CN2365388Y - Drilling bit with complex cutting structure - Google Patents
Drilling bit with complex cutting structure Download PDFInfo
- Publication number
- CN2365388Y CN2365388Y CN 98222580 CN98222580U CN2365388Y CN 2365388 Y CN2365388 Y CN 2365388Y CN 98222580 CN98222580 CN 98222580 CN 98222580 U CN98222580 U CN 98222580U CN 2365388 Y CN2365388 Y CN 2365388Y
- Authority
- CN
- China
- Prior art keywords
- tsp
- pdc
- drill bit
- composite sheet
- pdc composite
- 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
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- Earth Drilling (AREA)
Abstract
The utility model belongs to the improvement of the structure of a PDC drill bit for drilling wells of petroleum and geology, which is mainly composed of a drill bit body, PDC composite sheets, a knife wing, TSP (thermostable polycrystalline diamond) teeth and a nozzle, wherein, the front end of the knife wing is welded with a row of PDC composite sheets, and the back end is welded with a row of TSP (thermostable polycrystalline diamond) teeth. The PDC composite sheets form a main cutting structure, the TSP teeth form an auxiliary cutting structure, and the main cutting structure and the auxiliary cutting structure form a composite structure. The utility model can efficiently drill soft-hard staggered and anisotropic strata with multiple sandwich layers, and can improve the operating performance of the PDC drill bit.
Description
The utility model belongs to the architecture advances of oil and geological drilling usefulness PDC drill bit.
Conventional PDC drill bit has in the soft of homogeneous or medium hardness stratum that rate of penetration is fast, the life-span long, the drilling depth advantages of higher, but when creeping in the inhomogeneous formation of, many interlayers staggered in soft or hard, service behaviour is very poor, the PDC composite sheet is easy to generate cracked and the excessive wear phenomenon, causes drill bit to damage in advance.Its main cause is that the PDC drill bit is with the cut mode fractured rock, and when soft or hard stratum interface creeps into, the structure of drill bit makes some PDC sheet bear very big twisting resistance, causes drill bit twisting vibration and axial vibration easily, causes the coming off of cracked or diamond layer of PDC composite sheet.Because the compressive strength height of hard interbedded layer must strengthen the pressure of the drill and just can make PDC composite sheet wedging stratum effectively, cause the PDC composite sheet to destroy easily owing to high temperature wear takes place.
The purpose of this utility model provides a kind of combined cut structure drill bit of can be staggered in soft or hard, effectively creeping in the inhomogeneous formation of many interlayers.The utility model mainly is made up of bit body, PDC composite sheet, wing, TSP (TSP) tooth and nozzle.With the PDC composite sheet is the main cutting structure, and the TSP tooth is the assisted machining structure, and they form the combined cut structure.
The utility model is in wing front end welding one row PDC composite sheet, rear end welding one row TSP (TSP) tooth: about the proud exposure low 1.0mm of TSP (TSP) tooth on the same wing same radius, and be arranged in PDC composite sheet 10～20mm place afterwards than PDC composite sheet; TSP (TSP) tooth has comprised the TSP of different shape.The PDC composite sheet of front end is the main cutting structure, and the TSP tooth of rear end is the assisted machining structure, and the TSP tooth is lower than the proud exposure of PDC composite sheet.
Compare with conventional PDC drill bit, when the utility model creeps into, have all properties characteristics of conventional PDC drill bit in soft formation.When the soft or hard interface of many interlayers creeps into; the utility model still cuts based on the PDC composite sheet; but the TSP tooth of its back has participated in partly cutting; bear part the pressure of the drill, limited the cutting output of drill bit revolution, reduced the Oscillation Amplitude of drill bit; reduced the PDC composite sheet because the suffered temporary impact load of vibration; protect the PDC composite sheet, guaranteed that drill bit steadily creeps into, prolonged the application life of drill bit.When creeping in hard interbedded layer, the structural TSP tooth of combined cut has plough plane effect to rock, marks groove at rock surface, has increased the degree of freedom of rock surface, makes the relatively easy fractured rock of PDC composite sheet; The TSP tooth has been born part the pressure of the drill simultaneously, has reduced the high temperature wear that the PDC composite sheet produces greatly owing to the pressure of the drill.TSP tooth assisted machining structure can reduce the moment excessive load that the PDC composite sheet is born greatly in axial, horizontal and twisting vibration, avoid or reduced the impact failure or the high temperature wear of PDC composite sheet, thereby prevented the damage in advance of drill bit.After passing hard formation, creep into conventional PDC drill bit is equally normal again.Therefore when creeping in the stratum of the utility model, many interlayers staggered, have advantages such as rate of penetration height, the life-span is long, drilling depth is Duoed, can save a large amount of drilling costs, have remarkable economic efficiency than conventional PDC drill bit in soft or hard.
Figure of description:
Fig. 1. a kind of combined cut structure drill bit schematic diagram
Description of drawings:
1. bit body 2.PDC composite sheet 3. wing 4.TSP teeth 5. nozzles
Now the utility model will be further described in conjunction with Figure of description:
The utility model is the composition combined cut structure of assisting based on PDC composite sheet [2], with TSP tooth [4], they are to be undertaken arranged evenly by design separately on wing, about the proud exposure low 1.0mm of TSP tooth [4] than PDC composite sheet [2], TSP tooth [4] distance P DC composite sheet [2] 10～20mm, TSP tooth [4] can be the TSP of cube, cuboid, cylinder, cone and different shape.In drilling process, at first the utility model and other downhole tool are coupled together, at the bottom of the lower going-into-well, turn on pump is by downhole tool inner chamber, bit body [1] inner chamber and nozzle [5] circulating fluid then, start slewing downhole tool is rotated, and add the pressure of the drill and make its rotation fractured rock.When in homogeneous formation, creeping into, the utlity model has the performance characteristics of conventional PDC drill bit.When the soft or hard interface of many interlayers creeps into, the utility model still cuts based on PDC composite sheet [2], but TSP tooth [4] has been born part the pressure of the drill, the cutting output of restriction revolution, and along with the wearing and tearing of PDC composite sheet [2], TSP tooth [4] has plough plane effect to rock, marks groove on the hard formation surface, makes the relatively easy fractured rock of PDC composite sheet [2].Simultaneously, TSP tooth [4] structure can reduce the moment excessive load that PDC composite sheet [2] is born greatly in axial, horizontal and twisting vibration, avoid or reduced the impact failure or the high temperature wear of PDC composite sheet [2], thereby prevented the damage in advance of drill bit.When creeping on many interlayers stratum like this, the utility model has better economic benefit than conventional PDC drill bit.
Claims (3)
1. combined cut structure drill bit, mainly form by bit body [1], PDC composite sheet [2], wing [3], TSP tooth [4] and nozzle [5], it is characterized in that being sintered to fix row's TSP tooth [4] in wing [3] rear end in wing [3] front end welding one row's PDC composite sheet [2].
2. combined cut structure drill bit according to claim 1 is characterized in that about the proud exposure low 1.0mm of TSP tooth [4] on same wing [3] same radius than PDC composite sheet [2], and is arranged in PDC composite sheet [2] 10～20mm place afterwards.
3. combined cut structure drill bit according to claim 1 is characterized in that TSP tooth [4] has comprised the TSP of different shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98222580 CN2365388Y (en) | 1998-10-09 | 1998-10-09 | Drilling bit with complex cutting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98222580 CN2365388Y (en) | 1998-10-09 | 1998-10-09 | Drilling bit with complex cutting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2365388Y true CN2365388Y (en) | 2000-02-23 |
Family
ID=33973881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98222580 Expired - Fee Related CN2365388Y (en) | 1998-10-09 | 1998-10-09 | Drilling bit with complex cutting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2365388Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362444A (en) * | 2013-07-24 | 2013-10-23 | 中国地质大学（武汉） | Drill for cutting-grinding wing type oil and gas drilling |
| CN105275403A (en) * | 2014-07-01 | 2016-01-27 | 中国石油化工集团公司 | A plowing type PDC drill bit suitable for hard formations |
| CN112324342A (en) * | 2020-11-05 | 2021-02-05 | 中国石油集团渤海钻探工程有限公司 | Near-ground jet PDC drill bit |
| CN115805666A (en) * | 2022-12-16 | 2023-03-17 | 汨罗市福缘新材料有限公司 | Fettling milling cutter suitable for graphite product |
-
1998
- 1998-10-09 CN CN 98222580 patent/CN2365388Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362444A (en) * | 2013-07-24 | 2013-10-23 | 中国地质大学（武汉） | Drill for cutting-grinding wing type oil and gas drilling |
| CN103362444B (en) * | 2013-07-24 | 2016-10-26 | 中国地质大学（武汉） | A kind of cutting-grinding fin type oil/gas drilling drill bit |
| CN105275403A (en) * | 2014-07-01 | 2016-01-27 | 中国石油化工集团公司 | A plowing type PDC drill bit suitable for hard formations |
| CN112324342A (en) * | 2020-11-05 | 2021-02-05 | 中国石油集团渤海钻探工程有限公司 | Near-ground jet PDC drill bit |
| CN115805666A (en) * | 2022-12-16 | 2023-03-17 | 汨罗市福缘新材料有限公司 | Fettling milling cutter suitable for graphite product |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |