CN103485718A - Anti-friction drag-reducing tool based on pulse excitation - Google Patents
Anti-friction drag-reducing tool based on pulse excitation Download PDFInfo
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- CN103485718A CN103485718A CN201310423104.9A CN201310423104A CN103485718A CN 103485718 A CN103485718 A CN 103485718A CN 201310423104 A CN201310423104 A CN 201310423104A CN 103485718 A CN103485718 A CN 103485718A
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Abstract
The invention relates to an anti-friction drag-reducing tool based on pulse excitation applied to the fields such as oil and gas drilling and geological drilling. Through the use of the tool, the problem that friction drag occurs to downhole power drilling and directional drilling can be solved effectively. According to the technical scheme, the tool is characterized in that a stator is disposed inside an outer sleeve, and a rotor motor is disposed inside the stator; the rotor motor is connected with an adapter through splines; the side of the adapter is provided with an oblique hole connected with an inner cavity of the adapter, the adapter is in interference connection with a moving valve plate, and the center of the moving valve plate is provided with a straight hole right facing the inner cavity of the adapter; the moving valve plate is in clearance fit with a fixed disc, the center of the fixed disc is provided with a straight hole, and the center of circle of the straight hole and the center of circle of the straight hole of the moving valve plate are staggered; the fixed disc is axially positioned through a step face of the inner wall of the outer sleeve and a snap ring. The tool has the advantages that friction drag is reduced significantly, highly-deviated well target is prolonged, drilling pressure loss and tool jamming risk are reduced, drilling speed of machinery is increased, orienting capacity of drilling tools is enhanced, and the reliability is high.
Description
Technical field
The present invention relates to a kind of antifriction instrument based on pulse excitation for technical equipment fields such as oil-gas drilling engineering, mining, geological drilling, construction work, construction of tunnel, shield structure and non-excavations.
Background technology
Extended reach well has the basic characteristics such as hole angle is large, well segment length, the gravitational effect problem caused thus causes underground drill stem to be subject to very large frictional resistance (axial friction and friction torque), cause sending bore that difficulty, the top ability of driving transfinite, drill string and casing wear serious, impact is crept into and completion practice normally.This high frictional resistance factor causes drilling speed to reduce, and finally causes drilling rod in the bending of well inside spin, has limited effective drilling well or workover treatment.Therefore, reducing the down-hole frictional resistance is technical problem important in extended reach well.Continuous-tube drilling well aspect, because its external diameter is less, easier flexing causes extended reach well and horizontal well construction difficulty, and antifriction becomes the key that the continuous-tube drilling well enlarges range of application, and exploitation antifriction instrument is even more important.
Summary of the invention
The object of the invention is to: for mud pressure being converted into to axial vibratory impulse, thereby effectively solve the frictional resistance problem occurred in hole-bottom power drilling and directed drilling, reduce the frictional resistance of the borehole wall for tubing string, extend the horizontal well target spot, reduce the bit freezing risk, the spy provides a kind of antifriction instrument based on pulse excitation.
For achieving the above object, the technical solution used in the present invention is: a kind of antifriction instrument based on pulse excitation, by outer tube, rotor motor, stator, adapter, motion valve plate, static card and snap ring, formed, its architectural feature is: the outermost layer of this antifriction instrument is outer tube, stator is set in outer tube, and stator is keyed in outer tube; Rotor motor is arranged in stator, and the specific lobe of rotor motor and stator is 1:2; The rotor motor lower end is internal spline, and the adapter upper end is external splines, between rotor motor and adapter, is spline joint; The adapter side has an inclined hole, inclined hole axis and adapter axial axis angle at 45 °, and what with inclined hole, be connected is the chamber of adapter inside; Between adapter and motion valve plate, be interference fit joint, motion valve plate center has a straight hole, the inner chamber of straight hole and adapter over against; Between motion valve plate and static card, be matched in clearance, static card center has a straight hole, and its straight hole diameter is less than motion valve plate straight hole diameter 5mm-15mm, and staggers in its straight hole center of circle and the motion valve plate straight hole center of circle; Static card is carried out axial location with step surface and the snap ring of outer sleeve inner wall, and forms matched in clearance with outer sleeve inner wall; Outer tube lower end threaded connection drill stem.Motion valve plate and static card all adopt wear-resisting alloy steel.
The invention has the beneficial effects as follows: (1) antifriction: by producing axial pulse excitation, continuable transmission of pressure, effectively reduce stick slip, thereby obviously reduce the frictional resistance between the borehole wall and tubing string; (2) reduce the risk of bit freezing: be used in conjunction with drill bit, can transmit stably the pressure of the drill, can not produce the percussion drill phenomenon, avoid drilling rod at the bending of well inside spin and locking phenomenon, reduce the bit freezing risk; (3) improve the rate of penetration of drill bit: by the load transfer that stably drilling assembly can be produced to drill bit, effectively extend the target spot of large gradient extended reach well, in adjusting and keeping the power drilling tool process, save time (frictional resistance is little), effectively improve rate of penetration in can not applying the slip drilling process of large the pressure of the drill, thereby improve the average rate of penetration of drill bit.(4) structural reliability is high: tool operation is simple, easily start, lightweight, take up space little, firm reliable.
The accompanying drawing explanation
The structural representation that Fig. 1 is a kind of antifriction instrument based on pulse excitation of the present invention.
In figure: 1. outer tube, 2. rotor motor, 3. stator, 4. adapter, 5. motion valve plate, 6. static card, 7. snap ring.
The lateral view of adapter 4 splined that Fig. 2 is a kind of antifriction instrument based on pulse excitation of the present invention.
The specific embodiment
Shown in Fig. 1, the present invention is comprised of outer tube 1, rotor motor 2, stator 3, adapter 4, motion valve plate 5, static card 6, snap ring 7.Outermost layer of the present invention is outer tube 1, in the course of work, mud in outer tube 1 enters in stator 3, and mud rotor driven motor 2, in the interior rotation of stator 3, can drive rotor motor 2 to drive adapter 4 by inner mud pressure and rotate together with motion valve plate 5.This power unit can not drive drill bit, only for motion valve plate 5 provides power, drives its rotation.Mud is through after rotor, and the inclined hole by adapter 4 sides enters in adapter 4 inner chambers, and wherein inclined hole makes mud more easily enter adapter 4 inner chambers; Motion valve plate 5 has eyelet and flows in the straight hole of motion valve plate 5 over against, mud with adapter 4 inner chambers; Due to rotor motor 2 entrys into service, motion valve plate 5 is also and then in the interior oscillating motion of outer tube 1.Be below one to have the static card 6 of centre bore, step surface and snap ring 7 by outer tube 1 inwall carry out axial location, and form matched in clearance with outer tube 1 inwall; Between static card 6 and motion valve plate 5, it is matched in clearance; The diameter of static card 6 interior straight holes is less than motion valve plate 5 straight hole diameters, and staggers in its straight hole center of circle and the motion valve plate 5 straight hole centers of circle; Mud flows in the straight hole of static card 6 from motion valve plate 5 straight holes.Because there is relative motion in two holes, so area of passage is also in continuous variation; When the two central aperture, area of passage increases, if be rotated further, two eyelets stagger part, makes the area of passage reduction.Constantly change by area of passage, produce pressure pulse and cause axial vibration, drive whole drilling tool axially-movable, thereby abolish the quiet frictional resistance between drilling tool and the borehole wall, reach the effect of antifriction.
Claims (3)
1. the antifriction instrument based on pulse excitation, by outer tube, rotor motor, stator, adapter, motion valve plate, static card and snap ring, formed, it is characterized in that: at outer tube (1), stator (3) is set, stator (3) is keyed in outer tube (1); Rotor motor (2) is arranged in stator (3), and rotor motor (2) is 1:2 with the specific lobe of stator (3); Rotor motor (2) lower end is internal spline, and adapter (4) upper end is external splines, between rotor motor (2) and adapter (4), is spline joint; Adapter (4) side has an inclined hole, and what join with inclined hole is the inner cavity of adapter (4); Between adapter (4) and motion valve plate (5), for interference is connected, motion valve plate (5) center has straight hole, the inner chamber of its straight hole and adapter (4) over against; Between motion valve plate (5) and static card (6), be matched in clearance, static card (6) center has a straight hole, and the straight hole diameter of static card (6) is less than the straight hole diameter 5mm-15mm of motion valve plate (5); The straight hole home position of the straight hole center of circle of static card (6) and motion valve plate (5) staggers; Static card (6) is carried out axial location with step surface and the snap ring (7) of outer tube (1) inwall, and forms matched in clearance with outer tube (1) inwall; Outer tube (1) lower end threaded connection drill stem.
2. antifriction instrument according to claim 1, it is characterized in that: adapter (4) side has inclined hole, the axial axis angle at 45 ° of its inclined hole axis and adapter (4).
3. antifriction instrument according to claim 1, it is characterized in that: above-mentioned motion valve plate (5) and static card (6) all adopt wear-resisting alloy steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310423104.9A CN103485718A (en) | 2013-09-17 | 2013-09-17 | Anti-friction drag-reducing tool based on pulse excitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310423104.9A CN103485718A (en) | 2013-09-17 | 2013-09-17 | Anti-friction drag-reducing tool based on pulse excitation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103485718A true CN103485718A (en) | 2014-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310423104.9A Pending CN103485718A (en) | 2013-09-17 | 2013-09-17 | Anti-friction drag-reducing tool based on pulse excitation |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655377A (en) * | 2015-02-10 | 2015-05-27 | 中国石油大学(华东) | Indoor experimental device for antifriction resistance property of axial vibration of petroleum drilling pipe column |
| CN105221074A (en) * | 2015-09-18 | 2016-01-06 | 西南石油大学 | A kind of drilling well antifriction instrument |
| CN108678674A (en) * | 2018-07-20 | 2018-10-19 | 西安石油大学 | Shale gas develops double acting and couples coiled tubing resistance absorber |
| CN110067552A (en) * | 2019-05-28 | 2019-07-30 | 西南石油大学 | Oil/gas well tubing string vibration simulation test device |
| CN111677449A (en) * | 2020-08-11 | 2020-09-18 | 中煤科工集团西安研究院有限公司 | Underground hydraulic pressurizing rotary directional screw drill tool for coal mine |
| CN112593869A (en) * | 2020-12-25 | 2021-04-02 | 西南石油大学 | But centralizer of self-adaptation reducing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6279670B1 (en) * | 1996-05-18 | 2001-08-28 | Andergauge Limited | Downhole flow pulsing apparatus |
| CN2716483Y (en) * | 2004-05-26 | 2005-08-10 | 中国石化集团胜利石油管理局钻井工艺研究院 | Downhole vibrodrilling tool induced by hydraulic pulse |
| CN102704842A (en) * | 2012-05-30 | 2012-10-03 | 中国石油化工集团公司 | Hydro-oscillator for well drilling |
| CN202689935U (en) * | 2012-05-30 | 2013-01-23 | 中国石油化工集团公司 | Hydraulic vibrator for drilling |
-
2013
- 2013-09-17 CN CN201310423104.9A patent/CN103485718A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6279670B1 (en) * | 1996-05-18 | 2001-08-28 | Andergauge Limited | Downhole flow pulsing apparatus |
| CN2716483Y (en) * | 2004-05-26 | 2005-08-10 | 中国石化集团胜利石油管理局钻井工艺研究院 | Downhole vibrodrilling tool induced by hydraulic pulse |
| CN102704842A (en) * | 2012-05-30 | 2012-10-03 | 中国石油化工集团公司 | Hydro-oscillator for well drilling |
| CN202689935U (en) * | 2012-05-30 | 2013-01-23 | 中国石油化工集团公司 | Hydraulic vibrator for drilling |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655377A (en) * | 2015-02-10 | 2015-05-27 | 中国石油大学(华东) | Indoor experimental device for antifriction resistance property of axial vibration of petroleum drilling pipe column |
| CN104655377B (en) * | 2015-02-10 | 2016-05-11 | 中国石油大学(华东) | The axial vibration of oil drilling pipe post subtracts friction loss characteristic indoor experimental apparatus |
| CN105221074A (en) * | 2015-09-18 | 2016-01-06 | 西南石油大学 | A kind of drilling well antifriction instrument |
| CN108678674A (en) * | 2018-07-20 | 2018-10-19 | 西安石油大学 | Shale gas develops double acting and couples coiled tubing resistance absorber |
| CN108678674B (en) * | 2018-07-20 | 2023-11-28 | 西安石油大学 | Shale gas developing double-acting coupling coiled tubing drag reducer |
| CN110067552A (en) * | 2019-05-28 | 2019-07-30 | 西南石油大学 | Oil/gas well tubing string vibration simulation test device |
| CN110067552B (en) * | 2019-05-28 | 2021-11-23 | 西南石油大学 | Oil gas well tubular column vibration simulation testing arrangement |
| CN111677449A (en) * | 2020-08-11 | 2020-09-18 | 中煤科工集团西安研究院有限公司 | Underground hydraulic pressurizing rotary directional screw drill tool for coal mine |
| CN111677449B (en) * | 2020-08-11 | 2020-12-01 | 中煤科工集团西安研究院有限公司 | Underground hydraulic pressurizing rotary directional screw drill tool for coal mine |
| CN112593869A (en) * | 2020-12-25 | 2021-04-02 | 西南石油大学 | But centralizer of self-adaptation reducing |
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Application publication date: 20140101 |