CN208502674U - A kind of two-way injection core bit of reduction chip hold down effect - Google Patents

A kind of two-way injection core bit of reduction chip hold down effect Download PDF

Info

Publication number
CN208502674U
CN208502674U CN201821041096.6U CN201821041096U CN208502674U CN 208502674 U CN208502674 U CN 208502674U CN 201821041096 U CN201821041096 U CN 201821041096U CN 208502674 U CN208502674 U CN 208502674U
Authority
CN
China
Prior art keywords
core bit
cylinder
drilling fluid
core
injection
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.)
Active
Application number
CN201821041096.6U
Other languages
Chinese (zh)
Inventor
李鹏
霍爱莉
董晨晨
刘兴欣
郭海泉
孙磊
张亮
李舒
杨立文
孙文涛
罗军
庄纯才
张国丽
王子臣
石林
菅洪义
刘文程
张博文
周楠楠
张帆
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.)
China National Petroleum Corp
CNPC Great Wall Drilling Co
Original Assignee
CNPC Great Wall Drilling Co
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 CNPC Great Wall Drilling Co filed Critical CNPC Great Wall Drilling Co
Priority to CN201821041096.6U priority Critical patent/CN208502674U/en
Application granted granted Critical
Publication of CN208502674U publication Critical patent/CN208502674U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model relates to oil drilling CORING TECHNOLOGY field, in particular to a kind of two-way injection core bit of reduction chip hold down effect.The core bit ontology upper end of the device connects outer cylinder, core bit inner body wall connects inner cylinder and is sealed by sealing ring, annular space is connected with the lower injection hydrophthalmia of core bit body interior between outer cylinder and inner cylinder, lower injection hydrophthalmia lower end outlet is arranged in core bit ontology bottom end, drilling fluid upgoing flow passages are equipped with inside each wing, the import of drilling fluid upgoing flow passages is connected to lower injection hydrophthalmia, and drilling fluid upgoing flow passages exit is equipped with top nozzle.The utility model realizes the influence that can be effectively reduced chip hold down effect, improve coring drilling speed, shorten the coring construction time, reduce core erosion, improve core recovery, the large rock-carrying ability for guaranteeing drilling fluid in annular space simultaneously prevents landwaste and well wall dropping block from accumulating on core bit top, reduces the possibility that accident occurs.

Description

A kind of two-way injection core bit of reduction chip hold down effect
Technical field:
The utility model relates to oil drilling CORING TECHNOLOGY field, in particular to the two-way injection of a kind of reduction chip hold down effect takes Heart drill bit.
Background technique:
Rock core is most direct, the most complete record obtained in petroleum exploration and development process, passes through drilling and coring delivery work Tool, rock core can completely be taken out from underground to ground.Core bit is mounted on the lower part of coring tool, and there is a circle at middle part Hole, during core-drilling, core bit rotary cutting formation rock forms a core column and passes through the circular hole in the middle part of drill bit Into coring inner drum, rock core is maintained in coring inner drum by specifically cutting heart mode, pulls out of hole and completes coring operation.
The current well overwhelming majority for having coring to design all uses Overbalance Drilling, i.e. shaft bottom head of liquid is greater than ground lamination Power can not only enhance the hardness of bottom rock in the normal pressure that shaft bottom generates, can also landwaste be prevented to leave shaft bottom, lead to landwaste weight It is multiple broken, rate of penetration is reduced, this phenomenon is known as " chip hold down effect ".During drilling and coring delivery, due to worrying that rock core is drilled Well liquid erosion, therefore frequently with smaller displacement when normal drilling well (about 2/3rds), drilling well flow velocity becomes smaller in annular space, Large rock-carrying ability reduces, and landwaste and well wall dropping block are possible to be deposited on core bit and lead to the generation of down-hole accident.
Utility model content:
The technical problem to be solved by the present invention is to provide a kind of two-way injection core bit of reduction chip hold down effect, the dresses Setting realizes the influence that can be effectively reduced chip hold down effect, improves coring drilling speed, shortens the coring construction time, reduces rock core punching Erosion improves core recovery, while guaranteeing the large rock-carrying ability of drilling fluid in annular space, prevents landwaste and well wall dropping block in core bit Top accumulation reduces the possibility that accident occurs.Overcoming existing core bit is influenced big, rate of penetration drop by chip hold down effect Deficiency low, that rock core is easily accumulated by drilling fluid erosion, landwaste and well wall dropping block on core bit top.
Technical solution adopted in the utility model is: a kind of two-way injection core bit of reduction chip hold down effect, including takes Heart drill body, core bit body central are provided with central passage, and core bit body lower part is evenly equipped with multiple wings;Column drill Head ontology upper end connects outer cylinder, and core bit inner body wall connects inner cylinder and sealed by sealing ring, ring between outer cylinder and inner cylinder Sky is connected with the lower injection hydrophthalmia of core bit body interior, and lower injection hydrophthalmia lower end outlet is arranged at core bit ontology bottom End, each wing inside are equipped with drilling fluid upgoing flow passages, and the import of drilling fluid upgoing flow passages is connected to lower injection hydrophthalmia, on drilling fluid Top nozzle is installed, top nozzle is threaded on core bit body outer wall at row runner exit.
Top nozzle is made of cemented carbide material.
Drilling fluid upgoing flow passages are arranged obliquely and outward.
The beneficial effects of the utility model are: the utility model realizes the influence that can be effectively reduced chip hold down effect, Coring drilling speed is improved, the coring construction time is shortened, reduces core erosion, improves core recovery, while guaranteeing drilling well in annular space The large rock-carrying ability of liquid prevents landwaste and well wall dropping block from accumulating on core bit top, reduces the possibility that accident occurs.
Detailed description of the invention:
The utility model is described in more detail with reference to the accompanying drawings and detailed description.
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the schematic diagram that the utility model is connected with inner cylinder, outer cylinder.
Specific embodiment:
As shown in Figure 1 and Figure 2, a kind of two-way injection core bit of reduction chip hold down effect, including core bit ontology 1, coring 1 center of drill body is provided with central passage 6, and 1 lower part of core bit ontology is evenly equipped with multiple wings 4;1 upper end of core bit ontology Outer cylinder 7 is connected, 1 inner wall of core bit ontology connection inner cylinder 8 is simultaneously sealed by sealing ring 9, and ring between outer cylinder 7 and inner cylinder 8 is prevented Drilling fluid in sky enters central passage 6.Annular space and the lower injection hydrophthalmia inside core bit ontology 1 between outer cylinder 7 and inner cylinder 8 5 are connected, and lower 5 lower end of injection hydrophthalmia outlet setting is equipped on drilling fluid inside 1 bottom end of core bit ontology, each wing 4 Row runner 3,3 import of drilling fluid upgoing flow passages are connected to lower injection hydrophthalmia 5, and 3 exit of drilling fluid upgoing flow passages is equipped with spray Mouth 2, top nozzle 2 flow to contrary with lower injection hydrophthalmia 5, and top nozzle 2 is threaded on 1 outer wall of core bit ontology.
Top nozzle 2 is made of cemented carbide material.
Drilling fluid upgoing flow passages 3 are arranged obliquely and outward.
In core-drilling using discharge capacity equally big when typical well, it is ensured that drilling fluid takes rock energy in annular space Power prevents landwaste and well wall dropping block from accumulating on 1 top of core bit ontology, reduces the possibility that accident occurs.Due to top nozzle 2 In the presence of a part of drilling fluid does not contact and erosion shaft bottom, but reversed rear injection upwards, it is possible to reduce shaft bottom head of liquid, Shaft bottom forms local near-balance drilling or under balance pressure drilling, reduces or releases chip hold down effect, improve rate of penetration.Since shaft bottom is pressed Difference reduces, and formation rock axial compressive force reduces, and formation hardness decreases, and rate of penetration can also be made to improve.Pass through lower injection Hydrophthalmia 5 contacts the discharge capacity that the drilling fluid displacement in shaft bottom requires for core-drilling, reduces erosion of the drilling fluid to core column, improves rock Heart yield rate.
It is understood that being merely to illustrate the utility model above with respect to the specific descriptions of the utility model and not being It is limited to technical solution described in the utility model embodiment, those skilled in the art should understand that, it still can be with It modifies to the utility model or equivalent replacement, to reach identical technical effect;Needs are used as long as meeting, all in this reality Within novel protection scope.

Claims (3)

1. a kind of two-way injection core bit of reduction chip hold down effect, including core bit ontology (1), in core bit ontology (1) The heart is provided with central passage (6), and core bit ontology (1) lower part is evenly equipped with multiple wings (4);It is characterized by: core bit sheet Body (1) upper end connects outer cylinder (7), and core bit ontology (1) inner wall connects inner cylinder (8) and sealed by sealing ring (9), outer cylinder (7) the annular space lower injection hydrophthalmia (5) internal with core bit ontology (1) is connected between inner cylinder (8), lower injection hydrophthalmia (5) Outlet setting in lower end is equipped with drilling fluid upgoing flow passages (3) inside core bit ontology (1) bottom end, each wing (4), drilling fluid Upgoing flow passages (3) import is connected to lower injection hydrophthalmia (5), and drilling fluid upgoing flow passages (3) exit is equipped with top nozzle (2), on Nozzle (2) is threaded on core bit ontology (1) outer wall.
2. the two-way injection core bit of reduction chip hold down effect described in accordance with the claim 1, it is characterised in that: the top nozzle (2) it is made of cemented carbide material.
3. the two-way injection core bit of reduction chip hold down effect described in accordance with the claim 1, it is characterised in that: on the drilling fluid Row runner (3) is arranged obliquely and outward.
CN201821041096.6U 2018-07-03 2018-07-03 A kind of two-way injection core bit of reduction chip hold down effect Active CN208502674U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821041096.6U CN208502674U (en) 2018-07-03 2018-07-03 A kind of two-way injection core bit of reduction chip hold down effect

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821041096.6U CN208502674U (en) 2018-07-03 2018-07-03 A kind of two-way injection core bit of reduction chip hold down effect

Publications (1)

Publication Number Publication Date
CN208502674U true CN208502674U (en) 2019-02-15

Family

ID=65282198

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821041096.6U Active CN208502674U (en) 2018-07-03 2018-07-03 A kind of two-way injection core bit of reduction chip hold down effect

Country Status (1)

Country Link
CN (1) CN208502674U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110439470A (en) * 2019-08-20 2019-11-12 立府精密机械有限公司 A kind of PDC drill bit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110439470A (en) * 2019-08-20 2019-11-12 立府精密机械有限公司 A kind of PDC drill bit

Similar Documents

Publication Publication Date Title
CN108678671B (en) A kind of sea bed gas hydrate digging sleeve type injection recyclable device
CN100354498C (en) Air DTH hammer drilling equipment for core and follow-down drilling
CN105178859A (en) Full-well-section self-suction type reverse circulation gas drilling system for oil and gas drilling
CN109653691A (en) A kind of waterpower and mechanical composite controllable cutting bed cleanout tool
CN110005379A (en) A kind of voltage-controlled sleeve type spray head of gas hydrates layer jet crushing
CN108678679B (en) A kind of sea bed gas hydrate layer composite drill bit
CN208502674U (en) A kind of two-way injection core bit of reduction chip hold down effect
CN110029933A (en) Based on turbo-driven double speed PDC drill bit
CN105178897A (en) Gas drilling ground manifold connecting structure
CN110067516A (en) A kind of quick washing-, which is scraped, cuts combined type broken rock PDC drill bit
CN205036327U (en) Gas drilling ground manifold connection structure
CN205036295U (en) Full well section is from inhaling anti - recycle gas drilling system of formula
CN103556953A (en) Bottom hole negative-pressure upward-going spray nozzle PDC drill bit
CN109025830B (en) A kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit
CN2866785Y (en) Rotary valve type hydraulic percussion device
CN207160989U (en) A kind of pdc drill bits of high directionality
CN206280027U (en) Reacting cycle is forced to drag for sand instrument
CN204960850U (en) Coiled tubing bores to grind and uses flat junk mill
CN105317380B (en) A kind of variable-flow bores and rushes unitary nozzle
CN102657963A (en) Apparatus for reducing solid phase content of drilling fluid under well
CN201544128U (en) Hydraulic sand-blasting cutter
CN110318677A (en) Hot dry rock high energy hydraulic in-the-hole hammer sprays reaming hole device
CN207160990U (en) A kind of pdc drill bits with asymmetric wing
CN205314943U (en) Super deep water horizontal well prevent sinking bits tool. s
CN201913289U (en) Drill

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20200930

Address after: 100120 Beijing Xicheng District six laying Kang

Patentee after: CHINA NATIONAL PETROLEUM Corp.

Patentee after: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd.

Address before: 124010 Xinglongtai, Liaoning Province, oil street, No. 96, No.

Patentee before: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd.