CN106736265A - A kind of preparation method of titanium alloy oil well pipe - Google Patents
A kind of preparation method of titanium alloy oil well pipe Download PDFInfo
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Abstract
The present invention provides a kind of titanium alloy oil well pipe preparation method, from Ti 6Al 4V 0.1Ru as oil well pipe body material, blank external coating protective coating before heating connects button sealing surface designed arc-shaped appearance, and improve buttress thread, body and thread surface brushing Nanometer Copper composite coating.The oil well pipe of preparation, corrosion resistance is strong, good mechanical property, long service life, and anti-adhesive buckle ability is excellent.By to oil well casing special thread and the treatment for connecing button, and protection and anti-adhesive buckle coating research and development and use, so as to improve the air-tightness and service life of oil well pipe, frictional force and torque wrench moment between thread surface are effectively reduced, reach the purpose for improving the anti-adhesive buckle performance of tubing and casing.
Description
Technical field
The present invention relates to technical field of nonferrous metal processing, and in particular to a kind of preparation method of titanium alloy oil well pipe.
Background technology
As the fast development of China's economy, the demand of petroleum gas are growing day by day, accelerate to containing H high2S、CO2、
CL-Deng the exploitation of the oil gas field that cost of exploration ＆ development is high, operating mode is extremely harsh, sulfur-bearing in the widely distributed natural gas resource of China
The gas field of gas accounts for sizable ratio, and such as Sichuan, Tarim, Xinjiang block belongs to Oil ＆ gas field in sulfur.The country is to containing H high2S、
CO2、CL-The Anticorrosion in gas field has carried out research and technology tackling key problem for many years, and takes various anti-corrosion measures, such as adopts
With low-alloy sulfur resistive tubing, fill corrosion inhibiter, corrosion-inhibiting coating, nickel-base alloy etc..It is corrosion-resistant that current western China uses
Alloy pipe mainly with 13Cr and nickel-base alloy based on, for the need that sulfur-bearing high area 13Cr cannot meet severe rugged environment
Will.Although nickel-base alloy corrosion resistance and good, nickel-base alloy there is also processing technology complexity, and production technology difficulty is big, material
The defects such as the easy damage in material high cost surface, and China's nickel resources are deficient, rely on and are unfavorable for oil gas field with nickel-base alloy tubing
Long-range strategy development.
Due to the oil well pipe of the material such as common carbon steel, low-alloy steel or even 13Cr, 22Cr, its mechanical performance and corrosion resistance
Can be poor, and frictional force between the oil well pipe screw thread and thread gluing thread surface of use at present and torque wrench moment is big, anti-adhesive buckle performance
The problems such as difference, the air-tightness and service life of oil well pipe are reduced, can not meet the requirement of above-mentioned particular surroundings, it is necessary to adopt
With highly corrosion resistant alloy OCTG.Titanium alloy density is small, and specific strength is high, excellent anti-corrosion performance, with good antifatigue
And croop property, there is huge application potential in petroleum chemical industry.
The content of the invention
The present invention is poor for above-mentioned mechanical performance present in prior art, corrosion resisting property, oil well pipe screw thread air-tightness with
Thread gluing problem, there is provided a kind of preparation method of titanium alloy oil well pipe, using new nipple and Nanometer Copper coating, so as to improve
The air-tightness and service life of oil well pipe, effectively reduce the frictional force and torque wrench moment between thread surface, reach improvement oil
The purpose of the anti-adhesive buckle performance of sleeve pipe.
Technical solution of the present invention is as follows：
A kind of preparation method of titanium alloy oil well pipe, step includes：
1）Prepare titanium alloy pipe
By the length cut-out on request of Ti-6Al-4V-0.1Ru titanium alloy blanks, and phase is worked on request to the blank after cut-out
The outside dimension answered, while ensureing 3.2 μm of surface roughness Ra ＜ after its processing, obtains titanium alloy pipe；
2）Prepare titanium alloy tube
Titanium alloy blank both ends of the surface are processed with internal point, blank surface brushing protective coating is subsequently placed in heating in annular furnace, then
Perforated, tube rolling, sizing, cooling, correction, sawing, sandblasting operation, obtain titanium alloy tube successively；
3）Junction button screw thread process
The sealing surface that the body at titanium alloy tube junction button position and box cupling cooperate is carried out into Excircle machining, then body with
Box cupling two ends process the male and female screw thread of buttress thread respectively, then carry out screw thread finishing by numerically controlled lathe, complete screw thread
Thread works；
4）The anti-stick buckle reason of thread surface
The raw material constituted by following weight/mass percentage compositions prepares anti-adhesive buckle coating：Organic binder bond 30~40%, kollag 45
~60%, preservative 6~14%, wetting agent 0.05~0.1%, after mixing, thread surface are painted on after above-mentioned raw materials mixing, are dried,
Obtain titanium alloy oil well pipe.
Step 2）Described in protective coating, weight/mass percentage composition composition：SiO220~45%, Al2O32~5%, Li2CO3
5~10%, H2BO320~40%, TiO20~5%, CaCO33~10%, ZrO25~10%, Na2CO35~10%, K2CO3 10
~15%, binding agent 1%；Described binding agent is the Sodium Polyacrylate and 5wt%NaSiO of 95wt%3•9H2The mixture of O.
Step 2）In, when being heated in annular furnace, using heat stepwise, including low temperature section and high temperature quick fraction at a slow speed, specifically
For：Low temperature at a slow speed section firing rate be 10min/cm, including 500~650 DEG C of preheating section, heating I section 650~800 DEG C, heat II
III sections 1000~1080 DEG C of 800~1000 DEG C of section and heating；High temperature quick fraction micro-oxidizing atmosphere heating and thermal insulation, burner hearth pressure-fired,
Firing rate is 7min/cm, including 1000~1070 DEG C of soaking zone temperature, 950~1120 DEG C of drop temperature.
Step 2）In, described perforation, temperature is 920~1050 DEG C, temperature 960~1120 in perforation procedure before perforation
DEG C, 930~1080 DEG C of temperature after perforation；
Step 2）In, described tube rolling carries out secondary finish rolling to pipe, wherein, 880~1050 DEG C of temperature, finish rolling before finish rolling
930~1010 DEG C of temperature in journey, 830~980 DEG C of temperature after finish rolling.
Step 2）In, described sizing, temperature is 850~980 DEG C before sizing, and maximum heating temperature is 1100 DEG C, sizing
Temperature is 760~840 DEG C afterwards.
Step 3）In, the preferred circular arc type of sealing surface that step surface cooperates in described body end and box cupling；
Step 3）In, described buttress thread, the preferably tooth of per inch 8,6 teeth, 5 teeth determine with specific reference to size.
Step 3）In, buttress thread processing carries out screwing operation using staggered-tooth tap, will screw tap cutter tooth it is every
One, interval just removes one, in being staggered；Buttress thread process equipment is：Using FANUC systems, bed ways are used
Load-carrying rolling line slideway, can bear heavy cut, 60 ° of tilting lathe bed structures, oild chuck, upper and lower immovable support combination.
Step 4）In, described organic binder bond preferred polyamide imide resin；Preferred group of described kollag
Mixture as 60wt% Nanometer Coppers, 20wt% polytetrafluoroethylene (PTFE) and 20wt% curing copper；The preferred stearic acid of described preservative
Calcium；Described wetting agent preferred, polyethers silicone copolymers.
Titanium alloy oil well pipe preparation method of the present invention, from Ti-6Al-4V-0.1Ru as oil well pipe body material, with
The titanium alloy of general TC4 materials is compared, and improves its anti-crevice corrosion and stress corrosion resistant in chloride environment.Blank is adding
External coating protective coating can avoid bar stock that various chemical reactions and suction occur with oxygen, nitrogen, carbon, iron etc. in heating before hot
Hydrogen, because harmful components have been isolated in the application of sealing paint, realizes annular furnace heating technique, with respect to the reduction of heating by electric cooker technique
Cost, improve efficiency.Using new joint, Novel joint has that good air-tightness, bonding strength be high, not fallibility
Button, torque wrench moment are easy to control.Connect button sealing surface designed arc-shaped appearance and reduce stress concentration corrosion, coupler bore airflow design is carried
Flow efficiency high, reduces vortex and erosion.Buttress thread is improved, bonding strength is high, be difficult thread alternating, adhesive buckle；Connector portions
The tensile strength of position, yield strength is not less than the intensity of body, there is provided accurate knot positioning, enhances the sealing energy of joint
Power and integrated connection intensity.New Nanometer Copper composite Nano anti-attrition coating, not only can effectively improve the anti-adhesive buckle of titanium alloy
Energy, and the mechanical property of titanium alloy will not be damaged, it is matrix to use Nanometer Copper, adds other nano particles, epoxy resin to make
It is main binder, meets energy-conserving and environment-protective requirement.
The present invention uses above-mentioned technical proposal, has the advantages that compared with prior art：The present invention prepares a kind of
New oil well pipe, corrosion resistance is strong, good mechanical property, long service life, and anti-adhesive buckle ability is excellent.By to oil well set
Pipe special thread and the treatment of button is connect, and protection and the research and development of anti-adhesive buckle coating and used, so as to improve the gas of oil well pipe
Close property and service life, effectively reduce the frictional force and torque wrench moment between thread surface, reach the improvement anti-adhesive buckle of tubing and casing
The purpose of energy.
Brief description of the drawings
Fig. 1 is the body at titanium alloy tube junction button position of the present invention（A）With box cupling（B）And screw thread；
Fig. 2 be titanium alloy oil well pipe of the present invention with common oil well pipe different loads under friction factor；
In figure, 1, the common oil well pipes of 2N-, 2, the common oil well pipes of 6N-, 3, the common oil well pipes of 10N-, 4,2N- titanium alloy oil well pipes,
5th, 6N- titanium alloy oil well pipes, 6,10N- titanium alloy oil well pipes；
Fig. 3 is titanium alloy oil well pipe of the present invention and ordinary carbon steel oil well pipe resisting salt fog corrosion RATES.
Specific embodiment
Below will be by embodiment further description technical solution of the present invention.These descriptions are not to present invention
It is further limited.All equivalents made to present invention, or be correspondingly improved, still fall within protection model of the invention
Within enclosing.
Embodiment 1
A kind of preparation method of titanium alloy oil well pipe, step includes：
1）Prepare titanium alloy pipe
By the length cut-out on request of Ti-6Al-4V-0.1Ru titanium alloy blanks, and phase is worked on request to the blank after cut-out
The outside dimension answered, while ensureing 3.2 μm of surface roughness Ra ＜ after its processing, obtains titanium alloy pipe；
2）Prepare titanium alloy tube
Internal point, blank surface brushing protective coating are processed to titanium alloy blank both ends of the surface（Protective coating, weight/mass percentage composition group
Into SiO232%, Al2O35%, Li2CO35%, H2BO323%, TiO2 5%, CaCO37%, ZrO25%, Na2CO37%, K2CO310%,
Binding agent 1%；Binding agent is Sodium Polyacrylate and 5wt%NaSiO3 9H2O the mixing composition of 0.95wt%）；
It is subsequently placed in heat stepwise in annular furnace, section firing rate is 10min/cm to low temperature at a slow speed, including 500 DEG C of preheating section~
III sections 1000~1080 DEG C of 650 DEG C, I sections 650~800 DEG C of heating, II sections 800~1000 DEG C of heating and heating；High temperature quick fraction
Micro-oxidizing atmosphere heating and thermal insulation, burner hearth pressure-fired, firing rate is 7min/cm, including 1000~1070 DEG C of soaking zone temperature, is gone out
950~1120 DEG C of material temperature degree；
Perforated successively again（Temperature is 920~1050 DEG C, 960~1120 DEG C of temperature in perforation procedure, temperature after perforation before perforation
930~1080 DEG C）, tube rolling（Secondary finish rolling, wherein, 880~1050 DEG C of temperature before finish rolling, temperature 930~1010 in finishing stands
DEG C, 830~980 DEG C of temperature after finish rolling）, sizing（Temperature is 850~980 DEG C before sizing, and maximum heating temperature is 1100 DEG C, fixed
Temperature is 760~840 DEG C behind footpath）, cooling, correction, sawing, sandblasting operation, obtain titanium alloy tube；
3）Junction button screw thread process
The sealing surface that the body at titanium alloy tube junction button position and box cupling cooperate is carried out into Excircle machining（Make body end and
The sealing surface that step surface cooperates in box cupling is circular arc type）, then partially trapezoidal spiral shell is processed respectively in body and box cupling two ends
The male and female screw thread of line（The tooth of per inch 6）, then screw thread finishing is carried out by numerically controlled lathe, complete the work of screw thread thread（Fig. 1）；
Buttress thread processing carries out screwing operation using staggered-tooth tap, will the cutter tooth of screw tap just remove at interval of one
One, in being staggered；Buttress thread process equipment is：Using FANUC systems, bed ways are led using load-carrying rolling straight line
Rail, can bear heavy cut, 60 ° of tilting lathe bed structures, oild chuck, upper and lower immovable support combination；
4）The anti-stick buckle reason of thread surface
The raw material constituted by following weight/mass percentage compositions prepares anti-adhesive buckle coating：Organic binder bond 35.1%, kollag
54.8%th, preservative 10%, wetting agent 0.1%, after mixing, thread surface are painted on after above-mentioned raw materials mixing, are dried, and obtain titanium alloy
Oil well pipe.
Wherein organic binder bond is polyamide-imide resin；Kollag composition is 60wt% Nanometer Coppers, 20wt% gathers
The mixture of tetrafluoroethene and 20wt% curing copper；Preservative is calcium stearate；Wetting agent is polyether siloxane copolymer.
Embodiment 2
A kind of preparation method of titanium alloy oil well pipe, difference from Example 1 is：
2）Protective coating, weight/mass percentage composition composition SiO224%, Al2O35%, Li2CO39%, H2BO326%, TiO2 5%,
CaCO38%, ZrO24%, Na2CO39%, K2CO310%, binding agent 1%；Binding agent is the Sodium Polyacrylate and 5wt% of 95wt%
NaSiO3 9H2O mixing compositions.
3）The tooth of male and female threads per inch 8；
4）Anti- adhesive buckle coating：Organic binder bond 33.95%, kollag 60%, preservative 6%, wetting agent 0.05%.
Embodiment 3
A kind of preparation method of titanium alloy oil well pipe, difference from Example 1 is：
2）Protective coating, weight/mass percentage composition composition SiO239%, Al2O35%, Li2CO35%, H2BO320%, TiO2 5%,
CaCO35%, ZrO25%, Na2CO35%, K2CO310%, binding agent 1%；Binding agent is the Sodium Polyacrylate and 5wt% of 95wt%
NaSiO3 9H2O mixing compositions.
3）The tooth of male and female threads per inch 5；
4）Anti- adhesive buckle coating：Organic binder bond 40%, kollag 45.9%, preservative 14%, wetting agent 0.1%.
Titanium alloy oil well pipe product prepared by the present invention（As a example by having been carried out example 1）Performance evaluation：
The contrast of frictional wear experiment titanium alloy oil well pipe and common oil well pipe friction factor under different loads, fretting wear reality
Test that used be silicon nitride to mill material, load is respectively 2,6,10N rotating speed 225r/min, the time is 12 minutes, as a result such as
Shown in Fig. 2, as a result show：The friction factor versus time curve of titanium alloy oil well pipe style prepared by the present invention is than general
Logical steel wants gentle many, substantially not time to time change.With the increase of load, the friction factor of titanium alloy oil well pipe is
Increase, but increasing degree is less, and the friction factor amplitude of variation of reference sample is larger.The common oil well pipe under different loads
Friction factor will be more than the friction factor of titanium alloy oil well pipe.
Titanium alloy oil well pipe of the present invention and ordinary carbon steel oil well pipe resisting salt fog corrosion RATES, as shown in figure 3, result is aobvious
Show：Titanium alloy salt air corrosion speed is a ten thousandth of carbon steel, the one thousandth of stainless steel.
It can be seen that, after oil well pipe of the present invention employs new nipple and Nanometer Copper coating, improve the gas of oil well pipe
Close property and service life, effectively reduce the frictional force and torque wrench moment between thread surface, reach improvement oil well pipe it is anticorrosive and
The purpose of anti-adhesive buckle performance.
Although the foregoing describing specific embodiment of the invention, it will be appreciated by those of skill in the art that these
It is merely illustrative of, protection scope of the present invention is defined by the appended claims.Those skilled in the art is not carrying on the back
On the premise of principle of the invention and essence, various changes or modifications can be made to these implementation methods, but these are changed
Protection scope of the present invention is each fallen within modification.
Claims (10)
1. a kind of preparation method of titanium alloy oil well pipe, it is characterised in that step includes：
1）Prepare titanium alloy pipe
By the length cut-out on request of Ti-6Al-4V-0.1Ru titanium alloy blanks, and phase is worked on request to the blank after cut-out
The outside dimension answered, while ensureing 3.2 μm of surface roughness Ra ＜ after its processing, obtains titanium alloy pipe；
2）Prepare titanium alloy tube
Titanium alloy blank both ends of the surface are processed with internal point, blank surface brushing protective coating is subsequently placed in heating in annular furnace, then
Perforated, tube rolling, sizing, cooling, correction, sawing, sandblasting operation, obtain titanium alloy tube successively；
3）Junction button screw thread process
The sealing surface that the body at titanium alloy tube junction button position and box cupling cooperate is carried out into Excircle machining, then body with
Box cupling two ends process the male and female screw thread of buttress thread respectively, then carry out screw thread finishing by numerically controlled lathe, complete screw thread
Thread works；
4）The anti-stick buckle reason of thread surface
The raw material constituted by following weight/mass percentage compositions prepares anti-adhesive buckle coating：Organic binder bond 30~40%, kollag 45
~60%, preservative 6~14%, wetting agent 0.05~0.1%, after mixing, thread surface are painted on after above-mentioned raw materials mixing, are dried,
Obtain titanium alloy oil well pipe.
2. preparation method according to claim 1, it is characterised in that：Described protective coating, weight/mass percentage composition composition：
SiO220~45%, Al2O32~5%, Li2CO35~10%, H2BO320~40%, TiO20~5%, CaCO33~10%,
ZrO25~10%, Na2CO35~10%, K2CO310~15%, binding agent 1%；Described binding agent is the polyacrylic acid of 95wt%
Sodium and 5wt%NaSiO3 •9H2The mixture of O.
3. preparation method according to claim 1, it is characterised in that：Step 2）In, when being heated in annular furnace, using segmentation
Heating, including low temperature section and high temperature quick fraction at a slow speed, specially：Section firing rate is 10min/cm to low temperature at a slow speed, including is preheated
III sections 1000~1080 DEG C of 500~650 DEG C of section, I sections 650~800 DEG C of heating, II sections 800~1000 DEG C of heating and heating；It is high
Warm quick fraction micro-oxidizing atmosphere heating and thermal insulation, burner hearth pressure-fired, firing rate is 7min/cm, including soaking zone temperature 1000~
1070 DEG C, 950~1120 DEG C of drop temperature.
4. preparation method according to claim 1, it is characterised in that：Step 2）In, described perforation, temperature is before perforation
920~1050 DEG C, 960~1120 DEG C of temperature in perforation procedure, 930~1080 DEG C of temperature after perforation.
5. preparation method according to claim 1, it is characterised in that：Step 2）In, described tube rolling carries out two to pipe
Secondary finish rolling, wherein, 880~1050 DEG C of temperature before finish rolling, 930~1010 DEG C of temperature in finishing stands, temperature 830 after finish rolling~
980℃。
6. preparation method according to claim 1, it is characterised in that：Step 2）In, described sizing, temperature is before sizing
850~980 DEG C, maximum heating temperature is 1100 DEG C, and temperature is 760~840 DEG C after sizing.
7. preparation method according to claim 1, it is characterised in that：Step 3）In, in described body end and box cupling
The preferred circular arc type of sealing surface that step surface cooperates.
8. preparation method according to claim 1, it is characterised in that：Step 3）In, described buttress thread is every English
Very little 8 tooth, 6 teeth, 5 teeth.
9. preparation method according to claim 1, it is characterised in that：Step 3）In, the buttress thread processing is used
Staggered-tooth tap carries out screwing operation, will the cutter tooth of screw tap just remove one at interval of one, in being staggered；Buttress thread
Process equipment is：Using FANUC systems, bed ways use load-carrying rolling line slideway, can bear heavy cut, 60 ° of tiltings
Lathe bed structure, oild chuck, upper and lower immovable support combination.
10. preparation method according to claim 1, it is characterised in that：Step 4）In, described organic binder bond is polyamides
Amine imide resin；Described kollag composition is 60wt% Nanometer Coppers, 20wt% polytetrafluoroethylene (PTFE) and 20wt% curing copper
Mixture；Described preservative is calcium stearate；Described wetting agent is polyether siloxane copolymer.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019184470A1 (en) * | 2018-03-26 | 2019-10-03 | 中国石油天然气集团有限公司 | Method for determining manufacturing parameters of sealing structure of oil well pipe joint, and sealing method |
| CN112139764A (en) * | 2020-09-07 | 2020-12-29 | 鑫鹏源(聊城)智能科技有限公司 | Preparation method of titanium alloy oil well pipe |
| CN117548990A (en) * | 2023-11-07 | 2024-02-13 | 沈阳欧施盾新材料科技有限公司 | Processing method of carbon fiber reinforced aluminum matrix composite high-pressure gas cylinder nozzle sleeve |
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| CN117548990A (en) * | 2023-11-07 | 2024-02-13 | 沈阳欧施盾新材料科技有限公司 | Processing method of carbon fiber reinforced aluminum matrix composite high-pressure gas cylinder nozzle sleeve |
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