CN-121993083-A - Packer and movable type press cap-protective cap anti-protruding assembly thereof

CN121993083ACN 121993083 ACN121993083 ACN 121993083ACN-121993083-A

Abstract

The invention provides a packer and a movable type press cap-protective cap anti-protruding component thereof, wherein the movable type press cap-protective cap anti-protruding component of the packer comprises an integral press cap anti-protruding component and a split type protective cap anti-protruding component, the integral press cap anti-protruding component and the split type protective cap anti-protruding component are arranged at two ends of a rubber cylinder, the integral press cap anti-protruding component is located between a support ring of the rubber cylinder and the split type protective cap anti-protruding component, a slideway is arranged on the integral press cap anti-protruding component, the split type protective cap anti-protruding component comprises a plurality of petal-shaped bodies arranged in the circumferential direction, a sliding block is arranged on each petal-shaped body, a roller is arranged on each sliding block, and the sliding blocks can move radially along the slideway. The packer may include the movable press cap-cap anti-extrusion assembly described above. The invention has the advantage that the sealing performance of the packer rubber can be improved.

Inventors

YANG LIUQING
ZHAO CHANGQING
ZHENG XU
LIU JINLEI
ZHANG XIWEN
ZENG XIN
CAO QIAOLI
XIE MING
ZHANG YICHAO
PENG CANCAN

Assignees

中国石油天然气集团有限公司
中国石油集团川庆钻探工程有限公司

Dates

Publication Date: 20260508
Application Date: 20241108

Claims (10)

1. A movable pressure cap-protective cap anti-protruding component of packer is characterized in that the protective cap anti-protruding component comprises an integral pressure cap anti-protruding component and a split protective cap anti-protruding component, wherein, The integral type press cap anti-protruding piece and the split type protective cap anti-protruding piece are arranged at two ends of the rubber cylinder, and the integral type press cap anti-protruding piece is positioned between the support ring of the rubber cylinder and the split type protective cap anti-protruding piece; The split protective cap anti-protruding piece comprises a plurality of petal-shaped bodies which are circumferentially arranged, each petal-shaped body is provided with a sliding block, each sliding block is provided with a roller, and the sliding blocks can radially move along the sliding grooves.
2. The movable press cap-guard anti-extrusion assembly of claim 1, wherein the integral press cap anti-extrusion and split guard anti-extrusion are each provided with a porous channel.
3. The movable press cap-protective cap anti-protruding assembly of the packer according to claim 2, wherein 4-20 hole channels are formed in each petal-shaped body.
4. The movable press cap-protective cap anti-protruding assembly of the packer of claim 2, wherein the integral press cap anti-protruding member is provided with 20-100 hole channels.
5. The removable cap-shield assembly of claim 2, wherein the porous channels on the integral cap shield are circumferentially uniform.
6. The packer movable press cap-cap anti-extrusion assembly of claim 2 wherein the porous channel comprises a circular bore.
7. The packer movable press cap-cap anti-extrusion assembly of claim 1 wherein the runner comprises a trapezoidal runner.
8. The movable press cap-cap anti-protruding assembly of claim 1, wherein the split cap anti-protruding member comprises 4-12 lobes distributed uniformly.
9. The movable press cap-protective cap anti-protruding assembly of the packer of claim 1, wherein 1-5 rollers are arranged on the sliding block.
10. A packer comprising a movable press cap-guard anti-extrusion assembly as claimed in any one of claims 1 to 9.

Description

Packer and movable type press cap-protective cap anti-protruding assembly thereof Technical Field The invention relates to the technical field of underground tool manufacturing in the petroleum and natural gas industry, in particular to a packer and a movable pressure cap-protective cap anti-protruding assembly thereof. Background Deep and ultra-deep oil and gas resources are rich, and deep oil and gas reservoirs are always key fields of domestic exploration and development. For example, sichuan basin jolt system lamp shadow group, total oil and gas resources of 2.8-3.0 trillion square, burial depth of 6000-10000 m, wherein the resource amount of burial depth of 8000-10000 m is about 1/2. The existing oil and gas exploration and development are more and more concentrated in deep wells and ultra-deep wells, so that the temperature and pressure born by the packer rubber are higher and higher, and the performance of the packer rubber is higher. Therefore, the packer and the movable press cap-protective cap anti-protruding assembly thereof have important significance. The application number is CN202020844967.9, and the chinese patent of the name "an underground packer seal structure" discloses an underground packer seal structure, and it includes the sleeve pipe, sleeve pipe upper end central point puts the activity outside and cup joints and be provided with middle packing element, middle packing element both sides are provided with limit packing element in the activity of sleeve pipe outside cup joints, limit packing element is kept away from middle packing element one side and is provided with first backing ring in sleeve pipe outside end position activity cup joints. The device is characterized in that the edge rubber barrels on two sides are provided with a group protection back ring, namely a first back ring heat shrinkage material back ring, a second back ring steel wire back ring, a third back ring brass back ring and a fourth back ring low-carbon steel back ring, wherein the third back ring brass back ring and the fourth back ring low-carbon steel back ring are deformed after compression and are clung to the inner wall of a sleeve to form a bowl-shaped protection form, so that under the high-temperature and high-pressure difference environment, the middle rubber barrel and the edge rubber barrel cannot flow out from a gap to cause sealing failure, the whole device bears high temperature and high pressure, and the most critical is to prevent the loss of the middle rubber barrel and the edge rubber barrel at high temperature, and the other is to keep enough positive pressure between the middle rubber barrel and the edge rubber barrel and keep effective sealing. However, the sealing structure of the underground packer is different from the structure of the application, the back ring of the structure is integral and can not radially move along the compression track of the rubber cylinder so as to completely protect the rubber cylinder. Chinese patent application No. CN202320633002.9, entitled "a multi-layered lancing high strength backing ring", discloses a multi-layered lancing high strength backing ring comprising a metal body and a multi-layered backing ring, the multi-layered backing ring head and body being integral, the shoulder portion being a plurality of individual individuals and extending to the tail, the multi-layered backing ring being of a tapered configuration, when subjected to axial pressure, being outwardly spread proximate the sleeve wall or the open hole wall. Can be in the irregular space of cooperation rubber component shutoff tubular column and bore hole wall of a well spare, and when the environmental control is too big, can constantly prop up after the compression and press close to sleeve wall or bore hole wall, provide more perfect protection, solved current back of the body circle can't reach the requirement of superhigh temperature superhigh pressure to can't play effective protection't the problem to rubber seal assembly. However, the multi-layer kerf high-strength back ring is different from the structure of the application, the split back ring is adopted, when the rubber cylinder is compressed, the back ring is effectively opened, but can not move along with the radial expansion of the rubber cylinder, the rubber cylinder can not be completely covered and protected, and the surface of the multi-layer kerf high-strength back ring does not have a liquid passing through a runner for enhancing the compression of the rubber cylinder. Disclosure of Invention The present invention is directed to solving one or more of the problems of the prior art, including the shortcomings of the prior art. For example, it is an object of the present invention to provide a removable press cap-cap anti-extrusion assembly for a packer that improves the sealing performance of the packer packing element. In order to achieve the above purpose, the invention provides a movable pressure cap-protective c