread which is used for being matched with the external thread of the second connector of the reflecting element.
6. The detection apparatus according to any one of claims 1 to 5, wherein: the semicircular bracket comprises convex edge parts positioned at two ends, and hinge holes and through holes are respectively processed on the convex edge parts.
7. The detection device according to claim 6, wherein: the semicircular bracket is connected by a hinge installed in a hinge hole of the ledge part and a bolt passing through the through hole to form the modular jig.
8. The detection apparatus according to any one of claims 1 to 5, wherein: the semicircular bracket of the combined clamp is made of polytetrafluoroethylene materials.
CN201710684122.0A 2017-08-11 2017-08-11 Detection device for diameter measurement while drilling ultrasonic transducer Active CN109386274B (en)

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CN110160473B (en) * 2019-05-10 2021-04-13 天津大学 Device based on supersound measurement gas-liquid two-phase flow circumference liquid film thickness

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