CN202483467U - Cardan shaft of spherical hinge positive displacement motor - Google Patents
Cardan shaft of spherical hinge positive displacement motor Download PDFInfo
- Publication number
- CN202483467U CN202483467U CN2012200160929U CN201220016092U CN202483467U CN 202483467 U CN202483467 U CN 202483467U CN 2012200160929 U CN2012200160929 U CN 2012200160929U CN 201220016092 U CN201220016092 U CN 201220016092U CN 202483467 U CN202483467 U CN 202483467U
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- bulb
- ball
- lower contact
- hydraulic motor
- drive shaft
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Abstract
The utility model relates to a cardan shaft of a spherical hinge positive displacement motor. The cardan shaft is applicable to gliding guide well drilling of directional wells, horizontal wells and the like. The cardan shaft is composed of an upper connector (1), a disturbance rod (3), a lower connector (12) and a sealing cup (6), an upper bulb (2) and a lower bulb (11) are respectively arranged at two ends of the disturbance rod (3), 6-8 small ball sockets are circumferentially and evenly distributed on the central cross section of the lower bulb (11), a torsion ball (8) is respectively installed in each small ball socket, 6-8 half slots are correspondingly distributed at the periphery of the inner wall of the lower connector (12), the 6-8 half slots are matched with the torsion ball (8), the sealing cup (6) is arranged on the lower connector (12) and the lower bulb (11) to seal the lower bulb (11) in the lower connector (12), 4-6 groups of J-shaped through holes are evenly distributed on the periphery of the lower connector (12), and a pressure balanced plug (9) is installed in the holes to keep the external pressure and the internal pressure to be balanced and prevent sediment from entering so as to greatly prolong service life of the cardan shaft.
Description
Technical field
The utility model relates to a kind of ball pivot helicoid hydraulic motor universal drive shaft, is specially adapted to helicoid hydraulic motor and is used to bore slide-and-guide drilling wells such as directional well, horizontal well.
Background technology
In boring directional well, inclined shaft, horizontal well; What the most generally use is curved housing helicoid hydraulic motor, is used for the slide-and-guide drilling technology, Controlling Borehole Trajectory; The slide-and-guide drilling technology adopts curved housing helicoid hydraulic motor exactly; Cooperate the MWD wireless drilling inclinometers to carry out the technology of TRAJECTORY CONTROL, can deflecting, drop angle, adjustment orientation, hold angle, to reach the purpose of control well-drilling borehole track.Therefore, remove at present and bore big displacement extended reach well, use outside the rotary steerable drilling technology; It is still the most general to use the helicoid hydraulic motor deflecting to be used for the slide-and-guide drilling technology, but curved housing helicoid hydraulic motor deflecting is used for the slide-and-guide drilling technology, yet has many problems at present; Mainly be exactly the helicoid hydraulic motor life problems, wherein be exactly key issue the application life of helicoid hydraulic motor universal drive shaft, because the existing planetary motion of motion of helicoid hydraulic motor rotor has spinning motion again; So; No matter be straight helicoid hydraulic motor or curved housing helicoid hydraulic motor, all must be connected between rotor and the bottom power transmission shaft, owing to the restriction of radial space through parts mechanisms such as universal drive shafts; The structure and the volume of universal drive shaft all are restricted, and universal drive shaft just becomes the key factor that influences the helicoid hydraulic motor life-span.The form of structure of existing universal drive shaft mainly contains two kinds, and a kind of is exactly petal type, and a kind of is exactly ball-and-socket hinge style; Petal type is to utilize line cutting (or laser) to cut out movable petal; Just lean on three face transfer torques at this slot place,, can not carry out case hardening again and handle because the surface ratio after the line cutting is more coarse; Can not seal lubrication, so application life is short about 100 hours.Ball-and-socket hinge style can seal lubrication, leans on 6～8 steel ball transfer torques, and the lower central ball-joint receives thrust and as the movable supporting point of disturbing rod; Often receive the interference of lateral force here, ball seat is destroyed, damage sealing; Sealing is once go wrong; Will get into drilling fluid, the bead of transfer torque is quick-wearing very, so application life is also about 120 hours.
Summary of the invention
The utility model purpose is to provide a kind of ball pivot helicoid hydraulic motor universal drive shaft reliable, long service life that seals.
The utility model is realized by following scheme: it is made up of top connection, lower contact, obturating cup, moment of torsion ball, disturbing rod, and its disturbing rod two ends have last bulb and following bulb respectively, on the circumference of the center cross-sectional of last bulb and following bulb equally distributed 6～8 little ball-and-sockets is arranged; Respectively adorn a moment of torsion ball in the little ball-and-socket, top connection and lower contact periphery of inner wall correspondence are distributed with 6～8 half slots, match with eight moment of torsion balls; Bulb passes through moment of torsion ball and top connection and lower contact transfer torque with following bulb on the disturbing rod; Between top connection and lower contact and last bulb and the following bulb obturating cup is arranged all, obturating cup is a slice rubber bodies, and obturating cup is fixed on the joint through pressure cap by the seal washer supporting and by the sealing clamp that two semicircular ring are formed; Thereby make and realize sealing between bulb and following bulb, moment of torsion ball and top connection and the lower contact; For guaranteeing that annular seal space is identical with ambient pressure,, a pressure balance plug is housed respectively in the hole at top connection and equally distributed 4～6 groups of J-shaped through holes of lower contact circumference; The pressure balance plug is fixed by pressure cap; The pressure balance plug is a very thin netted plug, and it can let drilling fluid filtrate pass through in the down-hole, and sand grains can not pass through; External pressure can enter seal cavity through pressure balance like this; Reach internal and external pressure balance, thereby improved lubricated between last bulb and following bulb, moment of torsion ball and top connection and the lower contact obturating cup, the application life of having improved universal drive shaft.
The utility model is owing to adopt the last bulb at disturbing rod two ends and following bulb directly to cooperate with big ball seat; Motion is flexible, and contact surface is big, stress is little, and is simple in structure; No matter the bulb disturbance track at disturbing rod two ends how; Obturating cup closely cooperates all the time, and is difficult for being destroyed, and has improved the reliability of sealing; Adopt the pressure balance plug structure, remain seal cavity and extraneous pressure balance during drilling well, make that sealing is more reliable.
Description of drawings:
Fig. 1 is the utility model structure principle chart.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in detail:
The utility model is made up of top connection (1), disturbing rod (3), lower contact (12), moment of torsion ball (8), obturating cup (6), and its disturbing rod (3) two ends have last bulb (2) and following bulb (11) respectively, and last bulb (2) is identical with the internal construction that lower contact (12) is connected with following bulb (2) with top connection (1); Existing is that example is described with lower contact (12) with following bulb (11) syndeton, and equally distributed 6～8 little ball-and-sockets are arranged on the circumference of the center cross-sectional of following bulb (11), respectively adorns a moment of torsion ball (8) in the little ball-and-socket; Corresponding 6～8 half slots that distribute of lower contact (12) periphery of inner wall match with moment of torsion ball (8), and disturbing rod (3) bulb (11) down passes through moment of torsion ball (8) and lower contact (12) transfer torque; Between lower contact (12) and the following bulb (11) obturating cup (6) is arranged; Obturating cup (6) is a slice rubber bodies, and obturating cup (6) is by seal washer (7) supporting, and assembles sealing clamp (5) by two semi-rings and be fixed in the lower contact (12) through pressure cap (4); Thereby make down bulb (11), moment of torsion ball (8) realize sealing with lower contact (12); For guaranteeing that annular seal space is identical with ambient pressure,, a pressure balance plug (9) is housed respectively in the hole at equally distributed 4～6 groups of J-shaped through holes of lower contact (12) circumference; Pressure balance plug (9) is fixed by the pressure cap of band centre bore; Pressure balance plug (9) is a very thin netted plug, and it passes through after can letting drilling fluid filter in the down-hole, and sand grains can not pass through; External pressure can get into seal cavity through aperture, the pressure balance plug (9) of band centre bore pressure cap like this; Keep internal and external pressure balance, lubricate the application life of having improved universal drive shaft between time bulb (11), moment of torsion ball (8) and the obturating cup (6) thereby improved.During work,, outside universal drive shaft, load onto the curved housing that has certain deflecting angle according to the drilling technology requirement; Universal drive shaft top connection (1) is connected with the screw rod of helicoid hydraulic motor; Lower contact (12) is connected with power transmission shaft, and termination drill bit under the power transmission shaft forms whole helicoid hydraulic motor; Helicoid hydraulic motor arrives the shaft bottom down with drilling rod; The screw rotor generation planet that is driven helicoid hydraulic motor by drilling liquid pressure rotates and self rotation, because the effect of universal drive shaft makes this non-concentric rotation convert the concentric rotation of power transmission shaft into, then through power transmission shaft drive drill bit rotation carrying out drilling well.
Claims (5)
1. ball pivot helicoid hydraulic motor universal drive shaft; It is made up of top connection (1), disturbing rod (3), lower contact (12), moment of torsion ball (8), obturating cup (6), it is characterized in that disturbing rod (3) two ends have last bulb (2) and following bulb (11) respectively, have equally distributed 6～8 little ball-and-sockets on the circumference of the center cross-sectional of following bulb (11); Respectively adorn a moment of torsion ball (8) in the little ball-and-socket; Corresponding 6～8 half slots that distribute of lower contact (12) periphery of inner wall match with moment of torsion ball (8), and lower contact (12) has an obturating cup (6) with following bulb (11); Obturating cup (6) is fixed in the lower contact (12) through pressure cap (4) by seal washer (7) supporting and by sealing clamp (5); Equally distributed 4～6 groups of J-shaped through holes of lower contact (12) circumference respectively are equipped with a pressure balance plug (9) in the hole, pressure balance plug (9) is fixed by the pressure cap that has centre bore.
2. a kind of ball pivot helicoid hydraulic motor universal drive shaft according to claim 1 is characterized in that obturating cup (6) is a slice rubber bodies.
3. a kind of ball pivot helicoid hydraulic motor universal drive shaft according to claim 1 is characterized in that pressure balance plug (9) is a very thin netted plug.
4. a kind of ball pivot helicoid hydraulic motor universal drive shaft according to claim 1 is characterized in that sealing clamp (5) is to be assembled by two semi-rings.
5. a kind of ball pivot helicoid hydraulic motor universal drive shaft according to claim 1 is characterized in that bulb (2) is identical with the internal construction that lower contact (12) is connected with following bulb (2) with top connection (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200160929U CN202483467U (en) | 2012-01-06 | 2012-01-06 | Cardan shaft of spherical hinge positive displacement motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200160929U CN202483467U (en) | 2012-01-06 | 2012-01-06 | Cardan shaft of spherical hinge positive displacement motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202483467U true CN202483467U (en) | 2012-10-10 |
Family
ID=46957894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200160929U Expired - Lifetime CN202483467U (en) | 2012-01-06 | 2012-01-06 | Cardan shaft of spherical hinge positive displacement motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202483467U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939094A (en) * | 2014-05-14 | 2014-07-23 | 西南石油大学 | Formation deviating force measurement device and method |
| CN104499957A (en) * | 2014-12-18 | 2015-04-08 | 山西风雷钻具有限公司 | Universal joint for screw drilling tools |
| CN111852334A (en) * | 2019-04-30 | 2020-10-30 | 中国石油化工股份有限公司 | Reactive torque automatic balancing device for screw drill, drilling pipe string and method |
| CN112593867A (en) * | 2020-12-28 | 2021-04-02 | 西南石油大学 | Double-layer structure power drilling tool universal shaft connector |
-
2012
- 2012-01-06 CN CN2012200160929U patent/CN202483467U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939094A (en) * | 2014-05-14 | 2014-07-23 | 西南石油大学 | Formation deviating force measurement device and method |
| CN104499957A (en) * | 2014-12-18 | 2015-04-08 | 山西风雷钻具有限公司 | Universal joint for screw drilling tools |
| CN111852334A (en) * | 2019-04-30 | 2020-10-30 | 中国石油化工股份有限公司 | Reactive torque automatic balancing device for screw drill, drilling pipe string and method |
| CN111852334B (en) * | 2019-04-30 | 2021-09-24 | 中国石油化工股份有限公司 | Reactive torque automatic balancing device for screw drill, drilling pipe string and method |
| CN112593867A (en) * | 2020-12-28 | 2021-04-02 | 西南石油大学 | Double-layer structure power drilling tool universal shaft connector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121010 |
|
| CX01 | Expiry of patent term |