Distributed logging fiber optic wellhead hanger

Abstract

The application relates to the technical field of optical fiber wellhead suspension devices, and is a distributed well logging optical fiber wellhead suspension device which comprises a rack, a cross beam, a pressing mechanism, an adjusting mechanism and a pushing mechanism. A mounting cavity penetrating from top to bottom is arranged in the middle of the rack, the left side of the inside of the rack is provided with the cross beam arranged in the front-rear direction, the right side of the cross beam is provided with the pressing mechanism, the pressing mechanism comprises a left pressing part and a right pressing part, the right pressing part comprises a transmission belt, transmission wheels and a movable plate, a plurality of transmission wheels are arranged on the left side of the movable plate in a top-bottom interval, and the transmission belt connected at the head and the tail covers the transmission wheel located at the uppermost end and the transmission wheel located at the lowermost end. The application has the advantages of reasonable and compact structure and convenient use. The speed of the optical fiber downhole can be adjusted through the pressing mechanism, the optical fiber can be clamped on the ground optical fiber equipment after the optical fiber is broken, and the optical fiber after being broken can be effectively prevented from falling into the wellbore.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical fiber wellhead suspension device, and is a distributed logging optical fiber wellhead suspension device. BACKGROUND

[0002] With the vigorous development of China's oil and gas industry, the demand for full life cycle detection of oil and gas wells is becoming more and more prominent. Because distributed optical fiber has the advantages of high precision, good safety, operation time period, etc., it is more and more widely used in logging industry. At present, distributed optical fiber is mostly used in downhole testing operation by using coiled tubing and composite optical cable. Although these tools can improve the safety of optical fiber, they will affect the precision of optical fiber testing. Therefore, in order to obtain more accurate test precision, the optical fiber is usually directly lowered into the wellbore. Because the optical fiber has small diameter and relatively poor load bearing capacity, it is easy to break and fall into the wellbore, causing accidents. In order to improve the safety of optical fiber logging, reduce the cost of logging operation, improve the efficiency of logging and save the cost of drilling, a method for preventing the optical fiber from breaking and falling into the wellbore is needed. SUMMARY

[0003] The present application provides a distributed logging optical fiber wellhead suspension device, which overcomes the shortcomings of the prior art and effectively solves the problem of safety hazards caused by the easy breakage of the optical fiber directly lowered into the wellbore.

[0004] The technical scheme of the present application is realized by the following measures: a distributed logging optical fiber wellhead suspension device, comprising a rack, a cross beam, a pressing mechanism, an adjusting mechanism and a pushing mechanism, a through installation cavity is arranged in the middle of the rack, a cross beam is arranged in the front-rear direction on the left side of the inside of the rack, a pressing mechanism is arranged on the right side of the cross beam, the pressing mechanism comprises a left pressing part and a right pressing part, the right pressing part comprises a transmission belt, a transmission wheel and a movable plate, a plurality of transmission wheels are arranged on the left side of the movable plate in an upper-lower interval, a transmission belt connected at the head and tail is covered between the uppermost transmission wheel and the lowermost transmission wheel, the left pressing part and the right pressing part are the same in structure and are distributed in left-right symmetry, the left side of the left pressing part and the right side of the cross beam are installed together, the right side of the right pressing part is provided with a pushing mechanism capable of pushing the movable plate to move leftward, and the cross beam is provided with an adjusting mechanism capable of driving the right pressing part and the pushing mechanism to move leftward and rightward.

[0005] The following is a further optimization or / and improvement of the above-mentioned technical scheme of the application:

[0006] The pushing mechanism can comprise a push rod, a push rod cylinder, a fixed plate, an energy storage spring, an energy storage spring cylinder, an energy storage wheel, a control rod, an excitation rod and a brake mechanism, the right side of the movable plate is provided with the fixed plate, the left side of the fixed plate is provided with two push rod cylinders at intervals in the up-down direction, the right side of the movable plate corresponding to the position of each push rod cylinder is provided with a push rod with the right end located in the push rod cylinder, the left side of the fixed plate is provided with a plurality of energy storage spring cylinders, the energy storage spring cylinders are provided with energy storage springs, the left side of the energy storage spring is provided with an energy storage wheel, the control rod is arranged between the fixed plate and the movable plate, the left end of the energy storage wheel is in abutment with the right side of the control rod, the control rod is provided with a through hole penetrating through left and right sides corresponding to the position of each energy storage wheel below, the upper part of the control rod is connected with the front end of the excitation rod through a connecting pin, the front part of the excitation rod is connected with the rear part of the fixed plate through a fixed pin, and the left side of the excitation rod is provided with the brake mechanism capable of pushing the left part of the excitation rod to lift upward.

[0007] The brake mechanism can comprise an excitation spring cylinder, an excitation spring and an excitation hammer, the right compression part is provided with the excitation spring cylinder in transmission connection with the rear end of the rotating shaft of the uppermost end transmission wheel, the excitation spring cylinder is downwardly open, the excitation spring cylinder is provided with the excitation spring, and the lower end of the excitation spring is provided with the excitation hammer.

[0008] The pushing mechanism can comprise a suspension shaft and a clockwork box, the upper inner side of the frame is provided with the suspension shaft arranged in the front-rear direction, the suspension shaft is provided with the clockwork box and a winding block at intervals in the front-rear direction, the clockwork box is in transmission connection with the suspension shaft, the upper end of the control rod can clamp the clockwork spring in the clockwork box, and the middle part of the winding block is provided with a through hole penetrating through the upper and lower sides.

[0009] The pushing mechanism can comprise a ratchet mechanism, and the front end and the rear end of the suspension shaft are provided with the ratchet mechanism.

[0010] The adjusting mechanism can comprise a driving gear, a driven gear, a screw rod, an adjusting knob and a sliding nut, the left middle part of the cross beam is provided with the driving gear, the front side and the rear side of the driving gear are both in transmission connection with the driven gear, the driven gear is arranged on the cross beam, the middle part of each driven gear is in transmission connection with the screw rod, the right end of the screw rod penetrates through the cross beam and the fixed plate in sequence and is rotatably arranged on the frame, the sliding nut is arranged on each screw rod corresponding to the position of the right side of the fixed plate, the front side of the driving gear is in transmission connection with the adjusting knob, the left part of the adjusting knob is arranged on the frame through a sliding bearing, and the left end of the adjusting knob is located outside the frame.

[0011] The pushing mechanism can further comprise a limiting cylinder, the left side of the fixed plate outside each energy storage spring cylinder is provided with the limiting cylinder, the left part of the limiting cylinder is provided with a limiting hole penetrating through the upper and lower sides, the lower part of the control rod penetrates through the limiting hole, and the middle part of the left side of the limiting cylinder is provided with a communication hole penetrating through the left and right sides.

[0012] The optical fiber device is reasonable and compact in structure, convenient to use, can adjust the speed of the optical fiber downhole through the compression mechanism, can clamp the optical fiber on the ground optical fiber equipment after the optical fiber is broken, and effectively prevents the optical fiber from falling into the wellbore after being broken. BRIEF DESCRIPTION OF DRAWINGS

[0013] FIG. 1 is a schematic view of a front cross-sectional structure of an embodiment of the present application. Figure 1 FIG. 2 is a schematic view of a left cross-sectional structure at A-A of FIG. 1.

[0014] FIG. 3 is a schematic view of an enlarged structure of a control lever in FIG. 1. Figure 2 FIG. 4 is a schematic view of an enlarged structure of a trigger lever in FIG. 1. Figure 1 FIG. 5 is a schematic view of a partial enlarged structure of the control lever and the trigger lever and a fixed plate in FIG. 1.

[0015] FIG. 6 is a schematic view of a partial enlarged structure of the fixed plate in FIG. 1. Figure 3 FIG. 7 is a schematic view of a partial enlarged structure of a movable plate in FIG. 1. Figure 2 FIG. 8 is a schematic view of a partial enlarged structure of the movable plate and the fixed plate in FIG. 1.

[0016] FIG. 9 is a schematic view of a partial enlarged structure of the control lever and the trigger lever in FIG. 1. Figure 4 FIG. 10 is a schematic view of a partial enlarged structure of the control lever and the trigger lever and the fixed plate in FIG. 1. Figure 2 FIG. 11 is a schematic view of a partial enlarged structure of the fixed plate in FIG. 1.

[0017] FIG. 12 is a schematic view of a partial enlarged structure of the movable plate in FIG. 1. Figure 5 FIG. 13 is a schematic view of a partial enlarged structure of the movable plate in FIG. 1. Figure 2 FIG. 14 is a schematic view of a partial enlarged structure of the movable plate in FIG. 1.

[0018] FIG. 15 is a schematic view of a partial enlarged structure of the movable plate in FIG. 1. Figure 6 FIG. 16 is a schematic view of a partial enlarged structure of the movable plate in FIG. 1. Figure 2 FIG. 17 is a schematic view of a partial enlarged structure of the movable plate in FIG. 1.

[0019] In the drawings: 1 is a frame, 2 is a crossbeam, 3 is a mounting cavity, 4 is a transmission belt, 5 is a transmission wheel, 6 is a movable plate, 7 is a push rod, 8 is a push rod cylinder, 9 is a fixed plate, 10 is a force storage spring, 11 is a force storage spring cylinder, 12 is a force storage wheel, 13 is a control lever, 14 is a trigger lever, 15 is a passing hole, 16 is a connecting pin, 17 is a fixing pin, 18 is a trigger spring cylinder, 19 is a trigger spring, 20 is a trigger hammer, 21 is a suspension shaft, 22 is a clockwork box, 23 is a winding block, 24 is a passing hole, 25 is a ratchet mechanism, 26 is a driving gear, 27 is a driven gear, 28 is a screw rod, 29 is an adjusting knob, 30 is a sliding nut, 31 is a sliding bearing, 32 is a limiting cylinder, 33 is a limiting hole, and 34 is a communicating hole. DETAILED DESCRIPTION

[0020] The present application is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present application and the actual situation.

[0021] In the present application, the relative position relationship of each component is described according to the layout of the drawings attached to the specification, such as the position relationship of front, back, top, bottom, left, right, etc. is determined according to the layout direction of the drawings attached to the specification. Figure 1

[0022] The present application will be further described below in conjunction with the embodiments and the drawings:

[0023] Embodiment 1: as shown in the drawings​Figures 1-6 As shown, the distributed logging optical fiber wellhead suspension device comprises a rack 1, a crossbeam 2, a pressing mechanism, an adjusting mechanism, a pushing mechanism, the middle part of the rack 1 is provided with an installation cavity 3 which penetrates up and down, the left part of the inner side of the rack 1 is provided with the crossbeam 2 which is arranged in the front and back direction, the right side of the crossbeam 2 is provided with the pressing mechanism, the pressing mechanism comprises a left pressing part and a right pressing part, the right pressing part comprises a transmission belt 4, a transmission wheel 5 and a movable plate 6, a plurality of transmission wheels 5 are installed on the left side of the movable plate 6 in up and down intervals, the transmission belt 4 which is connected at the head and tail covers between the transmission wheel 5 located at the uppermost end and the transmission wheel 5 located at the lowermost end, the left pressing part and the right pressing part are the same in structure and are distributed in left and right symmetry, the left pressing part and the right pressing part are installed together at the right side of the crossbeam 2, the right side of the right pressing part is provided with the pushing mechanism which can push the movable plate 6 to move leftward, the crossbeam 2 is provided with the adjusting mechanism which can drive the right pressing part and the pushing mechanism to move left and right.

[0024] In use, the optical fiber passes through the left pressing part and the right pressing part after passing through the top of the rack 1, the pushing mechanism and the right pressing part are pulled to move leftward by the adjusting mechanism, so that the optical fiber has appropriate friction with the transmission belt 4, thereby the speed of the optical fiber down the well can be controlled, the pushing mechanism can automatically push the movable plate 6 and the transmission wheel 5 to move leftward when the optical fiber breaks and falls rapidly, so as to clamp the optical fiber and avoid the optical fiber at the lower part from falling into the wellbore.

[0025] The distributed logging optical fiber wellhead suspension device can be further optimized or / and improved according to actual needs:

[0026] Embodiment 2: as shown in the accompanying drawings, Figures 1-6 As shown, the pushing mechanism comprises a push rod 7, a push rod cylinder 8, a fixed plate 9, a force storage spring 10, a force storage spring cylinder 11, a force storage wheel 12, a control rod 13, an excitation rod 14 and a brake mechanism, the right side of the movable plate 6 is provided with the fixed plate 9, the left side of the fixed plate 9 is provided with two push rod cylinders 8 in up and down intervals, the right side of the movable plate 6 corresponding to the position of each push rod cylinder 8 is provided with the push rod 7 whose right end is located in the push rod cylinder 8, the left side of the fixed plate 9 is provided with a plurality of force storage spring cylinders 11, the force storage spring 10 is installed in the force storage spring cylinder 11, the force storage wheel 12 is installed on the left side of the force storage spring 10, the control rod 13 is arranged between the fixed plate 9 and the movable plate 6, the left end of the force storage wheel 12 abuts against the right side of the control rod 13, the control rod 13 is provided with the through hole 15 which penetrates left and right corresponding to the position below each force storage wheel 12, the upper part of the control rod 13 and the front end of the excitation rod 14 are connected together through the connecting pin 16, the front part of the excitation rod 14 and the rear part of the fixed plate 9 are connected together through the fixed pin 17, the left side of the excitation rod 14 is provided with the brake mechanism which can push the left part of the excitation rod 14 to lift upward.

[0027] In use, when the optical fiber normally falls, the force storage wheel 12 is pressed against the control rod 13 to compress the force storage spring 10, when the ground optical fiber is broken, the brake mechanism is actuated to make the excitation rod 14 left part lift up, the excitation rod 14 right part is pressed down, thereby driving the control rod 13 to move down, when the force storage wheel 12 is aligned with the through hole 15, the force storage wheel 12 passes through the through hole 15 and is pressed against the movable plate 6 right side, under the restoring force of the force storage spring 10, the movable plate 6 is pushed to move left, thereby being able to clamp the optical fiber to avoid it falling into the wellbore.

[0028] Embodiment 3: as shown in the accompanying Figures 1-2 The brake mechanism includes an excitation spring barrel 18, an excitation spring 19, and an excitation hammer 20, the right compression part is provided with the excitation spring barrel 18 which is transmissionally connected with the rotating shaft of the uppermost end transmission wheel 5, the excitation spring barrel 18 is downwardly opened, the excitation spring 19 is installed in the excitation spring barrel 18, and the excitation hammer 20 is installed at the lower end of the excitation spring 19.

[0029] When the optical fiber is lowered, the transmission wheel 5 is driven to rotate by friction, the transmission wheel 5 drives the rotating shaft to rotate, the rotating shaft drives the excitation spring barrel 18 to rotate, the spring in the excitation spring barrel 18 is connected with the excitation hammer 20, the faster the rotating speed is, the longer the part of the excitation hammer 20 extending out of the excitation spring barrel 18 is, when the optical fiber breaks and falls rapidly, the length reaches a certain value, the excitation hammer 20 will hit the excitation rod 14 to push the left part of the excitation rod 14 to lift up, thereby the right part presses down the control rod 13, the force storage wheel 12 passes through the control rod 13 to push the movable plate 6 to move left to clamp the optical fiber.

[0030] Embodiment 4: as shown in the accompanying Figures 1-2 It further includes a suspension shaft 21 and a clockwork box 22, the suspension shaft 21 is installed in the upper inner side of the frame 1 and is arranged in the front-rear direction, the clockwork box 22 and a winding block 23 are arranged at intervals in the front-rear direction on the suspension shaft 21, the clockwork box 22 is transmissionally connected with the suspension shaft 21, the control rod 13 upper end can clamp the clockwork spring in the clockwork box 22, and the winding block 23 is provided with a through hole 24 which is vertically through.

[0031] In use, the optical fiber passes through the through hole 24 and then passes through between the left compression part and the right compression part, the clockwork box 22 accumulates energy in the initial state, and the clockwork spring is locked by the control rod 13 upper end, when the brake mechanism is actuated to make the control rod 13 fall, the clockwork spring is unlocked, thereby releasing energy, driving the suspension shaft 21 and the winding block 23 to rotate, winding the optical fiber through the winding block 23, thereby avoiding the optical fiber from falling into the wellbore.

[0032] Embodiment 5: as shown in the accompanying Figure 2 It further includes a ratchet mechanism 25, the suspension shaft 21 is provided with the ratchet mechanism 25 at the front end and the rear end.

[0033] The ratchet mechanism 25 is arranged to avoid the suspension shaft 21 from being reversed.

[0034] Example 6: As shown in the appendix Figures 1-2 As shown, the adjustment mechanism includes a drive gear 26, a driven gear 27, a screw 28, an adjustment knob 29, and a sliding nut 30. The drive gear 26 is installed in the middle of the left side of the crossbeam 2. The drive gear 26 is connected to the driven gear 27 on both the front and rear sides. The driven gear 27 is installed on the crossbeam 2. The middle of each driven gear 27 is connected to the screw 28. The right end of the screw 28 passes through the crossbeam 2 and the fixing plate 9 in sequence and is rotatably installed with the frame 1. A sliding nut 30 is installed on each screw 28 corresponding to the right side of the fixing plate 9. The front side of the drive gear 26 is connected to the adjustment knob 29. The left side of the adjustment knob 29 is installed on the frame 1 through a sliding bearing 31. The left end of the adjustment knob 29 is located outside the frame 1.

[0035] Rotating the adjustment knob 29 drives the drive gear 26 to rotate, which in turn drives the driven gear 27 to rotate. The driven gear 27 then drives the screw 28 to rotate, causing the sliding nut 30 to move to the left. This, in turn, moves the push mechanism and the right clamping part to the left, adjusting the friction between the optical fiber and the transmission belt 4, thereby adjusting the speed at which the optical fiber is lowered.

[0036] Example 7: As attached Figure 1 , 2 As shown in Figure 5, the pushing mechanism also includes a limiting cylinder 32. A limiting cylinder 32 is installed on the left side of the fixing plate 9 on the outside of each energy storage spring cylinder 11. The left side of the limiting cylinder 32 is provided with a limiting hole 33 that runs vertically through it. The lower part of the control rod 13 passes through the limiting hole 33. The middle left side of the limiting cylinder 32 is provided with a connecting hole 34 that runs horizontally through it.

[0037] By setting the limiting cylinder 32, the control rod 13 can be inserted into the limiting hole 33 to maintain the distance between the control rod 13 and the fixed plate 9, and the movement direction of the control rod 13 can be restricted. When the right side of the excitation rod 14 is pressed down, the control rod 13 can only move downward, thereby ensuring that the power storage wheel 12 can pass through the through hole to push the movable plate 6.

[0038] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A distributed logging fiber optic wellhead suspension device, characterized in that... The device includes a frame, a crossbeam, a clamping mechanism, an adjusting mechanism, and a pushing mechanism. The frame has a vertically penetrating mounting cavity in the middle. A crossbeam with a front-to-back orientation is installed on the left side of the frame. A clamping mechanism is located on the right side of the crossbeam. The clamping mechanism includes a left clamping part and a right clamping part. The right clamping part includes a transmission belt, transmission wheels, and a movable plate. Several transmission wheels are installed vertically and vertically on the left side of the movable plate. A transmission belt connected end to end covers the transmission wheel at the top and bottom. The left and right clamping parts have the same structure and are symmetrically distributed. The left side of the left clamping part is installed together with the right side of the crossbeam. A pushing mechanism that can push the movable plate to the left is located on the right side of the right clamping part. An adjusting mechanism that can drive the right clamping part and the pushing mechanism to move left and right is located on the crossbeam. The pushing mechanism includes a push rod, a push rod cylinder, a fixed plate, a accumulating spring, an accumulating spring cylinder, an accumulating wheel, a control rod, an excitation rod, and a braking mechanism. A fixed plate is located on the right side of the movable plate. Two push rod cylinders are spaced vertically on the left side of the fixed plate. A push rod with its right end inside the push rod cylinder is located on the right side of the movable plate corresponding to each push rod cylinder position. Several accumulating spring cylinders are located on the left side of the fixed plate. Accumulating springs are installed inside the accumulating spring cylinders. An accumulating wheel is installed on the left side of the accumulating springs. A control rod is located between the fixed plate and the movable plate. The left end of the accumulating wheel abuts against the right side of the control rod. A through hole is provided on the control rod below each accumulating wheel. The upper part of the control rod is connected to the front end of the excitation rod by a connecting pin. The front part of the excitation rod is connected to the rear of the fixed plate by a fixed pin. A braking mechanism is located on the left side of the excitation rod, which can push the left part of the excitation rod upward. The braking mechanism includes an excitation spring cylinder, an excitation spring, and an excitation hammer. The excitation spring cylinder is connected to the rear end of the rotating shaft of the uppermost transmission wheel in the right clamping part. The opening of the excitation spring cylinder faces downward. An excitation spring is installed inside the excitation spring cylinder, and an excitation hammer is installed at the lower end of the excitation spring. The transmission wheel drives the rotating shaft to rotate, which in turn drives the excitation spring cylinder to rotate. The spring inside the excitation spring cylinder is connected to the excitation hammer. The faster the rotation speed, the longer the part of the excitation hammer extends out of the excitation spring cylinder. When the optical fiber breaks and falls rapidly, the length reaches a certain value, and the excitation hammer will hit the excitation rod.

2. The distributed logging fiber optic wellhead suspension device according to claim 1, characterized in that... It also includes a suspension shaft and a spring box. A suspension shaft with a front-to-back orientation is installed on the inner side of the upper part of the frame. A spring box and a winding block are spaced apart on the suspension shaft. The spring box is connected to the suspension shaft. The upper end of the control lever can hold the spring spring in the spring box. The winding block has a through hole in the middle.

3. The distributed logging fiber optic wellhead suspension device according to claim 2, characterized in that... It also includes a ratchet mechanism, with ratchet mechanisms at both the front and rear ends of the suspension shaft.

4. The distributed logging fiber optic wellhead suspension device according to claim 1, 2, or 3, characterized in that... The adjustment mechanism includes a drive gear, a driven gear, a screw, an adjustment knob, and a sliding nut. The drive gear is installed in the middle of the left side of the crossbeam. Driven gears are driven to both the front and rear sides of the drive gear. The driven gears are installed on the crossbeam. Each driven gear is driven to the middle of a screw. The right end of the screw passes through the crossbeam and the fixed plate in sequence and is rotatably mounted with the frame. A sliding nut is installed on each screw corresponding to the right side of the fixed plate. An adjustment knob is driven to the front of the drive gear. The left side of the adjustment knob is mounted on the frame through a sliding bearing. The left end of the adjustment knob is located outside the frame.

5. The distributed logging fiber optic wellhead suspension device according to claim 1, 2, or 3, characterized in that... The driving mechanism also includes a limit cylinder. A limit cylinder is installed on the left side of the fixing plate on the outside of each energy storage spring cylinder. The left side of the limit cylinder has a limit hole that runs vertically through it. The lower part of the control rod passes through the limit hole. The middle left side of the limit cylinder has a connecting hole that runs horizontally through it.

6. The distributed logging fiber optic wellhead suspension device according to claim 4, characterized in that... The driving mechanism also includes a limit cylinder. A limit cylinder is installed on the left side of the fixing plate on the outside of each energy storage spring cylinder. The left side of the limit cylinder has a limit hole that runs vertically through it. The lower part of the control rod passes through the limit hole. The middle left side of the limit cylinder has a connecting hole that runs horizontally through it.

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