Adjustable rotary staged cement injector

Abstract

This utility model relates to the field of cement injection equipment technology, and discloses an adjustable rotary staged cement injection equipment, including an inlet pipe, a fixed pipe, a rotating pipe, a rotating connecting pipe, a drive integrated device, an auxiliary drive device, a curved metal pressure pipe, and a mud injection pipe integrated device. One end of the inlet pipe is connected to the cement tank, and the other end of the inlet pipe is connected to the top of the fixed pipe. The bottom end of the fixed pipe is connected to the top of the rotating pipe through the rotating connecting pipe. The drive integrated device is fixedly connected to the outer circumference of the fixed pipe, and the drive end of the drive integrated device is connected to the rotating pipe. The bottom end of the rotating pipe is connected to the top of the mud injection pipe integrated device through the curved metal pressure pipe. The outer circumference of the rotating pipe is connected to the auxiliary drive device, and the drive end of the auxiliary drive device is connected to the mud injection pipe integrated device. This utility model uses the drive integrated device to drive the rotating pipe to rotate, and the auxiliary drive device to adjust the mud injection pipe integrated device, to achieve uniform cement injection.

Description

Technical Field

[0001] This utility model relates to the field of cement injection equipment technology, specifically an adjustable rotary staged cement injection equipment. Background Technology

[0002] In oil drilling engineering, cementing is a crucial step in ensuring the integrity and stability of the wellbore, and cementing is the core step in the cementing process. The uniformity of cement injection directly affects the cementing quality, which in turn affects subsequent drilling operations and oil and gas extraction efficiency.

[0003] Traditional cementing methods have several problems. Firstly, due to the flow characteristics of cement slurry and the fixed layout of the injection pipes, it is difficult to achieve uniform cement distribution within the wellbore. Especially in large-diameter wellbores or multi-stage cementing operations, cement slurry can easily accumulate in localized areas or be insufficiently injected, resulting in uneven cement sheath thickness after cementing, which reduces the wellbore's sealing and compressive strength. This not only increases the risk of downhole accidents, such as wellbore collapse and casing deformation, but also affects normal oil and gas extraction and reduces production efficiency.

[0004] On the other hand, most existing mud injection pipelines are fixed structures, lacking adjustability. When faced with different well conditions and cementing requirements, they cannot flexibly adjust the direction and flow rate of mud injection according to the actual situation. For example, under complex geological conditions, the shape and size of the wellbore may vary significantly, and fixed mud injection pipelines cannot adapt to these changes, resulting in unsatisfactory cement injection effects. Furthermore, with the continuous development of drilling technology, the requirements for cementing quality are becoming increasingly stringent.

[0005] To address the aforementioned issues, we propose an adjustable rotary staged cement injector. Utility Model Content

[0006] The purpose of this invention is to provide an adjustable rotary graded cement injector to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an adjustable rotary graded cement injector, comprising an inlet pipe, a fixed pipe, a rotating pipe, a rotating connecting pipe, a drive integrated device, an auxiliary drive device, a bent metal pressure pipe, and a cement injection pipe integrated device; One end of the inlet pipe is connected to a cement tank; the other end of the inlet pipe is connected to the top of the fixed pipe; the bottom end of the fixed pipe is connected to the top of the rotating pipe through the rotating connecting pipe; the drive integrated device is fixedly connected to the outer circumferential wall of the fixed pipe; the drive end of the drive integrated device is connected to the rotating pipe; the bottom end of the rotating pipe is connected to the top of the mud injection pipe integrated device through the bent metal pressure pipe; the outer circumferential wall of the rotating pipe is connected to the auxiliary drive device; the drive end of the auxiliary drive device is connected to the mud injection pipe integrated device.

[0008] Preferably, the inlet pipe includes an interface pipe and a transfer pipe; one end of the interface pipe is connected to the cement tank; the other end of the interface pipe is connected to one end of the transfer pipe; and the other end of the transfer pipe is connected to the top of the fixed pipe.

[0009] Preferably, the drive integration device includes a mounting box and a drive motor; The fixing box is fixedly sleeved on the outer circumference of the fixing pipe; the drive motor is detachably connected to the inner side wall of the fixing box; the drive end of the drive motor is connected to the rotating pipe.

[0010] Preferably, the drive integration device further includes a drive gear; the drive end of the drive motor is connected to the drive gear via a spline; a gear ring is sleeved on the outer circumference of the rotating pipe; the drive gear meshes with the gear ring.

[0011] Preferably, an auxiliary mounting bracket is fixedly connected to the outer circumferential wall of the rotating pipe; an auxiliary driving device is connected to the top surface of the auxiliary mounting bracket.

[0012] Preferably, the auxiliary drive device includes a geared motor and a connecting rod; the bottom surface of the geared motor is connected to the top surface of the auxiliary mounting bracket; the drive end of the geared motor is connected to one end of the connecting rod via a spline; the other end of the connecting rod is rotatably connected to the side wall of the mud injection pipe integrated device.

[0013] Preferably, the mud injection pipeline integrated device includes a mud injection nozzle, a solenoid butterfly valve, and a connecting pipe; the top end of the connecting pipe is connected to the curved metal pressure pipe; the bottom end of the connecting pipe is connected to the top end of the mud injection nozzle through the solenoid butterfly valve.

[0014] Preferably, the curved metal pressure pipe is a metal bellows.

[0015] Compared with the prior art, the beneficial effects of this utility model are: Uniform cement injection: By driving the integrated device to rotate the rotating pipe and by adjusting the mud injection pipe integrated device with the auxiliary drive device, cement can be injected into the wellbore in multiple directions and uniformly, thereby improving the cementing quality.

[0016] Highly adjustable: The design of each component allows the cement injector to be flexibly adjusted according to different well conditions and cement injection requirements, making it highly adaptable. Attached Figure Description

[0017] Figure 1 This is a schematic front view of the structure of this utility model; Figure 2 This is a front view schematic diagram of the cross-sectional part of the structure of this utility model.

[0018] In the diagram: 1-Inlet pipe, 11-Interface pipe, 12-Transfer pipe, 2-Fixed pipe, 3-Rotating pipe, 31-Gear ring, 32-Auxiliary mounting bracket, 4-Rotating connecting pipe, 5-Drive integrated device, 51-Fixed box, 52-Drive motor, 53-Drive gear, 7-Auxiliary drive device, 71-Reduction motor, 72-Connecting rod, 8-Bent metal pressure pipe, 9-Injection pipe integrated device, 91-Injection nozzle, 92-Solenoid butterfly valve, 93-Connecting pipe. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1 , Figure 2 This utility model provides a technical solution: an adjustable rotary graded cement injector, including an inlet pipe 1, a fixed pipe 2, a rotating pipe 3, a rotating connecting pipe 4, a drive integrated device 5, an auxiliary drive device 7, a curved metal pressure pipe 8, and a mud injection pipe integrated device 9. One end of the inlet pipe 1 is connected to a cement tank; it should be noted that a pump body is also connected to provide suction. The other end of the inlet pipe 1 is connected to the top of the fixed pipe 2, introducing cement slurry into this utility model. The fixed pipe 2 serves as a support and guide; its bottom end is connected to the top of the rotating pipe 3 via the rotating connecting pipe 4, allowing the rotating pipe 3 to rotate relative to the fixed pipe 2 under the action of the drive integrated device 5. The bottom end of the rotating pipe 3 is connected to the top of the mud injection pipe integrated device 9 via the curved metal pressure pipe 8, delivering cement slurry to the mud injection pipe integrated device 9. The auxiliary drive device 7 is connected to the outer circumferential wall of the rotating pipe 3, and its driving end is connected to the mud injection pipe integrated device 9, assisting in adjusting the mud injection direction.

[0021] The rotating connecting pipe 4 uses a rotary joint. Inside the rotary joint, the rotating components are supported by bearings, and sealing rings such as rubber O-rings or PTFE sealing rings are used to achieve a seal between the moving and stationary parts. When the pipeline needs to rotate, the bearings allow the inner or outer ring to rotate freely, while the sealing rings ensure that media such as gas, liquid, or slurry do not leak.

[0022] The inlet pipe 1 includes an interface pipe 11 and a transfer pipe 12. One end of the interface pipe 11 is connected to a cement tank for drawing cement slurry from the cement tank; the other end of the interface pipe 11 is connected to one end of the transfer pipe 12, and the other end of the transfer pipe 12 is connected to the top of the fixed pipe 2. This segmented design facilitates installation and maintenance, and allows for the selection of different specifications and materials of the interface pipe 11 and the transfer pipe 12 to accommodate different cement tanks and the fixed pipe 2.

[0023] The drive integration device 5 includes a fixed box 51, a drive motor 52, and a drive gear 53. A gear ring 31 is fitted onto the outer circumferential wall of the rotating pipe 3. The fixed box 51 is fixedly fitted onto the outer circumferential wall of the fixed pipe 2, providing a stable installation position for the drive motor 52. The drive motor 52 is detachably connected to the inner wall of the fixed box 51 for easy maintenance and replacement when needed. When the drive motor 52 is working, the drive end of the drive motor 52 is connected to the drive gear 53 via a spline, and the drive gear 53 meshes with the gear ring 31. Through the meshing transmission between the drive gear 53 and the gear ring 31, the rotation speed and angle of the rotating pipe 3 can be controlled more precisely, improving the uniformity of cement injection, and driving the rotating pipe 3 to rotate around the fixed pipe 2.

[0024] An auxiliary mounting bracket 32 ​​is fixedly connected to the outer circumferential wall of the rotating pipe 3, and the auxiliary driving device 7 is connected to the top surface of the auxiliary mounting bracket 32. The auxiliary driving device 7 includes a reduction motor 71 and a connecting rod 72. The bottom surface of the reduction motor 71 is connected to the top surface of the auxiliary mounting bracket 32, and the driving end of the reduction motor 71 is connected to one end of the connecting rod 72 via a spline. The other end of the connecting rod 72 is rotatably connected to the side wall of the mud injection pipe integrated device 9. The reduction motor 71 can provide a stable driving force, which drives the mud injection pipe integrated device 9 to make small-angle adjustments through the connecting rod 72, further optimizing the mud injection direction.

[0025] The integrated mud injection pipeline device 9 includes a mud injection nozzle 91, an electromagnetic butterfly valve 92, and a connecting pipe 93. The top end of the connecting pipe 93 connects to the curved metal pressure pipe 8, introducing cement slurry into the integrated mud injection pipeline device 9; the bottom end of the connecting pipe 93 connects to the top end of the mud injection nozzle 91 via the electromagnetic butterfly valve 92. The electromagnetic butterfly valve 92 can precisely control the flow rate of the cement slurry, and by adjusting the opening degree of the electromagnetic butterfly valve 92, the mud injection speed can be adjusted according to different cement injection requirements. The design of the mud injection nozzle 91 allows the cement slurry to be injected into the wellbore at a suitable angle and speed, improving the uniformity of cement injection.

[0026] The electromagnetic butterfly valve 92 described in this utility model uses a butterfly valve, especially a cement butterfly valve (or powder butterfly valve). The medium transported in slurry pipelines is particulate matter such as cement and mud, which causes severe wear on the valve sealing surface and valve plate. The valve plate of a butterfly valve is usually made of rubber or high-molecular wear-resistant materials (such as ultra-high molecular weight polyethylene), which can effectively resist particle erosion and extend its service life. Some cement butterfly valves also have a wear-resistant layer covering the valve plate, further enhancing its wear resistance. The butterfly valve can be fully opened or fully closed by rotating the valve plate 90°, with a fast operating response, making it suitable for slurry pipelines that require frequent opening and closing. It has a compact structure, small size, low installation space requirements, and is easy to maintain. The flow channel design of the butterfly valve minimizes resistance loss when the medium passes through, reducing pressure loss in the pipeline system and lowering energy consumption, making it particularly suitable for transporting large flow rates of media. The cement butterfly valve uses a soft sealing system (such as nitrile rubber sealing rings) to form a bidirectional flow automatic seal, ensuring stable medium operation and reducing the risk of leakage. The specific working principle and control method of the butterfly valve are existing technologies and will not be elaborated here.

[0027] Compared with other valves, the electromagnetic butterfly valve 92 described in this utility model has a simple structure, quick opening and closing, strong wear and corrosion resistance, low flow resistance, energy saving and high efficiency, and reliable sealing performance.

[0028] It should be noted that in practical applications, the electromagnetic butterfly valve 92 of this utility model is selected in DN100-DN400 specifications according to the pipe size. The pressure rating of the electromagnetic butterfly valve 92 needs to be adapted to working conditions of 0.6MPa~1.6MPa. The temperature range of the electromagnetic butterfly valve 92 is selected to be ≤100℃.

[0029] The electromagnetic butterfly valve 92 adopts a double flange, and the valve body is made of aluminum alloy or carbon steel lined with polymer material, and the valve plate is covered with a wear-resistant layer.

[0030] The curved metal pressure pipe 8 is made of corrugated metal. The corrugated metal pipe has good flexibility and pressure resistance, maintaining a stable shape during the rotation of the rotating pipe 3 and the adjustment of the slurry injection pipe integration device 9, ensuring smooth transmission of cement slurry. Simultaneously, the corrugated metal pipe can withstand a certain pressure, ensuring the smooth progress of the cement injection process.

[0031] Working principle: Start the cement silo's conveying system to introduce cement slurry into the fixed pipe 2 through the inlet pipe 1.

[0032] Simultaneously, the drive motor 52 of the drive integration device 5 is started. The drive motor 52 drives the rotating pipe 3 to rotate around the fixed pipe 2 through the meshing transmission of the drive gear 53 and the gear ring 31.

[0033] According to actual needs, the reduction motor 71 of the auxiliary drive device 7 is activated. The reduction motor 71 drives the mud injection pipe integrated device 9 to make small-angle adjustments through the connecting rotating rod 72, optimizing the mud injection direction. Furthermore, the rotating pipe 3 can rotate around the fixed pipe 2, with the center of the rotating pipe 3's cross-section as the center point and the radial distance of the mud injection pipe integrated device 9 as the radius, to achieve uniform mud injection.

[0034] The opening degree of the electromagnetic butterfly valve 92 in the mud injection pipeline integrated device 9 is adjusted to control the flow rate of cement slurry. After passing through the connecting pipe 93 and the electromagnetic butterfly valve 92, the cement slurry is evenly injected into the wellbore from the mud injection nozzle 91.

[0035] During the cement injection process, the curved metal pressure pipe 8 can move flexibly with the rotation of the rotating pipe 3 and the adjustment of the slurry injection pipe integrated device 9, ensuring the smooth transmission of cement slurry.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An adjustable rotary staged cement injector, characterized in that, It includes an inlet pipe (1), a fixed pipe (2), a rotating pipe (3), a rotating connecting pipe (4), a drive integration device (5), an auxiliary drive device (7), a bent metal pressure pipe (8), and a mud injection pipe integration device (9). One end of the inlet pipe (1) is connected to the cement tank; the other end of the inlet pipe (1) is connected to the top of the fixed pipe (2); the bottom end of the fixed pipe (2) is connected to the top of the rotating pipe (3) through the rotating connecting pipe (4); the driving integrated device (5) is fixedly connected to the outer circumference of the fixed pipe (2); the driving end of the driving integrated device (5) is connected to the rotating pipe (3); the bottom end of the rotating pipe (3) is connected to the top of the mud injection pipe integrated device (9) through the bent metal pressure pipe (8); the outer circumference of the rotating pipe (3) is connected to the auxiliary driving device (7); the driving end of the auxiliary driving device (7) is connected to the mud injection pipe integrated device (9).

2. The adjustable rotary staged cement injector according to claim 1, characterized in that, The inlet pipe (1) includes an interface pipe (11) and a transfer pipe (12); one end of the interface pipe (11) is connected to the cement tank; the other end of the interface pipe (11) is connected to one end of the transfer pipe (12); the other end of the transfer pipe (12) is connected to the top of the fixed pipe (2).

3. The adjustable rotary staged cement injector according to claim 1, characterized in that, The drive integration device (5) includes a fixed box (51) and a drive motor (52); The fixed box (51) is fixedly sleeved on the outer circumference of the fixed pipe (2); the drive motor (52) is detachably connected to the inner side wall of the fixed box (51); the drive end of the drive motor (52) is connected to the rotating pipe (3).

4. The adjustable rotary staged cement injector according to claim 3, characterized in that, The drive integration device (5) also includes a drive gear (53); the drive end of the drive motor (52) is connected to the drive gear (53) via a spline; a gear ring (31) is sleeved on the outer circumference of the rotating pipe (3); the drive gear (53) meshes with the gear ring (31).

5. The adjustable rotary staged cement injector according to claim 1, characterized in that, An auxiliary mounting bracket (32) is fixedly connected to the outer circumference of the rotating pipe (3); an auxiliary drive device (7) is connected to the top surface of the auxiliary mounting bracket (32).

6. The adjustable rotary staged cement injector according to claim 5, characterized in that, The auxiliary drive device (7) includes a geared motor (71) and a connecting rod (72); the bottom surface of the geared motor (71) is connected to the top surface of the auxiliary mounting bracket (32); the drive end of the geared motor (71) is connected to one end of the connecting rod (72) via a spline; the other end of the connecting rod (72) is rotatably connected to the side wall of the mud injection pipe integrated device (9).

7. The adjustable rotary staged cement injector according to claim 1, characterized in that, The mud injection pipeline integrated device (9) includes a mud injection nozzle (91), an electromagnetic butterfly valve (92), and a connecting pipe (93); the top end of the connecting pipe (93) is connected to the curved metal pressure pipe (8); the bottom end of the connecting pipe (93) is connected to the top end of the mud injection nozzle (91) through the electromagnetic butterfly valve (92).

8. The adjustable rotary staged cement injector according to claim 1, characterized in that, The curved metal pressure pipe (8) is made of metal bellows.

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