CAJ | 학술논문

针对微小井眼连续油管(CT)滑动钻井技术在井眼中不旋转、井下遇阻严重、送进困难、钻压无法施加等难题,设计了一种微小井眼CT滑动钻井井下电控液压驱动牵引器.该牵引器主要包括上卡瓦支撑与牵引系统、中心滑管总成、控制系统、下卡瓦支撑系统,采用电控液压回路实现钻井液压能牵引驱动,适用于小井眼,灵活性和稳定性好,牵引过程能保证正常的钻井液循环,柔性弯曲适应能力强,能实现双向牵引和断电保护,能顺利下入和取出CT管柱,解决了因井下CT摩阻较大,下入和取出困难、钻压难施加等技术难题.
침대미소정안련속유관(CT)활동찬정기술재정안중불선전、정하우조엄중、송진곤난、찬압무법시가등난제,설계료일충미소정안CT활동찬정정하전공액압구동견인기.해견인기주요포괄상잡와지탱여견인계통、중심활관총성、공제계통、하잡와지탱계통,채용전공액압회로실현찬정액압능견인구동,괄용우소정안,령활성화은정성호,견인과정능보증정상적찬정액순배,유성만곡괄응능력강,능실현쌍향견인화단전보호,능순리하입화취출CT관주,해결료인정하CT마조교대,하입화취출곤난、찬압난시가등기술난제.
@@@@Micro-hole coiled tubing(CT)sliding?drilling?can?improve?development?benefit?and?cost?cutting?for?the?maturing?field,?shale gas, coal seam gas, tight gas and other unconventional gas reservoirs. It can reduce reservoir pollution, protect the environment and have a wide application prospects in China. However its wellbore diameter is very small, the CT drill string cannot revolute in the tiny wellbore,?friction?resistance?of?CT?sliding?drilling?is?so?seriously?that?it?is?difficulty?to?run?back?into?the?well.?The?drilling?weight?can't?apply?and?even?happen?to?sticking?accidents.?This?has?directly?influenced?the?application?and?popularization?of?micro-hole?CT?sliding?drilling technology. According to the present research situation of tractor at home and abroad, a kind of micro-hole CT sliding drilling tractor by electronic controlled hydraulic drive is designed. The tractor mainly includes a top slips support and traction system, a central sliding?tube?assembly,?a?control?system?and?a?bottom?slip?support?system.?The?drilling?fluid?hydraulic?energy?drives?its?tractor?by?elec-tronic?control.?The?tractor?is?suitable?for?micro-hole?underground?work?with?good?flexibility,?good?stability?and?strong?flexible?bending?ability.?The?tractor?can?provide?normal?drilling?fluid?circulation,?can?realize?two-way?traction?and?power-off?protection?and?make?a?trip?for?CT?string.?The?difficult?technical?problems?of?CT?sliding?resistance?will?be?solved?for?tripping?CT?string?well?by?the?tractor,?which?will promote the micro-hole CT sliding drilling technology development.