Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Screw drill stator made of PTFE (Polytetrafluoroethylene) and PTFE applied to stator

A technology of screw drilling tools and PTFE, which is applied in earthwork drilling, drilling equipment, driving devices for drilling in boreholes, etc. It can solve problems such as rubber damage, rubber bushing aging, and excess processing residues, and reduce the friction coefficient. and linear expansion coefficient, improved heat resistance and wear resistance, and excellent dimensional stability

Active Publication Date: 2015-04-29
ZHEJIANG GREEN NEW MATERIALS
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the inner wall of the tubular casing of the stator in the prior art is provided with concave thread grooves, the processing technology of the tubular casing is difficult, the molding process is complicated, and more processing residues are generated, which greatly increases the processing cost
In addition, the rubber bushing is injected on the inner wall of the housing by high pressure, and the molding process is also very complicated, with high processing costs and low labor efficiency
In the prior art, the rubber bushing materials of screw drilling tools are generally NBR and HNBR. Among them, the limit temperature (static) of HNBR is 176°C, but the long-term temperature of high-temperature wells is close to 170°C. According to the working characteristics of screw drilling tools, The temperature is easy to concentrate on the part where the rubber bush and the rotor are in contact, and the dynamic heat generated by mutual extrusion and torsion between the stator and the rotor
When the temperature is high and concentrated in the above area for a long time, it will cause the aging of the rubber bushing, which will cause rubber damage
Therefore, the service life of screw drilling tools for high-temperature wells in the prior art is short, generally only more than 100 hours, the service life is short, and the maintenance requirements are high, which seriously affects the efficiency and progress of drilling work and increases drilling costs.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Screw drill stator made of PTFE (Polytetrafluoroethylene) and PTFE applied to stator
  • Screw drill stator made of PTFE (Polytetrafluoroethylene) and PTFE applied to stator
  • Screw drill stator made of PTFE (Polytetrafluoroethylene) and PTFE applied to stator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of PTFE that is applied to screw drilling tool stator, comprises PTFE and additive, and described additive comprises polyether ether ketone powder, carbon fiber, glass fiber and graphite, and wherein, described each component composition (by mass percentage) is : Polyether ether ketone powder: 5%, carbon fiber: 5%, glass fiber: 10%, graphite: 8%, the balance is polytetrafluoroethylene powder. The particle size of the 50% graphite is 70 μm, and the particle size of the 50% graphite is 40 nm. Both the carbon fiber and the glass fiber have a diameter of 15 μm and an aspect ratio of 150:1.

[0035] When the above-mentioned PTFE is used to make the stator of the screw drilling tool, PTFE, polyetheretherketone powder, carbon fiber, glass fiber, and graphite are mixed uniformly by a high-speed kneading machine, and then smelted and extruded to be granulated into powder, and then extruded or Injection molding or molding to obtain one of the application structures such a...

Embodiment 2

[0037] A kind of PTFE that is applied to screw drilling tool stator, comprises PTFE and additive, and described additive comprises polyether ether ketone powder, carbon fiber, glass fiber and graphite, and wherein, described each component composition (by mass percentage) is : Polyether ether ketone powder: 8%, carbon fiber: 8%, glass fiber: 15%, graphite: 8%, the balance is polytetrafluoroethylene powder. The particle size of the 45% graphite is 75 μm, and the particle size of the 55% graphite is 35 nm. Both the carbon fiber and the glass fiber have a diameter of 12 μm and an aspect ratio of 180:1.

[0038] When the above-mentioned PTFE is used to make the stator of the screw drilling tool, PTFE, polyetheretherketone powder, carbon fiber, glass fiber, and graphite are mixed uniformly by a high-speed kneading machine, and then smelted and extruded to be granulated into powder, and then extruded or Injection molding or molding to obtain one of the application structures such a...

Embodiment 3

[0040] A kind of PTFE that is applied to screw drilling tool stator, comprises PTFE and additive, and described additive comprises polyether ether ketone powder, carbon fiber, glass fiber and graphite, and wherein, described each component composition (by mass percentage) is : Polyether ether ketone powder: 6%, carbon fiber: 8%, glass fiber: 12%, graphite: 5%, the balance is polytetrafluoroethylene powder. The particle size of the 55% graphite is 65 μm, and the particle size of the 45% graphite is 45 nm. Both the carbon fiber and the glass fiber have a diameter of 18 μm and an aspect ratio of 120:1.

[0041] When the above-mentioned PTFE is used to make the stator of the screw drilling tool, PTFE, polyetheretherketone powder, carbon fiber, glass fiber, and graphite are mixed uniformly by a high-speed kneading machine, and then smelted and extruded to be granulated into powder, and then extruded or Injection molding or molding to obtain one of the application structures such a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a screw drill stator made of PTFE (Polytetrafluoroethylene) and the PTFE applied to the stator. The stator mainly comprises a stator shell and a polymer layer in sequence from outside to inside, wherein the polymer layer is made of the PTFE. The PTFE applied to the drill screw stator comprises PTFE powder and an additive, wherein the additive comprises the following components: 1-10 percent of polyether-ether-ketone powder, 0.5-10 percent of carbon fiber, 0.5-20 percent of glass fiber and 0.5-10 percent of graphite, and the balance is the PTFE powder. The screw drill stator made of the PTFE with reasonable compatibility has favorable toughness at about 170 DEG C, and can withstand long-term corrosion of drilling fluid as well as strong acids and strong alkali, the service life is prolonged to over 250h, the maintenance period is prolonged, and further, the production cost and the maintenance cost of equipment are reduced.

Description

technical field [0001] The invention relates to a screw drilling tool stator made of PTFE and the PTFE applied to the stator. Background technique [0002] Polytetrafluoroethylene (PTFE) resin has excellent properties such as high and low temperature resistance, corrosion resistance, aging resistance, high insulation, and non-stickiness. However, due to its poor dimensional stability, poor thermal conductivity, large creep, and low hardness, especially in It is easy to wear under load, which limits its application in the fields of mechanical bearing, friction and wear, and seal lubrication. Therefore, in order to expand the application field of PTFE, it is necessary to modify its filling, that is, to use the advantages of filling particles such as high hardness, wear resistance, stable size, and good thermal conductivity to improve the defects of PTFE. [0003] The screw drilling tool is a volumetric downhole power drilling tool that uses drilling fluid as power and convert...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): E21B4/02F03C2/08C08L27/18C08L61/16C08K7/06C08K7/14C08K3/04
CPCC08L27/18E21B4/02F03C2/08C08L61/16C08K7/06C08K7/14C08K3/04
Inventor 徐洪谢根发陈超景亚宾
Owner ZHEJIANG GREEN NEW MATERIALS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com