CN201810217U - Polycrystalline diamond compact (PDC) drill bit - Google Patents
Polycrystalline diamond compact (PDC) drill bit Download PDFInfo
- Publication number
- CN201810217U CN201810217U CN2010205801569U CN201020580156U CN201810217U CN 201810217 U CN201810217 U CN 201810217U CN 2010205801569 U CN2010205801569 U CN 2010205801569U CN 201020580156 U CN201020580156 U CN 201020580156U CN 201810217 U CN201810217 U CN 201810217U
- Authority
- CN
- China
- Prior art keywords
- drill bit
- diamond
- polycrystalline diamond
- blades
- pdc
- 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
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to a PDC drill bit. Blades are distributed on the body of the drill bit, a circulating liquid spray hole is formed in the middle of each blade, a plurality of polycrystalline diamond column cutter blades are embedded in the positioning grooves of the blades, and the negative rake angle alpha between the front ends of the polycrystalline diamond column cutter blades and the central line of the body of the drill bit is 70 to 85 DEG C and increases gradually front the inside to the outside. The utility model has the advantages that: the processing and manufacturing are performed at normal pressure; the working height of diamond is big; many embedded layers are adopted; the area of the diamond lower lip of the drill bit is small; the mechanical properties of the drill bit are excellent; the mechanical drilling speed is constant and the drill bit is in a multi-step and negative-rake-angle shape; in operation, the drill bit has more free faces; and the effective cracking by the diamond under the tensile stress of rocks improves the mechanical drilling speed, and thus, the drilling efficiency is improved.
Description
Technical field
The utility model is that a kind of petroleum geology is explored and coal field development is crept into or coring tool, particularly a kind of composite polycrystal-diamond PDC drill bit.
Background technology
The angle of traditional PD C drill bit and rock bit scraper blade blade and center line of bit mostly is the right angle, thereby causes in the work drilling depth few, and wearing and tearing are many, and drilling efficiency is low, needs frequently more bit change, makes troubles to drillng operation.
Summary of the invention
It is a kind of simple in structure that the purpose of utility model, the utility model provide, and cost is low, and can prolong the composite polycrystal-diamond PDC drill bit of bit life.
The utility model is achieved in that the wing that distributes on the drill body, the circulation fluid spray orifice is arranged in the middle of the wing, stud with several polycrystalline diamond post cutter scraping blades in the locating slot of wing, the center line negative rake α of polycrystalline diamond post cutter scraping blade front end and drill body is 70-85 °, increases gradually from inside to outside.
Advantage of the present utility model is, have normal temperature processing and manufacturing, diamond working depth thick, inlay that the number of plies is many, long-pending little, the good mechanical property of labial surface at the bottom of the drill bit diamond, rate of penetration are constant, drill-shape is many steps negative rake, more scope of freedoms are arranged during operation, help the effective fragmentation of diamond under the rock tensile stress and improve rate of penetration, promote drilling efficiency.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of wing and polycrystalline diamond post cutter scraping blade;
The specific embodiment
Describe in detail below in conjunction with accompanying drawing: as shown in the figure, distribution wing 2 on the drill body 1, circulation fluid spray orifice 4 is arranged in the middle of the wing 2, stud with several polycrystalline diamond post cutter scraping blades 3 in the locating slot of wing 2, the center line negative rake α of polycrystalline diamond post cutter scraping blade front end and drill body is 70-85 °, increases gradually from inside to outside.
Claims (1)
1. composite polycrystal-diamond PDC drill bit, it is characterized in that, wing distributes on the drill body, the circulation fluid spray orifice is arranged in the middle of the wing, stud with several polycrystalline diamond post cutter scraping blades in the locating slot of wing, the center line negative rake α of polycrystalline diamond post cutter scraping blade front end and drill body is 70-85 °, increases gradually from inside to outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205801569U CN201810217U (en) | 2010-10-21 | 2010-10-21 | Polycrystalline diamond compact (PDC) drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205801569U CN201810217U (en) | 2010-10-21 | 2010-10-21 | Polycrystalline diamond compact (PDC) drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201810217U true CN201810217U (en) | 2011-04-27 |
Family
ID=43893160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205801569U Expired - Fee Related CN201810217U (en) | 2010-10-21 | 2010-10-21 | Polycrystalline diamond compact (PDC) drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201810217U (en) |
-
2010
- 2010-10-21 CN CN2010205801569U patent/CN201810217U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2615560C2 (en) | Drill bit with modular cutters and controlled drilling specific pressure | |
| US8839888B2 (en) | Tracking shearing cutters on a fixed bladed drill bit with pointed cutting elements | |
| CN204082017U (en) | The long gauge negative pressure antiimpact PDC drill bit of a kind of ultradeep well | |
| CN206016680U (en) | A kind of streamlined wing fast drilling drill bit of split | |
| CN206000471U (en) | A kind of preventing sticking PDC drill bit | |
| SE0901268A1 (en) | Carbide pins for a drill bit for striking rock drilling, drill bit and method of grinding a cemented carbide pin | |
| CN203097722U (en) | Tapered gauge PDC drill bit | |
| CN203701989U (en) | Spiral cutter blade steel body PDC drill bit | |
| CN203448721U (en) | Cutter with spiral holes | |
| CN201412068Y (en) | PDC drill bit suitable for small-hole directional well | |
| CN204627420U (en) | Gauge PDC drill bit is strengthened for plasticity mud shale three wing | |
| CN204024482U (en) | A kind of combined type PDC drill bit | |
| CN203403824U (en) | PDC bit | |
| CN203114180U (en) | Micro coring bit | |
| CN201810217U (en) | Polycrystalline diamond compact (PDC) drill bit | |
| CN203701983U (en) | Steel body spiral four blade PDC (Polycrystalline Diamond Compact) bit | |
| CN202493221U (en) | Polycrystalline diamond compact drill | |
| CN208203135U (en) | A kind of novel sharp knuckle-tooth coring bit | |
| CN201193483Y (en) | PDC drill with double-row cutting tooth | |
| CN211230252U (en) | Deep sea drilling directional PDC drill bit | |
| CN202788630U (en) | Polycrystalline diamond compact (PDC) drill bit with sharp teeth | |
| CN203701986U (en) | Steel body spiral five blade PDC (Polycrystalline Diamond Compact) bit | |
| CN209457881U (en) | A kind of PDC drill bit device suitable for gneiss geology | |
| CN203362042U (en) | Polycrystalline diamond compact (PDC) drill bit with low drilling resistance | |
| CN209212160U (en) | It is novel to bore PDC cutter composite drill bit again |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20111021 |