CN108252654A - A kind of casing drilling tool - Google Patents
A kind of casing drilling tool Download PDFInfo
- Publication number
- CN108252654A CN108252654A CN201810279134.XA CN201810279134A CN108252654A CN 108252654 A CN108252654 A CN 108252654A CN 201810279134 A CN201810279134 A CN 201810279134A CN 108252654 A CN108252654 A CN 108252654A
- Authority
- CN
- China
- Prior art keywords
- drilling tool
- rotor
- casing
- hole
- casing drilling
- 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.)
- Withdrawn
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 35
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 239000007779 soft material Substances 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
- E21B7/208—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes using down-hole drives
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The present invention provides a kind of casing drilling tools.Currently known casing drilling mode carrys out drive sleeve drill bit to carry out drillng operation for revoling tube drilling tool.The casing drilling tool of the present invention is mounted between casing and pipe bit, is rotated by cleaner for high-pressure drilling fluid come drive sleeve drilling tool and pipe bit.Casing drilling tool is made of motor assembly, driving-shaft assembly and connection parts etc., transmission shaft in rotor, driving-shaft assembly and connection parts in motor assembly are provided with through-hole along axis, the through-hole of rotor is blocked with a kind of soft material, ensures that highly pressurised liquid passes through from the working chamber of motor；The diameter of through-hole is more than the outer diameter of small drill bit, it is ensured that when slim-hole below is crept into, small drill bit can pass through.
Description
Technical field
The present invention relates to the structure types of casing drilling or setting of casing, especially casing drilling tool.
Background technology
A kind of currently known casing drilling technique is in lower end den bohrkopf einsetzen, and dynamic rotation is provided by ground installation
Casing carrys out the drilling that drive sleeve drill bit carries out big wellbore, and after being drilled big wellbore, casing and pipe bit are stayed in well.Then it changes
Upper drilling rod and the first-class tool of bradawl carry out the drilling of slim-hole, drill pipe bit before small drill bit enters slim-hole.
The shortcomings that casing drilling technique is：Since ground installation being needed to carry out drive sleeve rotation, ground installation can be caused
It is more complicated, increase operating cost；Simultaneously sleeve rotating when and wall friction, casing may be damaged.
Invention content
The technical problem to be solved by the present invention is to：Bit but casing does not rotate during drilling well；Drive the dress of bit
It puts and must be able to be drilled by small drill bit.
The present invention is for the technical solution taken of solution more than technical problem：
A kind of casing drilling tool is provided（Or it is hydraulic motor）, between casing and pipe bit, high pressure is passed through in casing
Liquid, the rotation of high pressure liquid drives casing drilling tool, and pipe bit rotation is driven to carry out drillng operation, in casing drilling tool and casing
Casing does not rotate when bit, avoids the friction of casing and the borehole wall in this way；Casing drilling tool is provided with logical on axis
Hole, the size of through-hole pass through between can guarantee small drill bit therefrom, in order to make to generate pressure difference between the entrance of casing drilling tool, use softwood
Material blocks the through-hole of casing drilling tool, which can easily be drilled by small drill bit.
The beneficial effects of the invention are as follows：
Ground installation does not need to drive sleeve rotation, reduces the complexity of ground installation；Casing and the borehole wall will not generate rotation
Turn friction, protect casing.
Description of the drawings
Fig. 1 is casing drilling tool motor schematic diagram of the present invention.
Fig. 2 is driving-shaft assembly schematic diagram of the present invention.
Fig. 3 is casing drilling tool connection parts schematic diagram of the present invention.
Fig. 4 is casing drilling tool schematic diagram of the present invention.
Specific embodiment
As shown in Figure 1, casing drilling tool motor（12）As the motor of common screw drilling tool, by stator and rotor（4）Group
Into.Stator is by stator tube（2）With stator rubber bushing（3）Composition, rubber bushing（3）Endoporus be inner helical surface.Rotor（4）'s
Male helicoid and rubber bushing（3）Inner helical surface formed seal line, can be by the inlet of motor（1）And leakage fluid dram（6）Isolation
It opens, when highly pressurised liquid enters motor inlet（1）When, it can drive rotor（4）Generate rotation and revolution.Rotor（4）Axis on
There are one through-holes（5）, through-hole（5）Diameter be more than the outer diameter of small drill bit and the sum of 2 times of eccentricity of rotors, it is ensured that below
When slim-hole is crept into, small drill bit can pass through.
As shown in Fig. 2, in driving-shaft assembly（19）Transmission shaft（10）Axis on there are one through-hole（11）, through-hole（11）
Diameter be more than small drill bit outer diameter, it is ensured that below slim-hole drilling when, small drill bit can pass through.
As shown in figure 3, connection parts are by driving lever disk（7）And thrust disc（8）Deng composition, thrust disc（8）Axis on have one
A through-hole（9）, through-hole（9）Diameter be more than the outer diameter of small drill bit and the sum of 2 times of eccentricity of rotors, it is ensured that The Small Well below
During eye drilling, small drill bit can pass through.As shown in figure 4, driving lever disk（7）With rotor（4）It is connected and does eccentric planet movement, push away
Power disk（8）With transmission shaft（10）It is connected and does System of Rotating about Fixed Axis.Driving lever disk（7）On have the cylinder of circle protrusion, thrust disc（8）It is corresponding
Position on have a circle circular hole, thrust disc（8）The diameter of circular hole is equal or slightly larger than the diameter and 2 times of rotors of driving lever disk cylinder
The sum of eccentricity, when driving lever disk（7）When making eccentric planet movement, driving lever disk（7）On cylinder be inserted into thrust disc（8）On circle
Pore area dynamicthrust disk（8）Make System of Rotating about Fixed Axis.Driving lever disk（7）End face and thrust disc（8）End face be in contact, by rotor（4）'s
Axial force transmission is to driving-shaft assembly（19）.Driving lever disk（7）It is made of soft material（Or driving lever disk respective rotor through-hole position
Material is very soft, can easily be drilled by small drill bit very much, not influence the drilling of following slim-hole）, by rotor（4）Through-hole（5）
It blocks, ensures that highly pressurised liquid passes through from the working chamber of motor；Thrust disc is provided with through-hole along axis, and the diameter of through-hole is more than small
The outer diameter of drill bit, it is ensured that when slim-hole below is crept into, small drill bit can pass through.
Claims (4)
1. a kind of casing drilling tool, it is characterised in that：It is made of motor assembly, driving-shaft assembly and connection parts etc., motor assembly
In rotor, the transmission shaft in driving-shaft assembly and connection parts be provided with through-hole along axis, with a kind of soft material by rotor
Through-hole is blocked.
2. casing drilling tool according to claim 1, it is characterised in that：Connection parts are made of driving lever disk and thrust disc, are dialled
Have the cylinder of circle protrusion on bar disk, there is a circle circular hole on the corresponding position of thrust disc, the diameter of thrust disc circular hole be equal to or
Slightly larger than the sum of the diameter of driving lever disk cylinder and 2 times of eccentricity of rotors, the end face of driving lever disk is in contact with the end face of thrust disc,
By the axial force transmission of rotor to driving-shaft assembly.
3. casing drilling tool according to claim 2, it is characterised in that：Driving lever disk is connected with rotor and does eccentric planet movement,
Thrust disc is connected with transmission shaft and does System of Rotating about Fixed Axis；Or thrust disc is connected with rotor and does eccentric planet movement, driving lever disk and transmission
Axis, which is connected, does System of Rotating about Fixed Axis.
4. casing drilling tool according to claim 3, it is characterised in that：The driving lever disk or thrust disc and rotor being connected with rotor
Between formed cylindrical surface sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810279134.XA CN108252654A (en) | 2018-04-02 | 2018-04-02 | A kind of casing drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810279134.XA CN108252654A (en) | 2018-04-02 | 2018-04-02 | A kind of casing drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108252654A true CN108252654A (en) | 2018-07-06 |
Family
ID=62747739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810279134.XA Withdrawn CN108252654A (en) | 2018-04-02 | 2018-04-02 | A kind of casing drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108252654A (en) |
-
2018
- 2018-04-02 CN CN201810279134.XA patent/CN108252654A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180706 |
|
| WW01 | Invention patent application withdrawn after publication |