CN102086756A - Hole-dilating drill for pressure reduction and speed acceleration - Google Patents
Hole-dilating drill for pressure reduction and speed acceleration Download PDFInfo
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- CN102086756A CN102086756A CN 201110061709 CN201110061709A CN102086756A CN 102086756 A CN102086756 A CN 102086756A CN 201110061709 CN201110061709 CN 201110061709 CN 201110061709 A CN201110061709 A CN 201110061709A CN 102086756 A CN102086756 A CN 102086756A
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Abstract
The invention discloses a hole-dilating drill for pressure reduction and speed acceleration, which comprises a drill body composed of an upper joint, a cutting body and a lower joint from the top to the bottom, wherein the diameter of the cutting body is greater than the diameter of the upper joint and the diameter of the lower joint; a plurality of spiral chip-removal grooves are uniformly arranged on the peripheral surface of the cutting body along the circumferential direction of the cutting body, and a spiral blade is formed between every two chip-removal grooves; the axial center of the upper joint of the drill body is provided with a main runner, the main runner extends to the lower part of the cutting body, the bottom of the main runner is coaxially provided with a communicated assistant runner, the hole diameter of the assistant runner is less than that of the main runner, and the assistant runner passes though the lower joint; and acclivitous water holes respectively facing each chip-removal groove are thoroughly arranged on the hole wall of the main runner. The drilling speed of the hole-dilating drill for pressure reduction and speed acceleration is increased through adopting a hole-dilating mode, thus the damage to the drill can be reduced; and a local low pressure swirl area can be produced at a pit bottom, thereby reducing the chip hold force of rock debris at the pit bottom, realizing the accelerated swabbing and removal of the rock debris at the pit bottom, reducing the repeated fragmentation of the rock debris, and improving the drilling speed.
Description
Technical field
The invention relates to the drilling tool in oil and the geological drilling engineering field, relate in particular to a kind of reaming type decompression speed-raising drill bit.
Background technology
For the petroleum resources of recovery of subterranean, need utilize drilling tool to drill subsurface formations; These drilling tools from ground to underground derrick, rotating disk, kelly bar, drilling rod, drill collar and the drill bit of generally comprising successively; Wherein thereby drill bit cuts the stratum and creeps into well.Produce a large amount of landwaste in the time of the bit cutting stratum in the shaft bottom, for these landwaste are scavenged into ground, must be when creeping into by the inner drilling fluid that injects of drill string, these drilling fluids turn back to ground from the drill bit ejection and through the annular space between drill string and the stratum, thereby landwaste is carried to ground.Yet drilling fluid produces a very large fluid column press force to the shaft bottom, for example, for 3000 meters dark wells, uses density to be 1.1g/cm
3The drilling fluid drilling well, such pressure will reach 33MPa.The water hole Way out of existing drill bit is to be directed downwards along well depth, and with drill axis positive direction angle be 0 °～60 °, drilling fluid flows out the back and directly impacts the shaft bottom from the water hole, under huge press force effect, the landwaste that bit cutting gets off by pressure holding in the shaft bottom, thereby be unfavorable for the removing of landwaste, greatly reduced the landwaste elimination efficiency.Particularly in the drilling process of deep-well and ultradeep well, huge drilling fluid fluid column press force will greatly influence the timely removing of landwaste, causes the repetition fragmentation of drill bit; For the well section of stratum more complicated, such as to containing gravel gritstone stratum, the tooth stress of drill bit outermost is more abominable, phenomenon such as wear out failure, broken teeth, broken tooth very easily occur or come off causes drill bit to lose aggressiveness, and drilling speed descends, reduce drilling efficiency, increased drilling cost.
For the broken problem of the repetition that solves drill bit, people are by improving the drilling fluid pump discharge capacity, increasing pump pressure, and the method that adopts various nozzle combinations and change nozzle arrangements, rely on the impact force of high-pressure water jet increase to the shaft bottom, realize the broken rock of water jet and mechanically combining.Yet this method has strengthened the press force of drilling fluid fluid column to the shaft bottom landwaste, and particularly in deep-well and ultradeep well drilling well, because huge drilling well liquid columnpressure, simple dependence high-pressure spray means improve drilling speed effect and not obvious; For the serious problem of the peripheral tooth inefficacy of drill bit, the scene, oil field does not have solution effectively, only is by reducing the methods such as drill bit of the pressure of the drill, rotating speed or employing higher level, reduce drill bit and damage, still so just having sacrificed rate of penetration.
In view of this, the inventor relies on relevant design and manufacturing experience for many years, proposes a kind of reaming type decompression speed-raising drill bit, to overcome the defective of prior art.
Summary of the invention
The object of the present invention is to provide a kind of reaming type decompression speed-raising drill bit, can realize reducing the drilling fluid column pressure of shaft bottom drill bit acting surface, avoid the peripheral tooth of drill bit to damage, guarantee the application life of drill bit, thereby improve drilling speed.
The object of the present invention is achieved like this, a kind of reaming type decompression speed-raising drill bit, and this drill bit comprises drill body, and this drill body is made of top connection, cutting body and lower contact from top to bottom, and the diameter of described cutting body is greater than the diameter of top connection and lower contact; It circumferentially evenly is provided with a plurality of spirality chip areas in the outer peripheral face upper edge of described cutting body, forms the spirality wing between the chip area; Top connection axial centre at described drill body is provided with a sprue, and this sprue extends to the bottom of cutting body, and the sprue bottom is coaxial to be provided with a secondary channels that is communicated with, and the aperture of described secondary channels is less than the aperture of sprue and connect lower contact; On the hole wall of described sprue, connect to each chip area respectively an acclivitous water hole is set.
In a better embodiment of the present invention, the angle of the axis in described each water hole and drill body axis is α, 0 °＜α＜90 °.
In a better embodiment of the present invention, the space angle of the helix of described each chip area and drill body axis is β, 0 °≤β＜90 °.
In a better embodiment of the present invention, the outside of described each wing is provided with a plurality of polycrystalline diamond PDC composite sheet.
In a better embodiment of the present invention, described top connection is provided with for the external screw thread that is connected with drill string; Described lower contact is provided with for the internal thread that is connected with another drill bit, and the diameter of described another drill bit is less than the diameter of the described bit cutting body that should raise speed.
In a better embodiment of the present invention, be fixed with a flow divider in the described sprue, described flow divider is a column, it is axially arranged with a runner that connects, be provided with a plurality of shunting blind holes straight down at the end face of described flow divider and around this runner, the quantity of described shunting blind hole is identical with the quantity in described water hole; Each is shunted the blind hole bottom and is provided with a commutation water hole to the perforation of the flow divider column outside respectively; The outlet in the described water hole of respectively commutating and relative sprue water hole import conducting.
In a better embodiment of the present invention, the diameter of described runner is less than the diameter of described secondary channels.
In a better embodiment of the present invention, the setting that is inclined upwardly of described commutation water hole, the angle of inclination in commutation water hole is identical with the angle of inclination in described water hole.
In a better embodiment of the present invention, the end difference of the base abuts of described flow divider between sprue and secondary channels, the top of flow divider is fixed by an internal circlip.
In a better embodiment of the present invention, described sprue is a circular hole, and described flow divider is a cylinder, is provided with circumferential location structure between the inwall of described sprue and the outer wall of flow divider.
From the above mentioned, reaming type decompression speed-raising drill bit of the present invention has changed the situation of existing single drill bit full-face drilling, adopt two drill bits to creep into simultaneously, wherein, another small bits below fractured rock at first, form the well of reduced size, the reaming type decompression speed-raising drill bit of top carries out reaming to established well; The water hole Way out that will have drill bit simultaneously now is tilted to by being adjusted into downwards, and with the drill axis angle be 0 °～90 °, drilling fluid is tilted to from the water hole and sprays to deviate from the shaft bottom direction, under the drive by the drill bit rotary speed, form a low pressure whirlpool district near the drill bit acting surface, thereby the drilling fluid fluid column press force in shaft bottom is reduced, the shaft bottom landwaste is under action of pressure up and down, left the shaft bottom by pumping in time, return ground with drilling fluid.Reaming type decompression speed-raising drill bit on the one hand of the present invention adopts the reaming mode to improve drilling speed, reduced the damage of single drill bit full-face drilling to drill bit; On the other hand, produce a local depression whirlpool district, reduce the chip hold down of shaft bottom landwaste, realize pumping, quicken the removing of landwaste, reduce the repetition fragmentation of landwaste, improve drilling speed the shaft bottom landwaste in the shaft bottom.
Description of drawings
The following drawings only is intended to the present invention done and schematically illustrates and explain, not delimit the scope of the invention.Wherein:
Fig. 1: be the perspective view of reaming type decompression speed-raising drill bit of the present invention.
Fig. 2: be the main TV structure schematic diagram of reaming type decompression speed-raising drill bit of the present invention.
Fig. 3: be the structural representation of the drill body of reaming type of the present invention decompression speed-raising drill bit.
Fig. 4: the structural representation that flow divider is set in the drill body for reaming type decompression speed-raising drill bit of the present invention.
Fig. 5: be the elevational schematic view of Fig. 4.
Fig. 6: be the perspective view of flow divider among the present invention.
Fig. 7: be the sectional structure schematic diagram of flow divider among the present invention.
Fig. 8: be the schematic diagram of reaming type decompression speed-raising drill bit full-face drilling of the present invention.
The specific embodiment
Understand for technical characterictic of the present invention, purpose and effect being had more clearly, now contrast description of drawings the specific embodiment of the present invention.
As Fig. 1, Fig. 2, shown in Figure 3, the present invention proposes a kind of reaming type decompression speed-raising drill bit 100, this drill bit 100 comprises drill body 1, this drill body 1 is made of top connection 11, cutting body 12 and lower contact 13 from top to bottom, and the diameter of described cutting body 12 is greater than the diameter of top connection 11 and lower contact 13; It circumferentially evenly is provided with a plurality of spirality chip areas 121 in the outer peripheral face upper edge of described cutting body 12, forms spirality wing 122 between the chip area 121, and the outside of described each wing 122 is welded with a plurality of polycrystalline diamond PDC composite sheet 1221; As shown in Figure 3, top connection 11 axial centre at described drill body are provided with a sprue 2, this sprue 2 extends to the bottom of cutting body 12, and sprue 2 bottoms are coaxial to be provided with a secondary channels 3 that is communicated with, and the aperture of described secondary channels 3 is less than the aperture of sprue 2 and connect lower contact 13; On the hole wall of described sprue 2, connect to each chip area 121 respectively an acclivitous water hole 21 is set.In the present embodiment, described water hole 21 is provided with 3-6.In the present embodiment, described top connection 11 is provided with for the external screw thread that is connected with the drill string (not shown); Described lower contact 13 is provided with for the internal thread that is connected with another drill bit 6 (as shown in Figure 8), and the diameter of described another drill bit 6 is less than the diameter of the described bit cutting body 12 that should raise speed, and this another drill bit 6 can be rock bit or PDC drill bit.
When using reaming type decompression of the present invention to raise speed drill bit 100 full-face drillings, its top connection 11 is connected with drill string by external screw thread, and lower contact 13 links to each other with another drill bit 6 by internal thread.In the drilling process, drill string drives reaming type decompression speed-raising drill bit 100 and another drill bit 6 rotations, this another undersized drill bit 6 is fractured rock at first, form a small size well 7, reaming type decompression speed-raising drill bit 100 carries out reaming to small size well 7 subsequently and creeps into, and forms final well 8 (as shown in Figure 8).Drilling fluid enters the sprue 2 of reaming type decompression speed-raising drill bit in the drill string, and a part of drilling fluid enters secondary channels 3, and clean and cool off another small bits 6, and cutting carring; Another part drilling fluid enters water hole 21, and 21 are tilted to ejection from the water hole; Rotation along with reaming type decompression speed-raising drill bit 100, under the drive of chip area 121, move in a circle around borehole axis, whirlpool appears between the annular space of drill body 1 external surface and well, produce a low-pressure area in the whirlpool bottom, the drilling fluid fluid column is reduced at the press force in shaft bottom, and landwaste is left the shaft bottom by pumping, returns ground with drilling fluid.
In the present embodiment, as shown in Figure 3, the angle of the axis in described each acclivitous water hole 21 and drill body 1 axis is α, 0 °＜α＜90 °.As shown in Figure 2, the space angle of the helix of described each chip area 121 and drill body 1 axis is β, 0 °≤β＜90 °.
Further, in the present embodiment, as Fig. 4, Fig. 5, Fig. 6 and shown in Figure 7, be fixed with a flow divider 4 in the described sprue 2, described flow divider 4 is the steel casting of a column, and it is axially arranged with a runner 41 that connects, and the diameter of this runner 41 is less than the diameter of described secondary channels 3; Be provided with a plurality of shunting blind holes 42 straight down at the end face of described flow divider 4 and around this runner 41, the quantity of described shunting blind hole 42 is identical with the quantity in described water hole 21; Each is shunted blind hole 42 bottoms and is provided with a commutation water hole 43 to the perforation of the flow divider 4 columns outside respectively; The outlet in the described water hole 43 of respectively commutating connects with the 21 import conductings of relative sprue water hole.In the present embodiment, described commutation water hole 43 setting that is inclined upwardly, the angle of inclination identical with the angle of inclination in described water hole 21 (as shown in Figure 7) in commutation water hole 43.
Be provided with that this flow divider 4 helps that drilling fluid compiles and 21 spray from the water hole.Through the shunting action of flow divider 4, a part of drilling fluid enters runner 41 and secondary channels 3, is used for cleaning and cooling drill bit 6; Another part drilling fluid enters shunting blind hole 42, and the commutation water hole 43 of flowing through 21 is tilted to ejaculation from the water hole.
In the present embodiment, because the aperture of described secondary channels 3 is less than the aperture of sprue 2, therefore, boundary at major and minor runner forms an end difference (as shown in Figure 3), the base abuts of described flow divider 4 is at this end difference, the top of flow divider 4 is by an internal circlip 5 fixing (as shown in Figure 4), and check ring 5 is fastened in the sprue 2 interior corresponding annular grooves 22.
In the present embodiment, described sprue 2 is a circular hole, described flow divider 4 is a cylinder, be provided with circumferential location structure between the inwall of described sprue and the outer wall of flow divider, for example: in the cylindrical sidewall of flow divider 4 slide block of protrusion is set, corresponding chute (not shown) is set at the circular-hole internal-wall of sprue 2.
From the above mentioned, reaming type decompression speed-raising drill bit of the present invention has changed the situation of existing single drill bit full-face drilling, adopt two drill bits to creep into simultaneously, wherein, another small bits below fractured rock at first, form the well of reduced size, the reaming type decompression speed-raising drill bit of top carries out reaming to established well; The water hole Way out that will have drill bit simultaneously now is tilted to by being adjusted into downwards, and with the drill axis angle be 0 °～90 °, drilling fluid is tilted to from the water hole and sprays to deviate from the shaft bottom direction, under the drive by the drill bit rotary speed, form a low pressure whirlpool district near the drill bit acting surface, thereby the drilling fluid fluid column press force in shaft bottom is reduced, the shaft bottom landwaste is under action of pressure up and down, left the shaft bottom by pumping in time, return ground with drilling fluid.Reaming type decompression speed-raising drill bit on the one hand of the present invention adopts the reaming mode to improve drilling speed, reduced the damage of single drill bit full-face drilling to drill bit; On the other hand, produce a local depression whirlpool district, reduce the chip hold down of shaft bottom landwaste, realize pumping, quicken the removing of landwaste, reduce the repetition fragmentation of landwaste, improve drilling speed the shaft bottom landwaste in the shaft bottom.
The above only is the schematic specific embodiment of the present invention, is not in order to limit scope of the present invention.Any those skilled in the art, equivalent variations of having done under the prerequisite that does not break away from design of the present invention and principle and modification all should belong to the scope of protection of the invention.
Claims (10)
1. reaming type decompression speed-raising drill bit, it is characterized in that: this drill bit comprises drill body, and this drill body is made of top connection, cutting body and lower contact from top to bottom, and the diameter of described cutting body is greater than the diameter of top connection and lower contact; It circumferentially evenly is provided with a plurality of spirality chip areas in the outer peripheral face upper edge of described cutting body, forms the spirality wing between the chip area; Top connection axial centre at described drill body is provided with a sprue, and this sprue extends to the bottom of cutting body, and the sprue bottom is coaxial to be provided with a secondary channels that is communicated with, and the aperture of described secondary channels is less than the aperture of sprue and connect lower contact; On the hole wall of described sprue, connect to each chip area respectively an acclivitous water hole is set.
2. reaming type decompression speed-raising drill bit as claimed in claim 1, it is characterized in that: the angle of the axis in described each water hole and drill body axis is α, 0 °＜α＜90 °.
3. reaming type decompression speed-raising drill bit as claimed in claim 1, it is characterized in that: the space angle of the helix of described each chip area and drill body axis is β, 0 °≤β＜90 °.
4. reaming type decompression speed-raising drill bit as claimed in claim 1, it is characterized in that: the outside of described each wing is provided with a plurality of polycrystalline diamond PDC composite sheet.
5. reaming type decompression speed-raising drill bit as claimed in claim 1, it is characterized in that: described top connection is provided with for the external screw thread that is connected with drill string; Described lower contact is provided with for the internal thread that is connected with another drill bit, and the diameter of described another drill bit is less than the diameter of the described bit cutting body that should raise speed.
6. reaming type decompression speed-raising drill bit as claimed in claim 1, it is characterized in that: be fixed with a flow divider in the described sprue, described flow divider is a column, it is axially arranged with a runner that connects, be provided with a plurality of shunting blind holes straight down at the end face of described flow divider and around this runner, the quantity of described shunting blind hole is identical with the quantity in described water hole; Each is shunted the blind hole bottom and is provided with a commutation water hole to the perforation of the flow divider column outside respectively; The outlet in the described water hole of respectively commutating and relative sprue water hole import conducting.
7. reaming type decompression speed-raising drill bit as claimed in claim 6, it is characterized in that: the diameter of described runner is less than the diameter of described secondary channels.
8. reaming type as claimed in claim 6 decompression speed-raising drill bit is characterized in that: settings that be inclined upwardly of described commutation water hole, the angle of inclination in the water hole of commutating is identical with the angle of inclination in described water hole.
9. reaming type decompression speed-raising drill bit as claimed in claim 6, it is characterized in that: the end difference of the base abuts of described flow divider between sprue and secondary channels, the top of flow divider is fixed by an internal circlip.
10. reaming type decompression speed-raising drill bit as claimed in claim 6, it is characterized in that: described sprue is a circular hole, described flow divider is a cylinder, is provided with circumferential location structure between the inwall of described sprue and the outer wall of flow divider.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110061709 CN102086756A (en) | 2011-03-15 | 2011-03-15 | Hole-dilating drill for pressure reduction and speed acceleration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110061709 CN102086756A (en) | 2011-03-15 | 2011-03-15 | Hole-dilating drill for pressure reduction and speed acceleration |
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| CN102086756A true CN102086756A (en) | 2011-06-08 |
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| CN 201110061709 Pending CN102086756A (en) | 2011-03-15 | 2011-03-15 | Hole-dilating drill for pressure reduction and speed acceleration |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635315A (en) * | 2012-04-27 | 2012-08-15 | 中国地质大学（武汉） | Joint with hole-repairing drill bit |
| CN103556953A (en) * | 2013-11-14 | 2014-02-05 | 山东国岳金刚石制品有限公司 | Bottom hole negative-pressure upward-going spray nozzle PDC drill bit |
| CN104131785A (en) * | 2014-08-06 | 2014-11-05 | 四川万吉金刚石钻头有限公司 | Single-cone PDC concentric RWD drill bit |
| CN104968884A (en) * | 2012-12-28 | 2015-10-07 | 哈利伯顿能源服务公司 | BHA surge relief system |
| GB2528761A (en) * | 2014-07-21 | 2016-02-03 | Schlumberger Holdings | Downhole rotary cutting tool |
| CN107842316A (en) * | 2017-06-24 | 2018-03-27 | 邓立宇 | A kind of speed-raising drill bit of shaft bottom local reduction |
| CN107859494A (en) * | 2017-11-30 | 2018-03-30 | 宜昌钻山甲科技有限责任公司 | A kind of transit joint and down-the-hole air hammer and drilling rod with spiral deslagging diverter function |
| CN108746100A (en) * | 2018-06-22 | 2018-11-06 | 四川金易管业有限公司 | One kind is except gluing mechanism in pipeline |
| CN110242217A (en) * | 2019-06-10 | 2019-09-17 | 王文昭 | A kind of earth-boring bits |
| US10415318B2 (en) | 2013-12-06 | 2019-09-17 | Schlumberger Technology Corporation | Expandable reamer |
| US10501995B2 (en) | 2014-07-21 | 2019-12-10 | Schlumberger Technology Corporation | Reamer |
| US10508499B2 (en) | 2014-07-21 | 2019-12-17 | Schlumberger Technology Corporation | Reamer |
| US10519722B2 (en) | 2014-07-21 | 2019-12-31 | Schlumberger Technology Corporation | Reamer |
| US10584538B2 (en) | 2014-07-21 | 2020-03-10 | Schlumberger Technology Corporation | Reamer |
| CN110905395A (en) * | 2019-12-31 | 2020-03-24 | 中国石油集团川庆钻探工程有限公司 | Well drilling speed-increasing system capable of changing bottom hole confining pressure distribution by middle energy gathering |
| US10612309B2 (en) | 2014-07-21 | 2020-04-07 | Schlumberger Technology Corporation | Reamer |
| CN112096296A (en) * | 2020-11-12 | 2020-12-18 | 胜利油田固邦石油装备有限责任公司 | PDC drill bit for grinding fin type oil gas drilling |
| CN112196468A (en) * | 2020-10-15 | 2021-01-08 | 东北石油大学 | Hydraulic drive reaming while drilling tool |
| CN113404438A (en) * | 2021-07-28 | 2021-09-17 | 潍坊盛德石油机械制造有限公司 | Pressure-reducing and speed-increasing PDC diamond bit |
| CN115492520A (en) * | 2022-11-17 | 2022-12-20 | 胜利油田万和石油工程技术有限责任公司 | Cutting rock-breaking mixed PDC drill bit |
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Cited By (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635315A (en) * | 2012-04-27 | 2012-08-15 | 中国地质大学（武汉） | Joint with hole-repairing drill bit |
| CN104968884A (en) * | 2012-12-28 | 2015-10-07 | 哈利伯顿能源服务公司 | BHA surge relief system |
| CN103556953A (en) * | 2013-11-14 | 2014-02-05 | 山东国岳金刚石制品有限公司 | Bottom hole negative-pressure upward-going spray nozzle PDC drill bit |
| US10415318B2 (en) | 2013-12-06 | 2019-09-17 | Schlumberger Technology Corporation | Expandable reamer |
| US10704332B2 (en) | 2014-07-21 | 2020-07-07 | Schlumberger Technology Corporation | Downhole rotary cutting tool |
| GB2528761B (en) * | 2014-07-21 | 2017-07-12 | Schlumberger Holdings | Downhole rotary cutting tool |
| GB2528761A (en) * | 2014-07-21 | 2016-02-03 | Schlumberger Holdings | Downhole rotary cutting tool |
| US10612309B2 (en) | 2014-07-21 | 2020-04-07 | Schlumberger Technology Corporation | Reamer |
| US10501995B2 (en) | 2014-07-21 | 2019-12-10 | Schlumberger Technology Corporation | Reamer |
| US10508499B2 (en) | 2014-07-21 | 2019-12-17 | Schlumberger Technology Corporation | Reamer |
| US10519722B2 (en) | 2014-07-21 | 2019-12-31 | Schlumberger Technology Corporation | Reamer |
| US10584538B2 (en) | 2014-07-21 | 2020-03-10 | Schlumberger Technology Corporation | Reamer |
| CN104131785A (en) * | 2014-08-06 | 2014-11-05 | 四川万吉金刚石钻头有限公司 | Single-cone PDC concentric RWD drill bit |
| CN107842316A (en) * | 2017-06-24 | 2018-03-27 | 邓立宇 | A kind of speed-raising drill bit of shaft bottom local reduction |
| CN107842316B (en) * | 2017-06-24 | 2024-01-19 | 邓立宇 | Accelerating drill bit for partial decompression of well bottom |
| CN107859494A (en) * | 2017-11-30 | 2018-03-30 | 宜昌钻山甲科技有限责任公司 | A kind of transit joint and down-the-hole air hammer and drilling rod with spiral deslagging diverter function |
| CN107859494B (en) * | 2017-11-30 | 2023-10-20 | 宜昌钻山甲科技有限责任公司 | Transition joint with spiral slag discharging and flow dividing functions, down-the-hole impactor and drill rod |
| CN108746100B (en) * | 2018-06-22 | 2023-09-15 | 四川金易管业有限公司 | Pipeline inner glue removing mechanism |
| CN108746100A (en) * | 2018-06-22 | 2018-11-06 | 四川金易管业有限公司 | One kind is except gluing mechanism in pipeline |
| CN110242217A (en) * | 2019-06-10 | 2019-09-17 | 王文昭 | A kind of earth-boring bits |
| CN110905395A (en) * | 2019-12-31 | 2020-03-24 | 中国石油集团川庆钻探工程有限公司 | Well drilling speed-increasing system capable of changing bottom hole confining pressure distribution by middle energy gathering |
| CN110905395B (en) * | 2019-12-31 | 2024-04-30 | 中国石油集团川庆钻探工程有限公司 | Drilling acceleration system capable of changing well bottom confining pressure distribution through energy accumulation in middle |
| CN112196468A (en) * | 2020-10-15 | 2021-01-08 | 东北石油大学 | Hydraulic drive reaming while drilling tool |
| CN112096296A (en) * | 2020-11-12 | 2020-12-18 | 胜利油田固邦石油装备有限责任公司 | PDC drill bit for grinding fin type oil gas drilling |
| CN112096296B (en) * | 2020-11-12 | 2021-03-02 | 胜利油田固邦石油装备有限责任公司 | PDC drill bit for grinding fin type oil gas drilling |
| CN113404438A (en) * | 2021-07-28 | 2021-09-17 | 潍坊盛德石油机械制造有限公司 | Pressure-reducing and speed-increasing PDC diamond bit |
| CN113404438B (en) * | 2021-07-28 | 2022-04-26 | 潍坊盛德石油机械制造有限公司 | Pressure-reducing and speed-increasing PDC diamond bit |
| CN115492520A (en) * | 2022-11-17 | 2022-12-20 | 胜利油田万和石油工程技术有限责任公司 | Cutting rock-breaking mixed PDC drill bit |
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Application publication date: 20110608 |