CN204326968U - A kind of drilling tool - Google Patents
A kind of drilling tool Download PDFInfo
- Publication number
- CN204326968U CN204326968U CN201420701864.1U CN201420701864U CN204326968U CN 204326968 U CN204326968 U CN 204326968U CN 201420701864 U CN201420701864 U CN 201420701864U CN 204326968 U CN204326968 U CN 204326968U
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- China
- Prior art keywords
- spline
- urceolus
- mandrel
- processed
- drilling tool
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Abstract
The utility model discloses a kind of drilling tool.Described drilling tool comprises spline urceolus, spline mandrel, anti-lost cylinder and impulse generator, drill bit; Spline urceolus is processed with the by-pass duct running through spline urceolus barrel; Spline mandrel bottom is connected with impulse generator; Impulse generator lower end is connected with drill bit; Spline mandrel and spline urceolus by spline joint, and can realize moment of torsion transmission and slide up and down; Spline mandrel drives bypass to be sealed in spline urceolus and moves up and down, thus controls the switch of by-pass port.This drilling tool structure is simple, can realize connection and the isolation of annular space inside and outside drill string; Small displacement drilling well can be realized, high flow rate washover; Pulse cavitating jet impact force can be made full use of, and utilize hydraulic pressurization function to improve the pressure of the drill, thus improve the rate of penetration of drilling well.
Description
Technical field
The utility model relates to a kind of drilling tool field, particularly relates to a kind of drilling tool.
Background technology
Drilling engineering is the engineering that in Reservoir Development, investment is large, risk is high, and its expense accounts for more than 50% of cost of exploration & development.Breaking technique for rock is the core content of Oil & Gas Drilling Technology, and the quality of efficiency of breaking rock directly decides bit speed and cost, more decides the economic benefit of drilling engineering.Along with deepening continuously of China's oil-gas exploration and development, deep-well, ultra-deep well drilling quantity constantly increase.When well depth increases, the problem that bit speed is low, cost is high, the cycle is long is very outstanding, has had a strong impact on the exploration and development speed of whole oil gas field.Particularly deep formation rate of penetration is slow, and cause drilling period long, during drilling well, various engineering accident happens occasionally, and efficiency of construction is low.Analyze its reason to mainly contain: one, deep Jing Duan buries on stratum deeply, formation compaction effect is large, causes the intensity of rock own large, not easily broken; Two, along with the increase of well depth, in drill string, drilling fluid constantly increases along journey loss, thus cause the hydraulic energy of drill bit broken formation constantly to reduce, the available water-horse power of drill bit sharply declines, be difficult to the landwaste removing shaft bottom in time, there is shaft bottom bed course, cause landwaste and repeat fragmentation even bit balling, cause rate of penetration greatly to reduce; Three, for extended reach well or inclined shaft, when tubing string enters well, enter well length longer, frictional force between the tubing string that needs overcome and the borehole wall is larger, and the increase of frictional resistance reduces the available weight be delivered on drill bit, causes drill bit at the mechanical rock breaking energy wretched insufficiency in shaft bottom, bit teeth is difficult to wedging rock, broken rock mode is mainly to be ground to master, instead of volumetric fracture, thus have impact on the raising of rate of penetration.
The method of existing raising rate of penetration mainly comprises waterpower pulse method and cavitation jet method.Continuous stream by drill string is mainly modulated to pulsing jet by the Basic Mechanism of water conservancy pulse, thus improves bottom-hole flow field, improves bottom hole flushing and clear rock efficiency, reduces pressure holding and repeats broken; And the dominant mechanism of cavitation jet is incorporated in jet by powerful cavitation destruction, improve bottom hydraulic energy, thus improve the technology of deep drilling speed.But existing instrument all have employed wherein a kind of speed-raising mechanism, and cannot solve and drag pressure phenomenon in extended reach well.Therefore, develop and a kind ofly waterpower pulse can be transmitted to shaft bottom downwards and improve the stress of bottom rock in conjunction with cavitation effect, thus the purification of strengthening landwaste, and the pressure oscillation caused by hydraulic pulse is converted into and acts on drill bit impact load, form periodic the pressure of the drill, making drill bit while rotating, also have the drilling tool increasing the pressure of the drill and reduce vibrating effect, is an important directions of drilling speed.
Utility model content
The purpose of this utility model is exactly to overcome prior art Problems existing, there is provided a kind of improve deep layer bit hydraulic horsepower by the drilling fluid displacement reduced when creeping into and produce pulse cavitating jet, guarantee high flow rate washover and make full use of bit pressuredrop and improve the pressure of the drill simultaneously, play the drilling tool of jet drilling technology in the speed-raising effect of deep layer.
For achieving the above object, the utility model adopts following design scheme:
A kind of drilling tool is on the basis of impulse generator and drill bit combination drill well tool, connects a set of lifting sub above impulse generator.This lifting sub comprises spline urceolus, spline mandrel and anti-lost cylinder.Wherein, spline urceolus is tubular structure, and top and bottom are processed with screw thread respectively, and inside is processed with internal spline, is processed with the by-pass duct running through spline urceolus barrel between internal spline and threaded upper ends; Anti-lost cylinder is tubular structure, and upper end is processed with screw thread, and lower end has the step towards anti-lost cylinder internal protrusion; Spline mandrel external process has external splines, and bottom is processed with screw thread and is connected with impulse generator, is provided with evagination step above connection of thread; Impulse generator lower end is connected with drill bit; Spline mandrel and spline urceolus by spline joint, and can realize moment of torsion transmission and slide up and down; Spline mandrel moves up and down in spline urceolus, thus controls the switch of by-pass port.
Such scheme comprises further: spline mandrel upper end outer rim is processed with sealed groove, installs bypass sealing and guide ring; The extreme position that spline mandrel slides up and down is respectively by its evagination step and spline urceolus lower end and limit with the convex step of anti-lost cylinder; And ensure that bypass is sealed in the upper and lower laying respectively at spline urceolus by-pass duct when spline mandrel slides up and down extreme position.Described spline urceolus can adopt urceolus and lower urceolus to assemble; Described drill bit is provided with cavitating nozzle.
The utility model has the advantages that: (1) drilling tool structure is simple, can realize connection and the isolation of annular space inside and outside drill string easily; (2) small displacement drilling well can be realized, reduce cyclic pressure dissipation, fully improve water-horse power and the pulse cavitating jet impact force of drill bit, thus improve the rate of penetration of drilling well; (3) when bore hole annulus occurs that landwaste carries the problem such as bad, drilling tool bypass passageways can be opened easily, thus realize huge discharge circulation well cleanup; (4) being slidably connected of spline mandrel and spline housing, can make full use of bit pressuredrop, improve the pressure of the drill.
Accompanying drawing explanation
Fig. 1 is the structural representation that a kind of drilling tool by-pass duct of the utility model is in closed condition.
1. top drilling tools in figure, 2. bypass sealing, 3. by-pass port, 4. spline urceolus, 5. spline mandrel, 6. spline, 7. anti-lost cylinder, 8. impulse generator, 9. drill bit.
Detailed description of the invention
Be further described below in conjunction with accompanying drawing 1 pair of the utility model:
In accompanying drawing 1, a kind of drilling tool, comprises spline urceolus 4, spline mandrel 5, anti-lost cylinder 7 and impulse generator 8, drill bit 9.Spline urceolus 4 is in tubular structure, and top and bottom are processed with screw thread respectively, and inside is processed with internal spline, are processed with the by-pass duct 3 running through spline urceolus 4 barrel between internal spline and threaded upper ends; Anti-lost cylinder 7 is in tubular structure, and upper end is processed with screw thread, and lower end has the step towards anti-lost cylinder 7 internal protrusion; Spline mandrel 5 external process has external splines, and bottom is processed with screw thread and is connected with impulse generator 8, is provided with evagination step above connection of thread; Impulse generator 8 lower end is connected with drill bit 9; Spline mandrel 5 is connected by spline 6 with spline urceolus 4, and can realize moment of torsion transmission and slide up and down; Spline mandrel 5 drives bypass to seal 2 and moves up and down at spline urceolus 4, thus controls the switch of by-pass port 3.Described drill bit 9 is provided with cavitating nozzle.
Spline mandrel 5 upper end outer rim is processed with groove, bypass sealing 2 and guide ring are installed respectively, the extreme position that spline mandrel 5 moves up in the evagination step of spline mandrel 5 and contact position, spline urceolus 4 lower end, the evagination step of the extreme position that spline mandrel 5 moves down at spline mandrel 5 and the convex step contact position of anti-lost cylinder 7; Spline mandrel 5 and spline urceolus 4 seal 2 by bypass and realize radial fluid-tight seal; When the evagination step of spline mandrel 5 and spline urceolus 4 times end in contact, bypass sealing 2 is positioned at the top of the by-pass duct 3 of spline urceolus, prevents the fluid flowing through tool interior from being entered the space outerpace of spline urceolus by the by-pass duct of spline urceolus; When the evagination step of spline mandrel 5 contacts with the convex step of anti-lost cylinder 7, bypass sealing 2 is positioned at the bottom of the by-pass duct 3 of spline urceolus 4, and the fluid flowing through tool interior enters the space outerpace of spline urceolus 4 by the by-pass duct 3 of spline urceolus 4.Described spline urceolus 4 is preferably assembled by upper spline urceolus and lower spline urceolus two parts, when bore hole annulus occurs that landwaste carries the problem such as bad, can open drilling tool bypass passageways easily.
In drilling process, described drilling tool is connected to drill string and enters up and down in well-drilling borehole; When bit contact shaft bottom carries out creeping into operation, spline mandrel 5 drives bypass to seal 2 and moves up at spline urceolus 4, thus closes by-pass port 3, and drilling fluid flows through drilling tool, spline mandrel 5 inner space, impulse generator 8 and drill bit 9, then enters annular space;
When circulation well cleanup operation is carried out in drill bit lift-off shaft bottom, spline mandrel 5 drives bypass to seal 2 and moves down at spline urceolus (4), thus opens by-pass port 3, and drilling fluid flows through the by-pass port 3 of drilling tool, spline urceolus 4, then enters annular space.
The flow Q2 of drilling fluid when the flow Q1 of drilling fluid is less than circulation well cleanup in drilling process, Q1 value gets 2/3 of Q2 value.
Although illustrate and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and spirit, scope of the present utility model is by appended claim and equivalency thereof.
Claims (3)
1. a drilling tool, comprises impulse generator (8) and drill bit (9), it is characterized in that: be connected with lifting sub in the top of impulse generator (8); This lifting is short comprises spline urceolus (4), spline mandrel (5), anti-lost cylinder (7); Wherein, spline urceolus (4) is in tubular structure, and top and bottom are processed with screw thread respectively, and inside is processed with internal spline, is processed with the by-pass duct (3) running through spline urceolus (4) barrel between internal spline and threaded upper ends; Anti-lost cylinder (7) is in tubular structure, and upper end is processed with screw thread, and lower end has the step towards anti-lost cylinder (7) internal protrusion; Spline mandrel (5) external process has external splines, and bottom is processed with screw thread and is connected with impulse generator (8), is provided with evagination step above connection of thread; Impulse generator (8) lower end is connected with drill bit (9); Spline mandrel (5) is coordinated by spline (6) axial grafting with spline urceolus (4), realizes moment of torsion transmission and slides up and down.
2. drilling tool according to claim 1, is characterized in that: spline mandrel (5) upper end outer rim is processed with sealed groove, installs bypass sealing (2); The extreme position that spline mandrel (5) slides up and down is respectively by its evagination step and urceolus (4) lower end and limit with the convex step of anti-lost cylinder (7); Bypass sealing (2) lays respectively at the upper and lower of urceolus (1) by-pass duct (3) when spline mandrel (5) slides up and down extreme position.
3. drilling tool according to claim 1 and 2, is characterized in that: described urceolus (4) is assembled by upper urceolus and lower urceolus; Described drill bit (9) is provided with cavitating nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420701864.1U CN204326968U (en) | 2014-11-21 | 2014-11-21 | A kind of drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420701864.1U CN204326968U (en) | 2014-11-21 | 2014-11-21 | A kind of drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204326968U true CN204326968U (en) | 2015-05-13 |
Family
ID=53163340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420701864.1U Expired - Fee Related CN204326968U (en) | 2014-11-21 | 2014-11-21 | A kind of drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204326968U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672884A (en) * | 2014-11-21 | 2016-06-15 | 中石化胜利石油工程有限公司钻井工艺研究院 | Well-drilling tool and well-drilling method thereof |
| CN108533170A (en) * | 2018-03-27 | 2018-09-14 | 北京工业大学 | Pulse-percussion drilling tool |
-
2014
- 2014-11-21 CN CN201420701864.1U patent/CN204326968U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672884A (en) * | 2014-11-21 | 2016-06-15 | 中石化胜利石油工程有限公司钻井工艺研究院 | Well-drilling tool and well-drilling method thereof |
| CN108533170A (en) * | 2018-03-27 | 2018-09-14 | 北京工业大学 | Pulse-percussion drilling tool |
| CN108533170B (en) * | 2018-03-27 | 2019-06-07 | 北京工业大学 | Pulse-percussion drilling tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20201121 |