Transfer type multi-arm caliper logging instrument

Abstract

The utility model discloses a transfer type multi-arm caliper logging instrument which comprises a shell, vertical holes are formed in the outer wall of the shell at equal intervals, a vertical pipe is fixedly connected to the interior of the shell, electric push rods are installed on the outer side of the vertical pipe at equal intervals, sliding rails are fixedly connected to the outer wall of the vertical pipe at equal intervals, and the sliding rails correspond to the vertical holes. A moving seat is slidably connected to the outer wall of the sliding rail, the output end of the electric push rod is in clearance fit with the moving seat, a compression spring is arranged in the moving seat, and the two ends of the compression spring abut against the electric push rod and the moving seat respectively. The utility model relates to the technical field of oil well logging, and solves the problems that in the prior art, measuring arms of a multi-arm hole diameter logging instrument need to be unfolded or folded simultaneously, the complexity and failure rate of a mechanical structure are increased due to synchronous operation, the stability is poor, the maintenance cost is correspondingly increased, the measuring arms are prone to abrasion due to long-time friction with a well wall, and the measurement precision is high. And the measurement precision and the service life of the equipment are influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to petroleum well logging technical field, concretely is a kind of multi-arm caliper logging instrument of partial motion. BACKGROUND

[0002] In the process of oil exploitation, due to the implementation of various oil production measures, the pressure imbalance between well and well, layer and layer is caused, which further aggravates the casing damage problems such as fault activity, shale water absorption expansion, chemical corrosion, etc., thereby causing the casing to appear wear, corrosion, damage and other deformation phenomena. At present, the caliper logging instrument technology is one of the effective methods for detecting casing damage. By measuring the inner diameter of the casing and generating the corresponding caliper change curve, using high-precision sensors and advanced signal processing technology, the micro changes of the casing inner diameter can be monitored in real time, and the wear, corrosion, damage and other deformation of the casing can be accurately reflected, so that potential risks can be found in time. In the prior art, the measuring arms of the multi-arm caliper logging instrument need to be expanded or retracted at the same time, and the synchronous operation increases the complexity and failure rate of the mechanical structure, the stability is poor, the maintenance cost is correspondingly increased, and the measuring arms are easily worn due to long-time friction with the well wall, which affects the measurement accuracy and service life of the equipment. SUMMARY

[0003] In view of the deficiencies of the prior art, the utility model provides a multi-arm caliper logging instrument of partial motion, which solves the problems of the prior art that the measuring arms of the multi-arm caliper logging instrument need to be expanded or retracted at the same time, the synchronous operation increases the complexity and failure rate of the mechanical structure, the stability is poor, the maintenance cost is correspondingly increased, and the measuring arms are easily worn due to long-time friction with the well wall, which affects the measurement accuracy and service life of the equipment.

[0004] To achieve the above-mentioned purpose, the utility model realizes through the following technical scheme: a multi-arm caliper logging instrument of partial motion, comprising a shell, a vertical hole is equidistantly formed on the outer wall of the shell, a vertical pipe is fixedly connected inside the shell, an electric push rod is equidistantly installed on the outer side of the vertical pipe, a slide rail is equidistantly fixedly connected to the outer wall of the vertical pipe, the slide rail is correspondingly arranged with the vertical hole, a moving seat is slidably connected to the outer wall of the slide rail, the output end of the electric push rod is gap matched with the moving seat, a compression spring is arranged inside the moving seat, the two ends of the compression spring are abuttingly connected with the electric push rod and the moving seat respectively, a fixed seat is fixedly connected to the outer wall of the vertical pipe below the slide rail, a first supporting arm is rotatably connected to the side of the moving seat and the fixed seat away from the vertical pipe, an abutting wheel is rotatably connected to the end of the two first supporting arms away from the vertical pipe, a displacement sensor is installed on the side of the fixed seat close to the slide rail, and the sensing end of the displacement sensor is connected with the moving seat.

[0005] Preferably, the inside of the shell is provided with a servo motor above and below the standpipe, the output end of the servo motor is drivingly connected with a bidirectional screw rod, the bidirectional screw rod is rotatably connected with the shell, the outer side of the bidirectional screw rod is equidistantly provided with a abutting plate, the outer wall of the abutting plate is rotatably connected with a rotating wheel, the outer wall of the bidirectional screw rod is equidistantly screw-connected with a lifting seat, the two sides of the lifting seat are equidistantly rotatably connected with a second supporting arm, the second supporting arm is rotatably connected with the abutting plate, the inside of the shell is fixedly connected with a sliding rod on the two sides of the bidirectional screw rod, and the sliding rod is slidingly connected with the lifting seat.

[0006] Preferably, the bottom of the shell is provided with an arc-shaped front end, and the inside of the arc-shaped front end is provided with a camera.

[0007] Preferably, the top and bottom of the standpipe are provided with a connecting module.

[0008] Preferably, the top of the shell is provided with a connecting rod.

[0009] The utility model provides a kind of multi-arm well diameter logging instrument of split drive.It has the following beneficial effects: the multi-arm well diameter logging instrument of split drive, through the cooperation between shell, vertical hole, standpipe, electric push rod, sliding rail, moving seat, compression spring, fixed seat, first supporting arm, abutting wheel and displacement sensor, moving seat is lifted and moved by electric push rod, the measuring arm formed by two first supporting arms and abutting wheel can be independently controlled, when abutting wheel moves to recess or protrusion, the position of abutting wheel is adjusted quickly by the elastic force of compression spring, which can ensure stable contact state under different well wall forms, thereby ensuring the measurement accuracy of equipment, and when a measuring arm fails, it will not affect the extension control of other measuring arms, effectively reducing equipment maintenance and maintenance cost, improving the stability and overall service life of well diameter logging instrument, which helps multi-arm well diameter logging instrument better adapt to complex measurement environment in practical application.

[0010] Through the cooperation between shell, servo motor, bidirectional screw rod, abutting plate, rotating wheel, lifting seat, second supporting arm and sliding rod, two groups of supporting structures are respectively arranged at the two ends of well diameter logging instrument, and the two groups of supporting structures are vertically distributed, the angle between second supporting arm on the two sides of lifting seat and abutting plate is changed by moving lifting seat towards each other or away from each other, and then abutting plate is extended or retracted, in the measurement process, the two ends of well diameter logging instrument are supported by contacting each rotating wheel with well wall, so as to ensure the stable operation of well diameter logging instrument in well, and the abrasion of equipment can be reduced by rotating wheel, which helps to improve the stability of well diameter logging instrument moving in well. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a structural schematic view of the utility model;

[0012] Figure 2 It is an appearance schematic view of the utility model;

[0013] Figure 3 It is an appearance schematic view of bidirectional screw rod, lifting seat and second support arm in the utility model;

[0014] Figure 4 It is Figure 1 It is a local enlarged view of A area in the utility model.

[0015] In the figure: 1, shell; 2, vertical hole; 3, vertical pipe; 4, electric push rod; 5, sliding rail; 6, moving seat; 7, compression spring; 8, fixed seat; 9, first support arm; 10, abutting wheel; 11, displacement sensor; 12, servo motor; 13, bidirectional screw rod; 14, abutting plate; 15, runner; 16, lifting seat; 17, second support arm; 18, sliding rod; 19, arc front end; 20, camera; 21, connection module; 22, connecting rod. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0017] In the prior art, the measuring arms of the multi-arm caliper logging instrument need to be expanded or retracted at the same time, and synchronous operation increases the complexity and failure rate of mechanical structure, has poor stability, correspondingly increases maintenance cost, and long-time friction of the measuring arms with the well wall can easily cause abrasion, which affects the measuring precision and service life of the equipment.

[0018] Therefore, the utility model provides a kind of multi-arm well diameter logging instrument of split type, through the cooperation between shell, vertical hole, vertical pipe, electric push rod, slide rail, moving seat, compression spring, fixed seat, first support arm, abutting wheel and displacement sensor, moving seat is lifted and moved by electric push rod, the measuring arm formed by two first support arms and abutting wheel can be independently controlled, when abutting wheel moves to recess or convex, the position of abutting wheel is adjusted quickly by the elastic force of compression spring, ensure that it can keep stable contact state under different well wall form, ensure the measurement accuracy of equipment, and when the failure of certain measuring arm occurs, it will not affect the expansion control of other measuring arms, reduce equipment maintenance and maintenance cost, improve the stability and overall service life of well diameter logging instrument.

[0019] By the person skilled in the art, all electrical components in the case are connected to their appropriate power sources through wires, and appropriate controllers and encoders should be selected according to actual conditions to meet the control requirements. The specific connection and control sequence should be completed according to the working order of each electrical component in the following working principle. The detailed connection method is a well-known technology in the field, and the working principle and process are mainly introduced below, and the electrical control is not described.

[0020] By Figures 1-4 It can be known that a multi-arm well diameter logging instrument of split type includes a shell 1 made of alloy metal material, which is the shell structure of the well diameter logging instrument. The outer wall of the shell 1 is equally provided with vertical holes 2 for the measuring arm to be unfolded and extended from the shell 1 and to be retracted. The inside of the shell 1 is fixedly connected with a vertical pipe 3, and the outer side of the vertical pipe 3 is equally provided with electric push rods 4. The outer wall of the vertical pipe 3 is equally fixedly connected with slide rails 5, which are correspondingly arranged with the vertical holes 2. The outer wall of the slide rails 5 is slidably connected with a moving seat 6. The output end of the electric push rod 4 is in clearance fit with the moving seat 6. The inside of the moving seat 6 is provided with a compression spring 7, which gives the moving seat 6 an elastic force away from the electric push rod 4. The two ends of the compression spring 7 are in abutment with the electric push rod 4 and the moving seat 6, respectively. The outer wall of the vertical pipe 3 is fixedly connected with a fixed seat 8 below the slide rails 5. The moving seat 6 and the fixed seat 8 are rotatably connected with first support arms 9 away from the vertical pipe 3. The two first support arms 9 are rotatably connected with abutting wheels 10 away from the vertical pipe 3. The fixed seat 8 is installed with a displacement sensor 11 close to the slide rails 5. The sensing end of the displacement sensor 11 is in fit connection with the moving seat 6.

[0021] In the implementation process, it is particularly worth pointing out that the shell 1 is made of alloy metal material, which is the shell structure of the caliper logging instrument, the vertical hole 2 is used for the measuring arm to be unfolded and stretched out and retracted from the shell 1, through the cooperation between the vertical pipe 3, the electric push rod 4, the sliding rail 5, the moving seat 6 and the compression spring 7, the telescopic rod of the electric push rod 4 is controlled to realize the lifting movement of the moving seat 6 on the sliding rail 5, the compression spring 7 gives the moving seat 6 the elastic force away from the electric push rod 4, through the cooperation between the shell 1, the vertical hole 2, the vertical pipe 3, the electric push rod 4, the sliding rail 5, the moving seat 6, the compression spring 7, the fixed seat 8, the first supporting arm 9 and the abutting wheel 10, the angle between the two first supporting arms 9 changes correspondingly by lifting the moving seat 6, and then the position of the abutting wheel 10 is adjusted, the abutting wheel 10 is stretched out or retracted by the vertical hole 2, after the abutting wheel 10 is tightly adhered to the well wall, the output end of the electric push rod 4 and the moving seat 6 form a certain compression to the compression spring 7, so that the abutting wheel 10 of the measuring arm can accurately adhere to the well wall, during the movement of the caliper logging instrument, through the rotation of the abutting wheel 10, the abrasion of the well wall to the measuring arm is reduced, when the abutting wheel 10 moves to the recessed or protruding place, the moving seat 6 moves through the elastic force of the compression spring 7, the position of the abutting wheel 10 is automatically adjusted, so that it can maintain a stable contact state under different well wall shapes, through the cooperation between the moving seat 6, the fixed seat 8 and the displacement sensor 11, after the measuring arm is unfolded, the moving seat 6 moves to the bottom on the sliding rail 5, the sensing end of the displacement sensor 11 and the bottom of the moving seat 6 are tightly adhered, during the measurement, when the abutting wheel 10 moves to the recessed or protruding place, the position of the moving seat 6 changes, the displacement sensor 11 can monitor and record the position change data of the moving seat 6 in real time, and the sensing signal is fed back to the control system in real time through the data transmission system, the control system generates the corresponding caliper change curve automatically by using advanced signal processing technology, the small changes of the inner diameter of the oil well casing are monitored in real time, the abrasion, corrosion, damage and other deformation of the casing are accurately reflected, so that the potential risks are found in time, through the cooperation between the shell 1, the vertical hole 2, the vertical pipe 3, the electric push rod 4, the sliding rail 5, the moving seat 6, the compression spring 7, the fixed seat 8, the first supporting arm 9, the abutting wheel 10 and the displacement sensor 11, the moving seat 6 is lifted and moved by the electric push rod 4, so that the measuring arm composed of the two first supporting arms 9 and the abutting wheel 10 can be independently controlled, when it is tightly adhered to the well wall, through the rotation of the abutting wheel 10, the abrasion of the well wall to the measuring arm is reduced, when the abutting wheel 10 moves to the recessed or protruding place, the moving seat 6 is adaptively moved through the elastic force of the compression spring 7, the position of the abutting wheel 10 is quickly adjusted, so that it can maintain a stable contact state under different well wall shapes, the measurement accuracy of the equipment is guaranteed, and when a certain measuring arm fails, it will not affect the telescopic control of other measuring arms, the equipment maintenance and maintenance cost is reduced, the stability and overall service life of the caliper logging instrument are improved,The specific model of the electric push rod 4 and the displacement sensor 11 is not limited, and the use requirement can be met.

[0022] Further, the inside of the shell 1 is provided with a servo motor 12 above and below the stand pipe 3, the output end of the servo motor 12 is drivingly connected with a bidirectional screw rod 13, the bidirectional screw rod 13 is rotatably connected with the shell 1, the outer side of the bidirectional screw rod 13 is equidistantly provided with an abutting plate 14, the outer wall of the abutting plate 14 is rotatably connected with a rotating wheel 15, the outer wall of the bidirectional screw rod 13 is equidistantly screw-connected with a lifting seat 16, the two sides of the lifting seat 16 are equidistantly rotatably connected with a second supporting arm 17, the second supporting arm 17 is rotatably connected with the abutting plate 14, the inside of the shell 1 is fixedly connected with a slide rod 18 on the two sides of the bidirectional screw rod 13, and the slide rod 18 is slidingly connected with the lifting seat 16.

[0023] In the specific implementation process, it is particularly worth pointing out that through the cooperation between the shell 1, the servo motor 12, the bidirectional screw rod 13, the lifting seat 16 and the slide rod 18, the servo motor 12 drives the bidirectional screw rod 13 to rotate, realizes stable lifting adjustment of the lifting seat 16, through the cooperation between the bidirectional screw rod 13, the abutting plate 14, the lifting seat 16, the second supporting arm 17 and the slide rod 18, a single set of supporting structure of the well diameter logging instrument is formed, through the rotation of the bidirectional screw rod 13, the lifting seat 16 moves towards each other or away from each other, the angle between the second supporting arm 17 on the two sides of the lifting seat 16 and the abutting plate 14 is changed, and then the abutting plate 14 is extended or retracted, through the cooperation between the shell 1, the servo motor 12, the bidirectional screw rod 13, the abutting plate 14, the rotating wheel 15, the lifting seat 16, the second supporting arm 17 and the slide rod 18, two sets of supporting structures are arranged at the two ends of the well diameter logging instrument, and the two sets of supporting structures are vertically distributed, the servo motor 12 simultaneously drives the bidirectional screw rods 13 of the two sets of supporting structures to rotate, the lifting seat 16 moves towards each other or away from each other, the angle between the second supporting arm 17 on the two sides of the lifting seat 16 and the abutting plate 14 is changed, and then the abutting plate 14 is extended or retracted, in the measurement process, each rotating wheel 15 is in contact with the well wall, a support is formed at the two ends of the well diameter logging instrument, so that the well diameter logging instrument can stably run in the well, and the abrasion of the equipment is reduced through the rotation of the rotating wheel 15, and the specific model of the servo motor 12 is not limited, and the use requirement can be met.

[0024] Further, the bottom of the shell 1 is provided with an arc-shaped front end 19, and the inside of the arc-shaped front end 19 is provided with a camera 20.

[0025] In the specific implementation process, it is particularly worth pointing out that through the cooperation between the shell 1, the arc-shaped front end 19 and the camera 20, by arranging the camera 20 at the front end of the well diameter logging instrument, the image data collected by the camera 20 during the movement of the logging instrument is transmitted to the ground control center in real time through the data transmission module, the movement path of the downhole is monitored in real time, and the operator can discover and handle potential safety hazards in time, wherein the specific model of the camera 20 is not limited, and the use demand can be met;

[0026] Further, the top and bottom of the vertical pipe 3 are provided with a connecting module 21, and the connecting module 21 is connected between the two ends of the vertical pipe 3 and the support structure in a flange plate connection mode;

[0027] In the specific implementation process, it is particularly worth pointing out that the connecting module 21 is connected between the two ends of the vertical pipe 3 and the support structure in a flange plate connection mode, so that the well diameter logging instrument is modularly designed, the installation and disassembly efficiency of the well diameter logging instrument is improved, and the upgrading, maintenance and replacement of the equipment are facilitated, so that the well diameter logging instrument can be modularly assembled according to different well conditions and measurement requirements;

[0028] Further, the top of the shell 1 is provided with a connecting rod 22, and the connecting rod 22 is used for connecting the well diameter logging instrument and the traction equipment;

[0029] In the specific implementation process, it is particularly worth pointing out that the connecting rod 22 is used for connecting the well diameter logging instrument and the traction equipment, so as to ensure that the well diameter logging instrument can stably and efficiently move in various well conditions.

[0030] It should be noted that in this paper, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitation. The statement "including a limited element" does not exclude the existence of other identical elements in the process, method, article or equipment including the element.

[0031] In the utility model, unless another definite provision and limitation, the term "installation", "arrangement", "connection", "fixation", "screw connection" and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can indirectly connect through intermediate medium, can be two element inside's intercommunication or two element's mutual action relation, unless another definite limitation, for the ordinary skill of the art, can understand the above-mentioned term in the utility model specific meaning according to specific circumstances.

[0032] Although the embodiments of the utility model have been shown and described, it will be appreciated by those of ordinary skill in the art that various changes, modifications, alternatives, and variations can be made thereto without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A split-arm multi-arm caliper logging instrument comprising a housing (1), characterized in that: The outer wall of the shell (1) is equidistantly provided with a vertical hole (2), the inside of the shell (1) is fixedly connected with a vertical pipe (3), the outer side of the vertical pipe (3) is equidistantly provided with an electric push rod (4), the outer wall of the vertical pipe (3) is equidistantly fixedly connected with a sliding rail (5), the sliding rail (5) is correspondingly arranged with the vertical hole (2), the outer wall of the sliding rail (5) is slidably connected with a moving seat (6), the output end of the electric push rod (4) is in clearance fit with the moving seat (6), the inside of the moving seat (6) is provided with a compression spring (7), the two ends of the compression spring (7) are respectively in abutting fit with the electric push rod (4) and the moving seat (6), the outer wall of the vertical pipe (3) is fixedly connected with a fixed seat (8) below the sliding rail (5), the side, away from the vertical pipe (3), of the moving seat (6) and the fixed seat (8) is rotatably connected with a first supporting arm (9), the end, away from the vertical pipe (3), of the two first supporting arms (9) is rotatably connected with an abutting wheel (10), the side, close to the sliding rail (5), of the fixed seat (8) is provided with a displacement sensor (11), the sensing end of the displacement sensor (11) is connected with the moving seat (6).

2. A multi-arm well caliper according to claim 1, wherein: The inside of the shell (1) is provided with a servo motor (12) above and below the vertical pipe (3), the output end of the servo motor (12) is drivingly connected with a bidirectional screw (13), the bidirectional screw (13) is rotatably connected with the shell (1), the outer side of the bidirectional screw (13) is equidistantly provided with an abutting plate (14), the outer wall of the abutting plate (14) is rotatably connected with a rotating wheel (15), the outer wall of the bidirectional screw (13) is equidistantly screw-connected with a lifting seat (16), the two sides of the lifting seat (16) are equidistantly rotatably connected with a second supporting arm (17), the second supporting arm (17) is rotatably connected with the abutting plate (14), the inside of the shell (1) is fixedly connected with a sliding rod (18) on the two sides of the bidirectional screw (13), the sliding rod (18) is slidably connected with the lifting seat (16).

3. The multi-arm well caliper logging instrument of claim 1, wherein: The bottom of the shell (1) is provided with an arc-shaped front end (19), the inside of the arc-shaped front end (19) is provided with a camera (20).

4. The multi-arm well caliper logging instrument of claim 1, wherein: The top and bottom of the vertical pipe (3) are provided with a connecting module (21).

5. The multi-arm well caliper logging instrument of claim 1, wherein: The top of the shell (1) is provided with a connecting rod (22).

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