METHOD FOR DRILLING HORIZONTAL WELLS Russian patent published in 1994 - IPC

FIELD: well drilling. SUBSTANCE: method includes drilling of main and additional wells, installation of electrode in main well, and setting up of electromagnetic field in surrounding rocks, measurement from additional well of field parameters and determination of relative position of main and additional wells by measurements results. Additional well is drilled from points of design bottom hole of main well, and after main and additional wells reach half the distance between their wellheads, further drilling of main and additional wells is carried out along wellbore of oncoming well. Equipment located in well with head parts consisting of rock cutting tool, deflecting tool, instrument for measuring parameters of electromagnet field and electrode. EFFECT: higher efficiency. 3 dwg