A calibration device for logging while drilling tool

Abstract

The present invention discloses a calibration device for a logging while drilling instrument, which solves the technical problems of troublesome calibration operation and low operation efficiency of the logging instrument. The device includes a support frame and a receiving frame, and also includes: a magnesium block calibration mechanism, which is arranged on the support frame; an aluminum block calibration mechanism, which is arranged on the support frame; a neutron bucket calibration mechanism, which is arranged on the receiving frame; a guide slide rail, one end of which is fixedly connected to the support frame and the other end is fixedly connected to the receiving frame; a conveyor vehicle, which is horizontally slidably matched with the guide slide rail; the logging instrument can be placed horizontally on the conveyor vehicle, and the conveyor vehicle is used to drive the logging instrument to move horizontally, and one end of the logging instrument enters the magnesium block calibration mechanism and the aluminum block calibration mechanism successively, or the other end of the logging instrument enters the neutron bucket calibration mechanism. The present invention enables the logging instrument to perform calibration operations in a horizontal state, which can improve the convenience of operation, improve the operation efficiency, and reduce the operation cost.

Description

Technical Field

[0001] The invention belongs to the technical field of logging instrument measuring devices, and in particular relates to a scale calibration device for a logging while drilling instrument. Background Art

[0002] As the field operation time of the radioactive logging instrument while drilling increases, the mechanical structure wear and circuit aging, the use of radioactive sources and other problems will affect the measurement accuracy and precision of the logging instrument. In order to ensure the accuracy and precision of the logging instrument, it is necessary to recalculate the measurement coefficient of the instrument through calibration regularly to eliminate the measurement errors caused by differences in radioactive sources or changes in the instrument circuit and mechanical structure.

[0003] At present, radioactive logging while drilling is developing towards integration and integration. The integrated neutron density logging while drilling integrates the measurement functions of neutron porosity, lithology density, well diameter, etc. into one instrument. The overall length of the instrument is about 5.5m, which can realize the measurement of multiple parameters downhole.

[0004] When calibrating the well logging instrument in the related technology, it is usually necessary to use a lifting device to lift the well logging instrument and make the well logging instrument vertical. Then, the well logging instrument is placed in the magnesium block calibration mechanism, the aluminum block calibration mechanism and the neutron bucket calibration mechanism in turn to achieve the calibration of the well logging instrument.

[0005] However, the above calibration method requires the use of lifting equipment and the collaboration of multiple people, which is very troublesome to operate, not only affecting the timeliness of the operation, but also increasing the cost of the operation. At the same time, when the logging instrument is lifted by the lifting equipment, the roof height of the laboratory must meet the requirements. Therefore, it is necessary to build an additional corresponding laboratory, which increases the cost. In addition, when the logging instrument is lifted by the lifting equipment and the logging instrument is calibrated, there are certain safety hazards, which need to be improved. Summary of the invention

[0006] In order to solve all or part of the above problems, the purpose of the present invention is to provide a calibration device for a while drilling logging instrument, so that the logging instrument can be calibrated in a horizontal state, which can not only improve the operational convenience, but also improve the operation time efficiency, reduce the operation cost, and improve the operational safety and reduce safety hazards.

[0007] The present invention provides a calibration device for a logging while drilling tool, comprising a support frame and a receiving frame, and further comprising:

[0008] A magnesium block calibration mechanism is arranged on the support frame;

[0009] An aluminum block scale calibration mechanism is arranged on the support frame;

[0010] A neutron water bucket calibration mechanism is arranged on the receiving frame;

[0011] A guide rail is arranged horizontally, one end of the guide rail is fixedly connected to the support frame, and the other end of the guide rail is fixedly connected to the receiving frame;

[0012] A conveying vehicle, horizontally slidingly matched with the guide rail;

[0013] The logging instrument can be placed horizontally on the transport vehicle, which is used to drive the logging instrument to move horizontally, and make one end of the logging instrument enter the magnesium block calibration mechanism and the aluminum block calibration mechanism successively, or make the other end of the logging instrument enter the neutron bucket calibration mechanism.

[0014] Optionally, the magnesium block calibration mechanism comprises:

[0015] A magnesium scale block is arranged on the support frame;

[0016] A first calibration hole is provided through the magnesium scale block, the first calibration hole is provided in a horizontal direction, and a logging instrument can enter the first calibration hole;

[0017] a first mounting hole, disposed on a side wall of the magnesium scale block and connected to the first calibration hole;

[0018] A first shielding plug cover, detachably connected to the magnesium scale block and used to cover the first mounting hole;

[0019] When the logging instrument enters the first calibration hole, the installation position of the radioactive source of the logging instrument can be aligned with the first installation hole, so that the radioactive source of the logging instrument can pass through the first installation hole and be installed at the corresponding position of the logging instrument.

[0020] Optionally, the magnesium block calibration mechanism further includes:

[0021] A first pushing and leaning frame, movably arranged on the supporting frame;

[0022] There are two first supporting surfaces, which are respectively arranged on the first pushing and leaning frames, and the bottoms of the two first supporting surfaces are close to each other, so that the two first supporting surfaces are in a V shape;

[0023] First guide rollers, which are arranged in two rows and are respectively disposed on the corresponding first supporting surfaces, and the logging instrument can abut against the first guide rollers and can slide horizontally along the two rows of the first guide rollers;

[0024] The first hydraulic mechanism is arranged on the support frame and is used to control the vertical movement of the first pushing frame so that the logging instrument is in close contact with the inner wall of the first calibration hole.

[0025] Optionally, the aluminum block calibration mechanism includes:

[0026] An aluminum scale block is arranged on the support frame;

[0027] A second calibration hole is provided through the aluminum scale block, the second calibration hole is provided in a horizontal direction, and a logging instrument can enter the second calibration hole;

[0028] A second mounting hole is provided on the side wall of the aluminum scale block and is connected to the second calibration hole;

[0029] A second shielding plug cover is detachably connected to the aluminum scale block and is used to cover the second mounting hole;

[0030] When the logging instrument enters the second calibration hole, the installation position of the radioactive source of the logging instrument can be aligned with the second installation hole, so that the radioactive source of the logging instrument can pass through the second installation hole and be installed at the corresponding position of the logging instrument.

[0031] Optionally, the aluminum block calibration mechanism further includes:

[0032] A second pushing and leaning frame, movably arranged on the supporting frame;

[0033] There are two second supporting surfaces, which are respectively arranged on the second pushing and leaning frames, and the bottoms of the two second supporting surfaces are close to each other, so that the two second supporting surfaces are V-shaped;

[0034] The second guide rollers are arranged in two rows and are respectively arranged on the corresponding second supporting surfaces. The logging instrument can abut against the second guide rollers and can slide horizontally along the two rows of the second guide rollers.

[0035] The second hydraulic mechanism is arranged on the support frame and is used to control the vertical movement of the second pushing frame so that the logging instrument is in close contact with the inner wall of the second calibration hole.

[0036] Optionally, the neutron bucket calibration mechanism includes:

[0037] A neutron scale water bucket is horizontally arranged on the receiving frame;

[0038] A third calibration hole is provided through the neutron calibration bucket, the third calibration hole is provided in a horizontal direction, and a logging instrument can enter the third calibration hole;

[0039] A water storage annular cavity is arranged inside the neutron calibration water bucket, and the water storage annular cavity is arranged along the circumference of the third calibration hole. A filling pipe connected with the water storage annular cavity is arranged at the upper end of the neutron calibration water bucket.

[0040] Optionally, the neutron bucket calibration mechanism further includes:

[0041] A third pushing and leaning frame, movably arranged on the receiving frame;

[0042] There are two third support surfaces, which are respectively arranged on the third pushing and leaning frames, and the bottoms of the two third support surfaces are close to each other, so that the two third support surfaces are V-shaped;

[0043] The third guide rollers are arranged in two rows and are respectively arranged on the corresponding third support surfaces. The logging instrument can abut against the third guide rollers and can slide horizontally along the two rows of the third guide rollers.

[0044] The third hydraulic mechanism is arranged on the receiving frame and is used to control the vertical movement of the third pushing frame so that the logging instrument is in close contact with the inner wall of the third calibration hole.

[0045] Optionally, the transport vehicle comprises:

[0046] Auxiliary support vehicles, two in number, and respectively slidably cooperate with the guide rails horizontally;

[0047] A main support vehicle is disposed between the two auxiliary support vehicles and horizontally slides with the guide rail;

[0048] A chain type locker is arranged on the main support vehicle and is used to fix the logging instrument.

[0049] Optionally, each of the auxiliary support vehicles is movably provided with a fourth push-and-lean frame, each of the fourth push-and-lean frames is provided with a pair of fourth support surfaces, the bottoms of each pair of the fourth support surfaces are close to each other, and each pair of the fourth support surfaces is V-shaped;

[0050] A row of fourth guide rollers is respectively arranged on each of the fourth supporting surfaces, and the logging instrument can abut against the corresponding two rows of the fourth guide rollers and can slide horizontally along the corresponding two rows of the fourth guide rollers. A fourth hydraulic mechanism is respectively arranged on each of the auxiliary supporting vehicles, and the fourth hydraulic mechanism is used to control the vertical movement of the corresponding fourth pushing and supporting frame to realize the lifting and lowering control of the logging instrument.

[0051] Optionally, a plurality of shock-absorbing and leveling supports are respectively provided at the bottom of the support frame, the receiving frame and the guide rail.

[0052] It can be seen from the above technical solution that the calibration device for a logging while drilling tool provided by the present invention has the following advantages:

[0053] The calibration device enables the logging instrument to be calibrated in a horizontal state, which can not only improve the operational convenience, but also improve the operation efficiency and reduce the operation cost. Compared with the prior art of hoisting the logging instrument, the calibration device can improve the operational safety and thus reduce safety hazards.

[0054] Other features and advantages of the present invention will be set forth in the description which follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] 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.

[0056] Figure 1 It is a schematic diagram of the overall structure of a calibration device for a logging while drilling tool in an embodiment of the present invention;

[0057] Figure 2 It is a front view of a scale calibration device for a logging while drilling tool in an embodiment of the present invention;

[0058] Figure 3 It is a structural schematic diagram of a scale calibration device for a logging while drilling tool in an embodiment of the present invention;

[0059] Figure 4 for Figure 3 A magnified schematic diagram of the middle A area;

[0060] Figure 5 for Figure 3 A magnified schematic diagram of the middle B area;

[0061] Figure 6 for Figure 3 Enlarged schematic diagram of the middle C area;

[0062] Figure 7 for Figure 3 A magnified schematic diagram of region D in the middle.

[0063] Description of reference numerals:

[0064] 1. Support frame; 2. Undertaking frame; 3. Guide rail; 4. Magnesium block scale calibration mechanism; 41. Magnesium scale block; 42. First calibration hole; 43. First push-to-receive frame; 44. First hydraulic mechanism; 45. First support surface; 46. First guide roller; 47. First mounting hole; 48. First shielding cover; 5. Aluminum block scale calibration mechanism; 51. Aluminum scale block; 52. Second calibration hole; 53. Second push-to-receive frame; 54. Second hydraulic mechanism; 55. Second support surface; 56. Second guide roller; 57. Second mounting hole Mounting hole; 58, second shielding plug cover; 6, neutron water bucket calibration mechanism; 61, neutron calibration water bucket; 62, third calibration hole; 63, water storage ring cavity; 64, filling pipe; 65, third push and support frame; 66, third hydraulic mechanism; 67, third support surface; 68, third guide roller; 7, conveyor vehicle; 71, main support vehicle; 72, auxiliary support vehicle; 73, chain locker; 74, fourth push and support frame; 75, fourth hydraulic mechanism; 76, fourth support surface; 77, fourth guide roller; 8, shock-absorbing and leveling support. DETAILED DESCRIPTION

[0065] 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.

[0066] like Figure 1-Figure 7 FIG. 1 is an embodiment of the present invention, which discloses a calibration device for a logging while drilling instrument, including a support frame 1 and a receiving frame 2. A guide rail 3 is arranged between the support frame 1 and the receiving frame 2. The guide rail 3 is arranged horizontally. At the same time, the left end of the guide rail 3 is fixedly connected to the support frame 1, and the right end is fixedly connected to the receiving frame 2 (the orientation "left" and "right" refer to Figure 2 The support frame 1 is provided with a magnesium block calibration mechanism 4 and an aluminum block calibration mechanism 5, the aluminum block calibration mechanism 5 is located on the left side of the magnesium block calibration mechanism 4, and the receiving frame 2 is provided with a neutron water bucket calibration mechanism 6.

[0067] In one embodiment, Figure 1 , Figure 2 , Figure 3 As shown, the calibration device for the logging while drilling instrument further includes a conveyor 7, which is horizontally slidably matched with the guide rail 3, so that the conveyor 7 can move toward the magnesium block calibration mechanism 4, or toward the neutron bucket calibration mechanism 6. The logging instrument can be horizontally placed on the conveyor 7, so that the conveyor 7 is used to drive the logging instrument to move horizontally, and the left end of the logging instrument successively enters the magnesium block calibration mechanism 4 and the aluminum block calibration mechanism 5, or the right end of the logging instrument enters the neutron bucket calibration mechanism 6.

[0068] When the logging instrument needs to be calibrated, place the logging instrument horizontally on the transport vehicle 7, then push the support vehicle to drive the logging instrument to move to the left, and when the left end of the logging instrument enters the magnesium block calibration mechanism 4, the logging instrument can be calibrated with a magnesium block. Then, continue to push the support vehicle to drive the logging instrument to move to the left, and when the left end of the logging instrument enters the aluminum block calibration mechanism 5, the logging instrument can be calibrated with an aluminum block. Next, push the support vehicle to drive the logging instrument to move to the right, and when the right end of the logging instrument enters the neutron bucket calibration mechanism 6, the logging instrument can be calibrated with a neutron bucket.

[0069] The calibration device for the logging while drilling instrument in this embodiment enables the logging instrument to be calibrated in a horizontal state without the need to lift the logging instrument through a lifting device, which can improve the convenience of operation, improve the timeliness of operation, and reduce the operation cost. At the same time, compared with the prior art of lifting the logging instrument, there is no need to build an additional corresponding laboratory, which reduces the operation cost and saves floor space. At the same time, this design can also improve the safety of operation, thereby reducing safety hazards.

[0070] In one embodiment, Figure 1 , Figure 2 , Figure 3 As shown, the magnesium block calibration mechanism 4 includes a magnesium scale block 41, which is fixed to the support frame 1 by a plurality of fastening bolts. A first calibration hole 42 is provided through the magnesium scale block 41. The first calibration hole 42 is provided in a horizontal direction, and the logging instrument can enter the first calibration hole 42.

[0071] In one embodiment, Figure 3 , Figure 4 As shown, the magnesium block scale calibration mechanism 4 also includes a first push frame 43, which is located on the left side of the magnesium scale and is movably arranged on the support frame 1. The support frame 1 is provided with a first hydraulic mechanism 44, which is used to control the first push frame 43 to move in the vertical direction.

[0072] In one embodiment, Figure 3 , Figure 4 As shown, two first supporting surfaces 45 are provided on the first pushing frame 43, and the bottoms of the two first supporting surfaces 45 are close to each other, so that the two first supporting surfaces 45 are V-shaped. At the same time, a row of first guide rollers 46 is provided on each first supporting surface 45, and each row of first guide rollers 46 is arranged along the axial direction of the first calibration hole 42. The logging instrument can abut against the two rows of first guide rollers 46 respectively, and can slide horizontally along the two rows of first guide rollers 46.

[0073] When the logging instrument enters the first calibration hole 42, the first hydraulic mechanism 44 controls the first push frame 43 and other components to move upward, so that the logging instrument is closely abutted against the inner wall of the first calibration hole 42. At this time, the logging instrument can perform the magnesium block calibration operation. This design enables the logging instrument to be closely abutted against the magnesium scale block 41 to improve the measurement accuracy. At the same time, the first guide roller 46 can achieve stable support for the logging instrument and also play a good guiding role for the logging instrument, so that the logging instrument can slide smoothly in the horizontal direction.

[0074] In one embodiment, Figure 1 , Figure 2 As shown, a first mounting hole 47 is provided on the side wall of the magnesium scale block 41 , and the first mounting hole 47 is connected to the first calibration hole 42 . At the same time, a first shielding cover 48 is detachably connected to the magnesium scale block 41 , and the first shielding cover 48 is used to cover the first mounting hole 47 .

[0075] When the logging instrument enters the first calibration hole 42, and the installation position of the radioactive source of the logging instrument is aligned with the first installation hole 47, the staff can pass the radioactive source of the logging instrument through the first installation hole 47 and install the radioactive source at the corresponding position of the logging instrument, and then install the first shielding cover so that the first shielding cover shields the gamma rays emitted by the radioactive source. This design allows the radioactive source of the logging instrument to be installed after the logging instrument enters the first installation hole 47, that is, the radioactive source of the logging instrument is installed later, so as to avoid the staff from being affected by the radiation of gamma rays for a long time, thereby ensuring the personal safety of the staff.

[0076] In one embodiment, Figure 1 , Figure 2 , Figure 3 As shown, the aluminum block calibration mechanism 5 includes an aluminum scale block 51, which is connected to the support frame 1 by a plurality of fastening bolts. A second calibration hole 52 is provided through the aluminum scale block 51, and the second calibration hole 52 is coaxial with the first calibration hole 42 so that the logging instrument can enter the second calibration hole 52.

[0077] In one embodiment, Figure 3 , Figure 5 As shown, the aluminum block scale calibration mechanism 5 also includes a second push frame 53, which is located on the left side of the aluminum scale block 51 and is movably connected to the support frame 1. The support frame 1 is provided with a second hydraulic mechanism 54, which is used to control the second push frame 53 to move in the vertical direction.

[0078] In one embodiment, Figure 3 , Figure 5As shown, two second supporting surfaces 55 are provided on the second pushing frame 53, and the bottoms of the two second supporting surfaces 55 are close to each other, so that the two second supporting surfaces 55 are V-shaped. A row of second guide rollers 56 is provided on each second supporting surface 55, and each row of second guide rollers 56 is arranged along the axial direction of the second calibration hole 52. The logging instrument can abut against the two rows of second guide rollers 56 respectively, and can slide horizontally along the two rows of second guide rollers 56.

[0079] When the left end of the logging instrument enters the second calibration hole 52, the second hydraulic mechanism 54 controls the second push frame 53 and other components to move upward, so that the logging instrument is closely abutted against the inner wall of the second calibration hole 52. At this time, the logging instrument can perform aluminum block calibration. This design enables the logging instrument to be closely abutted against the aluminum scale block 51 to improve measurement accuracy. At the same time, the second guide roller 56 can achieve stable support for the logging instrument and also play a good guiding role for the logging instrument, so that the logging instrument can slide smoothly in the horizontal direction.

[0080] In one embodiment, Figure 1 , Figure 2 , Figure 3 As shown, a second mounting hole 57 is provided on the side wall of the aluminum scale block 51 , and the second mounting hole 57 is connected to the second calibration hole 52 . A second shielding cover 58 is detachably connected to the aluminum scale block 51 , and the second shielding cover 58 is used to cover the second mounting hole 57 .

[0081] When the left end of the logging instrument enters the second calibration hole 52, and the installation position of the radioactive source of the logging instrument is aligned with the second installation hole 57, the staff can pass the radioactive source of the logging instrument through the second installation hole 57 and install the radioactive source at the corresponding position of the logging instrument, and then install the second shielding cover so that the second shielding cover can shield the gamma rays emitted by the radioactive source. In addition, after the logging instrument completes the aluminum block calibration operation, the radioactive source of the logging instrument can be disassembled first to avoid the staff from being affected by the radiation of gamma rays for a long time, thereby ensuring the personal safety of the staff.

[0082] In this embodiment, the first mounting hole 47 and the second mounting hole 57 have the same size, the first shielding cover 48 and the second shielding cover 58 have exactly the same material, size and structure, and the first shielding cover 48 and the second shielding cover 58 are respectively connected to the corresponding scale blocks by fastening screws.

[0083] In one embodiment, Figure 1 , Figure 2 , Figure 3As shown, the neutron water bucket calibration mechanism 6 includes a neutron calibration water bucket 61, which is horizontally arranged on the receiving frame 2. A third calibration hole 62 is provided through the neutron calibration water bucket 61, which is arranged in the horizontal direction, and the logging instrument can enter the third calibration hole 62. A water storage annular cavity 63 is provided inside the neutron calibration water bucket 61, and the water storage annular cavity 63 is arranged along the circumference of the third calibration hole 62, and a filling pipe 64 connected to the water storage annular cavity 63 is provided at the upper end of the neutron calibration water bucket 61.

[0084] In one embodiment, Figure 3 , Figure 6 As shown, the neutron water bucket calibration mechanism 6 also includes a third push frame 65, which is located on the right side of the neutron calibration water bucket 61 and is movably connected to the receiving frame 2. The receiving frame 2 is provided with a third hydraulic mechanism 66, and the third hydraulic mechanism 66 is used to control the third push frame 65 to move in the vertical direction.

[0085] In one embodiment, Figure 3 , Figure 6 As shown, two third supporting surfaces 67 are provided on the third pushing frame 65, and the bottoms of the two third supporting surfaces 67 are close to each other, so that the two third supporting surfaces 67 are V-shaped. A row of third guide rollers 68 are respectively provided on each third supporting surface 67, and each row of third guide rollers 68 are respectively arranged along the axial direction of the third calibration hole 62. The logging instrument can abut against the two rows of third guide rollers 68 respectively, and can slide horizontally along the two rows of third guide rollers 68.

[0086] When the right end of the logging instrument enters the third calibration hole 62, the third hydraulic mechanism 66 controls the third push frame 65 and other components to move upward, so that the logging instrument is closely abutted against the inner wall of the third calibration hole 62. At this time, the logging instrument can perform neutron bucket calibration. This design enables the logging instrument to be closely abutted against the inner side of the neutron bucket to improve the measurement accuracy. At the same time, the third guide roller 68 can achieve stable support for the logging instrument and also play a good guiding role for the logging instrument, so that the logging instrument can slide smoothly in the horizontal direction.

[0087] In one embodiment, Figure 1 , Figure 2 , Figure 3 As shown, the transport vehicle 7 includes a main support vehicle 71 and two auxiliary support vehicles 72. The main support vehicle 71 is located between the two auxiliary support vehicles 72, and the main support vehicle 71 and the two auxiliary support vehicles 72 are respectively slidably matched with the guide rail 3. The main support vehicle 71 is used to support the middle position of the logging instrument, and the auxiliary support vehicle 72 is used to support the two sides of the logging instrument. At the same time, a chain locker 73 is provided on the main support vehicle 71, and the locking chain of the chain locker 73 can hold the logging instrument tightly to fix the logging instrument.

[0088] In one embodiment, Figure 3 , Figure 7 As shown, each auxiliary support vehicle 72 is provided with a fourth push-and-leave frame 74, each auxiliary support vehicle 72 is provided with a fourth hydraulic mechanism 75, and the fourth hydraulic mechanism 75 is used to control the vertical movement of the corresponding fourth push-and-leave frame 74. Each fourth push-and-leave frame 74 is provided with a pair of fourth support surfaces 76, the bottoms of each pair of fourth support surfaces 76 are close to each other, and each pair of fourth support surfaces 76 is V-shaped. At the same time, each fourth support surface 76 is provided with a row of fourth guide rollers 77, each row of fourth guide rollers 77 is arranged along the axial direction of the logging instrument, and the logging instrument can abut against the corresponding two rows of fourth guide rollers 77, and can slide horizontally along the corresponding two rows of fourth guide rollers 77.

[0089] When the middle part of the logging instrument abuts against the main support vehicle 71 and the two sides abut against the corresponding fourth guide rollers 77, the logging instrument can be transported by the main support vehicle 71 and the auxiliary support vehicle 72. When the logging instrument needs to move in the horizontal direction, the logging instrument can be temporarily fixed by the chain locker 73 to prevent the logging instrument from slipping.

[0090] In this embodiment, when the logging instrument is placed on the main support vehicle 71 and the two auxiliary support vehicles 72, the logging instrument is coaxial with the first calibration hole 42, the second calibration hole 52 and the third calibration hole 62, so that the logging instrument can smoothly enter the corresponding calibration hole during the horizontal sliding process of the logging instrument. At the same time, the structure and initial position of the first guide roller 46, the second guide roller 56, the third guide roller 68 and the fourth guide roller 77 are the same, so as to ensure that when the logging instrument enters the corresponding calibration hole, the logging instrument and the corresponding guide roller form abutment, thereby realizing stable support and position limiting of the logging instrument.

[0091] In one embodiment, Figure 1 , Figure 2 , Figure 3 As shown, a plurality of shock-absorbing and leveling supports 8 are respectively arranged at the bottom of the support frame 1, the receiving frame 2 and the guide rail 3. The shock-absorbing and leveling supports 8 can achieve a good shock-absorbing effect. At the same time, the shock-absorbing and leveling supports 8 are threadedly connected to the support frame 1, the receiving frame 2 or the guide rail 3 so that the height of the shock-absorbing and leveling supports 8 can be adjusted, so that the staff can adjust the horizontality of the scale calibration device.

[0092] As can be seen from the above, the calibration device enables the logging instrument to be calibrated in a horizontal state, which can not only improve the convenience of operation, but also improve the operation time and reduce the operation cost. Compared with the prior art of lifting the logging instrument, the calibration device can improve the operation safety, thereby reducing the potential safety hazards. At the same time, the radioactive source of the logging instrument can be installed later and disassembled in advance, shortening the contact time between the radioactive source and the staff, that is, reducing the time the staff is exposed to radiation, so as to ensure the personal safety of the staff.

[0093] 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.

[0094] 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.

[0095] 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 calibration device for a logging while drilling tool, characterized in that: It comprises a supporting frame (1) and a receiving frame (2), and also comprises: A magnesium block calibration mechanism (4) is arranged on the support frame (1); An aluminum block scale calibration mechanism (5) is arranged on the support frame (1); A neutron water bucket scale calibration mechanism (6) is arranged on the receiving frame (2); The guide rail (3) is arranged horizontally, one end of the guide rail (3) is fixedly connected to the support frame (1), and the other end is fixedly connected to the receiving frame (2); A conveying vehicle (7) is horizontally slidably matched with the guide rail (3); The logging instrument can be placed horizontally on the transport vehicle (7), and the transport vehicle (7) is used to drive the logging instrument to move horizontally, and to make one end of the logging instrument successively enter the magnesium block scale calibration mechanism (4) and the aluminum block scale calibration mechanism (5), or to make the other end of the logging instrument enter the neutron water bucket scale calibration mechanism (6).

2. The calibration device for a logging while drilling tool according to claim 1, characterized in that: The magnesium block calibration mechanism (4) comprises: A magnesium scale block (41) is arranged on the support frame (1); A first calibration hole (42) is provided through the magnesium scale block (41), the first calibration hole (42) is provided in a horizontal direction, and a logging instrument can enter the first calibration hole (42); A first mounting hole (47) is provided on the side wall of the magnesium scale block (41) and is connected to the first calibration hole (42); A first shielding plug cover (48) is detachably connected to the magnesium scale block (41) and is used to cover the first mounting hole (47); When the logging instrument enters the first calibration hole (42), the installation position of the radioactive source of the logging instrument can be aligned with the first installation hole (47), so that the radioactive source of the logging instrument can pass through the first installation hole (47) and be installed at the corresponding position of the logging instrument.

3. The calibration device for a logging while drilling tool according to claim 2, characterized in that: The magnesium block calibration mechanism (4) further comprises: A first pushing and leaning frame (43) movably arranged on the supporting frame (1); Two first supporting surfaces (45) are respectively arranged on the first pushing frame (43), the bottoms of the two first supporting surfaces (45) are close to each other, and the two first supporting surfaces (45) are in a V shape; First guide rollers (46), which are arranged in two rows and are respectively arranged on the corresponding first support surfaces (45); the well logging instrument can abut against the first guide rollers (46) and can slide horizontally along the two rows of the first guide rollers (46); The first hydraulic mechanism (44) is arranged on the support frame (1) and is used to control the vertical movement of the first pushing frame (43) so that the logging instrument is in close contact with the inner wall of the first calibration hole (42).

4. The calibration device for a logging while drilling tool according to claim 1, characterized in that: The aluminum block scale calibration mechanism (5) comprises: An aluminum scale block (51) is arranged on the support frame (1); A second calibration hole (52) is provided through the aluminum scale block (51), the second calibration hole (52) is provided in a horizontal direction, and a logging instrument can enter the second calibration hole (52); A second mounting hole (57) is provided on the side wall of the aluminum scale block (51) and is connected to the second calibration hole (52); A second shielding plug cover (58) is detachably connected to the aluminum scale block (51) and is used to cover the second mounting hole (57); When the logging instrument enters the second calibration hole (52), the installation position of the radioactive source of the logging instrument can be aligned with the second installation hole (57), so that the radioactive source of the logging instrument can pass through the second installation hole (57) and be installed at the corresponding position of the logging instrument.

5. The calibration device for a logging while drilling tool according to claim 4, characterized in that: The aluminum block scale calibration mechanism (5) further comprises: A second pushing and leaning frame (53) is movably arranged on the supporting frame (1); Two second supporting surfaces (55) are respectively arranged on the second pushing and leaning frame (53), the bottoms of the two second supporting surfaces (55) are close to each other, and the two second supporting surfaces (55) are in a V shape; Second guide rollers (56), which are arranged in two rows and are respectively arranged on the corresponding second support surfaces (55); the well logging instrument can abut against the second guide rollers (56) and can slide horizontally along the two rows of the second guide rollers (56); The second hydraulic mechanism (54) is arranged on the support frame (1) and is used to control the vertical movement of the second pushing frame (53) so that the logging instrument is in close contact with the inner wall of the second calibration hole (52).

6. The calibration device for a logging while drilling tool according to claim 1, characterized in that: The neutron bucket calibration mechanism (6) comprises: A neutron calibration water bucket (61) is horizontally arranged on the receiving frame (2); A third calibration hole (62) is provided through the neutron calibration bucket (61), the third calibration hole (62) is provided in a horizontal direction, and a logging instrument can enter the third calibration hole (62); A water storage annular cavity (63) is arranged inside the neutron calibration water bucket (61), and the water storage annular cavity (63) is arranged along the circumference of the third calibration hole (62). A filling pipe (64) connected to the water storage annular cavity (63) is arranged at the upper end of the neutron calibration water bucket (61).

7. The calibration device for a logging while drilling tool according to claim 6, characterized in that: The neutron bucket calibration mechanism (6) further comprises: A third pushing and leaning frame (65) is movably arranged on the receiving frame (2); There are two third supporting surfaces (67) respectively arranged on the third pushing frame (65), the bottoms of the two third supporting surfaces (67) are close to each other, and the two third supporting surfaces (67) are V-shaped; The third guide rollers (68) are arranged in two rows and are respectively arranged on the corresponding third support surfaces (67). The logging instrument can abut against the third guide rollers (68) and can slide horizontally along the two rows of the third guide rollers (68); The third hydraulic mechanism (66) is arranged on the receiving frame (2) and is used to control the vertical movement of the third pushing frame (65) so that the logging instrument is in close contact with the inner wall of the third calibration hole (62).

8. The calibration device for a logging while drilling tool according to claim 1, characterized in that: The transport vehicle (7) comprises: Auxiliary support vehicles (72), two in number, and respectively in horizontal sliding cooperation with the guide rails (3); A main support vehicle (71) is disposed between the two auxiliary support vehicles (72) and is horizontally slidably matched with the guide rail (3); A chain locker (73) is arranged on the main support vehicle (71) and is used to fix the well logging instrument.

9. The calibration device for a logging while drilling tool according to claim 8, characterized in that: Each of the auxiliary support vehicles (72) is movably provided with a fourth push-and-leave frame (74), and each of the fourth push-and-leave frames (74) is provided with a pair of fourth support surfaces (76), the bottoms of each pair of the fourth support surfaces (76) are close to each other, and each pair of the fourth support surfaces (76) is V-shaped; A row of fourth guide rollers (77) is respectively arranged on each of the fourth supporting surfaces (76), and the logging instrument can abut against the corresponding two rows of the fourth guide rollers (77) and can slide horizontally along the corresponding two rows of the fourth guide rollers (77). A fourth hydraulic mechanism (75) is respectively arranged on each of the auxiliary supporting vehicles (72), and the fourth hydraulic mechanism (75) is used to control the vertical movement of the corresponding fourth pushing and supporting frame (74) to realize the lifting and lowering control of the logging instrument.

10. The calibration device for a logging while drilling tool according to claim 1, characterized in that: A plurality of shock-absorbing and leveling supports (8) are respectively arranged at the bottom of the support frame (1), the receiving frame (2) and the guide slide rail (3).

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