CN219664633U - Portable petroleum pipe screw thread cleaning and screw thread oil coating system - Google Patents

Abstract

The utility model discloses a portable petroleum pipe screw thread cleaning and screw thread oil coating system, which is provided with an air source and a cleaning oil coating head, wherein the cleaning oil coating head comprises an internal thread cleaning oil coating head provided with an internal thread brush and an external thread cleaning oil coating head provided with an external thread brush, and the cleaning oil coating head is connected with an air drill through a cleaning oil injection rotating shaft; a rotary shaft oiling channel is arranged in the cleaning oiling rotary shaft, and the rotary shaft oiling channel can be communicated with an internal thread brush in the internal thread cleaning oiling head or communicated with an external thread brush in the external thread cleaning oiling head; the rotary shaft oiling channel in the clean oiling rotary shaft is sequentially connected with an oil gun, an oil supply pipeline and an oil outlet of an oiling machine through an oiling pipe, and an air source can be connected with an air drill and the oiling machine. The system realizes the rotation of the cleaning oil coating head and the oiling transfer control operation, can independently brush and clean, can synchronously control the oil spraying, and can be widely applied to the maintenance and the field construction operation of various petroleum pipe threads.

Description

Portable petroleum pipe screw thread cleaning and screw thread oil coating system

Technical Field

The utility model relates to a lubricating device for pipe rod threads in the technical field of petroleum drilling equipment, in particular to a portable petroleum pipe thread cleaning and thread oil coating system.

Background

The oil field enters the middle and final stages of exploitation, and because of deep oil reservoir burial, high sulfur content and compact rock, the engineering geological features are complex, the number of horizontal wells is increased, and the drilling engineering difficulty is high. In particular, the friction is large during horizontal drilling of a middle-large horizontal section in a horizontal well, the horizontal drilling meets hard rock layers, and a drill rod and a drilling tool are subjected to complex working conditions such as high torque. If the screw thread oil is uniformly coated on the screw thread part before the drill rod is connected, the service life of the drill rod can be obviously prolonged, and the drilling tool is protected from being damaged when the sudden torsion is increased; in middle-high load drilling operation, can also avoid screw thread bonding and wearing and tearing, under the abominable operating condition such as saline and alkaline corrosion, high temperature, high pressure, the protection drilling string screw thread is not eroded and worn and torn, avoids thread scratch, thread gluing, convenient to detach.

In order to solve the problem of uniformly coating screw oil on the screw thread part of a petroleum pipe, field technicians do a great deal of work, and remarkable results are achieved, and the following patent technologies related to the patent retrieval are adopted:

a drilling string screw cleaning and screw oil spraying device disclosed in patent application number CN 201920631893.8: the utility model relates to a drilling string screw thread cleaning and screw thread oil spraying device which comprises a main body structure, an air valve box, an electric box and a screw thread oil pump, wherein the main body structure is arranged on a hydraulic tongs; the main body structure comprises a mounting seat arranged on the hydraulic tongs, a left executive cover component and a right executive cover component which are pin-connected on the mounting seat, and an air cylinder with one end hinged with the mounting seat and the other end respectively connected with the left executive cover component and the right executive cover component; the left and right executing cover components symmetrically form an inner cavity for covering the screw end of the drill rod, and the cylinder drives the left and right executing cover components to open or close; and the left and right executing cover components are internally provided with an air spraying device and a screw thread oil spraying device. The utility model has the beneficial effects that the screw thread cleaning and the screw thread oil spraying are completed before the pipe column is buckled; the drill rod has good adaptability to drill rods with different specifications; the unmanned surface screw thread cleaning and screw thread oil spraying work is realized, the working efficiency is improved, and the personnel configuration is reduced.

However, the device has large size and mass and high manufacturing cost, so the device is only suitable for specific places and is only suitable for cleaning and spraying the male buckle of the drill rod due to the structural design, and the female buckle of the drill rod cannot be maintained.

An oil pipe sealing grease smearing tool disclosed in patent application number CN 201910355085.8: the tool mainly solves the problems of uneven smearing and poor tightness of the oil pipe caused by smearing the existing oil pipe screw thread sealing grease by adopting a manual brush. The left end of the outer cylinder is connected with a grease coating head, the outer part of the left end of the grease coating head is sleeved with a grease coating head outer sleeve, an annular gap is reserved between the middle part of the grease coating head outer sleeve and the grease coating head, a grease sealing channel is formed in the grease coating head, a piston is arranged in the outer cylinder, an inner sleeve is arranged in the piston, a spring is arranged between the piston and a rear cover, a screw is connected to the rear cover, and the left end of the screw is connected with the inner sleeve. The oil pipe sealing grease smearing tool is used for smearing oil pipe sealing grease, the sealing grease is smeared with good uniformity once, the problem that an oil pipe is not sealed is avoided, and reworking is avoided.

However, the tool has low automation degree and complex operation, and is only suitable for male buckles.

Screw oil applying device and screw oil applying system disclosed in patent application number CN 201821739438.1: the utility model relates to the technical field of petroleum wellhead operation tools, and discloses a screw thread oil smearing device which comprises a smearing assembly, wherein the smearing assembly comprises a smearing head and a smearing core, the smearing head is provided with a slot and a first oil flow passage which is intersected with the opening direction of the slot, the smearing core is inserted in the slot, the smearing core is provided with an oil passage and a second oil flow passage which is communicated with the oil passage, and the oil passage is used for being communicated with an oil supply system; the smearing core is used for being connected with the driving piece so as to move relative to the smearing head under the driving of the driving piece, so that the second oil flow channel is communicated with the first oil flow channel or misplaced. The screw thread oil smearing device provided by the utility model has high smearing efficiency, is smeared in an oil pushing and extruding mode, is not affected by low temperature, can be used for normally oiling even in a low-temperature environment, can be used for oiling a piece to be oiled, ensures the uniformity of oiling, and has strong adaptability and practicability.

However, the above utility model requires high sealing performance of the device and is applicable only to internal threads.

A screw oil spraying mechanism for drill pipe threads is disclosed in patent application number CN 201820155109.6: including spouting oil cavity, nozzle structure and oil supplementing structure, install the piston in the oil injection cavity, the piston will spout oil cavity and separate into left side chamber and right side chamber, right side intracavity is installed elastic component, elastic component one end with piston fixed connection, other end and oil injection cavity fixed connection, offer driving medium import and driving medium export on the oil injection cavity, driving medium import and driving medium export all with right side chamber intercommunication, nozzle structure horizontal installation in the left end of oil injection cavity, and with left side chamber intercommunication, oil supplementing structure install in the upper end of oil injection cavity, and can be left side chamber oil supplementing.

Said utility model uses spraying mechanism to replace manual painting, so that it is more convenient and quick to operate, and can make the screw thread oil on the male fastener be more uniform and comprehensive, reduce labor intensity of workers and raise working efficiency.

At present, the petroleum pipe screw thread oil smearing tool is forward automatically, light and finely developed, and is gradually suitable for special operation places, so that all-weather, full-time and all-terrain drilling tool maintenance work is carried out. Especially in the upper buckling assembly link of the pipe column, the screw thread cleaning and the screw thread oil smearing work are realized on the premise of not damaging the screw thread, and meanwhile, the operation requirements of high efficiency and low cost are met. For this purpose, the application tool for the petroleum pipe thread compound is still in need of improvement.

Disclosure of Invention

The utility model aims to provide a portable petroleum pipe screw thread cleaning and screw thread oil coating system, which can realize the cleaning of petroleum pipe screw threads and the coating of screw thread oil on the premise of not damaging screw threads in the upper buckle assembly link of a pipe column, thereby not only meeting the cleaning of petroleum pipe internal screw threads and the coating of screw thread oil, but also meeting the cleaning of petroleum pipe external screw threads and the coating of screw thread oil. The working efficiency is improved, and the production cost is reduced.

The technical scheme of the utility model is as follows:

a portable petroleum pipe screw thread cleaning and screw thread oil coating system is provided with an air source and a cleaning oil coating head, wherein:

the cleaning oiling head comprises an internal thread cleaning oiling head provided with an internal thread brush and an external thread cleaning oiling head provided with an external thread brush, and is connected with the air drill through a cleaning oiling rotating shaft;

a rotary shaft oiling channel is arranged in the cleaning oiling rotary shaft, and the rotary shaft oiling channel can be communicated with an internal thread brush in the internal thread cleaning oiling head or communicated with an external thread brush in the external thread cleaning oiling head;

the rotary shaft oiling channel in the clean oiling rotary shaft is sequentially connected with an oil gun, an oil supply pipeline and an oil outlet of an oiling machine through an oiling pipe, and an air source can be connected with an air drill and the oiling machine.

Preferably, the air inlet of the air drill is connected with an air source connector connected between an air source and the oiling machine through an air pipeline.

Preferably, the air source connector is a three-way connector.

Preferably, an internal thread brush in the internal thread cleaning oil coating head is fixed in the outer wall of the upper part of the internal thread brush fixing body, and an internal thread cleaning oil injection pore canal is arranged in the internal thread brush fixing body; the internal thread cleaning oiling pore canal is communicated with the bottom of the internal thread brush.

Preferably, the external diameter of the lower part of the internal thread brush fixing body is larger than the external diameter of the upper part, the internal thread cleaning oiling pore canal consists of a central pore canal and a branch pore canal, and the lower end of the central pore canal is provided with an internal thread and can be connected with a cleaning oiling rotating shaft and communicated with a rotating shaft oiling channel; one end of a branch duct of the internal thread cleaning oiling duct is communicated with the central duct, and the other end of the branch duct is communicated with the bottom of the internal thread brush.

Preferably, the external thread brush fixing body of the external thread cleaning oil coating head is a cylindrical body with a closed bottom, the external thread brush is fixed on the upper part of an inner cavity of the external thread brush fixing body, an external thread cleaning oil injection pore canal is arranged in the external thread brush fixing body, and the external thread cleaning oil injection pore canal is distributed around a fixing body connecting hole of the external thread brush fixing body, one end of the external thread cleaning oil injection pore canal is communicated with the fixing body connecting hole, and the other end of the external thread cleaning oil injection pore canal is communicated with the bottom of the external thread brush.

Preferably, the fixing body connecting hole is formed in the lower body of the external thread brush fixing body, the upper end of the fixing body is communicated with the external thread cleaning oiling hole channel, the lower end of the fixing body is communicated with the lower end of the body of the external thread brush fixing body, the fixing body is provided with an internal thread and can be connected with the cleaning oiling rotating shaft, and the external thread cleaning oiling hole channel can be communicated with the rotating shaft oiling channel.

Preferably, the clean oiling rotating shaft is provided with a rotating shaft body, an end cover, an outer cylinder and a bearing, a rotating shaft oiling channel is arranged in the rotating shaft body, an outer cylinder oiling hole is arranged in the outer cylinder, the bearing is fixed between the rotating shaft body and the outer cylinder at two sides of the radial oil passing hole of the rotating shaft oiling channel, and the end cover is arranged at the outer side of the bearing and in threaded connection with the outer cylinder; the outer cylinder oil filling hole can be connected with an oil filling pipe.

Preferably, the axial channel in the oiling channel of the rotating shaft is on an axis with the rotating shaft body, the upper end of the oiling channel is communicated with the upper end of the rotating shaft body, and the upper end of the rotating shaft body is provided with external threads and can be in threaded connection with the internal thread brush fixing body or in threaded connection with the external thread brush fixing body connecting hole of the external thread brush fixing body; and a sealing ring is arranged between the end cover and the rotating shaft body.

Preferably, the external diameter of the internal thread brush is equal to or larger than the internal diameter of the internal thread section of the petroleum pipe, and the internal diameter of the external thread brush is equal to or smaller than the external diameter of the external thread section of the petroleum pipe; the internal thread brush and the external thread brush can be made of metal materials or nonmetal materials; the air source is an air compressor, the pneumatic and oil supply lines 4 are soft lines, and the filler pipe is a hard line.

Compared with the prior art, the utility model has the remarkable use effects that:

1. the utility model can adopt the air compressor of the operation site as the air source and the driving power, thereby being safe and convenient, improving the automation degree of the system, reducing the labor intensity of operators and greatly improving the working efficiency of coating the screw oil on the petroleum pipe on site.

2. The system adopts air source driving, combines mechanical transmission design, realizes the rotation and oiling transfer control operation of the cleaning oiling head, can independently brush and clean, can synchronously control oil spraying, and completes the operation procedures of cleaning before spraying.

3. The clean oiling head in the system comprises an internal thread clean oiling head and an external thread clean oiling head, and can be widely applied to maintenance and field construction operation of various petroleum pipe threads.

4. The internal thread brush and the external thread brush in the system can be made of non-metal materials and metal materials, so that the structural strength is ensured, and meanwhile, the light weight treatment is realized, and the replacement is strong and the economic applicability is good.

5. The system has the advantages of strong portability, simple field operation procedure, purchasing of oil guns, pneumatic drills and oiling machines, easy manufacture, contribution to field popularization and application and achievement of high-efficiency and low-cost operation requirements.

6. The utility model greatly improves the working efficiency of coating screw thread oil on the petroleum pipe, effectively protects the screw thread of the petroleum pipe, prolongs the service life of the petroleum pipe and has obvious use effect.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic view of the structure of the cleaning oiling rotating shaft in fig. 1.

Fig. 3 is a schematic view of the internal thread cleaning and oiling head in the cleaning and oiling head in fig. 1.

Fig. 4 is a schematic view of the structure of the external thread cleaning and oiling head in the cleaning and oiling head in fig. 1.

In the figure: pneumatic line 1, pneumatic drill 2, oiling machine 3, oil supply line 4, oil gun 5, oil pipe 6, clean oiling rotation shaft 7, rotation shaft body 71, end cover 72, outer cylinder 73, outer cylinder oil filler 74, rotation shaft oiling channel 75, bearing 76, sealing ring 77, clean oiling head 8, internal thread clean oiling head 81, internal thread brush 811, internal thread clean oiling channel 812, internal thread brush fixing body 813, external thread clean oiling head 82, external thread brush 821, external thread clean oiling channel 822, external thread brush fixing body connecting hole 823, air source joint 9.

Detailed Description

The drawings are for reference and illustration purposes only and are not intended to limit the scope of the present utility model. The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, in the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1-4, a portable petroleum pipe screw cleaning and screw oil application system is provided with a gas source and cleaning oil application head 8, wherein:

the cleaning oil coating head 8 comprises an internal thread cleaning oil coating head 81 provided with an internal thread brush 811 and an external thread cleaning oil coating head 82 provided with an external thread brush 821, and the cleaning oil coating head 8 is connected with the air drill 2 through a cleaning oil injection rotating shaft 7;

a rotary shaft oiling passage 75 is provided in the cleaning oiling rotary shaft 7, and the rotary shaft oiling passage 75 can communicate with an internal thread brush 811 in the internal thread cleaning oiling head 81 or communicate with an external thread brush 821 in the external thread cleaning oiling head 82;

the rotary shaft oiling passage 75 in the cleaning oiling rotary shaft 7 is connected with the oil outlets of the oil gun 5, the oil supply pipeline 4 and the oiling machine 3 in sequence through the oiling pipe 6, and the air source can be connected with the air drill 2 and the oiling machine 3.

The cleaning and oiling head 8 in the present utility model comprises an internal thread cleaning and oiling head 81 provided with an internal thread brush 811 and an external thread cleaning and oiling head 82 provided with an external thread brush 821, and both the internal thread cleaning and oiling head 81 and the external thread cleaning and oiling head 82 can be connected with the air drill 2 through the cleaning and oiling rotating shaft 7. The defect that the existing screw thread oil coating device can only be used for coating external threads or can only be used for coating internal threads is overcome, and different coating effects and functions can be realized by replacing the cleaning oil coating heads 8 with different structures. In addition, the pneumatic drill 2 can be used for coating screw oil on a petroleum pipe and can also realize the function of cleaning threads. Particularly, in the upper buckling assembly link of the pipe column, the maintenance work of firstly air-flushing cleaning and then spraying the screw thread oil of the screw thread of the petroleum pipe is realized on the premise of not damaging the screw thread. The screw thread of the petroleum pipe is protected under severe working conditions such as saline-alkali corrosion, high temperature, high pressure and the like in the underground, so that the service life of the petroleum pipe is prolonged, and the screw thread is convenient to detach.

The utility model has high degree of automation, can fully utilize the air source of the construction operation site, is safe to use and convenient to operate, and meets the operation requirements of high efficiency and low cost.

On the basis of the first embodiment, the present utility model also has the following embodiments: one preferred embodiment is: the air inlet of the air drill 2 is connected with an air source joint 9 connected between an air source and the oiling machine 3 through an air pipeline 1.

One preferred embodiment is: the air source connector 9 is a three-way connector.

One preferred embodiment is: an internal thread brush 811 in the internal thread cleaning and oiling head 81 is fixed in the upper outer wall of the internal thread brush fixing body 813, and an internal thread cleaning and oiling hole 812 is arranged in the internal thread brush fixing body 813; the internal thread cleaning oiling hole 812 communicates with the bottom of the internal thread brush 811.

One preferred embodiment is: the lower outer diameter of the internal thread brush fixing body 813 is larger than the upper outer diameter, the internal thread cleaning oiling hole 812 consists of a central hole and a branch hole, and the lower end of the central hole is provided with an internal thread and can be connected with the cleaning oiling rotating shaft 7 and communicated with the rotating shaft oiling channel 75; one end of a branch duct of the internal thread cleaning oiling duct 812 is communicated with the central duct, and the other end is communicated with the bottom of the internal thread brush 811.

One preferred embodiment is: the external thread brush fixing body of the external thread cleaning and oiling head 82 is a cylindrical body with a closed bottom, the external thread brush 821 is fixed on the upper part of the inner cavity of the external thread brush fixing body, the external thread brush fixing body is internally provided with external thread cleaning and oiling pore canals 822, the external thread cleaning and oiling pore canals 822 are distributed around a fixing body connecting hole 823 of the external thread brush fixing body, one end of the external thread cleaning and oiling pore canals 822 are communicated with the fixing body connecting hole 823, and the other end of the external thread cleaning and oiling pore canals 822 are communicated with the bottom of the external thread brush 821.

One preferred embodiment is: the fixed body connecting hole 823 is formed in the lower body of the external thread brush fixed body, the upper end of the fixed body is communicated with the external thread cleaning oiling hole 822, the lower end of the fixed body is communicated with the lower end of the body of the external thread brush fixed body, the fixed body is provided with internal threads and can be connected with the cleaning oiling rotating shaft 7, and the external thread cleaning oiling hole 822 can be communicated with the rotating shaft oiling channel 75.

One preferred embodiment is: the cleaning oiling rotating shaft 7 is provided with a rotating shaft body 71, an end cover 72, an outer cylinder 73 and a bearing 76, a rotating shaft oiling channel 75 is arranged in the rotating shaft body 71, an outer cylinder oiling hole 74 is arranged in the outer cylinder 73, the bearing 76 is fixed between the rotating shaft body 71 and the outer cylinder 73 on two sides of the radial oiling hole of the rotating shaft oiling channel 75, and the end cover 72 is arranged on the outer side of the bearing 76 and in threaded connection with the outer cylinder 73; the outer cylinder oil filler hole 74 can be connected to the oil filler pipe 6.

One preferred embodiment is: an axial passage in the rotation shaft oiling passage 75 is in an axis line with the rotation shaft body 71, the upper end of the rotation shaft body 71 is communicated with the upper end of the rotation shaft body 71, and the upper end of the rotation shaft body 71 is provided with external threads and can be in threaded connection with the internal thread brush fixing body 813 or in threaded connection with the external thread brush fixing body connecting hole 823 of the external thread brush fixing body; a seal ring 77 is provided between the end cap 72 and the rotary shaft 71. The sealing between the end cover 72 and the rotating shaft body 71 can be ensured, the leakage of screw oil is avoided, the environment is protected, and the oil is saved.

One preferred embodiment is: the external diameter of the internal thread brush 811 is equal to or larger than the internal diameter of the internal thread section of the petroleum pipe, and the internal diameter of the external thread brush 821 is equal to or smaller than the external diameter of the external thread section of the petroleum pipe; the female screw brush 811 and the male screw brush 821 can be made of a metal material or a non-metal material; the air source is an air compressor, the pneumatic line 1 and the oil supply line 4 are soft lines, and the filler pipe 6 is a hard line. The inner screw brush 811 and the outer screw brush 821 may be made of steel wires or copper wires when made of a metal material, and may be made of a material such as plastic, nylon, or animal bristles when made of a non-metal material. The air source can be an air compressor of an operation construction site.

As shown in fig. 1, the cleaning oiling rotating shaft 7 is connected with the oil outlet of the oil gun 5, the oil supply pipeline 4 and the oiling machine 3 in sequence through the oiling pipe 6, and the pneumatic drill 2 is connected with an air source through the pneumatic pipeline 1 and the air source connector 9. The air source can be connected with the pneumatic part of the oiling machine 3 through the air source connector 9, and the oil outlet of the oil supply part of the oiling machine 3 is connected with the oil gun 5 through the oil supply pipeline 4. The oil gun 5 can realize the opening and closing operation of an oil way and the adjustment of the oil quantity, can control the oil to enter the cleaning oiling rotating shaft 7 through the oiling pipe 6, and finally pumps the oil to the internal thread cleaning oiling head 81 or the external thread cleaning oiling head 82.

The internal thread cleaning and oiling head 81 and the external thread cleaning and oiling head 82 are respectively provided with an internal thread cleaning and oiling pore canal 812 and an external thread cleaning and oiling pore canal 822, and a rotary shaft oiling channel 75 in the cleaning and oiling rotary shaft 7 can be communicated with the internal thread cleaning and oiling pore canal 812 in the internal thread cleaning and oiling head 81 or the external thread cleaning and oiling pore canal 822 in the external thread cleaning and oiling head 82, so that the operations of firstly pneumatically cleaning and then smearing screw thread oil on the internal thread or the external thread in a petroleum pipe are realized. The screw thread of the petroleum pipe is protected, and the service life of the petroleum pipe is prolonged.

The embodiments described above are only exemplary embodiments, but the present utility model is not limited to these embodiments, and modifications may be made by those skilled in the art without departing from the spirit and scope of the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and concept of the present utility model should be included in the scope of the present utility model. Therefore, the scope of protection is not limited to the description above.

Claims (10)

1. A portable petroleum pipe screw thread cleaning and screw thread oil coating system is provided with an air source and a cleaning oil coating head, and is characterized in that: the cleaning oiling head comprises an internal thread cleaning oiling head provided with an internal thread brush and an external thread cleaning oiling head provided with an external thread brush, and is connected with the air drill through a cleaning oiling rotating shaft; a rotary shaft oiling channel is arranged in the cleaning oiling rotary shaft, and the rotary shaft oiling channel can be communicated with an internal thread brush in the internal thread cleaning oiling head or communicated with an external thread brush in the external thread cleaning oiling head; the rotary shaft oiling channel in the clean oiling rotary shaft is sequentially connected with an oil gun, an oil supply pipeline and an oil outlet of an oiling machine through an oiling pipe, and an air source can be connected with an air drill and the oiling machine.

2. A portable petroleum pipe thread cleaning and thread oil application system as recited in claim 1, wherein said air inlet of said air drill is connected by pneumatic tubing to an air source connection between an air source and an oil injector.

3. A portable petroleum pipe thread cleaning and thread oil application system as recited in claim 2, wherein said air source connection is a three-way connection.

4. The portable petroleum pipe screw thread cleaning and screw thread oil coating system as recited in claim 1, wherein the internal thread brush in the internal thread cleaning oil coating head is fixed in the upper outer wall of the internal thread brush fixing body, and the internal thread brush fixing body is provided with an internal thread cleaning oil injection pore canal; the internal thread cleaning oiling pore canal is communicated with the bottom of the internal thread brush.

5. The portable petroleum pipe screw thread cleaning and screw thread oil coating system as recited in claim 4, wherein the lower outer diameter of the internal thread brush fixing body is larger than the upper outer diameter, the internal thread cleaning oiling pore canal consists of a central pore canal and a branch pore canal, and the lower end of the central pore canal is provided with an internal thread and can be connected with a cleaning oiling rotating shaft and communicated with a rotating shaft oiling channel; one end of a branch duct of the internal thread cleaning oiling duct is communicated with the central duct, and the other end of the branch duct is communicated with the bottom of the internal thread brush.

6. The portable petroleum pipe screw thread cleaning and screw thread oil coating system as claimed in claim 1, wherein the external thread brush fixing body of the external thread cleaning oil coating head is a cylindrical body with a closed bottom, the external thread brush is fixed at the upper part of an inner cavity of the external thread brush fixing body, the external thread brush fixing body is internally provided with external thread cleaning oil injection holes, and the external thread cleaning oil injection holes are distributed around a fixing body connecting hole of the external thread brush fixing body, one end of the external thread cleaning oil injection holes are communicated with the fixing body connecting hole, and the other end of the external thread cleaning oil injection holes are communicated with the bottom of the external thread brush.

7. The portable petroleum pipe thread cleaning and thread oil coating system as recited in claim 6, wherein the fixture connecting hole is provided in the lower body of the externally threaded brush fixture and has an upper end in communication with the externally threaded cleaning oiling passage, a lower end in communication with the lower body of the externally threaded brush fixture and having an internal thread and capable of being connected to the cleaning oiling rotating shaft, and the externally threaded cleaning oiling passage is capable of being in communication with the rotating shaft oiling passage.

8. The portable petroleum pipe screw thread cleaning and screw thread oil coating system as claimed in claim 1, 5 or 7, wherein the cleaning oiling rotating shaft is provided with a rotating shaft body, an end cover, an outer cylinder and a bearing, the rotating shaft body is provided with a rotating shaft oiling channel, the outer cylinder is provided with an outer cylinder oiling hole, the bearing is fixed between the rotating shaft body and the outer cylinder at two sides of the radial oiling hole of the rotating shaft oiling channel, and the end cover is arranged at the outer side of the bearing and is in threaded connection with the outer cylinder; the outer cylinder oil filling hole can be connected with an oil filling pipe.

9. The portable petroleum pipe screw thread cleaning and screw thread oil coating system according to claim 8, wherein an axial channel in the rotary shaft oiling channel is on the same axis with the rotary shaft body, the upper end of the rotary shaft body is communicated with the upper end of the rotary shaft body, and the upper end of the rotary shaft body is provided with external threads and can be in threaded connection with an internal thread brush fixing body or an external thread brush fixing body connecting hole of the external thread brush fixing body; and a sealing ring is arranged between the end cover and the rotating shaft body.

10. The portable petroleum pipe thread cleaning and thread oil application system of claim 2, wherein said internal thread brush has an outer diameter equal to or greater than an inner diameter of an internal thread section of the petroleum pipe and said external thread brush has an inner diameter equal to or less than an outer diameter of an external thread section of the petroleum pipe; the internal thread brush and the external thread brush can be made of metal materials or nonmetal materials; the air source is an air compressor, the pneumatic and oil supply lines (4) are soft lines, and the filler pipe is a hard line.