Wellhead packer comprises hollow shaft with a sealing element outside, a lower support, a lower sub with a lower radial hole
	NURULLIN I Z; TAGIROV R I; LUKONIN M A
	2024-05-22
专利权人	TATNEFT STOCK CO (TATN-Non-standard)
申请日期	2024-05-22
专利号	RU2830839-C1
成果简介	NOVELTY - Invention relates to the oil industry and is intended for temporary shutting off of a well shaft during insulation works during operation and overhaul of wells, and survey of formations. Wellhead packer includes a hollow shaft with a sealing element outside, a lower support, a lower sub with a lower radial hole below the sealing element, structural elements covering the holes and made with possibility of destruction at a certain excess pressure inside the hollow shaft. Sealing element is made in the form of a self-sealing collar, which does not pass from top to bottom, above which there is an upper sub with an upper radial hole. Upper and lower holes are closed by upper and lower structural elements, respectively, lower of which is made with possibility of destruction by excess pressure, which is 10-15 % more than for upper one, which are used to equalize pressure in order to exclude spillage and for transfer to transport position of sealing collars by means of pumping to below-packer area. Below the lower sub inside the hollow shaft there is a valve seat for a ball dropped from the wellhead, and the lower support is made in the form of a streamlined nozzle located from below on the extension and made with possibility of interaction with the well bottom, and unit of centralisers, made with possibility of interaction with upper end of narrowing of wellbore in case of its presence and exclusion of excessive axial displacement of packer at pressure drop, by means of resting on beginning of filtering part of string, which diameter is less than production string. USE - Oil industry. ADVANTAGE - Simplification of design and increase of its reliability due to exclusion of movable precisely adjusted parts. 1 cl, 5 dwg
IPC 分类号	E21B-033/12
国家	俄罗斯
专业领域	化学化工
语种	英语
成果类型	专利
文献类型	科技成果
条目标识符	http://119.78.100.226:8889/handle/3KE4DYBR/16647
专题	中国科学院新疆生态与地理研究所
作者单位	TATNEFT STOCK CO (TATN-Non-standard)
推荐引用方式 GB/T 7714	NURULLIN I Z,TAGIROV R I,LUKONIN M A. Wellhead packer comprises hollow shaft with a sealing element outside, a lower support, a lower sub with a lower radial hole. RU2830839-C1[P]. 2024.

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