CN102953693B - Multifunctional drill rod air operated slip - Google Patents

Abstract

The invention discloses a multifunctional drill pipe pneumatic slip, which is provided with a slip lifting mechanism to drive the slip to move up and down relative to the slip seat, the slip lifting mechanism includes an upper base and a lower base; Tile suspension mechanism; a cross-link pneumatic jacking mechanism is respectively provided between at least two opposite sides of the upper and lower bases. One end of the first and second connecting rods are respectively rotatably connected to the upper and lower bases, and the other ends of the first and second connecting rods are respectively slidably connected to the lower and upper bases; one end of the piston rod of the cylinder is rotatably connected to the second On the slidable connection end of the connecting rod, the base of the cylinder is rotatably connected to one end of an L-shaped connecting rod, and the other end of the L-shaped connecting rod is rotatably connected to the lower base. The multifunctional drill pipe pneumatic slip not only has a simple structure, is convenient to use, and has a high safety factor, but also can reduce labor costs and improve work efficiency.

Description

Multifunctional drill pipe pneumatic slips

technical field

The invention relates to a slip, in particular to a multifunctional drill pipe pneumatic slip.

Background technique

Drilling slips are a kind of drilling power slips used for oil, natural gas or geological drilling to hold the pipe string during the pull-in process. At present, the main problem is that manual loading and unloading of the slips is required during work. Operation is not only slow in disassembly and assembly, but also prone to personal accidents, damage to equipment, and reduced work efficiency.

Contents of the invention

In order to overcome the above defects, the present invention provides a multifunctional drill pipe pneumatic slip, which not only has a simple structure, is convenient to use, and has a high safety factor, but also can reduce labor costs and improve work efficiency.

The technical solution adopted by the present invention to solve the technical problem is: a multifunctional drill pipe pneumatic slip, including a closed slip seat with a conical inner wall, symmetrically installed in the truncated conical cavity of the slip seat At least three wedge-shaped slips; the back of the slips matches the conical surface of the slip seat, and the front of the slips is a cylindrical arc surface; a slip lifting mechanism is also provided to drive the slips relative to the slips The seat moves up and down. The slip lifting mechanism includes an upper base and a lower base arranged in parallel and at intervals. The center of the upper base is provided with a through hole at least for the drill pipe to pass through. The center of the lower base is provided with a hole for at least A through hole through which the slips pass; a slip suspension mechanism for hanging slips is provided on the lower side of the upper base; a cross link is respectively provided between at least two opposite sides of the upper base and the lower base Pneumatic jacking mechanism, the cross-link pneumatic jacking mechanism includes a first connecting rod, a second connecting rod and a cylinder that are movably connected in a central cross, one end of the first connecting rod and the second connecting rod are respectively rotatably connected to the On the upper base and the lower base, the other ends of the first connecting rod and the second connecting rod are respectively slidably connected to the lower base and the upper base; one end of the piston rod of the cylinder is rotatably connected to the first connecting rod. On the slidable connection ends of the two connecting rods, the base of the cylinder is rotatably connected to one end of an L-shaped connecting rod, and the other end of the L-shaped connecting rod is rotatably connected to the lower base.

As a further improvement of the present invention, the upper base and the lower base are both square, and the cross-link pneumatic lifting mechanisms are respectively arranged on two opposite sides of the upper base and the lower base.

As a further improvement of the present invention, a mud scraper with a drill pipe through hole in the center and a mud scraper holding plate fixed around the mud scraper are also provided on the upper base.

As a further improvement of the present invention, the structure that the other ends of the first connecting rod and the second connecting rod are slidably connected to the lower base and the upper base is: on the upper side of the lower base and the upper base A guide rail groove is respectively arranged on the lower side, and a roller is respectively arranged at the other end of the first connecting rod and the second connecting rod, and the roller can be slidably placed in the guide rail groove.

As a further improvement of the present invention, the slip suspension mechanism includes a U-shaped suspension rod and a hook, both ends of the U-shaped suspension rod are fixedly connected to the lower side of the upper base, and the upper end of the hook is movably sleeved on The U-shaped hanging rod.

As a further improvement of the present invention, the bottom of the U-shaped suspension rod is inclined, and the distance between the end close to the axis of the drill rod and the upper base is shorter than the end far away from the axis of the drill rod.

The beneficial effect of the present invention is that the upper base is driven up and down by the mechanical lifting mechanism formed by the cross link and the cylinder, and then the slips are moved up and down. It is not only simple in structure, easy to use, high in safety factor, and can reduce Reduce labor costs and improve work efficiency.

Description of drawings

Fig. 1 is a structural schematic diagram of the slip lifting mechanism of the present invention;

Fig. 2 is a schematic cross-sectional structure diagram of the slip lifting mechanism of the present invention when lifting slips;

Fig. 3 is a schematic structural diagram of the use state of the present invention;

Fig. 4 is a schematic diagram of the cross-sectional structure along A-A in Fig. 3 .

In conjunction with the accompanying drawings, the following descriptions are made:

10——slips 20——slip seat

30——drill pipe 1——upper base

2——Lower Base 3——Slip Suspension Mechanism

4——The first connecting rod 5——The second connecting rod

6——Cylinder 7——L-shaped connecting rod

8——Mud scraper 9——Mud scraper pressure plate

12——Rail groove 13——Roller

31——U-shaped suspension rod 32——hook

Detailed ways

In conjunction with the accompanying drawings, the present invention is described in detail, but the scope of protection of the present invention is not limited to the following examples, that is, all simple equivalent changes and modifications made with the patent scope of the present invention and the content of the specification are still patents of the present invention. covered.

As shown in Figures 1, 2, and 3, a multifunctional drill pipe pneumatic slip includes a closed slip seat 20 with a conical inner wall, and at least three slips are symmetrically installed in the truncated conical cavity of the slip seat. Wedge-shaped slips 10; the back of the slips matches the conical surface of the slip seat, and the front of the slips is a cylindrical arc surface; a slip lifting mechanism is also provided to drive the slips up and down relative to the slip seat movement, the slip lifting mechanism includes an upper base 1 and a lower base 2 arranged in parallel at intervals, the center of the upper base is provided with a through hole at least for the drill rod 30 to pass through, and the center of the lower base is provided with at least a through hole capable of A through hole for the slips to pass through; a slip suspension mechanism 3 for hanging slips is provided on the lower side of the upper base; a crossing is respectively provided between at least two opposite sides of the upper base and the lower base Connecting rod pneumatic jacking mechanism, the cross-linking pneumatic jacking mechanism includes a first connecting rod 4, a second connecting rod 5 and a cylinder 6 that are movably connected in a central cross, and one end of the first connecting rod and the second connecting rod are respectively It is rotatably connected to the upper base and the lower base, and the other ends of the first connecting rod and the second connecting rod are respectively slidably connected to the lower base and the upper base; one end of the piston rod of the cylinder is rotatable Connected to the slidable connection end of the second connecting rod, the base of the cylinder is rotatably connected to one end of an L-shaped connecting rod 7, and the other end of the L-shaped connecting rod is rotatably connected to the lower base. When in use, the lower base 2 of the lifting mechanism is fixed on the upper side of the slip seat, and the slips are first fixed on the upper base 1 through the slip suspension mechanism 3, and the air control valve of the cylinder is activated to make the air out of the cylinder, and the piston rod of the cylinder telescopic, drive the first and second connecting rods to slide along the lower base and the upper base respectively, so that the distance between the first and second connecting rods between the upper and lower bases is shortened, that is, the upper base moves down, and the upper base drives the slips along the slips The tile seat goes down, and the drill pipe is drawn down to the center to clamp the drill pipe through the downward movement. After the drill pipe is connected, it can start working. After work, when it is necessary to open the clamping state, start the air control valve of the cylinder of the lifting mechanism, the cylinder will take in air, and the piston rod of the cylinder will move outward to drive the first and second connecting rods to slide along the lower base and the upper base respectively, so that the first 1. The longitudinal distance between the upper and lower bases of the two connecting rods is stretched, driving the upper base to move up, thereby driving the slips to move up, the slips are moved out of the slip seat and then opened outwards, and at the same time give way to the drill pipe .

Preferably, both the upper base and the lower base are square, and the cross-link pneumatic jacking mechanisms are respectively arranged on two opposite sides of the upper base and the lower base.

Preferably, a mud scraper 8 with a drill pipe through hole in the center and a mud scraper pressure plate 9 fixed around the mud scraper are also provided on the upper base.

Preferably, the structure that the other ends of the first connecting rod and the second connecting rod are slidably connected to the lower base and the upper base is: on the upper side of the lower base and the lower side of the upper base respectively A guide rail groove 12 is provided, and the other ends of the first connecting rod and the second connecting rod are provided with a roller 13 respectively, and the rollers can be slidably placed in the guide rail groove.

Preferably, the slip suspension mechanism includes a U-shaped suspension rod 31 and a hook 32, both ends of the U-shaped suspension rod are fixedly connected to the lower side of the upper base, and the upper end of the hook is movably sleeved on the U-shaped hanging rod.

Preferably, the bottom of the U-shaped suspension rod is inclined, and the distance between the end close to the axis of the drill rod and the upper base is shorter than that of the end away from the axis of the drill rod, as shown in FIG. 4 . In this way, after the slips move upward together with the upper base and leave the slip seat, the slips will move outwards along the bottom of the U-shaped suspension rod due to their own gravity, so that the slips will automatically open outwards and give way to the drill pipe. .

Claims (6)

1. A multifunctional drill pipe pneumatic slip, comprising a closed slip seat (20) with a conical inner wall, at least three wedge-shaped slips (10) are symmetrically installed in the truncated conical cavity of the slip seat The back of the slip is matched with the conical surface of the slip seat, and the front of the slip is a cylindrical arc surface; a slip lifting mechanism is also provided to drive the slip to move up and down relative to the slip seat. In that: the slip lifting mechanism includes an upper base (1) and a lower base (2) arranged at intervals in parallel, the center of the upper base is provided with a through hole at least through which the drill rod (30) can pass, and the lower base The center of the center is provided with at least the through hole that allows the slips to pass through; the lower side of the upper base is provided with a slip suspension mechanism (3) for hanging slips; the upper base and the lower base are at least two opposite A cross-link pneumatic jacking mechanism is respectively provided between the sides, and the cross-link pneumatic jacking mechanism includes a first connecting rod (4) and a second connecting rod (5) and a cylinder (6) that are movably connected in a central cross, One end of the first connecting rod and the second connecting rod are respectively rotatably connected to the upper base and the lower base, and the other ends of the first connecting rod and the second connecting rod are respectively slidably connected to the lower base and on the upper base; one end of the piston rod of the cylinder is rotatably connected to the slidable connection end of the second connecting rod, and the base of the cylinder is rotatably connected to one end of an L-shaped connecting rod (7), the L The other end of the connecting rod is rotatably connected to the lower base. 2. The multifunctional drill pipe pneumatic slip according to claim 1, characterized in that: the upper base and the lower base are both square, and the cross-link pneumatic jacking mechanism is respectively set on the upper base and the lower base on two opposite sides of the . 3. The multifunctional drill pipe pneumatic slip according to claim 1 or 2, characterized in that: a mud scraper (8) with a drill pipe through hole in the center is also provided on the upper base and fixed on the Scraper plate (9) around the scraper. 4. The multifunctional drill pipe pneumatic slip according to claim 1 or 2, characterized in that: the other ends of the first connecting rod and the second connecting rod are respectively slidably connected to the lower base and the upper base The structure is as follows: a guide rail groove (12) is respectively set on the upper side of the lower base and the lower side of the upper base, and a roller (13) is respectively set at the other end of the first connecting rod and the second connecting rod, The roller can be slidably placed in the groove of the guide rail. 5. The multifunctional drill pipe pneumatic slip according to claim 1 or 2, characterized in that: the slip suspension mechanism includes a U-shaped suspension rod (31) and a hook (32), and the U-shaped suspension rod Both ends are fixedly connected to the lower side of the upper base, and the upper end of the hook is movably sleeved on the U-shaped suspension rod. 6. The multifunctional drill pipe pneumatic slip according to claim 5, characterized in that: the bottom of the U-shaped suspension rod is inclined, and its end close to the drill pipe axis is farther from the drill pipe axis than its end to the upper base The distance is short.