CN105156054B - Loose and broken formation local reverse-circulation core bit - Google Patents

Loose and broken formation local reverse-circulation core bit Download PDF

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Publication number
CN105156054B
CN105156054B CN201510553078.0A CN201510553078A CN105156054B CN 105156054 B CN105156054 B CN 105156054B CN 201510553078 A CN201510553078 A CN 201510553078A CN 105156054 B CN105156054 B CN 105156054B
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CN
China
Prior art keywords
support
tube
transition
core
negative
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Expired - Fee Related
Application number
CN201510553078.0A
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Chinese (zh)
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CN105156054A (en
Inventor
陈宗涛
段隆臣
高元宏
刘鹏
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Qinghai Second Institute Of Geology And Mineral Resources
China University of Geosciences
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Qinghai Second Institute Of Geology And Mineral Resources
China University of Geosciences
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Application filed by Qinghai Second Institute Of Geology And Mineral Resources, China University of Geosciences filed Critical Qinghai Second Institute Of Geology And Mineral Resources
Priority to CN201510553078.0A priority Critical patent/CN105156054B/en
Publication of CN105156054A publication Critical patent/CN105156054A/en
Application granted granted Critical
Publication of CN105156054B publication Critical patent/CN105156054B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The invention provides a kind of loose and broken formation local reverse-circulation core bit, including joint, outer tube, it is negative to inhale element, transition element, core barrel head, transition UNICOM element, inner tube, reamer, bullet card and drill bit, the negative upper end for inhaling element and joint lower end, outer tube is connected, negative element lower end of inhaling connects transition element by support ring, transition element is connected by core pipe joint with inner tube, bullet is placed in inner tube, inner tube is seated on drill bit inwall step, inner tube is connected by reamer with drill bit, transition UNICOM element runs through support ring, transition element, core pipe joint is set.Drilling tool of the present invention causes negative pressure formation drilling fluid local reverse-circulation effect using the structure similar to gear pump, drilling fluid during avoiding complete opening reacting cycle is conducive to wash away hole wall, core is conducive to enter basket, core recovery can be effectively improved in drilling process, is used suitable for being crept into loose, broken, easy corrosion, easy erosion stratum.

Description

Loose and broken formation local reverse-circulation core bit
Technical field
The present invention relates to the engineering fields such as mineral resources, oil well probing, and in particular to a kind of complexity such as loose crushing Stratum local reverse-circulation core bit.
Background technology
At present, countries in the world mineral resources are increasingly exhausted, and this is accomplished by, and drilling company is more economical, be more effectively carried out mineral products Development of resources.It is to be understood that the structure of stratum Mineral Resource, situations such as moving towards, deep core drilling is maximally effective means.Make For the important tool in drilling operation --- drilling tool, its service behaviour directly influences the quality, cost and efficiency of drilling operation.
The bad grounds such as loose crushing are frequently encountered in drilling operation, its coring when meeting this kind of bad ground is bored and is stranded very much Difficulty, common coring drilling method is difficult to high-quality and high-efficiency and takes required core.The side that loose and broken formation creeps into coring is solved at present Fado is using complete opening reacting cycle or jetting type bottom hole local reverse-circulation drilling tool drilling coring.Complete opening reverse circulating drilling tool creep into when its Although drilling fluid loop is conducive to core to enter core barrel, but drilling fluid in the annular gap of outer tube and hole wall from the top down During motion, the reverse circulating drilling fluid meeting erosion hole wall of complete opening, core recovery is not high in loose and broken formation;Jetting type bottom hole Although local reverse-circulation drilling tool has common reverse circulating advantage, common reverse circulating defect can be also overcome, by penetrating The mode of stream causes the bottom hole local reverse-circulation to need to be pumped high effluxvelocity greatly and could be formed, and causes negative pressure appearance unobvious, In the case where effluxvelocity is relatively low, reacting cycle effect is poor, has had a strong impact on core recovery, causes core recovery low.
Currently, with the continuous improvement required mineral resources, reconnoitre stratum and become increasingly complex, reconnoitre depth also not Disconnected increase, coring requirement is also improved constantly.In coring drilling, loose crushing bad ground is inevitably run into, so that Cause that core recovery is high, core takes situations such as quality is relatively low.Therefore high-quality and high-efficiency takes required rock core, is mineral resources One of key link reconnoitred.
The content of the invention
The problem to be solved in the present invention is bored for existing complete opening reacting cycle or jetting type bottom hole local reverse-circulation drilling tool Enter coring above shortcomings there is provided a kind of bad ground coring with local inverse circulation drilling tool such as loose crushing, improve in pine The core recovery in broken bad ground is dissipated, realization is efficiently high-quality to take required core.
The solve the above problems technical scheme of use of the present invention is:
Loose and broken formation local reverse-circulation core bit, including joint, outer tube, negative suction element, transition element, rock core Under pipe joint, transition UNICOM element, inner tube (basket), reamer, bullet card and drill bit, the negative upper end and joint for inhaling element End, outer tube connection, bear and inhale element lower end by support ring connection transition element, transition element passes through core pipe joint and inner tube (basket) is connected, and bullet is placed in inner tube, and inner tube is seated on drill bit inwall step, inner tube (basket) by reamer with Drill bit is connected, and transition UNICOM element is set through support ring, transition element, core pipe joint.
By such scheme, the negative suction element inhales element support point, the gear of a pair of meshing, impeller, axle, bearing by negative Constitute, gear, impeller are fixedly connected by key with axle, axle is arranged on deep groove ball bearing;Negative element support point of inhaling includes Support, support gear side and support impeller side, support separate space with support gear side and support impeller side formation two respectively, Gear is arranged in the space that support is formed with support gear side, and impeller is arranged on support and the space of support impeller side formation In;The negative lower end for inhaling element support point is connected with support ring, and adjacent first nut in support ring lower end, the first nut and first stops The upper end connection of thrust bearing and transition element, the lower end of transition element is connect by the second thrust bearing, the second nut and core barrel Head connection, core pipe joint is connected through a screw thread with inner tube (basket).
By such scheme, a cylinder is formed after the support, support gear side and the combination of support impeller side, is arranged on In the cavity of joint lower end.
By such scheme, rack plate is provided between support and the joint lower end.
The operation principle of the present invention:Gear pump and two-tube independent reacting cycle operation principle are combined, by plain bore bottom Design addition is negative in local reverse-circulation drilling tool inhales element, and the negative element of inhaling is arranged in the space of joint lower end, is born and is inhaled on element Edge joint and the drilling fluid flowed out through waist hole on joint, lower end connects transition element, transition UNICOM element, through core pipe joint Connect inner tube (core barrel);Drilling fluid flows through joint waist hole from drilling rod, leads into the negative support impeller side for inhaling element, impacts leaf Impeller blade rotates impeller, and impeller drives a pair of engaged gears on opposite to rotate by axle.This rotation to meshing gear, with tooth The operation principle of wheel pump forms negative suction effect, so as to cause bottom hole local reverse-circulation.
The present invention reverse circulating drilling tool close with other, which is compared, to be had the advantages that:
1st, cause the mode of negative pressure formation drilling fluid local reverse-circulation different:Most of local reverse-circulation drilling tool is all to use Injecting type structure, using nozzle, holds spray apparatus and return connector etc., and suction is caused in inner tube to form drilling fluid bottom hole office Portion's reacting cycle effect, the present invention for simple drill in the bad grounds such as loose crushing can not coring or coring it is difficult and set Meter, negative pressure formation drilling fluid local reverse-circulation effect is caused using the structure similar to gear pump, relative to complete opening reacting cycle For, be conducive to avoiding drilling fluid from washing away hole wall;For direct circulation, part drilling fluid is along rock in the flow direction of bottom hole The direction that core enters basket is flowed, and is conducive to core to enter basket, is conducive to the raising of core recovery, its effect ratio is penetrated Streaming is good, is more beneficial for taking core;
2nd, suction element is born individually designed:Certain situation is pumped in drilling fluid pump amount, can be according to the loose crushing journey on stratum Degree, inhales effect by adjusting meshing gear whole depth, adjustment gear installation gap and adjustment impeller blade size to adjust to bear, bears Inhale effect strong and uniform, core can be made to be suspended in basket, core can be avoided to be rolled in basket, can be preferable Ensure the original structure of core, so as to be conducive to being directed to different degrees of loose and broken formation, high-effect high-quality takes core;
3rd, the reverse circulating drilling tool designed by the present invention is except possessing the excellent of reverse circulating drilling tool and bottom hole local reverse-circulation drilling tool Point is outer, additionally it is possible to overcome bottom hole local reverse-circulation drilling tool need big pump pressure, the shortcoming of high effluxvelocity and cause negative pressure not substantially, The low shortcoming of core recovery, improves the bad ground core recoveries such as loose crushing.
Brief description of the drawings
Fig. 1 is the vertical section structure schematic diagram of loose and broken formation local reverse-circulation core bit of the present invention;
In figure, 1- joints, 2- rack plates, 3- joints lower end, 4- gears, 5- deep groove ball bearings, 6- axles, 7- impellers, 8- Support gear side, 9- supports, 10- support impeller sides, 11- keys, 12- support rings, the nuts of 13- first, the thrust bearings of 14- first, Outside 15- transition UNICOM element, 16- transition elements, the thrust bearings of 17- second, the nuts of 18- second, 19- core pipe joints, 20- Pipe, 21- inner tubes (core barrel), 22- reamers, 23- bullet cards, 24- drill bits.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is further described.
Shown in reference picture 1, loose and broken formation of the present invention local reverse-circulation core bit, including it is joint 1, outer Pipe 20, it is negative inhale element, transition element 16, core barrel head 19, transition UNICOM element 15, inner tube (basket) 21, reamer 22, Bullet card 23 and drill bit 24, the negative upper end for inhaling element are connected with joint lower end 3, outer tube 20, are born suction element lower end and are passed through support Ring 12 connects transition element 16, and transition element 16 is connected by core pipe joint 19 with inner tube (basket) 21, and bullet card 23 is placed in In inner tube (basket) 21, inner tube (basket) 21 is seated on the inwall step of drill bit 24, and inner tube (basket) 21 passes through reaming Device 22 is connected with drill bit 24, and transition UNICOM element 15 is set through support ring 12, transition element 16, core pipe joint 19.
The negative suction element is made up of the negative element support point, the gear 4 of a pair of meshing, impeller 7, axle 6, bearing 5 of inhaling, tooth Wheel 4, impeller 7 are fixedly connected by key 11 with axle 6, and axle 6 is arranged on deep groove ball bearing 5;Negative element support point of inhaling includes Support 9, support gear side 8 and support impeller side 10, support 9 form two with support gear side 8 and support impeller side 10 respectively Space is separated, gear 4 is arranged in the space that support 9 is formed with support gear side 8, and impeller 7 is arranged on support 9 and support impeller In the space that side 10 is formed;The negative lower end for inhaling element support point is connected with support ring 12, adjacent first spiral shell in the lower end of support ring 12 Mother 13, the first nut 13 and the first thrust bearing 14 are connected with the upper end of transition element 16, and the lower end of transition element 16 passes through the Two thrust bearings, the second nut 18 are connected with core pipe joint 19, and core pipe joint 19 passes through screw thread with inner tube (basket) 21 Connection.
The support 9, support gear side 8 and support impeller side 10 form a cylinder after combining, under joint In the cavity at end 3.
Rack plate 2 is provided between the support 9 and joint lower end 3.
Local reverse-circulation core bit of the present invention is operated as follows during drilling loose and broken formation:
Enter the joint 1 being connected with drill string from the next drilling fluid of slush pump by the drill string of revolution, from leading for joint 1 Discharge orifice, through the hole on the hole on rack plate 2 and support 9, into the space being made up of support 9 and support impeller side 10, so The blade that drilling fluid can be impacted on the impeller 7 in the cavity afterwards, makes impeller 7 be rotated around axle 6, then drilling fluid is through support The guiding gutter of impeller side 10, flows into inner tube (core barrel) 21 and the annular gap of the formation of outer tube 20;The impeller 7 of rotation passes through key 11 Band moving axis 6 is rotated together, and the axle 6 of rotation is driven by key 11 to be arranged in the space that support 9 and support gear side 8 are formed A pair of engaged gears 4 rotates, the rotation of this pair of meshing gear 4, can constantly by transition element 16, transition UNICOM element 15, Fluid in core pipe joint 19, suction inner tube (core barrel) 21, makes to form negative pressure in inner tube (core barrel) 21, logical in drilling fluid Negative suction effect is caused when crossing drill bit.
The drilling fluid of the annular gap of inner tube (core barrel) 21 and the formation of outer tube 20 is flowed into, drill bit is reached through inside and outside ligament Place, while drilling fluid rinses drill bit, due to the suction function in inner tube (core barrel) 21, a part of drilling fluid will be along rock Core enters the direction of inner tube, into inner tube (core barrel) 21, so that in bottom hole formation local reverse-circulation effect;Another part is bored The drill bit mouth of a river of the well liquid through drill bit 24, outer tube 20 carry breakdown products with the annular gap of hole wall and carried it to earth's surface. Core will be filled with core barrel and carry drilled dry before brill and for a period of time, pass through the card coring of bullet card 23.
It should be understood that above-described embodiment is only illustrative of the invention and is not intended to limit the scope of the invention.In addition, it is to be understood that After the content of the invention lectured has been read, those skilled in the art can make various changes or modifications to the present invention, without Depart from the spirit and scope of technical solution of the present invention, it all should cover in scope of the presently claimed invention.

Claims (3)

1. loose and broken formation local reverse-circulation core bit, it is characterised in that:Including joint, outer tube, negative suction element, transition Element, core barrel head, transition UNICOM element, inner tube, reamer, bullet card and drill bit, the negative upper end for inhaling element and joint Lower end, outer tube connection, bear and inhale element lower end by support ring connection transition element, transition element passes through core pipe joint and inner tube Connection, bullet is placed in inner tube, and inner tube is seated on drill bit inwall step, and inner tube is connected by reamer with drill bit, transition connection Logical element is set through support ring, transition element, core pipe joint;
The negative suction element is made up of the negative element support point, the gear of a pair of meshing, impeller, axle, bearing of inhaling, gear, impeller It is fixedly connected by key with axle, axle is arranged on deep groove ball bearing;Negative element support point of inhaling includes support, support gear side With support impeller side, support separates space with support gear side and support impeller side formation two respectively, and gear is arranged on support In the space formed with support gear side, impeller is arranged in the space that support is formed with support impeller side;It is negative to inhale element support Partial lower end is connected with support ring, adjacent first nut in support ring lower end, the first nut and the first thrust bearing and transition member The upper end connection of part, the lower end of transition element is connected by the second thrust bearing, the second nut with core pipe joint, and core barrel connects Head is connected through a screw thread with inner tube.
2. loose and broken formation as claimed in claim 1 local reverse-circulation core bit, it is characterised in that:The support, A cylinder is formed after support gear side and the combination of support impeller side, in the cavity of joint lower end.
3. loose and broken formation as claimed in claim 1 local reverse-circulation core bit, it is characterised in that:The support with Joint is provided with rack plate between lower end.
CN201510553078.0A 2015-09-01 2015-09-01 Loose and broken formation local reverse-circulation core bit Expired - Fee Related CN105156054B (en)

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Application Number Priority Date Filing Date Title
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CN105156054B true CN105156054B (en) 2017-07-11

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105735928B (en) * 2016-03-04 2018-05-01 中国地质大学(武汉) Screw shaft formula local reverse-circulation core bit
CN107503698B (en) * 2017-09-19 2020-06-23 哈尔滨工业大学 Lunar soil drilling core taking mechanism with flow guide ring
CN114278303B (en) * 2022-03-03 2022-05-27 中国科学院地质与地球物理研究所 Planetary multifunctional coring bit, coring method and coring system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2477812Y (en) * 2001-04-03 2002-02-20 青海省核工业地质局 Jet-flow coring appts.
RU2318981C1 (en) * 2006-06-23 2008-03-10 Андрей Васильевич Секисов Core-taking tool
CN101435316A (en) * 2008-12-18 2009-05-20 中国石油集团长城钻探工程有限公司 Broken formation coring tool
CN201606022U (en) * 2009-12-25 2010-10-13 大庆石油管理局 Unconsolidated strata mechanical pressurizing-type closed coring tool
CN104632112A (en) * 2013-11-07 2015-05-20 大连市勘察测绘研究院有限公司 Through-type downhole hammer reverse circulation drilling structure
CN204476329U (en) * 2015-02-02 2015-07-15 陕西铁道工程勘察有限公司 A kind of basement rock triple pipe core bit

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Granted publication date: 20170711

Termination date: 20200901