Hydrostatic setting tool

摘要

A setting tool for use inside a well bore casing having an upper portion, a lower portion, and a wrap spring. The upper portion includes a mandrel coupled to a connecting line. The upper portion is configured to receive an input. The lower portion includes a first sleeve configured translate along an axis of the setting tool. The lower portion is selectively coupled to the upper portion. The wrap spring has a torsional preload and is coupled to the upper portion and the lower portion. The wrap spring is configured to selectively release the lower portion and upon reception of the input, such that the first sleeve is permitted to translate along the axis.

主权项

1. A setting tool for use in a well bore casing, comprising:
an upper portion having a mandrel and configured to receive an input, so as to induce relative motion of the mandrel within the casing; a lower portion having a first sleeve configured to translate along an axis of the setting tool, the lower portion coupled to the upper portion; a power sleeve extending into the upper and lower portions, the power sleeve being threadedly connected to the mandrel; and a wrap spring extending about the mandrel and into an aperture in the power sleeve, the wrap spring being configured to accept a torsional preload to secure the first sleeve to the upper portion by preventing the power sleeve from rotating relative to the mandrel, the wrap spring being configured to selectively release the first sleeve from the upper portion upon reception of the input.