WO2016066177A3 - Dynamic underbalanced drilling technique - Google Patents

Dynamic underbalanced drilling technique Download PDF

Info

Publication number
WO2016066177A3
WO2016066177A3 PCT/EG2014/000032 EG2014000032W WO2016066177A3 WO 2016066177 A3 WO2016066177 A3 WO 2016066177A3 EG 2014000032 W EG2014000032 W EG 2014000032W WO 2016066177 A3 WO2016066177 A3 WO 2016066177A3
Authority
WO
WIPO (PCT)
Prior art keywords
bit
pressure
drilling
velocity
create
Prior art date
Application number
PCT/EG2014/000032
Other languages
French (fr)
Other versions
WO2016066177A2 (en
Inventor
Mohamed Hussien Mohamed EL-NEIRI
Original Assignee
El Neiri Mohamed Hussien Mohamed
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 El Neiri Mohamed Hussien Mohamed filed Critical El Neiri Mohamed Hussien Mohamed
Priority to US15/519,548 priority Critical patent/US20170254154A1/en
Priority to PCT/EG2014/000032 priority patent/WO2016066177A2/en
Publication of WO2016066177A2 publication Critical patent/WO2016066177A2/en
Publication of WO2016066177A3 publication Critical patent/WO2016066177A3/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • E21B10/61—Drill bits characterised by conduits or nozzles for drilling fluids characterised by the nozzle structure
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
    • E21B21/085—Underbalanced techniques, i.e. where borehole fluid pressure is below formation pressure
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • E21B4/08—Down-hole impacting means, e.g. hammers impact being obtained by gravity only, e.g. with lost-motion connection
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/02—Fluid rotary type drives
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/0078—Nozzles used in boreholes

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

This technique (Dynamic Underbalanced Drilling- DUBD) is based on basic physical and fluid mechanics laws to create an underbalanced zone below and around the bit. This technique utilizes the high velocities of drilling fluid coming out from nozzles of drill bits and the kinetic energy associated with this velocity to create this underbalanced zone. As kinetic energy increases at a fixed point the pressure will drop at this point. So we make some modifications to nozzle size and orientation and bit profile to keep this high velocity and prevent hitting the formation perpendicularly to prevent converting this kinetic energy back to pressure when the velocity becomes zero at the formation below the bit. We modify the nozzles to cause the mud flow parallel to the formation below the bit so create pressure drop in this area. This pressure drop will be restored when velocity drops. So as mud enters the annulus above the bit, mud slows down and pressure rises to its normal values. This technique will increase ROP and reduce formation damage. DUBD enables getting data about reservoir while drilling. These data include reservoir fluids, pressure and permeability. The reduction in drilling cost and time will be great.
PCT/EG2014/000032 2014-10-30 2014-10-30 Dynamic underbalanced drilling technique WO2016066177A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US15/519,548 US20170254154A1 (en) 2014-10-30 2014-10-30 Dynamic Underbalanced Drilling technique
PCT/EG2014/000032 WO2016066177A2 (en) 2014-10-30 2014-10-30 Dynamic underbalanced drilling technique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EG2014/000032 WO2016066177A2 (en) 2014-10-30 2014-10-30 Dynamic underbalanced drilling technique

Publications (2)

Publication Number Publication Date
WO2016066177A2 WO2016066177A2 (en) 2016-05-06
WO2016066177A3 true WO2016066177A3 (en) 2019-06-27

Family

ID=55858464

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EG2014/000032 WO2016066177A2 (en) 2014-10-30 2014-10-30 Dynamic underbalanced drilling technique

Country Status (2)

Country Link
US (1) US20170254154A1 (en)
WO (1) WO2016066177A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106599442B (en) * 2016-12-09 2019-10-29 中国石油天然气集团公司 Based on comprehensive logging parameters with bore reservoir properties identification and evaluation method and apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5355967A (en) * 1992-10-30 1994-10-18 Union Oil Company Of California Underbalance jet pump drilling method
US5775443A (en) * 1996-10-15 1998-07-07 Nozzle Technology, Inc. Jet pump drilling apparatus and method
US20040188145A1 (en) * 1999-02-25 2004-09-30 Weatherford/Lamb, Inc. Apparatus and methods for drilling
CN103089156A (en) * 2013-02-07 2013-05-08 杨立源 Composite drill bit with cutter blade provided with cutter disk cutting structure
US20140299311A1 (en) * 1998-11-20 2014-10-09 Effective Exploration, LLC System and Method for Accessing Subterranean Deposits

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5355967A (en) * 1992-10-30 1994-10-18 Union Oil Company Of California Underbalance jet pump drilling method
US5775443A (en) * 1996-10-15 1998-07-07 Nozzle Technology, Inc. Jet pump drilling apparatus and method
US20140299311A1 (en) * 1998-11-20 2014-10-09 Effective Exploration, LLC System and Method for Accessing Subterranean Deposits
US20040188145A1 (en) * 1999-02-25 2004-09-30 Weatherford/Lamb, Inc. Apparatus and methods for drilling
CN103089156A (en) * 2013-02-07 2013-05-08 杨立源 Composite drill bit with cutter blade provided with cutter disk cutting structure

Also Published As

Publication number Publication date
US20170254154A1 (en) 2017-09-07
WO2016066177A2 (en) 2016-05-06

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