Distributed logging optical fiber wellhead suspension device

Abstract

The invention relates to the technical field of optical fiber wellhead suspension devices, in particular to 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 vertically-through mounting cavity is formed in the middle of the rack, the cross beam arranged in the front-back direction is mounted on the left portion of the inner side of the rack, and the pressing mechanism is arranged on the right side of the cross beam; and 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 installed on the left side of the movable plate in an up-down spaced mode, and the transmission belt connected end to end covers the position between the transmission wheel located at the uppermost end and the transmission wheel located at the lowermost end. The device is reasonable and compact in structure and convenient to use, the descending speed of the optical fiber can be adjusted through the pressing mechanism, the pushing mechanism is arranged to clamp the optical fiber after the optical fiber on the ground optical fiber equipment is broken, and the optical fiber is effectively prevented from falling into a shaft after being broken.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber wellhead suspension devices, in particular to a distributed logging optical fiber wellhead suspension device. Background Art

[0002] With the vigorous development of my country's oil and gas industry, the demand for full life cycle detection of oil and gas wells has become increasingly prominent. Due to the advantages of high precision, good safety, and long operating time period, distributed optical fiber is increasingly widely used in the logging industry. At present, distributed optical fiber mostly uses continuous tubing and composite optical cables for downhole testing during logging. Although these tools can improve the safety of optical fiber, they will affect the accuracy of optical fiber testing. Therefore, in order to obtain more accurate test accuracy, the optical fiber is usually lowered directly into the wellbore. Due to the small diameter of the optical fiber and its relatively poor ability to bear tensile force, 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 operations, improve logging efficiency, and save drilling costs, it is necessary to take measures to prevent the optical fiber from breaking and falling into the wellbore. Summary of the invention

[0003] The present invention provides a distributed logging optical fiber wellhead suspension device, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problem that the existing optical fiber is easily broken when directly lowered into the wellbore, posing a potential safety hazard.

[0004] The technical solution of the present invention is achieved through the following measures: a distributed logging optical fiber wellhead suspension device, including a frame, a beam, a clamping mechanism, an adjusting mechanism, and a pushing mechanism. An installation cavity that passes through from top to bottom is provided in the middle of the frame, a beam arranged in the front-to-back direction is installed on the left inner side of the frame, a clamping mechanism is provided on the right side of the beam, the clamping mechanism includes a left clamping part and a right clamping part, the right clamping part includes a transmission belt, a transmission wheel and a movable plate, a plurality of transmission wheels are installed at intervals on the left side of the movable plate, a transmission belt connected end to end is covered between the transmission wheel at the uppermost end and the transmission wheel at the lowermost end, the left clamping part and the right clamping part have the same structure and are symmetrically distributed on the left and right sides, the left side of the left clamping part is installed together with the right side of the beam, a pushing mechanism that can push the movable plate to move leftward is provided on the right side of the right clamping part, and an adjusting mechanism that can drive the right clamping part and the pushing mechanism to move leftward and rightward is provided on the beam.

[0005] The following are further optimizations and / or improvements to the above technical solutions: The above-mentioned pushing mechanism may include a push rod, a push rod cylinder, a fixed plate, a force storage spring, a force storage spring cylinder, a force storage wheel, a control rod, an excitation rod and a braking mechanism. A fixed plate is provided on the right side of the movable plate, and two push rod cylinders are provided at intervals on the upper and lower left sides of the fixed plate. A push rod with the right end located in the push rod cylinder is provided on the right side of the movable plate corresponding to the position of each push rod cylinder, a plurality of force storage spring cylinders are provided on the left side of the fixed plate, and a force storage wheel is installed on the left side of the force storage spring. A control rod is provided between the fixed plate and the movable plate, and the left end of the force storage wheel is abutted against the right side of the control rod. A through hole that passes through the left and right sides is provided on the control rod corresponding to the position below each force storage wheel. The upper part of the control rod is connected to the front end of the excitation rod by a connecting pin, and the front part of the excitation rod is connected to the rear part of the fixed plate by a fixing pin. A braking mechanism that can push the left part of the excitation rod to lift up is provided on the left side of the excitation rod.

[0006] The above-mentioned braking mechanism may include an excitation spring cylinder, an excitation spring, and an excitation hammer. The rear end of the rotating shaft of the uppermost transmission wheel in the right clamping part is connected to the excitation spring cylinder in a transmission manner. The opening of the excitation spring cylinder is downward, and an excitation spring is installed in the excitation spring cylinder. The lower end of the excitation spring is installed with an excitation hammer.

[0007] The above may also include a suspension shaft and a clockwork box. A suspension shaft arranged in the front-to-back direction is installed on the inner side of the upper part of the frame. A clockwork box and a winding block are arranged on the suspension shaft at intervals in the front and back. The clockwork box is transmission-connected to the suspension shaft. The upper end of the control rod can clamp the clockwork spring in the clockwork box. A through hole is provided in the middle of the winding block, which passes through from top to bottom.

[0008] The above may also include a ratchet mechanism, and the front end and the rear end of the suspension shaft are both provided with a ratchet mechanism.

[0009] The above-mentioned adjusting mechanism may include a driving gear, a driven gear, a screw, an adjusting knob, and a sliding nut. A driving gear is installed in the middle of the left side of the beam. The front and rear sides of the driving gear are both connected to the driven gears by transmission. The driven gear is installed on the beam. The middle part of each driven gear is connected to the screw by transmission. The right end of the screw passes through the beam and the fixed plate in sequence and is rotatably installed with the frame. A sliding nut is installed on each screw corresponding to the right side of the fixed plate. The front side of the driving gear is connected to the adjusting knob by transmission. The left part of the adjusting knob is installed on the frame through a sliding bearing, and the left end of the adjusting knob is located outside the frame.

[0010] The above-mentioned pushing mechanism may also include a limiting cylinder. A limiting cylinder is installed on the left side of the fixed plate outside each force storage spring cylinder. A limiting hole is provided on the left side of the limiting cylinder and passes through the limiting hole. The lower part of the control rod passes through the limiting hole. A connecting hole is provided on the middle part of the left side of the limiting cylinder and passes through the left and right sides.

[0011] The present invention has a reasonable and compact structure and is easy to use. It can adjust the speed of the optical fiber going down the well through a clamping mechanism, and can clamp the optical fiber after it breaks on the ground optical fiber equipment by setting a pushing mechanism, thereby effectively preventing the optical fiber from falling into the wellbore after it breaks. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 This is a schematic diagram of the front cross-sectional structure of Example 1 of the present invention.

[0013] Attached Figure 2 For attachment Figure 1 Schematic diagram of the left-side cross-sectional structure at AA.

[0014] Attached Figure 3 For attachment Figure 2 Schematic diagram of the enlarged structure of the control rod and excitation rod.

[0015] Attached Figure 4 For attachment Figure 2 Schematic diagram of the partial enlarged structure of the control rod, excitation rod and fixed plate.

[0016] Attached Figure 5 For attachment Figure 2 Schematic diagram of the partial enlarged structure of the fixed plate.

[0017] Attached Figure 6 For attachment Figure 2 Schematic diagram of the partial enlarged structure of the movable plate.

[0018] The codes in the accompanying drawings are: 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 rod, 14 is an excitation rod, 15 is a through hole, 16 is a connecting pin, 17 is a fixing pin, 18 is an excitation spring cylinder, 19 is an excitation spring, 20 is an excitation hammer, 21 is a suspension shaft, 22 is a clockwork box, 23 is a winding block, 24 is a through hole, 25 is a ratchet mechanism, 26 is a driving gear, 27 is a driven gear, 28 is a screw, 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 connecting hole. DETAILED DESCRIPTION

[0019] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0020] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0021] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As attached Figure 1-6As shown, the distributed logging optical fiber wellhead suspension device includes a frame 1, a beam 2, a clamping mechanism, an adjusting mechanism, and a pushing mechanism. A mounting cavity 3 which passes through from top to bottom is provided in the middle of the frame 1. A beam 2 arranged in the front-to-back direction is installed on the left inner side of the frame 1. A clamping mechanism is provided on the right side of the beam 2. The clamping mechanism includes a left clamping part and a right clamping part. The right clamping part includes a transmission belt 4, a transmission wheel 5 and a movable plate 6. A plurality of transmission wheels 5 are installed at intervals on the left side of the movable plate 6. The transmission belt 4 connected end to end is covered between the transmission wheel 5 located at the uppermost end and the transmission wheel 5 located at the lowermost end. The left clamping part has the same structure as the right clamping part and is symmetrically distributed on the left and right sides. The left side of the left clamping part is installed together with the right side of the beam 2. A pushing mechanism which can push the movable plate 6 to move leftward is provided on the right side of the right clamping part. An adjusting mechanism which can drive the right clamping part and the pushing mechanism to move left and right is provided on the beam 2.

[0022] When in use, the optical fiber passes through the top of the frame 1 and then passes between the left clamping part and the right clamping part. The pushing mechanism and the right clamping part are pulled to the left by the adjusting mechanism, so that there is a suitable friction force between the optical fiber and the transmission belt 4, thereby being able to control the speed of the optical fiber going down the well. When the optical fiber breaks and falls rapidly, the pushing mechanism can automatically push the movable plate 6 and the transmission wheel 5 to the left to clamp the optical fiber and prevent the lower optical fiber from falling into the wellbore.

[0023] The above-mentioned distributed logging optical fiber wellhead suspension device can be further optimized and / or improved according to actual needs: Embodiment 2: As attached Figure 1-6 As shown, the pushing mechanism includes 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 braking mechanism. A fixed plate 9 is provided on the right side of the movable plate 6, and two push rod cylinders 8 are provided at intervals on the left side of the fixed plate 9. A push rod 7 with the right end located in the push rod cylinder 8 is provided on the right side of the movable plate 6 corresponding to each push rod cylinder 8 position. A plurality of force storage spring cylinders 11 are provided on the left side of the fixed plate 9. The force storage spring cylinder 11 is provided with a force storage spring 10, and the force storage spring 10 is installed in the force storage spring cylinder 11. 0A power storage wheel 12 is installed on the left side, a control rod 13 is provided between the fixed plate 9 and the movable plate 6, the left end of the power storage wheel 12 is against the right side of the control rod 13, and a through hole 15 is provided on the control rod 13 corresponding to the lower position of each power storage wheel 12, the upper part of the control rod 13 is connected to the front end of the excitation rod 14 through a connecting pin 16, the front part of the excitation rod 14 is connected to the rear part of the fixed plate 9 through a fixing pin 17, and a brake mechanism capable of pushing the left part of the excitation rod 14 to lift up is provided on the left side of the excitation rod 14.

[0024] During use, when the optical fiber falls normally, the force storage wheel 12 presses on the control rod 13 to compress the force storage spring 10. When the ground optical fiber breaks, the braking mechanism is actuated to lift the left part of the excitation rod 14 and press the right part of the excitation rod 14 downward, thereby driving the control rod 13 downward. 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 presses on the right side of the movable plate 6. Under the restoring force of the force storage spring 10, the movable plate 6 is pushed to the left, thereby clamping the optical fiber to prevent it from falling into the wellbore.

[0025] Embodiment 3: As attached Figure 1-2 As shown, the braking mechanism includes an excitation spring tube 18, an excitation spring 19, and an excitation hammer 20. The rear end of the rotating shaft of the uppermost transmission wheel 5 in the right clamping part is connected to the excitation spring tube 18. The excitation spring tube 18 opens downward, and an excitation spring 19 is installed in the excitation spring tube 18. The excitation hammer 20 is installed at the lower end of the excitation spring 19.

[0026] When the optical fiber is lowered, the transmission wheel 5 is driven to rotate by friction force, the transmission wheel 5 drives the rotating shaft to rotate, the rotating shaft drives the excitation spring tube 18 to rotate, the spring inside the excitation spring tube 18 is connected to the excitation hammer 20, the faster the rotation speed, the longer the part of the excitation hammer 20 extending out of the excitation spring tube 18, when the optical fiber breaks and falls rapidly and the length reaches a certain value, the excitation hammer 20 will hit the excitation rod 14, pushing the left part of the excitation rod 14 to lift up, thereby pressing the control rod 13 on the right side, so that the power storage wheel 12 passes through the control rod 13 and pushes the movable plate 6 to move to the left to clamp the optical fiber.

[0027] Embodiment 4: As attached Figure 1-2 As shown, it also includes a suspension shaft 21 and a clockwork box 22. The suspension shaft 21 arranged in the front-to-back direction is installed on the inner side of the upper part of the frame 1. The clockwork box 22 and the winding block 23 are arranged on the suspension shaft 21 at intervals in the front and back. The clockwork box 22 is transmission-connected to the suspension shaft 21. The upper end of the control rod 13 can clamp the clockwork spring in the clockwork box 22. The middle part of the winding block 23 is provided with a through hole 24 that passes through from top to bottom.

[0028] When in use, the optical fiber passes through the through hole 24 and then passes between the left clamping part and the right clamping part. The clockwork box 22 accumulates energy in the initial state and is locked by the clockwork spring at the upper end of the control rod 13. When the braking mechanism is actuated to cause the control rod 13 to fall, the clockwork spring is unlocked, thereby releasing energy, driving the suspension shaft 21 and the winding block 23 to rotate, and the optical fiber is wound by the winding block 23, thereby preventing the optical fiber from falling into the wellbore.

[0029] Embodiment 5: As attached Figure 2 As shown, a ratchet mechanism 25 is also included, and the front end and the rear end of the suspension shaft 21 are both provided with a ratchet mechanism 25 .

[0030] The ratchet mechanism 25 is provided to prevent the suspension shaft 21 from rotating in reverse.

[0031] Embodiment 6: As attached Figure 1-2 As shown, the adjustment mechanism includes a driving gear 26, a driven gear 27, a screw 28, an adjusting knob 29, and a sliding nut 30. The driving gear 26 is installed in the middle of the left side of the beam 2. The front and rear sides of the driving gear 26 are both drivingly connected to the driven gears 27. The driven gear 27 is installed on the beam 2. The middle part of each driven gear 27 is drivingly connected to the screw 28. The right end of the screw 28 passes through the beam 2 and the fixed 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 fixed plate 9. The front side of the driving gear 26 is drivingly connected to the adjusting knob 29. The left part of the adjusting knob 29 is installed on the frame 1 through a sliding bearing 31, and the left end of the adjusting knob 29 is located outside the frame 1.

[0032] By turning the adjusting knob 29, the driving gear 26 is driven to rotate, the driving gear 26 drives the driven gear 27 to rotate, and the driven gear 27 drives the screw 28 to rotate, so that the sliding nut 30 moves to the left, thereby driving the pushing mechanism and the right pressing part to move to the left, adjusting the friction between the optical fiber and the transmission belt 4, thereby adjusting the lowering speed of the optical fiber.

[0033] Embodiment 7: As attached Figure 1 , 2 As shown in Figures 5 and 6, the pushing mechanism also includes a limiting cylinder 32. A limiting cylinder 32 is installed on the left side of the fixed plate 9 outside each force storage spring cylinder 11. A limiting hole 33 is provided on the left side of the limiting cylinder 32, which passes through the limiting hole 33 from top to bottom. The lower part of the control rod 13 passes through the limiting hole 33. A connecting hole 34 is provided on the middle part of the left side of the limiting cylinder 32, which passes through the left and right sides.

[0034] By setting the limiting cylinder 32, the control rod 13 can be inserted into the limiting hole 33, the distance between the control rod 13 and the fixed plate 9 is maintained, and the moving direction of the control rod 13 can be limited. When the right part 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.

[0035] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A distributed logging optical fiber wellhead suspension device, characterized in that It includes a frame, a beam, a clamping mechanism, an adjusting mechanism, and a pushing mechanism. An installation cavity that passes through from top to bottom is provided in the middle of the frame. A beam arranged in the front-to-back direction is installed on the left inner side of the frame. A clamping mechanism is provided on the right side of the beam. The clamping mechanism includes a left clamping part and a right clamping part. The right clamping part includes a transmission belt, a transmission wheel and a movable plate. A plurality of transmission wheels are installed at intervals on the left side of the movable plate. A transmission belt connected end to end is covered between the transmission wheel located at the uppermost end and the transmission wheel located at the lowermost end. The left clamping part has the same structure as the right clamping part and is symmetrically distributed on the left and right sides. The left side of the left clamping part is installed together with the right side of the beam. A pushing mechanism that can push the movable plate to move to the left is provided 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 provided on the beam.

2. The distributed logging optical fiber wellhead suspension device according to claim 1 is characterized in that The pushing mechanism includes a push rod, a push rod cylinder, a fixed plate, a force storage spring, a force storage spring cylinder, a force storage wheel, a control rod, an excitation rod and a braking mechanism. A fixed plate is provided on the right side of the movable plate, and two push rod cylinders are provided at intervals on the upper and lower left sides of the fixed plate. A push rod with the right end located in the push rod cylinder is provided on the right side of the movable plate corresponding to the position of each push rod cylinder, a plurality of force storage spring cylinders are provided on the left side of the fixed plate, and a force storage wheel is installed in the force storage spring cylinder. A control rod is provided between the fixed plate and the movable plate, and the left end of the force storage wheel is abutted against the right side of the control rod. A through hole that passes through the left and right sides is provided on the control rod corresponding to the position below each force storage wheel. The upper part of the control rod is connected to the front end of the excitation rod by a connecting pin, and the front part of the excitation rod is connected to the rear part of the fixed plate by a fixing pin. A braking mechanism that can push the left part of the excitation rod to lift up is provided on the left side of the excitation rod.

3. The distributed logging optical fiber wellhead suspension device according to claim 2 is characterized in that The braking mechanism includes an excitation spring cylinder, an excitation spring, and an excitation hammer. The rear end of the rotating shaft of the uppermost transmission wheel in the right clamping part is connected to the excitation spring cylinder. The opening of the excitation spring cylinder is downward, and an excitation spring is installed in the excitation spring cylinder. The lower end of the excitation spring is installed with an excitation hammer.

4. The distributed logging optical fiber wellhead suspension device according to claim 2 or 3, characterized in that The machine also includes a suspension shaft and a clockwork box. A suspension shaft arranged in the front-to-back direction is installed on the inner side of the upper part of the frame. A clockwork box and a winding block are arranged on the suspension shaft at intervals in the front and back. The clockwork box is connected to the suspension shaft in a transmission manner. The upper end of the control rod can clamp the clockwork spring in the clockwork box. A through hole is provided in the middle of the winding block, which passes through the winding block from top to bottom.

5. The distributed logging optical fiber wellhead suspension device according to claim 4 is characterized in that It also includes a ratchet mechanism, and the front end and the rear end of the suspension shaft are both provided with the ratchet mechanism.

6. The distributed logging optical fiber wellhead suspension device according to claim 2, 3 or 5, characterized in that The adjusting mechanism includes a driving gear, a driven gear, a screw, an adjusting knob and a sliding nut. A driving gear is installed in the middle of the left side of the beam. The front and rear sides of the driving gear are both connected to the driven gears by transmission. The driven gear is installed on the beam. The middle part of each driven gear is connected to the screw. The right end of the screw passes through the beam and the fixed plate in turn and is rotatably installed with the frame. A sliding nut is installed on each screw corresponding to the right side of the fixed plate. The front side of the driving gear is connected to the adjusting knob by transmission. The left part of the adjusting knob is installed on the frame through a sliding bearing, and the left end of the adjusting knob is located outside the frame.

7. The distributed logging optical fiber wellhead suspension device according to claim 4 is characterized in that The adjusting mechanism includes a driving gear, a driven gear, a screw, an adjusting knob and a sliding nut. A driving gear is installed in the middle of the left side of the beam. The front and rear sides of the driving gear are both connected to the driven gears by transmission. The driven gear is installed on the beam. The middle part of each driven gear is connected to the screw. The right end of the screw passes through the beam and the fixed plate in turn and is rotatably installed with the frame. A sliding nut is installed on each screw corresponding to the right side of the fixed plate. The front side of the driving gear is connected to the adjusting knob by transmission. The left part of the adjusting knob is installed on the frame through a sliding bearing, and the left end of the adjusting knob is located outside the frame.

8. The distributed logging optical fiber wellhead suspension device according to claim 2, 3, 5 or 7, characterized in that The pushing mechanism also includes a limit cylinder. A limit cylinder is installed on the left side of the fixed plate outside each force storage spring cylinder. A limit hole is provided on the left side of the limit cylinder, which passes through the limit hole. The lower part of the control rod passes through the limit hole. A connecting hole is provided on the middle part of the left side of the limit cylinder, which passes through the left and right sides.

9. The distributed logging optical fiber wellhead suspension device according to claim 4, characterized in that The pushing mechanism also includes a limit cylinder. A limit cylinder is installed on the left side of the fixed plate outside each force storage spring cylinder. A limit hole is provided on the left side of the limit cylinder, which passes through the limit hole. The lower part of the control rod passes through the limit hole. A connecting hole is provided on the middle part of the left side of the limit cylinder, which passes through the left and right sides.

10. The distributed logging optical fiber wellhead suspension device according to claim 6, characterized in that The pushing mechanism also includes a limit cylinder. A limit cylinder is installed on the left side of the fixed plate outside each force storage spring cylinder. A limit hole is provided on the left side of the limit cylinder, which passes through the limit hole. The lower part of the control rod passes through the limit hole. A connecting hole is provided on the middle part of the left side of the limit cylinder, which passes through the left and right sides.

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