APPLICATION OF DOUBLE CIRCULAR BIT IN TARIM REGION

Shi Lin; Liu yuejun; Yang Qihua; Shao Hairong

doi:10.3969/j.issn.1000-7393.1997.01.002

Shi Lin, Liu yuejun, Yang Qihua, Shao Hairong. APPLICATION OF DOUBLE CIRCULAR BIT IN TARIM REGION[J]. Oil Drilling & Production Technology, 1997, 19(1): 5-9. DOI: 10.3969/j.issn.1000-7393.1997.01.002

Citation:

Shi Lin, Liu yuejun, Yang Qihua, Shao Hairong. APPLICATION OF DOUBLE CIRCULAR BIT IN TARIM REGION[J]. Oil Drilling & Production Technology, 1997, 19(1): 5-9. DOI: 10.3969/j.issn.1000-7393.1997.01.002

Citation:

Shi Lin, Liu yuejun, Yang Qihua, Shao Hairong. APPLICATION OF DOUBLE CIRCULAR BIT IN TARIM REGION[J]. Oil Drilling & Production Technology, 1997, 19(1): 5-9. DOI: 10.3969/j.issn.1000-7393.1997.01.002

APPLICATION OF DOUBLE CIRCULAR BIT IN TARIM REGION

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There are very complicated underground geological conditions there in Tarim Basin and wells there are usually with great depth and lots of downhole troubles. Varlous rock salt layers are broadly distributed and exist even in deep intervals. Drilling with double circular bit can effectively reduce or eliminate creep of plastic formations and therefore prevent pipe sticking. Higher core recovery is assisted in coring operations when this kind of bit is used for hole enlargement. Prolonged drilling of completed wells can extent the annulus of the hole and enhance cementing quality. Application of double circular bit will open a prosperous future in Tarim Basin for drilling deep, extra-deep, slim wells and wells with downhole problems in the period of the 9th 5 year plan of national economy.

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