Pressure relief device for coring tool

• Main Authors: LIU BIN, HU PAN, DENG YUANZHOU, CHEN LI, WANG ZHI
• Format: Patent
• Language: Chinese; English
• Published: 09.11.2011
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model relates to a pressure relief device for a coring tool, which belongs to the manufacturing technical field of petroleum and gas coring equipment and comprises an elevation device and a plug mechanism, wherein the front and the back of the elevation device are respectively connected with a handle and an elevation joint; the plug mechanism comprises an external square joint and a pressure relief plug; both ends of the external square joint are respectively provided with an external thread connecting cap and an external hexagonal connecting rod; and both ends of the pressure relief plug are respectively provided with an internal hexagonal counter bore and a seal head with a thread. According to a design method of firstly relieving pressure and secondly carrying out disassembly, the utility model provides the pressure relief device for the coring tool, which is convenient for relieving the pressure. The problem that a balance piston bounces out to hurt people because the pressure is suddenly reli