CN105134083A - Bearing spiral combined sealing structure of high-speed roller bit - Google Patents
Bearing spiral combined sealing structure of high-speed roller bit Download PDFInfo
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- CN105134083A CN105134083A CN201510613467.8A CN201510613467A CN105134083A CN 105134083 A CN105134083 A CN 105134083A CN 201510613467 A CN201510613467 A CN 201510613467A CN 105134083 A CN105134083 A CN 105134083A
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Abstract
The invention relates to a bearing spiral combined sealing structure of a high-speed roller bit. The bearing spiral combined sealing structure comprises a roller cone, a bearing, a spiral seal ring and an O-shaped rubber ring. The spiral seal ring is installed in a spiral groove of a roller cone inner hole. When the bit rotates at a high speed, through the pumping effect of the spiral groove, a function of automatically draining sand is achieved. The pressure of the outer side of the O-shaped rubber ring is added, the pressure difference of the two sides of the O-shaped rubber ring is reduced, and the sealing effect of the O-shaped rubber ring is improved. The O-shaped rubber ring is located above the spiral seal ring and installed in a bearing groove with a certain interference. When the bit rotates at a high speed, the auxiliary two-stage sealing is achieved, and the bit can also achieve the effective sealing effect when stopping rotating. The bearing spiral combined sealing structure has good sand draining performance, the abrasion to the bearing can be effectively reduced, the sealing requirements under different working conditions can be met, the sealing reliability and stability are greatly improved, the sealing service life is prolonged. Other supporting elements are not needed for the sealing, and precious time is saved for the roller bit.
Description
Technical field
The present invention relates to a kind of high speed rock bit bearing spiral combination sealing being applicable to oil drilling, geological drilling, belong to cone bit bearing field of sealing technology.
Background technology
High speed is the new direction of rock bit development, and long-life high speed rock bit research has become world oil drilling engineering important technical problem in the urgent need to address.Bearing seal determines the key in high speed rock bit life-span, is the weakest link of high speed rock bit.The failure analysis of rock bit is shown, as long as a gear wheel bearing damages in advance in rock bit, whole drill bit will be made to lose efficacy very soon.Field data statistical analysis shows, the drill bit lost efficacy is caused to account for 80% of inefficacy drill bit sum because bearing damages in advance, and the life-span of bearing relies on the life-span of sealing to a great extent, because sealing was lost efficacy in advance, the bearing of heavy wear accounted for 30% of failing bearings sum.
Domestic and international Research on Seal is mainly for conventional roller cone drill bit, also little to the research of high speed rock bit sealing.Hughes Electronics of the U.S. leads rock bit Sealing Technology always, and domestic research level obviously lags behind abroad.At present, existing sealing is the mode of passive seal mostly, and do not have initiatively sand discharge function, improve sealing performance by passive entering of prevention mud abrasive particle, once mud particle enters, the wearing and tearing caused just cannot make up the infringement of sealing performance.Passive seal mode is changed into initiatively sediment outflow mode by this project, and design helical structure can directly stop entering of mud, and be suitable for high speed rock bit, compared to passive seal mode, the reliability of sealing will improve greatly.
" spiral combination sealing " adopts the new structure form of spiral sealing ring and O type rubber ring organic assembling.When drilling bit high-speed rotates, helixseal plays sediment outflow, primary seal effect, and significantly can overcome the wearing and tearing that solid particle causes, auxiliary rubber circle realizes two-stage sealing, and reliability is high.When rock bit stops operating, adopt the seal with elastometic washer of O type.Meanwhile, spiral combination sealing has distortion automatic compensation function.
Summary of the invention
The object of the invention is the sediment outflow poor performance, serious wear, the problem that reliability is low that exist to solve existing high speed rock bit bearing seal structure, spy provides a kind of high speed rock bit bearing spiral combination sealing.
The technical solution adopted for the present invention to solve the technical problems is: a kind of high speed rock bit bearing of the present invention spiral combined sealing structure, is formed primarily of gear wheel, bearing, spiral sealing ring and O type rubber ring, is positioned at the annular seal space that gear wheel and bearing form.Described spiral sealing ring is installed in the helicla flute of gear wheel endoporus, when drilling bit high-speed rotary, by spiral fluted pump action, realize automatic sand draining function, effectively prevent mud particle from entering in bearing and cause wearing and tearing, add O type rubber ring outside pressure simultaneously, reduce O type rubber ring both sides pressure reduction, improve the sealing effectiveness of O type rubber ring; Described O type rubber ring is positioned at above spiral sealing ring, be arranged in bearing groove with certain magnitude of interference, auxiliary two-stage sealing effect is played when drilling bit high-speed rotary, the seal with elastometic washer of O type can be adopted when drill bit stops operating, be suitable for seal request during rock bit difference operating mode, improve the reliability of sealing.
Advantage of the present invention: 1, novel sealing has pumping sediment outflow feature, significantly can overcome the wearing and tearing that mud particle causes; 2, adopt helical structure to increase the outside pressure of O type rubber ring, reduce inside and outside differential pressure, make the reduction of the decrement of O type rubber ring, minimizing of being heated, improve its sealing performance; 3, spiral combination sealing not only can realize sealing when drilling bit high-speed rotates, and can also solve sealing problem when rock bit stops operating, reliability is higher; 4, spiral combination sealing has distortion automatic compensation function, makes sealing surface remain good contact; 5, spiral combination sealing is placed in gear wheel groove and bearing helicla flute, does not need to increase other elements and supports, take up room little, for rock bit saves valuable space.
Accompanying drawing explanation
Fig. 1 is a kind of high speed rock bit bearing of the present invention spiral combined sealing structure figure.
Fig. 2 is the enlarged drawing of Figure 1A place hermetically-sealed construction.
In figure: 1. tooth pawl; 2. gear wheel; 3. steel ball; 4. plug pin; 5. bearing; 6. spiral sealing ring; 7.O type rubber ring
Detailed description of the invention:
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, a kind of high speed rock bit bearing spiral combined sealing structure, is made up of gear wheel (2), bearing (5), spiral sealing ring (6) and O type rubber ring (7).Spiral combined sealing structure is arranged in the annular seal space between bearing (5) and gear wheel (2).
As shown in Figure 2, described gear wheel (2) endoporus is processed with helicla flute, for installing spiral sealing ring (6); Described O type rubber ring (7) is arranged in the groove of bearing (5) by interference fit, makes its lock ring on bearing, is positioned at above spiral sealing ring (6).
Coordinate with reference to Fig. 1, during the application of this sealing scene, tooth pawl (1) and gear wheel (2) are connected on bearing (5) respectively by gear wheel inner hole sleeve, after steel ball (3) puts into bearing from plug pin hole, plug pin (4) is welded and fixed, by steel ball (3), gear wheel (2) is remained on bearing (5).Between gear wheel (2) and bearing (5), spiral combination sealing is installed.Spiral sealing ring (6) is arranged in gear wheel (2), can rotate during work with drill bit, by spiral pump effect, is discharged outside annular seal space by the mud particle of bit exterior, prevents from mud particle from entering causing the wearing and tearing of bearing; O type rubber ring (7) when drilling bit high-speed rotates as auxiliary two-stage sealing, also effective sealing effect can be played when drill bit stops operating, after spiral sealing ring (6) lost efficacy, O type rubber ring (7) also can realize wiping seal, lubricating grease in bearing bore can also be effectively stoped to leak, to ensure the good lubrication of bearing.
Structure of the present invention has good sediment outflow performance, effectively can reduce the wearing and tearing of bearing, this structure is not only suitable for sealing during drilling bit high-speed rotary, also be applicable to drill bit static time sealing, seal request during different operating mode can be met, substantially increase reliability and the stability of sealing, ensure that the application life of seal.Spiral combination sealing does not need to increase other support components, takes up room little, for rock bit saves valuable space.
Claims (1)
1. a high speed rock bit bearing spiral combined sealing structure, comprise gear wheel (2), bearing (5), spiral sealing ring (6) and O type rubber ring (7), this spiral combined sealing structure is positioned at the annular seal space that gear wheel (2) forms with bearing (5).Described spiral sealing ring (6) is installed in the helicla flute of gear wheel (2) endoporus, when drilling bit high-speed rotary, by spiral fluted pump action, realize automatic sand draining function, effectively prevent mud particle from entering in bearing and cause wearing and tearing, add O type rubber ring (7) outside pressure simultaneously, reduce O type rubber ring (7) both sides pressure reduction, improve the sealing effectiveness of O type rubber ring (7); Described O type rubber ring (7) is positioned at above spiral sealing ring (6), auxiliary two-stage sealing effect is played when drilling bit high-speed rotary, O type seal with elastometic washer (7) can be adopted when drill bit stops operating, improve the reliability of sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510613467.8A CN105134083B (en) | 2015-09-24 | 2015-09-24 | A kind of high speed rock bit bearing spiral combined sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510613467.8A CN105134083B (en) | 2015-09-24 | 2015-09-24 | A kind of high speed rock bit bearing spiral combined sealing structure |
Publications (2)
| Publication Number | Publication Date |
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| CN105134083A true CN105134083A (en) | 2015-12-09 |
| CN105134083B CN105134083B (en) | 2017-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510613467.8A Active CN105134083B (en) | 2015-09-24 | 2015-09-24 | A kind of high speed rock bit bearing spiral combined sealing structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545209A (en) * | 2016-01-08 | 2016-05-04 | 西南石油大学 | Double-row swallow-tail sealing structure of roller bit |
| CN106989915A (en) * | 2017-05-31 | 2017-07-28 | 西南石油大学 | A kind of rectilinear high speed rock bit bearing helixseal experimental rig |
| CN106989874A (en) * | 2017-05-31 | 2017-07-28 | 西南石油大学 | A kind of horizontal high speed rock bit bearing helixseal experimental rig |
| CN107036799A (en) * | 2017-05-31 | 2017-08-11 | 西南石油大学 | A kind of method of testing of rock bit helixseal sediment outflow performance |
| CN107091736A (en) * | 2017-05-31 | 2017-08-25 | 西南石油大学 | A kind of method of testing of rock bit helixseal sediment outflow performance |
Citations (4)
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| CN2259868Y (en) * | 1995-07-31 | 1997-08-20 | 江汉石油管理局钻头厂 | Teethed wheel type tooth drill bit |
| CN201080787Y (en) * | 2007-08-22 | 2008-07-02 | 四川石油管理局成都总机械厂 | Rolling sealing three teeth roller bit |
| CN102287139A (en) * | 2010-06-18 | 2011-12-21 | 北京石油化工学院 | Cone bit metal floating-sealing device |
| CN202745698U (en) * | 2012-03-30 | 2013-02-20 | 幸发芬 | Bearing dual-sealing system of roller bit |
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2015
- 2015-09-24 CN CN201510613467.8A patent/CN105134083B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2259868Y (en) * | 1995-07-31 | 1997-08-20 | 江汉石油管理局钻头厂 | Teethed wheel type tooth drill bit |
| CN201080787Y (en) * | 2007-08-22 | 2008-07-02 | 四川石油管理局成都总机械厂 | Rolling sealing three teeth roller bit |
| CN102287139A (en) * | 2010-06-18 | 2011-12-21 | 北京石油化工学院 | Cone bit metal floating-sealing device |
| CN202745698U (en) * | 2012-03-30 | 2013-02-20 | 幸发芬 | Bearing dual-sealing system of roller bit |
Non-Patent Citations (1)
| Title |
|---|
| 陈家庆等: "牙轮钻头流体动压密封的结构构想和参数确定", 《石油矿场机械》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545209A (en) * | 2016-01-08 | 2016-05-04 | 西南石油大学 | Double-row swallow-tail sealing structure of roller bit |
| CN106989915A (en) * | 2017-05-31 | 2017-07-28 | 西南石油大学 | A kind of rectilinear high speed rock bit bearing helixseal experimental rig |
| CN106989874A (en) * | 2017-05-31 | 2017-07-28 | 西南石油大学 | A kind of horizontal high speed rock bit bearing helixseal experimental rig |
| CN107036799A (en) * | 2017-05-31 | 2017-08-11 | 西南石油大学 | A kind of method of testing of rock bit helixseal sediment outflow performance |
| CN107091736A (en) * | 2017-05-31 | 2017-08-25 | 西南石油大学 | A kind of method of testing of rock bit helixseal sediment outflow performance |
| US10429274B2 (en) | 2017-05-31 | 2019-10-01 | Southwest Petrolem Univeristy | Vertical high speed testing device for spiral seal of cone bit bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105134083B (en) | 2017-07-28 |
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