CN-224228642-U - Half-open split composite lock sleeve structure capable of being sleeved and milled

CN224228642UCN 224228642 UCN224228642 UCN 224228642UCN-224228642-U

Abstract

The patent application belongs to the technical field of oil well engineering, and in particular relates to a half-open type split composite lock sleeve structure capable of being sleeved and milled, which comprises an outer sleeve body and an inner sleeve body, wherein the outer circle of the outer sleeve body is provided with threads connected with an outer sleeve of a packer, and the inner side of the outer sleeve body is provided with an installation cavity; the inner sleeve body is coaxially arranged in the mounting cavity of the outer sleeve body, the inner wall of the inner sleeve body is provided with inner teeth meshed with the central tube, the outer sleeve body is made of a milling-capable material, the inner sleeve body is made of a high-strength material, the same lock sleeve has the dual performance of high-strength meshing and efficient milling and releasing, and the outer sleeve body can be rapidly milled and removed when the lock sleeve is released, so that the milling efficiency is improved.

Inventors

YANG MINGHUI
HUANG FEIYUE
Nurzati Ilzati
ZHANG TAO
YU HAILONG
ZHANG SHIJIE
XUE YANG
Rexiding Abulimiti
Bilali Aizi River

Assignees

克拉玛依市红都有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260409

Claims (2)

1. The utility model provides a can overlap and mill semi-open type split composite lock sleeve structure which characterized in that: The inner sleeve body is coaxially arranged in the mounting cavity of the outer sleeve body, the outer sleeve body is in interference fit with the inner sleeve body, and the inner wall of the inner sleeve body is provided with inner teeth meshed with the central tube; the outer sleeve body is made of a milling material, and the inner sleeve body is made of a high-strength material; The high-strength material is alloy steel or nickel-based alloy, and the milling-capable material is aluminum alloy, glass fiber reinforced epoxy resin or carbon fiber reinforced epoxy resin; The outer sleeve body is formed by two half cylinders, mounting plates are arranged on the upper part and the lower part of the two half cylinders, the two groups of rotation preventing holes are threaded holes and are respectively arranged on corresponding mounting plates, and when the outer sleeve body is mounted, the corresponding mounting plates are overlapped and are mounted into the two corresponding rotation preventing holes through screws for fixing.
2. The half-open type composite lock sleeve structure capable of being sleeved and milled according to claim 1, wherein: the outer circle of the inner sleeve body is provided with an annular groove for injecting glue.

Description

Half-open split composite lock sleeve structure capable of being sleeved and milled Technical Field The utility model relates to the technical field of oil well engineering, in particular to a half-open type split composite lock sleeve structure capable of being sleeved and milled. Background In oilfield completion and workover operations, the packer is a critical downhole tool to achieve interval isolation, separate water flooding, fracturing acidizing, and the like. The lock sleeve (or locking mechanism) is used as a core component of the packer and bears the functions of axial locking and torque transmission after setting, and the reliability and the processibility of the structure directly influence the safety and the working efficiency of the tool. In the prior art, as disclosed in Chinese patent CN103334713A, a cannula packer is mainly composed of an upper jacket, a piston, a lock spring, a connecting sleeve and other metal parts. The locking mechanism realizes the locking after setting through the matching of the locking teeth and the locking springs arranged on the periphery of the piston, and the locking mechanism is integrally processed by adopting a metal material and has higher meshing strength and bearing capacity. Meanwhile, when the packer is released, the packer can be released by adopting the modes of throwing balls, holding pressure and lifting upwards, if the packer fails, the components such as the upper cone, the barrel-shaped slips and the like are damaged in a drilling and milling mode, and the releasing is realized. However, the prior art still has the defects that when the packer is required to be drilled, milled and unlocked, the intubation sealing mechanism is required to be taken out in a forward rotation mode, and then the sleeve milling cylinder is put into the sleeve milling cylinder to drill out parts such as an upper cone, a barrel-shaped slip and the like, so that the operation steps are complex. Disclosure of Invention In order to overcome the defects of the prior art, the utility model aims to provide a half-open type split composite lock sleeve structure capable of being sleeved and milled, so that the same lock sleeve has the dual performance of high-strength engagement and high-efficiency sleeve milling and unlocking, and an outer sleeve body can be rapidly milled and removed during unlocking, so that the sleeve milling efficiency is improved. The technical scheme adopted by the utility model is as follows: the semi-open type split composite lock sleeve structure capable of being sleeved and milled comprises an outer sleeve body and an inner sleeve body, wherein the outer circle of the outer sleeve body is provided with threads connected with an outer sleeve of a packer, and the inner side of the outer sleeve body is provided with a mounting cavity; the outer sleeve body is made of a milling material, and the inner sleeve body is made of a high-strength material; The high-strength material is alloy steel or nickel-based alloy, and the milling-capable material is aluminum alloy, glass fiber reinforced epoxy resin or carbon fiber reinforced epoxy resin; The outer sleeve body is formed by two half cylinders, mounting plates are arranged on the upper part and the lower part of the two half cylinders, the two groups of rotation preventing holes are threaded holes and are respectively arranged on corresponding mounting plates, and when the outer sleeve body is mounted, the corresponding mounting plates are overlapped and are mounted into the two corresponding rotation preventing holes through screws for fixing. Compared with the prior art, the utility model has the beneficial effects that: 1. The outer sleeve body is made of a milling material, when the blocking occurs underground and needs to be subjected to milling and unlocking, the outer sleeve body can be rapidly milled and removed to form a definite preferential damage path, the milling efficiency is improved, the inner sleeve body is made of a high-strength material and is specially used for bearing high contact stress and torque transmission at the meshing position of the inner teeth and the central tube, the strength and reliability of the locking mechanism are ensured, the split type structure is adopted, the lock sleeve is split into the independent outer sleeve body and the inner sleeve body, the function separation design is realized, the differential design of the inner sleeve material and the outer sleeve material is realized, the same lock sleeve has the dual performance of high-strength meshing and high-efficiency milling and unlocking, and the technical contradiction that the traditional integral metal lock sleeve is difficult to consider both is overcome. 2. The upper part and the lower part are respectively provided with a mounting plate, the mounting plates are correspondingly overlapped to form multipoint connection when being mounted, the structural strength and the coaxiality of the folded outer sleev