An offshore oil and gas test string control double valve
A technology for testing pipes and oil and gas, which is used in wellbore/well valve devices, wellbore/well components, buildings, etc., and can solve the problems of complex structure, easy failure of mechanical springs, and not suitable for the narrow space requirements of downhole pipe strings.
Active Publication Date: 2020-02-14
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
The existing underwater test tree safety valve is generally a double ball valve structure with pumping function, its structure is complex and difficult to process
In addition, valves generally use conventional mechanical springs as failure protection devices, which are not suitable for the narrow space requirements of downhole strings, and mechanical springs are prone to failure after long-term use
Method used
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[0031] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0032] Such as Figure 1~3 As shown, the present invention includes a cylindrical casing 1 with both ends open, and the casing 1 is provided with a flap valve part 2 and a ball valve part 3 located below the flap valve part 2 . The flap valve part 2 includes a cylindrical flap valve seat 21 with both ends open. There is a passage for liquid to circulate inside the flap valve seat 21. The flap valve seat 21 closes the passage through a flap valve device 22 equipped with a nitrogen spring. The ball valve portion 3 includes a ball valve upper support 31 and a pumping support 32 in the shape of an inverted hollow boss. The pumping support 32 is arranged below the ball valve upper support 31. The ball valve upper support 31 and the pumping support 32 A ball valve spool 33 is rotated between them, and a U-shaped groove 335 is provided on the side of the ba...
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The invention relates to an ocean oil-gas testing pipe column control dual valve. The ocean oil-gas testing pipe column control dual valve is characterized in that the ocean oil-gas testing pipe column control dual valve comprises a shell which is in a cylindrical shape which are open in the two ends, and the shell is internally provided with a flap valve part and a ball valve part located below the flap valve part; the ball valve part comprises a ball valve upper supporting seat which is in an inverted hollow boss shape and a pump through supporting seat, the pump through supporting seat is arranged below the ball valve upper supporting seat, and a ball valve element is rotatably arranged between the ball valve upper supporting seat and the pump through supporting seat; a U-shaped grooveis formed in the side edge of the ball valve element, a ball valve lower supporting seat is arranged below the pump through supporting seat, and a ball valve piston with cylindrical openings in the two ends is slidably arranged between the outer walls of the small-diameter end of the ball valve upper supporting seat, the ball valve element and the small-diameter end of the pump through supportingseat and the inner side wall of the shell; and a pushing shaft matched with the U-shaped groove is rotatably arranged on the inner side wall of the ball valve piston in a vertical sliding mode, a nitrogen spring is arranged in the ball valve piston, and the ball valve piston slides under driving of the nitrogen spring to enable the ball valve element to rotate to open and close a channel in the ball valve part.
Description
technical field [0001] The invention relates to a control double valve for an offshore oil and gas testing string, and belongs to the technical field of equipment for offshore oil and gas exploration and development. Background technique [0002] At present, the intensity of global offshore oil and gas development is increasing year by year, and the proportion of deep-water oil and gas production in the world's oil and gas production is also gradually increasing. With the worldwide competition for deep-water oil and gas exploration and development, the safety requirements for offshore oil and gas development are also increasing. come higher. In the process of deepwater oil and gas exploration and development, when operating on floating drilling devices such as semi-submersible platforms or drilling ships, the platform will undergo movements such as heave, pitch, and roll due to the influence of sea wind, waves, and currents. The associated test or completion string moves ac...
Claims
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IPC IPC(8): E21B34/04
CPCE21B34/045E21B2200/04
Inventor 何玉发许亮斌周建良刘清友唐洋张玉亭王国荣姜智博李紫晗李旺舒将军
Owner CHINA NAT OFFSHORE OIL CORP