Pressure transmitting cylinder of pressure test survey for oil-water well

• Main Authors: GONGMING JI, HONGYOU LU, GUOLING ZHANG
• Format: Patent
• Language: English
• Published: 17.12.2003
• Edition: 7
• 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 discloses a pressure transmitting cylinder of pressure test survey for an oil-water well belonging to an oil extraction device for petroleum industry. The utility model is suitable for testing downhole pressure of various oil-water wells. A cylinder body of the utility model is composed of an inner pipe and an outer pipe. An annular cavity is arranged between the inner pipe and the outer pipe. An upper conversion joint and a lower conversion joint are arranged at both ends of the outer pipe and are connected with the inner pipe. A piston sleeve and a piston are arranged in the upper conversion joint and the lower conversion joint. When the utility model is used on site, before a user enters a well, the sealing performance of the cylinder body at the upper part of the pressure transmitting cylinder can be tested in a pressure test mode. The utility model has the advantages of easy fabrication and reliable work. The reliability of the pressure transmitting cylinder in a well can be ensured, the accuracy of data can be ensured, and the success rate of a well completing test is increased.