CN202520228U - Integrated concentric overburden drilling tool - Google Patents

Integrated concentric overburden drilling tool Download PDF

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Publication number
CN202520228U
CN202520228U CN2012201797436U CN201220179743U CN202520228U CN 202520228 U CN202520228 U CN 202520228U CN 2012201797436 U CN2012201797436 U CN 2012201797436U CN 201220179743 U CN201220179743 U CN 201220179743U CN 202520228 U CN202520228 U CN 202520228U
Authority
CN
China
Prior art keywords
bit
drilling tool
annular bit
annular
integrated
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 - Fee Related
Application number
CN2012201797436U
Other languages
Chinese (zh)
Inventor
龚康强
孙超
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.)
YICHANG WOOKE SCIENCE AND TECHNOLOGY Co Ltd
Original Assignee
YICHANG WOOKE SCIENCE AND TECHNOLOGY 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 YICHANG WOOKE SCIENCE AND TECHNOLOGY Co Ltd filed Critical YICHANG WOOKE SCIENCE AND TECHNOLOGY Co Ltd
Priority to CN2012201797436U priority Critical patent/CN202520228U/en
Application granted granted Critical
Publication of CN202520228U publication Critical patent/CN202520228U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

An integrated concentric overburden drilling tool comprises a shoe, an annular bit and a guide bit, the shoe and the annular bit are of an integrated structure, a key is arranged on the inner side of the annular bit, a groove is arranged on the guide bit, and the annular bit and the guide bit are connected by the aid of the key and the groove. The integrated concentric overburden drilling tool has the advantages that since the shoe and the annular bit are of the integrated structure, the annular bit can be lifted from a hole along with a casing and can be used repeatedly, and construction cost is greatly reduced; effective drilling areas of the guide bit are increased, and working efficiency is improved; and the internal diameter of the annular bit is effectively increased, so that application range of the integrated concentric overburden drilling tool is widened.

Description

The integral type concentric simultaneous casing drilling tool
Technical field
The utility model relates to a kind of drilling tool, is specifically related to a kind of integral type concentric simultaneous casing drilling tool.
Background technology
Advance with eccentric to advance the same with pipe bit be to creep into a technical new drilling technology that grows up at down-the-hole with one heart, be characterized in and can in complicacies such as loose crushing and sandy gravel are difficult for the geology of pore-forming, successfully creep into pipe bit, and effective pore-forming.
In recent years, play anchor cable, beat in the engineering such as underground heat and bring into use to concentric simultaneous casing drilling tool, reason is that concentric simultaneous casing drilling tool compares with eccentric casing drilling tool, becomes hole perpendicularity better, simple to operate, and fault rate is low.Usefulness is a kind of split type concentric simultaneous casing drilling tool in the market, and its structure is as shown in Figure 1, mainly is made up of shoe a, annular bit b, starter c, and this split type casing drilling tool has following disadvantage:
1, the annular bit utilization that can not repeat, an annular bit can only bore a hole, has caused very big waste;
2, the internal orifice dimension of annular bit is less than normal, and the bit diameter that causes passing through is less than normal, has restricted the boundary of works area of engineering greatly; Usage range is little.
3, effective shock surface of starter is little, has reduced drilling efficiency.
Summary of the invention
The purpose of the utility model will provide a kind of annular bit reusable exactly, and the area that effectively creeps into of starter increases, high efficiency, the integral type concentric simultaneous casing drilling tool that cost is low.
The purpose of the utility model is achieved in that the integral type concentric simultaneous casing drilling tool; Comprise shoe, annular bit and starter; Shoe and annular bit are integrated; The annular bit inboard is provided with key, and starter is provided with groove, matches through key and groove between annular bit and the starter.End tooth adopts two toothrow structures before the annular bit.
The integral type concentric simultaneous casing drilling tool that the utility model provides has following beneficial effect: because shoe and annular bit are integrated, annular bit can be mentioned from the hole with sleeve pipe, and the use that can repeat, and greatly reduces construction cost; Annular bit with pre-structure be in China and foreign countries three toothrow structures; Be two toothrow structures now, increased the internal diameter of annular bit thereby external diameter is constant, therefore inserted of starter also increased; The area that effectively creeps into that is starter increases, and has improved operating efficiency; The annular bit internal diameter can effectively strengthen, and has strengthened its scope of application.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Fig. 1 is the concentric simultaneous casing drilling tool structural representation of prior art.
Fig. 2 is the structural representation of the utility model.
The specific embodiment
The structure of the utility model is as shown in Figure 2: a kind of integral type concentric simultaneous casing drilling tool; Comprise shoe 1, annular bit 3 and starter 2; Shoe 1 is integrated with annular bit 2, and annular bit 3 inboards are provided with key, and starter 2 is provided with groove; Through key and groove fit, starter 2 can drive annular bit 3 and rotate together between annular bit 3 and the starter 2.The other end of shoe 1 is provided with screw thread, directly links to each other with sleeve pipe during work.End tooth 4 adopts two toothrow structures before the annular bit 3.
The job step of the utility model is following:
1. when starting working, center bit drives annular bit 3 and creeps into downwards, also drives with pipe and shoe 1 simultaneously and follows up downwards.
2. arrive basement rock and advance, the counter-rotating drill bit is center bit proposed annular bit 3 and stay the hole from the hole at the bottom of.
3. marginal not slurry limit will be extracted at the bottom of the hole together with annular bit 3 with pipe.

Claims (2)

1. integral type concentric simultaneous casing drilling tool; Comprise shoe (1), annular bit (3) and starter (2); It is characterized in that: shoe (1) and annular bit (3) are integrated; Annular bit (3) inboard is provided with key, and starter (2) is provided with groove, matches through key and groove between annular bit (3) and the starter (2).
2. integral type concentric simultaneous casing drilling tool according to claim 1 is characterized in that: the preceding end tooth of annular bit (3) (4) adopts two toothrow structures.
CN2012201797436U 2012-04-25 2012-04-25 Integrated concentric overburden drilling tool Expired - Fee Related CN202520228U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012201797436U CN202520228U (en) 2012-04-25 2012-04-25 Integrated concentric overburden drilling tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012201797436U CN202520228U (en) 2012-04-25 2012-04-25 Integrated concentric overburden drilling tool

Publications (1)

Publication Number Publication Date
CN202520228U true CN202520228U (en) 2012-11-07

Family

ID=47103181

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012201797436U Expired - Fee Related CN202520228U (en) 2012-04-25 2012-04-25 Integrated concentric overburden drilling tool

Country Status (1)

Country Link
CN (1) CN202520228U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103114812A (en) * 2013-03-05 2013-05-22 山东托普森金刚石钻头有限公司 Diamond compact annular concentric simultaneous casing drilling bit and working method thereof
CN106014258A (en) * 2016-05-18 2016-10-12 中煤科工集团西安研究院有限公司 Coal mine underground concentric casing directional drilling device and construction method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103114812A (en) * 2013-03-05 2013-05-22 山东托普森金刚石钻头有限公司 Diamond compact annular concentric simultaneous casing drilling bit and working method thereof
CN106014258A (en) * 2016-05-18 2016-10-12 中煤科工集团西安研究院有限公司 Coal mine underground concentric casing directional drilling device and construction method thereof
CN106014258B (en) * 2016-05-18 2019-03-15 中煤科工集团西安研究院有限公司 Underground coal mine is with one heart with pipe directional drilling device and its construction method

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20121107

Termination date: 20160425