Title:
DRILL PIPE AND PILE DRIVER FOR CONSTRUCTION OF BELLED THREADED PILE, AND CONSTRUCTION METHOD OF BELLED THREADED PILE
Document Type and Number:
WIPO Patent Application WO/2016/095144
Kind Code:
A1
Abstract:
A drill pipe (20) for the construction of a belled threaded pile, pile driver (10) having the drill pipe (20), and construction method of the belled threaded pile; the drill pipe (20) comprises an inner pipe (102), an outer pipe (101), a bottom cover (103) and a plurality of drill tips (108); the outer pipe (101) is sleeved outside the inner pipe (102); the bottom cover (103) is detachably engaged with a lower end of the inner pipe (102); the plurality of drill tips (108) is pivotally mounted on the outer pipe (101) between a folded position and an unfolded position at the perimeter of the outer pipe (101); and when being at the folded position, the front one of two adjacent drill tips (108) has an overlapping joint with the rear one on the perimeter of the outer pipe (101). The drill pipe (20) has the functions of drilling a hole, protecting a wall and expanding a hole, and is suitable to form a hole in a complex and unstable soil layer.
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Inventors:
HE DEXIN (CN)
Application Number:
PCT/CN2014/094148
Publication Date:
June 23, 2016
Filing Date:
December 17, 2014
Export Citation:
Assignee:
HE DEXIN (CN)
International Classes:
E21B10/32; E02D5/34; E02D5/56; E21B17/08; E21B17/22
Foreign References:
| CN104563854A | 2015-04-29 | |||
| CN104563911A | 2015-04-29 | |||
| CN1904225A | 2007-01-31 | |||
| US20020070051A1 | 2002-06-13 | |||
| CN102619219A | 2012-08-01 | |||
| CN1800509A | 2006-07-12 | |||
| JP2004270440A | 2004-09-30 | |||
| JP2009002082A | 2009-01-08 |
Attorney, Agent or Firm:
TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)
北京清亦华知识产权代理事务所（普通合伙） (CN)
北京清亦华知识产权代理事务所（普通合伙） (CN)
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