摘要
通常解决连续管在井下遇卡的方法是大力拉拔,断脱后分段打捞,这样易造成连续管报废,同时施工程序复杂且周期较长。为此,研发了热熔式连续管内切割技术。该技术通过电缆将工具下入连续管内卡点附近,通过电缆传输大于500 m A的电流,触发热能发生器内的电热头电阻,产生的热量引燃高能燃料剂,产生高压和强热使其内粒子热运动加剧,进而使所有原子全部电离,利用熔断性进行作业。现场应用结果表明,热熔式内切割工艺解决了连续管遇卡管柱小管径、强弹性、大韧性和无法旋转等打捞难题;避免了大力拉拔和活动解卡带来的连续管塑性变形和屈曲变形等不可逆转的损伤。热熔式内切割工艺为打捞小直径遇卡管柱拓展了思路和方法。
The common solution for coiled tubing downhole sticking is vigorous pulling, and fishing per sec?tion after breaking off?But the operation could easily lead to coiled tubing scrap, and the operation process is com?plicated and time?consumed?To address the issue, a fusing type coiled tubing inner?cutting technology has been developed?The technology uses wireline to convey the tool in the coiled tubing to the sticking point, and transit current of more than 500 mA to trigger an electric heating resistance inside the heat generator?Then, the generated heat ignites the high?energy fuel agent, and produces high pressure and intense heat to increased thermal motion of particles, making all the atoms ionized, thus, performing the operation by fusing?Field application results show that the fusing inner?cutting process could address the coiled tubing fishing issue of small diameter, high elasticity, high toughness and un?rotating, avoid irreversible damage on the coiled tubing like plastic deformation and buck?ling deformation through vigorous pulling and movement of tubing?The conclusions could expand the ideas and methods for fishing small diameter sticking pipe string.
出处
《石油机械》
2016年第5期106-108,共3页
China Petroleum Machinery
关键词
热熔式
内切割工艺
连续管
熔断性
解卡
热能发生器
heat fusing
inner-cutting process
coiled tubing
stick releasing
fishing
electric generator
