CN-122014151-A - Controllable phase-change metal bridge plug

CN122014151ACN 122014151 ACN122014151 ACN 122014151ACN-122014151-A

Abstract

The invention relates to the technical field of bridge plugs, in particular to a controllable phase-change metal bridge plug which comprises a plugging agent cylinder, a shearing joint, a shell cylinder, a bearing cylinder and a bottom plug which are sequentially and fixedly installed together from top to bottom, wherein the plugging agent cylinder is arranged on the outer side of the shell cylinder, the bearing cylinder comprises an upper joint, a gland, a lower body, a rotary umbrella sheet, a locking pin and a rotary power assisting component, the upper joint is fixedly installed in the center of the upper side of the lower body, and the gland is arranged on the outer side of the upper joint. The invention has reasonable and compact structure and convenient use, and by arranging the rotating frame and the rotating component, the rotating component drives the rotating frame to rotate after the locking pin releases the restriction of the rotating and stretching umbrella sheet, thereby leading all the rotating and stretching umbrella sheets to rotate and stretch out, and guiding columns positioned in the sliding slotted holes guide and limit the rotating and stretching umbrella sheet in the stretching process of the rotating and stretching umbrella sheet, thereby realizing that all the rotating and stretching umbrella sheets radially outwards stretch out to be contacted with the inner wall of the sleeve pipe to form an annular bearing surface, and the invention has the characteristics of stability, reliability and high efficiency.

Inventors

XU YANLIN
LI GUOLIANG
TAN WENBO
JIA WUQIANG
XU XIANGKUN
QI HONGMING
LI LIANG
PANG JIN
ZHANG BAOPING

Assignees

中国石油天然气集团有限公司
中国石油集团西部钻探工程有限公司

Dates

Publication Date: 20260512
Application Date: 20241112

Claims (9)

1. A controllable phase change metal bridge plug is characterized by comprising a plugging agent cylinder, a shearing joint, a shell cylinder, a supporting cylinder and a bottom plug which are sequentially and fixedly installed together from top to bottom, wherein the plugging agent cylinder is arranged on the outer side of the shell cylinder, the supporting cylinder comprises an upper joint, a gland, a lower body, a rotating umbrella piece, a locking pin and a rotation assisting component, the upper joint is fixedly installed in the center of the upper side of the lower body, the gland is arranged on the outer side of the upper joint, a plurality of rotating umbrella pieces which are vertically overlapped in a staggered mode along the circumferential direction are arranged on the upper side of the lower body corresponding to the position below the gland, the rotation assisting component which enables all the rotating umbrella pieces to radially extend outwards is arranged on the upper side of the lower body, a locking hole which is vertically penetrated is formed in the locking hole, and the plugging agent cylinder and the locking pin are made of controllable phase change metal composite materials.
2. The controllable phase change metal bridge plug according to claim 1, wherein the rotating power assisting component comprises a rotating frame, fixing columns, guide columns and rotating components, a rotating ring groove is formed in the upper side of the lower body, the rotating frame is arranged in the rotating ring groove, a plurality of rotating umbrella pieces which are overlapped up and down in a staggered mode along the circumferential direction are arranged on the upper side of the rotating frame, fixing round holes are formed in the inner ends of the rotating umbrella pieces corresponding to the positions of the rotating frame, the fixing columns with the lower ends fixedly mounted on the upper side of the rotating frame are arranged in each fixing round hole, sliding slotted holes are formed in the outer ends of the rotating umbrella pieces, the guide columns with the lower ends fixedly mounted on the upper side of the lower body are arranged in the sliding slotted holes corresponding to the outer end positions of each sliding slotted hole, and the rotating components capable of enabling the rotating frame to rotate are arranged on the upper side of the lower body.
3. The controllable phase change metal bridge plug of claim 2, wherein the rotating assembly comprises a front power assisting assembly and a rear power assisting assembly, the front power assisting assembly comprises a pull rod, a spring seat and a return spring, the pull rod is fixedly arranged on the inner side of the front portion of the rotating frame, the spring seat is arranged on the upper side of the lower body corresponding to the right position of the pull rod, the return spring is fixedly arranged between the pull rod and the spring seat, the rear power assisting assembly is arranged on the upper side of the rear portion of the lower body, and the rear power assisting assembly is identical in structure with the front power assisting assembly and is arranged in a central symmetry mode.
4. The controllable phase change metal bridge plug according to claim 2 or 3, further comprising a locking lug, wherein the locking lug is fixedly arranged on the inner side of the rotating frame corresponding to the position below the locking hole, a jack penetrating up and down is arranged on the locking lug, and the lower end of the locking pin is positioned in the jack.
5. The controllable phase change metal bridge plug according to claim 1,2 or 3, wherein at least two slow flow ring grooves are arranged at intervals up and down on the inner side of the upper part of the supporting cylinder, and slow flow annular platforms positioned in the slow flow ring grooves are arranged on the outer side of the outer shell cylinder corresponding to the positions of each slow flow ring groove.
6. The controllable phase change metal bridge plug according to claim 4, wherein at least two slow flow ring grooves are arranged at intervals up and down on the inner side of the upper part of the supporting cylinder, and slow flow ring platforms positioned in the slow flow ring grooves are arranged on the outer side of the outer shell cylinder corresponding to the position of each slow flow ring groove.
7. The controllable phase change metal bridge plug according to claim 1,2, 3 or 6, wherein the controllable phase change metal composite material comprises a carbon-based metal catalyst, a nonmetal special adhesive and nanoscale metal powder, and is prepared by a combination of a carbonyl method, a high-pressure mixing method and a metal injection molding method.
8. The controllable phase change metal bridge plug according to claim 4, wherein the controllable phase change metal composite material comprises a carbon-based metal catalyst, a nonmetallic special adhesive and nanoscale metal powder, and is prepared by a combination of a carbonyl method, a high-pressure mixing method and a metal injection molding method.
9. The controllable phase change metal bridge plug according to claim 5, wherein the controllable phase change metal composite material comprises a carbon-based metal catalyst, a nonmetallic special adhesive and nanoscale metal powder, and is prepared by a combination of a carbonyl method, a high-pressure mixing method and a metal injection molding method.

Description

Controllable phase-change metal bridge plug Technical Field The invention relates to the technical field of bridge plugs, in particular to a controllable phase-change metal bridge plug. Background In the exploration and development process of oil and gas fields, bridge plugs are used as indispensable underground plugging tools and widely applied to various fields such as oil testing, gas testing, well repairing, testing, hydrocarbon reservoir reconstruction, reservoir plugging and the like. The plugging bridge plug in the oil casing used at present usually adopts a structure of combining an upper slip and a lower slip with a rubber cylinder. When setting, the slips are opened to be meshed with the oil casing, the rubber cylinder is compressed and expanded to be attached to the inner wall of the oil casing to form sealing, and the rubber cylinder is kept in a compressed and expanded sealing state under the clamping action of the upper slip and the lower slip, so that the oil casing is plugged. However, such bridge plugs have problems of complex structural design, and complicated size and specification. Sometimes, even though the outer diameter of the oil casing is the same, bridge plugs with different specifications and sizes still need to be used due to the difference of wall thickness and steel grade, which brings a plurality of inconveniences to site construction. Along with the continuous increase of domestic requirements for oil and gas, the development of oil and gas fields is brought into a brand new stage, and some complex oil and gas reservoirs with high temperature, high pressure, high sulfur content and the like are gradually explored and developed. This places more stringent demands on the downhole tool, which is required to ensure reliable operation over a long period of time in extremely harsh environments. At present, rubber is used as a material of a rubber cylinder of the traditional bridge plug, is easy to age under high temperature and high pressure conditions, and cannot keep long-term reliability in severe environments of complex hydrocarbon reservoirs such as high temperature, high pressure and high sulfur content, so that stress relaxation and other phenomena occur in a sealing rubber cylinder element, the packer is in a down-hole state, and the service performance and the service life of the packer are seriously influenced. Under the background, the metal bridge plug and the soluble bridge plug gradually replace the traditional rubber barrel, the former has the problem of difficult expansion and expansion in the specific use process, and the latter generally adopts aluminum-magnesium alloy and soluble rubber materials, but the latter can form floccules after the rubber barrel is dissolved and is accumulated at a wellhead along with flowback fluid, so that the problems of shaft blockage, long engineering treatment period and high operation cost can be caused. Disclosure of Invention The invention provides a controllable phase-change metal bridge plug, which overcomes the defects of the prior art and can effectively solve the problem that the prior rubber cylinder cannot meet the operation requirement of high temperature and high pressure. The technical scheme is that the controllable phase change metal bridge plug comprises a plugging agent cylinder, a shearing joint, a shell cylinder, a bearing cylinder and a bottom plug which are sequentially and fixedly installed together from top to bottom, wherein the plugging agent cylinder is arranged on the outer side of the shell cylinder, the bearing cylinder comprises an upper joint, a gland, a lower body, a rotating umbrella sheet, a locking pin and a rotation assisting component, the upper joint is fixedly installed in the center of the upper side of the lower body, the gland is arranged on the outer side of the upper joint, a plurality of rotating umbrella sheets which are overlapped up and down in a staggered manner along the circumferential direction are arranged on the upper side of the lower body corresponding to the position below the gland, a rotation assisting component which can enable all the rotating umbrella sheets to extend outwards in the radial direction is arranged on the upper side of the lower body, a locking hole which is penetrated up and down is arranged in the locking hole, and the plugging agent cylinder and the locking pin are made of controllable phase change metal composite materials. The following are further optimizations and/or improvements to the above-described inventive solution: The rotary power assisting assembly comprises a rotary frame, fixing columns, guide columns and a rotary assembly, wherein a rotary ring groove is formed in the upper side of a lower body, the rotary frame is arranged in the rotary ring groove, a plurality of rotary umbrella sheets which are vertically staggered and overlapped along the circumferential direction are arranged on the upper side of the rotary frame, fixing round holes