📋 Tender Overview
Tatarstan. Tatneft is implementing a technology to preserve the parent well after sidetracking. This was announced by the company.A group of drilling specialists has developed a technology that allows you to maintain and return to production the main wellbore after drilling a sidetrack BS.Traditionally after sidetracking the space in the mother casing below the cut out window is filled with cement and there is no more access to it it is eliminated.According to the new technology the parent wellbore is temporarily turned off by a drillable packer plug a retrievable whipstock is installed in the production string and a BS is drilled to the target horizon. Then the wedge is extracted with a special fishing hook a liner is lowered into the sidetrack and cemented using standard technology.Workover crews at any time will be able to remove a part of the liner that enters the parent hole with a pilot cutter. Then drill out the packer plug using a direct layout and thereby provide access to the parent hole. Thus both wells can be operated in the well.
