Automated collar detection device and method for well repair

Abstract

The present invention relates to the technical field of oilfield well repair equipment, and in particular to an automated well repair coupling detection device and detection method. The device comprises a mounting frame, wherein the mounting frame is rotatably connected to a plurality of rotating frames, wherein the rotating frames are slidably connected to connecting rods, and all the connecting rods are rotatably connected to a positioning frame, wherein the positioning frame is fixed to an elastic body and a fixed rod, wherein the fixed rod is fixed to a winding rope, wherein the winding rope is wound around the outside of the elastic body, wherein the positioning frame is fixed to a mounting rod, wherein the mounting rod is provided with a sliding frame, wherein the sliding frame is fixed to a pull rope displacement sensor, and wherein the winding rope is connected to the pull rope displacement sensor. The present invention causes the elastic body to drive the positioning frame to shift along with the oil pipe when the oil pipe shifts, so that the axis of the oil pipe always coincides with the axis of the positioning frame, thereby reducing the movement of the winding rope caused by the oil pipe shift, reducing the error in the coupling detection, and thus improving the detection accuracy of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of oilfield well repair equipment, and in particular to an automated well repair coupling detection device and a detection method. Background Art

[0002] The coupling detection device used in oil wells is a crucial downhole tool. Its function is to determine the depth of each coupling. During the process of pulling out the pipe rod in the workover operation of pressurized oil, water and gas wells, when the coupling approaches the lower half-sealed blowout preventer group, the upper half-sealed blowout preventer must be closed first, and then the lower half-sealed blowout preventer must be opened, so that the coupling can first pass through the lower half-sealed blowout preventer and move between the upper and lower half-sealed blowout preventers. Then the lower half-sealed blowout preventer is closed and the upper half-sealed blowout preventer is opened to pull out the pipe rod under pressure, thereby avoiding accidents such as blowouts. In this process, the position of the coupling needs to be precisely controlled. Otherwise, if the pipe rod coupling scrapes against the sealant core and other parts inside the blowout preventer during construction, it will cause damage to the blowout preventer and even cause serious accidents such as blowouts. The process of running the oil pipe and sucker rod is the same as above.

[0003] The existing detection device has a pull-rope type detection device, which wraps a pull rope around the outside of an elastic body, and then makes the elastic body clamp the pipe rod. When the coupling passes through the elastic body, it squeezes the elastic body to expand outward, and the pull rope wrapped around the elastic body will be pulled. The movement distance of the pull rope is used to determine whether a coupling has passed. However, this method will cause the elastic body to drive the pull rope to move when the pipe rod is offset, thereby pulling the pull rope, resulting in large errors when detecting the coupling. Summary of the Invention

[0004] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides an automated well repair coupling detection device and detection method.

[0005] The technical implementation scheme of the present invention is: an automated coupling detection device for well repair, including a mounting frame, the mounting frame is rotatably connected to a plurality of rotating frames, the rotating frames are slidably connected to connecting rods, all of the connecting rods are rotatably connected to a positioning frame, the positioning frame is fixed to an elastic body and a fixed rod, the fixed rod is fixed to a winding rope, the winding rope is wound around the outside of the elastic body, the positioning frame is fixed to a mounting rod, the mounting rod is provided with a sliding frame, the sliding frame is fixed to a pull rope displacement sensor, and the winding rope is connected to the pull rope displacement sensor.

[0006] Furthermore, it also includes a mounting part, which is provided in a plurality of pieces, all of which are fixed to the elastomer, and the mounting part passes through the side wall of the elastomer, and the part of the mounting part located outside the elastomer is rotatably connected to a guide roller, and the winding rope is wound around all the guide rollers.

[0007] Furthermore, the guide roller is provided with circular grooves distributed at equal intervals, and the circular grooves are used to separate each circle of the winding rope.

[0008] Furthermore, all the mounting members are distributed at equal intervals in the circumferential direction, and a line connecting two adjacent guide rollers does not pass through the elastic body and is not tangent to the elastic body.

[0009] Furthermore, the portion of the mounting member located inside the elastic body is rotatably connected to a rotating member, and the rotating member is rotatably connected to a roller.

[0010] Furthermore, the roller is located eccentrically of the rotation point of the rotating member.

[0011] Furthermore, the mounting rod is slidably connected to the sliding frame, the sliding frame is slidably connected to a limiting rod, the mounting rod is provided with a plurality of grooves, and the limiting rod is inserted into the grooves to limit the sliding frame.

[0012] Furthermore, the number of the grooves is equal to the number of the circular grooves on one guide roller, and the height of each groove corresponds to the height of each layer of the circular grooves.

[0013] Furthermore, the sliding frame is threadedly connected with a bolt, and the bolt and the limiting rod are pressed against each other.

[0014] The detection method of the automated well workover coupling detection device is based on the above-mentioned automated well workover coupling detection device and specifically includes the following steps:

[0015] S1: First, determine the number of windings of the winding rope, then move the sliding frame to the corresponding position, the sliding frame drives the limit rod and the bolt to move, and stops moving when the limit rod is aligned with the corresponding groove, and the limit rod is inserted into the groove;

[0016] S2: After the limit rod is inserted into the groove, tighten the bolt to squeeze the limit rod. Then, start winding the rope from the nearest circular groove, moving down one layer at a time until it reaches the lowest circular groove, and then connect it to the fixing rod.

[0017] S3: After the winding rope is fixed, the mounting frame is fixed in the use position. Then the oil pipe moves down through the elastic body. During this process, the oil pipe drives the roller to rotate. When the oil pipe moves upward, the oil pipe drives the rotating part to rotate 180 degrees through the roller, and then continues to drive the roller to rotate;

[0018] S4: When the center of the oil pipe deviates, the oil pipe will drive the positioning frame to move through the elastic body, the positioning frame will drive the connecting rod to move, the connecting rod will drive the adjacent rotating frame to rotate, the positioning frame will drive the fixed rod and the mounting rod to move, and the mounting rod will drive the rope displacement sensor through the sliding frame;

[0019] S5: When the coupling contacts the roller, the roller drives the elastic body to expand through the rotating part and the mounting part 11, and the length of the part of the winding rope wrapped around the elastic body increases, pulling out the part located in the rope displacement sensor. The rope displacement sensor records the distance the winding rope is pulled out and transmits the data to the control terminal, which calculates whether the coupling has passed through.

[0020] The beneficial effects of the present invention are as follows: when the oil pipe deviates, the elastic body drives the positioning frame to deviate along with the oil pipe, so that the axis of the oil pipe always coincides with the axis of the positioning frame, thereby reducing the movement of the winding rope caused by the deviation of the oil pipe, reducing the error of the docking collar detection, and thus improving the detection accuracy of the device.

[0021] By making the guide roller rotate along with the movement of the winding rope, direct friction between the winding rope and the elastic body is avoided, thereby reducing the wear of the winding rope and the elastic body.

[0022] By driving the roller to rotate via the oil pipe, friction between the oil pipe and the elastomer is avoided, and the roller is located at the eccentric point of the rotating part. Even if the oil pipe in contact with the roller rotates, the roller can make adaptive angle changes, thereby reducing the probability of dynamic friction between the roller and the oil pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 Schematic diagram of the three-dimensional structure of the rotating frame and the connecting rod of the present invention;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the positioning frame and the elastic body of the present invention;

[0026] Figure 4 A sectional view of the three-dimensional structure of the positioning frame and the elastic body of the present invention;

[0027] Figure 5 This is a sectional view of the three-dimensional structure of the mounting rod and the sliding frame of the present invention.

[0028] Figure numbers: 1-mounting frame, 2-rotating frame, 3-connecting rod, 4-positioning frame, 5-elastic body, 6-fixing rod, 7-winding rope, 8-mounting rod, 81-groove, 9-sliding frame, 10-pull rope displacement sensor, 11-mounting part, 12-guide roller, 121-circular groove, 13-rotating part, 14-roller, 15-limiting rod, 16-bolt. DETAILED DESCRIPTION

[0029] The following describes in detail the automated well repair coupling detection device and method provided by the present invention, with reference to the accompanying drawings and specific embodiments. It is also noted that, for the sake of completeness, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative implementations for known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention. Example 1

[0030] Automated collar detection device for workover, such as Figure 1-Figure 5 As shown, it includes a mounting frame 1, which is rotatably connected to six rotating frames 2. The six rotating frames 2 are divided into two layers, three on each layer, and are circumferentially evenly spaced. The rotating frame 2 is slidably connected to a connecting rod 3, and the six connecting rods 3 are rotatably connected to a positioning frame 4. The six connecting rods 3 are divided into two groups, one above the other. The rotating connections between the three connecting rods 3 and the positioning frame 4 in each group are circumferentially evenly spaced, so that the positioning frame 4 can move within a certain range, and each connecting rod 3 is evenly stressed to avoid stress concentration. The positioning frame 4 is fixed with an elastomer 5 and a fixing rod 6. The elastomer 5 is made of a polymer elastic material, so that the elastomer 5 can undergo significant reversible deformation when subjected to external force, and can quickly return to its original shape after the external force is removed. The inner diameter is smaller than the outer diameter of the coupling. The fixed rod 6 is fixed with a winding rope 7. The winding rope 7 can be made of steel wire rope to ensure its tensile performance and reduce its elongation due to tension. The winding rope 7 is wound on the outside of the elastomer 5. When the diameter of the elastomer 5 becomes larger, the diameter of the part of the winding rope 7 wrapped around the elastomer 5 also becomes larger, and the movable end of the winding rope 7 will move. The positioning frame 4 is fixed with a mounting rod 8, and the mounting rod 8 is provided with a sliding frame 9. The sliding frame 9 is fixed with a pull rope displacement sensor 10. The pull rope displacement sensor 10 is an existing device for detecting the distance moved by the winding rope 7. The change in the diameter of the elastomer 5 is calculated by the distance moved by the winding rope 7, so as to determine whether the coupling passes through the elastomer 5. The winding rope 7 is connected to the pull rope displacement sensor 10.

[0031] When using this device to detect the position of the coupling, first install it near the blowout preventer, and then the oil pipe passes through the middle of the elastic body 5. When the coupling contacts the elastic body 5, because the diameter of the coupling is larger than the oil pipe, the elastic body 5 is stretched, and the length of the winding rope 7 wound on the elastic body 5 becomes longer. The winding rope 7 is pulled, and the part located in the rope displacement sensor 10 is pulled out. At the same time, the rope displacement sensor 10 records the distance the winding rope 7 is pulled out. By calculation, it is known whether the coupling has passed. When the center of the oil pipe is offset, the oil pipe will drive the positioning frame 4 to move through the elastic body 5, and the positioning frame 4 drives the connecting rod 3 moves, the connecting rod 3 drives the adjacent rotating frame 2 to rotate, and at the same time, sliding occurs between the two, so that the oil pipe is always maintained at the center of the positioning frame 4, and the positioning frame 4 drives the fixing rod 6 and the installation rod 8 to move, and the installation rod 8 drives the rope displacement sensor 10 to move through the sliding frame 9, so that the winding rope 7 moves as a whole with the elastic body 5, and the winding rope 7 will not be pulled out of the rope displacement sensor 10 due to the deviation of the oil pipe, thereby improving the accuracy of detection. When the coupling passes through the elastic body 5, the elastic body 5 returns to its original shape under the action of its own elasticity, and the rope displacement sensor 10 rewinds the winding rope 7. Example 2

[0032] like Figure 1 、 Figure 3 and Figure 4 As shown, it also includes a mounting member 11, which consists of an inner part, a middle part and an outer part. The inner and outer parts of the mounting member 11 are both arc-shaped plates, and the middle part is a rectangular plate, which connects the outer part and the inner part. There are six mounting members 11, and the six mounting members 11 are all fixed to the elastomer 5. The mounting member 11 passes through the side wall of the elastomer 5. The inner and outer parts of the mounting member 11 clamp the elastomer 5 and are fixed by bolts. The part of the mounting member 11 located on the outside of the elastomer 5 is rotatably connected to the guide roller 12, and the winding rope 7 is wound on all the guide rollers 12. The rotation of the guide rollers 12 reduces the friction of the winding rope 7, thereby extending the service life of the winding rope 7.

[0033] like Figure 4 As shown, the guide roller 12 is provided with seven circular grooves 121 distributed at equal intervals along its axial direction. The circular grooves 121 are used to separate each circle of the winding rope 7, thereby preventing each circle of the winding rope 7 from being squeezed together when the winding rope 7 is wound multiple times. This situation will cause the pressure between the winding rope 7 and the guide roller 12 to increase, thereby increasing the friction between the two, and affecting the normal movement of the winding rope 7.

[0034] like Figure 1 、 Figure 3 and Figure 4 As shown, the six mounting members 11 are circumferentially distributed at equal intervals, and the line connecting two adjacent guide rollers 12 does not pass through the elastic body 5 or is tangent thereto, so that the winding rope 7 wound around the six guide rollers 12 does not contact the elastic body 5.

[0035] After the winding rope 7 is wound around the guide roller 12, when the elastomer 5 is stretched, the six guide rollers 12 move away from each other and rotate under the action of the friction force of the winding rope 7. The winding rope 7 will not directly rub against the elastomer 5, reducing the wear of both. At the same time, each circle of the winding rope 7 is separated by the circular groove 121, so that each circle of the winding rope 7 will not be piled up together and generate friction, thereby avoiding the winding rope 7 from being unable to move due to being piled together and causing breakage. Example 3

[0036] like Figure 4 As shown, the portion of the mounting member 11 located inside the elastic body 5 is rotatably connected to two rotating members 13, which are rotatably connected to rollers 14. Rollers 14 are used to prevent direct friction between the oil pipe and the elastic body 5. Rollers 14 are located eccentrically at the rotation point of rotating member 13. Therefore, when the force direction of rollers 14 changes, rollers 14 can drive the adjacent rotating members 13 to rotate, thereby keeping the axial direction of rollers 14 perpendicular to the force direction.

[0037] When the oil pipe moves downward, the oil pipe drives the roller 14 to rotate. When the oil pipe moves upward, the oil pipe drives the rotating member 13 to rotate 180° through the roller 14, and then continues to drive the roller 14 to rotate, thereby avoiding direct friction between the oil pipe and the elastomer 5 and reducing wear of the elastomer 5. Example 4

[0038] like Figure 5 As shown, the mounting rod 8 is slidably connected to the sliding frame 9, and the height of the pull rope displacement sensor 10 can be changed by sliding the sliding frame 9. The sliding frame 9 is slidably connected to the limit rod 15. The mounting rod 8 is provided with a plurality of grooves 81. The limit rod 15 is provided with an inclined surface on the side close to the groove 81 to facilitate the insertion of the limit rod 15 into the groove 81. The limit rod 15 is inserted into the groove 81 to limit the sliding frame 9.

[0039] like Figure 4 and Figure 5 As shown, the number of grooves 81 is equal to the number of circular grooves 121 on a guide roller 12 , both of which are seven in the figure, and the height of each groove 81 corresponds to the height of each layer of circular grooves 121 .

[0040] like Figure 5 As shown, the sliding frame 9 is threadedly connected with a bolt 16 , and the bolt 16 and the limiting rod 15 are pressed against each other, and the bolt 16 is used to fix the limiting rod 15 .

[0041] After determining the number of turns of the winding rope 7, such as seven turns, the sliding frame 9 is moved upward, and the sliding frame 9 drives the limit rod 15 and the bolt 16 to move. When the limit rod 15 is aligned with the uppermost groove 81, it stops moving and the limit rod 15 is inserted into the groove 81. Then, the bolt 16 is tightened so that the bolt 16 squeezes the limit rod 15 to make the limit rod 15 more stable. At this time, the outlet of the rope displacement sensor 10 is aligned with the uppermost circular groove 121, and the winding rope 7 starts to wind from the uppermost circular groove 121, moves down one layer per turn until it reaches the lowermost circular groove 121, and then is connected to the fixing rod 6. Example 5

[0042] The detection method of the automated collar detection device for workover, such as Figure 1-Figure 5 Based on the above-mentioned automated collar detection device for well repair, the following steps are specifically included:

[0043] S1: First, determine the number of windings of the winding rope 7, then move the sliding frame 9 to the corresponding position, and the sliding frame 9 drives the limiting rod 15 and the bolt 16 to move. When the limiting rod 15 is aligned with the corresponding groove 81, the movement stops and the limiting rod 15 is inserted into the groove 81;

[0044] S2: After the limiting rod 15 is inserted into the groove 81, the bolt 16 is tightened to squeeze the limiting rod 15. Then, the winding rope 7 is wound from the nearest circular groove 121, moving down one layer at a time until it reaches the lowest circular groove 121, and then connected to the fixing rod 6;

[0045] S3: After the winding rope 7 is fixed, the mounting frame 1 is fixed in the use position, and then the oil pipe moves downward through the elastic body 5. During this process, the oil pipe drives the roller 14 to rotate. When the oil pipe moves upward, the oil pipe drives the rotating member 13 to rotate 180 degrees through the roller 14, and then continues to drive the roller 14 to rotate;

[0046] S4: When the center of the oil pipe deviates, the oil pipe drives the positioning frame 4 to move through the elastic body 5, the positioning frame 4 drives the connecting rod 3 to move, the connecting rod 3 drives the adjacent rotating frame 2 to rotate, the positioning frame 4 drives the fixed rod 6 and the installation rod 8 to move, and the installation rod 8 drives the pull rope displacement sensor 10 through the sliding frame 9;

[0047] S5: When the coupling contacts the roller 14, the roller 14 drives the elastic body 5 to expand through the rotating part 13 and the mounting part 11. The length of the portion of the winding rope 7 wrapped around the elastic body 5 increases, and the portion located in the pull rope displacement sensor 10 is pulled out. The pull rope displacement sensor 10 records the distance the winding rope 7 is pulled out and transmits the data to the control terminal, which calculates whether the coupling has passed through.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. The automated collar detection device for well repair is characterized by: The invention comprises a mounting frame (1), wherein the mounting frame (1) is rotatably connected to a plurality of rotating frames (2), the rotating frames (2) are slidably connected to connecting rods (3), all the connecting rods (3) are rotatably connected to a positioning frame (4), the positioning frame (4) is fixed to an elastic body (5) and a fixed rod (6), the fixed rod (6) is fixed to a winding rope (7), the winding rope (7) is wound around the outside of the elastic body (5), the positioning frame (4) is fixed to a mounting rod (8), the mounting rod (8) is provided with a sliding frame (9), the sliding frame (9) is fixed to a pull rope displacement sensor (10), and the winding rope (7) is connected to the pull rope displacement sensor (10); It also includes a mounting member (11), which has a plurality of mounting members (11). All of the mounting members (11) are fixed to the elastic body (5). The mounting member (11) passes through the side wall of the elastic body (5). The portion of the mounting member (11) located outside the elastic body (5) is rotatably connected to a guide roller (12). The winding rope (7) is wound around all of the guide rollers (12). The guide roller (12) is provided with circular grooves (121) distributed at equal intervals, and the circular grooves (121) are used to separate each circle of the winding rope (7); All the mounting members (11) are distributed at equal intervals in the circumferential direction, and a line connecting two adjacent guide rollers (12) does not pass through the elastic body (5) and is not tangent thereto.

2. The automated well repair coupling detection device according to claim 1, characterized in that: The portion of the mounting member (11) located inside the elastic body (5) is rotatably connected to a rotating member (13), and the rotating member (13) is rotatably connected to a roller (14).

3. The automated well repair coupling detection device according to claim 2, characterized in that: The roller (14) is located eccentrically of the rotation point of the rotating member (13).

4. The automated well repair coupling detection device according to claim 3, characterized in that: The mounting rod (8) is slidably connected to the sliding frame (9), and the sliding frame (9) is slidably connected to a limiting rod (15). The mounting rod (8) is provided with a plurality of grooves (81), and the limiting rod (15) is inserted into the grooves (81) to limit the sliding frame (9).

5. The automated well repair coupling detection device according to claim 4, characterized in that: The number of the grooves (81) is equal to the number of the circular grooves (121) on one guide roller (12), and the height of each groove (81) corresponds to the height of each layer of the circular grooves (121).

6. The automated well repair coupling detection device according to claim 5, characterized in that: The sliding frame (9) is threadedly connected with a bolt (16), and the bolt (16) and the limiting rod (15) are pressed against each other.

7. A detection method for an automated well repair coupling detection device, wherein the automated well repair coupling detection device according to claim 6 is characterized in that: The specific steps include: S1: First, determine the number of winding turns of the winding rope (7), then move the sliding frame (9) to the corresponding position, the sliding frame (9) drives the limit rod (15) and the bolt (16) to move, and stops moving when the limit rod (15) is aligned with the corresponding groove (81), and the limit rod (15) is inserted into the groove (81); S2: After the limiting rod (15) is inserted into the groove (81), the bolt (16) is screwed so that the bolt (16) squeezes the limiting rod (15), and then the winding rope (7) is wound from the nearest circular groove (121), moving down one layer at a time until it reaches the lowest circular groove (121), and then connected to the fixing rod (6); S3: After the winding rope (7) is fixed, the mounting frame (1) is fixed in the use position, and then the oil pipe moves downward through the elastic body (5). During this process, the oil pipe drives the roller (14) to rotate. When the oil pipe moves upward, the oil pipe drives the rotating member (13) to rotate 180 degrees through the roller (14), and then continues to drive the roller (14) to rotate; S4: When the center of the oil pipe deviates, the oil pipe drives the positioning frame (4) to move through the elastic body (5), the positioning frame (4) drives the connecting rod (3) to move, the connecting rod (3) drives the adjacent rotating frame (2) to rotate, the positioning frame (4) drives the fixed rod (6) and the installation rod (8) to move, and the installation rod (8) drives the pull rope displacement sensor (10) through the sliding frame (9); S5: When the coupling contacts the roller (14), the roller (14) drives the elastic body (5) to open through the rotating member (13) and the mounting member (11), and the length of the portion of the winding rope (7) wound on the elastic body (5) increases, pulling out the portion located in the rope displacement sensor (10). The rope displacement sensor (10) records the distance the winding rope (7) is pulled out and transmits the data to the control terminal, which calculates whether the coupling has passed through.

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