Anti-sedimentation structure of drill rod passing cement umbrella

Abstract

The utility model discloses an anti-sedimentation structure of a drill rod passing cement umbrella, and particularly relates to the technical field of well cementation mechanical equipment, the anti-sedimentation structure comprises a cement umbrella main body, an anti-sedimentation assembly is arranged outside the lower end of the cement umbrella main body, a plurality of cement umbrella supports are arranged at the upper end of the cement umbrella main body, and first connecting hinges are arranged on the outer side end faces of the cement umbrella supports; a mounting sleeve is arranged in the middle of the anti-sedimentation assembly, and an anti-sedimentation supporting rod is arranged outside the mounting sleeve. In the actual use process, under the corresponding arrangement state of the anti-sedimentation supporting rod, the tension spring, the supporting plate and the supporting insertion rod, the rotary connecting piece and the first connecting hinge can be tensioned through the tension spring, the anti-sedimentation supporting rod can be unfolded outwards through the contraction force generated by the tension spring, the supporting plate is attached to the interior of a drilling well, and therefore the anti-sedimentation supporting rod and the supporting insertion rod are fixed. After the cement umbrella main body is subjected to the gravity of cement paste, the supporting insertion rod is inserted into the inner wall of a drilling well, so that the cement umbrella main body is supported through the mounting sleeve and the anti-settling supporting rod.

Description

A settlement prevention structure for a cement umbrella over a drill pipe Technical Field

[0001] This utility model relates to the field of cementing machinery and equipment technology, specifically to an anti-settlement structure for a cement umbrella over the drill pipe. Background Technology

[0002] A cement umbrella is an isolation device used during cementing of suspended cementing sections to prevent cement slurry from settling due to displacement with drilling fluid. Installed at the bottom of the suspended cementing section, the cement umbrella supports the cement in the annulus, preventing or reducing cement slurry leakage. They are typically installed on casing strings above weak formation structures, but they are also used in layered cementing and surface cementing. For example, patent CN217129493U discloses a positive compression cement umbrella, comprising an inverted cement umbrella body. The cement umbrella body includes a retractable umbrella rib structure that can contract or expand. The umbrella rib structure is fitted onto the casing, and an umbrella surface is provided on the umbrella rib structure. A cement umbrella support is provided between the umbrella rib structure and the casing. The first end of the cement umbrella support is hinged to the umbrella rib structure, and the second end of the cement umbrella support is hinged to a tensioning structure for pulling and pushing. The cement umbrella frame has a forward-opening and closing structure, which includes a compression-type dynamic spring. The dynamic spring is located on the sleeve above the cement umbrella frame and can push the cement umbrella frame from the end away from the top of the umbrella towards the top of the umbrella to achieve the purpose of opening the umbrella in the conventional forward direction. At the bottom of the dynamic spring, there is a locking structure that can lock the umbrella rib structure in the open state. A first straightener is located on the sleeve above the umbrella rib structure, and a second straightener is located on the sleeve below the umbrella rib structure. A sleeve short connector is located at the top of the sleeve, and the outer diameter of the sleeve short connector is larger than the outer diameter of the sleeve.

[0003] When the above-mentioned device is in use, the umbrella rib structure can open and close. Before the umbrella rib structure opens, the cement umbrella body is protected by the casing short-circuit, the first centralizer, and the second centralizer. The locking structure can lock and fix the opened umbrella rib structure to ensure construction safety. Before cementing, the casing is placed and the casing short-circuit is protected at the top. When lowering, the cement umbrella body is between the first centralizer and the second centralizer, reducing the liquid or mechanical pressure on the cement umbrella body and effectively protecting the integrity and functionality of the cement umbrella. After being lowered into place, the cement umbrella can be pushed by the power spring to be in the open working state. However, when cement slurry is being constructed, the umbrella ribs are subjected to greater pressure and are more prone to deformation and settlement, which affects the stability of the cement umbrella in use. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an anti-settlement structure for a cement umbrella through a drill rod. The technical problem to be solved by the present invention is: how to prevent the cement umbrella from settling during use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cement umbrella anti-settlement structure for a drill rod, comprising a cement umbrella body, an anti-settlement component provided on the lower exterior of the cement umbrella body, a plurality of cement umbrella supports provided on the upper end of the cement umbrella body, and a first connecting hinge provided on the outer end face of the cement umbrella supports.

[0006] The anti-settlement component has an installation sleeve in the middle, and an anti-settlement support rod is provided on the outside of the installation sleeve. A limiting adapter ring is provided on one side of the outer end of the anti-settlement support rod.

[0007] In a preferred embodiment, the inner side of the cement umbrella bracket is provided with cement umbrella slats, and the lower end of the cement umbrella bracket is provided with a support collar.

[0008] In a preferred embodiment, a plurality of second connecting hinges are provided on the upper side of the outer end face of the mounting sleeve.

[0009] In a preferred embodiment, the anti-settlement support rod has a support plate at the end away from the second connecting hinge, and the outer end face of the support plate has a plurality of support rods.

[0010] In a preferred embodiment, a limiting block is provided on one side of the upper end of the anti-settlement support rod.

[0011] In a preferred embodiment, the outer end of the first connecting hinge is provided with a first U-shaped retaining ring, the upper end of the anti-settlement support rod is provided with a rotating connector on one side of the limiting block, and the upper end of the rotating connector is provided with a second U-shaped retaining ring.

[0012] In a preferred embodiment, a tension spring is provided between the first U-shaped retaining ring and the second U-shaped retaining ring.

[0013] In a preferred embodiment, both ends of the tension spring are provided with U-shaped connecting rings.

[0014] In a preferred embodiment, the cement umbrella bracket and the cement umbrella slats are arranged in an inclined state in the cross-section of the main viewing direction, and the cement umbrella bracket is made of ultra-high strength steel.

[0015] In a preferred embodiment, the inner end face of the mounting sleeve in the top view is adapted to the outer end face of the support ring in the top view, and the outer end face of the limiting adapter ring is in contact with one side of the outer end face of the limiting block.

[0016] In a preferred embodiment, the limiting adapter ring is made of magnesium-based metal or an all-metal component, the cement umbrella is made of ultra-high strength steel, and the inner end face of the supporting collar is adapted to the outer end face of the sleeve.

[0017] In a preferred embodiment, the concrete umbrella support is configured in a double-layer U-shape in the main viewing direction, the inner end face of the U-shaped groove of the concrete umbrella support is adapted to the outer end face of the concrete umbrella sheet, and the concrete umbrella sheet and the concrete umbrella support are connected by welding.

[0018] In a preferred embodiment, the support rod is curved in the main view direction, the support rod is made of ultra-high strength steel, and one end of the support rod is tapered.

[0019] In a preferred embodiment, the tension spring is connected to a first U-shaped retaining ring and a second U-shaped retaining ring via U-shaped connecting rings at both ends, and the diameter of the outer end face of the limiting adapter ring in the top view is smaller than the diameter of the outer end face of the cement umbrella bracket in the top view.

[0020] This utility model has the following advantages:

[0021] In actual use, with the anti-settlement support rod, tension spring, support plate, and support rod in their corresponding configuration, the tension spring can tighten the rotating connector and the first connecting hinge. The contraction force generated by the tension spring will unfold the anti-settlement support rod outward, allowing the support plate to fit against the inside of the well. When the cement umbrella body is subjected to the weight of the cement slurry, the support rod will insert into the inner wall of the well. Thus, the cement umbrella body is supported by the mounting sleeve and the anti-settlement support rod, thereby effectively preventing the cement umbrella body from settling during long-term use.

[0022] At the same time, when the limit block and the limit adapter ring are set in the corresponding state, the anti-settlement support rod can be tightened by the limit adapter ring, so that the anti-settlement support rod retracts inward, thereby avoiding contact between the anti-settlement component and the inner wall of the well when it sinks into the well. Attached Figure Description

[0023] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0024] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0025] Figure 1 is a schematic diagram of the overall structure of this utility model.

[0026] Figure 2 is a schematic diagram of the overall main structure of this utility model.

[0027] Figure 3 is a schematic diagram of the overall front view cross-sectional structure of this utility model.

[0028] Figure 4 is an enlarged view of part A in Figure 3 of this utility model.

[0029] Figure 5 is a schematic diagram of the anti-settlement support rod structure of this utility model.

[0030] In the diagram: 1. Cement umbrella body, 2. Anti-settlement component, 3. Cement umbrella sheet, 4. Cement umbrella bracket, 5. Support ring, 6. Mounting sleeve, 7. First connecting hinge, 8. Second connecting hinge, 9. Anti-settlement support rod, 10. First U-shaped retaining ring, 11. Tension spring, 12. U-shaped connecting ring, 13. Limiting block, 14. Rotary connector, 15. Second U-shaped retaining ring, 16. Support plate, 17. Support rod, 18. Limiting adapter ring. Detailed Implementation

[0031] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] This utility model provides an anti-settlement structure for a cement umbrella through a drill rod, as shown in Figures 1 and 2. It includes a cement umbrella body 1, an anti-settlement component 2 on the outside of the lower end of the cement umbrella body 1, and multiple cement umbrella supports 4 on the upper end of the cement umbrella body 1.

[0033] The outer end face of the cement umbrella support 4 is provided with a first connecting hinge 7, the middle part of the anti-settlement component 2 is provided with an installation sleeve 6, the outside of the installation sleeve 6 is provided with an anti-settlement support rod 9, and the inner side of the cement umbrella support 4 is provided with cement umbrella plates 3. When the well is poured, the cement umbrella plates 3 can support the concrete, thereby preventing the cement slurry from settling due to the replacement of the drilling fluid. This isolation device prevents or reduces the leakage of cement slurry, protects the weak formation structure, and prevents excessive static pressure from the weight of the cement column. At the same time, the cement umbrella support 4 can support the cement umbrella plates 3, thereby effectively increasing the stability of the cement umbrella plates 3 in supporting the cement slurry and increasing the service life of the cement umbrella plates 3.

[0034] The lower end of the cement umbrella bracket 4 is provided with a support collar 5, and the upper side of the outer end face of the mounting sleeve 6 is provided with multiple second connecting hinges 8. The cement umbrella bracket 4 and the cement umbrella slab 3 are set in an inclined state in the main viewing direction.

[0035] The cement umbrella bracket 4 is made of ultra-high strength steel. The inner end face of the mounting sleeve 6 in the top view direction matches the outer end face of the support ring 5 in the top view direction. The cement umbrella slats 3 are made of ultra-high strength steel, which allows the mounting sleeve 6 to be easily installed on the outer end face of the support ring 5.

[0036] The inner end face of the support collar 5 is adapted to the outer end face of the sleeve. The cross-section of the cement umbrella bracket 4 in the main viewing direction is set in a double-layer U-shape. The inner end face of the U-shaped groove of the cement umbrella bracket 4 is adapted to the outer end face of the cement umbrella sheet 3. The cement umbrella sheet 3 and the cement umbrella bracket 4 are connected by welding.

[0037] As shown in Figures 3, 4 and 5, a limiting adapter ring 18 is provided on one side of the outer end of the anti-settlement support rod 9, a first U-shaped retaining ring 10 is provided on the outer end of the first connecting hinge 7, and a support plate 16 is provided at the end of the anti-settlement support rod 9 away from the second connecting hinge 8.

[0038] The outer end face of the support plate 16 is provided with multiple support rods 17. The upper end of the anti-settlement support rod 9 is provided with a limiting block 13 on one side, which can easily fit the limiting adapter ring 18 on the outer end face of the anti-settlement support rod 9 and fit the limiting adapter ring 18 against one side of the outer end face of the limiting block 13. Thus, the multiple anti-settlement support rods 9 are limited by the limiting adapter ring 18, so that the anti-settlement support rod 9 is in an inward contraction state. When the cement umbrella body 1 descends into the well, it avoids the support rods from contacting the well wall. The upper end of the anti-settlement support rod 9 is provided with a rotating connector 14 on one side of the limiting block 13.

[0039] The upper end of the rotary connector 14 is provided with a second U-shaped retaining ring 15, and a tension spring 11 is provided between the first U-shaped retaining ring 10 and the second U-shaped retaining ring 15. Both ends of the tension spring 11 are provided with U-shaped connecting rings 12, and the outer end face of the limiting adapter ring 18 is in contact with one side of the outer end face of the limiting block 13.

[0040] The limiting adapter ring 18 is made of magnesium-based metal or all-metal components. The support rod 17 is set in a curved state in the main view direction. The support rod 17 is made of ultra-high strength steel and one end of the support rod 17 is set in a tapered state.

[0041] The tension spring 11 is connected to the first U-shaped retaining ring 10 and the second U-shaped retaining ring 15 via U-shaped connecting rings 12 at both ends. When the cement umbrella body 1 is fixed, and the cement umbrella body 1 and the anti-settlement component 2 are inserted into the well at a suitable position, the limiting adapter ring 18 will dissolve within a certain period of time. After the limiting adapter ring 18 dissolves, the U-shaped connecting ring 12 will contract inward. The elastic force of the contraction of the U-shaped connecting ring 12 will pull the second U-shaped retaining ring 15, causing the anti-settlement support rod 9 to unfold outward, so that the support plate 16 fits against the inner wall of the well, and the support rod 17 will be inserted into the inner wall of the well. Thus, the cement umbrella bracket 4 is supported by the anti-settlement support rod 9 and the mounting sleeve 6, thereby effectively preventing the cement umbrella body 1 and the anti-settlement component 2 from settling during long-term operation. The outer end face diameter of the limiting adapter ring 18 in the top view direction is smaller than the outer end face diameter of the cement umbrella bracket 4 in the top view direction.

[0042] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A settlement prevention structure for a cement umbrella over a drill rod, comprising a cement umbrella body (1), characterized in that: The lower end of the cement umbrella body (1) is provided with an anti-settlement component (2), the upper end of the cement umbrella body (1) is provided with multiple cement umbrella brackets (4), the outer end face of the cement umbrella bracket (4) is provided with a first connecting hinge (7); the middle part of the anti-settlement component (2) is provided with an installation sleeve (6), the outer side of the installation sleeve (6) is provided with an anti-settlement support rod (9), and one side of the outer end of the anti-settlement support rod (9) is provided with a limiting adapter ring (18).

2. The anti-settlement structure of the cement umbrella through the drill rod according to claim 1, characterized in that: The cement umbrella bracket (4) has a cement umbrella sheet (3) on its inner side, and a support collar (5) is provided at the lower end of the cement umbrella bracket (4).

3. The anti-settlement structure of the cement umbrella through the drill rod according to claim 1, characterized in that: The upper side of the outer end face of the mounting sleeve (6) is provided with a plurality of second connecting hinges (8).

4. The anti-settlement structure of the cement umbrella through the drill rod according to claim 3, characterized in that: The anti-settlement support rod (9) has a support plate (16) at one end away from the second connecting hinge (8), and the outer end face of the support plate (16) is provided with a plurality of support rods (17).

5. The anti-settlement structure of the cement umbrella through the drill rod according to claim 1, characterized in that: The anti-settlement support rod (9) has a limiting block (13) on one side of its upper end.

6. The anti-settlement structure of the cement umbrella through the drill rod according to claim 5, characterized in that: The outer end of the first connecting hinge (7) is provided with a first U-shaped retaining ring (10), and the upper end of the anti-settlement support rod (9) is provided with a rotating connector (14) on one side of the limiting block (13), and the upper end of the rotating connector (14) is provided with a second U-shaped retaining ring (15).

7. The anti-settlement structure of the cement umbrella through the drill rod according to claim 6, characterized in that: A tension spring (11) is provided between the first U-shaped retaining ring (10) and the second U-shaped retaining ring (15).

8. The anti-settlement structure of the cement umbrella through the drill rod according to claim 7, characterized in that: Both ends of the tension spring (11) are provided with U-shaped connecting rings (12).

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