CN203796184U - Resistance and torque reducing device for drill stem - Google Patents
Resistance and torque reducing device for drill stem Download PDFInfo
- Publication number
- CN203796184U CN203796184U CN201420136531.9U CN201420136531U CN203796184U CN 203796184 U CN203796184 U CN 203796184U CN 201420136531 U CN201420136531 U CN 201420136531U CN 203796184 U CN203796184 U CN 203796184U
- Authority
- CN
- China
- Prior art keywords
- outer sleeve
- main body
- roller
- body joint
- drill string
- 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.)
- Expired - Lifetime
Links
- 230000009467 reduction Effects 0.000 claims description 12
- 230000007704 transition Effects 0.000 claims description 8
- 238000005553 drilling Methods 0.000 abstract description 24
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 10
- 238000005096 rolling process Methods 0.000 abstract description 8
- 239000012530 fluid Substances 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229910052655 plagioclase feldspar Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model discloses a resistance and torque reducing device for a drill stem. The resistance and torque reducing device comprises a body connector and an outer sleeve, wherein the body connector is of hollow shaft structure, and the outer sleeve sleeves the body connector. The outer sleeve is provided with at least two rolling units. The rolling units are uniformly distributed at the outer edge of the outer sleeve, and the axis of the outer sleeve is parallel to the axis of the body connector. Each rolling unit is provided with at least one wheel inside, and the axes of the wheels are perpendicular to the outer sleeve. In the process of drilling a directional well, the resistance and torque reducing device can bear weight of the drill stem. The wheels on the outer sleeve contact with the well wall, and sliding friction between the drill stem and the well wall is changed into rolling friction between the wheels of the rolling units and the well wall, so that friction during drilling is greatly reduced, drilling pressure can be smoothly applied on a drill bit, and drilling efficiency is improved. Meanwhile, a low-friction-resistance antiwear sleeve is arranged between the body connector and the body connector, so that the body connector and the outer sleeve can rotate relative to each other, friction resistance of relative rotation of the body connector and the outer sleeve is reduced and torque generated during directional drilling is thereby reduced.
Description
Technical field
The utility model relate to a kind of in oil directed drilling engineering for reducing drill string frictional resistance, reduce drill string and fall the device of turning round.
Background technology
In directed drilling, especially (be that drilling well plagioclase is greater than 2 with the ratio of vertical depth at high angle hole, hole angle is at the directional well of 60 ° to 86 °) in the drilling process of net horizontal section and shale gas horizontal well horizontal segment (hole angle reaches or approaches 90 °), because the weight of drill string self is applied on the borehole wall, in drilling process, can produce very large frictional resistance, cause the pressure of the drill to be applied to smoothly on drill bit, produce backing pressure phenomenon, have a strong impact on rate of penetration and drilling efficiency.In drill string rotating process, can produce moment of torsion, easily cause drilling string failure.Existing drill string excitation friction reducer, mainly changes the static friction between drill string and the borehole wall into dynamic friction by periodic vibration, has reduced to a certain extent resistance.But drill string excitation friction reducer complex structure, manufacturing cost is high, and violent vibration is easy to cause the destruction of drill string and other downhole tool.
Utility model content
The purpose of this utility model is to overcome the above problem that prior art exists, provide a kind of drill string drag reduction to fall and turn round device, reduce frictional resistance and moment of torsion in the complex structural well drilling process such as extended reach well, long horizontal sections horizontal well, the pressure of the drill can be applied on drill bit smoothly, improve drilling efficiency; Axle is fixed on to device inside simultaneously, avoids apparatus parts to lose efficacy and fall into well and cause the danger of bit freezing; The deflection inclined-plane of outer sleeve body can make drilling fluid in the time flowing through, produce eddy current, can reduce landwaste and adhere on device.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the utility model is achieved through the following technical solutions:
A kind of drill string drag reduction falls turns round device, is made up of the main body joint of hollow shaft structure, the outer sleeve body being socketed on main body joint.
Described outer sleeve body is provided with at least two axial accommodating windows, and one group of tourelle is set in each accommodating window.
Described tourelle comprises roller and turning rolls; Described turning rolls is contained between main body joint and outer sleeve body, and be embedded in inside described accommodating window, the cambered surface of described turning rolls inner side for matching with main body joint, arranged outside is useful on places the roller holding tank of roller and for half circle core shaft mounting groove of roller shaft is installed; Described roller is loaded in roller holding tank by roller shaft, and the outer rim of outer sleeve body is exposed and protruded from outside from described accommodating window, and described roller axis is vertical with outer sleeve body axis.
Further, the outside of described accommodating window is axial flat cuboid convex shape, and the two ends of flat cuboid convex shape join by transition inclined-plane and described main body joint respectively, and the transition inclined-plane at two ends reduces gradually to clockwise direction deflection and area respectively.
preferably, described tourelle is provided with six groups, and every group of described tourelle arranges at least one roller.
Further, on described main body joint, be provided with the spacing axle collar, described outer sleeve body one end is close proximity to the described spacing axle collar, and the other end is fixed by the connector extruding being connected on main body joint, and connector and main body joint are threaded connection.
Further, between described outer sleeve body and described main body joint, be provided with neck bush.
The beneficial effects of the utility model are:
1, in directional well especially its non-straight well section drilling process, this device can bear the weight of drill string.Roller on its outer sleeve body contacts with the borehole wall, the sliding friction of drill string and the borehole wall is changed into the rolling friction of this device roller and the borehole wall, has reduced greatly the frictional force in drilling process, and the pressure of the drill can be applied on drill bit smoothly, improves drilling efficiency.The neck bush that simultaneously has low frictional resistance between main body joint and outer sleeve body, has reduced the circumferential frictional resistance of main body joint in the time that outer sleeve body rotates, and reduces the moment of torsion producing in directed drilling process.
2, the transition inclined-plane at accommodating window two ends can make drilling fluid in the time flowing through the annular clearance of this structure and the borehole wall, forms eddy current, is conducive to remove in pit shaft, be attached to the landwaste on device.
3, roller axle is fixed on to device inside, has effectively avoided device component to fall into the bit freezing danger that well causes, improved safety.
4, the six groups of tourelles that distribute on same circumference contact well roller with the borehole wall, better reduce resistance.
5, the neck bush between outer sleeve body and main body can reduce the circumferential frictional resistance of main body in the time that overcoat rotates, thereby reduces moment of torsion.
Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to better understand technological means of the present utility model, and can be implemented according to the content of manual, below with preferred embodiment of the present utility model and coordinate accompanying drawing to be described in detail as follows.Detailed description of the invention of the present utility model is provided in detail by following examples and accompanying drawing thereof.
Brief description of the drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 drill string drag reduction falls turns round device front view;
Fig. 2 drill string drag reduction falls turns round device sectional view;
Fig. 3 roller carrier schematic diagram;
Fig. 4 outer sleeve body structural representation;
The sectional drawing of Fig. 5 outer sleeve body.
Number in the figure explanation: 1, main body joint, 101, the spacing axle collar, 2, outer sleeve body, 21, accommodating window, 22, flat cuboid convex shape, 23, transition inclined-plane, 3, tourelle, 31, roller, 32, turning rolls, 321, cambered surface, 322, roller holding tank, 323, half circle core shaft mounting groove, 5, connector, 6, neck bush.
Detailed description of the invention
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
Shown in seeing figures.1.and.2, a kind of drill string drag reduction falls turns round device, formed by the main body joint 1 of hollow shaft structure, the outer sleeve body 2 being socketed on main body joint 1, on described main body joint 1, be provided with the spacing axle collar 101, described outer sleeve body 2 one end are close proximity to the described spacing axle collar 101, the other end is fixed by connector 5 extruding that are connected on main body joint 1, and connector 5 is threaded connection with main body joint 1.Between described outer sleeve body 2 and described main body joint 1, be provided with neck bush 6.Neck bush 6 can reduce the circumferential frictional resistance of main body in the time that overcoat rotates, thereby reduces moment of torsion.
On described outer sleeve body 2, be provided with and be provided with at least two axial accommodating windows 21, one group of tourelle 3 is set in each accommodating window.Referring to Fig. 3, tourelle 3 comprises roller 31 and turning rolls 32.Turning rolls 32 is contained between main body joint 1 and outer sleeve body 2, and be embedded in described accommodating window 21 inner sides, described turning rolls 32 inner sides are the cambered surface 321 matching with main body joint 1, arranged outside be useful on place roller 31 roller holding tank 322 and for half circle core shaft mounting groove 323 of roller shaft is installed.Roller 31 is loaded in roller holding tank 322 by roller shaft, and the outer rim of outer sleeve body is exposed and protruded from outside from described accommodating window, and described roller 31 axis are vertical with outer sleeve body axis.Like this axle of roller is fixed on to tourelle 3 inside, has effectively avoided device component to fall into the bit freezing danger that well causes, improved safety.
As preferred embodiment of the present utility model, described tourelle 3 is provided with six groups, and the six groups of tourelles 3 that distribute on same circumference contact well roller with the borehole wall, better reduce resistance.As preferred embodiment of the present utility model, described every group of tourelle 3 is respectively arranged with four rolling 31, is arranged in turning rolls 32.
Referring to Fig. 4 and Fig. 5, the outside of accommodating window 21 is axial flat cuboid convex shape 22, the two ends of flat cuboid convex shape join by transition inclined-plane 23 and described main body joint 1 respectively, the transition inclined-plane 23 at two ends reduces gradually to clockwise direction deflection and area respectively, can make drilling fluid in the time flowing through the annular clearance of this device and the borehole wall, form eddy current, be conducive to remove the landwaste being attached on device.
In the time that the non-straight well section of directional well is crept into, this device links together with drill string, can bear the weight of drill string.Concrete quantity and lay distance and determine according to on-the-spot actual condition.Roller 31 on this device outer sleeve body 2 contacts with the borehole wall, the sliding friction of drill string and the borehole wall is changed into the rolling friction of roller and the borehole wall of this device, reduce greatly the frictional force in drilling process, the pressure of the drill can be applied on drill bit smoothly, improved drilling efficiency.The neck bush 6 that simultaneously has low frictional resistance between main body joint 1 and outer sleeve body 2, has reduced the circumferential frictional resistance of main body joint in the time that outer sleeve body rotates, thereby reduces the moment of torsion producing in directed drilling process.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (6)
1. drill string drag reduction falls and turns round a device, is made up of the main body joint (1) of hollow shaft structure, the outer sleeve body (2) being socketed on main body joint (1), it is characterized in that:
Described outer sleeve body (2) is provided with at least two axial accommodating windows (21), and one group of tourelle (3) is set in each accommodating window;
Described tourelle comprises roller (31) and turning rolls (32); Described turning rolls (32) is contained between main body joint (1) and outer sleeve body (2), and be embedded in inside described accommodating window (21), described turning rolls (32) the inner side cambered surface (321) for matching with main body joint (1), arranged outside is useful on places the roller holding tank (322) of roller (31) and for half circle core shaft mounting groove (323) of roller shaft is installed; Described roller (31) is loaded in roller holding tank (322) by roller shaft, and the outer rim of outer sleeve body is exposed and protruded from outside from described accommodating window, and described roller (31) axis is vertical with outer sleeve body axis.
2. drill string drag reduction according to claim 1 falls and turns round device, it is characterized in that: the outside of described accommodating window (21) is axial flat cuboid convex shape (22), the two ends of flat cuboid convex shape join by transition inclined-plane (23) and described main body joint (1) respectively, and the transition inclined-plane (23) at two ends reduces gradually to clockwise direction deflection and area respectively.
3. drill string drag reduction according to claim 1 and 2 falls and turns round device, it is characterized in that: described tourelle (3) is evenly provided with six groups.
4. drill string drag reduction according to claim 1 and 2 falls and turns round device, it is characterized in that: described every group of tourelle (3) arranges at least one roller (31).
5. drill string drag reduction according to claim 1 and 2 falls and turns round device, it is characterized in that: on described main body joint (1), be provided with the spacing axle collar (101), described outer sleeve body (2) one end is close proximity to the described spacing axle collar (101), the other end is fixed by connector (5) extruding being connected on main body joint (1), and connector (5) is threaded connection with main body joint (1).
6. drill string drag reduction according to claim 1 and 2 falls and turns round device, it is characterized in that: between described outer sleeve body (2) and described main body joint (1), be provided with neck bush (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420136531.9U CN203796184U (en) | 2014-03-25 | 2014-03-25 | Resistance and torque reducing device for drill stem |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420136531.9U CN203796184U (en) | 2014-03-25 | 2014-03-25 | Resistance and torque reducing device for drill stem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203796184U true CN203796184U (en) | 2014-08-27 |
Family
ID=51378405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420136531.9U Expired - Lifetime CN203796184U (en) | 2014-03-25 | 2014-03-25 | Resistance and torque reducing device for drill stem |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203796184U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907115A (en) * | 2017-05-04 | 2017-06-30 | 西南石油大学 | A kind of roller type antifriction pipe nipple |
-
2014
- 2014-03-25 CN CN201420136531.9U patent/CN203796184U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907115A (en) * | 2017-05-04 | 2017-06-30 | 西南石油大学 | A kind of roller type antifriction pipe nipple |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |