PRESSURE TIGHT ENTRY (VERSIONS) Russian patent published in 2009 - IPC E21B33/68 

FIELD: mining.

SUBSTANCE: invention refers to mining, to oil and gas industry, particularly to devices of well head equipment of wells and is intended for pressure tight entry of cable and capillary tube into well. The device consists of a case with partially conic internal surface, of a nut, of a packing elastic bushing (in the first version) with a conic external surface under a seat in the case and one or several axial holes for the cable. Thread is cut on the external surface of the case for connection with the nut having internal circular lug; a metallic bushing and a packing washer with a lock pin preventing turn over are installed between the circular lug and the upper part of the packing bushing; on the internal surface of the case there is cut a slot for the said lock pin; while an additional packing washer is installed under the packing bushing; also the packing bushing has slits for entry of cable during assembling. In the second version the packing elastic bushing has an additional axial hole for a metallic capillary tube; this bushing has thread on ends for connection with the capillary tube made out of elastic material, for example by means of threaded couplings.

EFFECT: facilitating reliable supply of chemical reagent into well through tube.

2 cl, 6 dwg