Mechanical graded cementing device

Abstract

The utility model relates to the technical field of cementing devices, and discloses a mechanical graded cementing device which comprises a first casing pipe and a third casing pipe, the top of the first casing pipe is fixedly connected with a second motor, and the output end of the second motor penetrates through the top of the first casing pipe and is fixedly connected with a mounting frame. The top of the mounting frame is rotationally connected with a driving gear, the outer portion of the mounting frame is rotationally connected with three cylindrical gears through a rotating shaft, and the bottom ends of the cylindrical gears are fixedly connected with a rotating disc. According to the well cementation device, the quantitative box, the first connecting pipe, the pump body, the second connecting pipe, the communicating pipe, the quantitative groove, the rubber piston and other structures are additionally arranged and used in cooperation, unnecessary waste can be avoided, and the cost of well cementation operation is saved. By means of quantitative discharging, it can be ensured that the needed well cementation effect is achieved, meanwhile, the using amount of cement is reduced to the maximum extent, and therefore the operation efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cementing devices, in particular to a mechanical graded cementing device. Background Art

[0002] In the completion operation of oil drilling projects, it is necessary to perform cementing construction on the completed wellbore to seal the interlayer and allow the crude oil in the oil layer to flow into the downhole oil production equipment. The inner tube method of cementing was originally used to solve the cementing construction problems of shallow wells and large-sized casings in large boreholes. It can prevent the occurrence of channeling and excessive uplift force in the casing during cementing and slurry replacement. Later, this technology was applied to the completion of special oil reservoirs or special wells, collectively referred to as inner tube completion. However, in order to reduce costs, the existing mechanical graded cementing device directly performs cementing operations and cannot discharge cement quantitatively as needed, resulting in problems such as waste of cement resources and unstable cementing effects. For this reason, technicians in this field have proposed a mechanical graded cementing device to solve the above problems. Utility Model Content

[0003] In order to make up for the above shortcomings, the utility model provides a mechanical staged cementing device, which aims to improve the problem that the cement discharged by the staged cementing device in the prior art cannot be quantitatively controlled, resulting in inaccurate dosage and waste of resources.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a mechanical graded cementing device, comprising a first sleeve and a third sleeve, the top of the first sleeve is fixedly connected to a second motor, the output end of the second motor passes through the top of the first sleeve and is fixedly connected to a mounting frame, the top of the mounting frame is rotatably connected to a driving gear, the outside of the mounting frame is rotatably connected to three cylindrical gears through a rotating shaft, the bottom end of the cylindrical gear is fixedly connected to a rotating disk, the outer eccentric part of the rotating disk is rotatably connected to a rotating rod, the outside of the rotating rod is fixedly connected to a plurality of mixing blades, the first sleeve is connected to the third sleeve through a connecting tube, and a quantitative component is installed on the right side of the top end of the third sleeve.

[0005] As a further description of the above technical solution:

[0006] The quantitative assembly includes a quantitative box, which is fixedly connected to the bottom of the third sleeve, a pump body is installed on the top of the quantitative box, the output end of the pump body is fixedly connected to the second connecting pipe, the input end of the pump body is fixedly connected to the first connecting pipe, a quantitative groove is opened on the right side of the interior of the quantitative box, a first motor is installed on the outside of the quantitative box, a threaded rod is fixedly connected to the output end of the first motor, the external thread of the threaded rod is connected to a threaded sleeve, two connecting rods are fixedly connected to the outside of the threaded sleeve, the other end of the connecting rod is fixedly connected to a rubber piston, and a connecting pipe is fixedly connected to one side of the bottom end of the quantitative box.

[0007] As a further description of the above technical solution:

[0008] The longitudinal section of the rubber piston is arranged to be square, and the outer surface of the rubber piston is in contact with the inner wall of the quantitative groove.

[0009] As a further description of the above technical solution:

[0010] One end of the threaded rod away from the first motor is fixedly connected with a fixing block.

[0011] As a further description of the above technical solution:

[0012] One end of the first connecting pipe is connected to the bottom of the third sleeve, one end of the second connecting pipe is connected to the top of the quantitative box, and a control valve is installed outside the second connecting pipe.

[0013] As a further description of the above technical solution:

[0014] The outer sides of the plurality of cylindrical gears are meshedly connected with the outer side of the driving gear.

[0015] As a further description of the above technical solution:

[0016] The driving gear is fixedly connected to the inner top wall of the first sleeve.

[0017] As a further description of the above technical solution:

[0018] The bottom end of the connecting pipe is fixedly connected with a second sleeve.

[0019] The utility model has the following beneficial effects:

[0020] In the utility model, the second motor, the driving gear, the cylindrical gear, the mounting frame, the mixing blades and other structures are used in coordination with each other, so that the various components in the cement slurry are fully mixed to ensure that the texture of the cement slurry is uniform. This helps to prevent the stratification of the cement slurry and improve the quality and success rate of cementing operations;

[0021] In the utility model, unnecessary waste can be avoided and the cost of cementing operation can be saved by adding a metering box, a first connecting pipe, a pump body, a second connecting pipe, a connecting pipe, a metering groove, a rubber piston and other structures to cooperate with each other. Through quantitative discharge, it can ensure that the required cementing effect is achieved while minimizing the amount of cement used, thereby improving the operation efficiency and reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional diagram of a mechanical staged cementing device proposed by the utility model;

[0023] Figure 2 This is a schematic diagram of the second casing structure of a mechanical staged cementing device proposed by the utility model;

[0024] Figure 3 This is a schematic diagram of the driving gear structure of a mechanical staged cementing device proposed by the utility model;

[0025] Figure 4 This is a cross-sectional view of a quantitative box of a mechanical graded cementing device proposed by the utility model.

[0026] Legend:

[0027] 1. Connecting pipe; 201. Dosing box; 202. First connecting pipe; 203. Pump body; 204. Second connecting pipe; 205. Connecting pipe; 206. Dosing slot; 207. Rubber piston; 208. First motor; 209. Threaded sleeve; 210. Threaded rod; 211. Connecting rod; 3. Control valve; 4. First sleeve; 501. Second motor; 502. Driving gear; 503. Cylindrical gear; 504. Mounting frame; 505. Mixing blade; 506. Rotating disk; 507. Rotating rod; 6. Fixed block; 7. Second sleeve; 8. Third sleeve. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Reference Figure 1 , Figure 2 and Figure 3The utility model provides an embodiment: a mechanical graded cementing device, comprising a first sleeve 4 and a third sleeve 8, the top of the first sleeve 4 is fixedly connected with a second motor 501, the output end of the second motor 501 passes through the top of the first sleeve 4 and is fixedly connected with a mounting frame 504, the top of the mounting frame 504 is rotatably connected with a driving gear 502, the outside of the mounting frame 504 is rotatably connected with three cylindrical gears 503 through a rotating shaft, the bottom end of the cylindrical gear 503 is fixedly connected with a rotating disk 506, the outer eccentric part of the rotating disk 506 is rotatably connected with a rotating rod 507, the outside of the rotating rod 507 is fixedly connected with a plurality of mixing blades 505, the first sleeve 4 is connected to the third sleeve 8 through a connecting pipe 1, and a quantitative component is installed on the right side of the top of the third sleeve 8.

[0030] Specifically, the second motor 501 is an existing mature technology product, powered by an external power supply, and the driving gear is movably connected to the top of the mounting frame 504 through a bearing, ensuring that the rotation of the mounting frame 504 will not affect the rotation of the driving gear 502. The number of cylindrical gears 503 is not limited to three, but can be one, two or more, which is changed according to actual needs.

[0031] By starting the second motor 501, the mounting frame 504 is rotated, and under the action of the cylindrical gear 503, the cylindrical gear 503 is driven to move, and then the cylindrical gear 503 is driven to rotate, thereby driving the rotating disk 506 to rotate synchronously, so that the rotating rod 507 rotates eccentrically along the outer surface of the rotating disk 506, and under the action of the mixing blade 505, the cement inside the first sleeve 4 is driven to be fully mixed, so as to prevent the cement from agglomerating and improve the fluidity and processing performance of the cement material.

[0032] Please see attached Figure 1 and attached Figure 4 The quantitative component includes a quantitative box 201, which is fixedly connected to the bottom of the third sleeve 8. A pump body 203 is installed on the top of the quantitative box 201. The output end of the pump body 203 is fixedly connected to the second connecting pipe 204, and the input end of the pump body 203 is fixedly connected to the first connecting pipe 202. A quantitative groove 206 is opened on the right side of the inside of the quantitative box 201. A first motor 208 is installed on the outside of the quantitative box 201. A threaded rod 210 is fixedly connected to the output end of the first motor 208. The external thread of the threaded rod 210 is connected to a threaded sleeve 209. Two connecting rods 211 are fixedly connected to the outside of the threaded sleeve 209. The other end of the connecting rod 211 is fixedly connected to a rubber piston 207. A connecting pipe 205 is fixedly connected to one side of the bottom end of the quantitative box 201;

[0033] Specifically, by starting the pump body 203, cement enters the interior of the quantitative groove 206 through the first connecting pipe 202 and the second connecting pipe 204. After the quantitative groove 206 is filled, the first motor 208 is started to drive the threaded sleeve 209 to rotate, and further make the threaded sleeve 209 move along the outer wall of the threaded rod 210, and under the traction of the connecting rod 211, drive the rubber piston 207 to move along the inner wall of the quantitative groove 206 until the cement is discharged through the connecting pipe 205, and the cracks on the building are repaired. Since the quantitative box 201 is made of transparent material, it is only necessary to change the initial position of the rubber piston 207 to control the discharge amount of cement, and the amount required according to the size of the crack to be repaired can be controlled, thereby achieving the benefit of saving cement and reducing the cost required for repairing the cracks.

[0034] Please see attached Figure 4 , the longitudinal section of the rubber piston 207 is set to be square, and the outer surface of the rubber piston 207 is in contact with the inner wall of the quantitative groove 206;

[0035] Specifically, the design of the fixing block 6 prevents the threaded sleeve 209 from being separated from the outer wall of the threaded rod 210, thereby ensuring the normal use of the device.

[0036] Please see attached Figure 4 , one end of the threaded rod 210 away from the first motor 208 is fixedly connected to a fixing block 6;

[0037] Specifically, the design of the fixing block 6 prevents the threaded sleeve 209 from being separated from the outer wall of the threaded rod 210, thereby ensuring the normal use of the device.

[0038] Please see attached Figure 1 and attached Figure 2 One end of the first connecting pipe 202 is connected to the bottom of the third sleeve 8, one end of the second connecting pipe 204 is connected to the top of the quantitative box 201, and the control valve 3 is installed outside the second connecting pipe 204;

[0039] Specifically, the cement mixed inside the third sleeve 8 enters into the quantitative tank 206 through the first connecting pipe 202 and the second connecting pipe 204 .

[0040] Please see attached Figure 3 , the outer sides of the plurality of cylindrical gears 503 are meshedly connected with the outer side of the driving gear 502;

[0041] Specifically, since the cylindrical gear 503 and the driving gear 502 are meshed with each other, the cylindrical gear 503 is driven to move along the outer surface of the driving gear 502 .

[0042] Please see attached Figure 3, the driving gear 502 is fixedly connected to the inner top wall of the first sleeve 4;

[0043] Specifically, the driving gear 502 is fixed and limited to prevent it from rotating, thereby ensuring that the mounting frame 504 does not affect the normal use of the driving disk 502 during the rotation process.

[0044] Please see attached Figure 1 and attached Figure 2 The bottom end of the connecting pipe 205 is fixedly connected with a second sleeve 7.

[0045] Specifically, it is convenient to discharge cement through the second casing 7, so as to facilitate the subsequent cementing operation.

[0046] Working principle: When the device is used, firstly, the second motor 501 is started to rotate the mounting frame 504. Since the cylindrical gear 503 and the driving gear 502 are meshed with each other, the cylindrical gear 503 is driven to move along the outer surface of the driving gear 502, and then the cylindrical gear 503 is driven to rotate, thus driving the rotating disk 506 to rotate synchronously, so that the rotating rod 507 rotates eccentrically along the outer surface of the rotating disk 506, and under the action of the mixing blade 505, the cement inside the first sleeve 4 is driven to be fully mixed, so as to prevent the cement from agglomerating and improve the fluidity and processing performance of the cement material;

[0047] In addition, by starting the pump body 203, the cement mixed inside the first casing 4 enters the interior of the quantitative tank 206 through the first connecting pipe 202 and the second connecting pipe 204. After the quantitative tank 206 is filled, the control valve 3 outside the second connecting pipe 204 is closed, and the control valve 3 outside the connecting pipe 205 is opened. At this time, the first motor 208 is started to drive the threaded sleeve 209 to rotate, and further the threaded sleeve 209 moves along the outer wall of the threaded rod 210, and under the traction of the connecting rod 211, the rubber piston 207 is driven to move along the inner wall of the quantitative tank 206 until the cement is discharged through the connecting pipe 205 to repair the cracks on the building. Since the quantitative box 201 is made of transparent material, it is only necessary to change the initial position of the rubber piston 207 to control the discharge amount of cement, which can avoid unnecessary waste and save the cost of cementing operations. Through quantitative discharge, it can ensure that the required cementing effect is achieved while minimizing the amount of cement used, thereby improving operation efficiency and reducing costs.

[0048] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanical staged cementing device, comprising a first casing (4) and a third casing (8), characterized in that: A second motor (501) is fixedly connected to the top of the first sleeve (4); an output end of the second motor (501) passes through the top of the first sleeve (4) and is fixedly connected to a mounting frame (504); a driving gear (502) is rotatably connected to the top of the mounting frame (504); three cylindrical gears (503) are rotatably connected to the outside of the mounting frame (504) via a rotating shaft; a rotating disk (506) is fixedly connected to the bottom end of the cylindrical gear (503); a rotating rod (507) is rotatably connected to the outside eccentric portion of the rotating disk (506); a plurality of mixing blades (505) are fixedly connected to the outside of the rotating rod (507); the first sleeve (4) is connected to the third sleeve (8) via a connecting tube (1); a quantitative component is installed on the right side of the top end of the third sleeve (8).

2. A mechanical staged cementing device according to claim 1, characterized in that: The quantitative assembly comprises a quantitative box (201), the quantitative box (201) being fixedly connected to the bottom of the third sleeve (8), a pump body (203) being installed on the top of the quantitative box (201), an output end of the pump body (203) being fixedly connected to a second connecting pipe (204), an input end of the pump body (203) being fixedly connected to a first connecting pipe (202), a quantitative groove (206) being provided on the right side of the interior of the quantitative box (201), a first motor (208) being installed on the outside of the quantitative box (201), a threaded rod (210) being fixedly connected to the output end of the first motor (208), a threaded sleeve (209) being threadedly connected to the outside of the threaded sleeve (209), two connecting rods (211) being fixedly connected to the outside of the threaded sleeve (209), the other end of the connecting rod (211) being fixedly connected to a rubber piston (207), and a connecting pipe (205) being fixedly connected to one side of the bottom end of the quantitative box (201).

3. A mechanical staged cementing device according to claim 2, characterized in that: The longitudinal section of the rubber piston (207) is arranged to be square, and the outer surface of the rubber piston (207) fits the inner wall of the quantitative groove (206).

4. A mechanical staged cementing device according to claim 2, characterized in that: One end of the threaded rod (210) away from the first motor (208) is fixedly connected to a fixing block (6).

5. A mechanical staged cementing device according to claim 2, characterized in that: One end of the first connecting pipe (202) is connected to the bottom of the third sleeve (8), one end of the second connecting pipe (204) is connected to the top of the quantitative box (201), and a control valve (3) is installed outside the second connecting pipe (204).

6. A mechanical staged cementing device according to claim 1, characterized in that: The outer sides of the plurality of cylindrical gears (503) are all meshedly connected with the outer side of the driving gear (502).

7. A mechanical staged cementing device according to claim 1, characterized in that: The driving gear (502) is fixedly connected to the inner top wall of the first sleeve (4).

8. A mechanical staged cementing device according to claim 2, characterized in that: The bottom end of the connecting pipe (205) is fixedly connected to a second sleeve (7).

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