Petroleum drilling accessory rotary table manufacturing method

Abstract

The invention discloses a manufacturing method of a petroleum drilling accessory rotary table, and relates to the technical field of petroleum drilling. Comprising the following steps: step 1, blanking; step 2, cutting; step 3, welding; step 4, heat treatment; 5, rough machining; sixthly, secondary welding is conducted; step 7, shot blasting; 8, paint spraying; step 9, finish machining; and step 10, warehousing. According to the manufacturing method of the petroleum drilling accessory rotary table, robot welding is adopted, the performance of high precision, speed, stability, adaptability and the like is achieved, automatic production can be achieved, the production efficiency and quality are improved, the production cost is reduced, inert gas is introduced in the welding process, the welding seam forming and protecting effect can be effectively improved, and the production efficiency is improved. And meanwhile, the O / N in a welding seam is lower, and the quality of the welding seam is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling, in particular to a method for manufacturing a turntable of an oil drilling accessory. Background Art

[0002] In oil drilling, the drill tool is driven to break the rock, drill into the ground, and drill a wellbore of a specified depth for the oil or gas extraction machine to obtain oil or natural gas. A commonly used oil drilling rig is mainly composed of eight parts: power machine, transmission machine, working machine and auxiliary equipment. The hydraulic turntable is an important part of the oil turntable. The existing oil turntable manufacturing method mainly uses traditional welding process.

[0003] The invention with publication number CN110039159A discloses a method for welding steel plates, which includes the following steps: S1, cleaning the grooves of two steel plates to be welded; S2, splicing the two steel plates into a weld and performing tack welding on the weld; S3, performing pyrotechnic heating at the weld position; S4, performing submerged arc welding on the weld; S5, turning over the two steel plates; S6, performing bottom submerged arc welding on the bottom surface of the weld; S7, turning over the steel plates multiple times, and repeating steps S4 to S6 until the weld meets the welding requirements.

[0004] As demonstrated by the aforementioned invention, existing welding processes reduce deformation of steel plates after welding by performing pre-weld tack welding, heating the weld, and performing multiple submerged arc welding cycles. This also prevents defects such as porosity and cracks in the weld. However, the welding process produces a large amount of smoke and exhaust gas, polluting the environment. Furthermore, this welding method uses manually controlled equipment, resulting in relatively low welding efficiency and unreliable quality assurance. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a method for manufacturing a turntable for oil drilling accessories, which solves the existing problems.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A method for manufacturing a rotary table of oil drilling accessories, comprising the following steps:

[0007] Step 1: Cutting: Cut the steel plate according to the turntable design drawing and perform dimensional inspection;

[0008] Step 2: Cutting: Use plasma cutting or laser cutting to cut and shape the steel plate after cutting, and collect and treat the cutting exhaust gas and solid waste;

[0009] Step 3: Welding: Use robot welding to weld the cut steel plates;

[0010] Step 4: Heat treatment: heat treat the turntable after welding to eliminate welding stress;

[0011] Step 5: Rough machining: Rough machining is performed on the turntable after heat treatment, including turning, milling and drilling processes, and the noise and solid waste generated during the machining process are collected and treated;

[0012] Step 6: Secondary welding: perform secondary welding on the turntable after rough machining;

[0013] Step 7: Shot blasting: Shot blast the turntable after secondary welding;

[0014] Step 8: Painting: paint the turntable after shot blasting;

[0015] Step 9: Finishing: Finish the turntable after painting, including grinding and polishing processes;

[0016] Step 10: Warehousing: After the turntable has passed the inspection, it is put into storage for future use.

[0017] Preferably, during the welding, secondary welding and shot blasting steps, the smoke generated is collected and processed, and the smoke generated is sucked into a universal electrostatic welding smoke purifier for treatment by an exhaust fan. The electrostatic welding smoke purifier is connected to a muffler to avoid noise pollution.

[0018] Preferably, the steps of the robot welding are:

[0019] (1) First, build a three-dimensional model of the turntable based on the turntable design drawing;

[0020] (2) The steel plate is moved to the welding table and clamped, and the welding robot body moves the welding assembly to the top of the welding point of the steel plate to be welded through the weld seam tracking system;

[0021] (3) The welding robot uses the three-dimensional model to spray inert gas onto the steel plate to be welded during the welding process;

[0022] (4) After the inert gas comes into contact with the parts to be welded, it will escape to the surroundings to avoid potential safety hazards during the welding process. At the same time, the exhaust gas and inert gas generated by welding are drawn into the processing mechanism through the exhaust mechanism.

[0023] Preferably, the heat treatment step of the steel plate includes a first tempering treatment and a second tempering treatment;

[0024] During the first tempering process, the steel plate is preheated at 400-450°C for 1.5-2 hours, then heated to 630-650°C, with a holding time of ≥3 min / mm, and cooled in air after leaving the furnace;

[0025] The heating temperature in the second tempering is 600-610° C., the holding time is 8-12 hours, and the temperature out of the furnace is ≤350° C.

[0026] Preferably, during the second tempering process, the heating rate of the steel plate is controlled at 55-100°C / h when the temperature is above 350°C; and the cooling rate of the steel plate in the furnace is controlled at 55-100°C during the cooling process.

[0027] The loading and unloading temperature is ≤350℃, that is, the temperature of the steel plate when loading and unloading is ≤350℃. The specific implementation process is: the furnace temperature is raised to 350℃ or below, the steel plate is loaded into the furnace, heated and kept at 600-610℃, and then cooled to ≤350℃, and then the steel plate is taken out of the furnace and air-cooled.

[0028] Preferably, the shot blasting step of the turntable includes:

[0029] A: Transfer the turntable to the entrance roller of the shot blasting machine, and then inspect the shape and thickness of the turntable;

[0030] B: Shot blast the turntable according to the test results. During the shot blasting process, the roller speed of the shot blasting machine is 1.5-5m / s, and the shot material ejection speed of the shot blasting machine is 70m / s-90m / s;

[0031] C: Adjust the height of the large roller brush and the pre-scraper according to the detection data to clean the pellets on the surface of the turntable;

[0032] D: After shot blasting, the surface of the turntable is purged with compressed air.

[0033] Preferably, the organic waste gas generated during the painting process of the turntable needs to be collected and processed, which includes:

[0034] 1): Use the exhaust fan to absorb and collect the paint exhaust gas;

[0035] 2): Remove solid impurities from the paint spraying exhaust gas through the filter flame arrester to obtain completely gaseous exhaust gas;

[0036] 3): The completely gaseous waste gas is condensed at a temperature of 20-24°C, and the condensed liquid is removed to obtain the preliminarily toluene-free waste gas;

[0037] 4): The waste from the initial toluene removal is subjected to activated carbon adsorption treatment, and the adsorption-saturated activated carbon is regenerated by low-pressure steam.

[0038] Preferably, the finishing step of the turntable includes:

[0039] S1: Place the turntable under the grinding roller, and then use the electric field generator to charge the surface of the workpiece. If there are burrs on the surface of the workpiece, after the workpiece is charged, due to the principle of tip discharge, a large amount of charge will accumulate at the location of the burr and break through the air to be transferred to the detector;

[0040] S2: At this time, the surface of the turntable is ground by a grinding roller to remove burrs on the surface of the turntable;

[0041] S3: After the grinding is completed, the surface of the turntable is inspected again by the electric field generator and the detector. If there are still burrs on the surface of the turntable after the processing, the surface of the turntable is grinded again by the grinding roller until no burrs are detected on the turntable.

[0042] Beneficial effects

[0043] The present invention provides a method for manufacturing a rotary table for oil drilling accessories. Compared with the prior art, it has the following beneficial effects:

[0044] 1. The manufacturing method of the oil drilling accessories turntable adopts robot welding, which has high precision, speed, stability and adaptability, etc., can realize automated production, improve production efficiency and quality, and reduce production costs. In addition, the introduction of inert gas during the welding process can effectively improve the weld formation and protection effect, and suppress welding defects such as humps and spatters. At the same time, the O / N ratio in the weld is lower, further improving the weld quality.

[0045] 2. The method for manufacturing the turntable of oil drilling accessories uses an exhaust fan to draw the smoke generated in the welding, secondary welding and shot blasting steps into a universal electrostatic welding smoke purifier for treatment, and uses the exhaust fan to collect and treat the organic waste gas generated in the painting process, which can effectively reduce environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 Schematic diagram of the method flow of the present invention;

[0047] Figure 2 This is a schematic diagram of the robot welding process of the present invention;

[0048] Figure 3 Schematic diagram of the shot blasting process of the turntable of the present invention;

[0049] Figure 4 This is a schematic diagram of the process for collecting and treating organic waste gas according to the present invention;

[0050] Figure 5 Schematic diagram of the process flow of the finishing steps of the turntable of the present invention. DETAILED DESCRIPTION

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0052] See for example Figures 1 to 5 , the present invention provides the following six technical solutions:

[0053] The first embodiment: A method for manufacturing a rotary plate for oil drilling accessories, comprising the following steps:

[0054] Step 1: Cutting: Cut the steel plate according to the turntable design drawing and perform dimensional inspection;

[0055] Step 2: Cutting: Use plasma cutting or laser cutting to cut and shape the steel plate after cutting, and collect and treat the cutting exhaust gas and solid waste;

[0056] Step 3: Welding: Use robot welding to weld the cut steel plates;

[0057] Step 4: Heat treatment: heat treat the turntable after welding to eliminate welding stress;

[0058] Step 5: Rough machining: Rough machining is performed on the turntable after heat treatment, including turning, milling and drilling processes, and the noise and solid waste generated during the machining process are collected and treated;

[0059] Step 6: Secondary welding: perform secondary welding on the turntable after rough machining;

[0060] Step 7: Shot blasting: Shot blast the turntable after secondary welding;

[0061] Step 8: Painting: paint the turntable after shot blasting;

[0062] Step 9: Finishing: Finish the turntable after painting, including grinding and polishing processes;

[0063] Step 10: Warehousing: After the turntable has passed the inspection, it is put into storage for future use.

[0064] During the welding, secondary welding and shot blasting steps, the smoke generated is collected and processed. The smoke generated is sucked into a universal electrostatic welding smoke purifier for treatment by an exhaust fan. The electrostatic welding smoke purifier is connected to a muffler to avoid noise pollution.

[0065] Second embodiment: The steps of the robot welding are:

[0066] (1) First, build a three-dimensional model of the turntable based on the turntable design drawing;

[0067] (2) The steel plate is moved to the welding table and clamped, and the welding robot body moves the welding assembly to the top of the welding point of the steel plate to be welded through the weld seam tracking system;

[0068] (3) The welding robot uses the three-dimensional model to treat the steel plate to be welded. During the welding process, an inert gas is initially sprayed onto the steel plate to be welded. The inert gas can be argon;

[0069] (4) After the inert gas comes into contact with the parts to be welded, it will escape to the surroundings to avoid potential safety hazards during the welding process. At the same time, the exhaust gas and inert gas generated by welding are drawn into the processing mechanism through the exhaust mechanism.

[0070] A third embodiment: the heat treatment step of the steel plate includes a first tempering treatment and a second tempering treatment;

[0071] During the first tempering process, the steel plate is preheated at 400-450°C for 1.5-2 hours, then heated to 630-650°C, with a holding time of ≥3 min / mm, and cooled in air after leaving the furnace;

[0072] The heating temperature in the second tempering is 600-610° C., the holding time is 8-12 hours, and the temperature out of the furnace is ≤350° C.

[0073] During the second tempering process: during the heating process, above 350℃, the steel plate heating rate is controlled at 55~100℃ / h; during the cooling process, the steel plate cooling rate in the furnace is controlled at 55~100℃;

[0074] The loading and unloading temperature is ≤350℃, that is, the temperature of the steel plate when loading and unloading the furnace is ≤350℃. The specific implementation process is: the furnace temperature is raised to 350℃ or below 350℃, the steel plate is loaded into the furnace, heated and kept warm at 600-610℃, and then cooled to ≤350℃, and then the steel plate is taken out of the furnace and air-cooled.

[0075] Fourth embodiment: The shot blasting step of the turntable includes:

[0076] A: Transfer the turntable to the entrance roller of the shot blasting machine, and then inspect the shape and thickness of the turntable;

[0077] B: Shot blast the turntable according to the test results. During the shot blasting process, the roller speed of the shot blasting machine is 1.5-5m / s, the shot material ejection speed of the shot blasting machine is 70m / s-90m / s, and the diameters of the shot blasting machine include 1.2mm, 1.4mm and 1.7mm. The ratio of the three diameters of shot is 1.2mm:1.4mm:1.7mm=1:1:3;

[0078] C: Adjust the height of the large roller brush and the pre-scraper according to the detection data to clean the pellets on the surface of the turntable;

[0079] D: After shot blasting, the surface of the turntable is purged with compressed air, the pressure of the compressed air being 7 Bar to 9 Bar.

[0080] The fifth embodiment: during the painting process of the turntable, it is necessary to collect and treat the organic waste gas generated, which includes:

[0081] 1): Use the exhaust fan to absorb and collect the paint exhaust gas;

[0082] 2): Remove solid impurities from the paint spraying exhaust gas through the filter flame arrester to obtain completely gaseous exhaust gas;

[0083] 3): The completely gaseous waste gas is condensed at a temperature of 20-24°C, and the condensed liquid is removed to obtain the preliminarily toluene-free waste gas;

[0084] 4): The waste from the initial toluene removal is subjected to activated carbon adsorption treatment, and the adsorption-saturated activated carbon is regenerated by low-pressure steam.

[0085] Sixth embodiment: the finishing step of the turntable includes:

[0086] S1: Place the turntable under the grinding roller, and then use the electric field generator to charge the surface of the workpiece. If there are burrs on the surface of the workpiece, after the workpiece is charged, due to the principle of tip discharge, a large amount of charge will accumulate at the location of the burr and break through the air to be transferred to the detector;

[0087] S2: At this time, the surface of the turntable is ground by a grinding roller to remove burrs on the surface of the turntable;

[0088] S3: After the grinding is completed, the surface of the turntable is inspected again by the electric field generator and the detector. If there are still burrs on the surface of the turntable after the processing, the surface of the turntable is grinded again by the grinding roller until no burrs are detected on the turntable.

[0089] The present invention adopts a reasonable process flow to ensure that the turntable has excellent performance and meets the use requirements in the fields of oil extraction and the like.

[0090] At the same time, the contents not described in detail in this specification belong to the existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

[0091] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0092] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for manufacturing a turntable for oil drilling accessories, characterized in that: The following steps are involved: Step 1: Cutting: Cut the steel plate according to the turntable design drawing and perform dimensional inspection; Step 2: Cutting: Use plasma cutting or laser cutting to cut and shape the steel plate after cutting, and collect and treat the cutting waste gas and solid waste; Step 3: Welding: Use robot welding to weld the cut steel plates; Step 4: Heat treatment: heat treat the welded turntable to eliminate welding stress; Step 5: Rough machining: Rough machining is performed on the turntable after heat treatment, including turning, milling and drilling processes, and the noise and solid waste generated during the machining process are collected and processed; Step 6: Secondary welding: perform secondary welding on the turntable after rough machining; Step 7: Shot blasting: Shot blast the turntable after secondary welding; Step 8: Painting: spray paint the turntable after shot blasting; Step 9: Finishing: Finish the turntable after painting, including grinding and polishing processes; Step 10: Warehousing: After the turntable has passed the inspection, it is put into storage for future use.

2. The method for manufacturing a rotary plate of an oil drilling accessory according to claim 1, characterized in that: During the welding, secondary welding and shot blasting steps, the generated smoke is collected and processed, and the generated smoke is sucked into a universal electrostatic welding smoke purifier for processing by an exhaust fan. The electrostatic welding smoke purifier is connected to a muffler to avoid noise pollution.

3. The method for manufacturing a rotary plate of an oil drilling accessory according to claim 1, characterized in that: The steps of the robot welding are: (1) First, the three-dimensional model of the turntable is established based on the turntable design drawing; (2) The steel plate is moved to the welding table and clamped, and the welding robot body moves the welding assembly to the top of the welding point of the steel plate to be welded through the weld seam tracking system; (3) The welding robot uses the three-dimensional model to spray inert gas onto the steel plate to be welded during the welding process; (4) After the inert gas comes into contact with the parts to be welded, it escapes to the surroundings to avoid safety hazards during the welding process. At the same time, the exhaust gas and inert gas generated by welding are extracted into the treatment mechanism through the exhaust mechanism.

4. The method for manufacturing a rotary plate of an oil drilling accessory according to claim 1, characterized in that: The heat treatment step of the steel plate includes a first tempering treatment and a second tempering treatment; During the first tempering process, the steel plate is preheated at 400-450°C for 1.5-2 hours, then heated to 630-650°C, the holding time is ≥3 min / mm, and the cooling method is air cooling after leaving the furnace; The heating temperature in the second tempering is 600-610°C, the heat preservation time is 8-12 hours, and the temperature out of the furnace is ≤350°C.

5. The method for manufacturing a rotary plate of an oil drilling accessory according to claim 4, characterized in that: During the second tempering process, during the heating process, the heating rate of the steel plate is controlled at 55-100°C / h above 350°C; during the cooling process, the cooling rate of the steel plate in the furnace is controlled at 55-100°C; The loading and unloading temperatures are ≤350℃, that is, the temperatures of the steel plates when they are loaded into and taken out of the furnace are both ≤350℃. The specific implementation process is: the furnace temperature is raised to 350℃ or below 350℃, the steel plates are loaded into the furnace, heated and kept at 600-610℃, then cooled to ≤350℃, and then the steel plates are taken out of the furnace and air-cooled.

6. The method for manufacturing a rotary plate of an oil drilling accessory according to claim 1, characterized in that: The shot blasting step of the turntable comprises: A: Transfer the turntable to the entrance roller of the shot blasting machine, and then inspect the shape and thickness of the turntable; B: Shot blast the turntable according to the test results. During the shot blasting process, the roller speed of the shot blasting machine is 1.5-5m / s, and the shot material ejection speed of the shot blasting machine is 70m / s-90m / s; C: Adjust the height of the large roller brush and the pre-scraper according to the detection data to clean the pills on the surface of the turntable; D: After shot blasting, the surface of the turntable is purged with compressed air.

7. The method for manufacturing a rotary plate of an oil drilling accessory according to claim 1, characterized in that: During the painting process of the turntable, the organic waste gas generated needs to be collected and processed, which includes: 1): Use the exhaust fan to absorb and collect the paint exhaust gas; 2): Remove solid impurities in the paint spraying exhaust gas through the filter flame arrester to obtain completely gaseous exhaust gas; 3): The completely gaseous waste gas is condensed at a temperature of 20 to 24°C, and the condensed liquid is removed to obtain the preliminary toluene-free waste gas; 4): The initial toluene removal waste is subjected to activated carbon adsorption treatment, and the adsorption saturated activated carbon is regenerated by low-pressure steam.

8. The method for manufacturing a rotary plate of an oil drilling accessory according to claim 1, characterized in that: The finishing step of the turntable comprises: S1: Place the turntable under the grinding roller, and then use the electric field generator to charge the surface of the workpiece. If there are burrs on the surface of the workpiece, after the workpiece is charged, due to the tip discharge principle, a large amount of charge will be gathered at the location of the burr, and will break through the air and be transferred to the detector; S2: Grinding the surface of the turntable by a grinding roller to remove burrs on the surface of the turntable; S3: After the grinding is completed, the surface of the turntable is detected again by the electric field generator and the detector. If there are still burrs on the surface of the turntable after the processing, the surface of the turntable is ground again by the grinding roller until no burrs are detected on the turntable.

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