CN104650512A - Positive displacement motor (PDM) drill stator manufactured by PTFE and PFA blend and fluorine-containing material applying PDM drill stator - Google Patents
Positive displacement motor (PDM) drill stator manufactured by PTFE and PFA blend and fluorine-containing material applying PDM drill stator Download PDFInfo
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- CN104650512A CN104650512A CN201410709674.9A CN201410709674A CN104650512A CN 104650512 A CN104650512 A CN 104650512A CN 201410709674 A CN201410709674 A CN 201410709674A CN 104650512 A CN104650512 A CN 104650512A
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- ptfe
- pfa
- stator
- blend
- drilling tool
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C2/00—Rotary-piston engines
- F03C2/08—Rotary-piston engines of intermeshing-engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Abstract
The invention relates to a positive displacement motor (PDM) drill stator manufactured by a PTFE and PFA blend. The PDM drill stator sequentially and mainly comprises a stator metal outer tube and a polymer layer from outside to inside, wherein the polymer layer is manufactured by the PTFE and PFA blend. According to the PDM drill stator, the PTFE and PFA blend has the advantages of good wear resistance, proper working temperature interval, good weather resistance, low friction coefficient and the like, so that the performances of a drill are effectively improved on factors of the working temperature interval, the wear rate and the like of the PDM drill stator, the service life of the PDM drill stator is greatly prolonged, the production cost and the maintenance cost are reduced, and the well drilling efficiency is improved.
Description
Technical field
The present invention relates to a kind of stator of helicoid hydraulic motor, particularly relate to a kind of use PTFE and PFA blend to make screw drilling tool stator and fluorine material.
Background technology
Helicoid hydraulic motor is a kind of is power with drilling fluid, liquid pressure can be transferred to the positive displacement mud motor of mechanical energy.It is generally made up of a few part of by-pass valve, screw motor, universal joint, bearing and drive shaft, and its core is screw motor.And screw motor is made up of stators and rotators.In prior art, as shown in Figure 1, stator comprises the housing 100 of cast and mates the rubber bushing 201 be close-coupled in inner walls, the inwall of shown cast housing 100 is provided with the thread groove of indent, described thread groove is provided with at least 3 and is disposed in parallel in inner walls 100, the hand of spiral of described thread groove is all consistent and with stator center axle for its hand of spiral stretching, extension axle, described rubber bushing 201 by high-pressure injection, is mated in shape of threads and with housing 100 and is connected on the inwall of housing 100.
Owing to the tubular outer casing inwall of stator in prior art being provided with the thread groove of indent, therefore, tubular outer casing processing technology difficulty is high, complex forming technology, and produces more processing clout, greatly increases tooling cost.In addition, rubber bushing is by high-pressure injection on the inwall of housing, and moulding process is also very complicated, and tooling cost is high, and efficiency is low.And the rubber bushing material of helicoid hydraulic motor is generally NBR and HNBR in prior art, wherein, the ultimate temperature (static state) of HNBR is 176 DEG C, but the long-term temperature of hot hole is close to 170 DEG C, according to the performance characteristics of helicoid hydraulic motor, temperature is easy to the part concentrating on rubber bushing and rotor contact, the dynamic heat build up mutually extrude between stator and rotor, reversed.When temperature is higher and concentrate on above region for a long time, then rubber bushing will be caused aging, thus cause rubber failure.Therefore, in general more than 100 hours of the work-ing life of helicoid hydraulic motor of hot hole, life cycle is short, and maintenance requirement is high, have impact on the efficiency of drilling well work and carries out progress, adding drilling cost.
In order to solve the problems referred to above that in prior art, helicoid hydraulic motor exists, step up resistance to wear resistant to elevated temperatures resilient material and the reliable bearing arrangement of manufacture and exploit for the manufacture of stator, thus the working life of screw drill is significantly improved, develop low-speed big screw rod to be applicable to the key breakthrough direction that drilling deep hole and superdeep holes are also this areas simultaneously.
Stator common in prior art, stator material is HNBR.
Product in embodiment of the present invention 1-4 and comparative example is carried out performance test, and test result is as shown in table 1.
Table 1: the product performance test result of the embodiment of the present invention and comparative example
As known from Table 1, the product that obtains of the present invention in every respect performance be all better than comparative example.
Summary of the invention
For solving the problem, the invention discloses the screw drilling tool stator of a kind of PTFE of use and the making of PFA blend and be applied to PTFE and the PFA blend of this stator, by utilizing, PTFE and PFA blend is interval in wear resistance, working temperature, good weatherability and frictional coefficient low etc. in advantage, thus it is interval and in wear rate etc., effectively improve the performance of drilling tool in the working temperature of screw drilling tool stator, thus greatly extend the work-ing life of screw drilling tool stator, reduce production maintenance cost, improve drilling efficiency.
The screw drilling tool stator that use PTFE and PFA blend disclosed by the invention makes, be mainly stator metal outer pipe, polymer layer successively from outside to inside, polymer layer adopts PTFE and PFA blend to make.PTFE and PFA blend is utilized to prepare the polymer layer of stator in the present invention program, in screw drilling tool stator, use fluorine material breakthroughly, thus make screw drilling tool stator have the performances such as better high-low temperature resistant, wear-resistant, ageing-resistant, frictional coefficient is low, production operation temperature is high, wear rate is low, thus greatly extend the work-ing life of stator, reduce the maintenance cost of equipment.
Preferred as one, polymer layer inwall or outer wall are provided with the thread groove of indent, thread groove is provided with at least 1 and is arranged on side by side on the wall of polymer layer, and the hand of spiral of thread groove is all consistent and with stator center axle for its hand of spiral stretching, extension axle.This programme can arrange thread groove structure on the inwall of stator or on outer wall or on inwall and outer wall, can match identical with the corresponding thread groove arranged on stator metal outer pipe inwall by the thread groove structure that outer wall is arranged, play and fix more stable effect with stator metal outer pipe, stator structure stability can be improved, increase the service life, simultaneously according to the needs of production and application, the quantity of setting thread groove, be uniformly distributed on wall or uneven distribution or be closely adjacent to arrange on wall partly, the structure of stator is made to have larger handiness, stator can according to rotor power, the parameter of the aspects such as torque comes arrangement and the design of actual selection thread groove.
Preferred as one, thread groove is adjacent to be arranged on whole polymer layer inwall or outer wall side by side.In this programme, thread groove is arranged on the inwall of whole polymer layer or the surface of outer wall with the mode spiral of or arranged side by side many, thus make stator to the torque power more stable and uniform of rotor, avoid in production operation process, because of unbalance stress, equipment is caused damage, thus can work-ing life of extension device, reduce production cost.
PTFE and the PFA blend being applied to screw drilling tool stator disclosed by the invention, comprise PTFE, PFA and additive, described additive comprises fortifying fibre and nano inorganic powder, and described each component composition (with weight parts) is: PTFE and PFA blend 100 parts, additive 15-30 part.
PTFE and the PFA blend that the present invention is applied to screw drilling tool stator is made, and wherein, PFA, density is 2.13-2.16g/cm
3, be a kind of fluoroplastics of melt-processable, chemical property is similar to PTFE with FEP, but FEP can only use below 200 DEG C, PTFE can not injection moulding, and the life-time service temperature of PFA is-80 ~ 260 DEG C, and also has frictional coefficient lower in plastics and remarkable chemical resistance.And the density of PTFE is 2.1-2.3g/cm
3, mechanical properties is softer, and surface energy is low, has the use properties such as high-low temperature resistant, corrosion-resistant, weather, low-friction coefficient, high lubrication.PTFE and PFA blend is applied to screw drilling tool stator by the present invention, thus the deformation be effectively reduced in life-time service and loss, improve the tolerance of stator to environmental factorss such as drilling well high temperature, high humidity, corrodibility, thus greatly extend the work-ing life of stator-device, reduce the operation and maintenance cost of helicoid hydraulic motor and stator thereof, and improve the efficiency of production.
In addition, be also added with additive in PTFE and PFA blend of the present invention, additive is made up of fortifying fibre and nano inorganic powder.Wherein, fortifying fibre on the basis ensureing the processing characteristics that blend is original, can increase substantially the physical and mechanical property of blend matrix, improves the performances such as the dimensional stability of blend, thermotolerance, wear resistance simultaneously, reduce costs.And nano inorganic powder has good plasticity and toughness, its intensity and hardness are also apparently higher than other material, by fortifying fibre and the composite filling of nano inorganic powder PTFE and PFA blend of the present invention, the over-all propertieies such as the intensity of blend, hardness, thermotolerance can be significantly improved.And through the present invention research draw, the wear resistance of the goods of invention blend and the intensity of goods linear, intensity is higher, and wear resistance is better.
Preferred as one, in PTFE and PFA blend, PTFE accounts for 20-40%, and PFA accounts for 60-80%.
Preferred as one, in described additive, the weight ratio of fortifying fibre and nano inorganic powder is (3-5): 1.Because nano inorganic powder is just as PTFE and PFA blend auxiliary reinforcement, its content there will be agglomeration when exceeding certain limit, affect dispersion effect, the mechanical property of PTFE and PFA blend and friction and wear behavior is caused to occur situation about declining, therefore, when additive of the present invention is in above-mentioned weight ratio, produce synergistic function between fortifying fibre and metal-powder, the intensity that goods are final and wear resistance are highly improved.
As one preferably, described fortifying fibre is one or more in carbon fiber, glass fibre, boron fibre, aramid fiber, trevira, nylon fiber, polyimide fiber.The diameter of fortifying fibre is 8-15 μm, and length-to-diameter ratio is (50-100): 1.
Fortifying fibre of the present invention preferably first adopts surface-modifying agent to carry out surface modification further, and it is the rare-earth modifier of 0.1-0.5% and the coupling agent of 2-5% that described surface-modifying agent comprises rare earth concentration.Fortifying fibre is preferably inserted in the surface-modifying agent be configured to according to the above ratio and is infiltrated 1-3h by modified technique at normal temperatures, at 80-120 DEG C, then dries 3-4h obtain.Coupling agent and rare earth treating agent all can improve the surface property of fortifying fibre, improve the surfactivity of fortifying fibre, so that improve Interface adhesive strength between fortifying fibre and blend matrix, fortifying fibre is not easily departed from from blend matrix, prevent the transfer of blend matrix, the generation decreasing goods fatigue cracking and peel off, reduces the wearing and tearing of goods.
Preferred as one, described nano inorganic powder is Al
2o
3, TiO
2, SiO
2, AlN, Si
3n
4in one or more.The particle diameter of the further preferably nano inorganic ion of the present invention is 40-60nm.
The screw drilling tool stator that the present invention makes by adopting PTFE and PFA blend, the stator tool making drilling tool and apply this drilling tool has the following advantages:
High temperature resistant---use working temperature to reach 260 DEG C.
Low temperature resistant---there is good mechanical tenacity.
Corrosion-resistant---to most of pharmaceutical chemicals and solvent, show inertia, energy strong alkali-acid resistance, water and various organic solvent.
Weather---there is aging life-span best in plastics.
High lubrication---frictional coefficient is low.
Do not adhere to---be surface tension minimum in solid material, do not adhere to any material.
Screw drilling tool stator can be met preferably at the right high request of subterranean well environment.
Compared with prior art, the present invention has following advantage:
1. PTFE and PFA blend life-time service temperature disclosed by the invention is more than 200 DEG C, and time more than 250 DEG C, still has good Practical Performance, is greatly better than stator current phase material NBR and HNBR.
2. PTFE and PFA blend of the present invention has excellent wear resistance and creep resistance, has less compression set, better rebound resilience than PTFE.
3. the present invention adopts additive to carry out enhancing modified to PTFE and PFA blend, and make that its intensity is higher, frictional coefficient is less, rebound resilience is better, the performance such as erosion resistance and high thermal resistance is more superior, work-ing life is more of a specified duration.
4. the long-term corrosion of the stator ability drilling fluid of helicoid hydraulic motor of the present invention, strong alkali-acid resistance.
5. more than 250h can be increased to exceed the work-ing life of the stator of helicoid hydraulic motor of the present invention.
6. the stator of helicoid hydraulic motor of the present invention can be shaping with general expressing technique, and processibility is good, and complete processing is simple, greatly cuts down finished cost.
Accompanying drawing explanation
The structural representation of a kind of embodiment of Fig. 1, stator disclosed by the invention;
The front view (polymer layer is uniform thickness not) of a kind of embodiment of Fig. 2, stator disclosed by the invention;
The front view (polymer layer uniform thickness) of the another kind of embodiment of Fig. 3, stator disclosed by the invention.
Reference numerals list:
1, stator metal outer pipe; 2, polymer layer; 3, rotor.
Embodiment
Be below specific embodiments of the invention, and accompanying drawings is further described technical scheme of the present invention, but the present invention is not limited to these embodiments.
The screw drilling tool stator that use PTFE and PFA blend disclosed by the invention makes, be mainly stator metal outer pipe 1, polymer layer 2 from outside to inside successively, polymer layer adopts PTFE and PFA blend to make.
Preferred as one, polymer layer 2 inwall or outer wall are provided with the thread groove of indent, thread groove is provided with at least 1 and is arranged on side by side on the wall of polymer layer, and the hand of spiral of thread groove is all consistent and with stator center axle for its hand of spiral stretching, extension axle.
Preferred as one, thread groove is adjacent to be arranged on whole polymer layer 2 inwall or outer wall side by side.
PTFE and the PFA blend being applied to screw drilling tool stator disclosed by the invention, comprise PTFE, PFA and additive, additive comprises fortifying fibre and metal-powder, and each component composition (with weight parts) is: PTFE and PFA blend 100 parts, additive 15-30 part.
Preferred as one, in PTFE and PFA blend, PTFE accounts for 20-40%, and PFA accounts for 60-80%.
Preferred as one, the weight ratio of fortifying fibre and metal-powder is (3-5): 1.
As one preferably, fortifying fibre is one or more in carbon fiber, glass fibre, boron fibre, aramid fiber, trevira, nylon fiber, polyimide fiber.
Preferred as one, the diameter of fortifying fibre is 8-15 μm, and length-to-diameter ratio is (50-100): 1.
Preferred as one, nano inorganic powder is Al
2o
3, TiO
2, SiO
2, AlN, Si
3n
4in one or more.
Preferred as one, the particle diameter of nano inorganic ion is 40-60nm.
Preferred as one, fortifying fibre first adopts surface-modifying agent to carry out surface modification.
Preferred as one, it is the rare-earth modifier of 0.1-0.5% and the coupling agent of 2-5% that surface-modifying agent comprises rare earth concentration.
Preferred as one, modified technique is inserted at normal temperatures by fortifying fibre in the surface-modifying agent that is configured to according to the above ratio to infiltrate 1-3h, then at 80-120 DEG C, dries 3-4h.
Embodiment 1:
The each component of the present embodiment (with weight parts) consists of: PTFE and PFA blend 100 parts, and PTFE accounts for 20%, PFA and accounts for 80%; Additive 15 parts is 10 μm by diameter, and length-to-diameter ratio is the carbon fiber of 80:1 and particle diameter is the Al of 40-60nm
2o
3mix by weight for 4:1.Carbon fiber is the modification of drying 3h after surface-modifying agent that the rare-earth modifier of 0.1% and the coupling agent of 2% are configured to infiltrates 3h at normal temperatures at 80 DEG C through rare earth concentration.
During production, PFA, PTFE and additive after high speed muller mixes, then are powder through melting extruding pelletization, then by extrude or the mode such as injection moulding or die casting is shaping obtains wherein that a kind of application structure is as Figure 1-3.
Embodiment 2:
The each component of the present embodiment (with weight parts) consists of: PTFE and PFA blend 100 parts, and PTFE accounts for 30%, PFA and accounts for 70%; Additive 20 parts is 10 μm by diameter, and length-to-diameter ratio is the glass fibre of 80:1 and particle diameter is the TiO of 40-60nm
2mix by weight for 4:1.Glass fibre is the modification of drying 4h after surface-modifying agent that the rare-earth modifier of 0.2% and the coupling agent of 3% are configured to infiltrates 2h at normal temperatures at 90 DEG C through rare earth concentration.
During production, PFA, PTFE and additive after high speed muller mixes, then are powder through melting extruding pelletization, then by extrude or the mode such as injection moulding or die casting is shaping obtains wherein that a kind of application structure is as Figure 1-3.
Embodiment 3:
The each component of the present embodiment (with weight parts) consists of: PTFE and PFA blend 100 parts, and PTFE accounts for 35%, PFA and accounts for 65%; Additive 25 parts is 10 μm by diameter, and length-to-diameter ratio is the boron fibre of 80:1 and particle diameter is the SiO of 40-60nm
2mix by weight for 4:1.Boron fibre is the modification of drying 4h after surface-modifying agent that the rare-earth modifier of 0.3% and the coupling agent of 4% are configured to infiltrates 2h at normal temperatures at 100 DEG C through rare earth concentration.
During production, PFA, PTFE and additive after high speed muller mixes, then are powder through melting extruding pelletization, then by extrude or the mode such as injection moulding or die casting is shaping obtains wherein that a kind of application structure is as Figure 1-3.
Embodiment 4:
The each component of the present embodiment (with weight parts) consists of: PTFE and PFA blend 100 parts, and PTFE accounts for 40%, PFA and accounts for 60%; Additive 30 parts is 10 μm by diameter, and the AlN of length-to-diameter ratio to be the aramid fiber of 80:1 and particle diameter be 40-60nm mixes by weight for 4:1.Aramid fiber is the modification of drying 3h after surface-modifying agent that the rare-earth modifier of 0.5% and the coupling agent of 5% are configured to infiltrates 1h at normal temperatures at 120 DEG C through rare earth concentration.
During production, PFA, PTFE and additive after high speed muller mixes, then are powder through melting extruding pelletization, then by extrude or the mode such as injection moulding or die casting is shaping obtains wherein that a kind of application structure is as Figure 1-3.
Comparative example:
The difference of embodiment 5-8 and embodiment 1-4 is only that the fortifying fibre in reinforcing filler is trevira.
The difference of embodiment 9-12 and embodiment 1-4 is only that the fortifying fibre in reinforcing filler is nylon fiber.
The difference of embodiment 13-16 and embodiment 1-4 is only that the fortifying fibre in reinforcing filler is polyimide fiber.
The difference of embodiment 17-20 and embodiment 1-4 is only that the nano inorganic powder in reinforcing filler is nano Si
3n
4.
Embodiment 21-24 and the difference of embodiment 1-4 to be only in reinforcing filler fortifying fibre by carbon fiber and glass fibre by arbitrarily than forming.
Embodiment 25-28 and the difference of embodiment 1-4 to be only in reinforcing filler fortifying fibre by glass fibre with aramid fiber by arbitrarily than forming.
The difference of embodiment 29-32 and embodiment 1-4 is only that in reinforcing filler, nano inorganic powder is by Al
2o
3with Si
3n
4by any than composition.
The difference of embodiment 33-36 and embodiment 1-4 is only that in reinforcing filler, nano inorganic powder is by SiO
2press arbitrarily than forming with AlN.
The difference of embodiment 37-40 and embodiment 1-4 is only that in reinforcing filler, nano inorganic powder is by Al
2o
3, SiO
2with Si
3n
4by any than composition.
The difference of embodiment 41-44 and embodiment 1-4 is only that the diameter of the fortifying fibre in reinforcing filler is 8 μm, and length-to-diameter ratio is 50:1.
The difference of embodiment 45-48 and embodiment 1-4 is only that the diameter of the fortifying fibre in reinforcing filler is 8 μm, and length-to-diameter ratio is 80:1.
The difference of embodiment 49-52 and embodiment 1-4 is only that the diameter of the fortifying fibre in reinforcing filler is 8 μm, and length-to-diameter ratio is 100:1.
The difference of embodiment 53-56 and embodiment 1-4 is only that the diameter of the fortifying fibre in reinforcing filler is 10 μm, and length-to-diameter ratio is 50:1.
The difference of embodiment 57-60 and embodiment 1-4 is only that the diameter of the fortifying fibre in reinforcing filler is 10 μm, and length-to-diameter ratio is 100:1.
The difference of embodiment 61-64 and embodiment 1-4 is only that the diameter of the fortifying fibre in reinforcing filler is 15 μm, and length-to-diameter ratio is 50:1.
The difference of embodiment 65-68 and embodiment 1-4 is only that the diameter of the fortifying fibre in reinforcing filler is 15 μm, and length-to-diameter ratio is 80:1.
The difference of embodiment 69-72 and embodiment 1-4 is only that the diameter of the fortifying fibre in reinforcing filler is 15 μm, and length-to-diameter ratio is 100:1.
The difference of embodiment 73-76 and embodiment 1-4 is only that the weight ratio of fortifying fibre fortifying fibre and metal-powder in additive is 3:1.
The difference of embodiment 77-80 and embodiment 1-4 is only that the weight ratio of fortifying fibre fortifying fibre and metal-powder in additive is 5:1.
In view of the present invention program's embodiment is numerous, each embodiment experimental data is huge numerous, be not suitable for particularize explanation herein, but the content of the required checking of each embodiment is all close with the final conclusion obtained, so do not illustrate one by one the checking content of each embodiment, only with embodiment 1-4, the excellent part of the present patent application is representatively described herein.
The non-limit part of technical scope mid point value that this place embodiment is protected application claims, equally all in the scope of protection of present invention.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Although made a detailed description the present invention and quoted some specific embodiments as proof, to those skilled in the art, only otherwise it is obvious for leaving that the spirit and scope of the present invention can make various changes or revise.
Claims (8)
1. use the screw drilling tool stator that PTFE and PFA blend makes, be mainly stator metal outer pipe, polymer layer successively from outside to inside, it is characterized in that, described polymer layer adopts PTFE and PFA blend to make.
2. the screw drilling tool stator of use PTFE and PFA blend according to claim 1 making, it is characterized in that, described polymer layer inwall or outer wall are provided with the thread groove of indent, described thread groove is provided with at least 1 and is arranged on side by side on the wall of polymer layer, and the hand of spiral of described thread groove is all consistent and with stator center axle for its hand of spiral stretching, extension axle.
3. the screw drilling tool stator of use PTFE and PFA blend according to claim 1 making, it is characterized in that, described thread groove is adjacent to be arranged on whole polymer layer inwall or outer wall side by side.
4. one kind is applied to PTFE and the PFA blend of screw drilling tool stator, it is characterized in that, comprise PTFE, PFA and additive, described additive comprises fortifying fibre and nano inorganic powder, and described each component composition (with weight parts) is: PTFE and PFA blend 100 parts, additive 15-30 part.
5. a kind of PTFE and PFA blend being applied to screw drilling tool stator according to claim 4, it is characterized in that, in PTFE and PFA blend, PTFE accounts for 20-40%, and PFA accounts for 60-80%.
6. a kind of PTFE and PFA blend being applied to screw drilling tool stator according to claim 4, it is characterized in that, in described additive, the weight ratio of fortifying fibre and nano inorganic powder is (3-5): 1.
7. a kind of PTFE and the PFA blend being applied to screw drilling tool stator according to claim 4 or 6, it is characterized in that, described fortifying fibre is one or more in carbon fiber, glass fibre, boron fibre, aramid fiber, trevira, nylon fiber, polyimide fiber.
8. a kind of PTFE and the PFA blend being applied to screw drilling tool stator according to claim 4 or 6, it is characterized in that, described nano inorganic powder is Al
2o
3, TiO
2, SiO
2, AlN, Si
3n
4in one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410709674.9A CN104650512B (en) | 2014-11-28 | 2014-11-28 | A kind of screw drilling tool stator made using PTFE and PFA blends and the fluorine material applied to the stator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410709674.9A CN104650512B (en) | 2014-11-28 | 2014-11-28 | A kind of screw drilling tool stator made using PTFE and PFA blends and the fluorine material applied to the stator |
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| CN104650512B CN104650512B (en) | 2018-01-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107379670A (en) * | 2017-07-12 | 2017-11-24 | 明阳科技（苏州）股份有限公司 | Three layers of composite thick film self-lubricating bearing material |
| CN109373060A (en) * | 2018-12-25 | 2019-02-22 | 浙江鸿盛环保科技集团有限公司 | A kind of high intensity PFA multiple tube and preparation method thereof |
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| CN107379670A (en) * | 2017-07-12 | 2017-11-24 | 明阳科技（苏州）股份有限公司 | Three layers of composite thick film self-lubricating bearing material |
| CN109373060A (en) * | 2018-12-25 | 2019-02-22 | 浙江鸿盛环保科技集团有限公司 | A kind of high intensity PFA multiple tube and preparation method thereof |
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| CN104650512B (en) | 2018-01-09 |
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