CN202152635U - Drill stem axial oscillating tool - Google Patents
Drill stem axial oscillating tool Download PDFInfo
- Publication number
- CN202152635U CN202152635U CN2011202763574U CN201120276357U CN202152635U CN 202152635 U CN202152635 U CN 202152635U CN 2011202763574 U CN2011202763574 U CN 2011202763574U CN 201120276357 U CN201120276357 U CN 201120276357U CN 202152635 U CN202152635 U CN 202152635U
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- valve
- valve seat
- rotor
- stator
- nut
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Abstract
The utility model relates to a drill stem axial oscillating tool which is used for enhancing the extension drilling capability of a horizontal section in drilling of directional wells, horizontal wells and extended reach wells. The following technical scheme is adopted: the drill stem axial oscillating tool consists of a stator and rotor unit and a valve unit. The inner wall of the stator is adhered with stator rubber, the stator rubber and the rotor form a sealed cavity, the lower end of the rotor is provided with a runner inclined hole, and the valve is fixed at the lower end of the rotor by a valve nut; a valve seat is connected on a valve seat supporting body by a valve seat nut, and the valve seat supporting body is arranged in a valve shell in a threaded way; the valve seat is matched with the valve, and the valve can be opened or closed along with the movement of the rotor; and the valve shell is in threaded connection with the stator shell. The drill stem axial oscillating tool has the advantages of being strong in axial oscillating capability, simple in structure, safe and the like, and can enhance the extension drilling capability of directional wells, horizontal wells and extended reach wells.
Description
Technical field
The utility model relates to a kind of drill string axial oscillation instrument that the section of improving the standard is extended drilling ability that in directional well, horizontal well, extended reach well creep into, is used to.
Background technology
Along with deepening continuously of exploration and development process, the shared ratio of directional well, horizontal well, extended reach well is increasing.Long horizontal segment drilling technology at home and abroad is used widely, and mainly has benefited from its input-output ratio preferably.At present, foreign level well drilling cost has been reduced to 1.2～2 times of straight well, and output then is 4～8 times of straight well.Horizontal well technology mainly contains following advantage as a potential new technology: recover old well capacity, the oil-gas reservoir of exploitation complicated type, help the exploration and development evaluation, help environmental protection.The extended reach well technology is emerging a kind of drilling technology along with the development of measurement while drilling drilling technology, geologic steering drilling technology, closed loop drilling technology, becomes the important means of sea, exploitation beach and offshore oil and gas resource basically.At present, be drilled to the extended reach well of the ultra myriametre of horizontal movement abroad, and domestic dependence self strength can only be accomplished the extended reach well of the about 4000m of horizontal movement.In the drilling process of horizontal well and extended reach well, because frictional resistance is big, make that drilling efficiency is low, drilling period is long, drilling cost is high, this becomes the main bottleneck of restriction horizontal well and extended reach well development.In the practice, because the frictional resistance moment of torsion of tubing string is too big, the obvious step-down of rate of penetration following situation possibly appear: at the scene; The drillling tool twisting off accident can not gone up or take place to drilling tool; Do not reach the designing requirement of wellbore trajectory, the target zone rate that hits is low.
Continuously the pipe bit well starts from the 90's of last century, and up to the present, the whole world is used surplus the continuous pipe bit well 7000 mouthful, and annually increases by 750～850 mouthfuls, and the application in directional well, horizontal well and extended reach well more and more widely.But because the little flexibility of pipe size is big continuously, transmit the pressure of the drill ability, thereby it is limited to cause it to bore the horizontal segment drilling depth, has limited this The Application of Technology.
Reducing the frictional resistance that moves ahead of drill string in the horizontal segment, is to guarantee that horizontal well or extended reach well extend the key of creeping into long horizontal segment.
Summary of the invention
The purpose of the utility model is: in order to overcome above-mentioned difficult point, and the extension drilling ability of improve the standard well or extended reach well, a kind of drill string axial oscillation instrument that is used for horizontal well or extended reach well of special proposition.This instrument forms the fluid impact load of high frequency through consuming drilling liquid water horsepower, acts on the drill string, thereby reduces the frictional resistance that drill string runs at horizontal segment, and the section of improving the standard is extended drilling ability.
In order to achieve the above object, the technical scheme that the utility model adopts is: a kind of drill string axial oscillation instrument, form by two parts: and rotor unit 14 and valve cell 15, said rotor unit 14 is made up of stator case 2, stator rubber 3 and rotor 4; Valve cell 15 is made up of valve chest 5, valve body 8, valve body nut 7, valve seat 10, valve seat nut 11, valve seat supporter 12, valve base seal 9; It is characterized in that: the sulfuration of stator case 2 inwalls has stator rubber 3; Stator rubber 3 forms annular seal space with rotor 4; Rotor 4 lower ends have runner inclined hole 6, and valve body 8 is fixed in rotor 4 lower ends through valve body nut 7; Valve seat 10 is connected on the valve seat supporter 12 through valve seat nut 11, between valve seat 10 and the valve seat nut 11 valve base seal 9 is housed, and valve seat supporter 12 is through being threadedly connected to valve chest 5 inside; Valve seat 10 matches with valve body 8 and is close to all the time, forms opening or closing of valve cell 15 with rotor 4 motions, and valve opening 16 diameters are half the less than valve body 8 move distances; Valve chest 5 and stator case 2 are through being threaded; Instrument can link to each other with other drilling tool respectively with lower end screw thread 13 through upper end screw thread 1.
The beneficial effect that the utlity model has is: strong, simple in structure, the safety of (1) axial vibration ability, can improve the extension drilling ability of directional well, horizontal well and extended reach well horizontal segment; (2) if instrument is placed near the nearly drill bit, can improve rate of penetration, the high frequency axial oscillation of instrument can reduce the axial vibration intensity of drill bit, improves the even contact time of drill bit and rock, thus the raising rate of penetration; (3) axial oscillation can effectively destroy the established cutting bed of horizontal segment, and can prevent bit freezing.
Description of drawings
Fig. 1 is the structural representation of a kind of drill string axial oscillation of the utility model instrument.
Fig. 2 is the cross-sectional figure in rotor unit of a kind of drill string axial oscillation of the utility model instrument.
Fig. 3 is the valve cell working curve sketch map of a kind of drill string axial oscillation of the utility model instrument.
Among the figure: 1. oscillator upper end screw thread; 2. stator case; 3. stator rubber; 4. rotor; 5. valve chest; 6. runner inclined hole; 7. valve body nut; 8. valve body; 9. valve base seal; 10. valve seat; 11. valve seat nut; 12. valve seat supporter; 13. oscillator lower end screw thread; 14. rotor unit; 15. valve cell; 16. valve opening.
The specific embodiment
Like Fig. 1, Fig. 2 and shown in Figure 3, a kind of drill string axial oscillation instrument, form by two parts: rotor unit 14 and valve cell 15, said rotor unit 14 is made up of stator case 2, stator rubber 3 and rotor 4; Valve cell 15 is made up of valve chest 5, valve body 8, valve body nut 7, valve seat 10, valve seat nut 11, valve seat supporter 12, valve base seal 9; It is characterized in that: the sulfuration of stator case 2 inwalls has stator rubber 3; Stator rubber 3 forms annular seal space with rotor 4; Rotor 4 lower ends have runner inclined hole 6, and valve body 8 is fixed in rotor 4 lower ends through valve body nut 7; And valve seat 10 is connected on the valve seat supporter 12 through valve seat nut 11, between valve seat 10 and the valve seat nut 11 valve base seal 9 is housed, and valve seat supporter 12 is through being threadedly connected to valve chest 5 inside; Valve seat 10 matches with valve body 8 and is close to all the time; Form opening or closing of valve cells 15 with rotor 4 motion, what valve opening 16 diameters should be less than valve body 8 move distances is half the, utilizes the motion of rotor 4 to make the coincidence area change of valve body 8 and valve seat 10 runners; Drill string inner fluid power also changes thereupon; Produce fluid pulse, offer drilling rod or drill bit equably, thereby reach the purpose of reducing friction resistance and prolonging the horizontal segment drilling ability; Valve chest 5 and stator case 2 are through being threaded; A kind of drill string axial oscillation instrument can link to each other with other drilling tool respectively with oscillator lower end screw thread 13 through oscillator upper end screw thread 1.This instrument can improve the standard well, the transmission efficiency of the pressure of the drill when extended reach well creeps into reduce the frictional resistance that the horizontal segment drilling tool moves ahead and creeps into.
Claims (4)
1. a drill string axial oscillation instrument is made up of two parts: rotor unit (14) and valve cell (15); Said rotor unit (14) is made up of stator case (2), stator rubber (3) and rotor (4); Valve cell (15) is made up of valve chest (5), valve body (8), valve body nut (7), valve seat (10), valve seat nut (11), valve seat supporter (12), valve base seal (9); It is characterized in that: the sulfuration of stator case (2) inwall has stator rubber (3); Stator rubber (3) forms annular seal space with rotor (4); Rotor (4) lower end has runner inclined hole (6), and valve body (8) leans on valve body nut (7) to be fixed in rotor (4) lower end; Valve seat (10) is connected on the valve seat supporter (12) through valve seat nut (11), and valve seat supporter (12) is installed in valve chest (5) inside through screw thread; Valve seat (10) and valve body (8) match, and form opening or closing of valve cell (15) with rotor (4) motion; Valve chest (5) and stator case (2) are through being threaded; Drill string axial oscillation instrument can link to each other with other drilling tool with oscillator lower end screw thread (13) through oscillator upper end screw thread (1).
2. a kind of drill string axial oscillation instrument according to claim 1 is characterized in that: valve body (8) and valve seat (10) are close to all the time.
3. according to claim 1 and 2 described a kind of drill string axial oscillation instruments, it is characterized in that: what valve opening (16) diameter should be less than valve body (8) move distance is half the.
4. a kind of drill string axial oscillation instrument according to claim 1 is characterized in that: between valve seat (10) and the valve seat nut (11) valve base seal (9) is housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202763574U CN202152635U (en) | 2011-08-01 | 2011-08-01 | Drill stem axial oscillating tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202763574U CN202152635U (en) | 2011-08-01 | 2011-08-01 | Drill stem axial oscillating tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202152635U true CN202152635U (en) | 2012-02-29 |
Family
ID=45693135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202763574U Expired - Lifetime CN202152635U (en) | 2011-08-01 | 2011-08-01 | Drill stem axial oscillating tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202152635U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102418479A (en) * | 2011-08-01 | 2012-04-18 | 西南石油大学 | Axial oscillating tool for drill string |
| CN102587832A (en) * | 2012-03-26 | 2012-07-18 | 西南石油大学 | Pressure resistant tool for reducing frictional resistance of horizontal well section |
-
2011
- 2011-08-01 CN CN2011202763574U patent/CN202152635U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102418479A (en) * | 2011-08-01 | 2012-04-18 | 西南石油大学 | Axial oscillating tool for drill string |
| CN102587832A (en) * | 2012-03-26 | 2012-07-18 | 西南石油大学 | Pressure resistant tool for reducing frictional resistance of horizontal well section |
| CN102587832B (en) * | 2012-03-26 | 2014-02-26 | 西南石油大学 | Pressure resistant tool for reducing frictional resistance of horizontal well section |
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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: 20120229 |
|
| CX01 | Expiry of patent term |