Auxiliary device for running casing pipe

Abstract

The utility model relates to the technical field of well cementation construction, in particular to a casing running auxiliary device. The casing running auxiliary device comprises a mounting ring frame, an arc-shaped plate is mounted on the mounting ring frame, and a plurality of steel balls are embedded in the inner arc surface of the arc-shaped plate; and a middle connecting assembly is mounted on the mounting ring frame. According to the casing running auxiliary device, the steel balls which are rotationally connected are arranged on the inner plate wall of the arc-shaped plate, so that the casing can quickly fall into an oil well along the guide structure, and the sliding seat is driven to keep stable in the process of running the hoisting equipment due to the action of the elastic force of the spring on the guide rod, so that the hoisting equipment can run stably. The amplitude of shaking or deviation when the lower casing pipe is put down is reduced, after the audible and visual alarm is started due to lateral deviation of the lower casing pipe in the putting-down process of the hoisting equipment, a worker can quickly know the condition of the deviation amplitude when the lower casing pipe is put down through the audible and visual alarm, and therefore technical correction can be conducted in time to avoid installation accidents.

Description

Technical Field

[0001] The utility model relates to the technical field of cementing construction, in particular to a casing lowering auxiliary device. Background Art

[0002] In the field of oil drilling and production, casing is a steel pipe used to support the wall of oil and gas wells to ensure the normal operation of the entire oil well during the drilling process and after completion. Each well uses several layers of casing according to different drilling depths and geological conditions. The casing is inserted into the wellbore and fixed with cement to prevent the wellbore from separating the rock strata and the wellbore from collapsing, and to ensure the circulation of drilling mud for drilling and production. At present, in the process of coalbed methane drilling and production, the casing needs to be lowered into the oil well by lifting equipment. Since the casing needs to be kept centered in the wellbore when lowering the casing, a centralizer is usually used. Under normal circumstances, the contact force between the centralizer and the casing is controllable and within the design range. However, in some special cases, the contact force may exceed expectations, and it is difficult for the staff to find it in time, resulting in excessive displacement of the casing and thus inducing safety accidents.

[0003] Therefore, it is necessary to provide a new casing lowering auxiliary device to solve the above technical problems. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a casing lowering auxiliary device.

[0005] The casing lowering auxiliary device provided by the utility model comprises a mounting ring frame, on which a plurality of arc-shaped plates distributed in an annular manner and arranged axially are mounted, and the inner arc surface of each of the arc-shaped plates is embedded with a plurality of steel balls evenly distributed and rotatably connected;

[0006] A central link assembly for elastically connected arc plates is mounted on the mounting ring frame, and the central link assembly includes a mounting frame, the mounting frame is fixedly mounted on the mounting ring frame, and an elastically connected sliding seat is inserted in the mounting frame, a connecting bracket is fixedly mounted on the sliding seat, and the connecting bracket is fixedly connected to the bottom of the arc plate.

[0007] Preferably, two guide rods which are symmetrically distributed and radially arranged along the mounting ring frame are fixedly installed in the mounting frame, and the sliding seat sleeve is arranged on the two guide rods and is slidably connected to the guide rods.

[0008] Preferably, each of the guide rods is sleeved with a spring, one end of the spring is fixedly connected to the inner wall of the mounting frame, and the other end of the spring is fixedly connected to the plate surface of the sliding seat away from the axis of the mounting ring frame.

[0009] Preferably, a plurality of annularly distributed arc-shaped plates on the mounting ring frame constitute a guide structure for lowering the casing.

[0010] Preferably, a rear plate is fixedly mounted on the rear side of the mounting frame, and an audible and visual alarm and a contact switch for turning the audible and visual alarm on and off are fixedly mounted on the rear plate.

[0011] Preferably, an abutment rod is fixedly mounted on the plate surface of the connecting bracket away from the axis of the mounting ring frame, and the abutment rod is arranged opposite to the contact sheet switch.

[0012] Preferably, an eddy current detection sensor is fixedly mounted on the inner plate wall of each of the arc-shaped plates.

[0013] Preferably, both side walls of the installation frame are fixedly mounted with fixing ears, and the fixing ears are fixedly mounted on the installation ring frame by screws.

[0014] Compared with the related art, the casing lowering auxiliary device provided by the utility model has the following beneficial effects:

[0015] The utility model provides rotatably connected steel balls on the inner plate wall of the arc-shaped plate, so that the lower casing can be quickly dropped into the oil well along the guide structure, and because the sliding seat is acted upon by the spring force on the guide rod, the lower casing is driven to remain stable during the lowering process of the lifting equipment, thereby reducing the amplitude of shaking or deviation of the lower casing during the lowering process. When the lower casing deviates sideways during the lowering process of the lifting equipment, so that the sound and light alarm is activated, the staff can quickly know the deviation amplitude when the casing is below the lower casing through the sound and light alarm, so that technical correction can be carried out in time to avoid inducing installation accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a preferred embodiment of the casing lowering auxiliary device provided by the utility model;

[0017] Figure 2 for Figure 1 The structural schematic diagram of the mid-link assembly shown;

[0018] Figure 3 for Figure 2 A partial cross-sectional structural schematic diagram of the center link assembly is shown.

[0019] Numbers in the figure: 1. Mounting ring; 2. Arc plate; 3. Steel ball; 4. Central link assembly; 41. Mounting frame; 42. Sliding seat; 43. Connecting bracket; 44. Spring; 45. Guide rod; 46. Fixed ear piece; 5. Rear plate; 6. Sound and light alarm; 61. Contact switch; 7. Abutment rod; 8. Eddy current detection sensor. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0022] See also Figures 1 to 3 An embodiment of the utility model provides a casing lowering auxiliary device, which includes a mounting ring frame 1, steel balls 3 and a central coupling component 4.

[0023] In the embodiments of the present invention, please refer to Figures 1 to 3 , a plurality of annularly distributed and axially arranged arc plates 2 are installed on the mounting ring frame 1, and the plurality of annularly distributed arc plates 2 on the mounting ring frame 1 constitute a guide structure for the lower casing, and the inner arc surface of each arc plate 2 is embedded with a plurality of uniformly distributed and rotatably connected steel balls 3; and a middle link component 4 for elastically connected arc plates 2 is installed on the mounting ring frame 1, and the middle link component 4 includes a mounting frame 41, the mounting frame 41 is fixedly mounted on the mounting ring frame 1, and an elastically connected sliding seat 42 is inserted in the mounting frame 41, specifically, Two guide rods 45 symmetrically distributed and radially arranged along the mounting ring frame 1 are fixedly installed in the mounting frame 41, and the sliding seat 42 is sleeved on the two guide rods 45 and slidably connected with the guide rods 45, and each guide rod 45 is sleeved with a spring 44, one end of the spring 44 is fixedly connected to the inner wall of the mounting frame 41, and the other end of the spring 44 is fixedly connected to the plate surface of the sliding seat 42 away from the axis of the mounting ring frame 1, and a connecting bracket 43 is fixedly installed on the sliding seat 42, and the connecting bracket 43 is fixedly connected to the bottom of the arc plate 2.

[0024] It should be noted that: the mounting ring frame 1 is fixed to the wellhead by screws and the mounting ring frame 1 is kept coaxially arranged with the wellhead, and then the lower casing is inserted into the oil well through the guide structure composed of multiple arc-shaped plates 2 by the lifting equipment. Since the inner plate wall of the arc-shaped plate 2 is provided with a rotatably connected steel ball 3, the lower casing can be quickly dropped into the oil well along the guide structure, and because the sliding seat 42 is acted upon by the elastic force of the spring 44 on the guide rod 45, the lower casing is driven to remain stable during the lowering process of the lifting equipment, thereby reducing the amplitude of shaking or deviation of the lower casing when it is lowered.

[0025] Furthermore, fixing ears 46 are fixedly mounted on both side walls of the mounting frame 41 , and the fixing ears 46 are fixedly mounted on the mounting ring frame 1 by screws, thereby facilitating the installation of the mounting frame 41 on the mounting ring frame 1 .

[0026] In the embodiments of the present invention, please refer to Figures 1 to 3A rear plate 5 is fixedly installed on the rear side of the mounting frame 41, and a sound and light alarm 6 and a contact switch 61 for turning on and off the sound and light alarm 6 are fixedly installed on the rear plate 5, and a contact rod 7 is fixedly installed on the plate surface of the connecting bracket 43 away from the axis of the mounting ring frame 1, and the contact rod 7 is arranged opposite to the contact switch 61.

[0027] It should be noted that: when the lower casing deviates to the side during the lowering process of the lifting equipment, the lower casing abuts against the arc plate 2 in the side-deviated position, so the arc plate 2 drives the sliding seat 42 to slide backward along the guide rod 45 through the connecting bracket 43, so that the spring 44 is compressed. When the abutment rod 7 abuts against the contact switch 61, the contact switch 61 activates the sound and light alarm 6. Therefore, the staff can quickly know the deviation amplitude when the lower casing is under, so that technical correction can be carried out in time to avoid inducing installation accidents.

[0028] In this solution, an eddy current detection sensor 8 is fixedly installed on the inner plate wall of each of the arc plates 2. When the lower casing moves downward along the guide structure formed by multiple arc plates 2, the eddy current detection sensor 8 detects cracks in the lower casing so that the staff can maintain the damaged and cracked lower casing in time.

[0029] The working principle of the casing lowering auxiliary device provided by the utility model is as follows:

[0030] The mounting ring frame 1 is fixed to the wellhead by screws and the mounting ring frame 1 is kept coaxially arranged with the wellhead. Then, the lower casing is inserted into the oil well through the guide structure composed of multiple arc-shaped plates 2 by the lifting equipment. Since the inner plate wall of the arc-shaped plate 2 is provided with a rotatably connected steel ball 3, the lower casing can be quickly dropped into the oil well along the guide structure. In addition, since the sliding seat 42 is acted upon by the elastic force of the spring 44 on the guide rod 45, the lower casing is driven to remain stable during the lowering process of the lifting equipment, thereby reducing the lowering of the casing. When the lower casing deviates sideways during the lowering process of the lifting equipment, the lower casing abuts against the arc plate 2 in the sideways position, so the arc plate 2 drives the sliding seat 42 to slide backward along the guide rod 45 through the connecting bracket 43, so that the spring 44 is compressed, and when the abutting rod 7 abuts against the contact switch 61, the contact switch 61 activates the sound and light alarm 6. Therefore, the staff can quickly know the deviation amplitude when the lower casing is under, so as to make technical corrections in time to avoid installation accidents.

[0031] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0032] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A casing running auxiliary device, characterized in that: It comprises a mounting ring frame (1), on which a plurality of arc-shaped plates (2) distributed in an annular manner and arranged axially are mounted, and the inner arc surface of each of the arc-shaped plates (2) is embedded with a plurality of steel balls (3) that are evenly distributed and rotatably connected; A central link assembly (4) for elastically connecting the arc-shaped plate (2) is mounted on the mounting ring frame (1), and the central link assembly (4) comprises a mounting frame (41), the mounting frame (41) is fixedly mounted on the mounting ring frame (1), and an elastically connected sliding seat (42) is inserted into the mounting frame (41), a connecting bracket (43) is fixedly mounted on the sliding seat (42), and the connecting bracket (43) is fixedly connected to the bottom of the arc-shaped plate (2).

2. The casing running auxiliary device according to claim 1, characterized in that: Two guide rods (45) symmetrically distributed and arranged radially along the mounting ring frame (1) are fixedly mounted in the mounting frame (41), and the sliding seat (42) is sleeved on the two guide rods (45) and is slidably connected to the guide rods (45).

3. The casing running auxiliary device according to claim 2, characterized in that: A spring (44) is sleeved on each of the guide rods (45), one end of the spring (44) is fixedly connected to the inner wall of the mounting frame (41), and the other end of the spring (44) is fixedly connected to a plate surface of the sliding seat (42) that is away from the axis of the mounting ring frame (1).

4. The casing running auxiliary device according to claim 3, characterized in that: A plurality of circularly distributed arc plates (2) on the mounting ring frame (1) form a guide structure for the lower casing.

5. The casing running auxiliary device according to claim 1, characterized in that: A rear plate (5) is fixedly mounted on the rear side of the mounting frame (41), and an audible and visual alarm (6) and a contact-type switch (61) for turning the audible and visual alarm (6) on and off are fixedly mounted on the rear plate (5).

6. The casing running auxiliary device according to claim 5, characterized in that: An abutment rod (7) is fixedly mounted on a plate surface of the connecting bracket (43) that is away from the axis of the mounting ring frame (1), and the abutment rod (7) is arranged opposite to the contact sheet switch (61).

7. The casing running auxiliary device according to claim 1, characterized in that: An eddy current detection sensor (8) is fixedly mounted on the inner plate wall of each of the arc-shaped plates (2).

8. The casing running auxiliary device according to claim 1, characterized in that: Both side walls of the installation frame (41) are fixedly mounted with fixing ears (46), and the fixing ears (46) are fixedly mounted on the installation ring frame (1) by means of screws.

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