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Appl. Sci. 2017, 7(1), 18; doi:10.3390/app7010018

Rheological Properties with Temperature Response Characteristics and a Mechanism of Solid-Free Polymer Drilling Fluid at Low Temperatures

1
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
2
School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
*
Author to whom correspondence should be addressed.
Academic Editor: Giorgio Biasiol
Received: 6 October 2016 / Revised: 19 December 2016 / Accepted: 20 December 2016 / Published: 23 December 2016
(This article belongs to the Section Materials)
View Full-Text   |   Download PDF [4883 KB, uploaded 23 December 2016]   |  

Abstract

The rheological properties of drilling fluid have important effects during drilling in natural gas hydrate at low temperatures. The present study was performed using theoretical analysis. Experiments and micro-analyses were carried out to determine the rheological properties with temperature response characteristics and the mechanism involved in solid-free polymer drilling fluid (SFPDF) at low temperatures when drilling in permafrost with natural gas hydrates (NGH). The curves of shear stress with the shear rates of three kinds of polymer drilling fluids, Semen Lepidii natural vegetable gum, polyacrylamide, and xanthan gum, were drawn. Then, statistical and related analyses of test data were performed using Matlab ver. 8.0. Through regression analysis, the Herschel–Bulkley model was used to characterize the rheological characteristics of SFPDF. On this basis, the laws regarding the rheological properties of the three kinds of SFPDF under changing temperatures were analyzed and rheological properties with temperature response state equations were established. Next, the findings of previous studies on rheological properties with temperature response characteristics of the SFPDF were reviewed. Finally, the rheological properties with temperature response mechanisms were assessed using scanning electron microscopy and infrared spectrum analysis. View Full-Text
Keywords: SFPDF; low temperature; Herschel–Bulkley model; rheological properties; response; microscopic characteristics SFPDF; low temperature; Herschel–Bulkley model; rheological properties; response; microscopic characteristics
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Wang, S.; Yuan, C.; Zhang, C.; Chen, L.; Liu, J. Rheological Properties with Temperature Response Characteristics and a Mechanism of Solid-Free Polymer Drilling Fluid at Low Temperatures. Appl. Sci. 2017, 7, 18.

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