双岩心爪取心工具的研究与应用.pdf

第 38 卷 第 4 期 石 油 钻 采 工 艺 Vol. 38 No. 4 2016 年 7 月 OIL DRILLING PRODUCTION TECHNOLOGY July 2016 1000 – 7393 2016 04– 0442– 04 DOI: 10.13639/j.odpt.2016.04.007 文章编号： （ ） 　　　 双岩心爪取心工具的研究与应用 向峰 大庆钻探工程公司钻井工程技术研究院 引用格式：向峰 . 双岩心爪取心工具的研究与应用［J ］. 石油钻采工艺，2016 ，38（4）：442-445. 摘要：复杂地层一般是指裂缝发育，软硬互层，胶结性、稳定性及强度较差的地层，在对该地层进行取心施工时，一直存在 撸心、掉心、岩心收获率低等问题。依据复杂地层的特点，研制了双岩心爪取心工具，该工具结合了自锁式取心工具与加压式取 心工具的优点，在软地层割心时，可以通过加压式岩心爪将岩心割断并封堵内筒，防止撸心、掉心；在硬地层割心时，启动自锁 式岩心爪，楔入岩心，将岩心割断。现已在大庆地区进行了两口井的现场应用，应用表明，该工具有良好的地层适应性，工艺操 作简单，成本低，能够有效提高复杂地层取心收获率指标，保证化验分析的准确度，为油田的高效开发提供可靠的地质依据。 关键词：复杂地层；取心；收获率；双岩心爪 中图分类号：TE244　　　文献标识码：B Development and application of coring tools with double core catchers XIANG Feng , , , , Drilling Engineering Technology Research Institute CNPC Daqing Drilling Exploration Engineering Corporation Daqing Heilongjiang 163413 China Citation: XIANG Feng. Development and application of coring tools with double core catchers ［J ］. Oil Drilling Production Technology, 2016, 38(4): 442-445. Abstract: Complex formations refer to those with abundant fractures, alternating soft and hard layers, and poor cementation, stabil- ity and strength. Coring operations in complex formations often encounter such problems as core ripping, core disengagement and low core recovery. In light of features of complex formations, a coring tool with double core catchers has been developed. With combined advantages of self-locking and pressurized coring tools, the newly-developed coring tool may effectively cut the core an