Cement umbrella well descending tool

Abstract

The utility model discloses a cement umbrella well descending tool which comprises a base, a limiting rod, a pay-off assembly, a supporting plate and a pushing assembly. A receding hole is formed in the center of the base. The limiting rods are arranged on the base and evenly distributed in the circumferential direction of the base. The pay-off assembly is installed on the limiting rod and used for hoisting a cement umbrella. The supporting plate is fixedly connected with the pay-off assembly; the pushing assembly is installed on the supporting plate and used for pushing the cement umbrella to be separated from the paying-off assembly. The well descending structure of the cement umbrella is constructed by arranging the paying-off assembly, the supporting plate and the pushing assembly; specifically, the cement umbrella is hoisted through the paying-off assembly and pushed to the preset position easily through the pushing assembly, well descending is more convenient, and cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of cement plug operation, in particular to a cement umbrella downhole tool. Background Art

[0002] The cement umbrella is mainly used for cement plugging operations. It can support the upper cement slurry column, separate the cement slurry and the lower mud, prevent mutual contamination, improve the success rate of cement plugging operations, and can pump multiple suspended cement plugs in one drilling trip. The cement umbrella is placed at the wellhead and reaches the predetermined depth, and then stretched and fixed in a larger casing or wellbore to create a bottom support for the cement plug. The utility model patent with publication number CN115749678A publicly authorized a drill rod cement umbrella, which can achieve limited protection for the umbrella rod by setting an umbrella tube and push it to the predetermined position with the help of a tool rod.

[0003] However, the above-mentioned drill pipe cement umbrella has a fixed size when actually deployed. If the depth is large, it is necessary to replace the drill pipe cement umbrella with a different length and size so that it can reach the position under the push of the tool rod, which means that it is inconvenient to go down the well and the cost of use is high. Utility Model Content

[0004] The purpose of the utility model is to overcome the above technical deficiencies, to provide a cement umbrella downhole tool, and to solve the technical problems of inconvenience in downhole and high use cost in the prior art.

[0005] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a cement umbrella downhole tool, comprising a base, a limiting rod, a line-releasing assembly, a support plate and a pushing assembly; a clearance hole is opened in the center of the base; the limiting rod is arranged on the base and is evenly distributed along the circumference of the base; the line-releasing assembly is installed on the limiting rod and is used for hoisting the cement umbrella; the support plate is fixedly connected to the line-releasing assembly; the pushing assembly is installed on the support plate and is used for pushing the cement umbrella away from the line-releasing assembly.

[0007] In some embodiments, at least three limiting rods are provided, and the line-releasing assemblies correspond one to one to the limiting rods.

[0008] In some embodiments, the pay-off assembly includes a motor and a winding drum, the output end of the motor is fixedly connected to the winding drum, a cable extends outward from the winding drum, and one end of the cable points downward and passes through the support plate.

[0009] In some embodiments, the support plate is triangular in shape, and is provided with at least three through holes along the circumferential direction. A guide tube is fixedly connected to the through hole, and the lower portion of the cable passes through the guide tube and is fixedly connected to the guide tube.

[0010] In some embodiments, the pushing component includes a double-axial cylinder fixedly installed on the support plate, and the output end of the double-axial cylinder passes through the support plate and can move vertically up and down.

[0011] In some embodiments, the height dimension of the limiting rod is greater than the height dimension of the base.

[0012] In some embodiments, the base includes support feet and a disc, and the support feet are circumferentially distributed along the bottom end of the disc.

[0013] In some embodiments, the lower diameter of the support feet is greater than the upper diameter of the support feet.

[0014] In some embodiments, a limiting hole is formed at the top end of the disc, and the limiting hole is detachably connected to the limiting rod.

[0015] In some embodiments, the limiting holes are evenly distributed circumferentially.

[0016] Compared with the prior art, a cement umbrella downhole tool provided by the present utility model constructs an auxiliary downhole structure by arranging a limiting rod, a support plate, a wire releasing component and a pushing component; specifically, the cement umbrella is sent into the well through the wire releasing component and the separation of the cement umbrella from the wire releasing component is completed through the pushing component, so that the downhole operation is more convenient and the cost is lower. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a cement umbrella downhole tool provided by an embodiment of the present utility model;

[0018] Figure 2 is Figure 1 an enlarged schematic view of part A in

[0019] Figure 3 is Figure 1 the top view of

[0020] Description of the Reference Numerals:

[0021] 100, base; 110, relief hole; 120, support feet; 130, disc; 140, limiting hole; 200, limiting rod; 300, wire releasing component; 310, motor; 320, winding drum; 330, cable; 400, support plate; 410, through hole; 420, guide tube; 500, pushing component; 510, double-axial cylinder. Detailed Embodiments

[0022] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0023] In order to solve the technical problems of inconvenient downhole operation and relatively high usage cost, the present utility model provides a downhole tool for a cement umbrella, which can achieve convenient downhole operation and cost reduction.

[0024] It should be noted that the downhole tool for a cement umbrella described in the present utility model is used for but not limited to the downhole operation of a cement umbrella, etc. For the convenience of description, in the present utility model, only a downhole tool for a cement umbrella applied to a cement umbrella downhole device is taken as an example for description, and the principle of a downhole tool for a cement umbrella applied to other types of devices is substantially the same as that applied to a cement umbrella downhole device, and will not be elaborated here one by one.

[0025] Please refer to Figure 1 - Figure 3 , in which Figure 1 is a schematic structural diagram of a downhole tool for a cement umbrella in an embodiment of the present utility model. A downhole tool for a cement umbrella includes a base 100, a limiting rod 200, a wire releasing assembly 300, a support plate 400 and a pushing assembly 500; a through hole 110 is formed in the center of the base 100; the limiting rod 200 is arranged on the base 100 and is evenly distributed along the circumferential direction of the base 100; the wire releasing assembly 300 is installed on the limiting rod 200 and is used for hoisting the cement umbrella; the support plate 400 is fixedly connected with the wire releasing assembly 300; the pushing assembly 500 is installed on the support plate 400 and is used for pushing the cement umbrella to separate from the wire releasing assembly 300.

[0026] In this embodiment, an auxiliary downhole structure is constructed by setting the limiting rod 200, the support plate 400, the wire releasing assembly 300 and the pushing assembly 500; specifically, the cement umbrella is sent into the well through the wire releasing assembly 300 and the separation of the cement umbrella from the wire releasing assembly 300 is completed through the pushing assembly 500, and the downhole operation is more convenient and the cost is lower. It should be noted that the cement umbrella can be hoisted by sleeving a cylinder body and hoisting the cylinder body, and it is convenient for the pushing assembly 500 to push and separate the cylinder body and the cement umbrella.

[0027] In one of the embodiments, please refer to Figure 1 , at least three limiting rods 200 are provided, and the wire releasing assemblies 300 correspond to the limiting rods 200 one by one.

[0028] In this embodiment, at least three limiting rods 200 are provided, and the cement umbrella can be stably hoisted through at least three wire releasing assemblies 300, effectively ensuring the stable downhole operation of the cement umbrella.

[0029] In one embodiment, see Figure 1 The wire-releasing assembly 300 includes a motor 310 and a winding drum 320 . The output end of the motor 310 is fixedly connected to the winding drum 320 . A cable 330 extends outward from the winding drum 320 . One end of the cable 330 points downward and passes through the support plate 400 .

[0030] In this embodiment, one end of the cable 330 points downward and passes through the support plate 400, which helps the bottom end of the cable 330 to hoist the cement umbrella and facilitates the installation of the pushing assembly 500 on the support plate 400.

[0031] In one embodiment, see Figure 1 , Figure 2 The support plate 400 is triangular in shape and has at least three through holes 410 circumferentially formed therein. A guide tube 420 is fixedly connected to the through hole 410 . The lower portion of the cable 330 passes through the guide tube 420 and is fixedly connected to the guide tube 420 .

[0032] In this embodiment, the through hole 410 is fixedly connected with a guide tube 420 to enhance the stability of the cable 330 at that location.

[0033] In one embodiment, see Figure 1 The pushing assembly 500 includes a double-axis cylinder 510, which is fixedly mounted on the support plate 400. The output end of the double-axis cylinder 510 passes through the support plate 400 and can move up and down in the longitudinal direction.

[0034] In this embodiment, the output end of the dual-axis cylinder 510 passes through the support plate 400 and can move up and down in the longitudinal direction, so that the output end of the dual-axis cylinder 510 can abut against the cement umbrella or abut against the cylinder of the cement umbrella, and complete the detachment of the cement umbrella from the lower end of the cable 330.

[0035] In one embodiment, see Figure 1 , the height of the limiting rod 200 is greater than the height of the base 100.

[0036] In this embodiment, the height of the limiting rod 200 is greater than the height of the base 100, which can facilitate the hoisting of the cement umbrella.

[0037] In one embodiment, see Figure 1 , Figure 3 The base 100 includes supporting feet 120 and a disc 130 , and the supporting feet 120 are distributed circumferentially along the bottom end of the disc 130 .

[0038] In one embodiment, see Figure 1 , the lower diameter of the supporting foot 120 is greater than the upper diameter of the supporting foot 120.

[0039] In one of the embodiments, please refer to Figure 1 , a limiting hole 140 is formed at the top end of the disc 130, and the limiting hole 140 is detachably connected to the limiting rod 200.

[0040] In one of the embodiments, please refer to Figure 1 , the limiting holes 140 are evenly distributed along the circumferential direction.

[0041] In this embodiment, the even distribution of the limiting holes 140 along the circumferential direction helps the flexible layout of the limiting rod 200.

[0042] To better understand the present invention, the technical solutions of the present invention will be described in detail below in conjunction with Figures 1 to 3 :

[0043] First, hoist the bottom ends of the three cables 330 to the top end of the cement umbrella and let the cement umbrella hang naturally; then, start the motor 310 and drive the wire winding drum 320 to pay out the wire smoothly; then, the cement umbrella will fall into a deeper position in the well along with the payout of the cable 330 until it reaches the predetermined position; then, start the double-shaft cylinder 510 and make its output end push the top end of the cement umbrella and force the cement umbrella to separate from the bottom end of the cable 330. At this time, the whole downhole operation is completed; because the above structure does not need to consider the downhole depth, nor does it need to change the height dimension of the cement umbrella, the downhole operation is more convenient and the use cost is lower.

[0044] The above specific embodiments of the present invention do not constitute a limitation to the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A cement umbrella downhole tool, characterized in that, Comprising: A base, a relief hole is provided at the center of the base; Limit rods, the limit rods are arranged on the base and evenly distributed along the circumference of the base; A wire releasing assembly, the wire releasing assembly is installed on the limit rods and is used for hoisting a cement umbrella; A support plate, the support plate is fixedly connected to the wire releasing assembly; and A pushing assembly, the pushing assembly is installed on the support plate and is used for pushing the cement umbrella away from the wire releasing assembly.

2. The downhole tool for a cement umbrella according to claim 1, wherein At least three limit rods are provided, and the wire releasing assembly corresponds to the limit rods one by one.

3. A cement umbrella downhole tool according to claim 1, characterized in that, The wire releasing assembly includes a motor and a wire winding cylinder, the output end of the motor is fixedly connected to the wire winding cylinder, a cable extends outward from the wire winding cylinder, and one end of the cable points downward and penetrates through the support plate.

4. The downhole tool for a cement umbrella according to claim 3, characterized in that, The support plate is triangular, at least three through holes are provided along the circumference of the support plate, a guide tube is fixedly connected at the through holes, and the lower part of the cable penetrates through the guide tube and is fixedly connected to the guide tube.

5. A downhole tool for a cement umbrella according to claim 1, characterized in that, The pushing assembly includes a double-acting cylinder, the double-acting cylinder is fixedly installed on the support plate, and the output end of the double-acting cylinder passes through the support plate and can move up and down longitudinally.

6. The downhole tool for a cement umbrella according to claim 1, wherein, The height dimension of the limit rod is greater than the height dimension of the base.

7. A cement umbrella downhole tool according to claim 1, characterized in that, The base includes support feet and a disc, and the support feet are distributed along the circumference of the bottom end of the disc.

8. A downhole tool for a cement umbrella according to claim 7, characterized in that, The lower diameter of the support foot is greater than the upper diameter of the support foot.

9. The downhole tool for a cement umbrella according to claim 7, characterized in that, A limit hole is provided at the top end of the disc, and the limit hole is detachably connected to the limit rod.

10. The downhole tool for a cement umbrella according to claim 9, characterized in that, The limit holes are evenly distributed along the circumference.

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