This book is written based on work experience at the office and the field Some subjects have been taken by the internet and from books The intent of writing this book is to share experience in drilling and completion work technically including a brief overview of cost allocation and HSE Health Safety and Environmental this book is intended for students and society Much remains to be evaluated in this book Hopefully this book is useful for those who read it This book is written based on work experience at the office and the field Some subjects have been taken by the internet and from books The intent of writing this book is to share experience in drilling and completion work technically including a brief overview of cost allocation and HSE Health ...Safety and Environmental this book is intended for students and society Much remains to be evaluated in this book Hopefully this book is useful for those who read it