CN2150322Y - Steel-body PDC drilling-bit with two core - Google Patents
Steel-body PDC drilling-bit with two core Download PDFInfo
- Publication number
- CN2150322Y CN2150322Y CN 93230631 CN93230631U CN2150322Y CN 2150322 Y CN2150322 Y CN 2150322Y CN 93230631 CN93230631 CN 93230631 CN 93230631 U CN93230631 U CN 93230631U CN 2150322 Y CN2150322 Y CN 2150322Y
- Authority
- CN
- China
- Prior art keywords
- steel body
- column
- pdc
- drilling
- diplocardia
- 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 drilling bit with two cores for oil drilling. The utility model is formed by the combination of a blade type eccentric steel body provided with a fully open chip removing groove, and a column-shaped PDC cutting piece, wherein the column-shaped PDC cutting piece is embedded and arranged in an interference fit mode, and column-shaped hard alloy is used as protecting blocks. The manufacturing technology is simplified, the quality of the drilling bit is increased, and the cost of well drilling is reduced.
Description
The utility model belongs to the architecture advances of oil drilling with diplocardia PDC drill bit.
Deepen in the operation in operation of oil well sidetracking and OW, adopt diplocardia PDC drill bit, can get out a larger-diameter well, help improving cementing quality.At easy undergauge interval, adopt diplocardia PDC drill bit to creep into, can reduce lock of tool drilling.
The diplocardia PDC drill bit that adopts is carcass structure at present, and chip PDC cutting members is welded on the bit matrix, and natural diamond or man-made polycrystalline diamond sintering are used the footpath of going bail for (as the diplocardia PDC drill bit of Christensen company manufacturing) on bit body.This kind method, drill bit structure and manufacturing process are all very complicated, difficult quality guarantee, and cost height.
The utility model improves at above-mentioned defective, adopt eccentric steel body ［ 1 ］ structure of blade type, on steel body ［ 1 ］, have standard-sized sheet and put chip area ［ 4 ］, with interference fit insert column PDC cutting members ［ 2 ］, column shaped carbide alloy ［ 3 ］ is installed in the footpath of going bail on the steel body ［ 1 ］ with interference fit, and keeps column PDC cutting members ［ 2 ］ to be full exposure state.
The utility model and present carcass diplocardia PDC drill bit result of use are suitable, but structure and manufacturing process simplify greatly, reliable in quality, and cost descends significantly.Figure of description:
Fig. 1, a kind of steel body diplocardia PDC drill bit front view
Fig. 2, a kind of steel body diplocardia PDC drill bit left view
Description of drawings:
1, steel body 2, column PDC cutting members
3, column shaped carbide alloy 4, chip area 5, nozzle
Now in conjunction with Figure of description, the utility model will be further described:
In drilling process, at first steel body diplocardia PDC drill bit is connected with other drilling tool of down-hole, at the bottom of the lower going-into-well, begin the rotary drilling of pressurizeing then.Because steel body of the present utility model ［ 1 ］ has eccentric structure, thereby can get out a well bigger than nominal size in rotary course.Like this, can increase the annular clearance between the sleeve pipe and the borehole wall, help improving cementing quality.If use the utility model to creep into, also be because the borehole diameter that gets out is big, and can prevent lock of tool drilling at easy undergauge interval.Because the abrasion resistance of PDC cutting members ［ 2 ］ is strong, efficiency of breaking rock is high and be full exposure state and be installed on the steel body ［ 1 ］, and have standard-sized sheet on the steel body ［ 1 ］ and put chip area ［ 4 ］, thus the utlity model has that rate of penetration is fast, the life-span is long, the drilling depth advantages of higher.In oil well sidetracking and other drillng operation, use the utility model can obtain huge economic benefit and remarkable social benefit.
Claims (3)
1, a kind of steel body diplocardia PDC drill bit is characterized in that adopting having standard-sized sheet and putting the eccentric steel body of blade type [1] of chip area [4] and combine with column PDC cutting members [2].
2, steel body diplocardia PDC drill bit according to claim 1 is characterized in that column PDC cutting members ［ 2 ］ is installed on the steel body ［ 1 ］ with interference fit, and is full exposure state.
3, steel body diplocardia PDC drill bit according to claim 1 is characterized in that adopting column shaped carbide alloy ［ 3 ］ to protect the footpath, and is installed on the steel body ［ 1 ］ with interference fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93230631 CN2150322Y (en) | 1993-04-03 | 1993-04-03 | Steel-body PDC drilling-bit with two core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93230631 CN2150322Y (en) | 1993-04-03 | 1993-04-03 | Steel-body PDC drilling-bit with two core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2150322Y true CN2150322Y (en) | 1993-12-22 |
Family
ID=33807245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93230631 Expired - Fee Related CN2150322Y (en) | 1993-04-03 | 1993-04-03 | Steel-body PDC drilling-bit with two core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2150322Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404435A (en) * | 2021-07-12 | 2021-09-17 | 潍坊盛德石油机械制造有限公司 | Eccentric drill bit and drilling equipment |
-
1993
- 1993-04-03 CN CN 93230631 patent/CN2150322Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404435A (en) * | 2021-07-12 | 2021-09-17 | 潍坊盛德石油机械制造有限公司 | Eccentric drill bit and drilling equipment |
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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 |