Single-pair clamp holder for drilling machine

Abstract

The utility model relates to a single-pair clamp holder for a drilling machine, and belongs to the technical field of drilling machines. Comprising a hollow shell, two slips in pairs and an oil cylinder used for enabling the slips to move. The two slips are respectively a slip I and a slip II; a counter-pulling screw rod and a counter-pulling plate are also arranged; the two ends of the counter-pulling screw rod are fixedly connected with the counter-pulling plate and the second slip correspondingly, the first slip is located between the counter-pulling plate and the second slip, and the counter-pulling screw rod penetrates through the first slip; the oil cylinder is located between the reverse pulling plate and the first slip and can drive the first slip and the second slip to be close to or away from each other. According to the clamping device, driving of the two slips can be achieved through one oil cylinder, the structural space is saved, and the production cost is reduced. The drilling rod clamping device is reasonable in structure, convenient to control and capable of adaptively changing along with the position of a drilling rod, and safe and stable clamping of the drilling rod is guaranteed.

Description

Technical Field

[0001] The utility model relates to a single pair of clamps for a drilling rig, belonging to the technical field of drilling rigs. Background Art

[0002] A drilling rig is a machine used for drilling and drilling in engineering projects. Examples include exploration drills and water well drills. The power head on the drilling rig rotates the drill rod, which then drills the hole. During use, the drill rod needs to be removed and replaced. Therefore, a clamp is typically provided for the power head. After the clamp secures the drill rod, the corresponding part of the power head rotates to remove the rod.

[0003] Currently, there are problems with the structure of the clamping part of the commonly used clamps, such as the problem that the clamping part is not firmly clamped and the problem that the clamping part has a complex structure and occupies space. Utility Model Content

[0004] The purpose of the utility model is to provide a single pair of clamps for a drilling rig to solve the above technical problems.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A single pair of clamps for a drilling rig comprises a hollow shell, two pairs of slips, and an oil cylinder for moving the slips; the two slips are slip 1 and slip 2; a back-pull screw and a back-pull plate are also provided; the two ends of the back-pull screw are fixedly connected to the back-pull plate and slip 2 respectively, slip 1 is located between the back-pull plate and slip 2, and the back-pull screw passes through slip 1; the oil cylinder is located between the back-pull plate and slip 1, and can drive slip 1 and slip 2 to move closer to or away from each other.

[0007] Further improvements of this technical solution are as follows: the back-pull screw is set through the slip one, and the slip one can slide on the back-pull screw; one end of the cylinder barrel of the oil cylinder is fixedly connected to the back-pull plate, and the telescopic rod of the oil cylinder is fixedly connected to the slip one; the clamping surface of the slip two is opposite to the clamping surface of the slip one.

[0008] A further improvement of this technical solution is that four counter-pull screws are provided.

[0009] A further improvement of this technical solution is that the clamping surfaces of slip 1 and slip 2 are arc-shaped.

[0010] A further improvement of the technical solution is that the clamping surfaces of slip 1 and slip 2 are detachably provided with clamping blocks.

[0011] Due to the adoption of the above technical solution, the technical effects achieved by the utility model are as follows:

[0012] The clamp of this utility model is equipped with a pull plate and a pull screw. The pull screw connects the pull plate, slip 1, and slip 2 to form a whole. A hydraulic cylinder is placed between the pull plate and slip 1. The pull action of the pull plate and the pull screw is then used by a single hydraulic cylinder to achieve linked control of the two slips. This prevents the slips at one end from excessively squeezing and damaging the drill pipe. Even if the relative position of the drill pipe within the housing changes, for example, when the drill pipe is no longer in the middle position, the clamp can still maintain adaptive grip.

[0013] The clamp of the utility model can realize the driving of two slips by using one oil cylinder, which not only saves the overall structural space, but also reduces the usage format of the oil cylinder, thereby reducing the production cost.

[0014] The utility model has a reasonable structure and is easy to control, and can adapt to changes in the position of the drill rod, thereby ensuring safe and stable clamping of the drill rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the utility model in a decomposed state;

[0017] Among them, 1. Shell, 2. Back-pull plate, 3. Back-pull screw, 4. Slip 1, 5. Slip 2, 6. Clamping block, 7. Cylinder, 8. Telescopic rod. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] The utility model relates to a single pair of clamps for a drilling rig, which is installed on the drilling rig and is used for clamping a drill rod of the drilling rig so as to realize the disassembly and installation of the drill rod.

[0021] like Figure 1 、 Figure 2As shown, the clamp includes a shell 1, a cava and an oil cylinder. The shell 1 is a hollow structure, and the shell 1 is used to support and install other components, and the clamp is installed on the drilling rig through the shell 1. There is a mounting plate on one end face of the shell 1, and the clamp is installed on the drilling rig through the mounting plate and bolts. The cava is arranged in the internal space of the shell 1. The cava is arranged in pairs, and there are also two cava, namely cava 1 4 and cava 2 5. Cava 1 4 and cava 2 5 are set at a distance, and the clamping surfaces of cava 1 4 and cava 2 5 are opposite. The oil cylinder is used to drive cava 1 4 and cava 2 5 to move relative to each other, so as to achieve clamping of the drill pipe through the clamping surfaces of cava 1 4 and cava 2 5.

[0022] The clamp also includes a counter-pull screw 3 and a counter-pull plate 2. Threaded sections are provided at both ends of the counter-pull screw 3. Nuts secure the ends of the counter-pull screw 3 to the counter-pull plate 2 and slip 2 5, respectively. Slip 1 4 is located between the counter-pull plate 2 and slip 2 5, and the counter-pull screw 3 passes directly through slip 1 4. Slip 1 4 is able to slide on the counter-pull screw 3.

[0023] The pull plate 2, slip 1 4, and slip 2 5 are spaced apart from each other. The clamping surface of slip 2 5 faces the clamping surface of slip 1 4. A cylinder is positioned between the pull plate 2 and slip 1 4. Its ends are connected to the pull plate 2 and slip 1 4, respectively. By controlling the movement of a telescopic rod, the cylinder drives slip 1 4 and slip 2 5 toward or away from each other, thereby clamping and releasing the drill pipe.

[0024] In a specific implementation, a preferred embodiment is to fix one end of the cylinder barrel 7 to the back-pull plate 2, and to fix the end of the telescopic rod 8 of the cylinder to the slip 4. Alternatively, one end of the cylinder barrel 7 of the cylinder can be fixedly connected to the slip 4, and the end of the telescopic rod 8 of the cylinder can be fixedly connected to the back-pull plate 2.

[0025] The clamp is used to achieve simultaneous driving of slip 1 4 and slip 2 5 by the cooperation of the back-pull screw 3 and the back-pull plate 2. In order to ensure smooth and steady movement during the driving, four back-pull screws 3 are usually provided. Figure 1 、 Figure 2 As shown, the four back-pull screws 3 are respectively located at the four corners of the back-pull plate 2, and also at the four corners of slip 1 4 and slip 2 5. When driven by the oil cylinder, the force is stable and the movement is smooth and stable.

[0026] The clamp of the present invention typically has arc-shaped clamping surfaces of slips 1 (4) and 2 (5), which better accommodate cylindrical drill rods. Furthermore, a removable clamping block 6 is typically provided on the clamping surfaces of slips 1 (4) and 2 (5), directly contacting the drill rod. Clamping block 6 is typically made of rubber. The inner surface of clamping block 6 is provided with raised points or bumps that increase friction. Clamping block 6 can be replaced if worn.

[0027] During installation and operation, the hydraulic cylinder is connected to the drilling rig's hydraulic system. When the cylinder's telescopic rod is extended, it directly drives slip 1 (4) toward slip 2 (5). Simultaneously, under the action of the interaction force, one end of the cylinder barrel (7) drives the pull-back plate (2) away from slip 2 (5). Furthermore, the pull-back screw (3) pulls slip 2 (5) toward slip 1 (4). Slip 1 (4) and slip 2 (5) move together, clamping the drill rod. When the telescopic rod is retracted, slip 1 (4), slip 2 (5), and pull-back plate (2) move in the opposite manner, with slip 1 (4) and slip 2 (5) moving away from each other, releasing the drill rod.

[0028] In a configuration where the cylinder barrel is connected to the pull plate and the telescopic rod is connected to slip 1, the ends of the cylinder barrel and telescopic rod, as well as their components, are in a fluid state. Ideally, the cylinder barrel and telescopic rod move simultaneously relative to each other, causing slips 1 and 2 to simultaneously approach or move away from the drill rod, ultimately clamping or releasing the drill rod simultaneously. However, due to the inherent movement of the cylinder barrel and telescopic rod, in actual operation, slip 1 may move before slip 2. In other words, when the cylinder is actuated, the telescopic rod actuates first, driving slip 1 to move first (this may involve a slight movement of the cylinder barrel, which in turn, via the pull plate and pull screw, also causes a slight movement of slip 2). After slip 1 contacts the drill rod, slip 1 stops moving due to the blocking effect of the drill rod (the force exerted by slip 1 on the drill rod is minimal, preventing damage). Then, under the interaction, the cylinder begins to move significantly, which in turn drives Slip 2 to move slightly through the back-pull plate and back-pull screw until Slip 2 also touches the drill pipe. Then, Slip 1 and Slip 2 clamp the drill pipe at the same time.

[0029] The clamp uses one oil cylinder to drive two cavas, saving structural space and reducing production costs. The linkage control of the two cavas is achieved through one oil cylinder, a back-pull plate and a back-pull screw, so that the cava at one end will not cause excessive squeezing of the drill rod and damage the drill rod due to inadequate control. Moreover, even if the relative position of the drill rod in the shell changes, adaptive clamping can be performed. If two separate oil cylinders are used to push the cavas, it is very easy for one of the oil cylinders to push the cavas and contact the drill rod without stopping in time, causing damage to the drill rod. The technical solution realizes the linkage control of the two cavas through one oil cylinder, a back-pull plate and a back-pull screw, which can ensure that there will be no damage to the drill rod due to excessive pushing.

[0030] The utility model has a reasonable structure and is easy to control, and can adapt to changes in the position of the drill rod, thereby ensuring safe and stable clamping of the drill rod, while also ensuring that no damage is caused to the drilling vehicle due to excessive pushing.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A single pair of clamps for a drilling rig, characterized by: The invention comprises an internally hollow shell (1), two pairs of slips and an oil cylinder for moving the slips; the two slips are slip 1 (4) and slip 2 (5); a back-pull screw (3) and a back-pull plate (2) are also provided; the two ends of the back-pull screw (3) are fixedly connected to the back-pull plate (2) and slip 2 (5), respectively, slip 1 (4) is located between the back-pull plate (2) and slip 2 (5), and the back-pull screw (3) passes through slip 1 (4); the oil cylinder is located between the back-pull plate (2) and slip 1 (4), and can drive slip 1 (4) and slip 2 (5) to move closer to or away from each other.

2. A single pair of clamps for a drilling rig according to claim 1, characterized in that: The back-pull screw (3) is arranged through the slip 1 (4), and the slip 1 (4) can slide on the back-pull screw (3); one end of the cylinder barrel (7) of the oil cylinder is fixedly connected to the back-pull plate (2), and the telescopic rod (8) of the oil cylinder is fixedly connected to the slip 1 (4); the clamping surface of the slip 2 (5) is opposite to the clamping surface of the slip 1 (4).

3. The single pair of clamps for a drilling rig according to claim 1, characterized in that: Four back-pull screws (3) are provided.

4. A single pair of clamps for a drilling rig according to claim 1, characterized in that: The clamping surfaces of the slip 1 (4) and the slip 2 (5) are arc-shaped.

5. The single pair of clamps for a drilling rig according to claim 1, characterized in that: The clamping surfaces of the slip 1 (4) and the slip 2 (5) are detachably provided with a clamping block (6).

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