US20200362638A1 - A hybrid bit with roller cone having inserts - Google Patents

A hybrid bit with roller cone having inserts Download PDF

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Publication number
US20200362638A1
US20200362638A1 US16/764,288 US201816764288A US2020362638A1 US 20200362638 A1 US20200362638 A1 US 20200362638A1 US 201816764288 A US201816764288 A US 201816764288A US 2020362638 A1 US2020362638 A1 US 2020362638A1
Authority
US
United States
Prior art keywords
inserts
cone
cones
bit
roller
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US16/764,288
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English (en)
Inventor
Guanfu TU
Zongwen Liu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sinopec Oilfield Equipment Corp
Original Assignee
Kingdream PLC
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 Kingdream PLC filed Critical Kingdream PLC
Assigned to KINGDREAM PUBLIC LIMITED COMPANY reassignment KINGDREAM PUBLIC LIMITED COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LIU, ZONGWEN, TU, Guanfu
Publication of US20200362638A1 publication Critical patent/US20200362638A1/en
Abandoned legal-status Critical Current

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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
    • E21B10/08—Roller bits
    • E21B10/16—Roller bits characterised by tooth form or arrangement
    • 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
    • E21B10/08—Roller bits
    • E21B10/14—Roller bits combined with non-rolling cutters other than of leading-portion type
    • 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
    • E21B10/08—Roller bits
    • E21B10/18—Roller bits characterised by conduits or nozzles for drilling fluids
    • 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
    • E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
    • E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
    • 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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/50—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type
    • 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

Definitions

  • the present disclosure relates to a hybrid bit with roller cone having inserts in petroleum, natural gas and geological drilling, which is suitable for the penetration in stringer and hard formation.
  • a conventional polycrystalline diamond cutter (PDC) bit drills at bottom-hole through scraping when encountering hard formation during drilling, the main cutting elements are difficult to penetrate into rocks at bottom hole, so the rate-of-penetration (ROP) of a diamond bit becomes very slow, while a roller cone bit fractures rock through crushing, deeper broken pits are easy to be produced. Due to hard formation, volumetric fracture in rock cannot be produced, and hence the ROP of a roller cone bit is very slow. On the other hand, when encountering formation with staggered stringers from soft to hard, the cutting elements of a PDC bit tend to be broken by impact.
  • PDC polycrystalline diamond cutter
  • roller cone and PDC hybrid bit with relatively high comprehensive property is put forward to improve its ROP by making preliminary breakage to formation through cone cutters to release formation stress, and then scraping the formation through cutters in fixed blades, and meanwhile, the cutters in the fixed blades are protected well to prolong its service life, but the structure of available roller cone and diamond bit is not reasonable enough.
  • each row of cone inserts with the same cutting trajectory among the rows of available hybrid bit is located at the same cone, and the structure of cutter placement in each cone of available hybrid bit is different, as a result, each cone of a hybrid bit is unevenly stressed, a single cone gets failed due to premature failure of its bearing, which leads to the failure of a hybrid bit; on the other hand, when penetrating into hard formation, the wear resistance property of cone inserts is far lower than that of PDC cutters in a PDC bit.
  • the wear of cone inserts leads to the failure of hybrid bit, while in available hybrid bit, each row of cone inserts with the same cutting trajectory is located at the same cone, as a result, the space of a cone is partly wasted, and insert numbers are reduced.
  • the present disclosure provides a hybrid bit with roller cone having inserts
  • the hybrid bit with roller cone having inserts includes a bit body, a plurality of blades disposed on the bit body and a plurality of nozzles disposed on the bit body, the blade includes an inner cone, a nose, a shoulder and gage sections from inside to outside, a plurality of fixed cutting elements are mounted along the inner cone, the nose, the shoulder and the gage sections; a head is disposed between two adjacent blades with its upper end integrated with the bit body, and a roller cone disposed at its lower end, the roller cone is roller cone having inserts, and the cutting position of which corresponds to the nose and the shoulder sections of blades, several rows of cone inserts are arranged herein, with each row of cone inserts disposed at intervals along a round of cone weft, and closely arranged from inside to outside along the cutting profile envelope, with each adjacent row of cone inserts disposed at alternate intervals along cone meridian and the insert placement structure of each cone is the same.
  • a plurality of fixed cutting elements are laid out from inside to outside at the said blades, covering the whole bottom-hole, and forming profile envelopes of fixed cutting elements, and gyration radiuses of all the fixed cutting elements at each blade are different, that is, the structure of cutter placement at each blade is different.
  • an outermost profile envelope of the cone inserts and the profile envelope of the fixed cutting elements are in parallel and spaced at some intervals.
  • the interval between the outermost profile envelope of cone inserts herein and the outermost profile envelope of fixed cutting elements is from ⁇ 2.0 mm to 2.0 mm.
  • a center line of inserts overlaps with or approximates to a center line of each corresponding cutting elements of blades when each row of cone inserts is at the lowest point of cutting trajectory.
  • roller cones there are two to six blades, and there are two to six roller cones herein, and the roller cones are equal to or less than blade numbers.
  • the cone inserts comprise 6-20 rows of cone inserts; each row of cone inserts comprises 6-20 cone inserts.
  • the said cone inserts are cemented carbide inserts or mixed cutting elements with cemented carbide and polycrystalline diamond.
  • the said fixed cutting elements are diamond cutters.
  • the beneficial effects of the disclosure lie in: 1.
  • the cone insert arrangement of each roller cone is the same, the force distribution of the whole drill bit is balanced, which reduces premature failure of some bearings due to excessive force caused by uneven insert placement and improves the service life of the drilling bit.
  • Cone inserts are in alternate, weft and meridian arrangement, so that the inserts are not only distributed at cone surface evenly with rational insert placement, but also the cone space is saved more effectively, as a result, the density of insert placement is improved, ROP of the drilling bit is developed, rock fracture and wear resistance property of cones are improved, and hence the service life of the drilling bit is prolonged. 3.
  • the center line of inserts overlaps with or approximates to the center line of each corresponding fixed cutting elements in the blades, which leads to the rational share of cutting and the service life of drilling bit is improved.
  • FIG. 1 shows the stereo-structure schematic diagram of a hybrid bit with roller cone having inserts at the exemplary embodiment in this disclosure when the bit is placed upside down;
  • FIG. 2 shows the projection diagram on the outermost profile envelopes of cone inserts and fixed cutting elements of the hybrid bit with roller cone having inserts at the exemplary embodiment in this disclosure
  • FIG. 3 is the upward view of the hybrid bit with roller cone having inserts at the exemplary embodiment in this disclosure.
  • the embodiment provides a hybrid bit with roller cone having inserts includes a bit body 101 , three blades 102 disposed on the bit body and six nozzles 103 mounted on the bit body 101 .
  • the blade 102 includes the inner cone, nose, shoulder and gage sections from the center axis of the bit to the outside.
  • fixed cutting elements 104 which are PDC cutters, mounted at each section of the blades, the fixed cutting elements 104 at blades covering the whole bottom hole and forming the outermost profile envelope 110 of fixed cutting elements, with different gyration radius of each fixed cutting element at each blade, that is, different cutting trajectory.
  • No. 1 to No. 18 fixed cutting elements are distributed at three different blades 102 a , 102 b and 102 c.
  • a head 105 is disposed between each two adjacent blades, with its upper end welded to be integrated with the bit body, and a journal pin disposed at its lower end, a roller cone 106 mounted into the journal pin axially fixed with steel balls, roller cones and blades are in alternate arrangement.
  • cones are roller cones having inserts.
  • roller cones There are three roller cones named as A, B and C, having cone inserts 107 mounted, the cutting position of cone inserts herein corresponds to the nose and shoulder sections of a blade.
  • cone inserts There are eight rows of cone inserts, with each row of cone inserts disposed at intervals along a round of cone weft, and closely arranged from inside to outside along the outermost profile envelope of cutting elements, each adjacent row of cone inserts are in alternate, weft and meridian arrangement along the cone cutters with the same insert placement structure at each cone.
  • the outermost profile envelope 111 formed by cone inserts covers the nose and shoulder sections of the drilling bit beyond the outside of the outermost profile envelope 110 formed by fixed cutting elements of the said blades.
  • the distance H between the outermost profile envelope 111 of cone inserts and the outermost profile envelope 110 of fixed cutting elements is 1.0 mm.
  • the outermost inserts at the said cones cut rocks at wall of a wellbore along with the fixed cutting elements at the gage section of blades, the cutting trajectory of the said cone inserts overlaps with that of the said fixed cutting elements.
  • cutters for gage protection are disposed at the outer diameter of a head and blade flank.

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)
US16/764,288 2017-11-16 2018-10-30 A hybrid bit with roller cone having inserts Abandoned US20200362638A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201711138078.XA CN107747473B (zh) 2017-11-16 2017-11-16 一种镶齿牙轮混合钻头
CN201711138078.X 2017-11-16
PCT/CN2018/112519 WO2019095992A1 (zh) 2017-11-16 2018-10-30 一种镶齿牙轮混合钻头

Publications (1)

Publication Number Publication Date
US20200362638A1 true US20200362638A1 (en) 2020-11-19

Family

ID=61251166

Family Applications (1)

Application Number Title Priority Date Filing Date
US16/764,288 Abandoned US20200362638A1 (en) 2017-11-16 2018-10-30 A hybrid bit with roller cone having inserts

Country Status (4)

Country Link
US (1) US20200362638A1 (zh)
CN (1) CN107747473B (zh)
EA (1) EA202091073A1 (zh)
WO (1) WO2019095992A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107747473B (zh) * 2017-11-16 2024-04-16 中石化江钻石油机械有限公司 一种镶齿牙轮混合钻头
CN112554801A (zh) * 2019-09-26 2021-03-26 西南石油大学 一种带有刀翼加强结构的复合钻头
CN113107375B (zh) * 2021-04-27 2024-03-19 中石化江钻石油机械有限公司 一种高稳定性混合钻头

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8678111B2 (en) * 2007-11-16 2014-03-25 Baker Hughes Incorporated Hybrid drill bit and design method
US8047307B2 (en) * 2008-12-19 2011-11-01 Baker Hughes Incorporated Hybrid drill bit with secondary backup cutters positioned with high side rake angles
CN102747960A (zh) * 2012-07-11 2012-10-24 江汉石油钻头股份有限公司 一种混合钻头
CN202990860U (zh) * 2012-12-19 2013-06-12 江汉石油钻头股份有限公司 一种镶齿牙轮混合钻头
CN103015899B (zh) * 2012-12-19 2015-07-29 江汉石油钻头股份有限公司 一种强化心部切削功能的混合钻头
CN203669747U (zh) * 2013-11-01 2014-06-25 江汉石油钻头股份有限公司 一种镶齿牙轮混合钻头
US11428050B2 (en) * 2014-10-20 2022-08-30 Baker Hughes Holdings Llc Reverse circulation hybrid bit
CN105113995A (zh) * 2015-08-10 2015-12-02 宝鸡石油机械有限责任公司 一种强化心部破岩能力的复合钻头
US10012029B2 (en) * 2015-12-18 2018-07-03 Baker Hughes, A Ge Company, Llc Rolling cones with gage cutting elements, earth-boring tools carrying rolling cones with gage cutting elements and related methods
CN107747473B (zh) * 2017-11-16 2024-04-16 中石化江钻石油机械有限公司 一种镶齿牙轮混合钻头
CN207436922U (zh) * 2017-11-16 2018-06-01 中石化江钻石油机械有限公司 一种镶齿牙轮混合钻头

Also Published As

Publication number Publication date
CN107747473A (zh) 2018-03-02
WO2019095992A1 (zh) 2019-05-23
CN107747473B (zh) 2024-04-16
EA202091073A1 (ru) 2020-07-30

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