Oiling maintenance device for external thread of oil well drill rod

Abstract

The invention relates to the technical field of petroleum drilling, and discloses an oil coating maintenance device for an external thread of an oil well drill rod, which comprises an oil coating device head and oil supply equipment, the oiling device head part comprises a spray head seat transverse plate, two spray head seat vertical plates are connected below the spray head seat transverse plate, and the rear side shaft section of a fixed shaft is assembled below the two spray head seat vertical plates and is limited to do circumferential movement; the front side of the second gear is connected with an end cover, the front side of the end cover is connected with a rotating disc, the position, close to the edge, of the front side of the rotating disc is fixedly connected with a spray head, and a plurality of spray head oil outlet holes are formed in the side, facing a drill rod, of the spray head. Meanwhile, the side wall is connected with a plurality of bristles which do not interfere with the oil outlet holes of the spray head. According to the device, it is guaranteed that the external threads of the oil well drill rod are accurately and evenly coated with oil, the operation efficiency is improved, and the labor cost and the labor intensity are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil drilling, more particularly, to an oiling and maintenance device for the external thread of an oil well drill rod. BACKGROUND

[0002] In the field of oil exploitation, the oil well drill rod is a key component connecting the drilling machine and the downhole drilling and grinding equipment, and the maintenance and care of its external thread is crucial. During the use of the drill rod, the external thread not only has to bear huge axial tension, torque and complex alternating stress, but also has to face the harsh chemical corrosion and wear environment in the well. In order to ensure the good performance and service life of the external thread of the drill rod, a suitable thread oil needs to be evenly applied on the external thread when the drill rod is connected. The thread oil has multiple key roles: first, it can form a protective film on the thread surface, effectively isolating the corrosive medium in the well, preventing the thread from rusting and corroding, and thus ensuring the structural strength of the drill rod; second, it can significantly reduce the friction coefficient when the thread is connected, making the thread rotation smoother, reducing torque fluctuation, and avoiding thread damage or galling due to excessive torque; third, it helps to enhance the sealing of the thread connection, preventing the leakage of downhole fluid and ensuring the smooth progress of drilling operations.

[0003] Currently, in the process of applying oil to the external thread of the oil well drill rod, manual application is commonly used. However, manual application has many drawbacks: on the one hand, manual application is inefficient and cannot meet the large-scale and high-efficiency oiling requirements of the external thread of the drill rod, which seriously hinders the progress of drilling operations; on the other hand, the uniformity of manual application cannot be guaranteed, and uneven application or omission may occur.

[0004] In addition, existing oiling equipment (such as the technical solutions disclosed in patents CN220215331U, CN115538981A, CN217093995U, etc.) also has problems such as overly complex equipment or uneven oiling, which increases the processing cost and adversely affects the application of oil to the external thread of the drill rod.

[0005] Therefore, it is urgent to develop an efficient, precise and automated oiling device for the external thread of the oil well drill rod. SUMMARY

[0006] Therefore, the present application provides an oiling and maintenance device for the external thread of an oil well drill rod, which has the advantages of high efficiency, precision and automation.

[0007] The oiling and maintenance device for the external thread of an oil well drill rod comprises:

[0008] The oiling device head comprises a nozzle seat horizontal plate, two parallel nozzle seat vertical plates connected below the nozzle seat horizontal plate, a rear shaft segment of a fixed shaft assembled below the two nozzle seat vertical plates opposite to each other and limited to do circumferential movement, a fixed shaft oil injection channel opened in the fixed shaft, a hydraulic motor installed below the front side of the nozzle seat horizontal plate, a gear one connected on the hydraulic motor, a gear two rotatably connected on the outside of the front shaft segment of the fixed shaft and engaged with the gear one, a front side connecting end cover of the gear two, a front side connecting rotating disc of the end cover, the fixed shaft sequentially penetrating the end cover and the rotating disc from front to back and rotatably connected between the fixed shaft and the rotating disc, an annular closed cavity formed by the concave inside of the shaft diameter of the fixed shaft and the rotating disc, a fixed shaft oil outlet hole opened on the concave inside of the shaft diameter and connecting the fixed shaft oil injection channel and the annular closed cavity, a rotating disc oil outlet channel opened in the rotating disc and connecting the annular closed cavity, a nozzle fixed on the front side near the edge of the rotating disc, a nozzle oil path channel in the nozzle and communicated with the rotating disc oil outlet channel, and a plurality of nozzle oil outlet holes opened on the side of the nozzle facing the drill pipe and communicated with the nozzle oil path channel, and a plurality of bristles connected on the side wall and not interfering with the nozzle oil outlet holes.

[0009] The oiling device head comprises a nozzle seat horizontal plate, two parallel nozzle seat vertical plates connected below the nozzle seat horizontal plate, a rear shaft segment of a fixed shaft assembled below the two nozzle seat vertical plates opposite to each other and limited to do circumferential movement, a fixed shaft oil injection channel opened in the fixed shaft, a hydraulic motor installed below the front side of the nozzle seat horizontal plate, a gear one connected on the hydraulic motor, a gear two rotatably connected on the outside of the front shaft segment of the fixed shaft and engaged with the gear one, a front side connecting end cover of the gear two, a front side connecting rotating disc of the end cover, the fixed shaft sequentially penetrating the end cover and the rotating disc from front to back and rotatably connected between the fixed shaft and the rotating disc, an annular closed cavity formed by the concave inside of the shaft diameter of the fixed shaft and the rotating disc, a fixed shaft oil outlet hole opened on the concave inside of the shaft diameter and connecting the fixed shaft oil injection channel and the annular closed cavity, a rotating disc oil outlet channel opened in the rotating disc and connecting the annular closed cavity, a nozzle fixed on the front side near the edge of the rotating disc, a nozzle oil path channel in the nozzle and communicated with the rotating disc oil outlet channel, and a plurality of nozzle oil outlet holes opened on the side of the nozzle facing the drill pipe and communicated with the nozzle oil path channel, and a plurality of bristles connected on the side wall and not interfering with the nozzle oil outlet holes.

[0010] Preferably, the oiling device comprises a bottom plate, an oil tank assembly, a mechanical arm vertical arm and a hydraulic station installed above the bottom plate, an oil tank outlet hole opened on the side wall of the oil tank in the oil tank assembly and connected with the oil injection channel inlet through a pipeline, a push oil piston matched and movable up and down in the oil tank, a hydraulic cylinder rod connected above the push oil piston and downward extending from a hydraulic cylinder body, the hydraulic cylinder body connected on the mechanical arm vertical arm on one side through a hydraulic cylinder fixing plate, and the hydraulic station providing power source for the hydraulic cylinder body.

[0011] Preferably, a square hole is opened above the mechanical arm vertical arm, an end of a horizontal arm penetrates from the square hole, a hooking structure is installed on the bottom surface of the end of the horizontal arm away from the mechanical arm vertical arm, one end of a rope hook is connected with the hooking structure and the other end can be connected with the nozzle seat horizontal plate.

[0012] Preferably, the oil tank assembly and the hydraulic station are separately arranged on both sides of the mechanical arm vertical arm, the oil tank assembly comprises an oil tank seat installed on the bottom plate, an oil tank bottom cover adapted and placed in the upper side tank seat opening of the oil tank seat, and the oil tank connected above the oil tank bottom cover.

[0013] Preferably, the lower side of each of the nozzle seat vertical plates is connected with a baffle plate, the lower side of the nozzle seat vertical plate is provided with a square groove I, the upper side of the baffle plate is provided with a square groove II which cooperates with the corresponding square groove I to form a square hole, the rear side shaft section of the fixed shaft is assembled in the two square holes opposite to each other, and the cooperation part of the fixed shaft and the square hole is made into a square surface to limit the circumferential movement of the fixed shaft.

[0014] Preferably, the fixed shaft and the gear II are rotationally connected through a tapered roller bearing I, the fixed shaft and the rear side of the rotating disc are rotationally connected through a tapered roller bearing II, the end cover and the rotating disc are assembled with an end cover sealing ring, the rotating disc and the fixed shaft are assembled with a rotating disc sealing ring, and the annular sealed cavity is located between the end cover sealing ring and the rotating disc sealing ring.

[0015] Preferably, the front end of the rotating disc is connected with a small shaft section, the outer periphery of the small shaft section is sleeved with a thrust bearing, and the front end of the small shaft section is connected with a guide cone; the small shaft section and the fixed shaft are connected through a deep groove ball bearing, and the deep groove ball bearing is fixed by a round nut assembled at the most front end of the fixed shaft.

[0016] Preferably, the left and right sides of two nozzle seat vertical plates are connected by a connecting plate, and each connecting plate is connected with a handle on the outer side wall.

[0017] Preferably, two nozzles are fixedly connected to the front side of the rotating disc near the edge, and the two nozzles are oppositely arranged with the fixed shaft as the center.

[0018] Preferably, the outermost layer of the rotating disc is connected with a protective cover which can cover the whole nozzle, and the drill rod extends into the protective cover to perform the oiling maintenance operation of the external thread.

[0019] Compared with the prior art, the oiling maintenance device for the external thread of the oil well drill rod has the following beneficial effects:

[0020] (1) The oiling maintenance device for the external thread of the oil well drill rod provided by the application is efficient, precise, automatic, and can apply oil more uniformly, which can not only improve the oiling quality and work efficiency, reduce the labor intensity, but also effectively reduce the oiling defects caused by human factors, ensure the structural strength of the drill rod, and further ensure the safe and reliable operation of the oil well drill rod, improve the torque transmission stability during the connection of the drill rod, and has important significance for promoting the efficient and sustainable development of the oil exploitation industry.

[0021] (2), the invention can drive the nozzle to rotate uniformly around the outer wall of the drill pipe through the transmission system of the hydraulic motor, the nozzle is densely arranged with small but very dense oil outlet holes, so that the oil can uniformly flow out from the oil outlet holes of the nozzle to the surface of the drill pipe, the nozzle drives the bristles to rotate, and the bristles rotating around the outer part of the drill pipe can further uniformly brush the oil on the outer thread of the rotating rod.

[0022] (3), the invention uses a guide cone for positioning, approaches the inner diameter of the drill pipe, and the device can automatically complete centering, when reaching a sufficient depth, the device will stop at a position of sufficient depth under the action of the thrust bearing, without manual depth judgment, the device will not be stuck in the pipeline, and will not cause insufficient oil brushing due to insufficient length of extension or waste of oil due to too much extension length.

[0023] (4), the invention realizes the discharge of oil by reciprocating motion of the oil pushing piston. At the same time, the hydraulic motor is started, the nozzle starts to rotate, and the automatic oil brushing starts, so that the working efficiency is greatly improved.

[0024] (5), when the work is completed, the workers can directly rest by connecting the oiling device head and the cross arm of the oil supply equipment with a rope hook, which saves time and effort. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0026] Figure 1 It is a schematic diagram of the overall structure of the oiling device for the external thread of the oil well drill pipe.

[0027] Figure 2 It is a schematic diagram of the structure of the oiling device head Figure I .

[0028] Figure 3 It is a schematic diagram of the structure of the oiling device head Figure II .

[0029] Figure 4 It is a top view of the oiling device head.

[0030] Figure 5 It is Figure 4 A-A direction sectional view.

[0031] Figure 6 It is a side view of the oiling device head.

[0032] Figure 7 Structure diagram of fixed shaft in the application.

[0033] Figure 8 Structure diagram of rotating disc in the application.

[0034] Figure 9 Front view of rotating disc in the application.

[0035] Figure 10 Figure 9 Sectional view of B-B direction.

[0036] Figure 11 Structure diagram of nozzle in the application.

[0037] Figure 12 Structure diagram of oil supply device in the application.

[0038] Figure 13 Structure diagram of drill pipe.

[0039] In the figure: 1 - oiling device head, 2 - oil supply device, 3 - pipeline, 4 - rope hook, 5 - drill pipe, 101 - nozzle seat horizontal plate, 102 - nozzle seat vertical plate, 103 - fixed shaft, 104 - fixed shaft oil injection channel, 105 - hydraulic motor, 106 - gear one, 107 - gear two, 108 - end cover, 109 - rotating disc, 110 - shaft diameter inner recess segment, 111 - fixed shaft oil outlet hole, 112 - rotating disc oil outlet channel, 113 - nozzle, 114 - nozzle oil passage channel, 115 - nozzle oil outlet hole, 116 - brush hair, 117 - baffle, 118 - square face, 119 - conical roller bearing one, 120 - conical roller bearing two, 121 - end cover sealing ring, 122 - rotating disc sealing ring, 123 - small shaft diameter segment, 124 - thrust bearing, 125 - guide cone, 126 - deep groove ball bearing, 127 - round nut, 128 - connecting plate, 129 - handle, 130 - shroud, 201 - bottom plate, 202 - mechanical arm vertical arm, 203 - hydraulic station, 204 - oil containing bucket, 205 - oil pushing piston, 206 - hydraulic cylinder body, 207 - hydraulic cylinder rod, 208 - hydraulic cylinder fixing plate, 209 - horizontal arm, 210 - hooking structure, 211 - oil containing bucket seat, 212 - oil containing bucket bottom cover. DETAILED DESCRIPTION

[0040] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0041] ​In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] Example:

[0044] like Figure 1 As shown, this embodiment provides an oiling and maintenance device for the external threads of oil well drill pipes, which mainly includes an oiling device head 1 and an oil supply device 2.

[0045] In this embodiment, the end of the drill pipe that extends into the head of the oiling device is defined as the front end. Wherein, as... Figures 2-6 As shown, the oiling device head 1 includes a nozzle seat horizontal plate 101. Two parallel nozzle seat vertical plates 102 are connected below the nozzle seat horizontal plate 101. The rear shaft section of a fixed shaft 103 is assembled below the two front and rear opposite nozzle seat vertical plates 102 and is restricted to circumferential movement.

[0046] In this embodiment, a baffle 117 is connected to the lower part of each nozzle holder vertical plate 102. A square groove 1 is provided on the lower part of the nozzle holder vertical plate 102, and a square groove 2 is provided on the upper part of the baffle 117 to cooperate with the corresponding square groove 1 to form a square hole. The rear shaft section of the fixing shaft 103 is assembled into two square holes that are opposite each other, and the mating part of the fixing shaft 103 and the square hole is made into a square surface 118 (see reference). Figure 7 This restricts the circumferential movement of the fixed shaft 103.

[0047] The fixed shaft 103 has an oil injection channel 104, and the oil inlet of the oil injection channel on the front side of the fixed shaft oil injection channel 104 is connected to the oil supply device 2.

[0048] The front lower side of the nozzle seat horizontal plate 101 is provided with a space for installing a hydraulic motor 105, the hydraulic motor 105 is connected with a gear one 106, the front side of the outer part of the shaft section of the fixed shaft 103 is rotatably connected with a gear two 107 which is engaged with the gear one 106; the front side of the gear two 107 is connected with an end cover 108, the front side of the end cover 108 is connected with a rotating disc 109, the fixed shaft 103 passes through the end cover 108 and the rotating disc 109 in sequence and is rotatably connected with the rotating disc 109.

[0049] The hydraulic motor 105 drives the gear two 107 to rotate through the gear one 106, and then drives the end cover 108 and the rotating disc 109 to rotate around the fixed shaft 103.

[0050] In the embodiment, the fixed shaft 103 and the gear two 107 are rotatably connected through a tapered roller bearing one 119, and the fixed shaft 103 and the rear side of the rotating disc are rotatably connected through a tapered roller bearing two 120.

[0051] The friction between the gear two 107 and the fixed shaft 103 when rotating is reduced due to the existence of the tapered roller bearing one 119, thereby reducing the wear of the gear two 107; the friction between the rotating disc 109 and the fixed shaft 103 when rotating is reduced due to the existence of the tapered roller bearing two 120, thereby reducing the wear of the rotating disc 109.

[0052] The shaft section of the fixed shaft 103 which cooperates with the rotating disc 109 is internally concave to form an annular closed cavity, and the fixed shaft oil outlet hole 111 which communicates the fixed shaft oil injection channel 104 and the annular closed cavity is arranged on the internally concave section 110 of the shaft diameter, and the rotating disc oil outlet channel 112 which communicates the annular closed cavity is arranged in the rotating disc 109 (see Figures 7-10 ).

[0053] In the embodiment, the end cover sealing ring 121 is assembled between the end cover 108 and the rotating disc 109, the rotating disc sealing ring 122 is assembled between the rotating disc 109 and the fixed shaft 103, the annular closed cavity is located between the end cover sealing ring 121 and the rotating disc sealing ring 122, and the oil in the annular closed cavity can be prevented from leaking out through the cooperation of the end cover sealing ring 121 and the rotating disc sealing ring 122.

[0054] The nozzle 113 is fixedly connected to the front side near the edge of the rotating disc 109, the gear two 107 drives the end cover 108, the rotating disc 109 and the nozzle 113 to rotate, the nozzle oil passage 114 in the nozzle 113 is communicated with the rotating disc oil outlet channel 112; a plurality of nozzle oil outlet holes 115 which communicate with the nozzle oil passage 114 are arranged on the side of the nozzle which faces the drill pipe (see Figure 11 ), and a plurality of bristles 116 which do not interfere with the nozzle oil outlet holes 115 are connected to the side wall.

[0055] The spray head 113 is provided with a plurality of small and dense spray head oil outlets 115, and oil flows out of the spray head oil outlets 115 to the surface of the drill pipe. When the rotating disc 109 rotates the spray head 113, the bristles 116 evenly brush the oil on the external thread of the drill pipe 5.

[0056] In this embodiment, as shown in Figure 5 , Figure 8 The front end of the rotating disc 109 is connected to a small shaft diameter section 123, the outer periphery of the small shaft diameter section 123 is sleeved with a thrust bearing 124, when the device reaches a certain depth, the thrust bearing 124 can avoid the device from continuing to advance inwardly; the front end of the small shaft diameter section 123 is connected to a guide cone 125; the small shaft diameter section 123 and the fixed shaft 103 are connected through a deep groove ball bearing 126, and the deep groove ball bearing 126 is fixed by a round nut 127 assembled at the front end of the fixed shaft 103.

[0057] The inner ring of the deep groove ball bearing 126 cooperates with the fixed shaft 103, and the outer ring cooperates with the center inner wall of the small shaft diameter section 123. When the rotating disc 109 rotates relative to the fixed shaft 103, the inner and outer rings of the deep groove ball bearing are very smooth, so the friction between the fixed shaft 103 and the bearing and the small shaft diameter section 123 and the bearing is small. In other words, the deep groove ball bearing 126 reduces the friction between the rotating disc 109 and the fixed shaft 103, thereby reducing the wear of the rotating disc 109.

[0058] In further specific embodiments, the left and right sides of the two spray head seat vertical plates 102 are connected together by a connecting plate 128, which can fix the structure to some extent to prevent deformation; and each connecting plate 128 is correspondingly connected to a handle 129 on the outer side wall, which is convenient for workers to carry when in use.

[0059] In further specific embodiments, two spray heads 113 are fixedly connected to the front side of the rotating disc 109 near the edge, and the two spray heads 113 are oppositely arranged with the fixed shaft as the center.

[0060] In further specific embodiments, the outermost layer of the rotating disc 109 is connected to a protective cover 130 which can cover the spray head 113 as a whole; the drill pipe 5 extends into the protective cover 130 to perform the oiling maintenance operation of the external thread. The protective cover 130 can protect the internal structure and play a rough centering role when brushing oil.

[0061] In this embodiment, as shown in Figure 12 The oil supply device 2 is connected to the oil injection passage inlet on the rear side of the fixed shaft, the oil supply device 2 is used to supply oil to the oiling device head 1, and the oiling device head 1 is temporarily connected when not in use.

[0062] In further specific embodiments, the oil supply device 2 comprises a base plate 201 which is generally placed directly on the ground, above which an oil tank assembly, a mechanical arm vertical arm 202 and a hydraulic station 203 are installed, an oil tank outlet hole is formed in the side wall of the oil tank 204 in the oil tank assembly, and the oil tank outlet hole is connected to the oil inlet of the oil injection channel through the pipeline 3 to facilitate the flow of oil from the oil supply device 2 to the oil coating device head 1 later.

[0063] An oil pushing piston 205 capable of moving up and down in the tank is matched in the oil tank 204, the upper part of the oil pushing piston 205 is connected to the hydraulic cylinder rod 207 extending downward in the hydraulic cylinder body 206, that is, the oil pushing piston 205 moves up and down under the pushing of the hydraulic cylinder rod 207, and pushes the oil in the oil tank 204 to flow out from the oil tank outlet hole beside.

[0064] The hydraulic cylinder body 206 is connected to the mechanical arm vertical arm 202 on one side through the hydraulic cylinder fixing plate 208, and the hydraulic station 203 provides a power source for the hydraulic cylinder body 206.

[0065] The mechanical arm vertical arm 202 in the embodiment can be a whole long vertical arm, or considering the actual installation problem, a plurality of (usually two) short vertical arms can be connected to form the whole mechanical arm vertical arm.

[0066] Further, a square hole is formed in the upper part of the mechanical arm vertical arm 202, and the end of a cross arm 209 penetrates into the square hole, a hooking structure 210 (specifically a small ring-like structure) is installed on the bottom surface of the end of the cross arm away from the mechanical arm vertical arm, one end of a rope hook 4 is connected to the hooking structure 210, and the other end can be connected to the spray head seat horizontal plate 101 (generally an opening is formed on the spray head seat horizontal plate to facilitate the connection of the rope hook), so that the oil supply device 2 and the oil coating device head 1 are connected together by the rope hook 4 when the oil coating device head 1 is not used later.

[0067] In order to realize reasonable layout, in the embodiment, the oil tank assembly and the hydraulic station 203 are separately arranged on the two sides of the mechanical arm vertical arm 202, the oil tank assembly comprises an oil tank seat 211 installed on the base plate 201, and an oil tank bottom cover 212 is adaptively placed in the upper tank seat opening of the oil tank seat 211, and the oil tank 204 is connected above the oil tank bottom cover 212.

[0068] The operation method and working principle of the present application are as follows:

[0069] The oil coating device head 1 is taken off from the rope hook 4, the worker holds the handle 129, and the protective cover 130 covers Figure 13The outer thread end of the drill pipe 5 is pushed in, and the device is centered under the action of the guide cone 125; when pushed to a certain position, the thrust bearing 124 contacts the drill pipe 5, at which time the hydraulic motor 105 can be started, the hydraulic motor 105 drives gear one 106 to rotate, gear one 106 drives gear two 107 to rotate, gear two 107 drives the end cover 108 to rotate, the end cover 108 drives the rotating disc 109 to rotate, the spray head 113 on the rotating disc 109 rotates around the drill pipe 5 surrounded; at this time, oil is fed into the fixed shaft oil injection channel 104; the oil supply device 2 is started, the hydraulic cylinder rod 207 and the oil pushing piston 205 move downward together, pushing the oil in the oil bucket 204 out, the oil goes out of the oil bucket 204, enters the fixed shaft oil injection channel 104 through the pipeline 3, and then flows out of the fixed shaft oil outlet hole 111 in the front end of the fixed shaft 103 into the annular closed cavity, and then the oil in the annular closed cavity enters the rotating disc oil outlet channel 112, and finally, the oil flows out of the oil outlet hole 115 of the spray head 115 to the surface of the drill pipe, and the spray head 113 is rotating around the drill pipe 5 at this time, and the oil can be uniformly brushed on the outer thread of the drill pipe 5 by the rotating brush 116.

[0070] When the oil brushing is completed, it is directly stopped, and the oiling device head 1 is directly hung on the cross arm 209 of the oil supply device by the rope hook 4.

[0071] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same and similar parts between various embodiments can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part description.

[0072] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lubricating device for the external thread of an oil well drill pipe, characterized in that, The application relates to a lubricating device head, which comprises a nozzle seat horizontal plate, two nozzle seat vertical plates arranged in parallel and connected below the nozzle seat horizontal plate, a rear shaft section of a fixed shaft assembled below the two nozzle seat vertical plates and limited to do circumferential movement, a fixed shaft oil injection channel formed in the fixed shaft, a hydraulic motor installed below the front side of the nozzle seat horizontal plate, a gear one connected to the hydraulic motor, a gear two rotatably connected to the outside of the front shaft section of the fixed shaft and engaged with the gear one, an end cover connected to the front side of the gear two, a rotating disc connected to the front side of the end cover, the fixed shaft sequentially penetrating the end cover and the rotating disc from front to back and rotatably connected between the fixed shaft and the rotating disc, an annular closed cavity formed in the shaft section of the fixed shaft matched with the rotating disc, a fixed shaft oil outlet hole formed in the shaft section of the fixed shaft matched with the rotating disc and connected between the fixed shaft oil injection channel and the annular closed cavity, a rotating disc oil outlet channel formed in the rotating disc and connected with the annular closed cavity, a nozzle fixed to the front side of the rotating disc, a nozzle oil path channel in the nozzle and communicated with the rotating disc oil outlet channel, a plurality of nozzle oil outlet holes formed in the side of the nozzle facing the drill rod and communicated with the nozzle oil path channel, and a plurality of bristles connected to the side wall and not interfering with the nozzle oil outlet holes. An oil supply device is connected with an oil injection channel inlet on the rear side of the fixed shaft, and is used for supplying oil to the lubricating device head and temporarily connecting the lubricating device head when not in use. The oil supply device comprises a bottom plate, an oil containing barrel assembly, a mechanical arm vertical arm and a hydraulic station installed above the bottom plate, an oil containing barrel oil outlet hole formed in the side wall of an oil containing barrel in the oil containing barrel assembly, the oil containing barrel oil outlet hole connected with the oil injection channel inlet through a pipeline, a push oil piston matched with the oil containing barrel and capable of moving up and down in the oil containing barrel, a hydraulic cylinder rod connected with a hydraulic cylinder body and extending downward above the push oil piston, the hydraulic cylinder body connected with the mechanical arm vertical arm on one side through a hydraulic cylinder fixing plate, and the hydraulic station providing a power source for the hydraulic cylinder body.

2. A lubricating device for the external thread of an oil well drill pipe according to claim 1, characterized in that, A square hole is formed in the upper side of the mechanical arm vertical arm, an end of a horizontal arm penetrates into the square hole, a hooking structure is installed on the bottom surface of the end of the horizontal arm away from the mechanical arm vertical arm, one end of a rope hook is connected with the hooking structure, and the other end of the rope hook is capable of being connected with the nozzle seat horizontal plate.

3. A lubricating device for the external thread of an oil well drill pipe according to claim 2, characterized in that, The oil containing barrel assembly and the hydraulic station are separately arranged on the two sides of the mechanical arm vertical arm, the oil containing barrel assembly comprises an oil containing barrel seat installed on the bottom plate, an oil containing barrel bottom cover matched and placed in the upper side barrel seat opening of the oil containing barrel seat, and the oil containing barrel is connected above the oil containing barrel bottom cover.

4. The lubricator for the pin thread of an oil well drill pipe according to claim 2, wherein A baffle is connected below each of the nozzle seat vertical plates, a square groove one is formed below the nozzle seat vertical plate, a square groove two is formed above the baffle and matched with the corresponding square groove one to form a square hole, the rear shaft section of the fixed shaft is assembled in the two square holes, and the matching part of the fixed shaft and the square hole is formed into a square surface to limit the circumferential movement of the fixed shaft.

5. The lubricator for the pin thread of an oil well drill pipe according to claim 1, wherein ​ 6. The lubricator for the pin thread of an oil well drill pipe according to claim 1, wherein The fixed shaft is rotatably connected with the gear through a conical roller bearing one, and rotatably connected with the rear side of the rotating disc through a conical roller bearing two; the end cover is assembled with an end cover sealing ring between the rotating disc, and the rotating disc is assembled with a rotating disc sealing ring between the fixed shaft; the annular closed cavity is located between the end cover sealing ring and the rotating disc sealing ring.

7. The lubricator for the pin thread of an oil well drill pipe according to claim 1, wherein The front end of the rotating disc is connected with a small shaft diameter section, the outer periphery of the small shaft diameter section is sleeved with a thrust bearing, and the front end of the small shaft diameter section is connected with a guide cone; the small shaft diameter section is connected with the fixed shaft through a deep groove ball bearing, and the deep groove ball bearing is fixed by a round nut assembled at the most front end of the fixed shaft.

8. The lubricator for the pin thread of an oil well drill pipe according to claim 1, wherein The left and right sides of the two nozzle seat vertical plates are connected by a connecting plate, and each connecting plate is connected with a handle on the outer side wall.

9. The lubricator for the pin thread of an oil well drill pipe according to claim 1, wherein The rotating disc is fixedly connected with two nozzles near the edge of the front side, and the two nozzles are oppositely arranged with the fixed shaft as the center.

10. A lubricating device for the external thread of an oil well drill rod as claimed in any one of claims 1 to 9, characterized in that, The outermost layer of the rotating disc is connected with a protective cover capable of covering the whole nozzle.

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