Drilling and workover oil casing centralizing device

Abstract

The utility model relates to the technical field of oil drilling and workover, in particular to a drilling and workover oil casing centralizing device which comprises a derrick, a connecting mechanism is installed on the side wall of the derrick, control mechanisms are installed on the derrick and the connecting mechanism, and a clamping mechanism is installed at the end, away from the derrick, of the connecting mechanism. The connecting mechanism comprises a first connecting arm, one end of the first connecting arm is movably connected with a second connecting arm, and the other end of the second connecting arm is movably connected with a third connecting arm; the clamping mechanism comprises a fixing plate, the interior of the fixing plate is movably connected with two flexible arc plates; the control mechanism comprises a first cylinder, a second cylinder, a third cylinder and a fourth cylinder. The two-position three-way air switch is powered by an air source, stretches out when used and retracts when not used, an operator only needs to remotely operate the two-position three-way air switch on a drill floor, safety, high efficiency and assistance are achieved, underground complexity is reduced, and production continuity of enterprises is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of oil drilling and workover, in particular to an oil casing centralizer for downhole drilling and workover. Background Technique

[0002] All along, after the completion of the drilling and workover operation, the last step is to run the casing. In the construction applications over the years, the equipment is designed with an independently installed casing centralizing platform. When running the casing, workers operate at high altitude to cooperate with the driller to suspend and centralize the casing with the traveling block. When the male thread of the casing is aligned with the female thread and enters the female thread boring hole, there is a relatively large suspension weight. The operators on the centralizing platform cannot move it. Moreover, due to the heavy weight and large outer diameter of the casing, the workers can only centralize the casing back and forth when it is in a suspended state, and cannot effectively centralize it left and right. In recent years, with the continuous increase of the drilling depth, the diameter of the surface casing is larger, and the overall drilling equipment is wider. The workers at high altitude cannot effectively centralize the casing, resulting in frequent occurrences of casing threading misalignment events. In addition, the labor intensity of the workers is high and the work efficiency is low, leading to downhole complexity and great safety risks. According to statistics, the number of casing threading misalignment events has been increasing in recent years, causing large losses. The occurrence of these events has to consider the research and application of equipment technology. In order to reduce safety risks and labor intensity and improve work efficiency, an oil casing centralizer for downhole drilling and workover is provided. Content of the Utility Model

[0003] The purpose of the utility model is to solve the defects existing in the prior art, and a kind of oil casing centralizer for downhole drilling and workover is proposed.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme: an oil casing centralizer for downhole drilling and workover, including a derrick, a connecting mechanism is installed on the side wall of the derrick, control mechanisms are installed on both the derrick and the connecting mechanism, and a clamping mechanism is installed at one end of the connecting mechanism away from the derrick;

[0005] The connecting mechanism includes a first connecting arm, one end of the first connecting arm is movably connected with a second connecting arm, and the other end of the second connecting arm is movably connected with a third connecting arm;

[0006] The clamping mechanism includes a fixing plate, and two flexible arc plates are movably connected inside the fixing plate;

[0007] The control mechanism includes a first cylinder, a second cylinder, a third cylinder, and a fourth cylinder. One end of the first cylinder is movably connected to the upper surface of the first connecting arm. One end of the second cylinder is movably connected to the lower surface of the first connecting arm. The other end of the second cylinder is movably connected to the lower surface of the second connecting arm. One end of the third cylinder is movably connected to the upper surface of the second connecting arm. The other end of the third cylinder is movably connected to the upper surface of the third connecting arm. The number of the fourth cylinders is two, and the two fourth cylinders are respectively installed on the left and right side walls of the third connecting arm. One end of the two fourth cylinders away from the third connecting arm is respectively movably connected to the outer surfaces of the two flexural arc plates.

[0008] As a further description of the above technical solution:

[0009] The derrick includes a derrick body. A first fixed seat is fixedly connected to the side surface of the derrick body. A first connecting frame is fixedly connected to the surface of the first fixed seat. The first connecting frame is movably connected to the other end of the first connecting arm.

[0010] As a further description of the above technical solution:

[0011] A second fixed seat is fixedly connected to the side surface of the derrick body. The second fixed seat is located above the first fixed seat. A second connecting frame is fixedly connected to the surface of the second fixed seat. The second connecting frame is movably connected to the other end of the first cylinder.

[0012] As a further description of the above technical solution:

[0013] An A1 air inlet hole is fixedly connected to the surface of the first cylinder. An A2 air inlet hole is fixedly connected to the surface of the first cylinder. The A2 air inlet hole is located below the A1 air inlet hole.

[0014] As a further description of the above technical solution:

[0015] A B1 air inlet hole is fixedly connected to the surface of the second cylinder. A B2 air inlet hole is fixedly connected to the surface of the second cylinder. The B2 air inlet hole is located on the right side of the B1 air inlet hole.

[0016] As a further description of the above technical solution:

[0017] A C1 air inlet hole is fixedly connected to the surface of the third cylinder. A C2 air inlet hole is fixedly connected to the surface of the third cylinder. The C2 air inlet hole is located on the right side of the C1 air inlet hole.

[0018] As a further description of the above technical solution:

[0019] The surface of the fourth cylinder is fixedly connected with a D1 air inlet hole, and the surface of the fourth cylinder is fixedly connected with a D2 air inlet hole. The D2 air inlet hole is located on the side of the D1 air inlet hole away from the third connecting arm.

[0020] As a further description of the above technical solution:

[0021] A clamping groove is formed on the inner surface of the flexible arc plate. A single-head pin is installed inside the clamping groove. The number of single-head pins is multiple. A spring is sleeved on the outer surface of the single-head pin, and a bearing is sleeved on the outer surface of the single-head pin. The bearing is located below the spring.

[0022] The utility model has the following beneficial effects:

[0023] Compared with the prior art, the downhole oil casing centralizer for drilling and workover uses air source as power, extends when in use and retracts when not in use. The operator only needs to remotely operate a two-position three-way air switch on the drill floor to achieve safety, high efficiency, and assistance, reduce downhole complexity, and ensure the continuity of enterprise production. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. 1 is a schematic diagram of the overall structure of a downhole oil casing centralizer for drilling and workover proposed by the utility model;

[0025] Figure 2 FIG. 2 is a schematic diagram of the clamping mechanism of a downhole oil casing centralizer for drilling and workover proposed by the utility model;

[0026] Figure 3 FIG. 3 is a Figure 2 magnified view of the structure at A of a downhole oil casing centralizer for drilling and workover proposed by the utility model;

[0027] Figure 4 FIG. 4 is a Figure 2 magnified view of the structure at B of a downhole oil casing centralizer for drilling and workover proposed by the utility model;

[0028] Figure 5 FIG. 5 is a schematic diagram of the gas circuit of a downhole oil casing centralizer for drilling and workover proposed by the utility model.

[0029] LEGEND DESCRIPTION:

[0030] 1. Derrick; 101. Derrick body; 102. First fixed seat; 103. First connecting frame; 104. Second fixed seat; 105. Second connecting frame; 2. Connecting mechanism; 201. First connecting arm; 202. Second connecting arm; 203. Third connecting arm; 3. Control mechanism; 301. First cylinder; 302. A1 gas delivery hole; 303. A2 gas delivery hole; 304. Second cylinder; 305. B1 gas delivery hole; 306. B2 Air supply hole; 307, third air cylinder; 308, C1 air supply hole; 309, C2 air supply hole; 310, fourth air cylinder; 311, D1 air supply hole; 312, D2 air supply hole; 4, clamping mechanism; 401, fixing plate; 402, flexure arc plate; 403, slot; 404, single-head pin; 405, spring; 406, bearing; 5, air source; 6, air source switch; 7, first pressure regulating valve; 8, second pressure regulating valve; 9, two-position three-way air switch. DETAILED DESCRIPTION

[0031] Reference Figures 1-5 The utility model provides a drilling and repairing downhole oil casing straightening device: comprising a derrick 1, a connecting mechanism 2 is installed on the side wall of the derrick 1, a control mechanism 3 is installed on the derrick 1 and the connecting mechanism 2, and a clamping mechanism 4 is installed on the end of the connecting mechanism 2 away from the derrick 1, and the connecting mechanism 2 cooperates with the control mechanism 3 to control the clamping mechanism 4 to move forward and backward and clamp the casing, so as to control the movement of the casing and straighten the casing;

[0032] The connecting mechanism 2 includes a first connecting arm 201, one end of which is movably connected to a second connecting arm 202, the first connecting arm 201 is movably connected to the second connecting arm 202 via a shear pin, the other end of the second connecting arm 202 is movably connected to a third connecting arm 203, the second connecting arm 202 is movably connected to the third connecting arm 203 via a shear pin;

[0033] The clamping mechanism 4 includes a fixed plate 401, the outer surface of which is fixedly connected to the right end of the third connecting arm 203, and the fixed plate 401 is movably connected with a flexible arc plate 402 inside, and the number of the flexible arc plates 402 is two, and the two flexible arc plates 402 can rotate on the left and right sides of the fixed plate 401. The two flexible arc plates 402 clamp the sleeve, adjust the position of the sleeve, and straighten the sleeve. When the sleeve needs to move backward, according to the arc design, after the sleeve enters, the end port of the arc plate is close to each other under the action of the cylinder to prevent the sleeve from sliding out when the pneumatic arm is retracted;

[0034] The control mechanism 3 includes a first cylinder 301, a second cylinder 304, a third cylinder 307, and a fourth cylinder 310. One end of the first cylinder 301 is movably connected to the upper surface of the first connecting arm 201, so that the first cylinder 301 can control the movement of the first connecting arm 201. One end of the second cylinder 304 is movably connected to the lower surface of the first connecting arm 201, and the other end of the second cylinder 304 is movably connected to the lower surface of the second connecting arm 202, so that the second cylinder 304 can control the movement of the second connecting arm 202. One end of the third cylinder 307 is movably connected to the upper surface of the second connecting arm 202, and the other end of the third cylinder 307 is movably connected to the upper surface of the third connecting arm 203, so that the third cylinder 307 can control the movement of the third connecting arm 203. The number of the fourth cylinders 310 is two, and the two fourth cylinders 310 are respectively installed on the left and right side walls of the third connecting arm 203. The ends of the two fourth cylinders 310 far away from the third connecting arm 203 are respectively movably connected to the outer surfaces of the two flexible arc plates 402, so that the two fourth cylinders 310 can respectively control the rotation of the two flexible arc plates 402 inside the fixed plate 401. When one side arc plate is displaced, it does not affect the other side arc plate, realizing the independent displacement of the arc plates and the specification of the arc plate frame can be manually adjusted to meet various specifications of sleeves.

[0035] The derrick 1 includes a derrick main body 101. A first fixed seat 102 is fixedly connected to the side surface of the derrick main body 101. A first connecting frame 103 is fixedly connected to the surface of the first fixed seat 102. The first connecting frame 103 is movably connected to the other end of the first connecting arm 201, which is convenient for installing the first connecting arm 201 onto the derrick main body 101. A second fixed seat 104 is fixedly connected to the side surface of the derrick main body 101. The second fixed seat 104 is located above the first fixed seat 102. A second connecting frame 105 is fixedly connected to the surface of the second fixed seat 104. The second connecting frame 105 is movably connected to the other end of the first cylinder 301, which is convenient for installing the first cylinder 301 onto the derrick main body 101.

[0036] When in use, the straightening device supplies air to each cylinder through the air source 5. An air source switch 6 is installed at the output end of the air source 5 through a pipeline, which is the main switch for controlling the gas flow in the pipeline. A first pressure regulating valve 7 is installed through the pipeline of the air source switch 6, which can adjust the gas pressure in the pipeline. A plurality of second pressure regulating valves 8 and two-position three-way air switches 9 are installed through the pipeline of the first pressure regulating valve 7. The design of the two-position three-way air switch 9 enables the operator to manually operate the handle to the left or right position to control the expansion and contraction of the cylinder. When it remains unchanged, no air enters or exits in the middle position. Two connecting pipelines are installed inside each two-position three-way air switch 9. One end of the connecting pipeline far away from the two-position three-way air switch 9 is respectively connected to the air inlet holes on each cylinder. The number of two-position three-way air switches 9 is 5 in total. The No. 1 two-position three-way air switch supplies air to the first cylinder 301, the No. 2 two-position three-way air switch supplies air to the second cylinder 304, the No. 3 two-position three-way air switch supplies air to the third cylinder, and the No. 4 and No. 5 two-position three-way air switches supply air to the two fourth cylinders 310 respectively. The No. 4 and No. 5 two-position three-way air switches are designed with independent pressure regulating valves, which can be used to flexibly and slowly control the speed of the cylinder piston according to the deviation of the casing when the left and right displacement of the casing needs to be adjusted, so as to achieve smooth displacement. By supplying air through the air source 5 and adjusting the switch of the two-position three-way air switch 9, the working state of each cylinder can be controlled.

[0037] The surface of the first cylinder 301 is fixedly connected with an A1 air inlet hole 302, and the surface of the first cylinder 301 is fixedly connected with an A2 air outlet hole 303. The A2 air outlet hole 303 is located below the A1 air inlet hole 302. Operate the No. 1 two-position three-way air switch to connect the main air to the first cylinder 301, so that the air flow enters from the A1 air inlet hole 302 and discharges from the A2 air outlet hole 303. The piston rod of the first cylinder 301 moves, pushing the first connecting arm 201 to extend. The surface of the second cylinder 304 is fixedly connected with a B1 air inlet hole 305, and the surface of the second cylinder 304 is fixedly connected with a B2 air outlet hole 306. The B2 air outlet hole 306 is located on the right side of the B1 air inlet hole 305. Operate the No. 2 two-position three-way air switch to connect the main air to the second cylinder 304, so that the air flow enters from the B1 air inlet hole 305 and discharges from the B2 air outlet hole 306. The piston rod of the second cylinder 304 moves, pushing the second connecting arm 202 to extend. The surface of the third cylinder 307 is fixedly connected with a C1 air inlet hole 308, and the surface of the third cylinder 307 is fixedly connected with a C2 air outlet hole 309. The C2 air outlet hole 309 is located on the right side of the C1 air inlet hole 308. Operate the No. 3 two-position three-way air switch to connect the main air to the third cylinder 307, and the air flow enters from the C1 air inlet hole 308 and discharges from the C2 air outlet hole 309. The piston rod of the third cylinder 307 moves, pushing the third connecting arm 203 to extend. The surface of the fourth cylinder 310 is fixedly connected with a D1 air inlet hole 311, and the surface of the fourth cylinder 310 is fixedly connected with a D2 air outlet hole 312. The D2 air outlet hole 312 is located on the side of the D1 air inlet hole 311 away from the third connecting arm 203. Operate the No. 4 and No. 5 two-position three-way air switches to connect the main air to the air inlet holes on the two fourth cylinders 310, so that the air flow enters from the D1 air inlet hole 311 and discharges from the D2 air outlet hole 312. The piston rod of the fourth cylinder 310 moves to adjust the deflection angle of the flexible arc plate 402.

[0038] A clamping groove 403 is formed on the inner surface of the flexible arc plate 402. A single-head pin 404 is installed inside the clamping groove 403. The number of single-head pins 404 is multiple. A spring 405 is sleeved on the outer surface of the single-head pin 404, and a bearing 406 is sleeved on the outer surface of the single-head pin 404. The bearing 406 is located below the spring 405. When the male casing thread is connected with the female casing thread in the well by forward rotation, there is an axial downward traction force. A spring 405 is designed at the lower end of the bearing 406. When the casing rotates forward and moves downward, the spring is compressed. When released, the bearing 406 resets. The flexible arc plate 402 is processed into an I-shaped steel structure, with a length of 380 mm, a height of 60 mm, and a width of 45 mm, and a bearing is designed in the middle.

[0039] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A downhole oil casing straightening device for drilling and repairing, comprising a derrick (1), characterized in that: A connecting mechanism (2) is installed on the side wall of the derrick (1), a control mechanism (3) is installed on both the derrick (1) and the connecting mechanism (2), and a clamping mechanism (4) is installed on one end of the connecting mechanism (2) away from the derrick (1); The connecting mechanism (2) comprises a first connecting arm (201), one end of the first connecting arm (201) being movably connected to the second connecting arm (202), and the other end of the second connecting arm (202) being movably connected to the third connecting arm (203); The clamping mechanism (4) comprises a fixed plate (401), the fixed plate (401) is internally movably connected with a flexible arc plate (402), and the number of the flexible arc plates (402) is two; The control mechanism (3) comprises a first cylinder (301), a second cylinder (304), a third cylinder (307), and a fourth cylinder (310), wherein one end of the first cylinder (301) is movably connected to the upper surface of the first connecting arm (201), one end of the second cylinder (304) is movably connected to the lower surface of the first connecting arm (201), the other end of the second cylinder (304) is movably connected to the lower surface of the second connecting arm (202), one end of the third cylinder (307) is movably connected to the upper surface of the second connecting arm (202), the other end of the third cylinder (307) is movably connected to the upper surface of the third connecting arm (203), and the number of the fourth cylinders (310) is two, and the two fourth cylinders (310) are respectively mounted on the left and right side walls of the third connecting arm (203), and the ends of the two fourth cylinders (310) away from the third connecting arm (203) are respectively movably connected to the outer surfaces of the two flexure arc plates (402).

2. The downhole oil casing straightening device according to claim 1, characterized in that: The derrick (1) comprises a derrick body (101), a first fixing seat (102) being fixedly connected to a side surface of the derrick body (101), a first connecting frame (103) being fixedly connected to a surface of the first fixing seat (102), and the first connecting frame (103) being movably connected to the other end of a first connecting arm (201).

3. The downhole oil casing straightening device according to claim 2, characterized in that: A second fixing seat (104) is fixedly connected to the side of the derrick body (101), the second fixing seat (104) is located above the first fixing seat (102), a second connecting frame (105) is fixedly connected to the surface of the second fixing seat (104), and the second connecting frame (105) is movably connected to the other end of the first cylinder (301).

4. The downhole oil casing straightening device according to claim 1, characterized in that: An A1 gas supply hole (302) is fixedly connected to the surface of the first cylinder (301), and an A2 gas supply hole (303) is fixedly connected to the surface of the first cylinder (301), wherein the A2 gas supply hole (303) is located below the A1 gas supply hole (302).

5. The downhole oil casing straightening device for drilling and repairing according to claim 1, characterized in that: A B1 gas supply hole (305) is fixedly connected to the surface of the second cylinder (304), and a B2 gas supply hole (306) is fixedly connected to the surface of the second cylinder (304), wherein the B2 gas supply hole (306) is located on the right side of the B1 gas supply hole (305).

6. The downhole oil casing straightening device according to claim 1, characterized in that: The surface of the third cylinder (307) is fixedly connected to a C1 gas supply hole (308), and the surface of the third cylinder (307) is fixedly connected to a C2 gas supply hole (309), wherein the C2 gas supply hole (309) is located on the right side of the C1 gas supply hole (308).

7. The downhole oil casing straightening device for drilling and repairing according to claim 1, characterized in that: A D1 gas supply hole (311) is fixedly connected to the surface of the fourth cylinder (310), and a D2 gas supply hole (312) is fixedly connected to the surface of the fourth cylinder (310), wherein the D2 gas supply hole (312) is located on a side of the D1 gas supply hole (311) away from the third connecting arm (203).

8. The downhole oil casing straightening device for drilling and repairing according to claim 1, characterized in that: A slot (403) is provided on the inner surface of the flexure arc plate (402), a single-head pin (404) is installed inside the slot (403), a plurality of single-head pins (404) are provided, a spring (405) is sleeved on the outer surface of the single-head pin (404), a bearing (406) is sleeved on the outer surface of the single-head pin (404), and the bearing (406) is located below the spring (405).

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