CN110029933A - Based on turbo-driven double speed PDC drill bit - Google Patents

Based on turbo-driven double speed PDC drill bit Download PDF

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Publication number
CN110029933A
CN110029933A CN201910329285.6A CN201910329285A CN110029933A CN 110029933 A CN110029933 A CN 110029933A CN 201910329285 A CN201910329285 A CN 201910329285A CN 110029933 A CN110029933 A CN 110029933A
Authority
CN
China
Prior art keywords
drill bit
turbine
big
extension
locating piece
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.)
Pending
Application number
CN201910329285.6A
Other languages
Chinese (zh)
Inventor
田家林
胡志超
葛桐旭
宋豪林
邓喆
文峰
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.)
Southwest Petroleum University
Original Assignee
Southwest Petroleum University
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 Southwest Petroleum University filed Critical Southwest Petroleum University
Priority to CN201910329285.6A priority Critical patent/CN110029933A/en
Publication of CN110029933A publication Critical patent/CN110029933A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/46Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56Button-type inserts
    • E21B10/567Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/46Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56Button-type inserts
    • E21B10/567Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
    • E21B10/573Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts characterised by support details, e.g. the substrate construction or the interface between the substrate and the cutting element
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/62Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B4/00Drives for drilling, used in the borehole
    • E21B4/02Fluid rotary type drives

Abstract

The invention discloses one kind to be based on turbo-driven double speed PDC drill bit, including top connection, the upper and lower locating piece of turbine wheel shaft, large and small steel ball, turbo blade, the big drill bit of extension, turbine wheel shaft, flow guiding connector, y-shaped ring, the big bit nozzle of extension, the small drill bit in center;Assemble sequence is that turbine wheel shaft is first loaded onto turbo blade and flow guiding connector, forms global facility;Locating piece under the big bit nozzle of extension, y-shaped ring, the turbine equipped with small steel ball is packed into the big drill bit of extension, above-mentioned global facility is packed into the big drill bit of extension;By the small drill bit assembly in center on flow guiding connector;Finally successively load onto big steel ball, locating piece, top connection on turbine.The present invention drives the big drill bit inner turbine of extension by drilling fluid, and then drives the small drill bit in center, has the characteristics that the small drill bit in center is crept at different rates with the big drill bit of extension.

Description

Based on turbo-driven double speed PDC drill bit
Technical field
The invention belongs to oil and natural gas to exploit field, and in particular to one kind is based on turbo-driven double speed PDC drill bit Design.
Background technique
With deepening continuously for Oil And Gas Exploration And Development, deep-well, ultradeep well and Novel oil gas resource well are more and more, Bore a possibility that meeting " three high stratum " (formation hardness is high, rock drillability is high, rock abrasiveness is high) increasing, tradition For PDC drill bit during well drilling and rock crushing, low center portion efficiency of breaking rock is a key factor for restricting rate of penetration.Center portion broken rock effect The main reason for rate is low is that rock break-off process wellbore center portion cutting tooth movement velocity is low, causes drilling process drill bit center portion by rock "top" is lived, and rock practical broken form in wellbore center is to break disconnected, rather than the impact grinding of rock bit or PDC drill bit are cut Cut broken rock.This has seriously affected the rate of penetration and cost of exploration & development of deep hard formation.Rate of penetration and service life are weighing apparatuses Two important indicators of bit performance are measured, the critical issue that rate of penetration is always drilling engineering is improved.Guaranteeing certain use Under the premise of service life, improving rate of penetration reduces producing cost with weight for increasing drill bit total footage, reducing the number that makes a trip Want meaning.It is of the invention based on turbo-driven double speed PDC for the low problem of rate of penetration in the hard formation drilling process of deep Drill bit can first be crushed the rock at center using the small drill bit in turbine drives center, while fast using the drill string driving big drill bit of extension Speed drilling, it is effective to improve drillng operation efficiency.
Summary of the invention
In the drilling process mentioned the purpose of the present invention is to solve background technique, traditional PDC drill bit center portion is by rock "top" is lived, and the problem that rate of penetration is low is caused, and is proposed a kind of based on turbo-driven double speed PDC drill bit.
The technical scheme is that it is based on turbo-driven double speed PDC drill bit, and by top connection, locating piece on turbine wheel shaft, Big steel ball, turbo blade, the big drill bit of extension, turbine wheel shaft, small steel ball, locating piece under turbine wheel shaft, flow guiding connector, y-shaped ring, outside Prolong big bit nozzle, the small drill bit composition in center, it is characterized in that: assemble sequence is first to assemble turbo blade on turbine wheel shaft, Turbine wheel shaft lower end is connected through a screw thread flow guiding connector, forms global facility;The big bit nozzle of extension is loaded onto the big drill bit of extension, Y-shaped ring is loaded onto extension wammel head groove, locating piece under turbine is packed into the big drill bit of extension, the locating piece under turbine Groove is packed into small steel ball, and above-mentioned global facility is packed into the big drill bit of extension;It is connected through a screw thread in the other end of flow guiding connector The small drill bit in center;It is packed into big steel ball in turbine wheel shaft upper end, locating piece on turbine is reloaded into, is connected through a screw thread top connection, assemble It completes.
In above scheme based on turbo-driven double speed PDC drill bit, it is characterised in that: be provided on flow guiding connector it is circumferential Three inclined holes of cloth, drilling fluid enter flow guiding connector by inclined hole from the annular space between the big drill bit of extension and flow guiding connector, thus Into the small drill bit in center, when drilling, sprays from center bradawl head nozzle, and inclined hole advantageously reduces the pressure drop of drilling fluid.
In above scheme based on turbo-driven double speed PDC drill bit, it is characterised in that: locating piece and turbine wheel shaft under turbine It is upper fluted, small steel ball is packed between the two groove;When drilling, turbine wheel shaft drives the small bit broken rock in center, reduces turbine Lower frictional resistance between locating piece and turbine wheel shaft.
In above scheme based on turbo-driven double speed PDC drill bit, it is characterised in that: it is fixed on turbine wheel shaft upper end and turbine There is pit on the block of position, big steel ball is loaded between the two pit;When drilling, turbine wheel shaft drives the small bit broken rock in center, drop Frictional resistance on low turbine between locating piece and turbine wheel shaft.
In above scheme based on turbo-driven double speed PDC drill bit, it is characterised in that: the big drill bit of extension and flow guiding connector Between design there are two y-shaped ring, the opening directions of two y-shaped rings is on the contrary, above upward, below downward;It can It flows out or flows between the big drill bit of extension and flow guiding connector to avoid drilling fluid.
In above scheme based on turbo-driven double speed PDC drill bit, it is characterised in that: on turbine under locating piece, turbine Locating piece is provided with flow channels;Drilling fluid can push turbo blade by locating piece on turbine, and then drive turbine wheel shaft rotation; Later, drilling fluid can be by locating piece under turbine, and a part is ejected from the big bit nozzle of extension, and another part is by leading Stream connector enters the small drill bit in center, ejects from nozzle.
The beneficial effects of the present invention are: (1) this be based on turbo-driven double speed PDC drill bit structure it is compact to design rationally;(2) The function of the small drill bit in center and the big drill bit double speed drilling of extension may be implemented;(3) it can effectively improve rate of penetration, improve drilling well Operating efficiency.
Detailed description of the invention
Fig. 1 show that the present invention is based on the structural schematic diagrams of turbo-driven double speed PDC drill bit.
Fig. 2 show the assembled inside component diagram in Fig. 1 of the present invention.
Fig. 3 show the three-dimensional model diagram of Fig. 1 of the present invention.
Fig. 4 show locating piece three-dimensional figure under the turbine wheel shaft in Fig. 1 of the present invention.
Description of symbols: 1. top connections, locating piece on 2. turbine wheel shafts, 3. big steel balls, 4. turbo blades, 5. extension wammels Head, 6. turbine wheel shafts, 7. small steel balls, locating piece under 8. turbine wheel shafts, 9. flow guiding connectors, 10.Y shape sealing ring, the big drill bit spray of 11. extensions Mouth, the small drill bit in 12. centers.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
Shown in reference to the accompanying drawings, it is based on turbo-driven double speed PDC drill bit, by top connection (1), locating piece (2) on turbine, greatly Steel ball (3), turbo blade (4), the big drill bit of extension (5), turbine wheel shaft (6), small steel ball (7), locating piece (8) under turbine, water conservancy diversion connects Head (9), sealing ring (10), the big bit nozzle of extension (11), the small drill bit in center (12) composition, it is characterized in that: assemble sequence is first Turbo blade (4) is assemblied on turbine wheel shaft (6), is connected through a screw thread upper flow guiding connector (9) in turbine wheel shaft (6) lower end, is formed Global facility;Locating piece under turbine (8) are packed into the big drill bit of extension (5), locating piece (8) groove is packed into small steel under turbine Pearl (7), in extension wammel head (5), groove loads onto sealing ring (10), and above-mentioned global facility is packed into the big drill bit of extension (5);? Turbine wheel shaft (6) upper end is packed into big steel ball (3), is reloaded into locating piece on turbine (2), is connected through a screw thread top connection (1);To extension Big drill bit (5) loads onto the big bit nozzle of extension (11), and assembly is completed.
Based on the turbo-driven double speed PDC drill bit course of work: top connection (1) upper end connect drill string, drill string rotating it is same When driving the big drill bit of extension (5) rotate broken rock;Cleaner for high-pressure drilling fluid is squeezed into inside drill string, drilling fluid passes through based on turbo-driven The top connection (1) of double speed PDC drill bit flows through locating piece on turbine wheel shaft (2) and pushes turbo blade (4), and then drives turbine wheel shaft (6) Rotation;Since turbine wheel shaft (6) is connected with flow guiding connector (9), flow guiding connector (9) is connected with the small drill bit in center (12);Final turbine Axis (6) drives the small drill bit in center (12) to rotate broken rock;Drilling fluid continues to flow through locating piece under turbine (8), into the big drill bit of extension (5) annular space between flow guiding connector (9) is partially ejected from the big bit nozzle of extension (11), and another part passes through water conservancy diversion Connector (9) enters the small drill bit in center (12), ejects from nozzle, so that bottom-hole cleaning, is carried out landwaste out of pit shaft, into Row drillng operation.
It is provided with circumferential three uniformly distributed inclined holes on flow guiding connector (9) in above scheme, drilling fluid is from the big drill bit of extension (5) With the annular space between flow guiding connector (9), flow guiding connector (9) are entered by inclined hole, hence into the small drill bit in center (12), when drilling It is sprayed from nozzle, inclined hole advantageously reduces the pressure drop of drilling fluid.
It is fluted on locating piece (8) and turbine wheel shaft (6) under turbine in above scheme, small steel ball is packed between the two groove (7);When drilling, turbine wheel shaft (6) drives the small drill bit in center (12) to rotate broken rock, reduces locating piece (8) and turbine wheel shaft (6) under turbine Between frictional resistance.There is pit on locating piece (2) on turbine wheel shaft (6) upper end and turbine, big steel is loaded between the two pit Pearl (3);When drilling, turbine wheel shaft (6) drives the small drill bit in center (12) to rotate broken rock, reduces locating piece (2) and turbine wheel shaft on turbine (6) frictional resistance between.
Based on turbo-driven double speed PDC drill bit, there are two Y for design between the big drill bit of extension (5) and flow guiding connector (9) Shape sealing ring (10), the opening directions of two y-shaped rings (10) is on the contrary, above upward, below downward;It can be to avoid brill Well liquid is flowed out or is flowed between the big drill bit of extension (5) and flow guiding connector (9).
Based on turbo-driven double speed PDC drill bit, locating piece (8) was provided with circulation under locating piece (2), turbine on turbine Road;Drilling fluid can push turbo blade (4) by locating piece on turbine (2), and then drive turbine wheel shaft (6) rotation;Later, it bores Well liquid can be by locating piece under turbine (8), and a part is ejected from the big bit nozzle of extension (11), and another part is by leading It flows connector (9) and enters the small drill bit in center (12).
In above scheme based on turbo-driven double speed PDC drill bit, assemble sequence are as follows: first by turbo blade 4 assembly exist On turbine wheel shaft 6, it is connected through a screw thread upper flow guiding connector 9 in 6 lower end of turbine wheel shaft, forms global facility;Locating piece 8 under turbine is filled Enter in the big drill bit 5 of extension, 8 groove of locating piece is packed into small steel ball 7 under turbine, loads onto sealing in 5 groove of extension wammel head Above-mentioned global facility is packed into the big drill bit 5 of extension by circle 10;It is packed into big steel ball 3 in 6 upper end of turbine wheel shaft, is reloaded on turbine and positions Block 2 is connected through a screw thread top connection 1;The big bit nozzle 11 of extension is loaded onto the big drill bit 5 of extension, assembly is completed.

Claims (6)

1. it is based on turbo-driven double speed PDC drill bit, by top connection (1), locating piece (2) on turbine wheel shaft, big steel ball (3), turbine Blade (4), the big drill bit of extension (5), turbine wheel shaft (6), small steel ball (7), locating piece (8) under turbine wheel shaft, flow guiding connector (9), Y shape is close Seal (10), the big bit nozzle of extension (11), the small drill bit in center (12) composition, it is characterized in that: assemble sequence is first by turbine leaf Piece (4) is assemblied on turbine wheel shaft (6), is connected through a screw thread upper flow guiding connector (9) in turbine wheel shaft (6) lower end, and global facility is formed; The big bit nozzle of extension (11) is loaded onto the big drill bit of extension (5), in extension wammel head (5), groove loads onto y-shaped ring (10), Locating piece under turbine (8) are packed into the big drill bit of extension (5), locating piece (8) groove is packed into small steel ball (7) under turbine, will Above-mentioned global facility is packed into the big drill bit of extension (5);The small drill bit in center is connected through a screw thread in the other end of flow guiding connector (9) (12);It is packed into big steel ball (3) in turbine wheel shaft (6) upper end, locating piece on turbine (2) is reloaded into, is connected through a screw thread top connection (1), assembly is completed.
2. according to claim 1 be based on turbo-driven double speed PDC drill bit, it is characterised in that: flow guiding connector is opened on (9) Have circumferential three uniformly distributed inclined holes, annular space of the drilling fluid between the big drill bit of extension (5) and flow guiding connector (9), by inclined hole into Enter flow guiding connector (9), hence into the small drill bit in center (12), when drilling sprays from center bradawl head (12) nozzle, and inclined hole is advantageous In the pressure drop for reducing drilling fluid.
3. according to claim 1 be based on turbo-driven double speed PDC drill bit, it is characterised in that: locating piece (8) under turbine With it is fluted on turbine wheel shaft (6), small steel ball (7) are packed between the two groove;When drilling, turbine wheel shaft (6) drives the small drill bit in center (12) broken rock is rotated, the frictional resistance under turbine between locating piece (8) and turbine wheel shaft (6) is reduced.
4. it is according to claim 1 be based on turbo-driven double speed PDC drill bit, it is characterised in that: turbine wheel shaft (6) upper end with There is pit on locating piece (2) on turbine, big steel ball (3) are loaded between the two pit;When drilling, turbine wheel shaft (6) drives center Small drill bit (12) rotates broken rock, reduces the frictional resistance on turbine between locating piece (2) and turbine wheel shaft (6).
5. it is according to claim 1 be based on turbo-driven double speed PDC drill bit, it is characterised in that: the big drill bit of extension (5) with Design is there are two y-shaped ring (10) between flow guiding connector (9), and the opening directions of two y-shaped rings (10) is on the contrary, above Upward, below downward;It can flow out or flow between the big drill bit of extension (5) and flow guiding connector (9) to avoid drilling fluid It goes.
6. according to claim 1 be based on turbo-driven double speed PDC drill bit, it is characterised in that: locating piece on turbine (2), locating piece (8) is provided with flow channels under turbine;Drilling fluid can push turbo blade (4) by locating piece on turbine (2), And then drive turbine wheel shaft (6) rotation;Later, drilling fluid can be by locating piece under turbine (8), and a part is sprayed from the big drill bit of extension Mouth (11) ejects, and another part enters the small drill bit in center (12) by flow guiding connector (9), ejects from nozzle.
CN201910329285.6A 2019-04-23 2019-04-23 Based on turbo-driven double speed PDC drill bit Pending CN110029933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910329285.6A CN110029933A (en) 2019-04-23 2019-04-23 Based on turbo-driven double speed PDC drill bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910329285.6A CN110029933A (en) 2019-04-23 2019-04-23 Based on turbo-driven double speed PDC drill bit

Publications (1)

Publication Number Publication Date
CN110029933A true CN110029933A (en) 2019-07-19

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Country Status (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113006685A (en) * 2021-03-17 2021-06-22 西南石油大学 Gas drilling wall building device
CN113338808A (en) * 2021-07-13 2021-09-03 中国石油大学(北京) Main power rotary cutting wheel drill bit
CN111021946B (en) * 2019-12-31 2022-03-18 中国石油集团川庆钻探工程有限公司 Well drilling speed-increasing process for changing bottom hole confining pressure distribution by middle energy accumulation

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102561951A (en) * 2012-01-14 2012-07-11 中国石油天然气集团公司 Double-stage and double-speed well drilling tool
CN105221068A (en) * 2015-11-10 2016-01-06 西南石油大学 Percussion is utilized to improve the New Type of PDC Bit of heart portion efficiency of breaking rock
CN105421996A (en) * 2015-11-23 2016-03-23 西南石油大学 Drilling tool for breaking rocks by producing compound action through rotary-percussion mode
CN105804658A (en) * 2016-04-27 2016-07-27 山东国岳金刚石制品有限公司 Impact breaking type PDC bit
CN206000453U (en) * 2016-09-08 2017-03-08 中国石油天然气集团公司 A kind of twin-stage double-speed well drilling tool
CN107386960A (en) * 2017-08-04 2017-11-24 四川深远石油钻井工具股份有限公司 A kind of drilling speed device with composite drill bit
CN108278078A (en) * 2018-02-05 2018-07-13 中国石油大学(北京) Ultrasonic wave high-frequency percussion drilling rig

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102561951A (en) * 2012-01-14 2012-07-11 中国石油天然气集团公司 Double-stage and double-speed well drilling tool
CN105221068A (en) * 2015-11-10 2016-01-06 西南石油大学 Percussion is utilized to improve the New Type of PDC Bit of heart portion efficiency of breaking rock
CN105421996A (en) * 2015-11-23 2016-03-23 西南石油大学 Drilling tool for breaking rocks by producing compound action through rotary-percussion mode
CN105804658A (en) * 2016-04-27 2016-07-27 山东国岳金刚石制品有限公司 Impact breaking type PDC bit
CN206000453U (en) * 2016-09-08 2017-03-08 中国石油天然气集团公司 A kind of twin-stage double-speed well drilling tool
CN107386960A (en) * 2017-08-04 2017-11-24 四川深远石油钻井工具股份有限公司 A kind of drilling speed device with composite drill bit
CN108278078A (en) * 2018-02-05 2018-07-13 中国石油大学(北京) Ultrasonic wave high-frequency percussion drilling rig

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
陆望龙: "《实用塑料机械液压传动故障排除》", 30 September 2002 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111021946B (en) * 2019-12-31 2022-03-18 中国石油集团川庆钻探工程有限公司 Well drilling speed-increasing process for changing bottom hole confining pressure distribution by middle energy accumulation
CN113006685A (en) * 2021-03-17 2021-06-22 西南石油大学 Gas drilling wall building device
CN113338808A (en) * 2021-07-13 2021-09-03 中国石油大学(北京) Main power rotary cutting wheel drill bit

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Application publication date: 20190719

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