SU1691517A1 - Formation tester - Google Patents

Abstract

The invention relates to the mining industry, namely to the testing of oil and gas wells by formation testers (PI). lowered into the well on the pipes, and with the possibility of passing geophysical equipment on the cable to the studied zone of the formation. The goal is to increase the reliability of the PI operation at the moments of its compression and expansion and to ensure the possibility of pressure equalization above and below the valve. For this purpose, the PI contains a sleeve (H) 10 with slots on the surface, inside of which a valve in the form of a ball 25 with a central channel and side grooves 28 is placed at an angle of 45 °. relative to the central channel. In the lower part, the G 10 is rigidly connected with the movable rod 3. In the upper part of the G 10, through the sleeve 17 with the seals 18, 19, is mated with the fixed rod 21, forming a pressure equalizer. In the slot X 10 installed segment and pushers. They act on the slide blocks 15 in the slots 28, ensuring the ball 25 rotates by 90 ° & at the end of the moment of compression of the PI (valve opening), after equalizing the pressure and closing the valve at the end of the tension of the SP before closing the pressure equalizer. When the valve is open, the IP geophysical equipment on the cable goes down to the area of the test object. 6 Il. J

Description

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Claims (1)

Claim A formation tester, comprising a housing 20, in which hollow rods, upper and lower saddles having brackets, movable and stationary with radial channels, and mounted between them / 3 2613 YU -3 figure 2 26. YU -3 figure 2 lower saddle and sleeve, the latter made with a sleeve with seals, which is installed with the possibility of overlapping radial channels in a fixed hollow rod in its extreme lower position and communication of cavities under and above the ball when moving to the upper position. Figure 5