SU1304470A1 - Method for core drilling - Google Patents

Method for core drilling

Info

Publication number
SU1304470A1
SU1304470A1 SU3786112/03A SU3786112A SU1304470A1 SU 1304470 A1 SU1304470 A1 SU 1304470A1 SU 3786112/03 A SU3786112/03 A SU 3786112/03A SU 3786112 A SU3786112 A SU 3786112A SU 1304470 A1 SU1304470 A1 SU 1304470A1
Authority
SU
USSR - Soviet Union
Prior art keywords
drilling
hole
core
reaming
drill string
Prior art date
Application number
SU3786112/03A
Other languages
Russian (ru)
Inventor
Я.А. Гельфгат
М.Я. Гельфгат
Р.С. Аликин
Т.А. Андреева
Н.И. Андрианов
Original Assignee
Всесоюзный Научно-Исследовательский Институт Буровой Техники
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Всесоюзный Научно-Исследовательский Институт Буровой Техники filed Critical Всесоюзный Научно-Исследовательский Институт Буровой Техники
Priority to SU3786112/03A priority Critical patent/SU1304470A1/en
Application granted granted Critical
Publication of SU1304470A1 publication Critical patent/SU1304470A1/en

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Abstract

FIELD: mining. SUBSTANCE: if drill pipes are installed above downhole motor, assembly of inserted tool is added with device 5 for its fastening. After adding insert tool, it is lowered onto bottom hole, core drilling is proceeded of pilot hole, and further on, repeated are operations: pulling out, extraction of core, change of drilling head and making connections. Total deepening of pilot hole with core extraction is effected through length larger than even number of footage per bit during reaming. After drilling of pilot hole, the latter is reamed. For this purpose, run to bottom hole by means of drill string 4 is inserted reamer with downhole motor 3. It is installed in shoe 7 of drill string 6 and drilling is continued. As the main hole is deepened, drill string is added. After work with reamer is over, it is pulled out to the surface by means of mud reverse circulation or by rope. Reamer is replaced, and reaming operation is repeated. Reaming of pilot hole is carried out through its entire depth and only part of hole equalling its five diameters is left not reamed. Core is continued to be extracted with periodic reaming. After the last reaming, full-hole drilling is undertaken. So, periodic motions of drill string 6 prevent it from sticking for the period of core drilling. EFFECT: higher efficiency of drilling due to prevention of drill string sticking. 3 dwg
SU3786112/03A 1984-08-31 1984-08-31 Method for core drilling SU1304470A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU3786112/03A SU1304470A1 (en) 1984-08-31 1984-08-31 Method for core drilling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU3786112/03A SU1304470A1 (en) 1984-08-31 1984-08-31 Method for core drilling

Publications (1)

Publication Number Publication Date
SU1304470A1 true SU1304470A1 (en) 1995-01-20

Family

ID=60519098

Family Applications (1)

Application Number Title Priority Date Filing Date
SU3786112/03A SU1304470A1 (en) 1984-08-31 1984-08-31 Method for core drilling

Country Status (1)

Country Link
SU (1) SU1304470A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7195085B2 (en) 2000-06-28 2007-03-27 Weatherford/Lamb, Inc. Drill bit
US7650944B1 (en) 2003-07-11 2010-01-26 Weatherford/Lamb, Inc. Vessel for well intervention
USRE42877E1 (en) 2003-02-07 2011-11-01 Weatherford/Lamb, Inc. Methods and apparatus for wellbore construction and completion
WO2018133886A1 (en) * 2017-01-23 2018-07-26 珠海市英格尔特种钻探设备有限公司 Rope coring drill-based engineering geology drilling construction method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7195085B2 (en) 2000-06-28 2007-03-27 Weatherford/Lamb, Inc. Drill bit
USRE42877E1 (en) 2003-02-07 2011-11-01 Weatherford/Lamb, Inc. Methods and apparatus for wellbore construction and completion
US7650944B1 (en) 2003-07-11 2010-01-26 Weatherford/Lamb, Inc. Vessel for well intervention
WO2018133886A1 (en) * 2017-01-23 2018-07-26 珠海市英格尔特种钻探设备有限公司 Rope coring drill-based engineering geology drilling construction method

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