Patent ID: 6253852
Filing Date: 2001-07-03
Classification: E21B

Abstract:
A well casing junction apparatus for connecting an upper string of casing to a pair of lower strings of casing, comprising:an upper section having a longitudinal axis and being adapted to be connected to the upper string of casing above the apparatus;a pair of branch sections that join each other at a junction with each other and with a lower end of the upper section and extend downward from the upper section for connection to the lower strings of casing;the apparatus being movable due to the application of internal force from a collapsed position to an expanded position in which both of the branch sections are substantially cylindrical; and whereinwhile in the collapsed position, a single depression is located on one side of a lower portion of the upper section and a single depression is located on an opposite side of the upper section, the depressions face in opposite directions; andwhile in the collapsed position, an upper portion of each of the branch sections has an outer side having a single depression that extends downward from one of the depressions from the upper section.