the principles of the present invention for example smaller sized liner strings may be used in some circumstances if the liner strings are installed through the casing splitter 12 referring additionally to fig2 a cross sectional view of the casing splitter 12 embodying principles of the present invention is representatively illustrated the casing splitter 12 includes a cylindrical housing 40 having an outer diameter somewhat smaller than the inside diameter of a nominal 18 565 u2033 wellhead a standard 13 u215c u2033 threaded casing connection 42 is formed in the top of the housing 40 at an end of a main bore 44 formed in the housing two parallel 8 u00bd u2033 diameter bores 46 48 are formed extending upwardly from the bottom of the housing 40 the bores 46 48 preferably share a common wall 52 having a thickness of no more than 0 435 u2033 a flush joint threaded connection 50 may be provided in the case described above wherein a casing string is initially connected to the bottom of the casing splitter 12 if the liner strings are connected to the casing splitter 12 after it is installed in the well hangers or other devices may be used to hang the liner strings in the bores 46 48 without the need for threaded connections note that a particular benefit of the parallel arrangement of the bores 46 48 in that case is that the bores may be made as long as needed to provide a secure and adequately sealed connection between the casing splitter and the liner strings recesses 53 may be machined outwardly from.