Development and test of self-adjusting deflected wellhead sealing device for coalbed methane wells

Authors

PANG Tao, Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China

Abstract

In order to solve the problem of fluid and gas leakage in coal seam gas well, a self-adjusting deflected wellhead sealing device suitable for coal seam gas wells is developed. The device consists of three parts:Smooth rod sealing box, self-adjusting deflected part and lower sub. The self-adjusting deflected part is a smart combination of universal joint and high pressure flexible rubber tube, which makes the sealing box and the polished rod always keep good concentricity. Practical application shows that this kind of polished rod sealing device has reliable sealing performance, simple structure and the prospect of popularization and application.

Keywords

CBM well, wellhead sealing device, self-adjusting deflected, development and test

DOI

10.3969/j.issn.1001-1986.2019.05.017

Recommended Citation

P. (2019) "Development and test of self-adjusting deflected wellhead sealing device for coalbed methane wells," Coal Geology & Exploration: Vol. 47: Iss. 5, Article 18.
DOI: 10.3969/j.issn.1001-1986.2019.05.017
Available at: https://cge.researchcommons.org/journal/vol47/iss5/18

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