A rig floor automatic rope blocking device

Abstract

The utility model relates to the field of petroleum and natural gas drilling equipment, and specifically relates to a rig floor automatic rope stopping device. The rig floor automatic rope stopping device, including the rope stopping subassembly, at least one end of rope stopping subassembly connects the contraction rope stopping mechanism, the contraction rope stopping mechanism includes the support and at least one group of pulley contraction subassembly and pulley buffer subassembly in the support, the pulley of pulley contraction subassembly and pulley buffer subassembly is opposite, staggered arrangement, the end of rope stopping subassembly passes through the pulley fixed in the support rear end on pulley contraction subassembly and pulley buffer subassembly's pulley in proper order, pulley contraction subassembly connects the drive arrangement, and pulley buffer subassembly is fixed on the support. The utility model is simple in structure, can effectively replace manual work, save time and labour, and is safe and reliable.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas drilling equipment, specifically an automatic rope-stopping device for drilling rigs. Background Technology

[0002] In drilling operations, the safe and efficient transfer of drill strings from the surface to the drilling platform is a crucial logistical link that ensures the smooth operation of the entire process. The quality of this operation directly affects work efficiency, equipment integrity, and on-site safety. An improper transfer operation may result in drill string damage, thread deformation, or personal injury, leading to a chain reaction of unplanned downtime and increased maintenance costs.

[0003] Currently, routine drilling operations on-site mainly utilize pneumatic winches or powered catwalks for hoisting and transporting drill strings. The typical operating procedure is as follows: Operators first check the integrity of the slings or chucks; then, they activate the hoisting equipment to lift the drill string over the drilling platform, where it naturally swings towards the wellhead under gravity; to control the drill string's swing trajectory, operators attach a special guide rope to the gate slope and manually pull it to cushion the impact of the swing, ultimately guiding the drill string smoothly to the designated working position.

[0004] However, the current method of limiting drill string sway by manually pulling the stop rope presents significant safety hazards. Throughout the guidance process, operators must maintain close proximity to the stop rope, remaining within the trajectory of the swaying drill string. When the drill string's swaying inertia becomes excessive, the lifting point suddenly fails, or the knot unexpectedly comes undone, uncontrolled swaying of the drill string and rope rebound can easily occur, potentially causing serious injuries to workers, such as being struck, impacted, or crushed. Furthermore, the effectiveness of the stop rope operation relies entirely on the operator's experience, judgment, and immediate reaction, lacking standardized control methods and inherent safety protections, resulting in considerable uncertainty.

[0005] CN202010462162.2 discloses a casing rope-blocking control device, including a positioning seat. The positioning seat includes a base plate, and a pair of side plates are provided on the base plate. A rotating shaft is provided at the first end of each side plate. A gap is maintained between the rotating shaft and the base plate for the rope-blocking to pass through. The device also includes a handle vertically mounted on the rotating shaft. A positioning frame is provided on the side of the handle facing the base plate, and a roller for pressing against the rope-blocking. This solution controls the rope-blocking through the handle and rollers, avoiding direct contact with the heavy casing by personnel. However, it is essentially still a manual operation and lacks buffering and centering functions, resulting in low safety and reliability. It is not suitable for the connection and ejection operations of heavy, large-size, and large-oscillation drill bits. Summary of the Invention

[0006] The purpose of this utility model is to solve the above-mentioned technical problems and provide an automatic rope-stopping device for drilling platforms that is simple in structure, can effectively replace manual labor, saves time and effort, has good safety and reliability, and is suitable for heavy, large-size, and large-oscillation drilling tools.

[0007] This utility model relates to an automatic rope-blocking device for drilling rigs, comprising a rope-blocking assembly. At least one end of the rope-blocking assembly is connected to a retractable rope-blocking mechanism. The retractable rope-blocking mechanism includes a support frame and at least one set of pulley retraction assemblies and pulley buffer assemblies located within the support frame. The pulleys of the pulley retraction assemblies and pulley buffer assemblies are arranged opposite to each other and staggered. The end of the rope-blocking assembly passes sequentially through the pulleys on the pulley retraction assemblies and pulley buffer assemblies and is fixed to the rear end of the support frame. The pulley retraction assemblies are connected to a drive device, and the pulley buffer assemblies are fixed to the support frame.

[0008] The pulley retraction assembly includes a telescopic rod, the front end of which is connected to a telescopic pulley via a telescopic pulley bracket, and the rear end of which is connected to a drive device.

[0009] The pulley buffer assembly includes a guide cylinder and a buffer rod. The rear section of the buffer rod is inserted into the guide cylinder, and the front section is fitted with a buffer spring. The front end of the buffer rod is connected to the buffer pulley via a buffer pulley bracket, and the rear end of the guide cylinder is mounted on the bracket.

[0010] The driving device is a pneumatic cylinder or a hydraulic cylinder.

[0011] The rope-blocking assembly consists of a sleeve clamp assembly and rope-blocking components connecting both ends of the sleeve clamp assembly. The sleeve clamp assembly includes a sleeve clamp connector, arc-shaped sleeve clamps hinged to both ends of the sleeve clamp connector, and clamps connecting the arc-shaped sleeve clamps to the corresponding rope-blocking components.

[0012] At least one pair of arc-shaped elastic steel sheets are symmetrically arranged on both sides of the working surface of the card holder.

[0013] The outer shell of the bracket is an arc-shaped column structure with an inner arc surface and an outer arc surface, and the pulley retraction assembly and pulley buffer assembly are evenly arranged along the center of the arc surface.

[0014] The support has upper and lower layers, with the pulley retraction assembly and pulley buffer assembly located on the upper layer and the drive device located on the lower layer.

[0015] The end of the rope-blocking assembly passes through the dead rope fixing frame and is clamped by the dead rope clamp plate, and is tightened by the set screw. The dead rope fixing frame is connected to the bracket.

[0016] The front end of the bracket is provided with a rope guide hole for inserting the rope guide assembly.

[0017] The drilling tool connection method of this utility model uses the automatic rope-blocking device of the drilling platform installed at the gantry to perform the following drilling connection operations: Step A1 Connecting the Card: When the drill string is lifted to near the front of the drill platform using the lifting device, the control drive device drives the extension rod of the corresponding pulley retraction assembly to extend. At this time, all extension rods are at their maximum extension and the rope retaining assembly is in a tensioned state. Step A2 Buffer Clamp: As the drill string continues to be lifted and removed from the drill platform, it swings under gravity to the clamp assembly where it is caught. Due to the impact, the guide rope is instantly tightened. The taut guide rope acts on the pulley buffer assembly, and the tension of the guide rope is converted into the thrust of the buffer pulley. The buffer spring is compressed, thereby reducing the impact of the drill string hitting the guide rope assembly. When the swinging drill string is caught by the clamp assembly and placed in the clamp, the control drive device drives at least one telescopic rod part to retract, so that the guide rope part is relaxed. The relaxation amount is such that the two arc-shaped clamps in the clamp assembly can be correspondingly fastened to the drill string, realizing secondary shock absorption and preventing the drill string from rebounding upon impact. Step A3 Retraction: After the drill string is received and stabilized by the sleeving assembly without swaying, the extension rod of the pulley retraction assembly controlled by the drive device continues to retract, so that the retaining rope is gradually loosened until the drill string swings to the wellhead position by gravity. Step A4 Retrieval: After the drill string is positioned at the wellhead and stabilized, the drive device controls the extension rod of the pulley retraction assembly to further retract, causing the retaining rope to continue to loosen until the two arc-shaped sleeves in the sleeve assembly are released and detach from the drill string, completing the drill string connection process.

[0018] The drilling rig throwing method of this utility model uses the automatic rope-stopping device of the drilling rig installed at the gantry post to perform the following drilling throwing operations: Step B1: The drive unit controls the retraction rod of the pulley retraction assembly to retract, so that the retaining rope is completely relaxed. The operator then puts the two arc-shaped clamps of the clamp assembly onto the drill bit and fastens them. Step B2 Buffer: Use the lifting device to lift the drill string, while controlling the extension rod to extend so that the rope retainer is tightened so that the ferrule assembly can maintain the engagement with the drill string, thus maintaining the limit and buffering of the drill string; Step B3 Lowering: After the lifting device moves the drill string to the gantry position, it lowers the drill string. At the same time, the linear cylinder controls the telescopic rod to extend further, and the retaining rope is gradually tightened and straightened as the drill string moves. Step B4 Unlocking: As the hoisting device continues to lower the drill string, the locked chuck assembly is opened and separated from the drill string due to the continuous straightening of the guide ropes on both sides and the weight of the drill string. The hoisting device then lowers the drill string to the ground, completing the ejection process.

[0019] Beneficial effects: 1) This utility model designs a combined structure of "pulley retraction assembly + pulley buffer assembly". The pulley retraction assembly is controlled by a drive device to realize the automatic extension and retraction of the rope. With the design of the pulleys being arranged in opposite and staggered positions, the tension of the rope can be precisely controlled, completely replacing the traditional method of manual traction and realizing the automation of the rope blocking operation.

[0020] 2) To address the impact of heavy, large-sized drill bits swinging during drilling, a combination structure of guide cylinder, buffer rod, and buffer spring is incorporated into the pulley buffer assembly. This converts the instantaneous impact force on the guide rope into the compression force of the buffer spring, achieving primary buffering. Simultaneously, the telescopic rod is partially retracted via a drive device, allowing the guide rope to relax appropriately, thus creating secondary shock absorption. Through this dual buffering design of mechanical buffering and tension adjustment buffering, the technical problem of lacking an effective buffering mechanism and being unable to cope with large swinging impacts in existing technologies is solved.

[0021] 3) In the cable retainer assembly, the sleeve clamp is used to receive the drill bit. The hinged arc-shaped sleeve clamp can be correspondingly fastened, and with the cable retainer tension, it can further limit the drill bit and reduce the risk of drill bit rebound. The sleeve clamp has arc-shaped elastic steel plates on both sides of the working face, which can effectively center and adapt to drill bits of different sizes to achieve stable reception. By fastening and loosening the arc-shaped sleeve clamp, and with the change of cable retainer tension, the connection and release of the clamp during the drill bit connection and release process can be completed. No manual assistance is required for positioning, which solves the problems of relying on manual experience, time-consuming and labor-intensive, and poor safety in traditional operation of drill bit positioning.

[0022] 4) The bracket forms an arc-shaped column structure, which can be easily fitted with the circular gantry on the drilling platform for easy installation, removal and positioning; the pulley retraction assembly and pulley buffer assembly are evenly arranged along the center of the arc surface (with the same center as the gantry), and the bracket is divided into upper and lower layers. The upper layer is equipped with the pulley assembly and the lower layer is equipped with the drive device. This layout not only conforms to the trajectory characteristics of the drill bit swing, ensuring that the force on the ropes on both sides is even, but also achieves a compact structure and functional zoning, improving the installation adaptability of the device at the gantry on the drilling platform.

[0023] 5) This utility model device has a compact structure, reasonable layout, high safety and reliability, and can effectively replace manual operation to efficiently realize drill bit receiving and throwing operations. It is suitable for drill bit receiving and throwing operations of heavy weight, large size and large swing drill bit. Attached Figure Description

[0024] Figure 1 This is a diagram showing the usage state of this utility model.

[0025] Figure 2 This is a one-sided isometric view of the device of this utility model.

[0026] Figure 3 This is a front structural diagram of the device of this utility model.

[0027] Figure 4 This is a schematic diagram of the rear structure of the device of this utility model.

[0028] Figure 5 This is a structural schematic diagram of the rope-blocking assembly of this utility model.

[0029] Figure 6 This is a buffer state diagram of the present invention.

[0030] Figure 7 This is a diagram showing the state of the card set of this utility model.

[0031] Figure 8 This is a diagram showing the reverberation state of this utility model.

[0032] Among them, 1-gatepost, 2-retractable rope-blocking mechanism, 3-rope-blocking assembly, 31-rope-blocking, 32-clamping clip, 33-arc-shaped clamp, 34-clamp, 35-arc-shaped elastic steel sheet, 4-pulley retraction assembly, 41-telescopic rod, 42-telescopic pulley bracket, 43-telescopic pulley, 5-pulley buffer assembly, 51-guide cylinder, 52-buffer rod, 53-buffer spring, 54-buffer pulley bracket, 55-buffer pulley, 6-bracket, 61-upper bracket, 62-lower bracket, 63-inner arc surface, 64-outer arc surface, 65-rope-blocking guide hole, 66-front side, 67-rear side, 7-linear cylinder, 8-dead rope fixing bracket, 9-dead rope clamp, 10-drilling tool. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0034] See Figure 1 In this embodiment, the automatic rope-blocking device for the drilling platform includes a rope-blocking assembly 3. At least one end of the rope-blocking assembly 3 is connected to a retractable rope-blocking mechanism 2. Preferably, a retractable rope-blocking mechanism 2 is symmetrically connected to both ends of the rope-blocking assembly 3, and the retractable rope-blocking mechanisms 2 on both sides synchronously control the retraction and extension of the rope-blocking assembly 3.

[0035] See Figure 5The rope-blocking assembly 3 consists of a sleeve clamp assembly and rope-blocking 31 connecting both ends of the sleeve clamp assembly. The sleeve clamp assembly includes a sleeve clamp 32 with an arc-shaped receiving surface (i.e., working surface), arc-shaped sleeve clamps 33 respectively hinged to both ends of the sleeve clamp receiving surface 32, and clamps 34 connecting the arc-shaped sleeve clamps 33 to the corresponding rope-blocking 31. The arc-shaped receiving surface of the sleeve clamp receiving surface 32 is used to receive the drill bit. The arc-shaped sleeve clamps 33 on both sides can be correspondingly fastened under impact force to complete the action of clamping the drill bit. At least one pair of arc-shaped elastic steel plates 35 are symmetrically provided on both sides of the working surface of the sleeve clamp receiving surface 32. In this embodiment, two pairs of arc-shaped elastic steel plates 35 are symmetrically provided to improve the closing centering in the clamping state.

[0036] See Figures 2-4 The retractable rope-blocking mechanism 2 includes a bracket 6 and at least one set of pulley retraction components 4 and pulley buffer components 5 located within the bracket 6. The pulleys of the pulley retraction components 4 and pulley buffer components 5 are arranged opposite to each other and staggered. The end of the rope-blocking component 2 passes through the pulleys on the pulley retraction components 4 and pulley buffer components 5 in sequence and is fixed to the rear end of the bracket 6. The pulley retraction components 4 are connected to a drive device, and the pulley buffer components 5 are fixed to the bracket. The specific number of pulley retraction components 4 and pulley buffer components 5 can be set according to actual needs (such as the tension of the rope-blocking component, the extension and retraction of the pulley retraction components 4, and the buffering amount). In this embodiment, the retractable rope-blocking mechanism 2 has three sets of pulley retraction components 4 and two sets of pulley buffer components 5 arranged alternately in the upper and lower parts.

[0037] The pulley retraction assembly 4 includes a telescopic rod 41. The front end of the telescopic rod 41 is connected to a telescopic pulley 43 via a telescopic pulley bracket 42, and the rear end of the telescopic rod 41 is connected to a drive device. The drive device can be a cylinder, a hydraulic cylinder, or other drive mechanism; in this embodiment, it is a linear cylinder 7. As needed, one set of linear cylinders 7 can control multiple sets of telescopic rods of the pulley retraction assembly 4. As an example, in this embodiment, each set of linear cylinders 7 controls one set of pulley retraction assemblies 4. The piston rod of the linear cylinder 7 is connected to the telescopic rod 41 or can directly act on the telescopic rod 41. Those skilled in the art can design it reasonably according to their needs. The specific control of the drive device is prior art and will not be described in detail.

[0038] The pulley buffer assembly 5 includes a guide cylinder 51 and a buffer rod 52. The rear section of the buffer rod 51 is inserted into the guide cylinder 52, and the front section is fitted with a buffer spring 53. The front end of the buffer rod 52 is connected to the buffer pulley 55 via a buffer pulley bracket 54, and the rear end of the guide cylinder 51 is mounted on a bracket 6.

[0039] The outer shell of the bracket 6 of this utility model can be designed in any shape. However, considering that the installation position of this utility model can cooperate with the gatepost 1, it is preferable that the outer shell of the bracket 6 is also designed as an arc-shaped column structure with an inner arc surface 63 and an outer arc surface 64. This facilitates fitting, limiting, and fixing with the cylindrical gateposts 1 on both sides of the drilling platform, while also being easy to disassemble, offering good flexibility, and further improving work efficiency. When the outer shell of the bracket 6 is an arc-shaped column structure, the pulley retraction assembly 4 and the pulley buffer assembly 5 are evenly arranged along the center of the arc surface.

[0040] To make the structure more compact and the layout more reasonable, the bracket 6 has two layers, upper and lower. The pulley retraction assembly 4 and the pulley buffer assembly 5 are located on the upper bracket 61, and the corresponding linear cylinder 7 is located on the lower bracket 62.

[0041] The front side 66 of the bracket 6 is provided with a rope guide hole 65 for the rope guide 31 of the rope guide assembly 3 to pass through. The end of the rope guide 31 passes through the dead rope fixing frame 8 and is clamped by the dead rope clamp 9 and tightened by a set screw. The dead rope fixing frame 8 is connected to the rear side 67 of the bracket 6. The end of the rope guide 31 on one side of the rope guide assembly 3 first passes through the rope guide hole 65, then passes through the pulleys on the pulley retraction assembly 4 and the pulley buffer assembly 5 in sequence, and then passes through the dead rope fixing frame 8 and is clamped by the dead rope clamp 9 and fixed to the rear side of the bracket 6, ensuring effective fixation of the end of the rope guide 31.

[0042] The retractable rope-blocking mechanism 2 of the automatic rope-blocking device for the drilling platform of this utility model is installed on the cylinders 1 on both sides of the drilling platform, and the rope-blocking assembly 3 is connected between the two retractable rope-blocking mechanisms 2.

[0043] The drilling operation of this utility model device includes: Step A1 Connecting the card: When the drill string 10 is lifted to near the front of the drill platform using the lifting device, the linear cylinder 7 is controlled to drive the extension rod 41 of the corresponding pulley retraction assembly 4 to extend. At this time, all extension rods 41 are at their maximum extension and the rope retaining assembly 3 is in a tensioned state. Step A2 Buffer Sleeve: See Figure 6 As the drill string 10 continues to be lifted and removed from the drilling platform, it swings under gravity to the chuck assembly where it is caught. Due to the impact of the swinging force of the drill string 10, the guide rope 31 is instantly tightened. The taut guide rope 31 acts on the pulley buffer assembly 5, and the tension of the guide rope 31 is converted into a thrust on the buffer pulley 55. The buffer spring 53 is compressed, and the impact of the drill string 10 hitting the guide rope assembly 3 is reduced by the action of the buffer spring 53. After the swinging drill string 10 is caught by the chuck assembly, the control cylinder 7 drives at least one telescopic rod 41 to partially retract, causing the guide rope 31 to partially loosen. The loosening amount is such that the two arc-shaped chucks 33 in the chuck assembly can correspondingly fasten the drill string 10, achieving secondary shock absorption and preventing the drill string 10 from rebounding upon impact. See [link to relevant documentation]. Figure 7 ; Step A3 Retraction: After the drill string 10 is received and stabilized by the sleeve assembly without swaying, the telescopic rod 41 of the pulley retraction assembly 4, controlled by the linear cylinder 7, continues to retract, gradually loosening the retaining rope 31 until the drill string 10 swings to the wellhead position under gravity. See [link to relevant documentation]. Figure 8 ; Step A4: Retrieve the clamped cable: After the drill string 10 is swung to the wellhead and stabilized, the telescopic rod 41 of the pulley retraction assembly 4 is further retracted by the linear cylinder 7, causing the retaining rope 31 to continue to loosen until the two arc-shaped clamps 33 engaged in the clamping assembly are released and detach from the drill string 10, completing the drill string connection process. The operator can then remove the detached clamping assembly and retaining rope 31 together.

[0044] The drilling operation of this utility model device includes: Step B1: The linear cylinder 7 controls the retraction rod 41 of the pulley retraction assembly 4 to retract, so that the rope 31 is completely relaxed. The operator puts the two arc-shaped clips 33 of the clip assembly on the drill bit 10 and fastens them. Step B2 Buffer: Use the lifting device to lift the drill string 10, and at the same time control the extension rod 41 to extend so that the retaining rope 31 is partially tightened so that the sleeve assembly can maintain the engagement state with the drill string, thus maintaining the limit and buffering of the drill string 10. Step B3 Lowering: After the lifting device moves the drill bit 10 to the position of the gate post 1, it lowers the drill bit 10. At the same time, the linear cylinder 7 controls the telescopic rod 41 to extend further. As the drill bit 10 moves, the guide rope 31 is gradually tightened and straightened. Step B4 Unlocking: The lifting device continues to lower the drill string 10. Under the action of the continuously straightening guide ropes on both sides and the weight of the drill string, the locked sleeving assembly is opened, the guide rope assembly 3 separates from the drill string 10, and the lifting device drives the drill string 10 to continue to be lowered to the ground, completing the drill string ejection process.

[0045] The above-mentioned drilling or throwing operations can be performed multiple times. The entire process can be automated with minimal human intervention, saving time and effort, and ensuring high safety and reliability. After the operation is completed, the telescopic rod 41 can be controlled to be at its maximum extension by the linear cylinder 7. The air source and power source are turned off, and the rope-blocking assembly 3 naturally hangs down to the drilling platform due to the air release from the linear cylinder 7.

Claims

1. An automatic rope-stopping device for a drilling rig, comprising a rope-stopping assembly, wherein at least one end of the rope-stopping assembly is connected to a retractable rope-stopping mechanism, characterized in that, The retractable rope-blocking mechanism includes a bracket and at least one set of pulley retraction components and pulley buffer components located in the bracket. The pulleys of the pulley retraction components and pulley buffer components are arranged opposite to each other and staggered. The end of the rope-blocking component passes through the pulleys on the pulley retraction components and pulley buffer components in sequence and is fixed to the rear end of the bracket. The pulley retraction components are connected to a drive device, and the pulley buffer components are fixed to the bracket.

2. The automatic rope-stopping device for drilling rigs as described in claim 1, characterized in that, The pulley retraction assembly includes a telescopic rod, the front end of which is connected to a telescopic pulley via a telescopic pulley bracket, and the rear end of which is connected to a drive device.

3. The automatic rope-stopping device for drilling rigs as described in claim 1 or 2, characterized in that, The pulley buffer assembly includes a guide cylinder and a buffer rod. The rear section of the buffer rod is inserted into the guide cylinder, and the front section is fitted with a buffer spring. The front end of the buffer rod is connected to the buffer pulley via a buffer pulley bracket, and the rear end of the guide cylinder is mounted on the bracket.

4. The automatic rope-stopping device for drilling rigs as described in claim 1 or 2, characterized in that, The driving device is a pneumatic cylinder or a hydraulic cylinder.

5. The automatic rope-stopping device for drilling rigs as described in claim 1 or 2, characterized in that, The rope-blocking assembly consists of a sleeve clamp assembly and rope-blocking components connecting both ends of the sleeve clamp assembly. The sleeve clamp assembly includes a sleeve clamp connector, arc-shaped sleeve clamps hinged to both ends of the sleeve clamp connector, and clamps connecting the arc-shaped sleeve clamps to the corresponding rope-blocking components.

6. The automatic rope-stopping device for drilling rigs as described in claim 5, characterized in that, At least one pair of arc-shaped elastic steel sheets are symmetrically arranged on both sides of the working surface of the card holder.

7. The automatic rope-stopping device for drilling rigs as described in claim 1, characterized in that, The outer shell of the bracket is an arc-shaped column structure with an inner arc surface and an outer arc surface, and the pulley retraction assembly and pulley buffer assembly are evenly arranged along the center of the arc surface.

8. The automatic rope-stopping device for drilling rigs as described in claim 7, characterized in that, The support has upper and lower layers, with the pulley retraction assembly and pulley buffer assembly located on the upper layer and the drive device located on the lower layer.

9. The automatic rope-stopping device for drilling rigs as described in claim 1, characterized in that, The end of the rope-blocking assembly passes through the dead rope fixing frame and is clamped by the dead rope clamp plate, and is tightened by the set screw. The dead rope fixing frame is connected to the bracket.

10. The automatic rope-stopping device for drilling rigs as described in claim 1, characterized in that, The front end of the bracket is provided with a rope guide hole for inserting the rope guide assembly.

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