CN201269049Y - Diamond composite sheet drilling bit used for core extraction in unconsolidated formation - Google Patents

Diamond composite sheet drilling bit used for core extraction in unconsolidated formation Download PDF

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Publication number
CN201269049Y
CN201269049Y CNU2008200608394U CN200820060839U CN201269049Y CN 201269049 Y CN201269049 Y CN 201269049Y CN U2008200608394 U CNU2008200608394 U CN U2008200608394U CN 200820060839 U CN200820060839 U CN 200820060839U CN 201269049 Y CN201269049 Y CN 201269049Y
Authority
CN
China
Prior art keywords
core
circle
bit
concentric
rock core
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.)
Expired - Lifetime
Application number
CNU2008200608394U
Other languages
Chinese (zh)
Inventor
张明利
于振忠
张敏
何樱子
闫双双
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.)
Shanghai Rongzhi Diamond Bit Co., Ltd.
Shanghai Zhongmeng Petroleum Natural Gas Co., Ltd.
Original Assignee
SHANGHAI ZHONGMAN DIAMOND BIT CO Ltd
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 SHANGHAI ZHONGMAN DIAMOND BIT CO Ltd filed Critical SHANGHAI ZHONGMAN DIAMOND BIT CO Ltd
Priority to CNU2008200608394U priority Critical patent/CN201269049Y/en
Application granted granted Critical
Publication of CN201269049Y publication Critical patent/CN201269049Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to a diamond compact bit used for coring at a unconsolidated stratum. A cuttings chute is arranged on the side wall of the outside circle of the bit, an inside flow passage is arranged on the inner side wall which is concentric with the outside circle, cutting teeth are arranged on the top surface between the cuttings chute and the inside flow passage, liquid spray holes which are distributed in a ring shape are arranged at one side of the cutting teeth of the top surface, and the circle center of each liquid spray hole is arranged on a concentric circle which is concentric with the outside circle. The utility model solves the problems of the prior diamond compact bit that when the bit carries out well drilling and coring on the unconsolidated stratum, a rock core is easy to flush by high pressure drilling liquid, thereby the diameter of the rock core becomes smaller or cuttings are dispersed not to form the core, the rock core which enters a rock core cylinder can also cause core leakage, and the yield rate of the rock core is influenced.

Description

A kind ofly be used for the diamond compact bit that unconsolidated formation is got core
Technical field
The utility model relates to a kind of diamond compact bit that unconsolidated formation is got core that is used for.
Background technology
The advantage that mechanical separator speed is fast because diamond compact (PDC) drill bit has, the life-span is long, drilling depth is many extensively is suitable in oil and gas well drilling.At present existing drilling geology is got the PDC drill bit of core, be applicable to general structure formation type and tight stratum drilling extracting core, and for unconsolidated formation drilling extracting cores such as mud shale, glutenite, coal petrographys, because in the drilling process, be subjected to the effect of circulation of drilling fluid pressure, core is easily washed away by high pressure drilling liquid, causes core diameter to diminish or breaks up landwaste and can not Cheng Xin, the core that enters the core tube also can cause leakage core, influences the core yield rate.
The utility model content
Technical problem to be solved in the utility model is: at the problem of above-mentioned existence, provide a kind of diamond compact bit that improves mechanical bit speed and unconsolidated formation core yield rate.
The utility model is achieved in that
A kind ofly be used for the diamond compact bit that unconsolidated formation is got core, the sidewall of drill bit cylindrical is provided with chip area, the inside wall concentric with described cylindrical is provided with inner flow passage, top surface is provided with cutting teeth between described chip area and the inner flow passage, cutting teeth one side at described top surface is provided with ring-shaped distributed spray hole, and the center of circle of described spray hole is positioned on the concentric concentric circles of described cylindrical.
The center of circle of described spray hole is on the line in the center of circle of described chip area and the described cylindrical center of circle.
Described spray hole is a bellmouth, and the aperture Φ of its surperficial aperture is 5~16mm.
The beneficial effects of the utility model:
According to the technical solution of the utility model, by ring-shaped distributed taper spray hole, both realized cooling bit cutting tooth and migration landwaste, and disperseed high pressure drilling liquid again the washing away of core, make loose cores such as mud shale, glutenite, coal petrography more complete enter the core tube; The PDC cutting teeth of minor diameter has good cutting performance to unconsolidated formation, can effectively improve mechanical bit speed; This drill bit and inner core cooperate raising unconsolidated formation core yield rate with open type coring tool or sealed coring instrument.
Below in conjunction with accompanying drawing the utility model is further described.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
According to Fig. 1, be used for the diamond compact bit that unconsolidated formation is got core in that the utility model is a kind of, taper spray hole 2 is distributed between chip area 5 and the inner flow passage 4, with the concentric annulus of drill bit cylindrical 2 on, the center of circle of taper spray hole 2 is positioned on the circle center line connecting of the center of circle of chip area 5 and drill bit cylindrical 2, the taper spray hole 2 that is positioned at cutting teeth 1 opening one side is up-small and down-big bellmouth, and its surperficial aperture Φ is 5~16mm.

Claims (3)

1, a kind ofly is used for the diamond compact bit that unconsolidated formation is got core, the sidewall of drill bit cylindrical is provided with chip area, the inside wall concentric with described cylindrical is provided with inner flow passage, top surface is provided with cutting teeth between described chip area and the inner flow passage, it is characterized in that: cutting teeth one side at described top surface is provided with ring-shaped distributed spray hole, and the center of circle of described spray hole is positioned on the concentric concentric circles of described cylindrical.
2, diamond compact bit according to claim 1 is characterized in that: the center of circle of described spray hole is on the line in the center of circle of described chip area and the described cylindrical center of circle.
3, diamond compact bit according to claim 1 and 2 is characterized in that: described spray hole is a bellmouth, and the aperture Φ of its surperficial aperture is 5~16mm.
CNU2008200608394U 2008-10-24 2008-10-24 Diamond composite sheet drilling bit used for core extraction in unconsolidated formation Expired - Lifetime CN201269049Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2008200608394U CN201269049Y (en) 2008-10-24 2008-10-24 Diamond composite sheet drilling bit used for core extraction in unconsolidated formation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2008200608394U CN201269049Y (en) 2008-10-24 2008-10-24 Diamond composite sheet drilling bit used for core extraction in unconsolidated formation

Publications (1)

Publication Number Publication Date
CN201269049Y true CN201269049Y (en) 2009-07-08

Family

ID=40841648

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2008200608394U Expired - Lifetime CN201269049Y (en) 2008-10-24 2008-10-24 Diamond composite sheet drilling bit used for core extraction in unconsolidated formation

Country Status (1)

Country Link
CN (1) CN201269049Y (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104024556A (en) * 2011-06-22 2014-09-03 史密斯国际公司 Fixed cutter drill bit with core fragmentation feature
CN104675330A (en) * 2013-11-27 2015-06-03 中国石油化工股份有限公司 Dry method coring bit
US9366090B2 (en) 2011-02-10 2016-06-14 Smith International, Inc. Kerfing hybrid drill bit and other downhole cutting tools

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10851594B2 (en) 2011-02-10 2020-12-01 Smith International, Inc. Kerfing hybrid drill bit and other downhole cutting tools
US9366090B2 (en) 2011-02-10 2016-06-14 Smith International, Inc. Kerfing hybrid drill bit and other downhole cutting tools
US9404312B2 (en) 2011-02-10 2016-08-02 Smith International, Inc Cutting structures for fixed cutter drill bit and other downhole cutting tools
US9347275B2 (en) 2011-06-22 2016-05-24 Smith International, Inc. Fixed cutter drill bit with core fragmentation feature
CN104024556B (en) * 2011-06-22 2016-06-29 史密斯国际公司 There is the fixing teeth drill bit of core breakage properties
CN104024556A (en) * 2011-06-22 2014-09-03 史密斯国际公司 Fixed cutter drill bit with core fragmentation feature
CN104675330A (en) * 2013-11-27 2015-06-03 中国石油化工股份有限公司 Dry method coring bit

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
TR01 Transfer of patent right

Effective date of registration: 20110809

Address after: 201204, No. 7, 58 Central Road, North Cai Town, Shanghai, Pudong New Area

Co-patentee after: Shanghai Zhongmeng Petroleum Natural Gas Co., Ltd.

Patentee after: Shanghai Zhongman Diamond Bit Co., Ltd.

Address before: 201204, No. 58, Central Road, North Cai Town, Shanghai, Pudong New Area

Patentee before: Shanghai Zhongman Diamond Bit Co., Ltd.

ASS Succession or assignment of patent right

Owner name: SHANGHAI ZHONGMENG PETROLEUM NATURAL GAS CO., LTD.

C41 Transfer of patent application or patent right or utility model
CP01 Change in the name or title of a patent holder

Address after: 201204, No. 7, 58 Central Road, North Cai Town, Shanghai, Pudong New Area

Patentee after: Shanghai Rongzhi Diamond Bit Co., Ltd.

Patentee after: Shanghai Zhongmeng Petroleum Natural Gas Co., Ltd.

Address before: 201204, No. 7, 58 Central Road, North Cai Town, Shanghai, Pudong New Area

Patentee before: Shanghai Zhongman Diamond Bit Co., Ltd.

Patentee before: Shanghai Zhongmeng Petroleum Natural Gas Co., Ltd.

C56 Change in the name or address of the patentee

Owner name: SHANGHAI RONGZHI DIAMOND BIT CO., LTD.

Free format text: FORMER NAME: SHANGHAI ZHONGMAN DIAMOND BIT CO., LTD.

CX01 Expiry of patent term

Granted publication date: 20090708

CX01 Expiry of patent term