High-pressure pipe string for continuous fusion drilling of deep wells, process and device for assembling, propelling and dismantling it

摘要

A high pressure pipe string for continuous fusion drilling of deep wells which houses supply lines, measurement instrumentation and control wiring of the drilling device. It has at least two shell elements forming two halves of a pipe, and these parts are assembled into a smooth, tight, and compression and tension resistant pipe. In a process for assembling, propelling and subsequently dismantling a high-pressure pipe string for continuous fusion drilling of deep wells, the supply lines, the measurement instrumentation and the control wiring are fed to the boring head in a continuous manner. The supply lines, the measurement instrumentation and the control wiring are encased in a tight, compression and tension resistant high-pressure pipe string having several parts, the assembled pipe string being continuously propelled downward into the boring. The device for the execution of one of these processes has one storage carrousel for each of the supply lines, on which the supply lines are wound. Such a storage carrousel has a circular, rotating and motor-driven platform designed to hold the wound up supply lines. It also has a multi-level assembly tower housing the elements for assembling the pipe segments, to propel the pipe string downward into the boring, and to subsequently retrieve and dismantle the pipe string.