Catcher TO REMOVE STEM wellhead

摘要

The invention relates to the field of oil industry and can be used in the repair of oil wells. The purpose of the use of the utility model is the repair of oil wells without raising the production string of tubing, reducing costs and time to repair wells. To achieve this purpose the safety device consisting of a casing with an internal conical surface which at the bottom has a conical guide funnel, a certain amount of metal balls held in the chamber. Spool chamber is closed, pressed a spring. The safety device on the downstroke downhole end abuts on ragged wellhead rod. Wellhead rod passes through the shutter at the bottom of the catcher, the conical surface of the housing and presses the end of the spool housing hole for opening rashes beads. When the safety gear during emergency up balls wedge wellhead stem into the conical surface and provide a grip and extraction of the rod. In the case of an unsuccessful capture curtains do not give the balls to fall into the well.