Anti-slip safety device for pipe pulling of anti-well drilling pipeline

Abstract

The utility model relates to the field of drilling, specifically is a kind of anti-well drilling pipeline pipe sliding anti-skid safety device, wherein anti-well drilling pipeline pipe sliding anti-skid safety device, including the base being located in the outer periphery of pipeline, multiple holding devices are symmetrically arranged on the base along pipeline center, the holding device includes pressure rod, push rod and holding piece being arranged along the axial direction of pipeline, the outer end of pressure rod is hinged with push rod through first pin shaft, middle section is hinged with base through second pin shaft, inner end is hinged with holding piece through third pin shaft.The utility model structure is extremely simple, and operation method is simple, safe and reliable, and it is easy to operate, and it is mechanically anti-skid self-locking, unlocking is convenient, effectively solves the problem of pipeline sliding caused by the failure of pipe clamp unit, and the utility model is especially suitable for the pipeline pipe sliding operation of the pipeline with a weight of more than 300 tons.

Description

Technical Field

[0001] This utility model relates to the field of drilling, specifically to a safety device for anti-slip of the riser drilling pipe chute. Background Technology

[0002] Traditional drilling is done "from top to bottom," while the core of reverse drilling is "bottom-up" or "pilot-then-expand." When reverse drilling is used for pipeline installation on steep mountain slopes, a large vertical or inclined pipeline needs to be installed between the mountaintop (entry point) and the foot of the mountain (exit point). When installing the large pipeline, prefabricated pipeline sections (usually HDPE pipe, steel pipe, or fiberglass pipe) are typically laid down in sections at the mountaintop and connected one by one in the well using a "top-down" method, utilizing the pipeline's own weight to smoothly lower it into the well.

[0003] During pipeline lowering, winches and wire ropes are typically used for traction. However, due to the long length of the inclined shaft in a reverse drilling operation and the heavy weight of the pipeline (over 300 tons), the traction force of ordinary winches on the market is insufficient to meet the traction requirements, which can easily lead to the pipeline falling directly into the inclined shaft.

[0004] CN21742895U discloses a traction device for reverse drilling pipeline construction, which uses two winches in conjunction with fixed pulleys and a clamping support to clamp and position the pipeline after it has been slid into place. However, due to the limitation of the winch traction force, it is difficult to apply to the sliding operation of large pipelines, and safety hazards still exist.

[0005] CN221424088U discloses a segmented gear and rack driven pipe pusher, which is suitable for direct pipe laying and crossing construction under steep slope conditions. It fixes the pipe on the base track through a fixed clamp unit to prevent the pipe from slipping. However, if the fixed clamp unit (mechanical clamp) fails, the pipe will slide directly into the hole, causing a serious engineering accident.

[0006] Therefore, technicians hope to effectively solve the problem of pipe slippage caused by the failure of the fixed clamp unit of the pipe pusher when installing large pipes using reverse drilling. Summary of the Invention

[0007] The purpose of this utility model is to solve the above-mentioned technical problems and provide a reverse drilling pipeline anti-slip safety device with an extremely simple structure, safety and reliability, easy operation, mechanical anti-slip self-locking, convenient unlocking, and effective solution to the problem of pipeline slippage caused by the failure of the fixed clamp unit.

[0008] The device of this utility model includes a base disposed on the outer periphery of the pipe. Multiple clamping devices are symmetrically arranged on the base along the center of the pipe. Each clamping device includes a pressure rod, a push rod arranged along the axial direction of the pipe, and a clamping plate. The outer end of the pressure rod is hinged to the push rod via a first pin, the middle section is hinged to the base via a second pin, and the inner end is hinged to the clamping plate via a third pin.

[0009] The push rod is located in at least one guide sleeve, which is fixed to the base.

[0010] The push rod is equipped with a spring seat, and a support spring is fitted on the push rod between the spring seat and the guide sleeve behind it.

[0011] The base is equipped with a fixing plate, and the middle section of the pressure rod is hinged to the fixing plate via a second pin.

[0012] The clamping piece is arc-shaped.

[0013] The clamping device includes a push rod and multiple pressure rods arranged along the axial direction of the push rod. The outer ends of the multiple pressure rods are respectively hinged to the same push rod via a first pin, and the inner ends of two or three adjacent pressure rods are respectively hinged to the same clamping plate via a third pin.

[0014] The distance h1 between the second pin and the clamping plate is greater than the minimum distance h2 between the second pin and the outer wall of the pipe.

[0015] A fixing seat corresponding to the push rod of the plurality of clamping devices is installed at the reverse drilling wellhead used for pipe chutes.

[0016] The fixing seat is a ring-shaped fixing seat.

[0017] The anti-slip method for the reverse drilling pipeline chute is as follows: First, the aforementioned anti-slip safety device for the reverse drilling pipeline chute is fitted onto the pipeline. Part of the clamping plate contacts the outer wall of the pipeline under gravity and can move with the pipeline as it chutes downwards. During normal chutes, the pipeline is pushed by a pipe pusher. After being pushed into position, the mechanical clamp of the pipe pusher clamps the pipeline to prevent it from slipping. When the mechanical clamp malfunctions and cannot clamp the pipeline, the pipeline will slide towards the reverse drilling wellhead under gravity. At this time, the anti-slip safety device for the reverse drilling pipeline chute will also descend synchronously with the pipeline until the front end of the push rod abuts against the fixed seat at the reverse drilling wellhead. The push rod stops descending, and the clamping plate is driven downwards by the inertia of the pipeline's outer wall. This causes the pressure rod to rotate around the second pin, causing the clamping plates of multiple clamping devices to be driven synchronously towards the center of the pipeline by the inner end of the pressure rod until the pipeline is completely clamped to prevent it from continuing to slide down, thus achieving self-locking.

[0018] When unlocking is required, use the pipe pusher to move the pipe upwards, releasing the downward force of the pipe, and the clamping plate will loosen outwards to unlock it.

[0019] Beneficial effects: By symmetrically arranging multiple clamping devices along the center of the pipeline on the base, the push rod and the fixed seat at the wellhead form a matching limiting mechanism during pipe chuting. At the same time, using the lever principle, the pressure rod rotates around the second pin. The clamping plates of the multiple clamping devices are driven by the inner end of the pressure rod to tighten synchronously towards the center of the pipeline until the pipeline is completely clamped. This purely mechanical anti-slip structure plays a role similar to a "wedge block". After self-locking, the pipeline can no longer slide downwards, and the greater the downward force of the pipeline, the greater the clamping force of the clamping device. It has high anti-slip safety and good reliability.

[0020] A guide sleeve is installed on the base to guide the displacement of the push rod, preventing deformation of the push rod or uneven force transmission, which would affect the clamping force. One or more guide sleeves can be used, as needed. A support spring is installed between the spring seat of the push rod and the guide sleeve. In case of failure, this spring can reduce the impact force when the push rod hits the fixed seat as the pipe slides down, limit the stroke of the push rod, prevent damage to the guide sleeve, and provide a certain support force. It also makes it easier to pull the pipe out of the device during unlocking.

[0021] In this utility model, the outer ends of multiple pressure rods in a single clamping device can be connected to a push rod to maintain synchronous action. The inner ends of two or three pressure rods are connected to the same clamping plate to ensure sufficient rigidity and provide force transmission. Multiple clamping plates can form multiple clamping forces along the radial direction of the pipe to ensure the locking effect.

[0022] This utility model has an extremely simple structure, is easy to operate, safe and reliable, and can be mechanically anti-slip and self-locking. It is easy to unlock and effectively solves the problem of pipe slippage caused by the failure of the fixed clamp unit. The anti-slip method of this utility model is particularly suitable for pipe chuting operations with a self-weight of more than 300 tons. Attached Figure Description

[0023] Figure 1 This is a diagram showing the unlocked state of the device of this utility model.

[0024] Figure 2 This is a diagram showing the locking state of the device of this utility model.

[0025] Figure 3 for Figure 1 A cross-sectional view.

[0026] Figure 4 This is a diagram showing the usage state of the device of this utility model.

[0027] Among them, 1-base, 2-pressure rod, 3-push rod, 4-clamping plate, 5-guide sleeve, 6-spring seat, 7-support spring, 8-fixed plate, 9-first pin, 10-second pin, 11-third pin, 13-fixed seat, 14-pipe, 15-pipe pusher, 15.1-mechanical clamp. Detailed Implementation

[0028] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] See Figure 1 and Figure 3 The present invention includes a base 1 disposed on the outer periphery of a pipe. Multiple clamping devices (four in this embodiment) are symmetrically arranged on the base 1 along the center of the pipe. Each clamping device includes a pressure rod 2, a push rod 3 arranged axially along the pipe, and a clamping plate 4. The outer end of the pressure rod is hinged to the push rod 3 via a first pin 9, the middle section is hinged to a fixing plate 8 on the base 1 via a second pin 10, and the inner end is hinged to the clamping plate 3 via a third pin 11. The push rod 3 is located in at least one guide sleeve 5, which is fixed to the base 1. The number of guide sleeves 5 can be reasonably arranged according to the length and stroke requirements of the push rod 3. In this embodiment, three guide sleeves 5 are spaced apart along the length of the push rod. Furthermore, the clamping plate 3 is an arc-shaped plate with the same curvature as the corresponding local outer wall of the pipe to ensure maximum contact with the pipe wall during clamping, increasing the contact area and improving reliability. The distance h1 between the second pin and the clamping plate is greater than the minimum distance h2 between the second pin and the outer wall of the pipe. The front end of the push rod 3 is provided with a spring seat 6, and a support spring 7 is fitted on the push rod 3 between the spring seat 6 and the frontmost guide sleeve 5.

[0031] As another variation, the spring seat 6 may not be located at the front end of the push rod 3, but at any position of the push rod 3, with the support spring 7 fitted onto the push rod between the spring seat 6 and the rear guide sleeve. One of the two installation positions of the support spring 7 can be chosen, or both can be arranged simultaneously.

[0032] As another preferred embodiment: a single clamping device includes a push rod 3 and multiple pressure rods 2 arranged axially along the push rod 3. The outer ends of the multiple pressure rods 2 are respectively hinged to the same push rod 3 via a first pin 9, and the inner ends of two or three adjacent pressure rods 2 are respectively hinged to the same clamping plate 4 via a third pin 11. See [reference needed] Figure 1 As can be seen in this embodiment, the inner ends of two adjacent pressure rods 4 are respectively hinged to the same clamping plate 4 via the third pin 11. In this way, two clamping plates 4 are arranged along the length of the pipe, which not only improves the locking force of a single clamping plate 4, but also improves the local clamping force in the same direction.

[0033] As a limiting device, if the wellhead size is sufficient, the push rod 3 can be directly limited by the wellhead. Alternatively, preferably, a fixing seat 13 corresponding to the push rod 3 of the plurality of clamping devices can be installed at the reverse drilling wellhead used for pipe chute. The fixing seat 13 is an annular fixing seat.

[0034] Working principle: See [link / description] for the non-locking state. Figure 1 The anti-slip safety device for the reverse drilling pipeline is first fitted onto the pipeline 14. The upper clamping plate 4 is in contact with the outer wall of the pipeline 14 due to gravity (not clamped) and is in a hanging state. When the pipeline is slid downward, it can move together with the pipeline 14. The support spring 7 is in an uncompressed state.

[0035] When pipe slippage occurs and reaches the wellhead, see [reference needed]. Figure 2 Due to the limiting effect of the fixed seat 13, the push rod 3 is stopped against the fixed seat 13, and the support spring 7 is compressed to reduce the impact. The push rod 3 stops moving downward, causing the pressure rod 2 and the clamping plate 4 to stop moving downward with the pipe 14. Due to the friction between the pipe 14 and the clamping plate 4, the clamping plate 4 will move downward under inertia, causing the pressure rod 2 to rotate around the second pin 10. Finally, as the multiple clamping plates move downward, they are also driven by the inner end of the pressure rod to tighten synchronously towards the center of the pipe 14 until the pipe 14 is completely clamped and prevented from continuing to slide down. The greater the downward force on the pipe 14, the greater the clamping force of the clamping device. Therefore, the pipe can be automatically locked to prevent the pipe from sliding into the well and causing safety accidents.

[0036] When unlocking, other auxiliary equipment (such as the pipe pusher 15) is needed to move the pipe 14 upward (backward) to release the downward force of the pipe 14, and then the clamping plate 4 will loosen outward and can be easily unlocked.

[0037] See Figure 4 The anti-slip method for reverse drilling pipeline chutes is as follows: First, the aforementioned anti-slip safety device for reverse drilling pipeline chutes is fitted onto the pipeline 14 (located behind the mechanical clamp 15.1 of the pusher 15). The upper clamping plate 4 is attached to the outer wall of the pipeline 14 by gravity and can move with the pipeline 14 during downward chutes. During normal chutes, the pusher 15 holds and pushes the pipeline. After pushing it to the correct position, the mechanical clamp 15-1 of the pusher 15 clamps the pipeline 14 to prevent chutes from slipping. The pusher 15 releases the pipeline 14 and returns to the starting position before holding and pushing the pipeline again. At the same time, the mechanical clamp releases the pipeline 14. This process is repeated alternately to complete the chutes operation. When the pusher 15 retracts, the anti-slip safety device for reverse drilling pipeline chutes is also simultaneously pulled by the traction equipment. Pull back up to the starting position; when the mechanical clamp malfunctions and cannot grip the pipe 14, the pipe 14 will slide towards the reverse drilling wellhead due to gravity. At this time, the reverse drilling pipe chute anti-slip safety device will also descend synchronously with the pipe 14 until the front end of the push rod 3 abuts against the fixed seat 13 at the reverse drilling wellhead. The push rod 3 stops descending, and the clamping plate 4 is driven downward by the inertia of the outer wall of the pipe 14, causing the pressure rod 2 to rotate around the second pin 10. This causes the clamping plates 4 of multiple clamping devices to be driven synchronously towards the center of the pipe 14 by the inner end of the pressure rod 2, until the pipe is completely gripped and the pipe 14 is prevented from continuing to slide down, achieving the purpose of self-locking. When unlocking is required, the pipe pusher 15 is used to move the pipe upward, causing the pressure rod 2 to rotate in the opposite direction and drive the clamping plate 4 to loosen, thus unlocking the pipe.

[0038] This utility model of tube pusher can use commercially available common models, or the segmented gear and rack driven tube pusher disclosed in the patent document with application number CN202323435894.0, whose fixed clamp unit is equivalent to a mechanical clamp.

Claims

1. A safety device for preventing slippage in a raised drilling pipeline, characterized in that, The device includes a base located on the outer periphery of the pipe, on which multiple clamping devices are symmetrically arranged along the center of the pipe. Each clamping device includes a pressure rod, a push rod arranged along the axial direction of the pipe, and a clamping plate. The outer end of the pressure rod is hinged to the push rod via a first pin, the middle section is hinged to the base via a second pin, and the inner end is hinged to the clamping plate via a third pin.

2. The anti-slip safety device for the riser pipe chute as described in claim 1, characterized in that, The push rod is located in at least one guide sleeve, which is fixed to the base.

3. The anti-slip safety device for the riser pipe chute as described in claim 2, characterized in that, The push rod is equipped with a spring seat, and a support spring is fitted on the push rod between the spring seat and the guide sleeve behind it.

4. The anti-slip safety device for the riser pipe chute as described in claim 1, characterized in that, The base is equipped with a fixing plate, and the middle section of the pressure rod is hinged to the fixing plate via a second pin.

5. The anti-slip safety device for the riser pipe chute as described in claim 1, characterized in that, The clamping piece is arc-shaped.

6. The anti-slip safety device for the riser pipe chute as described in claim 1, characterized in that, The clamping device includes a push rod and multiple pressure rods arranged along the axial direction of the push rod. The outer ends of the multiple pressure rods are respectively hinged to the same push rod via a first pin, and the inner ends of two or three adjacent pressure rods are respectively hinged to the same clamping plate via a third pin.

7. The anti-slip safety device for the riser drilling pipeline chute as described in claim 1, characterized in that, The distance h1 between the second pin and the clamping plate is greater than the minimum distance h2 between the second pin and the outer wall of the pipe.

8. The anti-slip safety device for the riser pipe chute as described in any one of claims 1-7, characterized in that, A fixing seat corresponding to the push rod of the plurality of clamping devices is installed at the reverse drilling wellhead used for pipe chutes.

9. The anti-slip safety device for the riser pipe chute as described in claim 8, characterized in that, The fixing seat is a ring-shaped fixing seat.

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