New Dual-Side Derrick and Supporting System Based on Fixed Drilling Platform

Yang XiangqianGuo Hua ZhangFu Du Wenjie （CNOOCResearchInstituteCo.，Ltd.）

Abstract：Due to limited internal space，the arrangement of automated equipment on conventional derrick of traditional offshore platform becomes difficult.The nippling upand down ofcasing and tribble needs tobe carried out on the same monkey board，resulting in crossoperation and low overall eficiency.At present，the hoisting gear of drilling rig is only equipped with one drawworks，resulting in severe wear and tearof driling lineon one side during operation.When the drawworks gets out of order，the operation needs to wait for maintenance，further reducing the operating eficiency.To solve these problems，a new dual-side derrick and supporting system were proposed.The new derick adopts a door-type structure，significantly increasing the internal space of the derrick， meting the installation requirements of string handling equipment，andachieving eficienttribbleoperation simultaneously.The double monkey board layout is combined with the design of retractable top drive，making the nippling up of casing and other preparation be conducted onthe other monkey board while performing driling operation，thereby improving the operating eficiency.The redundancy design of doubledrawworks not only improves thereliabilityof theequipment，but alsosignificantly improvesthedriling efficiency.Through scaledmodel test， the superiorityof the new derrick system in functionand performance was verified.The experimental results show that the equipment such asautomatic catwalk，pipe-lifting manipulator and iron roughneck run smoothly on the new derrick，and can complete various operations eficiently.The new dual-side derrick and its supporting system significantly improve the operating efficiencyand safetyof the drilling platform，which isof great significance for promoting the intelligent and efficient development of offshore drilling equipment.

Keywords：marine drilling platform;dual-side derrick；string handling equipment；double drawworks；drill ingefficiency；retractable topdrive

0 引言

全球对石油资源的需求日益增长，陆地资源的逐渐枯竭促使人们加快开发海洋石油资源。因此，如何以较低的成本获得更安全、高效的海洋钻井技术，已成为全球研究的重点[1-2]。传统海洋钻井平台的常规套装井架内部空间受限，接、卸立根作业在井架前侧进行，与顶驱作业存在交叉，影响作业效率并存在安全隐患[3]。管柱自动化系统作为一种有效手段，不仅可以提高钻井效率，还能减轻工人劳动强度和提升作业安全性[4-7]。其中，门形井架因其结构轻巧和占地面积小的特点，已成为管柱自动化系统中使用较为广泛的井架[8]。

国外海瑞克公司在2010年推出了TI-350T全液压双作业面钻机，该机型通过液压机械手臂直接举升钻柱至钻台面，并利用液压顶驱连接钻柱，省略了二层台，从而提高了效率和安全性[9]。国内海洋地质10号钻探系统的门形井架使用2个液缸作为提升机构，省略了传统的游吊系统[10-11]。但这些井架的缺点是均未配套二层台，起下钻时钻具需与地面交接，单根作业效率及油缸提升钩速均较低，且受限于绞车快绳速度，大钩速度难以提高。同时，单绞车技术已成为提高钻井效率的瓶颈，发生故障时，只能停止作业等待维修，影响作业效率。目前，国内厂商虽然可以提供部分管柱自动化处理单元设备，如动力猫道和二层台排管机械手等，但受限于平台或井架内部空间，管柱自动化系统设计效率依然较低[12-13]

为解决上述问题，提出一种新型双作业面井架及其配套系统。……