Rotate and Bend Connection
In recent years, it is more common to see directionally or horizontally drilled wells then the conventional vertical wells.
Directionally drilled wells will contain controlled build angles required to obtain a target. During these controlled build angles, formation changes can result in undesirable drilled angles of build, and often severe changes in build angles is required to get back on target. Often these large build angles (referred to as Doglegs), are the cause of human error, mechanical error, and formation changes. If the dogleg degree is larger then allowed, it can cause difficulty in liner installation or liner damage through these doglegs. A Dogleg measurement is the change in angle (degree) over a set distance (30 meters or 100 feet). IE: a 15° Dogleg is a directional change of 15° over a 30m / 100’ distance.
The Rotate and Bend connection (RBC) is a special connection that can bend a 30° Dogleg within the connection (12”). By placing the RBC connections within the liner at predetermined depths, where undesirable doglegs exist, will allow easier installation and less chance for liner damage. The RBC connection is designed to meet or exceed the specifications of the liner it will be run with. The RBC connection will be preset at surface, with the required loads to allow the connection to bend. When the set bending loads are exceeded, the connection will bend to a maximum of 30°. If this load is exceeded while rotating, the connection will bend while rotating, and still obtain a seal in the connection.