CN203655166U - PDC drill bit drilling fast - Google Patents
PDC drill bit drilling fast Download PDFInfo
- Publication number
- CN203655166U CN203655166U CN201320653096.2U CN201320653096U CN203655166U CN 203655166 U CN203655166 U CN 203655166U CN 201320653096 U CN201320653096 U CN 201320653096U CN 203655166 U CN203655166 U CN 203655166U
- Authority
- CN
- China
- Prior art keywords
- drill bit
- pdc
- wing
- wings
- pdc drill
- 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 - Lifetime
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- 238000005553 drilling Methods 0.000 title claims abstract description 25
- 239000002131 composite material Substances 0.000 claims description 14
- 239000011159 matrix material Substances 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000035515 penetration Effects 0.000 abstract description 6
- 238000005520 cutting process Methods 0.000 abstract description 5
- 239000011435 rock Substances 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Abstract
The utility model discloses a PDC drill bit drilling fast. The drill bit comprises a connector, a base body, wings and PDC compound plates, wherein the connector is connected with the rear end of the base body; the medial axis of the base body is taken as the lower part; the wings are taken as the upper part; an included angle B is formed between the left and right direction and the horizontal direction of the upper surface of the wings, and is smaller than or equal to 45 degrees; the width in the left and right direction of the upper surfaces of the wings W1 is larger than or equal to 35 mm; the width in the left and right direction at the bottom of the wings W2 is larger than or equal to W1-5 mm; an included angle C is formed by the side surface on the screwing side of the wings and the upright direction, and is smaller than or equal to 15 degrees; the PDC compound plates are cylindrical; the axis of the PDC compound plates is in the left and right direction. The wing structure of the PDC drill bit can increase volume of cutting removal grooves, so that cutting removal is relatively smooth, and probability of repeated cutting of rock cuttings is reduced; the phenomenon that penetration rate of the drill bit is affected because the drill bit is restricted to penetrate by the top surfaces of the wings when a floppy bottom layer is drilled is avoided; the drill bit is especially suitable for an offshore drilling project.
Description
Technical field
The utility model relates to a kind of oil, gas drilling drill bit used, relates in particular to a kind of PDC drill bit of fast drilling.
Background technology
Along with oil exploration and exploitation very high to running cost every day of cycle and cost more and more stricter requirement, particularly offshore drilling, improving drill bit rate of penetration, to shorten drilling period be cost-effective effective ways.
In marine drilling, drilling strata mostly is the lower stratum of cementing strength, and drillability is good, and stratum is damaged lower to drill bit.The consideration drill bit structure intensity that traditional PD C drill bit is more, particularly matrix drill bits requires higher to structural strength, cause wing thicker, wing broadens gradually from top to root, cause chip removal area to reduce gradually, restricted to a certain extent landwaste discharge shaft bottom, and may cause the Repeated Cutting of landwaste and shaft bottom solid concentration high, affect drill bit rate of penetration.In addition, the left and right directions of traditional PD C drill bit wing upper surface is level, thus in compared with soft formation because contact area can limit greatly drill bit entirety wedging stratum, thereby reduce the rate of penetration of drill bit.
Utility model content
The purpose of this utility model is just to provide in order to address the above problem a kind of PDC drill bit of fast drilling.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The PDC drill bit of fast drilling described in the utility model comprises joint, matrix, wing and PDC composite sheet, described joint is connected with the rear end of described matrix, described wing is multiple, be distributed on the circumference of described matrix front portion, described PDC composite sheet is located at the surface of leading portion in described wing, between adjacent described wing, forms channel of chip removal; Take the axis of described matrix as below, taking described wing part as top, between the left and right directions of the upper surface of described wing and horizontal direction, be included angle B, included angle B≤45 °, width W 1 >=the 35mm of the upper surface left and right directions of described wing, width W 2 >=the W1-5mm of the bottom left and right directions of described wing, is angle C between the side surface of described wing precession one side and vertical direction, angle C≤15 °.
As preferably, described PDC composite sheet is cylindrical and its axis is left and right directions, and the length of described PDC composite sheet left and right directions is L, 30mm >=L >=16mm.
Particularly, the rule footpath of described PDC drill bit is 8.5 inches.
Described PDC drill bit is preferably steel body bit.
The beneficial effects of the utility model are:
The wing structure of PDC drill bit described in the utility model, can increase chip area volume, makes chip removal more unobstructed, reduces landwaste and repeatedly cuts probability; Boring, to meet soft bottom be to there will not be wing end face restriction drill bit wedging and the problem that affects drill bit rate of penetration; Cylindrical PDC composite sheet can make drill bit fast drilling wear-resisting; Adopt the higher steel body bit of intensity can ensure the structural strength of drill bit wing.PDC drill bit described in the utility model is particularly useful for marine drilling engineering.
Brief description of the drawings
Fig. 1 is that the stereochemical structure of the PDC drill bit of fast drilling described in the utility model is to have figure;
Fig. 2 is the sectional structure schematic diagram of the A-A direction of wing described in the utility model in Fig. 1.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As depicted in figs. 1 and 2, the PDC drill bit of fast drilling described in the utility model comprises joint 1, matrix 2, wing 4 and PDC composite sheet 5, joint 1 is connected with the rear end (being lower end shown in Fig. 1) of matrix 2, wing 4 is multiple, be distributed on the circumference of matrix 2 front portions, PDC composite sheet 5 is located at the surface of leading portion in wing 4, forms channel of chip removal (unmarked in figure) between adjacent wing 4, taking the axis of matrix 2, (in Fig. 1 as vertical vertical line) is as below, taking wing 4 place parts, as top, (that sets here is upper, below is upper with Fig. 2's, below is consistent, but upper with Fig. 1, below is different), as shown in Figure 2, between the left and right directions of the upper surface E of wing 4 and horizontal direction, be included angle B, included angle B≤45 °, in this example, be about 20 °, width W 1 >=the 35mm of the upper surface E left and right directions of wing 4, width W 2 >=the W1-5mm of the bottom left and right directions of wing 4, between the side surface D of wing 4 precession one sides (being left side in Fig. 2) and vertical direction, be angle C, angle C≤15 °, this example is about 12 °.
As depicted in figs. 1 and 2, PDC composite sheet 5 is cylindrical and its axis is left and right directions, and the length of PDC composite sheet 5 left and right directions is L, 30mm >=L >=16mm; In this example, PDC drill bit is steel body bit, and its rule footpath is 8.5 inches.In Fig. 1, also showing wing 4 is gauge 3 near the part of joint 1, and the gauge 3 of this drill bit is compared the gauge of traditional PDC drill bit and wanted narrower.
In conjunction with Fig. 1 and Fig. 2, when actual well drilled, drilling bit high-speed rotary, the PDC composite sheet 5 of drill bit front portion and circumference is cut rock stratum, make the continuous wedging of drill bit realize drilling well, the core of getting Shi Gai region, core region of drill bit front central position is reaching just fracture after certain length simultaneously, and post-rift core is discharged by chip area with drilling fluid, does test.The special quadrilateral cross section structure of this drill bit, can increase chip area volume, make chip removal more unobstructed, reduce landwaste and repeatedly cut probability, to meet soft bottom be to there will not be the end face restriction drill bit wedging of wing 4 and the problem that affects drill bit rate of penetration boring, and is particularly useful for marine drilling engineering.
Claims (5)
1. the PDC drill bit of a fast drilling, comprise joint, matrix, wing and PDC composite sheet, described joint is connected with the rear end of described matrix, described wing is multiple, be distributed on the circumference of described matrix front portion, described PDC composite sheet is located at the surface of leading portion in described wing, between adjacent described wing, forms channel of chip removal; It is characterized in that: take the axis of described matrix as below, taking described wing part as top, between the left and right directions of the upper surface of described wing and horizontal direction, be included angle B, included angle B≤45 °, width W 1 >=the 35mm of the upper surface left and right directions of described wing, width W 2 >=the W1-5mm of the bottom left and right directions of described wing, is angle C between the side surface of described wing precession one side and vertical direction, angle C≤15 °.
2. the PDC drill bit of fast drilling according to claim 1, is characterized in that: described PDC composite sheet is cylindrical and its axis is left and right directions, and the length of described PDC composite sheet left and right directions is L, 30mm >=L >=16mm.
3. the PDC drill bit of fast drilling according to claim 1 and 2, is characterized in that: the rule footpath of described PDC drill bit is 8.5 inches.
4. the PDC drill bit of fast drilling according to claim 3, is characterized in that: described PDC drill bit is steel body bit.
5. the PDC drill bit of fast drilling according to claim 1 and 2, is characterized in that: described PDC drill bit is steel body bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320653096.2U CN203655166U (en) | 2013-10-22 | 2013-10-22 | PDC drill bit drilling fast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320653096.2U CN203655166U (en) | 2013-10-22 | 2013-10-22 | PDC drill bit drilling fast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203655166U true CN203655166U (en) | 2014-06-18 |
Family
ID=50921566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320653096.2U Expired - Lifetime CN203655166U (en) | 2013-10-22 | 2013-10-22 | PDC drill bit drilling fast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203655166U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104110218A (en) * | 2014-07-30 | 2014-10-22 | 淮南市利升工贸有限责任公司 | Three wing drill bit |
-
2013
- 2013-10-22 CN CN201320653096.2U patent/CN203655166U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104110218A (en) * | 2014-07-30 | 2014-10-22 | 淮南市利升工贸有限责任公司 | Three wing drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140618 |