Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, propose the protection processing method of a kind of sucker rod, oil pipe and sleeve pipe (hereinafter to be referred as bar, pipe).
Main technical schemes of the present invention: at first protect body from protective mechanism, the method that adopts the spraying of duplex plating and/or inside and outside wall is to reach anticorrosion, antiscale, lubricious, attrition resistant purpose simultaneously.
The concrete treatment process of the present invention may further comprise the steps:
1. oil removing: pending rod tube is put into the degreasing tank with degreasing fluid,, heat dope or the sump oil promptly removed after 2 hours on pipe, the bar, the composition of described degreasing fluid and weight percentage with 60-90 ℃ of groove internal heater heating:
Clear clear agent 30%, concentration is the sodium hydroxide 15% of 20-30%, all the other are tap water, the amount of degreasing fluid with expired bar, tube-surface exceeds;
2. rust cleaning: bar, pipe after step (1) oil removing are put into the rust cleaning groove that fills rust remover, soak grease, rust staining and the oxide film that to remove bar, tube-surface in 2-8 minute down at 10-35 ℃, the hydrochloric acid 50% of the composition of described rust remover and percentage composition: concentration 31-38%, inhibiter hexamethylenetetramine 3-5%, all the other are water, its add-on for expired bar, tube-surface exceeds;
3. surface active: step (2) rust cleaning back bar, pipe are put into the activated bath that fills activation solution, soak 40-60 second down at 5-30 ℃, the composition of described activation solution and weight percentage are: concentration is that the sulfuric acid 40% of 94-96% is blended into 60% clear water, its add-on with expired bar, tube-surface exceeds;
4. Ni-Zn-P is promptly plated in the anode plating: bar, pipe after step (3) is handled are put into the coating bath with chemical plating fluid, controlling pH value down at 98 ℃ is 8.8-9.2, handled the Ni-Zn-P coating of the Zn promptly obtain containing 12-15% through 4 hours, described Ni-Zn-P chemical liquids prescription is by g/L: NiSO
47H
2O27-35, NaH
2PO
2H
2O 10, Trisodium Citrate 85, NH
4Cl 50,25% NH
4OH 0-60, ZnSO
47H
2O 7.5-15, the add-on of chemical plating fluid expired bar, pipe 10cm;
5. Ni-P/PTFE (tetrafluoroethylene) is promptly plated in multi-functional plating, step (4) anode plating back sucker rod or oil pipe are placed the coating bath of the Ni-P/PTFE composite plating bath behind the mixing, the control pH value is 4.5-5.0, handles 4 hours down at 80-90 ℃, described Ni-P/PTFE composite plating bath prescription: NiSO
47H
2O29g/L, NaH
2PO
2H
2O 35g/L, propionic acid 2mg/L, thiocarbamide 1mg/L, PTFE dispersion liquid 36g/L, complex acid 24mg/L, the amount of described composite plating bath expired bar, pipe 10cm.
The present invention can also adopt inside and outside wall spraying, stoving process, detailed process in above-mentioned processing step (2) rust cleaning back:
1. inner-wall spraying: with the atomizing of spraying paint of interior varnish spray gun, the pressure that sprays paint is 4-6kg/cm
2, interior varnish spray gun is in the oil pipe endoporus, and the speed of travel is 20-30m/min, to-and-fro movement, with 500 commentaries on classics/min rotation, spray 2-3 each coat-thickness is the 15-20 micron to body in situ, every spray once all needs the baking and curing paint film;
2. outer wall spraying: with spray gun is 150g/min spray 2-3 time with the flow, and each thickness is the 20-25 trace, and every spray once all needs the baking and curing paint film;
3. baking and curing is sprayed paint: oil pipe and the every spray of sleeve pipe inside and outside wall are intact once promptly imports in the stoving oven continuously, 180-200 ℃ of oven dry, oil pipe is from advancing stove to the 60 minutes time of coming out of the stove, the paint film of each spraying back oven dry is brown, as bright as a sixpence, adopt the oil-pipe external wall spraying method for sucker rod, same each spraying back baking and curing is sprayed paint.
The present invention can also adopt wall anode plating, the multi-functional plating of inwall, outer wall spraying, baking and curing paint film technology for oil pipe or sleeve pipe behind surface active, obtain interior wall coating, outer wall is coated with structural sheet or the plating of inside and outside wall anode, inner-wall spraying, outer wall spraying, baking and curing paint film technology obtain mixolimnion again.
When the present invention repairs for the sucker rod, oil pipe or the telescopic that use the day after for some time, after its oil removing, rust cleaning, adopt method scale removal, alignment, reparation screw thread commonly used, finish thermal treatment on, the overclocking heat-treating machine middle and high, carry out coating and/or coating by above-mentioned technological process then at sucker rod, oil pipe and sleeve pipe that the anticorrosion new technology development in Beijing group produces.
The described clean-out system of step of the present invention (1) is that the trade mark that Harbin promotes the chemical plant to produce is the HB-9801 clean-out system;
The described PTFE dispersion liquid of step of the present invention (5) is to provide its technical indicator by the anticorrosion new technology development in Beijing group: PTFE solids content (heavy %): 60; Surfactant content (heavy %): 6 ± 1; PH value 9-10; Proportion (20 ℃) is 1.5-1.530.
The spraying paint of the present invention spraying comprises any in epoxy phenolics, petroleum resin, vibrin, powder coating, the bituminous composition, 30-40 second when the viscosity of lacquer is 25 °.
Described other industrial chemicals of the present invention is commercially available product.
The structure of degreasing tank, rust cleaning groove, activated bath, coating bath and heating system thereof that step of the present invention (1)-(5) are used all is identical.
Described trough is made of R a T mast-up, well heater control valve, groove internal heating comb (being well heater), trough is of a size of long 11 meters, the wide and high 0.8-1.4 of being rice, wall thickness with No. 20 steel plate welderings is 5-10mm, pending R a T can place in the groove, be provided with the well heater with heat-conducting oil heating in the groove, the liquid in the groove is by heater heats.
The heating system of described trough is by 0.3m
3Heat conducting oil boiler, oil return control valve, go out oil control valve, thermometer, oil-gas separator, expansion and add oil sump, transporting hot oil pump, delivery valve, fuel charging valve, heating calancria (well heater) and constitute, wherein said heating calancria is No. 20 steel pipes of Φ 76 * 3, spacing 100mm, long 10.5 meters, at the sidewall and the bottom uniform distribution of groove.
Described heat conducting oil boiler and thermal oil are produced by Heilongjiang Province's Anda City boiler factory.
Described valve, thermometer, Heat-transfer Oil Pump are produced by the water pump works, Changchun.
Described oil-gas separator, expansion add oil sump, well heater and groove and are produced by the anticorrosion new technology development in Beijing group.
The stoving oven that baking and curing paint film of the present invention is used is by upper furnace, upper furnace body heating calancria scatterer and thermal oil delivery valve thereof, upper furnace, upper furnace body well heater pylon, upper furnace body asbestos lagging material, enters upper furnace body heating tube scatterer thermal oil valve, the stokehold chain that transmits pipe to be dried, bar, lower hearth heating calancria scatterer, control lower hearth heating calancria scatterer turnover heat conduction fuel tap, speed reduction unit and driving chain thereof and driving chain wheel and forms.Described body of heater is long * and wide * high=6 * 12 * 2 meters, the burner hearth inside dimension is 11 * 6 * 0.6 meter, and Control for Kiln Temperature is by the control of heat transfer oil heater output temperature by-pass cock, and the stove internal heater is the calandria structure, and heating carrier is 320 ℃ of thermal oils, with 18m per hour
3Discharge capacity in well heater, flow, heating heat-conducting oil boiler export temperature is 290 ± 10 ℃, temperature is controlled at 190 ± 10 ℃ of 220 ± 10 ℃, oil pipe, sleeve pipe oven dry in the burner hearth, oil pipe, sleeve pipe are 5.8 meters two heat conduction supportings by spacing in stove, on guide rail, have 2 cun chains to creep with 6 meters speed per hour, guarantee oil pipe, sleeve pipe from advance stove to the used time of coming out of the stove be 60 minutes.
The present invention is that Beijing anticorrosion new technology development group produces repairing sucker rod, oil pipe and the effective heat-treating machine of cover, and the trade mark is the GR-1 type.
Advantage of the present invention and effect:
Method of the present invention realizes galvanic protection because bar, pipe are carried out anodic coating; Because bar, pipe are carried out multi-functional coating, particularly coating embeds tetrafluoroethylene, bar, anticorrosion, the antiscale of pipe, performance such as lubricated, wear-resisting are increased substantially, so after treatment bar, pipe are particularly suitable for rod-pumped well, polymer injection and carbonic acid gas well; Method of the present invention can also be that the endoporus anode plates multi-functional plating, outer wall spraying then, it can also be the internal and external anode plating, inside and outside wall spraying again obtains mixolimnion, can be according to customer requirements, select arbitrary processes to become antiscale layer, wax control layer, preservative coat or other multi-functional layer, with strong points like this, can reduce cost, and particularly suitable; Method of the present invention can be repaired used old bar, pipe equally; in reparation, add the surface heat treating processes; can recover the performance of old bar, pipe; and make old bar, pipe increase multiple means of defence and protective layer; make old bar, manage the use of going into the well again, can obtain considerable economic benefit.
By illustrated in figures 1 and 2, the both sides of groove 4 are provided with vertical loading board, pipe holder 1, and processed bar, pipe 3 place in the groove 4, be provided with in the both sides of groove 4 and bottom heating carrier take conduction oil as heating calancria heater 6, the both sides of groove 4 are heater control valve 5.
By shown in Figure 3, the heating system of groove 4 has heat-conducting oil heating boiler 1, hot oil pump 7, with heat-conducting oil heating boiler 1 be arranged on the pipeline that the heating calancria heater 6 of groove 4 is communicated with and be provided with oil return control valve 2 and oil return valve 8, be connected with gs-oil separator 9 with pipeline with heat-conducting oil heating boiler 1 top, be provided with out oil control valve 3 at its pipeline, the other end of gs-oil separator 5 links to each other with heating calancria 6 by pipeline, its pipeline is provided with inlet valve 5, the pipeline that is connected with transporting hot oil pump 7 at oil return valve 8 is provided with that receivable expansion added oil sump 10 when conduction oil is overheated to be overflowed, and at the pipeline of gs-oil separator 9 and inlet valve 5 thermometer 11 is housed.
By shown in Figure 4, drying oven has upper furnace 2, upper furnace body heating calancria (heater) 3 and pylon 4 thereof, upper furnace body has asbestos heat-insulation layer 5, lower furnace body heating calancria 11, transmit oil pipe to be dried, the chain 10 of sleeve pipe 7 (arrow is the chain drive direction), the speed of service of control chain 10 and the decelerator 15 that links to each other with motor 13 and the drive sprocket 17 that is connected by driving chain 16 thereof, in addition, also have the upper furnace body heating calancria to advance stokehold supporting leg 9 and the fire door 18 of conduction oil inlet valve 6, delivery valve 1, lower furnace body heating calancria inlet valve 12 (right side is delivery valve), stokehold chain 8, a fixed support.
By shown in Figure 5, the oil pipe behind the coating is made of body 3, anode coating 2 and functional coating.
By shown in Figure 6, the oil pipe after the coating is made of body 3 and coating 4-1 and coating 4-2.
By shown in Figure 7, the oil pipe after inwall plating, outer wall are coated with is made of coating 4, body 3, anode coating 2, functional coating 1.