CN104712494A - Screw drilling tool stator prepared from blend of PTFE and FEP, and fluorine-containing material applied to stator - Google Patents
Screw drilling tool stator prepared from blend of PTFE and FEP, and fluorine-containing material applied to stator Download PDFInfo
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- CN104712494A CN104712494A CN201410712265.4A CN201410712265A CN104712494A CN 104712494 A CN104712494 A CN 104712494A CN 201410712265 A CN201410712265 A CN 201410712265A CN 104712494 A CN104712494 A CN 104712494A
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- 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
- C08L27/18—Homopolymers or copolymers or tetrafluoroethene
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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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- 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 screw drilling tool stator prepared from a blend of PTFE and FEP. The stator mainly comprises, from exterior to interior, an outer metal tube and a polymer layer, wherein the polymer layer is prepared from the blend of PTFE and FEP. In virtue of the advantages of good wear resistance, operating temperature range and weatherability, low friction coefficient and the like of the blend of PTFE and FEP, the performance of a drilling tool is effectively improved in the aspects of operating temperature range, wear rate and the like of the screw drilling tool stator, so the service life of the screw drilling tool stator is greatly prolonged, productive maintenance cost is reduced, and 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 FEP blend to make screw drilling tool stator and fluorine material.
Background technique
Helicoid hydraulic motor is a kind of is power with drilling fluid, fluid pressure can be transferred to the positive displacement mud motor of mechanical energy.It is generally made up of a few part of bypass valve, screw motor, universal joint, bearing and live axle, 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 technique difficulty is high, complex forming technology, and produces more processing clout, greatly increases processing cost.In addition, rubber bushing is by high-pressure injection on the inwall of housing, and moulding process is also very complicated, and processing 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 limiting temperature (static state) of HNBR is 176 DEG C, but the long-term temperature of high temperature well is close to 170 DEG C, according to the performance characteristic 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 working life of helicoid hydraulic motor of high temperature well, 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 elastic material and the reliable bearing arrangement of manufacture and exploit for the manufacture of stator, thus the operating 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 related domains 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 testing property, 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 FEP blend and be applied to PTFE and the FEP blend of this stator, by utilizing, PTFE and FEP blend is interval in wear resistance, operating temperature, good weatherability and friction factor low etc. in advantage, thus it is interval and in wear rate etc., effectively improve the performance of drilling tool in the operating temperature of screw drilling tool stator, thus greatly extend the working life of screw drilling tool stator, reduce production maintenance cost, improve drilling efficiency.
The screw drilling tool stator that use PTFE and FEP blend disclosed by the invention makes, be mainly stator metal outer pipe, polymeric layer successively from outside to inside, polymeric layer adopts PTFE and FEP blend to make.PTFE and FEP blend is utilized to prepare the polymeric layer of stator in the present invention program, in screw drilling tool stator, use fluorine material breakthroughly, thus make screw drilling tool stator have better wear resistance, flame retarding and resistance to high temperature, manufacturing operation temperature is high, wear rate is low, thus greatly extend the working life of stator, reduce the maintenance cost of equipment.
Preferred as one, polymeric 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 polymeric 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 flexibility, 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 polymeric layer inwall or outer wall side by side.In this programme, thread groove is arranged on the inwall of whole polymeric 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 manufacturing operation process, because of unbalance stress, equipment is caused damage, thus can working life of extension device, reduce cost of production.
PTFE and the FEP blend being applied to screw drilling tool stator disclosed by the invention, comprise PTFE, FEP and additive, described additive comprises reinforcing fiber and metallic dust, and described each component composition (with weight parts) is: PTFE and FEP blend 100 parts, additive 10-30 part.
PTFE and the FEP blend that the present invention is applied to screw drilling tool stator is made, and wherein, FEP watery fusion point is 580F, and density is 2.15g/cm
3, be a kind of soft plastic, its tensile strength, wear resistance, creep resistance lower than many engineering plastics, and also possess the diffusion of not igniting, can stop flame, the features such as weatherability is excellent, and friction factor is lower.And the density of PTFE is 2.1-2.3g/cm
3, mechanical property is softer, and surface energy is low, has the usability such as high-low temperature resistant, corrosion-resistant, weatherability, low coefficient of friction, high lubrication.PTFE and FEP blend is applied to screw drilling tool stator by the present invention, thus the deformation be effectively reduced in Long-Time Service and loss, improve the tolerance of stator to environmental factors such as drilling well high temperature, high humidity, corrosivity, thus greatly extend the working 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 FEP blend of the present invention, additive is made up of reinforcing fiber and metallic dust.Wherein, reinforcing fiber on the basis ensureing the processibility 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, heat resistance, wear resistance simultaneously, reduce costs.And metallic dust can improve the performance such as thermal conductivity, rigidity, intensity, hardness, heat resistance, wearability of matrix, by reinforcing fiber and the composite filling of metallic dust PTFE and FEP blend of the present invention, the combination properties such as the intensity of blend, hardness, heat resistance 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 FEP blend, PTFE accounts for 70-90%, and FEP accounts for 10-30%.
Preferred as one, the weight ratio of described reinforcing fiber and metallic dust is (1.5-2.5): 1.When additive is in above-mentioned weight ratio, due to the synergistic impact between reinforcing fiber and metallic dust, the intensity that goods are final and wear resistance are highly improved.
As one preferably, described reinforcing fiber is one or more in carbon fiber, glass fibre, boron fiber, aramid fibre, polyester fibre, nylon fiber, polyimide fiber.The diameter of reinforcing fiber is preferably 10-20 μm, and slenderness ratio is (100-200): 1.
Reinforcing fiber of the present invention preferably first adopts surface modifier 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 modifier comprises rare earth concentration.Reinforcing fiber is preferably inserted in the surface modifier 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 reinforcing fiber, improve the surface activity of reinforcing fiber, so that improve Interface adhesive strength between reinforcing fiber and blend matrix, reinforcing fiber is not easily departed from from blend matrix, prevent the transfer of blend matrix, the generation decreasing goods fatigue crack and peel off, reduces the wearing and tearing of goods.
As one preferably, described metallic dust is one or more in copper powder, iron powder, tungsten powder, titanium valve, aluminium powder, lead powder.The present invention is preferred to be further made up of two kinds and above metallic dust, mass ratio be arbitrarily than.And the particle diameter of preferable alloy powder is less than 0.3 μm.
The screw drilling tool stator that the present invention makes by adopting PTFE and FEP blend, the stator tool making drilling tool and apply this drilling tool has the following advantages:
High temperature resistant---use operating temperature to reach 250 DEG C.
Low temperature resistant---there is good mechanical tenacity; Namely drop temperature to-196 DEG C, also can keep the elongation percentage of 5%.
Corrosion-resistant---to most of chemicals and solvent, show inertia, energy strong alkali-acid resistance, water and various organic solvent.
Weatherability---there is aging life-span best in plastics.
High lubrication---be friction factor the lowest in solid material.
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 FEP blend Long-Time Service temperature disclosed by the invention is more than 200 DEG C, and time more than 250 DEG C, still has good practicability, is greatly better than stator current phase material NBR and HNBR.
2. PTFE and FEP blend of the present invention has excellent wear resistance and creep resistance, has less compression set, better rebound elasticity than PTFE.
3. the present invention adopts reinforcing filler to carry out enhancing modification to PTFE and FEP blend, and make that its intensity is higher, friction factor is less, rebound elasticity is better, the performance such as corrosion resistance and heat-resisting quantity is more superior, working 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 working 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 processability is good, and processing technology 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 plan view (polymeric layer is uniform thickness not) of a kind of embodiment of Fig. 2, stator disclosed by the invention;
The plan view (polymeric 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, polymeric layer; 3, rotor.
Embodiment
Be below specific embodiments of the invention, and accompanying drawings is further described technological scheme of the present invention, but the present invention is not limited to these embodiments.
The screw drilling tool stator that use PTFE and FEP blend disclosed by the invention makes, be mainly stator metal outer pipe 1, polymeric layer 2 from outside to inside successively, polymeric layer adopts PTFE and FEP blend to make.
Preferred as one, polymeric 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 polymeric 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 polymeric layer 2 inwall or outer wall side by side.
PTFE and the FEP blend being applied to screw drilling tool stator disclosed by the invention, comprise PTFE, FEP and additive, additive comprises reinforcing fiber and metallic dust, and each component composition (with weight parts) is: PTFE and FEP blend 100 parts, additive 10-30 part.
Preferred as one, in PTFE and FEP blend, PTFE accounts for 70-90%, and FEP accounts for 10-30%.
Preferred as one, the weight ratio of reinforcing fiber and metallic dust is (1.5-2.5): 1.
As one preferably, reinforcing fiber is one or more in carbon fiber, glass fibre, boron fiber, aramid fibre, polyester fibre, nylon fiber, polyimide fiber.
Preferred as one, the diameter of reinforcing fiber is 10-20 μm, and slenderness ratio is (100-200): 1.
As one preferably, metallic dust is one or more in copper powder, iron powder, tungsten powder, titanium valve, aluminium powder, lead powder.
Preferred as one, the particle diameter of metallic dust is less than 0.3 μm.
Preferred as one, reinforcing fiber first adopts surface modifier 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 modifier comprises rare earth concentration.
Preferred as one, modified technique is inserted at normal temperatures by reinforcing fiber in the surface modifier 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 FEP blend 100 parts, and PTFE accounts for 90%, FEP and accounts for 10%; Additive 10 parts is 15 μm by diameter, and slenderness ratio is that the copper powder that the carbon fiber of 150:1 and particle diameter are less than 0.3 μm mixes by weight for 2:1.Carbon fiber is the modification of drying 3h after surface modifier 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, FEP, 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 FEP blend 100 parts, and PTFE accounts for 80%, FEP and accounts for 20%; Additive 10 parts is 15 μm by diameter, and slenderness ratio is that the glass fibre of 150:1 and particle diameter are less than the copper powder of 0.3 μm and iron powder mixes by weight for 2:1.Glass fibre is the modification of drying 4h after surface modifier 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, FEP, 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 FEP blend 100 parts, and PTFE accounts for 75%, FEP and accounts for 25%; Additive 10 parts is 15 μm by diameter, and slenderness ratio is that the boron fiber of 150:1 and particle diameter are less than the copper powder of 0.3 μm and tungsten powder mixes by weight for 2:1.Boron fiber is the modification of drying 4h after surface modifier 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, FEP, 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 FEP blend 100 parts, and PTFE accounts for 70%, FEP and accounts for 30%; Additive 10 parts is 15 μm by diameter, and slenderness ratio is that copper powder, iron powder and the lead powder that the aramid fibre of 150:1 and particle diameter are less than 0.3 μm mixes by weight for 2:1.Aramid fibre is the modification of drying 3h after surface modifier 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, FEP, 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 reinforcing fiber in reinforcing filler is polyester fibre.
The difference of embodiment 9-12 and embodiment 1-4 is only that the reinforcing fiber in reinforcing filler is nylon fiber.
The difference of embodiment 13-16 and embodiment 1-4 is only that the reinforcing fiber in reinforcing filler is polyimide fiber.
The difference of embodiment 17-20 and embodiment 1-4 is only that the metallic dust in reinforcing filler is titanium valve.
The difference of embodiment 21-24 and embodiment 1-4 is only that the metallic dust in reinforcing filler is made up of tungsten powder and titanium valve.
The difference of embodiment 25-28 and embodiment 1-4 is only that the metallic dust in reinforcing filler is made up of copper powder and aluminium powder.
The difference of embodiment 29-32 and embodiment 1-4 is only that the metallic dust in reinforcing filler is made up of copper powder, iron powder, tungsten powder and lead powder.
The difference of embodiment 33-36 and embodiment 1-4 is only that the metallic dust in reinforcing filler is made up of copper powder, iron powder, tungsten powder, titanium valve and aluminium powder.
The difference of embodiment 37-40 and embodiment 1-4 is only that the metallic dust in reinforcing filler is made up of copper powder, iron powder, tungsten powder, titanium valve, aluminium powder and lead powder.
The difference of embodiment 41-44 and embodiment 1-4 is only that the diameter of the reinforcing fiber in reinforcing filler is 10 μm, and slenderness ratio is 100:1.
The difference of embodiment 45-48 and embodiment 1-4 is only that the diameter of the reinforcing fiber in reinforcing filler is 10 μm, and slenderness ratio is 150:1.
The difference of embodiment 49-52 and embodiment 1-4 is only that the diameter of the reinforcing fiber in reinforcing filler is 10 μm, and slenderness ratio is 200:1.
The difference of embodiment 53-56 and embodiment 1-4 is only that the weight ratio of reinforcing fiber reinforcing fiber and metallic dust in additive is 1.5:1.
The difference of embodiment 57-60 and embodiment 1-4 is only that the weight ratio of reinforcing fiber reinforcing fiber and metallic dust in additive is 1.8:1.
The difference of embodiment 61-64 and embodiment 1-4 is only that the weight ratio of reinforcing fiber reinforcing fiber and metallic dust in additive is 2.5:1.
In view of the present invention program embodiment is numerous, each embodiment's laboratory 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 midrange that this place embodiment protects 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 FEP blend makes, be mainly stator metal outer pipe, polymeric layer successively from outside to inside, it is characterized in that, described polymeric layer adopts PTFE and FEP blend to make.
2. the screw drilling tool stator of use PTFE and FEP blend according to claim 1 making, it is characterized in that, described polymeric 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 polymeric 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 FEP blend according to claim 1 making, it is characterized in that, described thread groove is adjacent to be arranged on whole polymeric layer inwall or outer wall side by side.
4. one kind is applied to PTFE and the FEP blend of screw drilling tool stator, it is characterized in that, comprise PTFE, FEP and additive, described additive comprises reinforcing fiber and metallic dust, and described each component composition (with weight parts) is: PTFE and FEP blend 100 parts, additive 10-30 part.
5. a kind of PTFE and FEP blend being applied to screw drilling tool stator according to claim 4, it is characterized in that, in PTFE and FEP blend, PTFE accounts for 70-90%, and FEP accounts for 10-30%.
6. a kind of PTFE and FEP blend being applied to screw drilling tool stator according to claim 4, is characterized in that, the weight ratio of described reinforcing fiber and metallic dust is (1.5-2.5): 1.
7. a kind of PTFE and the FEP blend being applied to screw drilling tool stator according to claim 4 or 6, it is characterized in that, described reinforcing fiber is one or more in carbon fiber, glass fibre, boron fiber, aramid fibre, polyester fibre, nylon fiber, polyimide fiber.
8. a kind of PTFE and the FEP blend being applied to screw drilling tool stator according to claim 4 or 6, is characterized in that, described metallic dust is one or more in copper powder, iron powder, tungsten powder, titanium valve, aluminium powder, lead powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410712265.4A CN104712494B (en) | 2014-11-28 | 2014-11-28 | A kind of screw drilling tool stator made using PTFE and FEP blends and the fluorine material applied to the stator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410712265.4A CN104712494B (en) | 2014-11-28 | 2014-11-28 | A kind of screw drilling tool stator made using PTFE and FEP blends and the fluorine material applied to the stator |
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| CN104712494A true CN104712494A (en) | 2015-06-17 |
| CN104712494B CN104712494B (en) | 2017-12-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107524680A (en) * | 2017-10-19 | 2017-12-29 | 苏州华丰不锈钢紧固件有限公司 | Hex(agonal)screw simple in construction |
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| CN107524680A (en) * | 2017-10-19 | 2017-12-29 | 苏州华丰不锈钢紧固件有限公司 | Hex(agonal)screw simple in construction |
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