120 to substantially form a seal in the annular space between tubing 120 and the wall of open hole 125 where there are two or more elements 115 they may be spaced at various intervals along the length of the packer with the various spacings between adjacent elements 115 being the same or different elastomeric expanding elements 115 may be made of any suitable material provided that the desired amount of expansion and sealing is obtained suitable materials may include metals thermoplastics thermosets composites and the like non limiting commercial examples of suitable materials include nitrile viton fluorel aflas and teflon running assembly 112 is comprised of connector 110 shown as polished bore receptacle 110 and a pig launcher 145 positioned in casing 105 below lateral opening 122 is plug 140 which supports whipstock 135 which serves to guide and direct packer 200 through opening 122 into open hole or side tracked well 125 the method of inserting expanding packer 200 into side tracked well 125 requires first ensuring that the well bore fluid is conditioned then attaching at the earth 39 s surface 250 a screen 130 to expanding packer 200 which in turn is attached to running assembly 112 which is then attached to the end of tubular work string 102 via the polished bore receptacle 110 the sequence of insertion begins with screen 130 down existing well casing 105 followed by expanding packer 200 followed by running assembly 112 finally followed by work string 102 in more detail screen 130 is pushed against.