A kind of synchronous split mining reversing valve
A reversing valve and valve seat technology, which is applied in the fields of fluid production, earth-moving drilling, wellbore/well valve device, etc. The effect of reducing waste liquid discharge, reducing heat loss and reducing safety hazards
Active Publication Date: 2016-10-19
PETROCHINA CO LTD
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Problems solved by technology
[0004] The non-injection-production dual-purpose pump structure needs re-pumping and mechanical recovery after the self-spraying is completed, and in the process of pumping down, the workover and drainage operations will inevitably cause the wellhead pressure to return to zero, steam loss, that is, a large loss of injected heat, resulting in Reduced input-output ratio
Method used
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Embodiment 1
[0018] Embodiment 1: as figure 1 as shown,
[0019] The synchronous split mining reversing valve of the present invention includes an upper joint 1, a first adjusting cap 2, a pressure cap 3, a high-temperature disc spring 4, a first ceramic valve core 5, a first sand control channel 6, a main body 7, and a second sand control channel 8. The ceramic sealing valve seat 9, the second ceramic valve core 10, the high temperature spring 11, the high temperature seal 12, the second adjusting cap 13 and the adjusting rod 14 are composed. The upper joint 1 is a connecting piece with the oil production string, the upper and lower sides of the inner hole are tapered pipe threads, the upper end of the tapered pipe thread is connected with the oil production pipe string, and the lower end of the tapered pipe thread is connected with the upper end of the main body 7. , the outer diameter of the upper joint 1 is connected with the inner hole of the first adjusting cap 2 with threads; the i...
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The utility model relates to a reversing valve for synchronous separate production, which belongs to the technical field of downhole oil production equipment in the petroleum industry. By installing this device on the upper part of the non-injection-production dual-purpose pump, when steam is injected, the steam injection pressure is greater than the external pressure of the tool, the second ceramic valve core is opened, and the steam inlet circulation channel is opened to realize simultaneous separate extraction of steam through the oil pipe and the pump. The reversing valve is more pumped into the formation from the oil casing annulus; when heavy oil wells are braising and self-spraying (steam channeling) oil production, the pressure in the oil casing annulus is greater than the internal pressure of the tool, and the first ceramic valve core is opened at a constant pressure to start the liquid circulation Channel, self-spraying through the tubing. The device can realize the functions of steam injection and oil production reversing. Manufacture of synchronous split recovery reversing valve, which is used to connect to the position above the non-injection production pump of the oil production string. In the well, the synchronous separate production reversing valve plays the role of steam injection and oil production reversing.
Description
technical field [0001] The invention relates to a synchronous split production reversing valve, which belongs to the technical field of downhole oil production equipment in the petroleum industry. Background technique [0002] At present, the development of heavy oil mainly includes methods such as steam huff and puff, steam flooding and conventional hot water flooding. The steam huff and puff process is simple in construction, quick in effect, does not need special experimental research, and can be directly implemented in production wells, and it is widely welcomed by people. Especially in some reservoir conditions, such as thick oil layer, shallow buried oil layer, small well spacing, especially when gravity drainage capacity reaches economic production, steam huff and puff can obtain higher recovery factor. [0003] Steam huff and puff is a single well operation, and it is more applicable to various types of heavy oil reservoir geological conditions than steam flooding, ...
Claims
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IPC IPC(8): E21B34/06E21B43/24
Inventor 杨宇尧樊玉新张金钟王建国童玉宝刘建新鲜菊袁伟
Owner PETROCHINA CO LTD