发明名称 |
Tamp hole plug system and method |
摘要 |
Shallow boreholes, e.g. seismic shot holes are usually sealed with cement, gravel or more recently by pouring a water swellable material such as bentonite into the hole. A more effective method of sealing involves the insertion of an impermeable bottom plug into the hole, followed by a thick layer of a particulate material such as sodium bentonite which expands when in contact with water to seal the hole. A top plug can also be used with or without a cover of cuttings to promote lateral expansion of the sealant in the hole.
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申请公布号 |
US4736796(A) |
申请公布日期 |
1988.04.12 |
申请号 |
US19860880525 |
申请日期 |
1986.06.30 |
申请人 |
ARNALL, F. JAMES;GRAUL, ROBERT W.;SPENCE, ROBERT K. |
发明人 |
ARNALL, F. JAMES;GRAUL, ROBERT W.;SPENCE, ROBERT K. |
分类号 |
C09K8/516;E21B33/134;E21B33/138;F42D1/18;G01V1/104;(IPC1-7):E21B33/138 |
主分类号 |
C09K8/516 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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