无隔水管泥浆回收钻井技术控制系统功能设计

Functional design of the control system of riserless mud recovery drilling technology

摘要:

无隔水管泥浆回收钻井技术（RMR）作为双梯度钻井工艺之一，具有绿色环保、井身结构简易、工程成本低和安全程度高等优点。但是RMR作为新兴钻井工艺，虽然国外应用较为成熟，但国内目前尚无工程应用，缺乏相关使用经验。最关键的是RMR控制系统功能复杂，对可靠性、准确性及灵敏性等要求高，面对复杂工况时，要求控制系统能够及时准确的做出应对处理。因此，为发展国内无隔水管泥浆回收钻井技术（RMR），拉近甚至超越国外钻井工艺水平，迫切需要对控制系统做出相对完善的设计。本文针对无隔水管泥浆回收钻井过程中的几类典型工况，分析不同工况下控制系统所具备的功能，设计控制功能具体的实现形式。通过对无隔水管泥浆回收钻井技术控制系统的功能设计与实现的研究，以期为今后同类研究提供有益的借鉴。

Abstract:

Riserless mud recovery drilling technology （RMR）， as one of the dual gradient drilling techniques， has the advantages of environmental protection， simple well structure， low engineering cost and high safety. However， as an emerging drilling technology， RMR has not seen any engineering application currently in China， and there is a lack of relevant field experience， though it is relatively mature in foreign applications. The most important thing is that the RMR control system has complex functions and high requirements for reliability， accuracy， and sensitivity. When faced with complex working conditions， the control system is required to respond promptly and accurately. Therefore， in order to develop the domestic riserless mud recovery drilling technology （RMR）， and to narrow or even surpass foreign drilling technology， there is an urgent need to make a relatively complete design of the control system. In this paper， in light of several typical working conditions in the drilling process with riserless mud recovery， analysis is conducted of the functions of the control system under different working conditions with the design of the specific realization form of the control function. It is desired that the research on the functional design and realization of the control system of the riserless mud recovery drilling technology can provide a useful reference for similar research in the future.