Metal soluble bridge plug

Abstract

A metal soluble bridge plug comprises a central pipe, a push ring, slips and a fastening belt, and is characterized in that a circle of mounting blocks are arranged on the rear side of the central pipe, limiting blocks are arranged at the tops of the mounting blocks, gaps are formed between the mounting blocks, the slips are hinged to the mounting blocks, a spring piece is arranged on the inner side face of each slip, and the fastening belt is arranged on the inner side face of each slip. A clamping groove is formed in the outer side face of each slip, the fastening belts are fixed in the clamping grooves to tightly press the slips on the central pipe, and when the slips are tightly pressed on the central pipe, the spring pieces are in a folded state. The bridge plug can rapidly and effectively unfold the slips and block the central pipe in the setting process, synchronous operation of anchoring and blocking of the bridge plug is achieved, and the anchoring capacity and the blocking effect of the bridge plug are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and gas mining equipment, and particularly relates to a metal soluble bridge plug. Background Art

[0002] As oil and gas field development expands to deep, ultra-deep, and complex geological conditions, higher requirements are placed on the performance of bridge plugs. On the one hand, bridge plugs need to have stronger anchoring capabilities to ensure that they can be firmly fixed in the wellbore under high pressure difference environments to prevent the bridge plug from displacement or failure. During the setting process of existing soluble bridge plugs, the opening method and angle of the slips are difficult to accurately control, resulting in poor anchoring effect between the slips and the wellbore wall. They cannot withstand large pressure differences and are prone to anchor failure. The slip structure design of some soluble bridge plugs is unreasonable and cannot provide stable and sufficient support during the setting process, making it impossible for the slips to contact the wellbore wall evenly, affecting the anchoring effect. In addition, existing bridge plugs are anchored first and then the sealing ball is thrown to seal the central pipe. If the central pipe can be quickly and effectively sealed while the slips of the bridge plug are opened, the sealing ability of the bridge plug can be further improved. Utility Model Content

[0003] The utility model provides a metal soluble bridge plug, which can quickly and effectively deploy slips and seal the central pipe during the setting process, thereby achieving synchronous operations of anchoring and sealing of the bridge plug and improving the anchoring ability and sealing effect of the bridge plug.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A metal soluble bridge plug comprises a center tube, a push ring, a slip and a fastening belt. A circle of mounting blocks is provided at the rear side of the center tube, a limit block is provided on the top of the mounting block, and gaps are provided between the mounting blocks. The slips are hinged on the mounting blocks, and a spring sheet is provided on the inner side of each slip, and a slot is provided on the outer side of each slip. The fastening belt is fixed in the slot to press the slip against the center tube. When the slip is pressed against the center tube, the spring sheet is in a folded state; the push ring is provided at the rear side of the mounting block, and two push rods are provided on the push ring, which are symmetrically arranged forward. Cutters are provided at the ends of the two push rods, and the cutters are arranged corresponding to the fastening belt; a sealing sleeve is provided at the front side of the center tube.

[0006] A rear support frame is provided on the rear side of the push ring, and a plug is provided on the support frame. The plug is arranged corresponding to the channel of the central tube.

[0007] One end of the spring sheet is fixed to the inner side surface of the slip.

[0008] The cutter head of the push rod is a V-shaped cutter head.

[0009] The fastening belt is a fastening belt with a metal structure.

[0010] The sealing sleeve is divided into an inner fixing layer and an outer expansion layer.

[0011] The outer expansion layer is a rubber sealing ring that expands when exposed to water.

[0012] By adopting the above technical solution, the beneficial effects of the utility model are:

[0013] The utility model provides a metal soluble bridge plug. After the bridge plug is transported to a designated position in a drilling channel by an external device, the push ring is quickly pushed forward by the external device, the push rod on the push ring moves forward, and the cutter at the front of the push rod cuts the fastening belt. After the fastening belt is cut, the slips are released from the limit, and the spring sheet bounces the slips upward. At this time, the slips are perpendicular to the center pipe, so that all the slips are quickly expanded at the maximum angle to fix the center pipe to the drilling channel; when the push ring moves forward, the plug is pushed and plugged into the rear channel of the center pipe to block the center pipe, so that the slips on the bridge plug are opened and the plug can quickly and effectively block the center pipe synchronously, thereby greatly improving the blocking ability of the bridge plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the slips in the utility model being opened;

[0016] Figure 3 This is a schematic diagram of the structure of the slips in the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the push ring in the utility model;

[0018] Figure 5 It is a structural schematic diagram of the sealing sleeve in the utility model.

[0019] Center pipe 1, push ring 2, slip 3, fastening belt 4, mounting block 5, spring sheet 6, slot 7, push rod 8, cutter 9, support frame 10, plug 11, inner fixed layer 12, outer expansion layer 13, limit block 14. DETAILED DESCRIPTION

[0020] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0021] 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 embodiments described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the utility model.

[0022] like Figure 1-Figure 5 As shown, a metal soluble bridge plug includes a center tube 1, a push ring 2, a slip 3 and a fastening belt 4. A circle of mounting blocks 5 are provided at the rear side of the center tube 1, a limit block 14 is provided on the top of the mounting block 5, and a gap is provided between the mounting blocks 5. The slips 3 are hinged on the mounting blocks 5, and a spring sheet 6 is provided on the inner side of each slip 3, and a slot 7 is provided on the outer side of each slip 3. The fastening belt 4 is fixed in the slot 7 to press the slip 3 onto the center tube 1. When the slip 3 is pressed onto the center tube 1, the spring sheet 6 is in a folded state; the push ring 2 is provided on the rear side of the mounting block 5, and two push rods 8 are symmetrically arranged forward are provided on the push ring 2. The ends of the two push rods 8 are provided with cutters 9, and the cutters 9 are arranged corresponding to the fastening belt 4; a sealing sleeve is provided at the front side of the center tube 1.

[0023] A rear support frame 10 is provided on the rear side of the push ring 2 , and a plug 11 is provided on the support frame 10 . The plug 11 is provided corresponding to the passage of the central tube 1 .

[0024] One end of the spring leaf 6 is fixed to the inner side surface of the slip 3 .

[0025] The cutter head of the cutter 9 of the push rod 8 is a V-shaped cutter head.

[0026] The fastening belt 4 is a fastening belt 4 of a metal structure.

[0027] The sealing sleeve is divided into an inner fixing layer 12 and an outer expansion layer 13 .

[0028] The outer expansion layer 13 is a rubber sealing ring that expands when exposed to water and is used to expand when exposed to water after the bridge plug is set, thereby enhancing the sealing effect. Example

[0029] The metal soluble bridge plug is transported to the designated position of the drilling channel through external equipment, and the push ring 2 is quickly pushed forward by the external equipment. The push rod 8 on the push ring 2 moves forward, and the cutter 9 in front of the push rod 8 cuts the fastening belt 4. After the fastening belt 4 is cut, the slip 3 is released from the limit, and the spring sheet 6 bounces the slip 3 upward, so that the slip 3 and the central pipe 1 are in a vertical state. The slip 3 is quickly expanded to the maximum angle to fix the central pipe 1 to the drilling channel. When the push ring 2 moves forward, the plug 11 is pushed and inserted into the rear channel of the central pipe 1 to block the central pipe 1, thereby realizing the blocking function of the bridge plug. During the setting process, the bridge plug can quickly and effectively expand the slip 3 and block the central pipe 1, thereby realizing the synchronous operation of anchoring and blocking of the bridge plug, thereby improving the anchoring ability and blocking effect of the bridge plug.

[0030] 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 replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A metal soluble bridge plug comprising a central tube, a push ring, slips and a fastening band, characterized in that: A circle of mounting blocks is provided at the rear side of the central tube, a limit block is provided on the top of the mounting block, and gaps are provided between the mounting blocks. The slips are hinged on the mounting blocks, and a spring sheet is provided on the inner side of each slip, and a slot is provided on the outer side of each slip. The fastening belt is fixed in the slot to press the slip against the central tube, and the spring sheet is in a folded state when the slip is pressed against the central tube; a push ring is provided on the rear side of the mounting block, and two push rods symmetrically arranged forward are provided on the push ring, and cutters are provided at the ends of the two push rods, and the cutters are arranged corresponding to the fastening belts; a sealing sleeve is provided at the front side of the central tube.

2. The metal soluble bridge plug according to claim 1, characterized in that: A rear support frame is provided on the rear side of the push ring, and a plug is provided on the support frame. The plug is arranged corresponding to the channel of the central tube.

3. The metal soluble bridge plug according to claim 2, characterized in that: One end of the spring sheet is fixed to the inner side surface of the slip.

4. The metal soluble bridge plug according to claim 3, characterized in that: The cutter head of the push rod is a V-shaped cutter head.

5. The metal soluble bridge plug according to claim 4, characterized in that: The fastening belt is a fastening belt with a metal structure.

6. The metal soluble bridge plug according to claim 5, characterized in that: The sealing sleeve is divided into an inner fixing layer and an outer expansion layer.

7. The metal soluble bridge plug according to claim 6, characterized in that: The outer expansion layer is a rubber sealing ring that expands when exposed to water.

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