CN101586440A - Oriented rotational guide drilling tool - Google Patents
Oriented rotational guide drilling tool Download PDFInfo
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- CN101586440A CN101586440A CNA200910083942XA CN200910083942A CN101586440A CN 101586440 A CN101586440 A CN 101586440A CN A200910083942X A CNA200910083942X A CN A200910083942XA CN 200910083942 A CN200910083942 A CN 200910083942A CN 101586440 A CN101586440 A CN 101586440A
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Abstract
The present invention relates to an oriented rotational guide drilling tool which comprises a hollow housing with two through ends. The housing is communicated with a hollow drill collar through an upper female buckle. The lower end of the housing is inserted with a hollow mandrel. The cup-shaped port on the upper end of the hollow mandrel clings to the inner wall of the housing. The upper outer wall of the mandrel which clings to the cup-shaped port is sequentially sleeved and fixed with an upper floating sealing assembly and an upper floating bearing for supporting the mandrel from up to bottom. The mandrel penetrates an eccentric mechanism which is installed and fixed on the inner wall of the housing. The lower end of the mandrel extends out from the housing and is sequentially connected with a hollow rotating head and a drill. The outer wall which is in the lower chamber of the casing and clings to the mandrel is sequentially sleeved with a lower sealing assembly and a lower fixing bearing from up to bottom. The lower sealing assembly and the lower fixing bearing are fixedly connected with the inner wall and the mandrel of the housing. The oriented rotational guide drilling tool of the invention not only has high control precision, but also has a simple structure and therefore can be widely applied for various strata with different mechanic characteristics of surface.
Description
Technical field
The present invention relates to a kind of drilling tool, particularly about a kind of sensing formula rotary steering driller well tool.
Background technology
Controlling Borehole Trajectory is meant well is led, and well gradient and orientation are operated according to the gradient and the orientation of pre-design, reaches the target that designs in advance.At present existing Chinese patent, application number is that 200720021462.7 " sliding push-the-bit type steering drilling tool " realized the control to well track, but this drilling tool complex structure, control accuracy is not high, the more important thing is that this drilling tool relies on the mellowness on stratum equally.Other traditional rotary steering drilling tool also mainly relies on the mechanics of surface characteristic on stratum, and this has greatly limited the possibility of Controlling Borehole Trajectory.
Summary of the invention
At the problems referred to above, the purpose of this invention is to provide a kind of mechanics of surface characteristic that does not rely on the stratum, simple in structure, and sensing formula rotary steering driller well tool that can the accurate and effective Controlling Borehole Trajectory.
For achieving the above object, the present invention takes following technical scheme: it comprises the hollow shell that two ends are penetrating, and described shell is connected with a hollow drill collar by the box of its upper end; Described shell is inserted with a hollow core shaft in the lower end, the cup-shaped port on described mandrel top is close on the described outer casing inner wall, on the mandrel external wall of upper portion of adjacent described cup-shaped port from top to bottom successively ring set be fixed with the last floating bearing that floating seal assembly and a support mandrel are used on; Described mandrel runs through an eccentric stiffener that is fixed on the described outer casing inner wall; Stretch out outside the described shell described mandrel lower end, is connected with a drill bit with a hollow rotating head successively; On the outer wall of described shell lower end cavity inner close fitting mandrel from the bottom to top successively ring set once seal assembly and once rigid bearing are arranged, described lower seal assembly and following rigid bearing are all fixedlyed connected on the inwall of described shell.
Described eccentric stiffener is positioned at the midpoint of described mandrel.
The present invention is owing to take above technical scheme, it has the following advantages: 1, owing to the present invention includes floating bearing on, and last floating bearing ring set is fixed on the external wall of upper portion of mandrel, the lower end of mandrel connects a drill bit, when eccentric stiffener press-bending mandrel produces radial displacement, last floating bearing along with the motion of mandrel along the mandrel axially-movable, drill bit is along with the bending of mandrel produces the side direction inclination angle, therefore the present invention can pass through the radial displacement size of control mandrel generation or go up the axial displacement size of floating bearing along the mandrel generation, control the side direction inclination angle that drill bit produces accurately and effectively, indirect Controlling Borehole Trajectory, and do not need to rely on the mechanics of surface characteristic on stratum.2, because mandrel upper port of the present invention is designed to the cup-shaped mouth, cup-shaped mouth and last floating seal assembly have constituted effective radial seal, guaranteed that the mud in the drilling process can not come out from the cup-shaped mouth is excessive, and on the outer wall of shell lower end cavity inner close fitting mandrel also ring set seal assembly is once arranged, therefore the cavity with outer casing inner wall and the formation of mandrel outer wall seals up, prevented entering of mud, and then avoided the damage of mud, prolonged the application life of eccentric stiffener eccentric stiffener.3, the present invention can make mandrel produce bigger amount of deflection because biasing mechanism is arranged on the midpoint of mandrel, therefore Controlling Borehole Trajectory more effectively.The present invention is the control accuracy height not only, and simple in structure, can be widely used in the stratum of various different surfaces mechanical characteristics.
Description of drawings
Fig. 1 is a structural representation of the present invention
The specific embodiment
Below in conjunction with embodiment, the present invention is described in detail.
As shown in Figure 1, the present invention includes the penetrating hollow shell in two ends 1, shell 1 is connected with a hollow drill collar 2 by the box (not shown) of its upper end.Be inserted with a hollow core shaft 3 in the shell 1, the upper port of mandrel 3 is provided with a cup-shaped mouth 31 of being close to outer casing inner wall.On mandrel 3 outer walls of adjacent cup-shaped mouth 31 from top to bottom successively ring set be fixed with the last floating bearing 5 of floating seal assembly 4 and a support mandrel 3 usefulness on, so not only can make the mandrel 3 in the drilling process not bear the axial weight on bit effect, can also make mandrel 3 have the degree of freedom of rotation status, and kinetic force of friction reach minimum in rotary course.Because cup-shaped mouth 31 is close to shell 1 inwall, therefore when cup-shaped mouth 31 when the inwall of shell 1 slides up and down, last floating seal assembly 4 and last floating bearing 5 slide with the slip of cup-shaped mouth 31, and cup-shaped mouth 31 has constituted effective radial seal with last floating seal assembly 4.The midpoint of mandrel 3 is provided with a biasing mechanism 6, and biasing mechanism 6 is fixed on the inwall of shell 1, makes 6 pairs of mandrels 3 of biasing mechanism do the time spent like this, and the amount of deflection maximum that mandrel 3 produces is convenient to more effectively Controlling Borehole Trajectory.On mandrel 3 outer walls in the shell 1 lower end cavity from the bottom to top successively ring set once seal assembly 7 and once rigid bearing 8 are arranged, lower seal assembly 7 all is fixed on the inwall of shell 1 with following rigid bearing 8, mandrel 3 still keeps a rotary freedom like this.Last floating seal assembly 5 and lower seal assembly 7 make and have prevented the cavity sealing that shell 1 inwall and mandrel 3 outer walls form entering of mud, and then avoided the damage of mud to biasing mechanism 6.Stretch out outside the shell 1 lower end of mandrel 3, and be connected with a drill bit 10 successively with hollow rotating head 9, and swivel head 9 and drill bit 10 are all coaxial with drill collar 2.
When adopting drilling tool of the present invention to construct, by the radial displacement of direct control eccentric stiffener 4, the distance that floating bearing 5 slides up and down is gone up in control indirectly.That is to say that when mandrel 3 was biased mechanism's 6 press-bendings, the distance that shorten mandrel 3 upper ends was the distance that floating bearing 5 glides along mandrel 3; When biasing mechanism 6 does not apply time spent of doing of power, mandrel 3 becomes straight by curved, and the distance of mandrel 3 upper ends elongation is floating bearing 5 along the distance of sliding on the mandrel 3.Meanwhile, drill bit 10 finally reaches the purpose of Controlling Borehole Trajectory along with the bending change of mandrel 3 produces different side direction inclination angles.
In the various embodiments described above, the structure of each parts, the position is set and connects and all can change to some extent, on the basis of technical solution of the present invention,, should not get rid of outside protection scope of the present invention improvement and the equivalents that individual component is carried out.
Claims (2)
1, a kind of guiding type rotary steering drilling tool is characterized in that: it comprises the hollow shell that two ends are penetrating, and described shell is connected with a hollow drill collar by the box of its upper end; Described shell is inserted with a hollow core shaft in the lower end, the cup-shaped port on described mandrel top is close on the described outer casing inner wall, on the mandrel external wall of upper portion of adjacent described cup-shaped port from top to bottom successively ring set be fixed with the last floating bearing that floating seal assembly and a support mandrel are used on; Described mandrel runs through an eccentric stiffener that is fixed on the described outer casing inner wall; Stretch out outside the described shell described mandrel lower end, is connected with a drill bit with a hollow rotating head successively; On the outer wall of described shell lower end cavity inner close fitting mandrel from the bottom to top successively ring set once seal assembly and once rigid bearing are arranged, described lower seal assembly and following rigid bearing are all fixedlyed connected on the inwall of described shell.
2, a kind of guiding type rotary steering drilling tool as claimed in claim 1, it is characterized in that: described eccentric stiffener is positioned at the midpoint of described mandrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910083942A CN101586440B (en) | 2009-05-11 | 2009-05-11 | Oriented rotational guide drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910083942A CN101586440B (en) | 2009-05-11 | 2009-05-11 | Oriented rotational guide drilling tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101586440A true CN101586440A (en) | 2009-11-25 |
| CN101586440B CN101586440B (en) | 2012-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910083942A Active CN101586440B (en) | 2009-05-11 | 2009-05-11 | Oriented rotational guide drilling tool |
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| CN (1) | CN101586440B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162336A (en) * | 2011-03-01 | 2011-08-24 | 中国海洋石油总公司 | Locating device for rotary steering drilling tool of motor pump |
| CN102865038A (en) * | 2012-08-13 | 2013-01-09 | 中国石油大学(华东) | Offset guide mechanism design method of dynamic directional type rotary steering well drilling tool |
| CN102865039A (en) * | 2012-10-19 | 2013-01-09 | 中国石油大学(华东) | Structure bending corner locking mechanism for rotating guide drilling tool |
| CN102913131A (en) * | 2012-08-14 | 2013-02-06 | 中国石油大学(华东) | Dynamic point-the-bit rotary steering drilling tool |
| CN104120974A (en) * | 2014-07-22 | 2014-10-29 | 中国地质大学（武汉） | Swing type rotary steering well drilling rig |
| CN104775803A (en) * | 2012-10-19 | 2015-07-15 | 中国石油大学(华东) | Method for controlling well track following and stability of dynamic point-bit rotary steering drilling tool |
| US9587440B2 (en) | 2015-03-25 | 2017-03-07 | China University Of Petroleum | Dynamic point-the-bit rotary steerable drilling tool and measuring method thereof |
| CN108286413A (en) * | 2017-12-27 | 2018-07-17 | 中国石油集团长城钻探工程有限公司 | A kind of drilling guidance tool and well system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2849115Y (en) * | 2005-12-28 | 2006-12-20 | 新疆石油管理局钻井工艺研究院 | Rotary guiding well drilling tool |
| CN101059061B (en) * | 2007-04-26 | 2012-10-03 | 倪红坚 | Sliding push-the-bit type steering drilling tool |
| CN201460731U (en) * | 2009-05-11 | 2010-05-12 | 中国海洋石油总公司 | Directional rotary steering drilling tool |
-
2009
- 2009-05-11 CN CN200910083942A patent/CN101586440B/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162336B (en) * | 2011-03-01 | 2013-12-18 | 中国海洋石油总公司 | Locating device for rotary steering drilling tool of motor pump |
| CN102162336A (en) * | 2011-03-01 | 2011-08-24 | 中国海洋石油总公司 | Locating device for rotary steering drilling tool of motor pump |
| CN102865038A (en) * | 2012-08-13 | 2013-01-09 | 中国石油大学(华东) | Offset guide mechanism design method of dynamic directional type rotary steering well drilling tool |
| CN102865038B (en) * | 2012-08-13 | 2016-08-03 | 中国石油大学(华东) | A kind of offset guide mechanism of dynamic guiding type rotary steering drilling tool |
| CN102913131B (en) * | 2012-08-14 | 2016-08-10 | 中国石油大学(华东) | A kind of dynamically guiding type rotary steering drilling tool |
| CN102913131A (en) * | 2012-08-14 | 2013-02-06 | 中国石油大学(华东) | Dynamic point-the-bit rotary steering drilling tool |
| CN104775803A (en) * | 2012-10-19 | 2015-07-15 | 中国石油大学(华东) | Method for controlling well track following and stability of dynamic point-bit rotary steering drilling tool |
| CN102865039B (en) * | 2012-10-19 | 2015-10-28 | 中国石油大学(华东) | For the structure bent angle retaining mechanism of rotary steering drilling tool |
| CN102865039A (en) * | 2012-10-19 | 2013-01-09 | 中国石油大学(华东) | Structure bending corner locking mechanism for rotating guide drilling tool |
| CN104775803B (en) * | 2012-10-19 | 2017-07-14 | 中国石油大学(华东) | A kind of well track to dynamic guiding type rotary steering drilling tool is servo-actuated and stable control method |
| CN104120974A (en) * | 2014-07-22 | 2014-10-29 | 中国地质大学（武汉） | Swing type rotary steering well drilling rig |
| US9587440B2 (en) | 2015-03-25 | 2017-03-07 | China University Of Petroleum | Dynamic point-the-bit rotary steerable drilling tool and measuring method thereof |
| CN108286413A (en) * | 2017-12-27 | 2018-07-17 | 中国石油集团长城钻探工程有限公司 | A kind of drilling guidance tool and well system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101586440B (en) | 2012-09-26 |
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee after: China National Offshore Oil Corporation Patentee after: CNOOC Research Institute Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee before: China National Offshore Oil Corporation Patentee before: CNOOC Research Center |
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC research institute limited liability company Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC Research Institute Patentee before: China National Offshore Oil Corporation |
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