Two-pipe thermal recovery wellhead device
A wellhead device and thermal recovery technology, which is applied in earthwork drilling, wellbore/well components, sealing/isolation, etc., can solve the problems of increasing costs and achieve the effect of reducing oil production costs
Inactive Publication Date: 2016-07-06
PETROCHINA CO LTD
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Problems solved by technology
[0004] The main purpose of the present invention is to provide a double-tube thermal recovery wellhead device to solve the problem that the wire transmission line in the prior art needs to be provided with an independent dedicated pipeline, which will increase the cost
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[0026] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0027] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0028] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that wh...
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The invention provides a two-pipe thermal recovery wellhead device. The two-pipe thermal recovery wellhead device comprises a two-pipe cross tee and a connection sleeving pipe, wherein first annular connection pieces are arranged at the bottom of the two-pipe cross tee and are provided with first inner holes, the connection sleeving pipe is located under the two-pipe cross tee, the top of the connection sleeving pipe is provided with a second annular connection piece matched with the first annular connection pieces, the second annular connection piece is provided with second inner holes, and the diameter of the first inner holes is smaller than that of the second inner holes. The two-pipe thermal recovery wellhead device further comprises detection holes formed in the first annular connection pieces, the upper end of each detection hole is located in the upper surface of the corresponding first annular connection piece, the lower end of each detection hole is located in the lower surface of the corresponding first annular connection piece, and the projection of the detection holes in an overlooking plane is located within the range of the projection of the second inner holes in the overlooking plane. According to the technical scheme, the problems that a wire transmission line needs to be provided with an independent special pipeline in the prior art, and accordingly the cost is increased are effectively solved.
Description
technical field [0001] The invention relates to the technical field of oilfield exploitation, in particular to a double-pipe thermal recovery wellhead device. Background technique [0002] In the process of oil well production, it is often necessary to monitor the downhole temperature, pressure, flow and other parameters in real time, so as to safely and effectively control the oil production process. [0003] In the prior art, the commonly used monitoring method is: placing the sensor downhole, and timely transmitting the sensing value to the host computer through the wire, so as to complete the real-time measurement of each parameter. In the above monitoring method, the transmission line of the wire usually needs to be provided with an independent dedicated pipeline. During oil well exploitation, the wellhead should be in a closed state. Therefore, it is also necessary to configure special sealing facilities for this special pipeline. The installation cost of special pi...
Claims
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Inventor 章敬窦升军纪拥军陈仙江江洪程豪谢寿昌徐明强张俊中聂洪力胡建平赵南万丙乾
Owner PETROCHINA CO LTD