Patent ID: 7708075
Filing Date: 2010-05-04
Classification: E21B

Abstract:
1. A chemical injection system comprising: a tubing retrievable safety valve having a control line in operable communication therewith, the tubing retrievable safety valve being openable upon a threshold pressure in the control line, the control line including a Y-block; a communication nipple in operable communication with the tubing retrievable safety valve and positioned relative to the tubing retrievable safety valve to be downhole of a flapper closure mechanism thereof when installed in a wellbore; a chemical injection line extending from the Y-block and in fluid communication with the control line and the communication nipple; a chemical injection valve fluidly communicated with the chemical injection line, the chemical injection valve being openable only in response to a pressure in the control line substantially higher than the threshold pressure; and a capillary sleeve receivable at the communication nipple and configured to sealingly convey fluid from the communication nipple to a remote location without affecting operation of the tubing retrievable safety valve.