2016, 35(4) 1185-1194 DOI:     ISSN: 1004-5589 CN: 22-1111/P

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Keywords
production wells
drainage wells
casing pipe cutter
fisher
borehole cleaning
Authors
LV Shi-Dong
SUN You-Hong
LI Qiang
GUO Wei
ZHOU Ke
WANG Si-Yuan
PubMed
Article by Lv, S. D.
Article by Sun, Y. H.
Article by Li, Q.
Article by Guo, W.
Article by Zhou, K.
Article by Wang, S. Y.

Process design and application of dewatering wells remould to in-situ production wells

LV Shi-Dong, SUN You-Hong, LI Qiang, GUO Wei, ZHOU Ke, WANG Si-Yuan

College of Construction Engineering��Jilin University��Changchun 130026��China

Abstract��

In order to effectively expand the area and reduce the cost of the in-situ exploration of oil shales�� abandoned dewatering wells need to remoulded to in-situ production wells�� In consideration of the similarity of well structures between drainage wells and in-situ production wells��several designs and optimizations were employed to the remoulding methods of drainage wells located in the pilot experimental field for exploring Nong'an oil shale�� At the same time��an eccentric-type casing pipe cutter and a three-jaw casing pipe fisher were invented to lift casing pipes�� The practical engineering demonstrated that such a technique has several advantages including simple proce- dures��reasonable approach��high efficiency and low cost�� Both eccentric-type casing pipe cutter and three-jaw cas- ing pipe fisher have been used in remoulding drainage wells with desired effect��

Keywords�� production wells   drainage wells   casing pipe cutter   fisher   borehole cleaning  
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