CN114753781A - Five-stage branch well window connector tool and operation method thereof - Google Patents

Abstract

The invention discloses a five-stage multilateral well window connector tool, which comprises a body and a guide inner sleeve, wherein the guide inner sleeve is arranged on the body; the elastic claw groove is designed in the connector, two ends of the groove are designed with different angles, and the elastic claw of an internal tool is matched with the elastic claw groove to realize the locking of the internal tool; the anti-torque grooves are designed in the connector, are uniformly distributed in the circumferential direction and are matched with anti-torque claws outside a tool in the connector, so that high anti-torque can be realized, and the stability of the connector is improved in the running process of the tool; the guide mechanism is designed outside the connector and is symmetrical, so that the connector tool can be ensured to automatically rotate and align to the direction in the process of running; the middle position of the connector and the same side of the spiral guide structure are provided with an integral windowing structure, so that a tool can be smoothly output in the later period; the guiding inner sleeve is designed in the connector and is characterized in that a symmetrical guiding mechanism is designed, so that the automatic orientation of an internal tool in the process of inserting the connector can be ensured; this patent advantage is simple structure, stability is high, easy operation is swift.

Description

Five-stage branch well window connector tool and operation method thereof

Technical Field

The invention belongs to the technical field of drilling and completion engineering, and particularly relates to a five-stage multilateral well window connector tool and an operation method thereof.

Background

The multilateral well technology can effectively improve the connectivity between an oil gas well and a reservoir, enlarge the oil drainage area, improve the oil flow state section and increase the single well productivity. The implementation of the five-stage multilateral well technology requires a critical tool window connector that can mechanically support and seal the windows of the main and lateral boreholes apart while providing mechanical access for subsequent reentry and production of the main and lateral boreholes.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a five-stage branch well window connector tool.

The invention is realized by the following technical scheme:

a window connector tool of a five-stage branch well comprises a body and a guide inner sleeve;

the upper part of the body is provided with an elastic claw groove and an anti-torsion straight groove, and a windowing window is formed on the wall of one side of the middle part of the body. The guide inner sleeve is arranged below the windowing window in the body.

In the technical scheme, an upper sealing element is arranged on the inner wall of the barrel body of the body above the windowing window.

In the technical scheme, a lower sealing element is arranged on the inner wall of the cylinder body of the body below the windowing window.

In the technical scheme, the outer wall of the body is provided with the spiral guide boss.

In the above technical solution, a guide mechanism is formed on the guide inner sleeve.

A method of operating a grade five multilateral wellhead connector tool, comprising:

an inner bushing is inserted into the connector, an elastic claw of the inner bushing is matched with an elastic claw groove to realize locking of the inner bushing, meanwhile, the other elastic claw of the inner bushing is matched with an anti-torsion straight groove to realize high anti-torsion of the connector, and meanwhile, a spiral boss is arranged on the outer side of the top of the tool to realize radial positioning of the connector, so that a window of the connector completely corresponds to a windowing window; the inner side of the bottom of the tool is provided with a spiral boss, so that the tool is matched with the tool to be positioned in the tool.

Compared with the prior art, the invention has the advantages that:

1. and (3) designing an elastic claw groove: the elastic claw groove is designed in the connector, two ends of the groove are designed to have different angles, and the elastic claw of an internal tool is matched with the elastic claw groove to realize the locking of the internal tool.

2. Designing a torsion groove: the anti-torsion grooves are designed in the connector, are uniformly distributed in the circumferential direction and are matched with the anti-torsion claws arranged outside the tool in the connector, so that high anti-torsion can be realized, and the stability of the connector is improved in the running process of the tool.

3. Connector external guide design: the guiding mechanism is designed outside the connector and is symmetrical, so that the connector tool can be ensured to automatically rotate and align in the direction in the process of descending.

4. The window structure design: the middle position of the connector and the spiral guide structure are designed with the same side to form an integral window structure, so that tools can be smoothly discharged from the window at the later stage.

5. Designing a guide inner sleeve: the guiding inner sleeve is designed inside the connector and is characterized in that a symmetrical guiding mechanism is designed, and the automatic orientation of a tool inside the guiding inner sleeve can be ensured in the process of inserting the tool into the connector.

The advantages are that: this patent simple structure, stability are high, easy operation is swift.

Drawings

Fig. 1 is a schematic cross-sectional structural view of a window connector tool for a five-stage multilateral well according to the present invention.

Fig. 2 is a schematic view of an external view structure at one side of a window connector tool for a five-stage multilateral well according to the present invention.

Fig. 3 is a schematic structural diagram of a guide inner sleeve.

Wherein: the device comprises a body 1, a guide inner sleeve 2, an elastic claw groove 3, an anti-torsion straight groove 4, an upper sealing element 5, a lower sealing element 6, a spiral guide boss 7, a windowing window 8 and a guide mechanism 9.

For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.

Detailed Description

The technical scheme of the invention is further explained by combining specific examples.

Examples

The connector tool of the patent is composed of a connector body 1 and a guide inner sleeve 2, wherein the guide inner sleeve 2 is fixed inside the connector body 1, and a centrally symmetrical guide mechanism 9 is designed to ensure that the guide can automatically rotate to be aligned with the direction in the process of inserting the guide into the connector, as shown in fig. 1.

The upper part of the body 1 is provided with an elastic claw groove 3 and an anti-torsion straight groove 4, and a windowing window 8 is formed on the cylinder wall of one side of the middle part of the body 1. The guide inner sleeve 2 is arranged below the windowing window 8 in the body 1.

In this embodiment, the body 1 is provided with an upper sealing element 5 on the inner wall of the cylinder above the window 8.

In this embodiment, the body 1 is provided with a lower sealing element 6 on the inner wall of the cylinder below the windowing window 8.

In this embodiment, a spiral guide boss 7 is provided on the outer wall of the body 1.

In this embodiment, the guide inner sleeve 2 is formed with a guide mechanism 9.

As described in the above embodiments, the window is preset on one side of the middle of the connector to correspond to the main borehole, so that the main borehole and the branch borehole are communicated.

According to the embodiment, the sealing structures are arranged at the upper and lower positions of the window in the connector, and the window is isolated by matching with the inner lining tool, so that the main well bore and the branch well bore can be isolated in a sealing mode.

When the five-stage branch well window connector tool is used, the inner bushing is inserted into the connector, the elastic claw of the inner bushing is matched with the elastic claw groove to lock the inner bushing, and meanwhile, the other elastic claw of the inner bushing is matched with the anti-torsion straight groove to realize high torsion resistance of the connector. Meanwhile, a spiral boss is arranged on the outer side of the top of the tool to realize radial positioning of the connector, and the complete correspondence between the connector window and the windowing window is realized; the inner side of the bottom of the tool is provided with a spiral boss, so that the tool is matched with the tool to be positioned in the tool.

The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.

Claims (6)

1. A five-stage multilateral well window connector tool is characterized by comprising a body and a guide inner sleeve;

the upper part of the body is provided with an elastic claw groove and an anti-torsion straight groove, and a windowing window is formed on the cylinder wall on one side of the middle part of the body. The guide inner sleeve is arranged below the windowing window in the body.

2. The multilateral well window connector tool of claim 1, wherein: the body is provided with an upper sealing element on the inner wall of the barrel body above the windowing window.

3. The five-stage multilateral well window connector tool of claim 1, wherein: and a lower sealing element is arranged on the inner wall of the barrel body of the body below the windowing window.

4. The multilateral well window connector tool of claim 1, wherein: the outer wall of the body is provided with a spiral guide boss.

5. The multilateral well window connector tool of claim 1, wherein: and a guide mechanism is formed on the guide inner sleeve.

6. A method for operating a five-stage multilateral well window connector tool is characterized in that:

an inner bushing is inserted into the connector, an elastic claw of the inner bushing is matched with an elastic claw groove to realize locking of the inner bushing, meanwhile, the other elastic claw of the inner bushing is matched with an anti-torsion straight groove to realize high anti-torsion of the connector, and meanwhile, a spiral boss is arranged on the outer side of the top of the tool to realize radial positioning of the connector, so that a window of the connector completely corresponds to a windowing window; the inner side of the bottom of the tool is provided with a spiral boss, so that the tool is matched with the tool to be positioned in the tool.

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