The utility model provides a downhole multi-purpose recoverable liner pipe packer, which aims to meet the requirements of internal and external pressure resistance and long-term effective sealing performance for repairing damaged downhole casing lining. Through the innovation of sealing contact surface and the combination of composite structure and new materials, a more effective sealing performance is realized. Reliable sealing effect, including a prominent technical feature is that the seating and suspension locking structure has been modified to make it have a reliable seating and suspension performance, the new assembly structure also has the need to be able to safely and quickly unlock the entire liner after one-off another prominent; The technical feature is that the switchable knuckle attached to the liner pipe can be opened and closed pertinently to the oil and gas reservoir, and the purpose of controlling the oil and gas reservoir effectively can be realized by one operation. Because of adopting the switching knuckle matching with the API standard oil pipe thread, the operation connection is very convenient and the whole operation flow is very convenient. Cheng can be successfully completed by means of minor repairs. Its high-efficiency and low-cost operating conditions are in line with the current low oil price period, and it has a good application prospect.
【技术实现步骤摘要】
井下多用途可回收内衬管封隔装置
本技术属于油气开采井下套管修复领域,尤其涉及一种井下多用途可回收内衬管封隔装置。
技术介绍
油气开采的通道由下入井下的生产套管构成,然而随着开采年数的增加,井下套管受活跃地层蠕动以及地下矿化水的侵蚀,会出现不同程度的损坏现象,如果出现穿孔类损坏,将直接影响到井下油气的正常开采,这时就需要采用相应的内衬管修复技术对其进行修复作业。然而上天容易,入地难。对深入井下几千米的损坏套管井段进行修复作业的难度非常大,虽然相配套的修复工艺有很多,但真正能修复好的成功率很低,而且封隔密封的有效期也不长,综合分析得出的原因是:由于用于修复的内衬管与井下套管间的密封结构不合理,从而造成密封性能不达标。这个技术难点是公知的,然而受井下特殊工况的制约,又不容易克服。在一个固定尺寸的套管内下入内衬管,要保证内衬管的物理性能,那么其内径必然要缩小,而内径缩小后在需要下大直径作业工具时就会遇阻而不能通过,只有取出修复用内衬管才能完成所需作业,另没能实现有效封隔的修复用内衬管更需要及时取出,然而目前所采用的套管修复用内衬管都没有可回收设计,取出时需要上大型作业设备 ...
【技术保护点】
1.一种井下多用途可回收内衬管封隔装置,其特点是,由包括液压做功总成、复合悬挂密封总成、可开关短节总成、多功能作业短节总成四个子总成,与自锁扩胀头、内衬管及输送管具组成:a)液压做功总成(1)主要由工作液缸(2)、中心拉杆(3)、弹性挂拉头(4)、调整短节(5)和转换短节(6)组成;b)复合悬挂密封总成(7)主要由橡胶环(8)、复合密封环(9)、悬挂爪钉(10)、防脱销钉(11)和双梯形母扣(12)构成;c)可开关短节总成(13)主要由外筒(14)、内经向旋转环(15)、防护环套(16)、外筒带通孔(17)、内经向旋转环带通孔(18)、对接键(19)、90°限位销钉(20) ...
【技术特征摘要】
1.一种井下多用途可回收内衬管封隔装置,其特点是,由包括液压做功总成、复合悬挂密封总成、可开关短节总成、多功能作业短节总成四个子总成,与自锁扩胀头、内衬管及输送管具组成:a)液压做功总成(1)主要由工作液缸(2)、中心拉杆(3)、弹性挂拉头(4)、调整短节(5)和转换短节(6)组成;b)复合悬挂密封总成(7)主要由橡胶环(8)、复合密封环(9)、悬挂爪钉(10)、防脱销钉(11)和双梯形母扣(12)构成;c)可开关短节总成(13)主要由外筒(14)、内经向旋转环(15)、防护环套(16)、外筒带通孔(17)、内经向旋转环带通孔(18)、对接键(19)、90°限位销钉(20)、双梯形公扣(21)和双梯形母扣(12)构成;d)多功能作业短节总成(26)主要由弹性伸出爪(27)、高压液流喷...
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