CN102102496B - Fish milling experiment clamping and centralizing device in oilfield operation - Google Patents

Abstract

The invention relates to a clamping and stabilizing device for the grinding and milling experiment of falling fish in oilfield operations. The device includes a bottom worktable, a drill pipe straightening mechanism is fixedly installed directly above the bottom worktable through four circumferentially evenly distributed positioning support rods, and a fish-dropping position adjustment mechanism is installed on the upper surface of the bottom worktable. A fish-felling clamping mechanism is installed on the fish-felling position adjustment mechanism. The invention is used in the multi-point grinding and milling experiment of falling fish, which can reliably straighten the rotating drill string to ensure its drillability; effectively clamp the falling fish with different shapes and postures, and can realize the position adjustment of the falling fish on the horizontal plane, so as to Complete the repair of the fish roof at multiple points of the fish, and enhance the catchability of the fish. The experimental device can truly simulate the working condition of multi-point contact between falling fish and grinding shoes.

Description

Clamping and centralizing device for falling fish grinding and milling experiments in oilfield operations

technical field

The invention relates to a clamping and stabilizing device for the grinding and milling experiment of falling fish in oil field operation, which belongs to the field of experimental operation in oil field operation tools.

Background technique

Catching and milling fallen fish is an unavoidable task in the working process. The so-called fallen fish refer to those falling in the well which hinder the normal drilling and must be cleared before the normal drilling can be resumed. There are mainly two methods of removing fallen fish: salvage and milling. When salvaging a fallen fish, the top of the fish must be milled to facilitate grabbing. For those fish with complex shapes that cannot be removed by salvage, a method must be used. The method of grinding and milling makes it into pieces, so as to relieve the obstruction of the falling fish to the normal drilling. In the operation of the fish milling experiment in the mine, due to the complexity of the shape of the fish, it is difficult to grasp the milling characteristics of the fish, and it is also difficult to control the degree of repair of the top of the fish, which makes the removal of the fish more difficult. Therefore, it is very important to simulate the milling process of falling fish in a ground laboratory.

Contents of the invention

The object of the present invention is to solve the problems existing in the prior art, to provide a fish-falling milling experimental device in the oilfield operation process, to solve the problem of reliable straightening of large and long drill pipes and different shapes of falling fish in the ground-simulating fish-falling milling experiment. Fish gripping problem.

For solving the problems of the technologies described above, design of the present invention is:

A clamping and centralizing device for fish grinding and milling experiments in oilfield operations, which is mainly composed of a drill pipe centralizing mechanism, a fish clamping mechanism, a fish position adjustment mechanism, a bottom workbench and a positioning support rod, and is characterized in that: The centralizing mechanism consists of an open circular upper cover, an open circular body and three centralizing units arranged at equal angles. The open circular upper cover and the open circular body are connected by bolts. The three equal Angle-arranged righting units are connected to the open ring body with a moving pair, and the three equiangularly arranged righting units are respectively composed of a feeding screw, a slider and a spherical roller of the righting mechanism, and the feeding wire of the righting mechanism The bar is connected to the slider through a screw pair, the spherical roller is hinged to the slider through a self-aligning bearing, and the open ring is fixed on the bottom worktable through four positioning support rods; the falling The fish clamping mechanism is composed of a clamping mechanism feed screw and a V-shaped gripper. The clamping mechanism feed screw is connected with the fish-falling position adjustment mechanism through a screw pair. The V-shaped gripper is connected with the gripper The feed screw of the mechanism is connected by a spherical pair; the fish-dropping position adjustment mechanism is composed of a hand wheel, a feed screw, an upper bracket, a middle bracket, and a lower bracket, and the hand wheel is fixedly connected with the feed screw. The screw and the bracket are connected through a screw pair.

According to above-mentioned inventive concept, the present invention adopts following technical scheme:

A clamping and stabilizing device for fish grinding and milling experiments in oilfield operations, comprising a bottom worktable, characterized in that a drill pipe centralization mechanism is fixedly installed on the front of the bottom worktable through four circumferentially evenly distributed positioning support rods. Above: a fish-dropping position adjustment mechanism is installed on the upper surface of the bottom workbench; a fish-dropping clamping mechanism is installed on the said fish-dropping position adjustment mechanism. The above-mentioned drill pipe straightening mechanism is composed of an open circular upper cover, an open circular body and three centralizing units arranged at equal angles. The open annular upper cover is connected with the open annular body by bolts, and the three equiangularly arranged centering units are connected with the open annular body by a moving pair, and the moving pair refers to three equiangularly arranged The righting unit is installed in the installation groove of the open ring body, and can only move radially in the open ring body. The three straightening units arranged at equal angles are respectively composed of a feeding screw of a righting mechanism, a slider and Composed of a spherical roller, the feed screw of the centralizing mechanism and the slider are connected by a screw pair. The screw connection means that the feed screw and the slider of the centralizing mechanism can only perform relative helical movement along their axis. The spherical The rollers are hinged with the slide block through self-aligning bearings, and the open ring body is fixed on the bottom workbench through the four positioning support rods. Above-mentioned falling fish position adjustment mechanism is made up of hand wheel, feed screw, upper support, middle support, lower support. The hand wheel is fixedly connected to the feed screw, and the feed screw is connected to the upper bracket and the middle part through a screw pair. The screw pair connection means that the feed screw and the upper bracket and the middle part can only be connected along its The axis makes relative helical movement, and the lower bracket is fixed on the upper surface of the bottom worktable. The above-mentioned falling fish clamping mechanism is composed of a clamping mechanism feed screw and a V-shaped clamping claw. The feed screw of the clamping mechanism and the fish-dropping position adjustment mechanism are connected through a screw pair, and the screw pair connection means that the feed screw of the clamping mechanism and the fish-dropping position adjustment mechanism can only perform relative helical movement along its axis. The V-shaped gripper is connected to the feed screw of the clamping mechanism through a spherical pair, and the spherical pair is connected to the V-shaped gripper and the feed screw of the clamping mechanism through a spherical surface, and only three independent movements can be made around the center of the sphere. relative rotation.

Compared with the prior art, the present invention has the following obvious outstanding substantive features and significant advantages:

This clamping and erecting device for fish grinding and milling experiments in oilfield operations solves the difficult problem of grinding fish in oilfield operations. First of all, this device can realize reliable straightening of large and long drill pipes, and can clamp fish of different shapes and postures; secondly, it can also realize fine-tuning of the position of fish, and realize multi-point positioning of fish in oil field operations. Milling. In addition, the device is simple in structure, easy to operate, simple and reliable connection between each mechanism unit, easy to disassemble, and all its functions can be realized manually without other auxiliary equipment, which reduces the input of manpower and material resources, greatly reduces the cost of experiments, and has remarkable benefits.

Description of drawings:

Fig. 1 is the front view of the clamping and stabilizing device for the grinding and milling experiment of falling fish in oil field operation;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is a sectional view at A-O-A in Fig. 2 .

Detailed ways:

Preferred embodiments of the present invention are described as follows in conjunction with the accompanying drawings:

Embodiment 1: Referring to Fig. 1, the clamping and stabilizing device for the milling and milling experiment of falling fish in the oilfield operation includes a bottom table 18, and a drill pipe stabilizing mechanism 1 is fixedly installed on it through four circumferentially evenly distributed positioning support rods 10. directly above the bottom workbench 18; a fish-felling position adjustment mechanism 3 is installed on the upper surface of the bottom workbench 18; a fish-falling clamping mechanism 2 is installed on the fish-falling position adjustment mechanism 3 .

Embodiment 2: Referring to Figures 1 to 3, the clamping and stabilizing device for the fish-falling milling experiment in this oilfield operation consists of a drill pipe straightening mechanism 1, a fish-falling clamping mechanism 2, a fish-falling position adjustment mechanism 3, a positioning support rod 10 and The bottom workbench 18 is composed of the drill pipe righting mechanism 1 consisting of an open circular upper cover 8, an open circular body 9 and three centralizing units arranged at equal angles; the falling fish clamping mechanism 2 is composed of a clamping mechanism Feed screw 13 and V-shaped jaw 11 form; Described fish drop position adjustment mechanism 3 is made up of hand wheel 17, feed screw 19, upper support 14, middle support 15, lower support 16. The opening annular upper cover 8 of the drill pipe righting mechanism 1 is connected with the opening annular body 9 by bolts, and the three equiangularly arranged centering units are connected with the opening annular body 9 by moving pairs, and the three Two straightening units arranged at equal angles are respectively composed of a straightening mechanism feed screw 4, a slider 5 and a spherical roller 6, and the straightening mechanism feed screw 4 and the slider 5 are connected by a screw pair, and the spherical roller 6 passes through The self-aligning bearing 7 is hinged with the slide block 5, and the open ring body 9 is fixed on the bottom worktable 18 through the four positioning support rods 10 described above. The clamping mechanism feed screw 13 is connected with the fish position adjustment mechanism 3 by a screw pair, and the V-shaped jaw 11 is connected with the clamping mechanism feed screw 13 by a spherical pair 12. The handwheel 17 of the fish-dropping position adjustment mechanism 3 is fixedly connected with the feed screw 19, and the feed screw 19 is connected with the brackets 14, 15 through a screw pair.

Embodiment 3: Referring to Fig. 1 ~ Fig. 3, the outer surface of the spherical roller 6 in the drill pipe straightening mechanism 1 of the present embodiment is a drum shape, so that the spherical roller 6 is in point contact with the drill pipe, and the work of righting the drill pipe is eliminated. During the process, the righting problem caused by the non-parallel axis of the drill pipe axis and the axis of the open torus 9. Three equiangularly arranged uprighting units can be fed independently to achieve reliable clamping of drill pipes. Other compositions and connections are the same as those in Embodiment 2.

Embodiment 4: Referring to Fig. 1 to Fig. 3, the opening ring body 9 of this embodiment is an opening shape, which is suitable for the working condition of fixing the drill pipe clamping mechanism 1 first, and then dropping the drill pipe; at the same time, it is suitable for pre-fixing the large and long Drill pipe, after installing the working condition of the clamping mechanism 1. Other compositions and connections are the same as in the second embodiment.

The specific working process of the clamping and stabilizing device in the falling fish milling experiment is as follows (see Figure 1~Figure 3):

1. Fix the clamping and stabilizing device in the fish-dropping milling experiment in the oilfield operation, drop the drill pipe so that it passes through the inside of the open ring body 9, and rotate the feed screw 2 of the three drill pipe centralizing mechanisms arranged at equal angles respectively , adjust the position of the drill pipe straightening unit, so that the spherical roller 6 is in close contact with the surface of the drill pipe to achieve the purpose of straightening the drill pipe; when the drill pipe is long and the drill pipe needs to be fixed in advance, the drill pipe 1 Take it off, then fix the device, and finally reinstall the drill pipe centralizing mechanism 1, pass the drill pipe through the inside of the experimental device, and then adjust the clamping position of the centralizing unit.

2. Adjust the feed screw 13 in the fish clamping mechanism 2 so that the V-shaped claws 11 are in close contact with the fish to clamp and fix the fish.

3. Rotate the two handwheels 17 of the fish position adjustment mechanism to realize the position change of the fish, and then change the contact position between the grinding shoe and the fish, which can simulate the multi-point milling of the fish in the oil field operation process.

Claims (4)

1. fish milling experiment clamping erection device in the oil field operation, comprise one the bottom workbench (18), it is characterized in that: have a drill stem righting mechanism (1) by four circumferential uniform positioning support struts (10) be fixedly mounted on described bottom workbench (18) directly over; There is a fish position adjusting mechanism (3) to be installed on described bottom workbench (18) upper surface; There is a fish clamping device (2) to be installed on the described fish position adjusting mechanism (3).

2. the clamping erection device is tested in the fish milling in the oil field operation according to claim 1, it is characterized in that: described drill stem righting mechanism (1) is comprised of open circles annular loam cake (8), open circles ring body (9) and three equiangularly arranged righting unit; Described open circles annular loam cake (8) is bolted with open circles ring body (9), described three equiangularly arranged righting unit are connected with moving sets with open circles ring body (9), described moving sets refers to that three equiangularly arranged righting cellular installations are in the mounting groove of open circles ring body (9), can only be radially mobile in open circles ring body (9), described three equiangularly arranged righting unit are respectively respectively by a righting mechanism feed screw (4), a slide block (5) and a spherical roller (6) form, described righting mechanism feed screw (4) is connected by screw pair with slide block (5), and described righting mechanism feed screw (4) can only be done relative screw along righting mechanism feed screw (4) axis with slide block (5); Described spherical roller (6) is hinged by self-aligning bearing (7) and slide block (5), and described open circles ring body (9) is fixed on the bottom workbench (18) by four described positioning support struts (10).

3. fish milling experiment clamping erection device in the oil field operation according to claim 1 is characterized in that described fish position adjusting mechanism (3) is comprised of handwheel (17), feed screw (19), upper bracket (14), middle bracket (15), lower bracket (16); Described handwheel (17) is fixedly connected with feed screw (19), described feed screw (19) is connected by screw pair with upper bracket (14), middle bracket (15), described feed screw (19) cooperates and can only do relative screw along feed screw (19) axis with upper bracket (14), middle bracket (15), and described lower bracket (16) is fixed on described bottom workbench (18) upper surface.

4. the clamping erection device is tested in the fish milling in the oil field operation according to claim 1, and it is characterized in that: described fish clamping device (2) is comprised of clamping device feed screw (13) and V-arrangement jaw (11); Described clamping device feed screw (13) is connected by screw pair with fish position adjusting mechanism (3), described clamping device feed screw (13) can only be done relative screw along clamping device feed screw (13) axis with fish position adjusting mechanism (3), described V-arrangement jaw (11) is connected by spherical pair (12) with clamping device feed screw (13), described spherical pair (12) is that V-arrangement jaw (11) is connected by sphere with clamping device feed screw (13), can only do three around spherical pair (12) centre of sphere and independently relatively rotate.

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