CN203050524U - Helical-blade spiral-flow-passage drill bit - Google Patents
Helical-blade spiral-flow-passage drill bit Download PDFInfo
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- CN203050524U CN203050524U CN 201220610777 CN201220610777U CN203050524U CN 203050524 U CN203050524 U CN 203050524U CN 201220610777 CN201220610777 CN 201220610777 CN 201220610777 U CN201220610777 U CN 201220610777U CN 203050524 U CN203050524 U CN 203050524U
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- drill bit
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- flow
- helical blade
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Abstract
The utility model belongs to the field of petroleum and geological drill bit devices and particularly relates to a helical-blade spiral-flow-passage drill bit, which comprises a drill bit body, and a water passage and a spray nozzle which are arranged on the drill bit body. A helical blade which is integrally welded with the water passage is arranged in the water passage. The spray nozzle is installed at a water outlet of the water passage. The helical-blade spiral-flow-passage drill bit has the beneficial effects that the water sprayed by the drill bit forms a rotating water jet flow, an included angle formed between the rotating water jet flow and stratum rock applies shear force to the rock, the shear force denudes the rock down from a rock mass under the effect of high-pressure liquid flow, the effect of crushing the rock in combination with hydraulic force and mechanical force is reached and the mechanical drilling speed is greatly improved; and since the rotating water jet flow forms stereoscopic rotating drawing force to drive liquid at the bottom of a well to autorotate, the rock debris which is crushed by the teeth of the drill bit is very rapidly cleaned down and is taken to the ground under the effect of water pressure, the secondary crushing effect of the drill bit to the rock debris is reduced and the service life of the drill bit is prolonged.
Description
Technical field
The utility model relates to a kind of helical blade spiral-flow type runner drill bit, belongs to oil, geology drill bit device field.
Background technology
Drill bit is existing at present is the straight barrel type water channel with water channel entirely, use short nozzle, middle long nozzle, extended jet nozzle in rock bit, but this all is the straight barrel type water channel, has just changed jet length.And, middle long nozzle and extended jet nozzle have fragmentation at soft to the utmost point soft formation to rock, and deep-well there is not fragmentation than the rock of hard formation, and these two kinds of nozzles are to use carbide alloy to make, than being easier to fracture, falling into the shaft bottom has great damage to drill bit, influences the operate as normal of drilling well.
Publication number is that 2381764 Chinese patent discloses a kind of bit nozzle, this nozzle has realized making liquid in rotation, reason is that body infundibulate intracavity liquid rate of flow of fluid is fast, also has the spiral generator in the annular space that body and lining center on, so annular space is very little, the high-speed liquid of inner chamber fails to be convened for lack of a quorum and oppositely the silt in the drilling fluid is sucked in the annular space and with plugged annulus, do not have umbrella spiral jet to arrive the shaft bottom, and this design can not form the spiral jet.
The utility model content
The technical problems to be solved in the utility model is: provide a kind of simple and reasonable, and can improve the helical blade spiral-flow type runner drill bit of crushing effect.
The utility model is that the technical scheme that its technical problem of solution adopts is: described helical blade spiral-flow type runner drill bit, comprise drill body and the water channel and the nozzle that are arranged on the drill body, it is characterized in that: be provided with the helical blade integrally welded with water channel in the water channel, the delivery port place of water channel is equipped with nozzle.
The setting of helical blade makes water channel change the water outlet form of bit nozzle, the current that penetrate from nozzle are rotated, bottom rock is formed shearing force, play the effect of fractured rock, the rotary water current of bit nozzle ejaculation simultaneously forms three-dimensional tensile force, thereby has changed the form of bottom-hole flow field, can very fast the shaft bottom be cleaned out, reduce drill teeth to the second-time breakage of landwaste, improved rate of penetration and drilling life of bit; Helical blade is welded in the water channel, does not change the drill bit design shape, has so just guaranteed the safety that drill bit uses, and just requires the drill bit discharge capacity to be the bigger the better.
Described helical blade is set to three, and the center of three helical blade combinations is on the center line of water channel.The structure centre symmetry, reasonable in design, can improve crushing effect.
The material of described helical blade is tungsten-cobalt hard alloy, and the alloying component weight proportion is: tungsten carbide is 92%, and cobalt is 8%.Tungsten-cobalt hard alloy can improve the application life of helical blade.
Described nozzle is interchangeable nozzles.Adopt interchangeable nozzles to increase work efficiency in the use, improve the application life of drill bit.
The beneficial effects of the utility model are:
The water of drill bit ejection forms rotating fluid, the angle that the water jet of rotation and formation rock form has a shearing force to rock, this power is under the effect of highly pressurised liquid stream, rock is degraded from rock mass, so just form the effect of waterpower and mechanically combining fractured rock, increased substantially rate of penetration; Because rotating jet self forms three-dimensional circumgyration stretch power, drive shaft bottom liquid and form rotation, so just the landwaste that the drill teeth fragmentation is got off washes down very soon, under the effect of hydraulic pressure with the landwaste band earthward, reduced the second-time breakage of drill bit to landwaste, improve the drill bit operating efficiency, prolonged the application life of drill bit simultaneously; The rotating jet particle has three-dimensional velocity, does not have the potential core, and maximum effluxvelocity is in the jet-core region, but has the endless belt of a speed maximum, and the shaft bottom is had hydraulic drilling and cleaning and strengthening effect; Under same displacement, total efficiency of breaking rock of rotating jet is but than common jet height.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structure enlarged diagram of water channel.
Fig. 3 is the structural representation of helical blade combination.
Among the figure: 1, drill body 2, water channel 3, helical blade 4, nozzle 5, spiral jet water column.
The specific embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further:
As Fig. 1～shown in Figure 3, helical blade spiral-flow type runner drill bit described in the utility model, comprise drill body 1 and be arranged on water channel 2 and nozzle 4 on the drill body 1 that be provided with the helical blade 3 integrally welded with water channel 2 in the water channel 2, the delivery port place of water channel 2 is equipped with nozzle 4.Helical blade 3 is set to three, and the center of three helical blade combinations is on the center line of water channel 2.
During use, drill body 1 is put into the rock stratum that needs fragmentation, from nozzle 4, can spray spiral jet water column 5.
(1) drill bit that will make according to the method described above carries out indoor broken rock test:
(1) artificial sandstone sample erosion experiment
Be 1: 3 ratio with the weight ratio of 425# model cement and quartz sand (30-60 order), prepared the sandstone sample, quartz sand particle hardness is very big, and rock sample compressive strength is 45MPa.The setting discharge capacity is 160L/min, and spray is apart from being 28mm, and fixedly pump pressure is 7MPa, uses this drill bit and conventional drill erosion sample 4 minutes respectively.The pressure drop of this drill bit nozzle is 9.0MPa, and the pressure drop of conventional drill jet nozzle is 7.0MPa.The contrast of erosion effect is shown in Table 1.
Table 1
Erosion effect by artificial sandstone sample contrasts as can be seen: under same displacement, the impact area of this drill bit is about 3 times of conventional drill, and broken hole volume is about 5 times of conventional drill, and the broken hole degree of depth is about 1/2 of conventional drill.The straight barrel type jet that this explanation, the penetration power of the rotating jet that this drill bit produces when broken produce than conventional drill is if but total efficiency of breaking rock is higher much than conventional drill.
(2) natural sandstone sample erosion experiment
Be on the natural sandstone sample of 16MPa in compressive strength, the setting discharge capacity is 160L/min, and spray is apart from being 28mm, and fixedly pump pressure is 7MPa, uses this drill bit and conventional drill erosion sample 15 seconds respectively.The contrast of erosion effect is shown in Table 2.
Table 2
The rotating jet that this drill bit produces is compared with the straight barrel type jet that conventional drill produces, the crushing effect of erosion natural sandstone has similar rule to the crushing effect of the artificial sandstone sample of erosion, the area and the volume that are the area in the broken hole of rotating jet and volume ratio straight barrel type jet crushing hole are much bigger, but the penetration depth of rotating jet little than straight barrel type jet.This explanation rotating jet is lateral shear power, rock is had significantly degrade effect, and common jet does not degrade effect only perpendicular to the impact force of rock.
Claims (4)
1. helical blade spiral-flow type runner drill bit, comprise drill body (1) and be arranged on water channel (2) and nozzle (4) on the drill body (1), it is characterized in that: be provided with the helical blade (3) integrally welded with water channel (2) in the water channel (2), the delivery port place of water channel (2) is equipped with nozzle (4).
2. helical blade spiral-flow type runner drill bit according to claim 1, it is characterized in that: helical blade (3) is set to three, and the center of three helical blade combinations is on the center line of water channel (2).
3. helical blade spiral-flow type runner drill bit according to claim 1 and 2, it is characterized in that: the material of helical blade (3) is tungsten-cobalt hard alloy.
4. helical blade spiral-flow type runner drill bit according to claim 3, it is characterized in that: nozzle (4) is interchangeable nozzles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220610777 CN203050524U (en) | 2012-11-16 | 2012-11-16 | Helical-blade spiral-flow-passage drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220610777 CN203050524U (en) | 2012-11-16 | 2012-11-16 | Helical-blade spiral-flow-passage drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203050524U true CN203050524U (en) | 2013-07-10 |
Family
ID=48733489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220610777 Expired - Fee Related CN203050524U (en) | 2012-11-16 | 2012-11-16 | Helical-blade spiral-flow-passage drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203050524U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913136A (en) * | 2012-11-16 | 2013-02-06 | 山东国岳金刚石制品有限公司 | Helical-blade spiral-flow type flow-channel drill |
| CN106545298A (en) * | 2015-09-21 | 2017-03-29 | 中国石油天然气股份有限公司 | A kind of vibration type rotating jet drill bit |
-
2012
- 2012-11-16 CN CN 201220610777 patent/CN203050524U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913136A (en) * | 2012-11-16 | 2013-02-06 | 山东国岳金刚石制品有限公司 | Helical-blade spiral-flow type flow-channel drill |
| CN102913136B (en) * | 2012-11-16 | 2015-04-29 | 山东国岳金刚石制品有限公司 | Helical-blade spiral-flow type flow-channel drill |
| CN106545298A (en) * | 2015-09-21 | 2017-03-29 | 中国石油天然气股份有限公司 | A kind of vibration type rotating jet drill bit |
| CN106545298B (en) * | 2015-09-21 | 2018-12-25 | 中国石油天然气股份有限公司 | A kind of oscillatory type rotating jet drill bit |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20161116 |