assembly 100 of fig3 b being removed from the intersecting well bore 20 the milling assembly 100 is removed from the intersecting well bore 20 so that a plugging material e g cement can be delivered from the intersecting well bore 20 through the penetrated hole 24 and into the cased well bore 10 typically the anchor packer 104 and whipstock 102 are left in the intersecting well bore 20 during cement delivery in some embodiments the whipstock 102 and anchor packer 104 are removed prior to pumping cement fig3 g illustrates a cement delivery assembly 150 inserted into the intersecting well 20 and pumping a plugging material e g cement into the cased well bore 10 once the penetrated hole 24 is formed and the cased well bore 10 and the intersecting well bore 20 are fluidly connected the cement delivery assembly 150 pumps cement into the cased well bore 10 for example cement can be pumped from the intersecting well bore 20 through the penetrated hole 24 formed in the casing wall 16 and the coupling 18 and into the cased well bore 10 cement is pumped until an amount of cement that is sufficient for forming a structurally suitable barrier within the cased bore 10 is delivered for example in some cases cement.