CN203867474U - Drill bit structure suitable for fast drilling pelinite - Google Patents
Drill bit structure suitable for fast drilling pelinite Download PDFInfo
- Publication number
- CN203867474U CN203867474U CN201320881240.8U CN201320881240U CN203867474U CN 203867474 U CN203867474 U CN 203867474U CN 201320881240 U CN201320881240 U CN 201320881240U CN 203867474 U CN203867474 U CN 203867474U
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- China
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- drill bit
- hydrophthalmia
- cutting teeth
- runner
- water holes
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Abstract
The utility model discloses a drill bit structure suitable for fast drilling pelinite. The mechanical drilling rate can be increased. The drill bit structure comprises a drill bit machine body with a flow pass arranged on the axis, cutting teeth and water holes are formed in the front end of the drill bit machine body respectively, the water holes tilt outwards to be formed in the front end of the drill bit machine body, the water holes are communicated with the flow pass, and the axes of the water holes and the tail end faces of the cutting teeth are arranged on the same straight line. Compared with the prior art, the water holes which tilt outwards are formed in the front end of the drill bit machine body, the axes of the water holes and the tail end faces of the cutting teeth are arranged on the same straight line, the original mode that mud impacts a shaft bottom downwards in the direction parallel to a cutter wing is changed into the mode that the mud sprays to the tail end faces of the cutting teeth in a tilting mode, under drive of the rotating speed of a drill bit, water power can quickly jet a pelinite bottom layer to be damaged, the local pressure of the acting surface of the drill bit is lowered, the drill bit can better enter the bottom layer in a cutting mode, the cutting teeth can be cooled quickly, and the service life of the drill bit is prolonged.
Description
Technical field
The utility model relates to a kind of oilfield drilling technology, particularly a kind of drill bit structure that is applicable to plastic shale.
Background technology
At present, for the petroleum resources of recovery of subterranean, need to utilize drilling tool to drill subsurface formations; These drilling tools are from ground to underground derrick, drill string and the drill bit of generally comprising successively.Wherein thereby drill bit cuts and creeps into well stratum.But some stratum is plastic behavior, stratum is not easy to be cut, and cutting teeth is difficult to wedging stratum; In the situation that particularly drilling fluid density is higher, bottom rock is subject to the impact of drilling well liquid columnpressure, can produce one " chip hold down effect ", and the result of chip hold down effect has been brought at the landwaste in shaft bottom and produced too much repetition fragmentation and cutting.These sticky mixing of filter cake that are repeated to become after cutting particulate landwaste, fine powder and shaft bottom form shaft bottom covering layer, in mud stone, drilling well even forms the gob that viscosity is very large, and it and shaft bottom covering layer have formed " bed course " between bit cone and tooth and bottom rock." chip hold down effect " is larger, and the thickness of shaft bottom bed course and compaction are just larger, thereby have affected drilling speed, have accelerated the wearing and tearing of drill bit.For low permeability formation and impermeability stratum, drilling fluid can not enter crackle in time, makes crackle internal pressure extremely low, and now pressure reduction is approximately bottom pressure, and " chip hold down effect " is more obvious, and rate of penetration can be slower, and bit wear can be more serious.
When mud stone rapid lapse of time creeps into, cause and return the rising of outlet drilling fluid temperature, the temperature resistance ability of preventer and drilling-fluid circulation system is formed to immense pressure, high temperature also can cause drilling fluid materials accelerated ageing simultaneously; Low rate of penetration causes the cutting repeatedly of landwaste, causes drilling fluid soil content constantly to increase, and adds that drilling fluid materials is aging, and drilling fluid rheology runs down; Along with drilling fluid rheology worsens, annular pressure lost increases, and a series of difficult problems such as leakage risk increasing will be following.
Summary of the invention
The purpose of this utility model is to provide a kind of drill bit structure that is applicable to plastic shale fast drilling, and the technical problem that solve is to improve rate of penetration, increases the service life.
The utility model is by the following technical solutions: a kind of drill bit structure that is applicable to plastic shale fast drilling, comprise that its axis is provided with the drill bit body of runner, be respectively equipped with cutting teeth and hydrophthalmia at the front end of drill bit body, the outward-dipping front end that is arranged on drill bit body of described hydrophthalmia, hydrophthalmia is communicated with runner, and the axis of described hydrophthalmia and the terminal surface of cutting teeth are arranged on same straight line.
Hydrophthalmia of the present utility model is provided with 7, described hydrophthalmia is distributed between the wing of drill bit body, on the front end of drill bit body, the axis of hydrophthalmia is arranged on same straight line with the terminal surface of adjacent cutting teeth respectively, and the rear end of each hydrophthalmia is communicated with near the flow path wall of bottom with runner.
The flow path wall of runner of the present utility model is provided with erosion resistance layer.
Erosion resistance layer of the present utility model is separately positioned on the flow path wall of a week that the bottom of runner and runner and hydrophthalmia join.
The thickness of erosion resistance layer of the present utility model is 2.2mm.
On the flow path wall of a week that erosion resistance layer surfacing of the present utility model joined at the bottom of runner and runner and hydrophthalmia.
The utility model compared with prior art, at the front end of drill bit body, outward-dipping hydrophthalmia is set, and the axis of hydrophthalmia and the terminal surface of cutting teeth are arranged on same straight line, make mud impact shaft bottom downwards and change into and tilt to spray to cutting teeth terminal surface by original wing direction that is parallel to, under the drive of bit speed, waterpower can be sprayed fast by destroyed plastic shale bottom, reduce drill bit acting surface local pressure, be conducive to cutting and enter bottom, promote the destruction of rock, also favourable cutting teeth is carried out cooling fast, extend drilling life of bit.
Brief description of the drawings
Fig. 1 is internal construction schematic diagram of the present utility model.
Fig. 2 is the positional structure schematic diagram of the utility model hydrophthalmia.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figure 1, the drill bit structure that is applicable to plastic shale fast drilling of the present utility model, comprise drill bit body 1, the axis direction of drill bit body 1 is provided with runner 5, on the wing of drill bit body 1, be respectively equipped with cutting teeth 3, be respectively equipped with hydrophthalmia 2 at the front end of drill bit body 1, the outward-dipping front end that is arranged on drill bit body 1 of hydrophthalmia 2, hydrophthalmia 2 is funnel-shaped structure, the rear end of hydrophthalmia 2 is communicated with near the flow path wall of bottom with runner 5, the terminal surface 6 of the axis of described hydrophthalmia 2 and cutting teeth 3 is arranged on same straight line, on the one week flow path wall joining at the bottom of runner 5 and runner 5 and hydrophthalmia 2, be provided with the erosion resistance layer 4 that thickness is 2.2mm, on the flow path wall of a week that these erosion resistance layer 4 surfacings are joined at the bottom of runner 5 and runner 5 and hydrophthalmia 2.
It is that the nickel material of 70% tungsten carbide and 30% is made and formed that described erosion resistance layer 4 adopts percentage by weight, and the method that surfacing method can combine for oxy-acetylene, laser melting coating or plasma arc welding (PAW) becomes erosion resistance on the flow path wall of a week that 4 surfacings join at the bottom of runner 5 and runner 5 and hydrophthalmia 2.
As shown in Figure 2, hydrophthalmia 2 is provided with 7, all centered by the axis of drill bit body 1, outward-dipping setting, hydrophthalmia 2 is distributed between the wing of drill bit body 1, on the front end of drill bit body 1, the axis of the adjacent and hydrophthalmia 2 of the terminal surface 6 of hydrophthalmia 2 and cutting teeth 3 is arranged on same straight line with the terminal surface 6 of adjacent cutting teeth 3 respectively, and the rear end of each hydrophthalmia 2 is communicated with near the flow path wall of bottom with runner 5.
The utility model concrete operation method is as follows:
One, this drill bit is connected to drill string bottom, and G.I.H;
Two, bore while meeting new stratum, adjust waterpower according to corresponding jet size;
Three, operation procedure creeps into operation routinely.
The utlity model has (1) simple in structure, cost of investment is low; (2) mud impacts shaft bottom downwards by original wing direction that is parallel to, change over the terminal surface that tilts to spray to cutting teeth, under the drive of bit speed, waterpower can be sprayed fast by destroyed plastic shale stratum, reduce drill bit acting surface local pressure, be conducive to cutting teeth wedging stratum, promote the destruction of rock; (3) cutting teeth of drill bit is in the time destroying bottom rock, due to the very large cutting force of needs, in working angles, the cutting teeth that is destroying bottom rock can produce high temperature, high temperature can be accelerated the destruction of drill bit, hydrophthalmia flows to the cooling cutting teeth doing work fast, is conducive to improve bit life.(4) erosion resistance layer being set on flow path wall and hydrophthalmia increases the abrasion-resistance of drill bit internal runner
The utility model is easy to operate, can be in oil gas field extensive use.
Claims (6)
1. one kind is applicable to the drill bit structure of plastic shale fast drilling, comprise that its axis is provided with the drill bit body (1) of runner (5), be respectively equipped with cutting teeth (3) and hydrophthalmia (2) at the front end of drill bit body (1), it is characterized in that: the outward-dipping front end that is arranged on drill bit body (1) of described hydrophthalmia (2), hydrophthalmia (2) is communicated with runner (5), and the terminal surface (6) of the axis of described hydrophthalmia (2) and cutting teeth (3) is arranged on same straight line.
2. the drill bit structure that is applicable to plastic shale fast drilling according to claim 1, it is characterized in that: described hydrophthalmia (2) is provided with 7, described hydrophthalmia (2) is distributed between the wing of drill bit body (1), on the front end of drill bit body (1), the axis of hydrophthalmia (2) is arranged on same straight line with the terminal surface (6) of adjacent cutting teeth (3) respectively, and the rear end of each hydrophthalmia (2) is communicated with near the flow path wall of bottom with runner (5).
3. the drill bit structure that is applicable to plastic shale fast drilling according to claim 1 and 2, is characterized in that: the flow path wall of described runner (5) is provided with erosion resistance layer (4).
4. the drill bit structure that is applicable to plastic shale fast drilling according to claim 3, is characterized in that: described erosion resistance layer (4) is separately positioned on the flow path wall of a week that the bottom of runner (5) and runner (5) and hydrophthalmia (2) join.
5. the drill bit structure that is applicable to plastic shale fast drilling according to claim 4, is characterized in that: the thickness of described erosion resistance layer (4) is 2.2mm.
6. the drill bit structure that is applicable to plastic shale fast drilling according to claim 5, is characterized in that: on the flow path wall of a week that described erosion resistance layer (4) surfacing is joined at the bottom of runner (5) and runner (5) and hydrophthalmia (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320881240.8U CN203867474U (en) | 2013-12-30 | 2013-12-30 | Drill bit structure suitable for fast drilling pelinite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320881240.8U CN203867474U (en) | 2013-12-30 | 2013-12-30 | Drill bit structure suitable for fast drilling pelinite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203867474U true CN203867474U (en) | 2014-10-08 |
Family
ID=51648444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320881240.8U Expired - Fee Related CN203867474U (en) | 2013-12-30 | 2013-12-30 | Drill bit structure suitable for fast drilling pelinite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203867474U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453724A (en) * | 2014-10-17 | 2015-03-25 | 中国石油天然气集团公司 | Long nozzle alloy bit used for oilfield drilling |
| CN105888559A (en) * | 2016-05-09 | 2016-08-24 | 中国石油天然气股份有限公司 | PDC (polycrystalline diamond compact) drill bit applicable to mud rock |
| CN110924872A (en) * | 2018-09-20 | 2020-03-27 | 中国石油天然气股份有限公司 | Drill bit for reverse circulation drilling |
| CN111255383A (en) * | 2020-03-31 | 2020-06-09 | 西南石油大学 | Dysmorphism gradual change formula geophysical prospecting drill bit runner structure |
-
2013
- 2013-12-30 CN CN201320881240.8U patent/CN203867474U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453724A (en) * | 2014-10-17 | 2015-03-25 | 中国石油天然气集团公司 | Long nozzle alloy bit used for oilfield drilling |
| CN105888559A (en) * | 2016-05-09 | 2016-08-24 | 中国石油天然气股份有限公司 | PDC (polycrystalline diamond compact) drill bit applicable to mud rock |
| CN110924872A (en) * | 2018-09-20 | 2020-03-27 | 中国石油天然气股份有限公司 | Drill bit for reverse circulation drilling |
| CN111255383A (en) * | 2020-03-31 | 2020-06-09 | 西南石油大学 | Dysmorphism gradual change formula geophysical prospecting drill bit runner structure |
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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: 20141008 Termination date: 20201230 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |