CN207004433U - Yangtze Cambrian system shale gas exploitation combined bitses during one kind is applicable - Google Patents
Yangtze Cambrian system shale gas exploitation combined bitses during one kind is applicable Download PDFInfo
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- CN207004433U CN207004433U CN201720853303.7U CN201720853303U CN207004433U CN 207004433 U CN207004433 U CN 207004433U CN 201720853303 U CN201720853303 U CN 201720853303U CN 207004433 U CN207004433 U CN 207004433U
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- cutting
- cutting edge
- bitses
- face
- shale gas
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Abstract
The utility model discloses a kind of Yangtze Cambrian system shale gas exploitation combined bitses in being applicable, including drill body, have inside the drill body and rinse chamber, body front end has cutting portion, outstanding formation circular arc top surface at the top of cutting portion, what the cutting portion protruded is provided with three equally distributed main cutting edges, the main cutting edge extends to circular arc top surface and crossed in circular arc top surface, the gap location that the circular arc top surface is located at cutting edge intersection is provided with three nozzles, the nozzle connects with drill body interior flushing chamber, the cutting portion is additionally provided with collar, there is perforate on the collar, perforate connects with rinsing chamber, collar top is connected with the secondary cutting face of sphere, some granular front cutting edges are inlayed on the secondary cutting face.The utility model combines the advantage of PDC drill bit and rock bit, while drilling efficiency is improved, expands the scope of application of drill bit, reduces cost, suitable for middle Yangtze Cambrian system shale gas exploitation.
Description
Technical field
It the utility model is related to field drilling tool field, and in particular to Yangtze Cambrian system shale gas exploitation is compound during one kind is applicable
Type drill bit.
Background technology
Composite polycrystal-diamond (Polycrystalline Diamond Compact) drill bit, abbreviation PDC drill bit.It
It is with polycrystalline diamond (thin discs shape) to make small-sized cutting blocks insert or be sintered on bit body and what is formed be applied to soft arrive
Medium ground.
At the beginning of last century, rock bit replaces drag bit to be applied on abrasive hardcoat stratum, but this drill bit is boring shale
The shortcomings that with other flowing rock formations is mainly that chip hold down causes shaft bottom mud drum, and as brill is deep and bottom pressure and mud
The increase of proportion, mud drum phenomenon can be more serious.In order to solve this problem, each bit manufacturers enter to rock bit for many years
Various improvement are gone, but have produced little effect.It is smaller by being influenceed in this regard in view of drag bit or fixed cutter drill bits,
People begin attempt to two kinds of drill bits being combined.With the popularization and application of PDC drill bit, and the improvement of PDC cutting tooth technologies, Gu
Determine cutting tooth PDC drill bit and gradually substitute rock bit in a variety of stratum.But in hard, abrasive layer and complicated Directional Drilling
In well operations, due to the limitation of performance, PDC drill bit can not substitute rock bit.Therefore, research and development one kind combines PDC drill bit and tooth
The combined bitses for taking turns drill bit advantage are very necessary.
Utility model content
For the deficiency in the presence of prior art, the utility model provides a kind of Yangtze Cambrian system shale gas in being applicable
Combined bitses are exploited, combine PDC drill bit and rock bit advantage.
To achieve the above object, the utility model employs following technical scheme：
Yangtze Cambrian system shale gas exploitation combined bitses during one kind is applicable, including drill body, in the drill body
Portion, which has, rinses chamber, and body front end has cutting portion, the outstanding formation circular arc top surface in cutting portion top, and the cutting portion is dashed forward
What is gone out is provided with three equally distributed main cutting edges, and the main cutting edge extends to circular arc top surface and handed in circular arc top surface
Converge, main cutting edge forms from the cutting face along body radial direction and in camber line to the back of the body knife face that body surface extends, the back of the body knife face
On inlay and be provided with some cutting tips, the cutting tip lines up two row, and first row cutting tip is located at cutting face and back of the body knife
The top of face handing-over, secondary series cutting tip is located on back of the body knife face and, the circular arc top surface parallel with first row cutting tip
The gap location of cutting edge intersection is provided with three nozzles, the nozzle connects with drill body interior flushing chamber, described
Cutting parts are additionally provided with the collar for tilting and stretching out to cutting portion top outer between three cutting edges, on the collar
There is perforate, perforate connects with drill body interior flushing chamber, and collar top is connected with the secondary cutting face of sphere, the secondary cutting
Some granular front cutting edges are inlayed on face.
Further, the spherical Outer Diameter that the front cutting edge summit is formed is formed no more than first row cutting tip summit
Circumference range, in perforate, carry out work mainly by main cutting edge, prevent the damping of front cutting edge from disturbing, improve perforate speed.
Further, the main cutting edge is twist coiled on drill body, and the hand of spiral is bowed from circular arc top surface
Line of vision right rotation, the drilling for meeting most of drilling tools turn to custom, when reducing the impact to main cutting edge during drilling, while exiting
Faster.
Further, the drill body, cutting portion, main cutting edge and collar are integrally formed, and increase structural strength.
Further, the collar and the access section in secondary cutting face are provided with sealing ring, prevent cutting fluid leakage from influenceing
Rinse.
Further, the first row cutting tip cutter hub is embedded in cutting face and cutting edge tilts to cutting face, Ke Yibao
The first cutting tip is protected, while improves cutting angle, makes cutting faster.
Further, the front cutting edge is Surface of Sphere, and front cutting edge is mainly used in rock stratum in harder working environment
Grind, the blade of sphere is more beneficial for being ground.
When in use, main cutting edge is used for perforate to the utility model, when running into compared with hard formation, main cutting edge can be pressurized and
Shrinking and even wear, now then grind hard rock stratum by front cutting edge, two row main cutting edges can mutually aid in using, and first
When row main cutting edge is cut, secondary series, which serves, to be broken up, and prevents mud drum, and during first row serious wear, secondary series can play guarantor
Footpath acts on, and prevents varying aperture, while extend the service life of drill bit.
The utility model combines the advantage of PDC drill bit and rock bit, while drilling efficiency is improved, expands brill
The scope of application of head, reduces cost, suitable for middle Yangtze Cambrian system shale gas exploitation.
Brief description of the drawings
Fig. 1 is a kind of vertical view knot for being applicable middle Yangtze Cambrian system shale gas exploitation combined bitses embodiment of the utility model
Structure schematic diagram.
Fig. 2 is a kind of section knot for being applicable middle Yangtze Cambrian system shale gas exploitation combined bitses embodiment of the utility model
Structure schematic diagram.
Reference is as follows：
11st, main cutting edge；12nd, secondary cutting face；13rd, front cutting edge；14th, drill body；15th, sealing ring；16th, knife face is carried on the back；
17th, cutting tip；18th, main cutting edge；19th, collar
Embodiment
In order that technological means, creation characteristic, reached purpose and effect that the utility model is realized are easy to understand, under
Face combines and is specifically illustrating, and the utility model is expanded on further.
As shown in Figure 1 and Figure 2, it is a kind of to be applicable middle Yangtze Cambrian system shale gas exploitation combined bitses, including drill body
14, the inside of drill body 14, which has, rinses chamber, and body front end has cutting portion, the outstanding formation circular arc in cutting portion top
Shape top surface, what the cutting portion protruded is provided with three equally distributed main cutting edges 11, and the main cutting edge 11 extends to circle
Arc top surface simultaneously crosses in circular arc top surface, and main cutting edge 11 is from the cutting face along the radial direction of drill body 14 and in camber line to body
The back of the body knife face 16 of surface extension forms, and is inlayed on the back of the body knife face and is provided with some cutting tips 17, the cutting tip is lined up
Two row, first row cutting tip are located at the top that cutting face joins with carrying on the back knife face 16, and secondary series cutting tip is on back of the body knife face
And it is parallel with first row cutting tip, the gap location that the circular arc top surface is located at cutting edge intersection is provided with three nozzles
18, the nozzle 18 connects with drill body interior flushing chamber, the cutting parts be additionally provided between three cutting edges to
Cutting portion top outer tilts the collar 19 stretched out, there is perforate, perforate and drill body interior flushing chamber on the collar
Connection, the top of collar 19 are connected with the secondary cutting face 12 of sphere, and some granular secondary cuttings are inlayed on the secondary cutting face
Sword 13；The drill bit of this structure combines the characteristics of PDC edge drilling bits and rock bit, when perforate is crept into, by main cutting
Sword 11, and when running into hard rock stratum, then make crushing rock formation by front cutting edge crush and grind, pass through collar inside secondary cutting face
Connected with rinsing chamber, heat caused by being ground can be taken away by flushing liquor in time, front cutting edge is cooled down.
As shown in Fig. 2 during cutting, A is online for the peak institute of main cutting edge perforate, and the maximum that B-B ' forms perforate is straight
Footpath, front cutting edge are located at below A lines and within B-B ', can bear shearing force by main cutting edge in perforate, and main cutting edge
In first row cutting tip cutter hub insertion cutting face and cutting edge tilts to cutting face, improves cutting angle, bears the same of shearing force
When protect main cutting edge not to be broken to greatest extent, when running into hard rock stratum, main cutting edge can be pressurized contraction in addition wear, now
A lines reduce, and B-B ' reduces, and front cutting edge has started shear action.
In order to effectively play shear action, the spacing on front cutting edge top and main cutting edge top should set reasonable value,
The cutting height of column of front cutting edge formation is set as h, a diameter of l, the cutting height of column of normal main cutting edge formation is
H, a diameter of L, the cutting height of column formed after normal main cutting edge compression is H1, a diameter of L1；Set secondary cutting face rotation
The height of column formed when turning is h ', a diameter of l ', and the cutting height of column that the main cutting edge of greatest wear is formed is H2, diameter
For L2；Then H2≤h '≤H1 ＜ h ＜ H, L2≤l '≤L1 ＜ l ＜ L, it can so fully ensure that front cutting edge maximal efficiency works
While again secondary cutting face is not lost.
In a preferred embodiment of the present utility model, spherical Outer Diameter that the front cutting edge summit is formed is no more than the
The circumference range that one row cutting tip summit is formed, in perforate, carrys out work mainly by main cutting edge, prevents front cutting edge
Damping interference, improves perforate speed.
In a preferred embodiment of the present utility model, the main cutting edge is twist coiled on drill body,
The hand of spiral is overlooked to right rotation from circular arc top surface, and the drilling for meeting most of drilling tools turns to custom, reduces to master during drilling
The impact of cutting edge, while when exiting faster.
In a preferred embodiment of the present utility model, the drill body, cutting portion, main cutting edge and collar one
It is body formed, increase structural strength.
In a preferred embodiment of the present utility model, the collar and the access section in secondary cutting face are provided with sealing
Circle 15, prevent cutting fluid leakage from influenceing to rinse.
In a preferred embodiment of the present utility model, the front cutting edge is Surface of Sphere, and front cutting edge is mainly used in
Rock stratum is ground in harder working environment, the blade of sphere is more beneficial for being ground.
When in use, main cutting edge is used for perforate to the utility model, when running into compared with hard formation, main cutting edge can be pressurized and
Shrinking and even wear, now then grind hard rock stratum by front cutting edge, two row main cutting edges can mutually aid in using, and first
When row main cutting edge is cut, secondary series, which serves, to be broken up, and prevents mud drum, and during first row serious wear, secondary series can play guarantor
Footpath acts on, and prevents varying aperture, while extend the service life of drill bit.
Finally illustrate, above example is only unrestricted to illustrate the technical solution of the utility model, although ginseng
The utility model is described in detail according to preferred embodiment, it will be understood by those within the art that, can be to this
The technical scheme of utility model is modified or equivalent substitution, without departing from the objective and model of technical solutions of the utility model
Enclose, it all should cover among right of the present utility model.
Claims (7)
- Yangtze Cambrian system shale gas exploitation combined bitses during 1. one kind is applicable, including drill body, it is characterised in that the brill Head body interior, which has, rinses chamber, and body front end has a cutting portion, and outstanding formation circular arc top surface, described at the top of cutting portion What cutting portion protruded is provided with three equally distributed main cutting edges, and the main cutting edge extends to circular arc top surface and in circular arc Shape top surface crosses, and main cutting edge forms from the cutting face along body radial direction and in camber line to the back of the body knife face that body surface extends, institute State to inlay on back of the body knife face and be provided with some cutting tips, the cutting tip lines up two row, and first row cutting tip is positioned at cutting Face and the top of back of the body knife face handing-over, secondary series cutting tip is located on back of the body knife face and, the circle parallel with first row cutting tip The gap location that arc top surface is located at cutting edge intersection is provided with three nozzles, and the nozzle connects with drill body interior flushing chamber Logical, the cutting parts are additionally provided with the collar for tilting and stretching out to cutting portion top outer between three cutting edges, described There is perforate on collar, perforate connects with drill body interior flushing chamber, and collar top is connected with the secondary cutting face of sphere, institute State and some granular front cutting edges are inlayed on secondary cutting face.
- A kind of 2. applicable middle Yangtze Cambrian system shale gas exploitation combined bitses as claimed in claim 1, it is characterised in that institute The spherical Outer Diameter for stating the formation of front cutting edge summit is no more than the circumference range that first row cutting tip summit is formed.
- A kind of 3. applicable middle Yangtze Cambrian system shale gas exploitation combined bitses as claimed in claim 1, it is characterised in that institute Main cutting edge is stated twist to be coiled on drill body.
- A kind of 4. applicable middle Yangtze Cambrian system shale gas exploitation combined bitses as claimed in claim 1, it is characterised in that institute Drill body, cutting portion, main cutting edge and collar is stated to be integrally formed.
- A kind of 5. applicable middle Yangtze Cambrian system shale gas exploitation combined bitses as claimed in claim 1, it is characterised in that institute State collar and the access section in secondary cutting face is provided with sealing ring.
- A kind of 6. applicable middle Yangtze Cambrian system shale gas exploitation combined bitses as claimed in claim 1, it is characterised in that institute State in first row cutting tip cutter hub insertion cutting face and cutting edge tilts to cutting face.
- A kind of 7. applicable middle Yangtze Cambrian system shale gas exploitation combined bitses as claimed in claim 1, it is characterised in that institute It is Surface of Sphere to state front cutting edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720853303.7U CN207004433U (en) | 2017-07-14 | 2017-07-14 | Yangtze Cambrian system shale gas exploitation combined bitses during one kind is applicable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720853303.7U CN207004433U (en) | 2017-07-14 | 2017-07-14 | Yangtze Cambrian system shale gas exploitation combined bitses during one kind is applicable |
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| Publication Number | Publication Date |
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| CN207004433U true CN207004433U (en) | 2018-02-13 |
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ID=61454680
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| CN201720853303.7U Active CN207004433U (en) | 2017-07-14 | 2017-07-14 | Yangtze Cambrian system shale gas exploitation combined bitses during one kind is applicable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107143287A (en) * | 2017-07-14 | 2017-09-08 | 宜昌神达石油机械有限公司 | Yangtze Cambrian system shale gas exploitation combined bitses during one kind is applicable |
-
2017
- 2017-07-14 CN CN201720853303.7U patent/CN207004433U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107143287A (en) * | 2017-07-14 | 2017-09-08 | 宜昌神达石油机械有限公司 | Yangtze Cambrian system shale gas exploitation combined bitses during one kind is applicable |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 443001 Three Gorges private science and Technology Park, Hubei, Yichang Patentee after: Yichang Shenda Technology Co., Ltd Address before: 443001 Three Gorges private science and Technology Park, Hubei, Yichang Patentee before: YICHANG SHENDA PETROMACHINE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |