Stuffing box for a fluid production well, and associated surface assembly

摘要

This stuffing box (46) defines a circulation passage (66) of a cable working line (28), a packer (70), and a back-pressure resistant valve (74). The passage (66) extends between an upstream end (62) of the stuffing box (46), intended to be connected to a well, and a downstream end (64). The back-pressure resistant valve (74) is arranged in the passage (66) to prevent, in case of break of the line (28), the back-pressure of a fluid from the upstream end (62) towards the downstream end (64). The or each packer (70) is situated between the upstream end (62) of the stuffing box (46) and the back-pressure resistant valve (74). No packer (70) is arranged between the back-pressure resistant valve (74) and the downstream end (64).

主权项

1. A stuffing box for a fluid production well, the stuffing box defining a circulation passage of a cable working line extending between an upstream end of the stuffing box, configured to be connected to the well, and a downstream end, the stuffing box including at least one packer arranged in the passage to ensure the sealing between an upstream portion and a downstream portion of the passage when the line is inserted in the passage, the stuffing box including a back-pressure resistant valve arranged in the passage to prevent, in case of break of the line, the back-pressure of a fluid from the upstream end towards the downstream end, wherein the or each packer is situated between the upstream end of the stuffing box and the back-pressure resistant valve, no packer being arranged between the back-pressure resistant valve and the downstream end.