自適應鉆桿扭矩控制系統
自適應鉆桿扭矩控制系統
發布時間:2015-04-09 09:17:57

    粘滑振動是一種典型的非線性自激振動,是鉆桿在鉆井過程中面臨的最為常見的危害,發生概率高達40%。是造成鉆桿和鉆具組合疲勞甚至斷裂,鉆頭磨損的主要原因。粘滑振動還會導致鉆頭偏離期望的鉆井方向,或者損壞井壁使井壁坍塌。粘滑振動過程中鉆頭轉速瞬間達到很大值,扭矩波動也很大。

 

   軟扭矩控制是一種針對粘滑振動進行主動控制的方法,能夠有效地抑制粘滑振動,基于頂部驅動鉆井技術的地面控制技術,硬件結構簡單,無需添加任何井底設備,與現有變頻器頂驅PLC控制系統無縫集成,變頻器與軟扭矩控制器通過CAN總線進行連接,變頻器能夠將驅動電機的當前轉速和扭矩反饋到軟扭矩控制器,軟扭矩控制器能夠將控制轉速傳輸到變頻器對鉆桿進行控制。

 

Soft torque control

The stick-slip vibration is a typical Nonlinear self-excited vibration, which is always met while drilling, and highly 40% probability. It is the main cause for drill pipes and strings damaged, drill bit worn, and it also make bit deviate its expected drilling direction, or damage well wall. The rotary speed of drill bit reach the max., and more vibration while stick-slip vibration.

 Soft torque control is a effectively method to control stick-slip vibration, which is based on ground control technology of TDS drilling. Without adding any bottom equipments, its simple construction is assembled seamless with transformer PLC control system, and transformer is connected to soft torque controller through CAN cable, then transformer feedback current rotary speed and torque of motor to soft torque controller, which transfer instruction to transformer to control the drill pipes.

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