WO2010113948A1 - 鋼管のねじ部への潤滑剤塗布装置および塗布方法 - Google Patents
鋼管のねじ部への潤滑剤塗布装置および塗布方法 Download PDFInfo
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- WO2010113948A1 WO2010113948A1 PCT/JP2010/055706 JP2010055706W WO2010113948A1 WO 2010113948 A1 WO2010113948 A1 WO 2010113948A1 JP 2010055706 W JP2010055706 W JP 2010055706W WO 2010113948 A1 WO2010113948 A1 WO 2010113948A1
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- Prior art keywords
- lubricant
- steel pipe
- spray gun
- spray
- pipe
- Prior art date
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- 239000000314 lubricant Substances 0.000 title claims abstract description 246
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 171
- 239000010959 steel Substances 0.000 title claims abstract description 171
- 238000000034 method Methods 0.000 title claims description 11
- 239000007921 spray Substances 0.000 claims abstract description 158
- 238000005507 spraying Methods 0.000 claims abstract description 40
- 239000003921 oil Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 7
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- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
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- 229910002804 graphite Inorganic materials 0.000 description 1
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- 230000000087 stabilizing effect Effects 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 150000008054 sulfonate salts Chemical class 0.000 description 1
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- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
- B05B13/0442—Installation or apparatus for applying liquid or other fluent material to separate articles rotated during spraying operation
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/006—Accessories for drilling pipes, e.g. cleaners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
- F16N7/38—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
- B05B13/0645—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies the hollow bodies being rotated during treatment operation
- B05B13/0654—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies the hollow bodies being rotated during treatment operation and a treating nozzles being translated through the hollow bodies in a direction essentially parallel to the rotational axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/002—Processes for applying liquids or other fluent materials the substrate being rotated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2254/00—Tubes
- B05D2254/02—Applying the material on the exterior of the tube
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2254/00—Tubes
- B05D2254/04—Applying the material on the interior of the tube
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N2210/00—Applications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N2270/00—Controlling
- F16N2270/20—Amount of lubricant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
- F16N7/30—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated the oil being fed or carried along by another fluid
- F16N7/32—Mist lubrication
- F16N7/34—Atomising devices for oil
Definitions
- the present invention relates to an apparatus and a method for applying a lubricant to a threaded portion of a steel pipe. More specifically, the present invention relates to a threaded pipe joint formed on a pipe end of a steel pipe, that is, formed on an outer surface of the pipe end. The present invention relates to a lubricant application apparatus and application method suitable for applying a highly viscous liquid (semi-dry) type lubricant to the surface of a male screw part and an internal thread part formed on the inner surface.
- a highly viscous liquid (semi-dry) type lubricant to the surface of a male screw part and an internal thread part formed on the inner surface.
- Oil well pipes such as tubing and casings used for oil well drilling are assembled to the required length by sequentially fastening steel pipes with a length of about a dozen meters on site with pipe threaded joints.
- This pipe thread joint generally has a pin-box structure using a pin which is one joint element having a male thread portion and a box which is the other mating joint element having a female thread portion.
- Coupling type threaded joints typically used for fastening oil well pipes have pins formed on the outer surfaces of the pipe ends on both sides of the steel pipe that will become the oil well pipe, and on both sides of a short separate joint member called a coupling.
- a box is formed on the inner surface.
- An integral type threaded pipe joint may be employed in which a pin is formed on the outer surface of one end of the steel pipe and a box is formed on the inner surface of the other end.
- the normal oil well depth is 2000-3000m, but in recent deep oil wells such as offshore oil fields, the depth can reach 8000-10000m and even more. Therefore, pipe threaded joints used for fastening oil well pipes are subjected to pressure and heat combined with internal and external pressures in addition to the axial tensile force due to the weight of the oil well pipes and the joints themselves in the operating environment. Therefore, it is required that the airtightness can be maintained without being damaged even in a severe use environment. Also, when the tubing or casing is lowered, the joint once tightened may be loosened and retightened.
- the tubing joint is tightened 10 times, and the casing joint is tightened 3 times ( Even if makeup (makeup) and loosening back (breakout) are performed, it is required that airtightness is maintained without causing irreparable seizure called goling.
- both the pin and the box are equipped with a screw-free metal contact part in addition to the screw part, and the screw-free metal contact parts of the pin and the box are in direct contact with each other to form a metal seal and have excellent airtightness.
- the unthreaded metal contact portion of the pin is composed of a metal seal surface located on the tip side of the screw portion on the outer peripheral surface of the pin and a torque shoulder surface on the tip of the pin.
- a metal seal surface and a torque shoulder surface are also provided on the inner peripheral surface of the box.
- the surface where the pin and the box come into contact with each other during tightening (hereinafter simply referred to as the “contact surface of the threaded joint”), such as the threaded part of a threaded joint for oil well pipes and the unthreaded metal contact part, is seized.
- a high-viscosity liquid lubricant called dope or compound grease (hereinafter referred to as ⁇ dope '') is generally used before shipment to improve contact and airtightness and protect this contact surface from rusting until use. Applied.
- a relief portion called a recess or chamfer cut into a taper shape is provided on the end surface of the pin serving as a joint surface, that is, on the inner surface side of the end surface of the steel tube.
- the dope is also applied to the recess portion of the pin for the purpose of preventing rust.
- the dope is applied not only to the outer surface and the end surface of the steel pipe, which is the contact surface with the box, but also to the inner surface of the steel pipe where the recess portion is formed, at the pipe end portion of the steel pipe to be the pin.
- the conventional dope contains a large amount of heavy metal powder such as Pb and Zn in order to ensure lubricity and rust prevention (corrosion resistance).
- the dope is usually applied by brushing, that is, by applying an appropriate amount to the contact surface of the threaded joint and then extending with a brush.
- a lubricant applying device including a nozzle head for injecting the lubricant and a brush for extending the injected lubricant Is disclosed.
- the completely dry type is a solid lubricating film in which a lubricating powder is typically dispersed in an inorganic or organic resin binder. Since this lubricating coating does not have fluidity, the coating may be damaged when subjected to high surface pressure by tightening the pipe threaded joint, and seizure occurs at that portion, resulting in poor lubricity.
- a lubricating film formed from a semi-dry type lubricant has excellent lubricity because the film flows when it is subjected to a high surface pressure during tightening and flows around a location where the lubricant is insufficient. However, since the lubricant that protrudes during tightening may be released to the ocean, the environment is inferior to the completely dry type.
- the semi-dry type when importance is attached to lubricity (seizure resistance), the semi-dry type is advantageous.
- seizure resistance when importance is attached to lubricity (seizure resistance), the semi-dry type is advantageous.
- seizure is likely to occur in the metal seal portion. Therefore, a semi-dry type lubricant excellent in seizure resistance and airtightness is suitable.
- Patent Document 3 as a highly viscous liquid lubricant that is also referred to as green dope and has low harmfulness, one or more basic substances selected from basic sulfonates, basic salicylates, basic phenates, and basic carboxylates are used.
- a lubricant containing an oil and having a biodegradability (BOD, biological oxygen demand) after 20 days in seawater of 20% or more is disclosed.
- this lubricant is at least one other oil agent (preferably one or more selected from fatty acid metal salts and waxes) having a higher biodegradability than a basic oil agent, and It is also disclosed that a volatile organic dissolving base may be further contained as necessary.
- the “highly viscous liquid” lubricant means a lubricant whose viscosity at room temperature is too high to be sprayed as it is, and viscosity adjustment is necessary for spraying.
- Patent Document 1 Japanese Patent Laid-Open No. 58-219964
- Patent Document 2 Japanese Patent Laid-Open No. 62-61667
- Patent Document 3 US 2009/0264326 A1
- green dope is required to suppress the amount of lubricant protruding as much as possible at the time of tightening the pipe thread joint, in order to reduce environmental pollution, especially marine pollution, as much as possible, even if its toxicity is low.
- the range of the green dope coating amount is set to be quite narrow.
- the lubricant application devices disclosed in Patent Documents 1 and 2 both apply the lubricant in a thin and uniform manner to apply the lubricant to the pins and boxes at the end of the tube using a brush. Has its limits. There is a slight difference in the thickness of the adhered lubricant between the part where the brush bristles hit and the part where it does not hit, especially in the thread, the brush bristles hit strongly, so the lubricant rubs and thins, and the brush is used. This is because, in the applied coating, there is a limit to reducing the coating thickness itself. As described above, since a highly viscous liquid lubricant such as a dope including a green dope has a very high viscosity, it was actually impossible to apply it with a thin thickness of, for example, 10 ⁇ m or less.
- An object of the present invention is to provide a steel pipe capable of thinly and uniformly applying a highly viscous lubricant having high viscosity to a surface of a thread portion formed at a pipe end of a long steel pipe with a controlled adhesion amount. It is providing the lubrication agent application apparatus and application method to the thread part of this.
- the present invention is an apparatus for applying a lubricant to a thread portion provided on an outer surface or an inner surface of a steel pipe end portion constituting a pin or box of a pipe thread joint, and (a) rotating the steel pipe around its central axis A steel pipe support device that supports the steel pipe, and (b) a tank that stores a lubricant adjusted to a sprayable viscosity, a pipe through which the lubricant circulates, and a pump that circulates the lubricant in the pipe.
- a lubricant circulation system comprising a metering pump for metering the lubricant circulating in the lubricant circulation system; and (d) sending a lubricant metered from the metering supply device.
- a lubricant supply path an air supply path for sending air for spraying independently from the lubricant supply path, and a lubricant atomized by the air from the nozzle at the tip to the screw portion of the steel pipe
- At least one A lubricant spraying device having a Reagan and having a junction of a lubricant supply path and an air supply path in the vicinity of the nozzle; and (e) supporting the spray gun movably in the axial direction and / or the radial direction of the steel pipe.
- a spray gun support device having a Reagan and having a junction of a lubricant supply path and an air supply path in the vicinity of the nozzle; and (e) supporting the spray gun movably in the axial direction and / or the radial direction of the steel pipe.
- the preferred embodiments of the lubricant application device for the threaded portion of the steel pipe according to the present invention are listed as follows.
- the metering pump is a rotary plunger pump.
- the spray gun support device supports the spray gun in a tiltable manner with respect to the threaded portion of the steel pipe.
- the lubricant contains one or more basic oils selected from basic sulfonates, basic salicylates, basic phenates and basic carboxylates, and is biodegradable (BOD) after 28 days in seawater. ) Is 20% or more.
- the viscosity of the lubricant is adjusted by diluting the lubricant with a volatile dissolving base material or heating the lubricant.
- the tank has an agitation mechanism for agitating the lubricant contained in the tank.
- the major axis of the spray pattern of the lubricant sprayed from the spray gun on the steel pipe surface is L (mm)
- the rotational speed of the steel pipe is n (rpm)
- the number of nozzles in the axial direction of the steel pipe is m (pieces).
- the moving speed of the spray gun in the axial direction by the spray gun support device is V (mm / min)
- the steel pipe is such that the relationship of formula (1): V ⁇ m ⁇ n ⁇ L is satisfied.
- the apparatus further includes a control device for controlling the rotation speed of the steel pipe by the support device and the moving speed of the spray gun by the spray gun support device.
- the present invention is a method of applying a lubricant to a thread portion provided on an outer surface or an inner surface of an end portion of a steel pipe constituting a pin or box of a pipe thread joint, which can be sprayed on a spray gun.
- spray air is supplied separately from this lubricant, and the supplied lubricant and spray air are supplied near the nozzle at the tip of the spray gun.
- Lubricant mixed and atomized by mixing with atomizing air from a spray gun nozzle that moves at least in the axial and / or radial direction of the steel pipe supported while rotating about the central axis, It sprays toward the thread part of a steel pipe.
- a highly viscous liquid lubricant with a thickness that is about (1/10) thinner than before and uniformly applied It becomes possible to apply.
- FIG. 3 (a) is an explanatory view schematically showing a situation in which the lubricant is sprayed with two spray guns oriented at right angles to the thread surface
- FIG. 3 (b) is a diagram showing two spray guns on the thread surface.
- It is explanatory drawing which shows typically the condition which inclines with respect to a different angle and sprays a lubricant.
- Explanatory drawing which shows the injection condition to the screw thread by the inclined injection angle.
- FIG. 1 is an explanatory view schematically showing a configuration of a lubricant application device for a threaded portion of a steel pipe according to the present invention.
- a steel pipe P for example, a steel pipe for an oil well pipe or a riser pipe
- the male thread portion 8a constitutes a pin of a pipe thread joint.
- the female thread portion 8b constitutes a box of a pipe thread joint.
- the male screw portion 8a is referred to as a pin
- the female screw portion 8b is referred to as a box.
- FIG. 1 shows the inside and outside of the pipe end 8 of the steel pipe P for convenience of explanation to show that the lubricant application apparatus according to the present invention can apply the lubricant to both the pin and the box of the pipe thread joint. It is shown having threads on both sides.
- a taper-shaped recess is formed on the end face of the pin of the pipe thread joint, that is, the inner face side of the end face of the steel pipe P, instead of the threaded portion as shown in FIG. Often done (see FIG. 2).
- the lubricant application device according to the present invention can apply the lubricant not only to the outer surface of the pin, that is, the end portion of the steel pipe tube, but also to the recess on the inner surface side. That is, the lubricant application device according to the present invention applies the lubricant not only to the inner or outer threaded portion of the pipe end of the steel pipe (pin or box in the case of a pipe thread joint) but also to the opposite surface of the pipe end. can do.
- the lubricant application device 1 includes a steel pipe support device 2, a lubricant circulation system 3, a lubricant fixed amount supply device 4, a lubricant spray device 5, a spray gun support device 6, and preferably Is further provided with a control device 7, so these components will be described in sequence.
- the steel pipe support device 2 is for supporting a steel pipe P having a pin 8a or a box 8b, which is a threaded portion engraved at the pipe end, while rotating around the central axis in the direction of the arrow in FIG. is there.
- the lubricant circulation system 3 stabilizes the flow of the lubricant 9 by circulating the lubricant 9 adjusted to a viscosity suitable for spraying, and thereby the lubricant sprayed from the lubricant spraying device 5 described later. Thus, the quantitativeness of the discharge amount of 9 is improved.
- a lubricant circulation system 3 shown in FIG. 1 has a tank 10 for storing a lubricant 9 adjusted to a sprayable viscosity, a pipe 11 through which the lubricant 9 circulates, and a lubricant flowing through the pipe 11. And a pump 12 capable of
- the lubricant 9 used is capable of forming a highly viscous liquid (semi-dry) lubricating film.
- the high-viscosity liquid lubricant is a green dope that has little adverse effect even if it flows into the environment, and more preferably, the basic sulfonate and the basic salicylate described in Patent Document 3 (incorporated herein) described above. , Containing one or more basic oils (preferably Ca salt) selected from basic phenates and basic carboxylates, and having a biodegradability (BOD) after 20 days in seawater of 20% or more Green dope.
- basic oils preferably Ca salt
- the lubricant is diluted with a volatile dissolving base material or the lubricant is heated.
- a volatile dissolving base examples include: petroleum solvent (dissolving base): 20-30%, petroleum wax: 5-10%, rosin: 5-10%, Graphite: 3-5%, balance: basic Ca sulfonate salt (basic oil).
- One example of a diluted lubricant having the above composition is commercially available from Daido Chemical Co., Ltd. under the product name CWSD EVS.
- the tank 10 is provided with a known stirring mechanism 10a for stirring the lubricant 9 accommodated in the tank 10.
- the lubricant 9 contained in the tank 10 is agitated by the agitating mechanism 10a, thereby stabilizing the lubricant 9 and thereby improving the quantitativeness of the discharge amount of the lubricant 9 sprayed from the lubricant spraying device 5 described later. Can be increased.
- the pipe 11 is provided with a three-way valve 13, and an electromagnetic valve 14 is provided in one flow path connected to the three-way valve 13.
- an electromagnetic valve 14 is provided in one flow path connected to the three-way valve 13.
- the metering supply device 4 is a device for metering the viscosity-adjusted lubricant 9 circulating in the lubricant circulation system 3 and includes a metering pump.
- a rotary plunger pump is used as the metering pump, but other types of metering pumps can be used as long as the metered supply of a viscous liquid that can be sprayed is possible.
- the metering supply device 4 includes a first metering pump 4a for metering the lubricant to the first lubricant spraying device 5a for applying the lubricant 9 to the pin 8a (the outer surface of the tube end), and a box 8b (pipe). And a second metering pump 4b for quantitatively supplying the lubricant to the second lubricant spraying device 5b for applying the lubricant 9 to the inner surface of the end.
- Both the first metering pump 4a and the second metering pump 4b are rotary plunger pumps that can control the discharge rate in proportion to the rotational speed in order to control the supply amount of the lubricant 9. is there.
- the first metering pump 4a is controlled by a servo motor 4c
- the second metering pump 4b is controlled by a servo motor 4d.
- the lubricant spraying device 5 in the present invention is atomized instead of extending the lubricant 9 with a brush and applying it to the pin 8a or the box 8b as in the lubricant applying device disclosed in Patent Documents 1 and 2.
- the first lubricant spraying device 5a for applying the lubricant 9 to the pin 8a and the box 8b A second lubricant spraying device 5b for applying the lubricant 9;
- the first lubricant spraying device 5a sends lubricant air for spraying independently from the lubricant supply passages 15a and 16a for sending the lubricant 9 quantitatively supplied from the first metering pump 4a.
- the lubricant supply passages 15a, 16a and the air supply passages 17a, 18a join at a joining portion (not shown) that is located in the vicinity of the tip nozzles 19a, 20a of the spray guns 19, 20, whereby the lubricant 9 is The atomized lubricant 9 is sprayed from the nozzles 19a and 20a at the tip toward the pin 8a of the steel pipe P.
- the second lubricant spraying device 5b is supplied from the second metering pump 4b.
- the spray gun 23 sprays the lubricant 9 from the nozzle 23a at the tip toward the box 8b of the steel pipe P.
- the lubricant is atomized by joining at a junction (not shown) located in the vicinity of the lubricant supply path 21a, the air supply path 22a, and the tip nozzle 23a, and the atomized lubricant is sprayed from the nozzle.
- the lubricant spraying device has one or two spray guns, but three or more spray guns can be installed in the spraying device.
- the spray guns 19 and 20 for spraying the lubricant onto the pins are installed at different positions only in the axial direction, but should be installed at different positions in the circumferential direction or both in the axial direction and the circumferential direction. Is also possible.
- Both the first lubricant spraying device 5a and the second lubricant spraying device 5b are configured to atomize the lubricant 9 adjusted to a sprayable viscosity into a uniform mist by air pressure, and then by air pressure. It sprays toward the pin 8a or the box 8b of the steel pipe P using the nozzle 19a, 20a or 23a which can be opened and closed. Thereby, the quantity of the lubricant 9 sprayed from the lubricant spraying device 5 described later can be kept constant.
- the spray gun support device 6 is a device having a function of supporting the spray guns 19, 20, and 23 movably in the axial direction and / or the radial direction of the steel pipe P.
- the apparatus further has a function of supporting the spray gun 23 so as to be tiltable with respect to the box 8b.
- the spray gun support device 6 may further have a function of supporting the spray guns 19 and 20 so as to be tiltable with respect to the pins 8a.
- the spray gun support device 6 includes a first spray gun support device 24 that supports the spray guns 19 and 20, and a second spray gun support device 25 that supports the spray gun 23.
- the first spray gun support device 24 is disposed above the steel pipe P, and the axial movement ball screw 24a for moving the support portion 24f of the spray guns 19 and 20 in the axial direction of the steel pipe P, and the axial movement.
- Servo motor 24b for axial movement that drives the ball screw 24a, base plate 24c for mounting the axial movement ball screw 24a, and radial movement for supporting the base plate 24c in a radial direction of the steel pipe P.
- a ball screw 24d and a radial movement servomotor 24e for driving the radial movement ball screw 24d are provided.
- the radial movement ball screw 24d is fixedly supported on the front surface of a rectangular parallelepiped main body 27 configured to be movable forward and backward by a main body forward / backward movement air cylinder 26.
- the spray guns 19 and 20 are arranged so as to be movable in the axial direction and the radial direction of the steel pipe P, and the moving amount and moving speed thereof are accurately controlled to desired values by the servo motors 24b and 24e.
- the position of the nozzles 19a, 20a in the radial direction of the pin 8a of the steel pipe P, that is, the height of the spray guns 19, 20 is such that the major axis of the injection of the lubricant 9 on the surface of the pin 8a of the steel pipe P is a predetermined value L.
- the servo motor 24e is set so that
- the second spray gun support device 25 is disposed on the side of the end of the steel pipe P, and the axial movement ball screw 25a for supporting the support 25f of the spray gun 23 in the axial direction of the steel pipe P;
- a direction moving ball screw 25d and a radial direction moving servo motor 25e for driving the radial direction moving ball screw 25d are provided.
- the support portion 25f is provided with a through screw 25g for adjusting the inclination angle of the spray gun 23 with respect to the surface of the box 8b.
- the radial movement ball screw 25d is fixedly supported on the front surface of a rectangular parallelepiped main body 27 configured to be movable forward and backward by a main body forward / backward movement air cylinder 26.
- the spray gun 23 is arranged so as to be movable in the axial direction and the radial direction of the steel pipe P, and the moving amount and moving speed thereof are accurately controlled to desired values by the servo motors 25b and 25e. Further, the position of the nozzle 23a in the radial direction of the box 8b of the steel pipe P, that is, the height of the spray gun 23 is a position where the injection major axis of the lubricant 9 on the surface of the box 8b of the steel pipe P becomes a predetermined value L.
- the servo motor 25e is set so that
- the distance between the nozzles 19a, 20a and the pin 8a and the distance between the nozzle 23a and the box 8b are too close, the nozzles 19a, 20a, 23a and the steel pipe P may come into contact with each other. There is a possibility that the lubricant 9 is scattered and a desired film thickness cannot be obtained. For this reason, it is better to be as close as possible within a range where no equipment interference occurs.
- the distance between the nozzles 19a, 20a and the pin 8a and the distance between the nozzle 23a and the box 8b are preferably 30 mm or more and 80 mm or less, respectively.
- the spray angle of the jet flow from the nozzle is preferably about 5 to 15 °.
- FIG. 2 is an explanatory view showing the cross-sectional shape of the pin 8a of the steel pipe P.
- the male screw formed on the pin 8 a has a thread surface 8 d parallel to the outer surface 8 c of the steel pipe P (forming the screw bottom surface of the male screw) and a surface perpendicular to the outer surface 8 c of the steel pipe.
- the inclination angles of the insertion surface 8e and the load surface 8f are examples and can vary.
- the inclination angle of the load surface may take 0 ° or a positive value.
- the side surface 8e having a positive inclination angle is referred to as a P side surface
- the side surface 8f having a negative inclination angle is referred to as an N side surface.
- FIG. 3 (a) is an explanatory view schematically showing a state in which the lubricant 9 is sprayed with the spray guns 19 and 20 oriented at right angles to the thread surface 8d, and FIG. It is explanatory drawing which shows typically the condition which inclines 20 with respect to a screw surface, and sprays the lubricant 9.
- FIG. 3A and 3B, the left-pointing arrow indicates the axial movement direction of the spray guns 19 and 20.
- the thread shape is similar to that shown in FIG.
- the spray gun 19 is inclined about 20 to 40 ° toward the end of the steel pipe P (rightward in FIG. 3 (b)), and the spray gun 20 is moved away from the steel pipe P.
- the lubricant 9 By spraying the lubricant 9 on the same male thread in a state inclined about 20 to 40 ° toward the end side (leftward in FIG. 3B), the thread bottom surface 8c, the thread surface 8d, the P side surface 8e, and The lubricant 9 can be uniformly applied to any of the N side surfaces 8f.
- the lubricant injection direction angle ⁇ (angle formed by the spray nozzle and a plane perpendicular to the tube axis) and the thread shape (the height of the thread and the inclination angle of both sides) as shown in FIG.
- the screw bottom surface and the side surface there are generated a surface on which the injected lubricant hits and a surface that is shaded by the thread-shaped interference and does not hit the lubricant.
- the screw bottom surface and the P side surface are shaded.
- the angle which each surface makes with the injection direction changes, the projected area on the surface changes, and the applied film thickness changes.
- the N side surface and the P side surface are shadowed at about 0 ° and cannot be applied. If the nozzle of the spray gun 19 is tilted from 20 ° to 40 ° and the nozzle of the spray gun 20 is inclined from ⁇ 20 ° to ⁇ 40 °, it can be applied to each side effectively, and it can be applied almost uniformly to all sides of the thread. It turns out that you can.
- the spray gun supporting device 6 is used to atomize the lubricant 9 adjusted to a sprayable viscosity to be uniformly atomized by air pressure, and the nozzle 19a, 20a or 23a that can be opened and closed by air pressure. Used to spray toward the pin 8a or the box 8b of the steel pipe P.
- the spray guns 19, 20, 23 may be supported by, for example, a general-purpose articulated robot. . Thereby, each spray gun can be tilted.
- Control device 7 The control device 7 is not necessarily provided, but is desirably provided in order to stabilize the spray state of the lubricant 9.
- the control device 7 uses the turning roller 2a, 2b as the major diameter of the spray pattern of the lubricant 9 sprayed conically from the spray gun 19, 20 or 23 on the pin 8a or the box 8b (steel pipe surface) L (mm).
- the rotation speed of the steel pipe P is n (rpm)
- the number of nozzles in the axial direction of the steel pipe P is m (pieces)
- the axial movement speed of the spray gun 19, 20 or 23 in the axial direction by the spray gun support device 6 is V. (Mm / min)
- the rotation speed of the steel pipe P by the steel pipe support device 2 and the spray guns 19 and 20 by the spray gun support device 6 so that the relationship expressed by the following formula (1) is satisfied.
- 23 has a function of controlling the moving speed in the axial direction.
- the lubricant application device 1 includes nozzles 19a and 20a of spray guns 19 and 20 that move in the axial direction of the steel pipe P with respect to the pins 8a of the steel pipe P that rotate in the direction of the arrow by the turning rollers 2a and 2b.
- the lubricant 9 adjusted to a sprayable viscosity is sprayed conically from the nozzle 23a of the spray gun 23 onto the box 8b, so that the lubricant 9 is spirally applied to the pin 8 of the steel pipe P or the box 8b. Is applied.
- the moving speed V of the spray gun 19, 20 or 23 in the axial direction exceeds the above-described value (m ⁇ n ⁇ L)
- the axial direction of the steel pipe P is interposed between the spiral coating films. Non-painted parts are formed intermittently.
- the productivity decreases and the coating thickness of the lubricant 9 becomes too large and is applied to the pin 8 a or the box 8 b.
- the lubricant 9 may flow.
- the lubricant supply amount q (ml / sec) the outer diameter D (cm) of the steel pipe P, and the adhesion efficiency ⁇
- q W ⁇ ⁇ D ⁇ V ⁇ ⁇
- the total lubricant supply amount q is set to 0.1 to 0.6 (ml / sec) and the moving speed V is set to 4 to 12 (mm / sec) as long as the relationship of the expression (2) is satisfied. Is exemplified.
- spray guns 19 and 20 for injecting the lubricant 9 to the pins 8 a of the steel pipe P are provided in the axial direction of the steel pipe P. It is desirable to arrange a plurality of (two in the illustrated example). Thereby, it becomes easy to increase the moving speed V of the spray guns 19 and 20.
- the range in which the lubricant 9 is sprayed on the box 8b of the steel pipe P is such that it can be covered by moving and spraying one spray gun 23 in the axial direction of the steel pipe P in a normal case. Often short. For this reason, when the spray pattern of one spray gun 23 can be sufficiently applied, only one spray gun 23 needs to be arranged. Of course, if the spray pattern of one spray gun 23 cannot be applied completely or if it is desired to increase the productivity of the application, a spray gun for injecting the lubricant 9 into the box 8b of the steel pipe P is used as the shaft of the steel pipe P. Needless to say, a plurality of them may be arranged in the direction.
- the spray guns arranged at different positions in the axial direction have some overlapping of the plurality of jet streams on the surface of the steel pipe, and there are uncovered portions between the jet streams. It is preferable not to appear.
- the wet film thickness of the lubricant 9 in the pin 8a or the box 8b of the steel pipe P is desirably 6 ⁇ m or more and 8 ⁇ m or less in order to obtain good lubrication without protruding.
- the lubricant application device 1 according to the present invention can form a film of the lubricant 9 having an arbitrary film thickness, and the relationship of the above-described formula (2) may be satisfied.
- control device 7 By using the control device 7, it is possible to improve the quantitativeness of the spray amount of the lubricant 9 sprayed from the lubricant spray device 5.
- controller 7 to control all movements such as application device body movement, nozzle axial and radial movement, steel pipe rotation, pump rotation or other movement, injection on / off Can do.
- the lubricant application device 1 is configured as described above. Next, an example of a method of applying the lubricant 9 to the pin 8a at the pipe end portion of the steel pipe P using the lubricant application device 1 will be described. First, on the turning rollers 2a and 2b, a steel pipe P having a pin 8a which is a threaded portion engraved at the pipe end is mounted and set, and the turning rollers 2a and 2b are driven to rotate in the direction of the arrow in FIG. By doing so, the steel pipe P is rotated in the direction of the arrow in FIG.
- a highly viscous liquid lubricant (green dope with a BOD of 20% or more after 28 days in seawater) diluted with a volatile dissolving base material in the tank 10 of the lubricant circulation system 3 to a sprayable viscosity.
- the adjusted lubricant 9 eg, CWSD EVS manufactured by Daido Chemical Industries, Ltd.
- the lubricant 9 in the tank 10 is stirred by the stirring mechanism 10a.
- the lubricant 9 is circulated in the lubricant circulation system 3 by starting the pump 12 after setting the cock of the three-way valve 13 to the circulation side. Thereafter, by switching the electromagnetic valve 14, it is selected to apply the lubricant 9 to the pin 8a, and to supply a predetermined amount to the first lubricant spraying device 5a for applying the lubricant 9 to the pin 8a.
- the first metering pump 4a is started. Thereby, the lubricant 9 is supplied to the first metering pump 4a.
- the first metering pump 4a quantitatively supplies the lubricant 9 to the spray guns 19 and 20 through the lubricant supply paths 15a and 16a, and sprays the spray guns 19 and 20 from an air supply system for spraying (not shown). Is supplied via the air supply paths 17a and 18a. Lubricant 9 and spraying air supplied to the spray guns 19 and 20 are mixed in the vicinity of the nozzles 19a and 20a at the tip of the spray guns 19 and 20, and are atomized by mixing with the spraying air. The agent 9 is sprayed toward the pin 8a of the steel pipe P through the nozzles 19a and 20a.
- the first spray gun support device 24 is activated, and the spray guns 19 and 20 arranged at a predetermined inclination angle with respect to the pin 8a are moved in a predetermined direction in the axial direction of the steel pipe P. While moving at a moving speed V ⁇ m ⁇ n ⁇ L, the steel pipe P is moved at a predetermined moving speed in the radial direction.
- the rotation speed of the steel pipe P by the steel pipe support device 2 and the axial movement speed of the spray guns 19 and 20 by the first spray gun support device 24 are preferably controlled by the control device 7.
- the lubricant 9 can be sprayed toward the pin 8a of the steel pipe P supported while rotating around the central axis.
- the film thickness of the lubricant 9 on the pin 8a of the steel pipe P is not protruding. Instead, the film thickness can be controlled so as to obtain good lubrication.
- the lubricant application device can be designed to apply the lubricant simultaneously to the inner surface and the outer surface of the pipe end of the steel pipe. Therefore, for example, the lubricant can be applied simultaneously to the pin on the outer surface side of the pipe end of the steel pipe and the recess portion on the inner surface side.
- the pin 8a or the box 8b of the steel pipe P particularly the pin 8a that is typically formed at the end of the long steel pipe P and is more difficult to apply.
- the green dope which is a highly viscous liquid lubricant, is applied thinly and uniformly to the surface of the surface, specifically, with a thickness that is about (1/10) thinner than before and It becomes possible for the first time to apply uniformly.
- the supply amount of the lubricant 9 by the first metering pump 4a or the supply amount of the lubricant 9 by the second metering pump 4b is controlled.
- the circulation amount of the lubricant 9 by the pump 12 controls the rotation speed of the steel pipe P by the steel pipe support device 2 and the movement speed of the spray guns 19 and 20 by the first spray gun support device 24 or the second spray gun.
- the lubricant is applied to the pin 8a or the box 8b of the steel pipe P with a desired film thickness regardless of the outer diameter of the steel pipe P. It is possible to apply the.
- a highly viscous liquid lubricant 9 (CWSD EVS manufactured by Daido Chemical Industries, Ltd.) whose viscosity was adjusted by dilution was applied to the pins 8a formed on the ends of the 17 steel pipes P.
- the thread shape of the pin of each steel pipe was as shown in FIG.
- the nozzles of the spray guns 19 and 20 used for applying the lubricant to the pins were both oriented at right angles to the steel pipe surface (thread surface). That is, the spray angles of the spray gun nozzles as shown in FIG. 3 (b) were not different from each other, but had the same spray angle as shown in FIG. 3 (a). In this case, the two spray guns are used apart from each other in the tube axis direction in order to increase the coating efficiency. In this case, the installation interval of the spray guns 19 and 20 in the axial direction of the steel pipe P prevents the non-painted portion in the axial direction of the steel pipe P from being intermittently formed between the spiral coating films. In order to overlap 15% (30% on both sides) of the injection long diameter L, the injection long diameter L at the pin 8a of the lubricant 9 injected conically from the spray guns 19 and 20 is 20 mm. It was.
- the discharge amount V of the first metering pump 4a was 8.65 g / min
- the rotation speed of the first metering pump 4a was 25.44 rpm
- a coating amount is calculated
- the coating tolerance (Min, Max and median, unit: g) is a tolerance of the total coating amount, and was obtained by actual measurement.
- the results are summarized in Table 1.
- symbol WT in Table 1 shows the thickness of a pipe
- symbol T / R shows a turning roller
- a metering pump shows the 1st metering pump 4a (rotary plunger pump with variable rotation speed).
- the pump constant means a discharge amount per one rotation of the pump, and the pump constant and the pump rotational speed are also values of the first metering pump 4a.
- the lubricant application device 1 includes a supply amount of the lubricant 9 by the first metering pump 4a, a circulation amount of the lubricant 9 by the pump 12, nozzles 19a and 20a, and a pin. If the distance to 8a and the angle at the time of spraying to the spray guns 19 and 20 are both constant at predetermined values, the control device 7 causes the steel pipe support device 2 to rotate and the first spray. The lubricant 9 is applied to the pins 8a of the steel pipe P with a desired film thickness that satisfies the tolerance, regardless of the outer diameter of the steel pipe P, by simply controlling the moving speed of the spray guns 19 and 20 by the gun support device 24. You can see that
- the fine adjustment of the coating thickness can also be easily performed by changing the number of revolutions of the first metering pump 4a and changing the supply amount of the lubricant 9.
- a highly viscous liquid is applied to the surface of a pin or box of a pipe threaded joint, particularly a pin that is typically formed at the end of a long steel pipe and is more difficult to apply.
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Abstract
Description
特許文献1:特開昭58-219964号公報
特許文献2:特開昭62-61667号公報
特許文献3:US2009/0264326A1
・前記定量ポンプがロータリー式プランジャーポンプである。
・前記潤滑剤が、塩基性スルホネート、塩基性サリシレート、塩基性フェネートおよび塩基性カルボキシレートから選んだ1種または2種以上の塩基性油剤を含有し、海水中における28日後の生分解性(BOD)が20%以上である。
・前記タンクが、このタンクに収容された潤滑剤を攪拌する攪拌機構を有する。
図1は、本発明に係る鋼管のねじ部への潤滑剤塗布装置の構成を模式的に示す説明図である。潤滑剤が管端部に塗布される鋼管P(例えば、油井管またはライザ管用の鋼管)は、管端部8の外面に雄ねじ部8aと内面に雌ねじ部8bを有する。雄ねじ部8aは管ねじ継手のピンを構成する。一方、雌ねじ部8bは管ねじ継手のボックスを構成する。以下では、雄ねじ部8aをピン、雌ねじ部8bをボックスという。
鋼管支持装置2は、管端部に刻設されたねじ部であるピン8aまたはボックス8bを有する鋼管Pを、その中心軸回りに図1における矢印方向へ回転させながら、支持するためのものである。
潤滑剤循環系3は、噴霧に適した粘度に調整された潤滑剤9を循環させておくことにより潤滑剤9の流れを安定させ、これにより後述する潤滑剤噴霧装置5からスプレーされる潤滑剤9の吐出量の定量性を高めるものである。
定量供給装置4は、潤滑剤循環系3内を循環している、粘度調整された潤滑剤9を定量供給するための装置であり、定量ポンプから構成される。図示の態様では、定量ポンプとしてロータリー式プランジャーポンプを用いているが、噴霧可能な粘稠液体の定量供給が可能であれば他の方式の定量ポンプを利用可能である。
本発明における潤滑剤噴霧装置5は、特許文献1、2により開示される潤滑剤塗布装置のように潤滑剤9をブラシで延ばしてピン8aまたはボックス8bへ塗布するのではなく、霧化された潤滑剤9を鋼管Pのピン8aまたはボックス8bへスプレーするための装置であり、上述したように、ピン8aへ潤滑剤9を塗布するための第1の潤滑剤噴霧装置5aと、ボックス8bへ潤滑剤9を塗布するための第2の潤滑剤噴霧装置5bとを有する。
同様に、第2の潤滑剤噴霧装置5bは、第2の定量ポンプ4bから定量供給される潤滑剤9を送るための潤滑剤供給路21aと、潤滑剤供給路21aから独立して噴霧用のエアーを送るためのエアー供給路22aと、噴霧用のエアーにより霧化された潤滑剤9を先端のノズル23aから鋼管Pのボックス8bへ向けてスプレーするスプレーガン23とを有する。潤滑剤供給路21aとエアー供給路22aと先端ノズル23aの近傍に位置する合流部(図示しない)で合流して潤滑剤が霧化され、霧化された潤滑剤がノズルからスプレーされる。
スプレーガン支持装置6は、スプレーガン19、20、23を、鋼管Pの軸方向および/または半径方向へ移動自在に支持する機能を有する装置である。図1に示す例では、本装置はさらに、スプレーガン23をボックス8bに対して傾斜自在に支持する機能をも有する。なお、図1には示していないが、スプレーガン支持装置6は、さらに、スプレーガン19、20をもピン8aに対しても傾斜自在に支持する機能を有していてもよい。
図2に示すように、ピン8aに形成されている雄ねじは、鋼管Pの外面(雄ねじのねじ底面を形成)8cに平行なねじ山面8dと、鋼管外面8cに垂直な面に対して10°傾斜している側面(挿入面)8eと、鋼管外面8cに垂直な面に対して-3°傾斜している側面(荷重面)8fとを有する。これらの挿入面8eおよび荷重面8fの傾斜角度は例示であり、変動しうる。荷重面の傾斜角度は0°またはプラスの値をとることもある。以下では、傾斜角度が正である側面8eをP側面、傾斜角度が負である側面8fをN側面と称する。
制御装置7は、必ずしも設ける必要はないが、潤滑剤9の噴霧状態を安定させるためには設けることが望ましい。
なお、鋼管Pの軸方向位置が同じで、周方向にのみ異なる複数のノズルが存在する場合は、それらノズルを1セットと考え、mの値は1とする。
本発明に係る潤滑剤塗布装置1は、ターニングローラー2a、2bにより矢印方向に回転する鋼管Pのピン8aに対して鋼管Pの軸方向へ移動するスプレーガン19、20のノズル19a、20aから、または、ボックス8bに対してスプレーガン23のノズル23aから、噴霧可能な粘度に調整された潤滑剤9を円錐状に噴霧することによって、鋼管Pのピン8またはボックス8bに螺旋状に潤滑剤9を塗布するものである。このため、軸方向へのスプレーガン19、20または23の移動速度Vが上述した値(m×n×L)を上回ってしまうと、螺旋状の塗膜の間に鋼管Pの軸方向への非塗装部分が断続的に形成される。逆に、軸方向へのスプレーガン19、20または23の移動速度Vが遅過ぎると、生産性が低下するとともに潤滑剤9の塗膜厚が大きくなり過ぎ、ピン8aまたはボックス8bに塗布された潤滑剤9が流れるおそれがある。
本発明に係る潤滑剤塗布装置1は、任意の膜厚の潤滑剤9の被膜を形成することも可能であり、上述した(2)式の関係が満足されるようにすればよい。
はじめに、ターニングローラー2a、2bの上に、管端部に刻設されたねじ部であるピン8aを有する鋼管Pを搭載してセットし、ターニングローラー2a、2bを図1における矢印方向へ駆動回転させることにより、鋼管Pを図1における矢印方向へ回転させる。
この後、電磁弁14を切り替えることにより、ピン8aに潤滑剤9を塗布することを選択するとともに、ピン8aへ潤滑剤9を塗布するための第1の潤滑剤噴霧装置5aへ定量供給するための第1の定量ポンプ4aを起動する。これにより、第1の定量ポンプ4aへ潤滑剤9が供給される。
以上説明したように、本発明に係る鋼管Pのねじ部8a、8bへの潤滑剤塗布装置1および塗布方法によれば、鋼管Pのピン8aにおける潤滑剤9の膜厚を、はみ出しがないだけではなく良好な潤滑を得られる膜厚に制御することができるようになる。
(i)高粘性液状の潤滑剤を揮発性溶解基材による希釈または加熱によって噴霧可能な粘度に事前に調整すること、
(ii)噴霧可能な粘度に事前に調整された潤滑剤9を潤滑剤循環系3で循環させておくこと、
(iii)タンク10に収容された潤滑剤9を攪拌機構10aにより攪拌しておくこと、
(iv)サーボモーター4cにより吐出量を制御される第1の定量ポンプ4aを用いて、スプレーガン19、20へ潤滑剤9を供給すること、
(v)サーボモーター24b、24dを駆動源とする第1のスプレーガン支持装置24を用いて、スプレーガン19、20の移動速度を高精度で制御すること、
(vi)スプレーガン19、20の噴射角度を最適に設定すること、および
(vii)制御装置7を用いて、スプレーガン支持装置6による軸方向へのスプレーガン19、20の移動速度V(mm/min)が(1)式:V≦m×n×Lの関係を充足するように、鋼管支持装置2による鋼管Pの回転速度、およびスプレーガン支持装置6によるスプレーガン19、20の移動速度を、15mm/min以上25mm以下/minの範囲に高精度に制御すること
によって、鋼管Pのピン8aのねじ山の各面における潤滑剤9の膜厚を、はみ出しがないだけではなく、良好な潤滑を得られる6μm以上、8μm以下に制御することができるようになる。
結果を表1にまとめて示す。なお、表1における符号WTはパイプの肉厚を示し、符号T/Rはターニングローラーを示し、定量ポンプとは第1の定量ポンプ4a(回転数可変の回転式プランジャーポンプ)を示す。ポンプ定数はポンプ1回転あたりの吐出量を意味し、ポンプ定数およびポンプ回転数も第1の定量ポンプ4aの値である。
このようにして、本発明によれば、管ねじ継手のピンまたはボックス、特に典型的には長い鋼管の端部に形成され、塗布作業がより困難なピンの表面に対して、高粘性液状の潤滑剤を、所定の付着量で薄く均一に塗布すること、具体的には、従来に比べて1/10程度といった薄い厚みでかつ均一に高粘性液状の潤滑剤を塗布することができるようになる。
Claims (9)
- 管ねじ継手のピンまたはボックスを構成する鋼管端部の外面または内面に設けられたねじ部に潤滑剤を塗布する装置であって、
前記鋼管をその中心軸回りに回転させながら支持する鋼管支持装置と、
噴霧可能な粘度に調整された潤滑剤を貯留するタンク、この潤滑剤が循環して流れる配管、およびこの配管内で潤滑剤を循環させるポンプを有する潤滑剤循環系と、
前記潤滑剤循環系を循環する潤滑剤を定量供給するための定量ポンプからなる定量供給装置と、
定量供給装置から定量供給される潤滑剤を送るための潤滑剤供給路、この潤滑剤供給路から独立して噴霧用のエアーを送るためのエアー供給路、およびエアーにより霧化された潤滑剤を、先端のノズルから前記鋼管のねじ部へ噴霧する少なくとも1つのスプレーガンを有し、潤滑剤供給路とエアー供給路の合流部を前記ノズルの近傍に有する潤滑剤噴霧装置と、
前記スプレーガンを鋼管の軸方向および/または半径方向へ移動自在に支持するスプレーガン支持装置と、
を備えることを特徴とする装置。 - 前記定量ポンプがロータリー式プランジャーポンプである、請求項1記載の潤滑剤塗布装置。
- 前記スプレーガン支持装置が、スプレーガンを鋼管のねじ部に対して傾斜自在に支持する、請求項1または2記載の潤滑剤塗布装置。
- 前記潤滑剤が、塩基性スルホネート、塩基性サリシレート、塩基性フェネートおよび塩基性カルボキシレートから選んだ1種または2種以上の塩基性油剤を含有し、海水中における28日後の生分解性(BOD)が20%以上である、請求項1または2記載の潤滑剤塗布装置。
- 前記潤滑剤の粘度調整が、潤滑剤の揮発性溶解基材による希釈または潤滑剤の加熱により行われる、請求項1または2記載の潤滑剤塗布装置。
- 前記タンクが、このタンクに収容された潤滑剤を攪拌する攪拌機構を有する、請求項1または2記載の潤滑剤塗布装置。
- 前記スプレーガンから噴射された潤滑剤の鋼管表面における噴射パターンの長径をL(mm)とし、鋼管の回転速度をn(rpm)とし、鋼管の軸方向に関するノズルの数をm(個)とするとともに、前記スプレーガン支持装置による軸方向へのスプレーガンの移動速度をV(mm/min)とした場合に(1)式:V≦m×n×Lの関係が満たされるように、鋼管支持装置による鋼管の回転速度、およびスプレーガン支持装置によるスプレーガンの移動速度を制御する制御装置をさらに備える、請求項1または2記載の潤滑剤塗布装置。
- 管ねじ継手のピンまたはボックスを構成する鋼管端部の外面または内面に設けられたねじ部に潤滑剤を塗布する方法であって、スプレーガンに、噴霧可能な粘度に調整されて循環する潤滑剤を定量供給するとともに、この潤滑剤とは別に噴霧用のエアーを供給し、供給された潤滑剤および噴霧用のエアーをスプレーガンの先端のノズルの近傍で混合し、噴霧用のエアーとの混合により霧化された潤滑剤を、中心軸回りに回転しながら支持される鋼管の少なくとも軸方向および/または半径方向へ向けて移動するスプレーガンのノズルから、鋼管のねじ部へ向けて噴霧することを特徴とする方法。
- 前記スプレーガンから噴射された潤滑剤の鋼管表面における噴射パターンの長径をL(mm)とし、鋼管の回転速度をn(rpm)とし、鋼管の軸方向に関するノズルの数をm(個)とするとともに、前記スプレーガン支持装置による軸方向へのスプレーガンの移動速度をV(mm/min)とした場合に(1)式:V≦m×n×Lの関係が満たされるように鋼管の回転速度とスプレーガンの移動速度を制御する、請求項8記載の方法。
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EP10758719.8A EP2415528B1 (en) | 2009-03-30 | 2010-03-30 | Device and method for applying lubricant to screw thread section of steel pipe |
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BRPI1009567A BRPI1009567A2 (pt) | 2009-03-30 | 2010-03-30 | aparelho e método para aplicar um lubrificante a uma parte rosqueada de um tubo de aço |
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- 2010-03-30 CA CA2753360A patent/CA2753360C/en not_active Expired - Fee Related
- 2010-03-30 WO PCT/JP2010/055706 patent/WO2010113948A1/ja active Application Filing
- 2010-03-30 BR BRPI1009567A patent/BRPI1009567A2/pt not_active Application Discontinuation
- 2010-03-30 CN CN201080014857.9A patent/CN102378652B/zh not_active Expired - Fee Related
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US11000865B2 (en) | 2017-10-25 | 2021-05-11 | Sio Co., Ltd. | Fluid supply apparatus |
JP2021164908A (ja) * | 2020-04-07 | 2021-10-14 | 株式会社クボタ | 塗装装置および管の製造方法 |
CN112676071A (zh) * | 2020-12-10 | 2021-04-20 | 天津市锦诺钢管有限公司 | 一种钢管自动喷漆装置 |
CN112676071B (zh) * | 2020-12-10 | 2022-05-17 | 天津市锦诺钢管有限公司 | 一种钢管自动喷漆装置 |
Also Published As
Publication number | Publication date |
---|---|
CA2753360A1 (en) | 2010-10-07 |
BRPI1009567A2 (pt) | 2019-07-30 |
CN102378652B (zh) | 2014-12-10 |
AR076167A1 (es) | 2011-05-26 |
JPWO2010113948A1 (ja) | 2012-10-11 |
EP2415528B1 (en) | 2016-04-27 |
EP2415528A4 (en) | 2014-11-26 |
JP5513489B2 (ja) | 2014-06-04 |
MX2011010387A (es) | 2011-12-14 |
EP2415528A1 (en) | 2012-02-08 |
CN102378652A (zh) | 2012-03-14 |
CA2753360C (en) | 2014-12-09 |
US20120034376A1 (en) | 2012-02-09 |
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