Synchronous separate extraction reversing valve
A technology of reversing valve and oil production pipe, which is applied in the fields of fluid production, earth-moving drilling, valve device of wellbore/well, etc. The effect of reducing waste liquid discharge, reducing heat loss and reducing safety hazards
Active Publication Date: 2014-10-15
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 invention provides a synchronous separate extraction reversing valve, belonging to the technical field of underground oil extraction equipment of a petroleum industry. The device is arranged at the upper part of a non-injection extraction dual-purpose pump; when steam is injected, the steam injection pressure is greater than external pressure of a tool, and a second ceramic valve core is opened; a steam inlet circulating pipeline is opened to realize that the steam is injected into a stratum from an oil lantern ring space through an oil pipe and a synchronous separate extraction reversing valve overstep pump on the pump; the pressure of the oil lantern ring space is greater than the pressure in the tool when a heavy oil well is braised and is subjected to oil extraction at a flush stage (steam channeling); a first ceramic valve core is opened at fixed pressure and a liquid outlet circulating channel is opened; then oil is self-sprayed through the oil pipe. The device can realize the effects of steam injection and oil extraction reversing. The synchronous separate extraction reversing valve is manufactured and is used for the position above the non-injection extraction pump of an oil extraction pipe column; before the steam is injected, the oil extraction pipe column is descended to an underground normal oil extraction position; in a steam huff and puff process, the oil extraction pipe column is not moved and a well is not opened, and the synchronous separate extraction reversing valve realizes the effects of injecting the steam, and reversing during oil extraction.
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