Bidirectional measurement caliper

Abstract

The utility model discloses a two-way measuring caliper which comprises a supporting rod and shells symmetrically arranged at the two ends of the supporting rod, push-pull rods, opening mechanisms and displacement sensors are arranged in the two shells, the opening mechanisms provide pushing force for the push-pull rods at the two ends to get close to each other, the two-way measuring caliper further comprises a plurality of sets of supporting arms arranged on the periphery of the supporting rod, and every two sets of supporting arms form one set. The outer ends of the two supporting arms in the same group are hinged to one sides of the inner ends of the two shells respectively, the inner ends of the two supporting arms are hinged and provided with rolling wheels, the inner wall of a well to be measured can push the rolling wheels to be close to the supporting rods so as to push the push-pull rods at the two ends to be away from each other, and the displacement sensors are used for detecting displacement data of the corresponding push-pull rods. By arranging the structure with the two symmetrical ends, the caliper can measure the diameter of a to-be-measured well in the process of going up to the well or going down to the well, and compared with a traditional caliper which can only measure the diameter in one direction, the working efficiency is improved, and the detection steps are simplified.

Description

Technical Field

[0001] This utility model relates to the field of downhole measurement, and in particular to a bidirectional wellbore measuring instrument. Background Technology

[0002] With the development of oilfield exploration technology, the number of highly deviated and horizontal wells in oilfields has increased. It is necessary to be able to measure the well diameter when the logging instrument is lowered into the well and pulled up. Traditional logging instruments can only measure the well diameter when pulled up. When the instrument is lowered into the well, the push arm is in a retracted state and the well diameter cannot be measured, which means that it is impossible to measure when lowered into the well, resulting in low measurement efficiency.

[0003] Furthermore, the measurement process requires motor drive, which complicates the structure and makes the measurement steps cumbersome.

[0004] Therefore, how to provide a bidirectional wellbore measuring instrument that can measure wellbore diameter both during downhole and uphole operations is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a bidirectional wellbore measuring instrument. By setting a symmetrical structure at both ends, the instrument can measure the diameter of the well to be measured during both the upper and lowering of the well, thereby improving work efficiency and simplifying the detection steps.

[0006] To solve the above-mentioned technical problems, this utility model provides a bidirectional wellbore measuring instrument, including a support rod and housings symmetrically arranged at both ends of the support rod. Each of the two housings is equipped with a push-pull rod, a spreading mechanism, and a displacement sensor. The spreading mechanism provides a thrust to bring the push-pull rods at both ends closer together. The instrument also includes multiple sets of support arms arranged in pairs around the outer periphery of the support rod. The outer ends of the two support arms in the same group are respectively hinged to one side of the inner end of the two housings. The inner ends of the two support arms are hinged and equipped with rollers. The inner wall of the well to be measured can push the rollers closer to the support rod, thereby pushing the push-pull rods at both ends further apart. The displacement sensor is used to detect the displacement data of the corresponding push-pull rod.

[0007] Preferably, a sliding sleeve is provided in the middle of the housing, and the push-pull rod passes through the sliding sleeve.

[0008] Preferably, the spreading mechanism includes a spring, a spring seat is installed at the outer end of the push-pull rod, the inner end of the spring abuts against the spring seat, and the outer end of the spring abuts against the limiting step inside the housing.

[0009] Preferably, the system further includes a connecting rod, the inner end of which is connected to the spring seat, and the outer end of which is connected to the displacement sensor.

[0010] Preferably, the inner end of the push-pull rod is connected to a guide rod, and a guide hole is provided at a corresponding position inside the housing, with the inner end of the guide rod inserted into the guide hole.

[0011] Preferably, the outer end of the upper housing is provided with an upper connector, and the outer end of the lower housing is provided with a lower connector.

[0012] Preferably, a connecting half-shaft is fixedly installed at the inner end of the push-pull rod, and a bending structure is provided at the outer end of the support arm. The housing is hinged at the inflection point of the bending structure, and the connecting half-shaft is movably connected at the end of the bending structure.

[0013] Preferably, the support arm includes a slide rail and a slide rod installed in the slide rail, and is positioned by a limiting pin. The inner ends of the two slide rods are hinged and connected to the roller.

[0014] Preferably, a notch is provided on the outer periphery of the inner end of the housing, and the outer end of the slide rail is embedded in the corresponding notch.

[0015] Preferably, the system includes four sets of evenly arranged support arms, and each housing is provided with four push-pull rods, four opening mechanisms, and four displacement sensors.

[0016] This utility model provides a bidirectional wellbore measuring instrument, including a support rod and housings symmetrically arranged at both ends of the support rod. Each housing is equipped with a push-pull rod, a spreading mechanism, and a displacement sensor. The spreading mechanism provides a thrust to bring the push-pull rods at both ends closer together. It also includes multiple sets of support arms arranged in pairs around the outer periphery of the support rod. The outer ends of the two support arms in the same group are respectively hinged to one side of the inner end of the two housings. The inner ends of the two support arms are hinged and equipped with rollers. The inner wall of the well to be measured can push the rollers closer to the support rod, so as to push the push-pull rods at both ends further apart. The displacement sensor is used to detect the displacement data of the corresponding push-pull rod.

[0017] By setting up a symmetrical structure at both ends, the caliper can measure the diameter of the well to be logged during both the up-and-down process. Compared with traditional calipers that can only measure in one direction, this improves work efficiency and simplifies the inspection process. Attached Figure Description

[0018] Figure 1 A schematic diagram of a specific embodiment of the bidirectional wellbore measuring instrument provided by this utility model;

[0019] Figure 2 A partially enlarged view of a specific embodiment of the bidirectional measuring wellbore instrument provided by this utility model;

[0020] Figure 3 This is an external schematic diagram of a specific embodiment of the bidirectional measuring wellbore instrument provided by this utility model.

[0021] The components include: support rod 1, housing 2, push-pull rod 3, displacement sensor 4, roller 5, base 6, sliding sleeve 7, spring 8, spring seat 9, connecting rod 10, guide rod 11, upper connector 12, lower connector 13, connecting half shaft 14, bending structure 15, slide rail 16, slide rod 17, and limit pin 18. Detailed Implementation

[0022] The purpose of this invention is to provide a bidirectional wellbore measuring instrument. By setting a symmetrical structure at both ends, the instrument can measure the diameter of the well to be measured during both the upper and lowering of the well, thereby improving work efficiency and simplifying the detection steps.

[0023] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Please refer to Figures 1 to 3 , Figure 1 A schematic diagram of a specific embodiment of the bidirectional wellbore measuring instrument provided by this utility model; Figure 2 A partially enlarged view of a specific embodiment of the bidirectional measuring wellbore instrument provided by this utility model; Figure 3 This is an external schematic diagram of a specific embodiment of the bidirectional measuring wellbore instrument provided by this utility model.

[0025] This utility model provides a bidirectional wellbore measuring instrument, including a support rod 1 and housings 2 symmetrically arranged at both ends of the support rod 1. The components within the two housings 2 are also symmetrically arranged. Each housing 2 contains a push-pull rod 3, a spreading mechanism, and a displacement sensor 4. Of the two identical components arranged symmetrically, the end closer to each other is the inner end, and the end further apart is the outer end. The extension directions of the two housings 2 and the extension directions of the push rods 3 at both ends are parallel to the extension direction of the support rod 1, forming a rod structure with the support rod 1 at the center and the two housings 2 extending outwards. The two spreading mechanisms provide thrust to the push-pull rods 3 at both ends, allowing the push-pull rods 3 to approach each other. Furthermore, the outer end of the upper housing 2 is provided with an upper connector 12, and the outer end of the lower housing 2 is provided with a lower connector 13. The displacement sensor 4 is mounted on a base 6 inside the housing 2.

[0026] Simultaneously, it also includes multiple sets of support arms arranged in pairs around the outer periphery of the support rod 1. The outer ends of the two support arms in the same group are respectively hinged to one side of the inner end of the two housings 2. The inner ends of the two support arms are hinged and equipped with rollers 5. The two support arms support the rod 1 to form a triangular frame mechanism. Each roller 5 abuts against the inner wall of the well to be measured. During the movement of the well caliper, the rollers 5 roll relative to the inner wall, so that they will not get stuck during the measurement. Before entering the well, the distance between each roller 5 is made slightly larger than the wellhead diameter of the well to be measured. Then, the well caliper is placed into the well to be measured. At this time, the inner wall of the well to be measured pushes each roller 5 closer together, and then the two support arms in the same group push the corresponding two push-pull rods 3 away from each other. The displacement data of the push-pull rods 3 is detected by the corresponding displacement sensor 4 and transmitted to the computer. The computer quickly obtains the diameter of the well to be measured.

[0027] Because of its symmetrical structure at both ends, the well caliper moves in both directions with the same structure at both ends, so there is no need to distinguish the direction of travel. This allows the well caliper to measure the diameter of the well to be logged during both the up-and-down process. Compared with traditional well calipers that can only measure in one direction, this improves work efficiency and simplifies the detection process.

[0028] In the bidirectional measuring wellbore instrument provided in the specific embodiment of this utility model, in order to ensure the smooth movement of the push-pull rod 3, a sliding sleeve 7 is provided in the middle of the housing 2. The push-pull rod 3 passes through the sliding sleeve 7, and the sliding sleeve 7 is used to guide and limit the movement of the push-pull rod 3.

[0029] Specifically, the opening mechanism includes a spring 8, a spring seat 9 installed at the outer end of the push-pull rod 3, the inner end of the spring 8 abutting against the spring seat 9, and the outer end of the spring 8 abutting against the limiting step inside the housing 2. During use, when the push-pull rod 3 moves outward, the spring is compressed by the spring seat 9, forming a mutually pressing structure. As the roller 5 slides along the inner wall of the well to be measured, the spring 8 can always apply a pushing force to the roller 5, ensuring that it is always in contact with the well wall, thereby ensuring the accuracy of the measurement. In addition, the elastic rebound of the spring 8 itself serves as the power source for the measurement, replacing the motor drive of the traditional well caliper, which makes the entire well caliper measurement structure simpler.

[0030] Furthermore, it also includes a connecting rod 10, the inner end of which is connected to a spring seat 9, and the outer end of which is connected to a displacement sensor 4. The connecting rod 10 passes through the spring 8, and the displacement sensor 4 is located at the outer end of the limiting step. A guide rod 11 is connected to the inner end of the push-pull rod 3, and a guide hole is provided at a corresponding position inside the housing 2. The inner end of the guide rod 11 is inserted into the guide hole. Thus, the connecting rod 10 at the outer end of the push-pull rod 3 is guided by the limiting step, and the guide rod 11 at the inner end of the push-pull rod 3 is guided by the guide hole. The above describes the internal structure of one end of the housing 2; the internal structures of both ends of the housing 2 are identical and symmetrically arranged.

[0031] Based on the bidirectional measuring well caliper provided in the above specific embodiments, a connecting half shaft 14 is fixedly installed at the inner end of the push-pull rod 3. Specifically, threaded holes are provided at both ends of the connecting half shaft 14, and external threads are provided at the inner end of the push-pull rod 3. Similarly, external threads are provided at the outer end of the guide rod 11, so that the three are threadedly connected. Of course, other connection methods, such as snap-fit ​​or plug-in, can also be used, all of which are within the protection scope of this utility model.

[0032] The support arm has a bent structure 15 at its outer end, forming an L-shaped structure. The housing 2 is hinged at the inflection point of the bent structure 15, and the half-shaft 14 is movably connected to the end of the bent structure 15. Specifically, the housing 2 is connected to the inflection point of the bent structure 15 via a pivot pin. An opening groove is provided at the end of the bent structure 15, and a positioning pin is provided in the middle of the connecting half-shaft 14. The positioning pin is embedded in the opening groove, allowing relative rotation and a certain linear displacement during movement, thus increasing the degree of freedom of movement. Notches are provided on both sides of the inner end of the housing 2, and a slide rail 16 is embedded in the corresponding notches.

[0033] Preferably, the support arm includes a slide rail 16 and slide rods 17 installed in the slide rail 16 and positioned by a limiting pin 18. The inner ends of the two slide rods 17 are hinged and connected to rollers 5.

[0034] When the caliper is placed into the well to be tested, the inner wall of the well pushes the roller 6 toward the support rod 1. When the long arm at the beginning of the bent structure 15 is squeezed by external force, the short arm at the end of the bent structure 15 rotates around the connecting half shaft 14 under the drive of the long arm. The short arm of the bent structure 15 pushes the connecting half shaft 14, thereby pushing the push-pull rod 3 to move outward. That is, the two support arms push the two push-pull rods 3 away from each other. The displacement data of the push-pull rods 3 is detected by the corresponding displacement sensor 4 and transmitted to the computer. The computer quickly obtains the diameter of the well to be tested.

[0035] Specifically, it includes four sets of evenly arranged support arms, with a cross-shaped cross section when viewed from above. Each housing 2 is equipped with four push-pull rods 3, four opening mechanisms, and four displacement sensors 4. The four sets of components are alternately arranged inside the housing 2, and the space is reasonably arranged. The four sets of displacement sensors 4 at both ends work together to improve the reliability of the equipment. The number and layout of each component can also be adjusted according to the situation, all of which are within the protection scope of this utility model.

[0036] The bidirectional wellbore measuring instrument provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A bidirectional wellbore measuring instrument, characterized in that, The system includes a support rod (1) and housings (2) symmetrically arranged at both ends of the support rod (1). Each housing (2) is equipped with a push-pull rod (3), a spreading mechanism, and a displacement sensor (4). The spreading mechanism provides a thrust for the push-pull rods (3) at both ends to move closer to each other. The system also includes multiple sets of support arms arranged on the outer periphery of the support rod (1) in pairs. The outer ends of the two support arms in the same group are respectively hinged to one side of the inner end of the two housings (2). The inner ends of the two support arms are hinged and equipped with rollers (5). The inner wall of the well to be tested can push the rollers (5) closer to the support rod (1) so as to push the push-pull rods (3) at both ends away from each other. The displacement sensor (4) is used to detect the displacement data of the corresponding push-pull rod (3).

2. The bidirectional wellbore measuring instrument according to claim 1, characterized in that, A sliding sleeve (7) is provided in the middle of the housing (2), and the push-pull rod (3) passes through the sliding sleeve (7).

3. The bidirectional wellbore measuring instrument according to claim 2, characterized in that, The opening mechanism includes a spring (8), and a spring seat (9) is installed on the outer end of the push-pull rod (3). The inner end of the spring (8) abuts against the spring seat (9), and the outer end of the spring (8) abuts against the limiting step inside the housing (2).

4. The bidirectional wellbore measuring instrument according to claim 3, characterized in that, It also includes a connecting rod (10), the inner end of which is connected to the spring seat (9), and the outer end of which is connected to the displacement sensor (4).

5. The bidirectional wellbore measuring instrument according to claim 4, characterized in that, The inner end of the push-pull rod (3) is connected to a guide rod (11), and a guide hole is provided in the corresponding position inside the housing (2). The inner end of the guide rod (11) is inserted into the guide hole.

6. The bidirectional wellbore measuring instrument according to claim 1, characterized in that, The outer end of the upper housing (2) is provided with an upper connector (12), and the outer end of the lower housing (2) is provided with a lower connector (13).

7. The bidirectional wellbore measuring instrument according to any one of claims 1 to 6, characterized in that, The inner end of the push-pull rod (3) is fixedly installed with a connecting half shaft (14), and the outer end of the support arm is provided with a bending structure (15). The shell (2) is hinged at the inflection point of the bending structure (15), and the end of the bending structure (15) is movably connected to the connecting half shaft (14).

8. The bidirectional wellbore measuring instrument according to claim 7, characterized in that, The support arm includes a slide rail (16) and slide rods (17) installed in the slide rail (16), and is positioned by a limiting pin (18). The inner ends of the two slide rods (17) are hinged and connected to the roller (5).

9. The bidirectional wellbore measuring instrument according to claim 8, characterized in that, The outer periphery of the inner end of the housing (2) is provided with a notch, and the outer end of the slide rail (16) is embedded in the corresponding notch.

10. The bidirectional wellbore measuring instrument according to claim 9, characterized in that, It includes four sets of support arms that are evenly arranged, and each housing (2) is provided with four push-pull rods (3), four opening mechanisms and four displacement sensors (4).

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