CN105422008A - Initiatively-guiding chipping-discharging type polycrystalline diamond compact bit - Google Patents
Initiatively-guiding chipping-discharging type polycrystalline diamond compact bit Download PDFInfo
- Publication number
- CN105422008A CN105422008A CN201510895196.XA CN201510895196A CN105422008A CN 105422008 A CN105422008 A CN 105422008A CN 201510895196 A CN201510895196 A CN 201510895196A CN 105422008 A CN105422008 A CN 105422008A
- Authority
- CN
- China
- Prior art keywords
- bit
- chipping
- guide cylinder
- discharging grooves
- polycrystalline diamond
- 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.)
- Pending
Links
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 12
- 239000010432 diamond Substances 0.000 title claims abstract description 12
- 238000007599 discharging Methods 0.000 title abstract 9
- 238000005553 drilling Methods 0.000 claims abstract description 18
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000001154 acute effect Effects 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 238000005520 cutting process Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides an initiatively-guiding discharging type polycrystalline diamond compact bit. A spirally-arranged framework is formed on a cylinder, between a drill handle part and a head crown, of a bit body in an extending mode, a layer of cylindrical tungsten carbide guide cylinder is welded and sintered on the framework of the bit body, a plurality of spiral-groove-shaped chipping discharging grooves are formed in the cylindrical outer surface of the guide cylinder, the spiral direction of the chipping discharging grooves is opposite to the rotating direction of the bit in the drilling process, and chamfers and chipping removing edges are arranged on the two vertical faces of the groove edges of the chipping discharging grooves. By means of the guiding function between the guide cylinder and a well wall, horizontal deflection can be avoided in the drilling process of the whole bit, and the vortex motion preventing performance is improved; by means of the spiral chipping discharging grooves, drilling mud can be lifted along with rotation of the chipping discharging grooves in the rotating process of the bit, initiative chipping discharging of the chipping discharging grooves is changed along with changes of the rotating speed of the bit, and the cleaning effect of the bit is improved; by means of the chamfers and the chipping removing edges, mud cakes on the well wall or drilling chippings detained in a well can be prevented from accumulating under the bit, the smoothness of a well hole is ensured as much as possible, and jamming is eliminated as much as possible.
Description
Technical field:
The present invention relates to field drilling field of tool, be specifically related to the chip removal type polycrystalline diamond compact bit that initiatively leads.
Background technology:
Polycrystalline diamond compact bit is by steel carcass, tungsten carbide sinter layer and the diamond compact composition be arranged on tungsten carbide sinter layer, if the gage surface of drill bit produces shear action to the borehole wall, can destroy the borehole wall makes drill bit produce horizontal movement, mud drainage slot between wing and wing arranges that improper is also cause spoil disposal not smooth, form the main cause of bit balling, current polycrystalline diamond compact bit row cuts to be still and relies on slush pump to cut mode as the passive type row of power, the pressure of mud and flow control cleaning drill bit and discharge rock to cut by thinking, with the situation of creeping into of reality, there is certain gap.
Summary of the invention:
In order to overcome the deficiency in background technology, the present invention's chip removal type polycrystalline diamond compact bit that proposes initiatively to lead solves the problem.
Technical scheme of the present invention is: initiatively lead chip removal type polycrystalline diamond compact bit, comprise drill body, cylinder between the drillstock part of drill body and pileum extends the skeleton of helical arrangement, the cylindrical tungsten carbide guide cylinder of welding sintering one deck on the skeleton of drill body, the cylindrical outer surface of guide cylinder has the chip area of some spiral grooves shapes, and the direction of rotation when hand of spiral of chip area is crept into drill bit is contrary.Described chip area, two facades of its slot wedge, are provided with chamfering towards the facade of drill bit drilling direction and outside diameter, have to cut sword clearly in acute angle shape towards the drill bit edge crept between reciprocal facade and outside diameter.
Described guide cylinder, the ratio of the size of its length and diameter is between 3-4.
The present invention has following beneficial effect: the guide effect between guide cylinder and the borehole wall makes creeping into of whole drill bit to produce horizontal-shift, improve the anti-whirling motion performance of drill bit, spiral-shaped chip area makes drilling mud produce rotation when bit, drilling mud promotes along with the rotation of chip area simultaneously, change the cleaning method with slush pump pressurization that drilling fluid is in the past passive, flow and the pressure of the active spoil disposal slurry of chip area change with the rotating speed change of drill bit, improve the discharge effect that the cleaning of drill bit and rock are cut, chamfering and cut clearly the design of sword, avoid the mud cake on the borehole wall or the drilling cuttings be stranded in well can be piled up under drill bit, to a certain extent just can compacting on drill bit, ensure that well is unimpeded as far as possible, eliminate blocked portion.
Accompanying drawing illustrates:
Accompanying drawing 1 is structural representation of the present invention;
Accompanying drawing 2 is A-A sectional drawings of accompanying drawing 1.
1-drill body in figure, 2-guide cylinder, 3-chip area, 4-skeleton, 5-cuts sword clearly, 6-chamfering.
Detailed description of the invention:
Below in conjunction with accompanying drawing, the invention will be further described:
Shown in Fig. 1 composition graphs 2, initiatively lead chip removal type polycrystalline diamond compact bit, comprise drill body 1, cylinder between the drillstock part of drill body 1 and pileum extends the skeleton 4 of helical arrangement, the cylindrical tungsten carbide guide cylinder 2 of welding sintering one deck on the skeleton 4 of drill body 1, the cylindrical outer surface of guide cylinder 2 has the chip area 3 of some spiral grooves shapes, and the direction of rotation when hand of spiral of chip area 3 is crept into drill bit is contrary.
Described chip area 3, two facades of its slot wedge, chamfering 6 is provided with towards the facade of drill bit drilling direction and outside diameter, have towards the drill bit edge crept between reciprocal facade and outside diameter and cut clearly sword 5 in acute angle shape, chamfering 6 avoids drill bit to damage the borehole wall when creeping into, and the acute angle cutting clearly sword 5 can will be trapped in foreign material on the borehole wall or the rock stratum that do not cut down is cleaned out and is promoted to aboveground during drilling well.
Described guide cylinder 2, the ratio of the size of its length and diameter between 3-4, the ratio of its length and the size of diameter 3-4 chien shih guide effect significantly and do not waste material.
When guide effect between guide cylinder 2 and the borehole wall makes creeping into of whole drill bit, drill bit can only creep into according to the borehole wall of previous drilling well, drill bit can not produce horizontal-shift, improve the anti-whirling motion performance of drill bit, spiral-shaped chip area 3 makes drilling mud produce rotation when bit, drilling mud promotes along with the rotation of chip area 3 simultaneously, change the cleaning method with slush pump pressurization that drilling fluid is in the past passive, flow and the pressure of the active spoil disposal slurry of chip area 3 change with the rotating speed change of drill bit, improve the cleaning performance of drill bit, chamfering 6 and cut clearly the design of sword 6, avoid the mud cake on the borehole wall or the drilling cuttings be stranded in well can be piled up under drill bit, to a certain extent just can compacting on drill bit, ensure that well is unimpeded as far as possible, eliminate blocked portion.
Claims (2)
1. the chip removal type polycrystalline diamond compact bit that initiatively leads, comprise drill body (1), it is characterized in that: the skeleton (4) cylinder between the drillstock part of drill body (1) and pileum extending helical arrangement, the cylindrical tungsten carbide guide cylinder (2) of the upper welding sintering one deck of skeleton (4) of drill body (1), the cylindrical outer surface of guide cylinder (2) has the chip area (3) of some spiral grooves shapes, and the direction of rotation when hand of spiral of chip area (3) is crept into drill bit is contrary;
Described chip area (3), two facades of its slot wedge, be provided with chamfering (6) towards the facade of drill bit drilling direction and outside diameter, have towards the drill bit edge crept between reciprocal facade and outside diameter and cut clearly sword (5) in acute angle shape.
2. the chip removal type polycrystalline diamond compact bit that initiatively leads according to claim 1, is characterized in that: described guide cylinder (2), the ratio of the size of its length and diameter is between 3-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510895196.XA CN105422008A (en) | 2015-12-08 | 2015-12-08 | Initiatively-guiding chipping-discharging type polycrystalline diamond compact bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510895196.XA CN105422008A (en) | 2015-12-08 | 2015-12-08 | Initiatively-guiding chipping-discharging type polycrystalline diamond compact bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105422008A true CN105422008A (en) | 2016-03-23 |
Family
ID=55500504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510895196.XA Pending CN105422008A (en) | 2015-12-08 | 2015-12-08 | Initiatively-guiding chipping-discharging type polycrystalline diamond compact bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105422008A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4717290A (en) * | 1986-12-17 | 1988-01-05 | Homco International, Inc. | Milling tool |
| CN201943585U (en) * | 2010-12-01 | 2011-08-24 | 刘展 | Sapphire helical composite jet-nozzle jet-cutting deep well drilling bit |
| CN202015861U (en) * | 2010-12-27 | 2011-10-26 | 朱冬伟 | Hard alloy trepanning drill with guide strip |
| DE102011085187B3 (en) * | 2011-10-25 | 2012-12-13 | Hilti Aktiengesellschaft | Drill and manufacturing process for a drill |
| CN103962609A (en) * | 2009-06-15 | 2014-08-06 | 三菱综合材料株式会社 | Drill with coolant hole |
| CN104747090A (en) * | 2015-01-23 | 2015-07-01 | 中国石油天然气集团公司 | Inner spiral blade PDC drill bit with inner chip removal function |
-
2015
- 2015-12-08 CN CN201510895196.XA patent/CN105422008A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4717290A (en) * | 1986-12-17 | 1988-01-05 | Homco International, Inc. | Milling tool |
| CN103962609A (en) * | 2009-06-15 | 2014-08-06 | 三菱综合材料株式会社 | Drill with coolant hole |
| CN201943585U (en) * | 2010-12-01 | 2011-08-24 | 刘展 | Sapphire helical composite jet-nozzle jet-cutting deep well drilling bit |
| CN202015861U (en) * | 2010-12-27 | 2011-10-26 | 朱冬伟 | Hard alloy trepanning drill with guide strip |
| DE102011085187B3 (en) * | 2011-10-25 | 2012-12-13 | Hilti Aktiengesellschaft | Drill and manufacturing process for a drill |
| CN104747090A (en) * | 2015-01-23 | 2015-07-01 | 中国石油天然气集团公司 | Inner spiral blade PDC drill bit with inner chip removal function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160323 |
|
| RJ01 | Rejection of invention patent application after publication |