Cable greying and self-stirring device

Abstract

The present application relates to oil and gas well downhole operation tool technical field, it is a cable throws ash isolation self stirring device, it includes throwing ash cylinder collection umbrella, throwing ash cylinder lower body, throwing ash cylinder upper body, throwing ash cylinder upper body lower side fixedly connected with throwing ash cylinder lower body, throwing ash cylinder lower body lower side is equipped with throwing ash cylinder collection umbrella, throwing ash cylinder collection umbrella outside is equipped with a plurality of inside and outside through lower throwing ash window along the circumference interval, throwing ash cylinder lower body middle part outside is equipped with a plurality of inside and outside through upper throwing ash window along the circumference interval, throwing ash cylinder lower body inside lower side is equipped with turbine device.The present application is reasonable and compact, convenient to use, the rotation of turbine device drives rotating magnet group rotation to form rotating magnetic field, then the rotating magnetic field drives stirring magnet group to form driven rotation, reaches the role of stirring cement mortar in throwing ash cylinder lower body, effectively solves the problem that cement mortar deposits in throwing ash cylinder lower body, makes that throwing ash density is uniform, improves the sealing effect of well shut-off.

Description

Technical Field

[0001] This invention relates to the field of downhole tools for oil and gas wells, and is a cable-operated ash-discharging, flow-blocking, and self-stirring device. Background Technology

[0002] In oilfield exploration and development, permanent formation sealing operations primarily employ sealing techniques such as cement plugs, bridge plugs, and cable-assisted slurry injection. Cable-assisted slurry injection is widely used in formation sealing technologies across major oilfields in China due to its advantages including short construction cycle, accurate slurry volume, precise positioning, and low cost. After filling the slurry injection cylinder with slurry, the cylinder is lowered into the well to the specific injection point, a process that takes approximately 30-50 minutes (longer for pressurized cables). This method of delivering slurry into the well has the following problems: prolonged operation can lead to slurry sedimentation and solidification, resulting in uneven slurry density and poor sealing performance. Years of experience have shown that slurry sedimentation occurs at the bottom of the injection cylinder, 10-20 cm below the glass. Even if the injection mechanism breaks the glass, the slurry may still fail to be injected, resulting in injection failure. A more serious consequence is that the agitation during the lifting of the injection cylinder may cause slurry to be randomly injected into a specific well section, leading to operational accidents. Summary of the Invention

[0003] This invention provides a cable ash feeding and flow-blocking self-stirring device, which overcomes the shortcomings of the prior art. It can effectively solve the problem of uneven ash density and poor well sealing effect caused by the sedimentation and coagulation of cement slurry in existing cable ash feeding devices used for feeding ash into wells.

[0004] The technical solution of the present invention is achieved through the following measures: a cable ash feeding and diversion self-stirring device, comprising an ash feeding cylinder collecting umbrella, a lower ash feeding cylinder body, an upper ash feeding cylinder body, a turbine device, a rotating magnet group, a partition glass, and a stirring magnet group. The lower ash feeding cylinder body is fixedly connected to the lower side of the upper ash feeding cylinder body. An ash feeding cylinder collecting umbrella is provided on the lower side of the lower ash feeding cylinder body. Multiple lower ash feeding windows with internal and external penetrations are provided at intervals along the circumference on the outer side of the ash feeding cylinder collecting umbrella. Multiple upper ash feeding windows with internal and external penetrations are provided at intervals along the circumference on the outer side of the middle part of the lower ash feeding cylinder body. A turbine device is provided on the lower side of the interior of the lower ash feeding cylinder body. A rotating magnet group is fixedly installed on the upper end of the turbine device. A partition glass is fixed on the inner side of the lower ash feeding cylinder body above the rotating magnet group. A stirring magnet group is provided on the inner side of the lower ash feeding cylinder body above the partition glass. The magnetic field direction of the stirring magnet group is opposite to that of the rotating magnet group.

[0005] The following are further optimizations and / or improvements to the above-mentioned technical solution: The aforementioned turbine device may include turbine blades and a turbine shaft. Multiple turbine blades are evenly distributed around the outer side of the turbine shaft along the circumference. The upper end of the turbine shaft is fixedly installed together with a rotating magnet assembly.

[0006] The aforementioned rotating magnet assembly may include a fixed frame and multiple magnets with different magnetic properties. The fixed frame is circular, and at least two support rods are evenly distributed along the circumference on the lower side of the fixed frame. The lower end of the support rods is fixedly connected to the upper end of the turbine shaft. Multiple magnets are evenly embedded on the upper and lower sides of the fixed frame along the circumference, and magnets with different magnetic properties are spaced apart. The magnets at corresponding positions on the upper and lower sides of the fixed frame have the same magnetic properties.

[0007] The above may also include a stirring support, which is circular in shape. The stirring magnet assembly includes multiple stirring magnets with different magnetic properties. The multiple stirring magnets are evenly embedded along the circumference on the upper and lower sides of the stirring support, and the stirring magnets with different magnetic properties are spaced apart. The stirring magnets at corresponding positions on the upper and lower sides of the stirring support have the same magnetic properties.

[0008] The aforementioned ash collection umbrella can be in the shape of a cone, smaller at the bottom and larger at the top.

[0009] This invention features a reasonable and compact structure, and is easy to use. It utilizes the fluid dynamics generated by the interaction between the liquid in the well and the device as a power source. The rotation of the turbine device drives the rotating magnet group to rotate, forming a rotating magnetic field. This rotating magnetic field then drives the stirring magnet group to rotate, achieving the effect of stirring cement mortar in the lower part of the mortar feeding cylinder. It has the advantages of requiring no other power source, convenient installation and disassembly, and easy operation. It effectively solves the problem of cement mortar sedimentation in the lower part of the mortar feeding cylinder, resulting in uniform mortar density, improved well sealing effect, and short operation time, thereby improving construction safety and success rate. Attached Figure Description

[0010] Appendix Figure 1 This is a schematic diagram of the internal structure of the present invention.

[0011] The codes in the attached diagram are as follows: 1 is the ash collection umbrella of the ash feeding cylinder, 2 is the lower body of the ash feeding cylinder, 3 is the upper body of the ash feeding cylinder, 4 is the partition glass, 5 is the lower ash feeding window, 6 is the turbine blade, 7 is the turbine shaft, 8 is the fixing frame, 9 is the magnet, 10 is the support rod, 11 is the stirring bracket, and 12 is the stirring magnet. Detailed Implementation

[0012] The present invention is not limited to the following embodiments, and specific implementation methods can be determined according to the technical solutions and actual conditions of the present invention.

[0013] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0014] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1: As shown in the attached document Figure 1 As shown, the cable ash feeding and diversion self-stirring device includes an ash feeding cylinder collecting umbrella 1, an ash feeding cylinder lower body 2, an ash feeding cylinder upper body 3, a turbine device, a rotating magnet group, a partition glass 4, and a stirring magnet group. The ash feeding cylinder lower body 2 is fixedly connected to the lower side of the ash feeding cylinder upper body 3. The ash feeding cylinder collecting umbrella 1 is provided on the lower side of the ash feeding cylinder lower body 2. Multiple lower ash feeding windows 5 with internal and external penetration are provided on the outer side of the ash feeding cylinder collecting umbrella 1 along the circumference. Multiple upper ash feeding windows with internal and external penetration are provided on the outer side of the middle part of the ash feeding cylinder lower body 2 along the circumference. A turbine device is provided on the lower side of the interior of the ash feeding cylinder lower body 2. A rotating magnet group is fixedly installed on the upper end of the turbine device. A partition glass 4 is fixed on the inner side of the ash feeding cylinder lower body 2 above the rotating magnet group. A stirring magnet group is provided on the inner side of the ash feeding cylinder lower body 2 above the partition glass 4. The magnetic field direction of the stirring magnet group is opposite to that of the rotating magnet group.

[0015] In the above embodiment, cement mortar is first poured into the inside of the mortar feeding cylinder. The entire invention is then lowered into the well to a predetermined depth via a cable. During the lowering process, the liquid medium in the well moves relative to the device, and the liquid in the well flows in through the lower mortar feeding window 5, forming a liquid flow relative to the device in the space of the lower body 2 of the mortar feeding cylinder. This liquid flow impacts and drives the turbine device to rotate, and then flows out through the upper mortar feeding window. The rotating turbine device drives the rotating magnet group to rotate. During the rotation, the rotating magnet group forms a rotating magnetic field inside the lower body 2 of the mortar feeding cylinder. Under the action of the rotating magnetic field, the stirring magnet group, which is opposite to the direction of the magnetic field of the rotating magnet group, rotates passively inside the lower body 2 of the mortar feeding cylinder in the direction of the rotating magnetic field, thereby stirring the cement mortar that enters the lower body 2 of the mortar feeding cylinder.

[0016] In summary, this invention utilizes the fluid dynamics generated by the interaction between the well fluid and the device as a power source. The rotation of the turbine device drives the rotating magnet group to rotate, forming a rotating magnetic field. This rotating magnetic field then drives the stirring magnet group to rotate, achieving the effect of stirring cement slurry within the lower body 2 of the slurry feeding cylinder. It has advantages such as requiring no other power source, convenient installation and disassembly, and easy operation. It effectively solves the problem of cement slurry sedimentation within the lower body 2 of the slurry feeding cylinder, resulting in uniform slurry density, improved well sealing effect, and shorter operation time, thereby improving construction safety and success rate.

[0017] Example 2: Further optimization of Example 1 above, as shown in the attached figure. Figure 1As shown, the turbine device includes turbine blades 6 and a turbine shaft 7. Multiple turbine blades 6 are evenly distributed around the outer side of the turbine shaft 7 along its circumference. The upper end of the turbine shaft 7 is fixedly installed with the rotating magnet assembly. Therefore, when the device is lowered, the liquid medium inside the well moves relative to the device. The liquid flows into the well through the lower ash-feeding window 5, forming a liquid flow relative to the lower ash-feeding cylinder 2 within the space of the lower body 2. This liquid flow impacts and drives the turbine blades 6 to rotate, and the rotating turbine blades 6 drive the turbine shaft 7 to rotate, thereby further driving the rotating magnet assembly to rotate.

[0018] Example 3: Further optimizations to Examples 1 and 2 above, as shown in the appendix. Figure 1 As shown, the rotating magnet assembly includes a fixed frame 8 and multiple magnets 9 with different magnetic properties. The fixed frame 8 is circular, and at least two support rods 10 are evenly distributed along the circumference of the lower side of the fixed frame 8. The lower ends of the support rods 10 are fixedly connected to the upper end of the turbine shaft 7. The multiple magnets 9 are evenly embedded on the upper and lower sides of the fixed frame 8 along the circumference, and magnets 9 with different magnetic properties are arranged alternately. Magnets 9 at corresponding positions on the upper and lower sides of the fixed frame 8 have the same magnetic properties. Therefore, by placing magnets 9 with the same magnetic properties at corresponding positions on the upper and lower sides of the fixed frame 8, it is easy to increase the rotating magnetic field of the magnets 9.

[0019] Example 4: Further optimization of Example 1 above, as shown in the appendix. Figure 1 As shown, the system also includes a stirring support 11, which is circular in shape. The stirring magnet assembly comprises multiple stirring magnets 12 with different magnetic properties. These magnets 12 are evenly embedded along the circumference of the upper and lower sides of the stirring support 11, with different magnetic properties spaced apart. The stirring magnets 12 at corresponding positions on the upper and lower sides of the stirring support 11 have the same magnetic properties. Therefore, by placing stirring magnets 12 with the same magnetic properties at corresponding positions on both the upper and lower sides of the stirring support 11, the follower effect of the rotating magnetic field on the stirring magnets 12 is increased.

[0020] Example 5: Further optimization of Example 1 above, as shown in the attached figure. Figure 1 As shown, the ash collection umbrella 1 is a cone shape, smaller at the bottom and larger at the top. This design facilitates the lowering of the ash collection umbrella 1 and reduces the resistance during lowering.

[0021] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A cable ash feeding and flow-blocking self-stirring device, characterized in that... The device includes a ash-feeding cylinder collecting umbrella, a lower ash-feeding cylinder body, an upper ash-feeding cylinder body, a turbine device, a rotating magnet assembly, a partition glass, and a stirring magnet assembly. The lower ash-feeding cylinder body is fixedly connected to the lower side of the upper ash-feeding cylinder body. The ash-feeding cylinder collecting umbrella is located on the lower side of the lower ash-feeding cylinder body. Multiple internal and external ash-feeding windows are spaced along the circumference on the outer side of the ash-feeding cylinder collecting umbrella. Multiple internal and external ash-feeding windows are spaced along the circumference on the outer side of the middle part of the lower ash-feeding cylinder body. A turbine device is located on the lower side of the lower ash-feeding cylinder body. A rotating magnet assembly is fixedly installed on the upper end of the turbine device. A partition glass is fixed on the inner side of the lower ash-feeding cylinder body above the rotating magnet assembly. A stirring magnet assembly is located on the inner side of the lower ash-feeding cylinder body above the partition glass. The magnetic field directions of the stirring magnet assembly and the rotating magnet assembly are opposite. The turbine device is driven by the hydrodynamic force generated by the relative motion of the liquid in the well. The partition glass achieves flow isolation and sealing between the ash slurry chamber and the turbine chamber. The magnetic field directions of the stirring magnet assembly and the rotating magnet assembly are opposite, forming magnetic coupling and driven stirring.

2. The cable ash feeding and flow-blocking self-stirring device according to claim 1, characterized in that... The turbine assembly includes turbine blades and a turbine shaft. Multiple turbine blades are evenly distributed around the outer side of the turbine shaft along the circumference. The upper end of the turbine shaft is fixedly installed together with a rotating magnet assembly.

3. The cable ash feeding and flow-blocking self-stirring device according to claim 2, characterized in that... The rotating magnet assembly includes a fixed frame and multiple magnets with different magnetic properties. The fixed frame is circular, and at least two support rods are evenly distributed along the circumference on the lower side of the fixed frame. The lower end of the support rods is fixedly connected to the upper end of the turbine shaft. Multiple magnets are evenly embedded on the upper and lower sides of the fixed frame along the circumference, and magnets with different magnetic properties are spaced apart. The magnets at corresponding positions on the upper and lower sides of the fixed frame have the same magnetic properties.

4. The cable ash feeding and flow-blocking self-stirring device according to claim 1, 2, or 3, characterized in that... It also includes a stirring support, which is circular in shape. The stirring magnet assembly includes multiple stirring magnets with different magnetic properties. The multiple stirring magnets are evenly embedded on the upper and lower sides of the stirring support along the circumference, and the stirring magnets with different magnetic properties are spaced apart. The stirring magnets at corresponding positions on the upper and lower sides of the stirring support have the same magnetic properties.

5. The cable ash feeding and flow-blocking self-stirring device according to claim 1, 2, or 3, characterized in that... The ash collection tube is cone-shaped, with a smaller bottom and a larger top.

6. The cable ash feeding and flow-blocking self-stirring device according to claim 4, characterized in that... The ash collection tube is cone-shaped, with a smaller bottom and a larger top.

Images