CN111965731A

CN111965731A - Testing device and testing equipment

Info

Publication number: CN111965731A
Application number: CN202010817862.9A
Authority: CN
Inventors: 郭尚静; 彭凯旋; 李辉; 张利伟; 李苏; 赵龙
Original assignee: China Oilfield Services Ltd; China National Offshore Oil Corp CNOOC
Current assignee: China Oilfield Services Ltd; China National Offshore Oil Corp CNOOC
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2020-11-20
Anticipated expiration: 2040-08-14
Also published as: CN111965731B

Abstract

The embodiment of the invention discloses a testing device and testing equipment, wherein the testing device comprises a cylinder body and an inner cavity arranged in the cylinder body, and two ends of the cylinder body are respectively provided with a through hole communicated with the inner cavity; the cylinder body is arranged to be capable of being installed at the position of an acoustic window of the well peripheral acoustic imaging instrument, and the through hole is arranged to be capable of being penetrated by an acoustic system short circuit of the well peripheral acoustic imaging instrument.

Description

Testing device and testing equipment

Technical Field

The embodiment of the invention relates to but is not limited to offshore operation equipment, and particularly relates to a testing device and testing equipment.

Background

The borehole acoustic imaging tool is used for ultrasonically scanning the wall of a borehole or cased hole to generate detailed images. The probe of the instrument emits high frequency acoustic pulses and measures the time of arrival and amplitude of borehole wall echoes. The amplitude of the echo is influenced by the structure of the well wall, and the arrival time reflects the distance from the probe to the well wall. The ultrasonic probe is mounted on the rotating part of the instrument, so that the wall of the well can be scanned by 360 degrees around the well, and two groups of images are generated: amplitude and time.

At present, the performance test method of the acoustic imaging instrument is carried out in a calibration well, and the test environment of the calibration well does not exist when the field operation is carried out on the sea (land), so a field engineer can only judge the performance of the instrument through communication, the drilling speed of a motor and a reflected waveform. This method of judging the working performance of the instrument in the field causes two problems: firstly, when the instrument is debugged, the acoustic window is in an air-exposed state, an effective reflection interface is not available, an accurate reflection waveform cannot be obtained, and the reflection time and the reflection sound amplitude are difficult to be provided, so that the working reliability of the ultrasonic probe is difficult to judge; secondly, acoustic imaging is scanning imaging of the whole borehole circumference of the borehole wall at 360 degrees, and the reliability of the imaging of the instrument cannot be judged in the field instrument performance testing method because the instrument is exposed in air and is difficult to simulate the underground logging environment.

Disclosure of Invention

The embodiment of the invention also provides a testing device and testing equipment, wherein the testing device comprises a cylinder body and an inner cavity arranged in the cylinder body, and two ends of the cylinder body are respectively provided with a through hole communicated with the inner cavity; the cylinder body is arranged to be capable of being installed at the position of an acoustic window of the well peripheral acoustic imaging instrument, and the through hole is arranged to be capable of being penetrated by an acoustic system short circuit of the well peripheral acoustic imaging instrument.

The embodiment of the invention also provides a test device which comprises the well periphery sound imaging instrument and a test device arranged at the position of the sound window of the well periphery sound imaging instrument.

Compared with the prior art, the testing device can simulate the formation well wall to test the well circumferential acoustic imaging instrument, is simple in structure, convenient to install, portable and rapid, can provide acoustic imaging instrument performance testing conditions for a well logging operation site, improves the success rate of one-time well logging of acoustic imaging well logging operation, and is convenient to research and develop the acoustic imaging instrument, convenient to maintain and debug, good in flexibility, high in universality, accurate in measuring result, small in workload and low in labor cost in the later period.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.

FIG. 1 is a perspective view of a testing device provided in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a cavity recess of a testing device according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a sealing member of a testing apparatus according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a sealing ring of a testing apparatus according to an embodiment of the present invention;

fig. 5 is a schematic view of a testing apparatus installed in a peri-well acoustic imaging instrument according to an embodiment of the present invention.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments of the present invention may be arbitrarily combined with each other without conflict.

As shown in fig. 1 to 5, an embodiment of the present invention provides a testing device 100, which includes a barrel 1, and an inner cavity 10 disposed in the barrel 1. Two ends of the cylinder body 1 are respectively provided with a through hole 11 and a through hole 12 which are communicated with the inner cavity 10. The cylinder 1 is arranged to be mountable at the acoustic window position of the borehole acoustic imaging apparatus 200. The

perforations

11, 12 are arranged to be penetrated by an acoustic short 2 of the borehole acoustic imaging apparatus 200. The cylinder 1 of the embodiment of the invention is made of aluminum alloy.

The embodiment of the invention can simulate the formation well wall to test the well circumferential acoustic imaging instrument 200 by using the testing device 100, has simple structure, convenient installation, portability and rapidness, can provide the performance testing condition of the acoustic imaging instrument for the logging operation field, improves the success rate of one-time well entry of the acoustic imaging logging operation, and has convenient research and development, maintenance and debugging operation, good flexibility, high universality, accurate measurement result, small workload and low labor cost of the acoustic imaging instrument at the later stage.

As shown in fig. 1, the cylinder 1 includes a first cylinder 13 and a second cylinder 14 which are axially spliced with each other in the cylinder 1, and the first cylinder 13 and the second cylinder 14 are connected to each other by a fixing member 15. The fastening member 15 in the embodiment of the present invention may be a fastening bolt, and as shown in the figure, there are four sets of fastening bolts, upper and lower. The joint of the first cylinder 13 and the second cylinder 14 is sealed by a sealing element 16, and the structure of the sealing element 16 is as shown in fig. 3, and includes an upper part and a lower part, which are respectively sealed at the joint of the upper part and the joint of the lower part. The seal 16in embodiments of the present invention may be rubber. In an exemplary embodiment, the first barrel 13 and the second barrel 14 are assembled by splicing two symmetrical half-cylinders.

In the embodiment of the invention, the cylinder 1 is designed into the first cylinder 13 and the second cylinder 14, so that the testing device 100 can be more conveniently installed at the position of the acoustic window of the well periphery acoustic imaging instrument 200.

During installation, the first cylinder 13 and the second cylinder 14 can be just fixed on an acoustic window of an acoustic imaging instrument, the first cylinder 13 and the second cylinder 14 are fastened at the acoustic window of the instrument by using a screw thread structure, a layer of rubber is fixed on a contact surface to seal and isolate water, the positions of the through

holes

11 and 12 are sealed by using a sealing ring 19, and the structure of the sealing ring 19 is shown in fig. 4.

In one exemplary embodiment, the diameter of the lumen is in the range of 5.5in-16in, the axial length of the barrel 1 is in the range of 120 mm-200 mm, the wall thickness of the barrel 1 is in the range of 8mm-15mm, and the diameter of the

perforations

11, 12 at both ends of the barrel 1 is in the range of 5mm-15 mm.

In an exemplary embodiment, the inside diameter of the cylinder 1 is 8.5in (to simulate a hole diameter of 8.5 in), the axial length of the cylinder 1 is 180mm, the wall thickness of the cylinder 1 is 10mm, and the

perforations

11, 12 at both ends of the cylinder 1 are 92mm in diameter (corresponding to 92mm outside diameter of the acoustic imaging instrument sonde).

As shown in fig. 1, a liquid injection groove 17 communicated with the inner cavity 10 is formed on the side surface of the cylinder 1. Liquid may be injected into the cavity 10 via a fluid injection slot 17 to simulate formation well fluid. The liquid injection groove 17 is formed at the joint of the first cylinder 13 and the second cylinder 14. The diameter of the liquid injection groove 17 is about 10mm, and the specific diameter can be set according to actual conditions. The test apparatus 100 is further provided with a rubber stopper corresponding to the liquid injection tank 17, and sealed after injection (not shown).

As shown in fig. 2, the inner cavity 10 of the cylinder 1 has a plurality of grooves 18, which may be slits, holes, etc. with certain width and angle. The invention simulates formation cracks and holes on the well wall by arranging a plurality of grooves 18 on the wall of the inner cavity 10, thereby testing the detection precision of the well peripheral acoustic imaging instrument 200.

In one exemplary embodiment, as shown in FIG. 2, the plurality of grooves 18 extend in an axial direction, and the plurality of grooves 18 are arranged in a circumferential direction. The plurality of grooves 13 have various widths, and the adjacent grooves have various pitches. The width of each groove 13 is chosen within the range of 1mm-10 mm. The spacing between adjacent grooves 18 is selected within the range of 10mm to 40 mm.

In an exemplary embodiment, the walls of the inner cavity 10 of the first barrel 13 and the second barrel 14 are each provided with a plurality of grooves 18. The cavity walls of the inner cavities 10 of the first cylinder 13 and the second cylinder 14 are respectively provided with grooves 18 with the depth of 5mm, the length of 150mm, the width of 1mm, 2mm, 4mm, 6mm, 8mm and 10mm and the interval of 20mm, 25mm, 30mm, 35mm and 40mm so as to simulate the formation well wall crack,

the testing device 100 provided by the embodiment of the invention is convenient and simple to assemble and disassemble, visual in testing, easy to operate, high in testing accuracy and low in cost, and can be used for simulating crack structure imaging on the inner wall of the testing barrel and judging the reliability of the working performance of an instrument.

As shown in fig. 1-5, the testing device 100 is installed in the imaging apparatus 200 for testing, and the fastening bolt is first loosened to enlarge the apertures of the through

holes

11 and 12, so that the testing device can be conveniently sleeved in the acoustic window of the imaging apparatus. The test device 100 is then inserted into the borehole acoustic imaging apparatus 200, and the recess 18 of the test device 100 is typically positioned in the acoustic window of the apparatus. The upper and lower sets of fastening bolts are slowly tightened to firmly and hermetically lock the casing of the borehole acoustic imaging apparatus 200. The test bucket is filled with water through the liquid injection groove 17, and the liquid injection groove 17 is closed to observe the tightness of the device. And powering the well periphery sound imaging instrument 200 to perform performance test. Carrying out actual logging simulation by using an internal driving mode, and observing an emission waveform and an acoustic imaging graph; and comparing the consistency of the test bucket inner groove imaging result and the test bucket device design drawing in the imaging drawing, and judging the performance and the imaging effect of the instrument.

The testing device 100 can be conveniently installed at a proper position of the well periphery sound imaging instrument 200, the well periphery sound imaging instrument 200 does not need to be carried or moved for testing, the cost is saved, and the safety is high.

In the description of the embodiments of the present invention, the term "plurality" means two or more. In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "periphery", "mouth" word structure ", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the structures referred to have specific orientations, are configured and operated in specific orientations, and thus, are not to be construed as limiting the present invention.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected," "directly connected," "indirectly connected," "fixedly connected," "mounted," and "assembled" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; the terms "mounted," "connected," and "fixedly connected" may be directly connected or indirectly connected through intervening media, or may be connected through two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A test apparatus, comprising: the device comprises a barrel and an inner cavity arranged in the barrel, wherein two ends of the barrel are respectively provided with a through hole communicated with the inner cavity; the cylinder body is arranged to be capable of being installed at the position of an acoustic window of the well peripheral acoustic imaging instrument, and the through hole is arranged to be capable of being penetrated by an acoustic system short circuit of the well peripheral acoustic imaging instrument.

2. The test device of claim 1, wherein: the barrel includes along first barrel and the second barrel of barrel axial concatenation each other, first barrel and second barrel adopt mounting interconnect.

3. The test device of claim 2, wherein: the mutual splicing position of the first cylinder and the second cylinder is sealed by a sealing element.

4. The test device of claim 2, wherein: and a liquid injection groove communicated with the inner cavity is formed in the side surface of the cylinder body.

5. The test device of claim 4, wherein: the liquid injection groove is formed in the joint of the first cylinder and the second cylinder.

6. The test device of claim 1, wherein: the wall of the inner cavity of the cylinder body is provided with a plurality of grooves extending along the axial direction, and the grooves are arranged along the circumferential direction.

7. The test device of claim 6, wherein: the width of the grooves is various, and the distance between the adjacent grooves is various.

8. The test device of claim 7, wherein: the width of each groove is selected within 1mm-10mm, and the distance between every two adjacent grooves is selected within 10mm-40 mm.

9. The test device of claim 1, wherein: the diameter range of the inner cavity is 5.5-16 in, the axial length range of the cylinder body is 120-200mm, the wall thickness range of the cylinder body is 8-15 mm, and the diameters of the through holes at the two ends of the cylinder body are 5-15 mm.

10. A test apparatus comprising a peri-well acoustic imaging tool and a test device according to any one of claims 1 to 9 mounted at the location of an acoustic window of the peri-well acoustic imaging tool.