Method and device for taking measurements and/or carrying out interventions in a sharply inclined well section and its application to production of seismic profiles

摘要

Method and device for carrying out measurements and/or interventions in a well section which is substantially inclined with respect to the vertical or horizontal with a set of instruments provided at the bottom of a rigid string. In the method, a set or assembly of instruments is positioned or maintained positioned in an extension of the string at the lower end of the string, the assembly being in a first position relative to the end. The assembly and the bottom part of the string are introduced into the well and the assembly is advanced into the well by progressively pushing the end of the string until the assembly reaches a desired position, then the assembly is released and disengaged from a first position and brought into a second position wherein the assembly rests on a wall of the well and wherein it is mechanically decoupled from the string. The connection between the assembly and the string being provided by a flexible line and, thereafter, measurement and/or intervention is carried out.