CN202788615U - Static-orientation rotary-steering drilling tool - Google Patents
Static-orientation rotary-steering drilling tool Download PDFInfo
- Publication number
- CN202788615U CN202788615U CN 201220483716 CN201220483716U CN202788615U CN 202788615 U CN202788615 U CN 202788615U CN 201220483716 CN201220483716 CN 201220483716 CN 201220483716 U CN201220483716 U CN 201220483716U CN 202788615 U CN202788615 U CN 202788615U
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- mandrel
- gear
- urceolus
- servomotor
- bearing
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- 238000005553 drilling Methods 0.000 title claims abstract description 22
- 230000003068 static effect Effects 0.000 claims abstract description 9
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 230000001965 increasing effect Effects 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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Abstract
本实用新型公开了一种静态指向式旋转导向钻井工具，包括外筒，在外筒内设有从上至下依次连接的钻柱、中空万向联轴节和芯轴，钻柱转动连接在外筒内，在芯轴的上端部设有位于外筒内的偏置机构，在芯轴的下端部设有位于外筒内的关节轴承总成，在关节轴承总成的下方设有安装在外筒上的密封总成，在芯轴的下端固接有钻头。本实用新型通过采用少齿差偏心行星轮系实现芯轴的偏置，使该工具具有不受地质层影响的特点，因而能够获得稳定的造斜率，实现井眼轨迹的精确控制。不需要提钻就可以实现多种工作状态，达到增斜、降斜和稳斜的目的。能有效地改善了芯轴偏置时的受力状况，提高旋转导向工具的工作寿命。
The utility model discloses a static pointing rotary steerable drilling tool, which comprises an outer cylinder, in which a drill string, a hollow universal joint and a mandrel connected sequentially from top to bottom are arranged, and the drill string is rotatably connected to the outer cylinder. Inside, the upper end of the mandrel is provided with a biasing mechanism located in the outer cylinder, the lower end of the mandrel is provided with a joint bearing assembly located in the outer cylinder, and below the joint bearing assembly is installed on the outer cylinder. The sealing assembly is fixed with a drill bit at the lower end of the mandrel. The utility model realizes the offset of the mandrel by adopting the eccentric planetary gear train with less tooth difference, so that the tool has the characteristics that it is not affected by the geological layer, so it can obtain a stable build-up rate and realize the precise control of the wellbore trajectory. A variety of working states can be realized without lifting the drill to achieve the purpose of increasing, decreasing and stabilizing the inclination. It can effectively improve the force condition when the mandrel shaft is biased, and improve the working life of the rotary guiding tool.
Description
Technical field
The utility model patent relates to the drilling tool in the probing fields such as oil, natural gas, particularly about a kind of static guiding type rotary steering drilling tool.
Background technology
At present, to future developments such as ultradeep well, extended reach well and directional wells, traditional slidingtype drilling tool can not satisfy current drilling well demand to drilling technology, and the rotary steerable drilling technology is applied gradually as a kind of high-tech drilling technology and develops.
Rotary steerable tool in the market mainly contains the Power Drive of Schlumberger, Bake Hughes's Auto Track and Haliburton's Geo-Pilot etc.The above two belong to the pushing type rotary steering drilling tool, and the characteristics of these two kinds of drilling tools are to obtain at the drill bit place larger bias force.But because the difference of geological condition and the variation of drilling liquid pressure can affect the instrument build angle rate, cause well track not round and smooth, wellbore quality and borehole status are relatively poor, produce easily down-hole accident.
Haliburton's Geo-Pilot system belongs to guiding type rotary steering drilling tool, what its adopted that control drill stem buckling feature realizes drill axis effectively leads control, its advantage is that build angle rate is determined by instrument itself, be not subjected to the impact of formation drilling lithology, successful in soft formation and heterogeneity stratum, but fatigue failure occurs in the alternating stresses of mandrel bearing high strength, mandrel easily, affects life tools.
Summary of the invention
The utility model provides a kind of static guiding type rotary steering drilling tool for solving the technical problem that exists in the known technology, and this instrument is affected by geological stratification neither, can realize again the accurate control of well track, has again long working life simultaneously.
The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is: a kind of static guiding type rotary steering drilling tool, it is characterized in that, comprise urceolus, in urceolus, be provided with the drill string that connects successively from top to bottom, hollow universal coupling and mandrel, described drill string is rotatably connected in the urceolus, be provided with the biasing mechanism that is positioned at described urceolus in the upper end of described mandrel, be provided with the oscillating bearing assembly that is positioned at described urceolus in the bottom of described mandrel, below described oscillating bearing assembly, be provided with the seal assembly that is installed on the urceolus, be connected with drill bit in the lower end of described mandrel;
Described biasing mechanism comprises the servomotor I, be connected with the gear III on the output shaft of described servomotor I, described gear III is connected with interior eccentric gear, described interior eccentric gear is provided with and the external toothing of described gear III engagement and the ring gear that meshes with planetary gear, be provided with the small eccentricity hole at described planetary gear, described small eccentricity is equipped with plain radial bearing in the hole, and described plain radial bearing inner support has described mandrel; Described biasing mechanism also comprises the servomotor II, be connected with the gear IV on the output shaft of described servomotor II, be engaged with outer eccentric gear on the described gear IV, be provided with the large eccentricity hole at described outer eccentric gear, be provided with the described planetary gear that is rotationally connected with it in the described large eccentricity hole;
Described hollow universal coupling comprises upper yoke, connecting axle and the lower yoke that connects successively, and at the outer seal bellows that is arranged with of described connecting axle, described upper yoke is connected with the lower end of described drill string, and described lower yoke is connected with the upper end of described mandrel.
Described interior eccentric gear is connected in the interior eccentric urceolus by the bearing V, described outer eccentric gear is connected in the outer eccentric urceolus by the bearing VI, described interior eccentric urceolus and described outer eccentric urceolus are affixed, and be fixed in the described urceolus, described servomotor I and described servomotor II are fixed on the described interior eccentric urceolus.
Described oscillating bearing assembly comprises the self-aligning bearing that is installed on the described mandrel, and the two ends of described self-aligning bearing respectively are provided with a thrust bearing.
Advantage and the good effect that the utlity model has are:
1) by adopting few teeth difference eccentric planet train to realize the biasing of mandrel, makes this instrument have the advantages that not affected by geological stratification, thereby can obtain stable build angle rate, realize the accurate control of well track.
2) by adopting few teeth difference eccentric planet train to realize the biasing of mandrel, the combinations different with outer eccentric gear by interior eccentric gear obtain different build angle rates, in application process, do not need like this to carry to bore and just can realize multiple duty, reach the purpose of increasing hole angle, drop angle and hold angle.
3) by adopting the hollow star coupling to realize being connected of drill string and mandrel, effectively improved the force-bearing situation when mandrel is setovered, thereby can improve the working life of rotary steerable tool.
Description of drawings
Fig. 1 is principle schematic of the present utility model;
Fig. 2 is the structural representation of the utility model epimere section;
Fig. 3 is the structural representation of the utility model hypomere section;
Fig. 4 is the A-A sectional view of the utility model Fig. 3 when being in very big bias state;
Fig. 5 is the A-A sectional view of the utility model Fig. 3 when being in minimum bias state.
The specific embodiment
For further understanding summary of the invention of the present utility model, Characteristic, hereby exemplify following examples, and cooperate accompanying drawing to be described in detail as follows:
See also Fig. 1 ~ Fig. 6, a kind of static guiding type rotary steering drilling tool comprises urceolus 20, in urceolus 20, be provided with the drill string 1, hollow universal coupling 2 and the mandrel 3 that connect successively from top to bottom, described drill string 1 is rotatably connected in the urceolus 20, be provided with the biasing mechanism that is positioned at described urceolus 20 in the upper end of described mandrel 3, be provided with the oscillating bearing assembly 14 that is positioned at described urceolus 20 in the bottom of described mandrel 3, being provided with the seal assembly 19 that is installed on the urceolus 20 below the described oscillating bearing assembly 14, be connected with drill bit 4 in the lower end of described mandrel 3;
Described biasing mechanism comprises servomotor I 21, be connected with gear III I23 on the output shaft of described servomotor I 21, described gear III 23 is connected with interior eccentric gear 5, described interior eccentric gear 5 is provided with and the external toothing 6 of described gear III 23 engagements and the ring gear 7 that meshes with planetary gear 8, be provided with small eccentricity hole 12 at described planetary gear 8, in the described small eccentricity hole 12 plain radial bearing 13 is installed, described plain radial bearing 13 inner supports have described mandrel 3; Described biasing mechanism also comprises servomotor II 22, be connected with gear IV 24 on the output shaft of described servomotor II 22, be engaged with outer eccentric gear 9 on the described gear IV 24, be provided with large eccentricity hole 10 at described outer eccentric gear 9, be provided with the described planetary gear 8 that is rotationally connected with it by bearing VII 27 in the described large eccentricity hole 10.
Described hollow universal coupling 2 comprises upper yoke 2-1, connecting axle 2-3 and the lower yoke 2-5 that connects successively, the outer seal bellows 2-6 that is arranged with at described connecting axle 2-3, described upper yoke 2-1 is connected with cross axle 2-2 in the connecting axle 2-3 employing, described connecting axle 2-3 is connected by lower cross axle 2-4 with lower yoke 2-5, described upper yoke 2-1 is connected with the lower end of described drill string 1, and described lower yoke 2-5 is connected with the upper end of described mandrel 3.
Described interior eccentric gear 5 is connected in the interior eccentric urceolus 17 by bearing V 25, described outer eccentric gear 9 is connected in the outer eccentric urceolus 18 by bearing VI 26, described interior eccentric urceolus 17 and described outer eccentric urceolus 18 are affixed, and be fixed in the described urceolus 20, described servomotor I 21 and described servomotor II 22 are fixed on the described interior eccentric urceolus 17.
Described oscillating bearing assembly 14 comprises the self-aligning bearing 14-1 that is installed on the described mandrel 3, and the two ends of described self-aligning bearing 14-1 respectively are provided with a thrust bearing 14-2,14-3.
Operating principle of the present utility model:
The moment of torsion that drill string 1 rotation produces acts on the cutting that drill bit 4 is realized the rock stratum by hollow universal coupling 2 and mandrel 3, drilling fluid is delivered to the shaft bottom by mandrel 3, the drill bit 4 of drill string 1, hollow universal coupling 2 and the hollow of hollow, and hollow universal coupling 2 is realized sealing by the bellows 2-6 that is welded on its external surface.The oscillating bearing assembly 14 that self-aligning bearing 14-1, up-thrust bearing 14-2 and lower thrust-bearing 14-3 form is the rotating fulcrum of mandrel 3.
Do not have in servomotor II 22 in the situation of output, rotate with outer eccentric gear 9 nothings of gear IV 24 engagements.At this moment, it is relatively fixing to be installed in the planetary gear rotation center line 11 of the planetary gear 8 in the outer eccentric gear 9 large eccentricity holes.Servomotor I 21 provides power by gear III 23 for whole biasing mechanism.Gear III 23 by with the external toothing 6 of the interior eccentric gear 5 of its engagement, the ring gear 7 of eccentric gear 5 rotates in driving, planetary gear 8 rotates under the ring gear 7 with its engagement drives, thereby has formed the rotation of planetary gear 8.By plain radial bearing 13, the mandrel 3 that is installed in the planetary gear 8 small eccentricity holes 12 will move with planet gear 8, and rotate around oscillating bearing assembly 14, and externally eccentric gear rotary centerline 15 produces certain drift angle mutually, thereby realizes the biasing of drill bit 4.
Do not have in servomotor I 21 in the situation of output, rotate with interior eccentric gear 5 nothings of gear III 23 engagements, at this moment, external toothing 6 is fixed with ring gear 7 relative urceolus 20, and servomotor II 22 provides power by gear IV 24 for whole biasing mechanism.Gear IV 24 drives outer eccentric gear 9 rotations with its engagement, thereby drives the planetary gears 8 and ring gear 7 engagement rotations that are installed in the outer eccentric gear 9, makes planetary gear 8 produce revolution.The mandrel 3 that is installed in the planetary gear 8 small eccentricity holes 12 by plain radial bearing 13 also will move with planet gear 8, and rotate around oscillating bearing assembly 14, and externally eccentric gear rotary centerline 15 produces certain drift angle mutually, thereby realizes the biasing of drill bit 4.
In the situation that servomotor I 21 and servomotor II 22 are exported simultaneously, planetary gear 8 both can rotation, can revolve round the sun again, thereby more effectively realize the biasing of drill bit 4.In the situation that externally center displacement of the relative planetary gear rotation center line 11 with the small eccentricity hole of center displacement of eccentric gear rotary centerline 15 equates mutually of large eccentricity hole 10, can realize very big bias state shown in Figure 4 and minimum bias state shown in Figure 5 by the control to servomotor I 21 and servomotor II 22, namely amount of bias is zero.
Although the above is described preferred embodiment of the present utility model by reference to the accompanying drawings; but the utility model is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; not breaking away from the scope situation that the utility model aim and claim protect, can also make a lot of forms, these all belong within the protection domain of the present utility model.
Claims (3)
1. static guiding type rotary steering drilling tool, it is characterized in that, comprise urceolus, in urceolus, be provided with the drill string, hollow universal coupling and the mandrel that connect successively from top to bottom, described drill string is rotatably connected in the urceolus, be provided with the biasing mechanism that is positioned at described urceolus in the upper end of described mandrel, be provided with the oscillating bearing assembly that is positioned at described urceolus in the bottom of described mandrel, below described oscillating bearing assembly, be provided with the seal assembly that is installed on the urceolus, be connected with drill bit in the lower end of described mandrel;
Described biasing mechanism comprises the servomotor I, be connected with the gear III on the output shaft of described servomotor I, described gear III is connected with interior eccentric gear, described interior eccentric gear is provided with and the external toothing of described gear III engagement and the ring gear that meshes with planetary gear, be provided with the small eccentricity hole at described planetary gear, described small eccentricity is equipped with plain radial bearing in the hole, and described plain radial bearing inner support has described mandrel; Described biasing mechanism also comprises the servomotor II, be connected with the gear IV on the output shaft of described servomotor II, be engaged with outer eccentric gear on the described gear IV, be provided with the large eccentricity hole at described outer eccentric gear, be provided with the described planetary gear that is rotationally connected with it in the described large eccentricity hole;
Described hollow universal coupling comprises upper yoke, connecting axle and the lower yoke that connects successively, and at the outer seal bellows that is arranged with of described connecting axle, described upper yoke is connected with the lower end of described drill string, and described lower yoke is connected with the upper end of described mandrel.
2. static guiding type rotary steering drilling tool according to claim 1, it is characterized in that, described interior eccentric gear is connected in the interior eccentric urceolus by the bearing V, described outer eccentric gear is connected in the outer eccentric urceolus by the bearing VI, described interior eccentric urceolus and described outer eccentric urceolus are affixed, and be fixed in the described urceolus, described servomotor I and described servomotor II are fixed on the described interior eccentric urceolus.
3. static guiding type rotary steering drilling tool according to claim 1 is characterized in that, described oscillating bearing assembly comprises the self-aligning bearing that is installed on the described mandrel, and the two ends of described self-aligning bearing respectively are provided with a thrust bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220483716 CN202788615U (en) | 2012-09-20 | 2012-09-20 | Static-orientation rotary-steering drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220483716 CN202788615U (en) | 2012-09-20 | 2012-09-20 | Static-orientation rotary-steering drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202788615U true CN202788615U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220483716 Expired - Lifetime CN202788615U (en) | 2012-09-20 | 2012-09-20 | Static-orientation rotary-steering drilling tool |
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| CN (1) | CN202788615U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900364A (en) * | 2012-09-20 | 2013-01-30 | 天津大学 | Static pointing type rotary guiding drilling tool |
| CN103310038A (en) * | 2013-05-22 | 2013-09-18 | 天津大学 | Virtual machine actual electricity simulation system and method for rotary guiding executing mechanism |
| CN107701107A (en) * | 2017-10-31 | 2018-02-16 | 中国科学院地质与地球物理研究所 | The high build angle rate rotary steerable tool of backup radial type and control method in a kind of static state |
| CN108581840A (en) * | 2018-06-19 | 2018-09-28 | 天津大学 | A kind of swing aligning structure for arc track feeding |
| CN108661558A (en) * | 2018-06-26 | 2018-10-16 | 徐芝香 | Dynamic can inclined rotary steerable tool |
| CN108868586A (en) * | 2018-08-21 | 2018-11-23 | 曾卫林 | Blade-free mud motor |
| CN112227952A (en) * | 2020-10-31 | 2021-01-15 | 河南城建学院 | Trenchless directional drill bit |
-
2012
- 2012-09-20 CN CN 201220483716 patent/CN202788615U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900364A (en) * | 2012-09-20 | 2013-01-30 | 天津大学 | Static pointing type rotary guiding drilling tool |
| CN102900364B (en) * | 2012-09-20 | 2014-10-15 | 天津大学 | Static pointing type rotary guiding drilling tool |
| CN103310038A (en) * | 2013-05-22 | 2013-09-18 | 天津大学 | Virtual machine actual electricity simulation system and method for rotary guiding executing mechanism |
| CN107701107A (en) * | 2017-10-31 | 2018-02-16 | 中国科学院地质与地球物理研究所 | The high build angle rate rotary steerable tool of backup radial type and control method in a kind of static state |
| CN108581840A (en) * | 2018-06-19 | 2018-09-28 | 天津大学 | A kind of swing aligning structure for arc track feeding |
| CN108581840B (en) * | 2018-06-19 | 2023-10-20 | 天津大学 | Swing aligning structure for feeding circular arc track |
| CN108661558A (en) * | 2018-06-26 | 2018-10-16 | 徐芝香 | Dynamic can inclined rotary steerable tool |
| CN108868586A (en) * | 2018-08-21 | 2018-11-23 | 曾卫林 | Blade-free mud motor |
| CN108868586B (en) * | 2018-08-21 | 2024-02-09 | 曾卫林 | Blade-free underground power drilling tool |
| CN112227952A (en) * | 2020-10-31 | 2021-01-15 | 河南城建学院 | Trenchless directional drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130313 Effective date of abandoning: 20141015 |
|
| RGAV | Abandon patent right to avoid regrant |