Dislocated well fracture form detection device based on ultrasonic imaging technology

Abstract

A fractured well fracture form detection device based on an ultrasonic imaging technology relates to the field of oil and gas exploitation and comprises two sets of centralizing devices, a first gear motor and a rotating head, an ultrasonic probe is arranged in the rotating head, and the two sets of centralizing devices are symmetrically arranged in mounting grooves in two sides of a mounting body; each set of centralizing device comprises an upper set of double connecting rods, a lower set of double connecting rods, a middle sliding rod and a threaded sliding rod, the middle sliding rod and the threaded sliding rod are installed in the installation groove in a sliding mode, the two sets of double connecting rods are connected to the upper end and the lower end of the middle sliding rod respectively, and a threaded rod is connected to the lower end of the threaded sliding rod and driven by a second gear motor. According to the utility model, each set of centralizing device is provided with an upper supporting point and a lower supporting point, and the upper supporting point and the lower supporting point are used for supporting the centralizing device, so that the centering property of the centralizing device in an underground sleeve is effectively improved, and the ultrasonic imaging quality is further improved.

Description

Technical Field

[0001] The utility model relates to the field of oil and gas exploitation, in particular to a fault well fracture morphology detection device based on ultrasonic imaging technology, which is suitable for online monitoring and maintenance of metal pipelines in industries such as petroleum, chemical industry, and metallurgy. Background Art

[0002] The use of fractured wells is becoming increasingly common in oil and gas production, particularly for improving oil and gas recovery and enhancing oil and gas mobility. The fracture morphology of fractured wells significantly impacts oil and gas flow and production efficiency, necessitating fracture morphology testing in production practices. Currently, the most advanced fracture detection method utilizes ultrasonic imaging technology, which scans the fracture surface to generate an image, thereby visually capturing its morphological characteristics.

[0003] The quality of ultrasonic imaging is related to the incident angle of the beam on the well wall. When the downhole detection instrument is eccentric relative to the well axis or the wellbore ellipticity is large, the beam reflected by the well wall deviates from the center of the transducer, and the received echo is very weak, which will seriously affect the imaging quality. Utility Model Content

[0004] The utility model provides a device for detecting the fracture morphology of a faulted well based on ultrasonic imaging technology, and aims to improve the quality of ultrasonic imaging by improving the existing ultrasonic imaging device for the fracture of a downhole casing.

[0005] The technical problem solved by the present invention is achieved by the following technical solution: The present invention provides a device for detecting the fracture morphology of a faulted well based on ultrasonic imaging technology, comprising a straightening device, a first reduction motor and a rotating head. An ultrasonic probe is provided in the rotating head. The ultrasonic probe rotates under the drive of the reduction motor, thereby performing 360-degree detection of the fracture of the casing;

[0006] There are two sets of righting devices, which are symmetrically arranged in the mounting grooves on both sides of the mounting body;

[0007] Each set of righting devices includes two sets of upper and lower double links, an intermediate slide bar and a threaded slide bar. The intermediate slide bar and the threaded slide bar are slidably installed in the installation groove. The two sets of double links are respectively connected to the upper and lower ends of the intermediate slide bar. Among them, the upper double link is also hinged to the upper end of the installation groove, and the lower double link is also hinged to the upper end of the threaded slide bar.

[0008] The lower end of the threaded sliding rod is connected to a screw rod, and the screw rod is driven by a second reduction motor.

[0009] As a preferred solution, the straightening device is located at the upper part of the fault morphology detection device for faulted wells based on ultrasonic imaging technology, and the rotating head is located at the lower end thereof.

[0010] As a preferred solution, a radial slideway is provided in the rotating head, and the ultrasonic probe is installed in the radial slideway;

[0011] A circular hole is provided on the top of the ultrasonic probe;

[0012] An eccentric wheel is installed on the output shaft of the second reduction motor, and the eccentric wheel is inserted into the circular hole on the top of the ultrasonic probe;

[0013] A slider is fixedly provided on the outer side of the eccentric wheel, and a slideway corresponding to the slider is provided on the inner side of the circular hole. After the eccentric wheel rotates, the slider starts to slide from one end of the slideway, slides 180 degrees along the slideway, and reaches the other end of the slideway, thereby extending the ultrasonic probe under the action of the eccentric wheel.

[0014] The beneficial effects of the utility model are:

[0015] 1. In the present invention, each set of the centralizing device is provided with two upper and lower support points, which support the present invention at two points, effectively improving the centering of the present invention in the downhole casing, thereby improving the quality of ultrasonic imaging.

[0016] 2. In the present invention, in the righting device, the upper and lower support points are linked, which further ensures the centering.

[0017] 3. In practice, in order to smoothly go down the well, the outer diameter of the detection device is much smaller than the inner diameter of the casing, which makes the distance between the ultrasonic probe on the detection device and the inner wall of the casing too large. When there is liquid in the well, the excessive thickness of the liquid between the ultrasonic probe and the inner wall of the casing will cause the ultrasonic wave to be severely attenuated, thereby seriously affecting the imaging quality.

[0018] In the present invention, before the second reduction motor drives the rotary head to rotate, the ultrasonic probe is first extended from the side of the present invention, thereby reducing the distance between the ultrasonic probe and the inner wall of the sleeve and improving the imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the matching structure of the ultrasonic probe and the eccentric wheel.

[0021] In the figure: 1. Mounting body; 2. Double connecting rod; 3. Middle slide rod; 4. Threaded slide rod; 5. Screw; 6. Second reduction motor; 7. Rotating head; 8. Ultrasonic probe; 9. Eccentric wheel; 10. Cable; 11. Slideway; 12. Slider. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] like Figure 1 、 2 As shown, this embodiment includes a straightening device, a first reduction motor, and a rotating head 7. An ultrasonic probe 8 is disposed within the rotating head 7. The first reduction motor and the ultrasonic probe 8 are powered by a cable 10. Driven by the reduction motor, the ultrasonic probe 8 rotates, thereby performing 360-degree detection of the casing fracture. The above is an existing technology in the prior art and will not be repeated here.

[0024] like Figure 1 、 2 As shown, in this embodiment, there are two sets of straightening devices, so as to ensure that the utility model can be located in the center of the casing after installation. The two sets of straightening devices are symmetrically arranged in the installation grooves on both sides of the installation body 1.

[0025] like Figure 1 、 2 As shown, each set of righting devices includes two upper and lower sets of double links 2, an intermediate slide bar 3, and a threaded slide bar 4. The intermediate slide bar 3 and the threaded slide bar 4 are slidably mounted in the mounting slots. The two sets of double links 2 are respectively connected to the upper and lower ends of the intermediate slide bar 3. The upper double link 2 is also hinged to the upper end of the mounting slot, and the lower double link 2 is also hinged to the upper end of the threaded slide bar 4. After connection, the two sets of double links 2, the intermediate slide bar 3, and the threaded slide bar 4 are connected at the ends to form a six-link structure.

[0026] like Figure 1 、 2 As shown, in this embodiment, the lower end of the threaded slide rod 4 is connected to a screw rod 5, which is driven by a second reduction motor 6. After the screw rod 5 rotates, the threaded slide rod 4 slides up and down, thereby extending or retracting the upper and lower sets of double connecting rods 2 into the installation groove.

[0027] like Figure 1 、 2 As shown, in this embodiment, the straightening device is located above the ultrasonic imaging-based fault morphology detection device for a faulted well, with the rotating head 7 located below it. During use, the straightening device is supported above the fault, with the upper casing section serving as a reference, which helps ensure the centering of the present invention.

[0028] In practice, in order to smoothly go down the well, the outer diameter of the detection device is much smaller than the inner diameter of the casing, which makes the distance between the ultrasonic probe 8 on the detection device and the inner wall of the casing too large. In the case of liquid in the well, the excessive thickness of the liquid between the ultrasonic probe 8 and the inner wall of the casing will cause the ultrasonic wave to be severely attenuated, thereby seriously affecting the imaging quality. In the present utility model, Figure 1 、 2As shown, a radial slide 11 is provided inside the rotating head 7, and the ultrasonic probe 8 is installed in the radial slide 11; a circular hole is provided on the top of the ultrasonic probe 8; an eccentric wheel 9 is installed on the output shaft of the second reduction motor 6, and the eccentric wheel 9 is inserted into the circular hole on the top of the ultrasonic probe 8; a slider 12 is fixedly provided on the outside of the eccentric wheel 9, and a slide 11 corresponding to the slider 12 is provided on the inside of the circular hole. After the eccentric wheel 9 rotates, the slider 12 starts to slide from one end of the slide 11, slides along the slide 11 for 180 degrees, and reaches the other end of the slide 11, thereby extending the ultrasonic probe 8 under the action of the eccentric wheel 9. Before the second reduction motor 6 drives the rotating head 7 to rotate, it will first extend the ultrasonic probe 8 from the side of the present invention, thereby reducing the distance between the ultrasonic probe 8 and the inner wall of the cannula and improving the imaging quality.

Claims

1. A device for detecting the fracture morphology of a faulted well based on ultrasonic imaging technology, comprising a straightening device, a first reduction motor and a rotating head (7), wherein an ultrasonic probe (8) is arranged in the rotating head (7), and the ultrasonic probe (8) rotates under the drive of the reduction motor, thereby performing 360-degree detection of the fracture of the casing, characterized in that: There are two sets of righting devices, which are symmetrically arranged in the mounting grooves on both sides of the mounting body (1); Each set of straightening devices comprises two upper and lower groups of double connecting rods (2), an intermediate sliding rod (3) and a threaded sliding rod (4), wherein the intermediate sliding rod (3) and the threaded sliding rod (4) are slidably mounted in the mounting groove, and the two groups of double connecting rods (2) are respectively connected to the upper and lower ends of the intermediate sliding rod (3), wherein the upper double connecting rod (2) is also hinged to the upper end of the mounting groove, and the lower double connecting rod (2) is also hinged to the upper end of the threaded sliding rod (4); The lower end of the threaded slide rod (4) is connected to a screw rod (5), and the screw rod (5) is driven by a second reduction motor (6).

2. The device for detecting the fracture morphology of a faulted well based on ultrasonic imaging technology according to claim 1, characterized in that: The straightening device is located at the upper part of the fault morphology detection device for a faulted well based on ultrasonic imaging technology, and the rotating head (7) is located at the lower end thereof.

3. The device for detecting the fracture morphology of a faulted well based on ultrasonic imaging technology according to claim 1 is characterized in that: A radial slideway (11) is provided in the rotating head (7), and the ultrasonic probe (8) is installed in the radial slideway (11); A circular hole is provided on the top of the ultrasonic probe (8); An eccentric wheel (9) is mounted on the output shaft of the second reduction motor (6), and the eccentric wheel (9) is inserted into the circular hole at the top of the ultrasonic probe (8); A slider (12) is fixedly provided on the outer side of the eccentric wheel (9), and a slideway (11) corresponding to the slider (12) is provided on the inner side of the circular hole. After the eccentric wheel (9) rotates, the slider (12) starts to slide from one end of the slideway (11), slides along the slideway (11) for 180 degrees, and reaches the other end of the slideway (11), thereby extending the ultrasonic probe (8) under the action of the eccentric wheel (9).

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