clamped the id of the cylindrical sleeve formed by the saddle halves 21 and 22 is slightly larger than the od of the production pipe 10 thus when the saddle is clamped and sealed around the pipe a thin annular space 34 is provided between the saddle and the production pipe and bounded above and below by the upper and lower o ring seals 27 and 28 one or both of the saddle halves 21 or 22 is provided with a lower fill port 35 and an upper relief port 36 liquid epoxy or another suitable hardenable sealing material is injected into the fill port 35 until the entire annular space 34 is filled with epoxy as evidenced for example by material bleeding out the relief port 36 the relief port 36 is then plugged with a high pressure gauge e g 10 000 psi and additional epoxy is injected to pressurize the unhardened material in the annular space to reduce or eliminate air bubbles and assure complete filling the injection pressure may be raised to for example 5 000 psi and maintained until the epoxy is cured referring also to fig8 an assembly for drilling reaming finishing and sealing a valve plug hole through the saddle sleeve epoxy layer and production pipe is positioned in the bore 29 of the access chamber 24 the assembly is rotated and advanced axially by an apparatus which will be described in greater detail hereinafter the drill 38 includes a small diameter pilot drill 40 which may be positioned to drill directly into the plug previously inserted in the initial pressure test hole but this is not necessary the pilot drill is followed by.