PARTICULARITY OF COAL COLLAPSE AND DRILLING FLUID COUNTERMEASURE

doi:10.3863/j.issn.1000-2634.2002.06.009

西南石油大学学报(自然科学版) ›› 2002, Vol. 24 ›› Issue (6): 28- 31.DOI: 10.3863/j.issn.1000-2634.2002.06.009

• 石油工程 • Previous Articles Next Articles

PARTICULARITY OF COAL COLLAPSE AND DRILLING FLUID COUNTERMEASURE

LIANG Da-chuan PU Xiao-lin XU Xing-hua

Southwest Petroleum Institute , Nanchong Sichuan 637001 , China

Received:2002-02-06 Revised:1900-01-01 Online:2002-12-20 Published:2002-12-20
Contact: LIANG Da chuan

Abstract

Abstract: In coal gas drilling , coal collapse led to drilling hard trip and other accidents. By mechanics test and structure feature discussion , the particularity of coalhole caving was analyzed and their effects factors , then , determine drilling fluid technology , optimize drilling fluid system and composition. Test show the optimized polymer drilling fluid can prevent coalhole instability
effective.

Key words: coal, collapse, borehole stability, drilling fluid

CLC Number:

TE254

LIANG Da-chuan PU Xiao-lin XU Xing-hua. PARTICULARITY OF COAL COLLAPSE AND DRILLING FLUID COUNTERMEASURE[J]. 西南石油大学学报(自然科学版), 2002, 24(6): 28- 31.

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PARTICULARITY OF COAL COLLAPSE AND DRILLING FLUID COUNTERMEASURE

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