A vertical rotary test bench for logging while drilling instruments

Abstract

The present invention discloses a vertical rotary test bench for logging while drilling instruments, which solves the technical problem that magnetic materials such as servo motors generate magnetic interference on sensitive instruments. The test bench includes a support frame, which plays a supporting and bearing role; a support sleeve, which is cylindrical and vertically arranged on the support frame; a rotating shaft, which is coaxially rotatably connected in the support sleeve; a joint part, which is coaxially arranged at the bottom of the rotating shaft and is used for coaxial connection with the logging instrument; a shielding box, which is arranged at the top of the support sleeve; a connecting shaft, which is coaxially connected to the rotating shaft at the bottom and extends to the shielding box at the top; a motor drive mechanism, which is arranged in the shielding box and is used to control the rotation of the connecting shaft. The present invention can reduce the degree of magnetic interference of magnetic materials such as servo motors on sensitive instruments, thereby improving the test accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of logging instrument testing, and in particular relates to a vertical logging-while-drilling instrument rotation test bench. Background Art

[0002] The logging while drilling instrument is an instrument that monitors and measures downhole geological parameters in real time during the drilling process. It has the characteristics of real-time, reliability, high precision and multi-function. It can provide accurate geological information and help drilling engineers better understand the formation parameters.

[0003] The rotation test equipment is a high-precision experimental instrument, which is widely used in geophysical exploration, geological survey and marine navigation. Its original design intention is to meet the needs of rotation testing of logging instruments under high-precision conditions.

[0004] With the development of geophysical exploration technology, the requirements for measurement accuracy are getting higher and higher. In many high-precision measurement tasks, such as gravity field measurement, magnetic field measurement and calibration of precision inertial navigation systems, any tiny magnetic interference may cause measurement errors. During the operation of traditional rotating test equipment, the presence of magnetic materials such as servo motors may interfere with sensitive instruments (such as magnetometers, gyroscopes, etc.), thereby affecting the test accuracy, which needs to be improved. Summary of the invention

[0005] In order to solve all or part of the above problems, the purpose of the present invention is to provide a vertical logging while drilling instrument rotation test bench, which can reduce the magnetic interference of magnetic materials such as servo motors on sensitive instruments, thereby improving the test accuracy.

[0006] The present invention provides a vertical logging while drilling instrument rotation test bench, comprising: The support frame plays a supporting and bearing role; The support sleeve is cylindrical and vertically arranged on the support frame; A rotating shaft, coaxially rotatably connected to the support sleeve; A joint part, coaxially arranged at the bottom of the rotating shaft and used for coaxially connecting with the logging instrument; A shielding box is arranged on the top of the supporting sleeve; A connecting shaft, the bottom of which is coaxially connected to the rotating shaft and the top of which extends into the shielding box; The motor drive mechanism is arranged in the shielding box and is used to control the rotation of the connecting shaft.

[0007] Optionally, the connecting shaft includes a wear-resistant ring, a coupling and a transmission shaft. A support hole is provided through the bottom of the shielding box, the wear-resistant ring is fixedly embedded in the support hole, the transmission shaft is coaxially connected to the top of the rotating shaft, the coupling is coaxially connected to the top of the transmission shaft, the coupling passes through the wear-resistant ring and is rotatably connected to the wear-resistant ring, and the motor drive mechanism is used to control the rotation of the coupling.

[0008] Optionally, the motor drive mechanism comprises: A servo motor is fixed in the shielding box; A driving wheel, fixedly sleeved on the output shaft of the servo motor; The driven wheel is fixedly sleeved on the coupling, and the driven wheel is connected with the driving wheel through a synchronous belt.

[0009] Optionally, a shielding layer is provided on the outer surface of the shielding box.

[0010] Optionally, the rotating shaft and the supporting sleeve are rotatably connected via a pair of deep groove ball bearings.

[0011] Optionally, the joint portion comprises: A joint sleeve, detachably connected to the bottom of the rotating shaft; The connector is coaxially arranged at the bottom of the connector sleeve and is used for connecting with the well logging instrument.

[0012] Optionally, the joint sleeve is connected to the rotating shaft via a joint nut.

[0013] Optionally, a wire threading hole is provided through the center position of the rotating shaft, the wire threading hole extends upward and passes through the connecting shaft, a data line protective cover is provided in the wire threading hole, the data line protective cover extends upward and passes through the top of the shielding box, and a wire entry hole is provided through the center position of the joint part, a slip ring is provided in the wire entry hole for data line connection of logging instruments and testing equipment.

[0014] Optionally, the support frame includes a support frame, a support plate and a plurality of adjustable feet, the support plate is horizontally fixed to the top of the support frame, and the plurality of adjustable feet are respectively arranged at the bottom of the support frame; A clearance hole is provided through the middle of the support plate, the outer diameter of the support sleeve is smaller than the aperture of the clearance hole, and the support sleeve is movably inserted into the clearance hole. An adjustment part is provided on the support plate, and the adjustment part is used to adjust the position of the support sleeve so that the logging instrument can be smoothly docked with the joint part.

[0015] Optionally, the adjustment part includes two groups of hydraulic parts, and the two groups of hydraulic parts are symmetrically arranged on both sides of the shielding box, each group of hydraulic parts includes two hinged seats fixed on the support plate, each hinged seat is hinged with a hydraulic cylinder, the piston end of the hydraulic cylinder is rotatably connected to the shielding box through a limit pin, and the piston ends of the two hydraulic cylinders in each group of hydraulic parts are close to each other, and the tail ends are far away from each other.

[0016] It can be seen from the above technical solution that the vertical logging while drilling instrument rotation test bench provided by the present invention has the following advantages: The servo motor is shielded by the shielding box to reduce the magnetic interference of the servo motor and other magnetic materials on sensitive instruments, thereby improving the test accuracy. At the same time, the joint can be adjusted in the vertical and horizontal directions to achieve the position adjustment of the logging instrument, which is convenient for the smooth docking of the logging instrument and the joint, saving time and labor costs, and improving the timeliness of the operation.

[0017] Other features and advantages of the present invention will be set forth in the description which follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 is a cross-sectional view of an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a motor drive mechanism in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the connecting shaft in an embodiment of the present invention; Figure 5 for Figure 4 A magnified schematic diagram of area A in the middle.

[0020] Description of reference numerals: 1. Support frame; 101. Support frame; 102. Support plate; 103. Adjustable foot; 104. Make way hole; 2. Support sleeve; 3. Rotating shaft; 4. Deep groove ball bearing; 5. Joint; 51. Joint sleeve; 52. Connector; 53. Joint nut; 6. Shielding box; 7. Connecting shaft; 71. Wear ring; 72. Coupling; 73. Transmission shaft; 74. Fastening bolt; 75. Connecting nut; 8. Motor drive mechanism; 81. Servo motor; 82. Driving wheel; 83. Driven wheel; 84. Synchronous belt; 9. Support hole; 10. Shielding layer; 11. Mounting groove; 12. Step part; 13. Threading hole; 14. Data cable protective cover; 15. Wire entry hole; 16. Slip ring; 17. Adjustment part; 171. Hydraulic parts; 172. Articulated seat; 173. Hydraulic cylinder; 174. Limit pin; 18. Lifting ring. DETAILED DESCRIPTION

[0021] To make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other arbitrarily without conflict.

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The embodiment of the present invention is shown in the figure, which discloses a vertical logging while drilling instrument rotation test bench, including a support frame 1, a cylindrical support sleeve 2 is vertically arranged on the support frame 1, a rotating shaft 3 is coaxially arranged in the support sleeve 2, and the rotating shaft 3 is rotatably connected with the support sleeve 2 through a pair of deep groove ball bearings 4. The bottom of the rotating shaft 3 extends downward to the bottom of the support sleeve 2, and a joint part 5 is coaxially arranged at the bottom of the rotating shaft 3, and the joint part 5 is used to be coaxially connected with the logging instrument.

[0023] In one embodiment, Figure 1 , Figure 2 As shown, the top of the support sleeve 2 is fixedly connected with a shielding box 6, the top of the rotating shaft 3 is coaxially provided with a connecting shaft 7, and the top of the connecting shaft 7 extends into the shielding box 6. The shielding box 6 is provided with a motor drive mechanism 8, and the motor drive mechanism 8 is used to control the rotation of the connecting shaft 7.

[0024] The vertical LWD instrument rotary test bench in this embodiment shields the servo motor 81 through the shielding box 6 to reduce the magnetic interference of magnetic materials such as the motor on sensitive instruments, thereby improving the test accuracy and ensuring that the test data is accurate and reliable.

[0025] In one embodiment, Figure 2 , Figure 3 , Figure 4As shown, the connecting shaft 7 includes a wear ring 71, a coupling 72 and a transmission shaft 73. A support hole 9 is provided through the bottom of the shielding box 6. The wear ring 71 is fixedly embedded in the support hole 9. The coupling 72 passes through the wear ring 71 and is rotatably connected with the wear ring 71. The motor drive mechanism 8 is used to control the rotation of the coupling 72. The transmission shaft 73 is coaxially arranged between the coupling 72 and the rotating shaft 3. The top of the transmission shaft 73 is fixedly connected to the coupling 72 by a plurality of fastening bolts 74, and the bottom is fixedly connected to the rotating shaft 3 by a connecting nut 75.

[0026] In one embodiment, Figure 2 , Figure 3 As shown, the motor drive mechanism 8 includes a servo motor 81 fixed in the shielding box 6, a driving wheel 82 is fixedly sleeved on the output shaft of the servo motor 81, a driven wheel 83 is fixedly sleeved on the top of the coupling 72, and the driven wheel 83 is connected to the driving wheel 82 through a synchronous belt 84.

[0027] In one embodiment, Figure 2 , Figure 3 As shown, a shielding layer 10 is provided on the outer surface of the shielding box 6. In this embodiment, the shielding layer 10 is provided on the top side and four side surfaces of the shielding box 6, and the shielding layer 10 is made of Permalloy material to improve the electromagnetic shielding effect.

[0028] In one embodiment, Figure 4 , Figure 5 As shown, the joint part 5 includes a joint sleeve 51 and a connector 52. The connector 52 is coaxially arranged at the bottom of the joint sleeve 51 and is integrally connected with the joint sleeve 51. The connector 52 is used to be coaxially connected to the well logging instrument. A mounting groove 11 is arranged at the top of the joint sleeve, and a step portion 12 is provided at the bottom of the rotating shaft 3. The step portion 12 is tightly inserted into the mounting groove 11. The joint sleeve 51 is connected to the rotating shaft 3 through a joint nut 53, so that the joint part 5 can be replaced to adapt to different types of well logging instruments.

[0029] In one embodiment, Figure 2 , Figure 3 , Figure 4 As shown, a wire threading hole 13 is provided at the center position of the rotating shaft 3 in the vertical direction, and the wire threading hole 13 extends upward and passes through the transmission shaft 73 and the coupling 72. At the same time, a data line protection cover 14 is provided in the wire threading hole 13, and the data line protection cover 14 extends upward and passes through the top of the shielding box 6. The data line of the test equipment can pass through the data line protection cover 14, thereby realizing the protection of the data line.

[0030] In one embodiment, Figure 4 , Figure 5As shown, a wire entry hole 15 is provided in the center of the connector 52 in the vertical direction. The wire entry hole 15 extends upward and passes through the connector sleeve 51, and the wire entry hole 15 is aligned with the threading hole 13 for the data line of the logging instrument to pass through. At the same time, a slip ring 16 is provided in the wire entry hole 15, and the data line of the test equipment can be connected to the top of the slip ring 16, and the data line of the logging instrument can be connected to the bottom of the slip ring 16, so as to avoid the problem of twisting and damage of the data line of the logging instrument during rotation.

[0031] In one embodiment, Figure 1 , Figure 2 As shown, the support frame 1 includes a support frame 101, a support plate 102 and a plurality of adjustable feet 103. The support plate 102 is horizontally fixed to the top of the support frame 101, and the plurality of adjustable feet 103 are respectively arranged at the bottom of the support frame 101 to adjust the height of the support frame 101 and other components. The four corners of the upper surface of the support plate 102 are respectively fixedly connected with lifting rings 18 for lifting equipment to lift the test bench.

[0032] In one embodiment, Figure 1 , Figure 2 As shown, a clearance hole 104 is provided through the middle of the support plate 102, the outer diameter of the support sleeve 2 is smaller than the aperture of the clearance hole 104, and the support sleeve 2 is movably inserted into the clearance hole 104, and an adjustment part 17 is provided on the support plate 102, and the adjustment part 17 is used to adjust the position of the support sleeve 2 so that the logging instrument can be smoothly docked with the joint part 5.

[0033] In one embodiment, Figure 1 , Figure 2 As shown, the adjustment part 17 includes two groups of hydraulic parts 171, and the two groups of hydraulic parts 171 are symmetrically arranged on both sides of the shielding box 6, each group of hydraulic parts 171 includes two hinged seats 172 fixed on the support plate 102, and each hinged seat 172 is hinged with a hydraulic cylinder 173, and the piston end of the hydraulic cylinder 173 is rotatably connected to the shielding box 6 through a limit pin 174, and the piston ends of the two hydraulic cylinders 173 in each group of hydraulic parts 171 are close to each other, and the tail ends are far away from each other.

[0034] A lifting device is used to ensure that the logging instrument and the test bench are aligned in one direction, and the test bench is placed at the wellhead. When the piston ends of all hydraulic cylinders 173 are extended synchronously, the shielding box 6 drives the rotating shaft 3 and other components to move upward synchronously. When the piston ends of all hydraulic cylinders 173 are shortened synchronously, the shielding box 6 drives the rotating shaft 3 and other components to move downward synchronously, thereby realizing the vertical adjustment of the logging instrument. When the piston ends of two hydraulic cylinders 173 on different sides are extended synchronously, the shielding box 6 can drive the rotating shaft 3 and other components to move in the horizontal direction, which greatly facilitates the docking process of the logging instrument and the test bench.

[0035] In this embodiment, each component is made of non-magnetic material as much as possible. For example, the support frame 101 is made of aluminum profiles, the coupling 72, the transmission shaft 73, the limit pin 174, the lifting ring 18 and the adjustable foot 103 are made of titanium alloy materials, the support plate 102, the hinge seat 172 and the hydraulic cylinder 173 are made of aluminum alloy materials, the data line protection cover and the slip ring 16 are made of hard plastic materials, and the wear-resistant ring 71 and the support sleeve 2 are made of bronze materials.

[0036] As can be seen from the above, the shielding box 6 shields the servo motor 81, reducing the degree of magnetic interference of the servo motor 81 and other magnetic materials on sensitive instruments, thereby improving the test accuracy. At the same time, the joint 5 can be adjusted in the vertical and horizontal directions, thereby realizing the position adjustment of the logging instrument, facilitating the smooth docking of the logging instrument and the joint 5, saving time and labor costs, and improving the timeliness of the operation.

[0037] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present invention should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0038] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A vertical logging while drilling instrument rotation test bench, characterized in that: include: The support frame (1) plays a supporting and bearing role; The support sleeve (2) is cylindrical and vertically arranged on the support frame (1); A rotating shaft (3) is coaxially rotatably connected to the support sleeve (2); A joint part (5) is coaxially arranged at the bottom of the rotating shaft (3) and is used for coaxially connecting with a well logging instrument; A shielding box (6) is arranged on the top of the supporting sleeve (2); A connecting shaft (7), the bottom of which is coaxially connected to the rotating shaft (3) and the top of which extends into the shielding box (6); A motor drive mechanism (8) is arranged in the shielding box (6) and is used to control the rotation of the connecting shaft (7).

2. The vertical logging while drilling instrument rotation test bench according to claim 1 is characterized in that: The connecting shaft (7) includes a wear-resistant ring (71), a coupling (72) and a transmission shaft (73); a support hole (9) is provided through the bottom of the shielding box (6); the wear-resistant ring (71) is fixedly embedded in the support hole (9); the transmission shaft (73) is coaxially connected to the top of the rotating shaft (3); the coupling (72) is coaxially connected to the top of the transmission shaft (73); the coupling (72) passes through the wear-resistant ring (71) and is rotationally connected to the wear-resistant ring (71); and the motor drive mechanism (8) is used to control the rotation of the coupling (72).

3. The vertical logging while drilling instrument rotation test bench according to claim 2 is characterized in that: The motor drive mechanism (8) comprises: A servo motor (81) is fixed in the shielding box (6); A driving wheel (82) is fixedly sleeved on the output shaft of the servo motor (81); The driven wheel (83) is fixedly sleeved on the coupling (72), and the driven wheel (83) is connected to the driving wheel (82) via a synchronous belt (84).

4. The vertical logging while drilling instrument rotation test bench according to claim 1, characterized in that: The outer surface of the shielding box (6) is provided with a shielding layer (10).

5. The vertical logging while drilling instrument rotation test bench according to claim 1, characterized in that: The rotating shaft (3) and the supporting sleeve (2) are rotatably connected via a pair of deep groove ball bearings (4).

6. The vertical logging while drilling instrument rotation test bench according to claim 1, characterized in that: The joint part (5) comprises: A joint sleeve (51) detachably connected to the bottom of the rotating shaft (3); The connector (52) is coaxially arranged at the bottom of the connector sleeve (51) and is used for connecting to a well logging instrument.

7. The vertical logging while drilling instrument rotation test bench according to claim 6 is characterized in that: The joint sleeve (51) is connected to the rotating shaft (3) via a joint nut (53).

8. The vertical logging while drilling instrument rotation test bench according to claim 1, characterized in that: A threading hole (13) is provided at the center of the rotating shaft (3), the threading hole (13) extends upward and passes through the connecting shaft (7), a data line protection sleeve (14) is provided in the threading hole (13), the data line protection sleeve (14) extends upward and passes through the top of the shielding box (6), and a wire entry hole (15) is provided at the center of the joint part (5), a slip ring (16) is provided in the wire entry hole (15) for data line connection of logging instruments and test equipment.

9. The vertical logging while drilling instrument rotation test bench according to claim 1, characterized in that: The support frame (1) comprises a support frame (101), a support plate (102) and a plurality of adjustable feet (103); the support plate (102) is horizontally fixed to the top of the support frame (101); and the plurality of adjustable feet (103) are respectively arranged at the bottom of the support frame (101); A clearance hole (104) is provided through the middle of the support plate (102); the outer diameter of the support sleeve (2) is smaller than the aperture of the clearance hole (104); and the support sleeve (2) is movably inserted into the clearance hole (104); an adjustment portion (17) is provided on the support plate (102); and the adjustment portion (17) is used to adjust the position of the support sleeve (2) so that the well logging instrument can be smoothly docked with the joint portion (5).

10. The vertical logging while drilling instrument rotation test bench according to claim 9, characterized in that: The adjusting part (17) comprises two groups of hydraulic parts (171), and the two groups of hydraulic parts (171) are symmetrically arranged on both sides of the shielding box (6), each group of hydraulic parts (171) comprises two hinged seats (172) fixed on the support plate (102), each hinged seat (172) is hinged with a hydraulic cylinder (173), the piston end of the hydraulic cylinder (173) is rotatably connected to the shielding box (6) through a limit pin (174), and the piston ends of the two hydraulic cylinders (173) in each group of hydraulic parts (171) are close to each other and the tail ends are far away from each other.

Images