摘要
采用常规钻机、利用转盘驱动的简易套管钻井技术由于受钻头寿命的限制,只能用于一只钻头钻至设计井深的情况,为此,研制开发了转盘驱动的可更换钻头套管钻井系统。该系统由起下工具、井下锁定工具串及坐底套管3部分组成。进行套管钻进时,井下锁定工具串锁定在坐底套管上,需更换钻头或井下锁定工具串时,往套管内部下入起下工具并解锁锁定装置,起出井下锁定工具串,更换完毕后,再将井下锁定工具串从套管内送入井底,锁定在套管柱末端的坐底套管上,起下过程中可保持钻井液的循环和钻柱的转动。该系统在吉林油田2口井上进行了试验,井下锁定工具串的下入成功率达到100%,并实现了套管正常钻进,但由于打捞矛无法进入到井下锁定工具串的打捞孔中,致使2口井都没有正常起出井下锁定工具串。详细介绍了可更换钻头套管钻井系统的组成、原理、施工工艺及现场试验情况。
Traditional casing drilling techniques using conventional rigs and driven rotary table can only use one drill bit to drill to the planned depth due to the limit of the drill bit. Therefore, a casing drilling system with retrievable bit driven by rotary table was developed. The system has three parts, including tripping tools, downhole lock tools, and bottom hole casings. The downhole lock tools string are locked on top of bottom hole casing strings during drilling. When the drill bit or lock downhole tools need to be replaced, running tripping tools into casing strings and unlocking, and then tripping out the downhole tool string. After that, the downhole tool string was run into and locked again. Drilling fluids were continuing circulating and drill strings were continuing rotating. The system has been tested on two wells in Jilin Oilfield. The percentage of successful running was 100% and drilling with Casing was obtained. However, the downhole locking tools were not pulled out because the releasing spear was not able to reach the fishing pole of downhole locking tools. This paper introduces in detail several aspects of the assembly of the retrievable drill bit, including the component, principles and operation techniques, and field application re suits.
出处
《石油钻探技术》
CAS
北大核心
2007年第5期18-21,共4页
Petroleum Drilling Techniques
基金
国家高技术研究发展计划(863计划)项目"先进钻井技术与装备"之"套管钻井技术"专题(编号:2006AA06A107)部分研究内容
