CN107774629A - A kind of cleaning device for screw threads of drill stems and method - Google Patents

Abstract

The invention relates to a cleaning device and method for drill pipe threads. Its technical solution is: it consists of a crawler machine, a control box, a fuel tank, a booster arm part, and a brush head part. A fuel tank is installed on the crawler machine, a filter chamber is arranged in the fuel tank, a cleaning oil pump motor is installed on the fuel tank, and an oil outlet of the fuel tank is installed. It is installed on the side of the cleaning oil pump motor, and the oil return port of the oil tank is installed on the side of the filter compartment of the oil tank; the brush head part adopts a brush male buckle assembly or a brush female buckle assembly, and is close to the drill pipe to be cleaned by a remote control crawler, and passes through The booster arm part moves the brush head part to the screw thread of the drill pipe for cleaning. The beneficial effects are: the cleaned oil is recovered to the oil tank through the oil return port at the lower part of the cleaning brush outer cylinder, and recycled after being filtered; it not only reduces the labor intensity of the workers, improves the cleaning efficiency and quality of the drill pipe; and ensures the drilling construction Underground safety also protects the occupational health of workers and the environment of the construction site.

Description

Device and method for cleaning drill pipe thread

technical field

The invention relates to a cleaning device for pipes at the drilling construction site, in particular to a cleaning device and method for drill pipe threads.

Background technique

In oil drilling construction, the drill pipe is an important part of the construction. The drill pipe transmits the power of the ground driving device to the bottom of the well, and the high-pressure drilling fluid is transported to the bottom of the well through the inside of the drill pipe to clean and circulate the formation cuttings cut by the drill bit. The drill pipe is composed of three parts: the drill pipe thread, the drill pipe joint and the drill pipe body. The drill pipe thread and joint steps must be carefully cleaned and inspected before the drill pipe goes into the well. After cleaning and inspecting the drill pipes in good condition, the drill pipes are connected and lowered into the well through the catwalk, suspension system, and hydraulic tongs. During the drilling construction process, the drill pipe not only bears large torque, bending moment and tension, but also withstands the erosion of high-temperature and high-pressure drilling fluid. The drill pipe thread and joint steps must be well sealed, and the cleaning of the drill pipe thread Inspection management is particularly important.

In the prior art, the cleaning and inspection work of the drill pipe thread is to manually clean the drill pipe thread with a wire brush, and then manually lift the diesel barrel and use diesel cotton yarn to clean the cleaned thread. The diesel cotton yarn is repeatedly used in diesel oil. When used in barrels, the diesel will become seriously dirty very quickly. The effect of the drill pipe thread that continues to be cleaned with dirty diesel oil and cotton yarn is very poor; if the drill pipe thread is not cleaned cleanly, it will directly affect the inspection quality, and the drill pipe with quality problems will be lowered when it is lowered into the well. It causes great safety hazards; manual cleaning with diesel cotton yarn has occupational health hazards; open cleaning has a certain impact on the construction site environment.

Contents of the invention

The purpose of the present invention is to provide a drilling pipe thread cleaning device and method for the above-mentioned defects in the prior art, which are highly efficient, safe and environmentally friendly, simple to operate, and highly automated.

A cleaning device for drill pipe threads mentioned in the present invention has a technical solution: it consists of a crawler machine (14), a control box (15), an oil tank (17), a booster arm part, and a brush head part. The crawler machine A fuel tank (17) is installed on (14), and a filter chamber is arranged in the fuel tank (17). A cleaning oil pump motor (19) is installed on the fuel tank (17), and the oil tank outlet (18) is arranged on the cleaning oil pump motor (19). On one side, the fuel tank return port (16) is installed on the side of the fuel tank filter chamber;

The control box (15) is installed at the front end of the crawler machine (14), the power supply of the control box (15) is provided by the track machine (14), and a cleaning oil pump motor (19) and a cleaning brush drive motor ( 2) The linkage control device;

The booster arm part includes a booster arm rotation table (1), a booster arm (12), and a booster rod (13), and the booster arm rotation table (1) is the installation of the booster arm (12) and the booster rod (13). On the platform, two rods of the booster arm (12) are installed on the upper part, and the support of the booster rod (13) is installed on the lower part;

The brush head part adopts a brush male buckle assembly or a brush female buckle assembly, and the remote control crawler is close to the drill pipe to be cleaned, and the brush head part is moved to the drill pipe thread by the assist arm part for cleaning.

Preferably, the above-mentioned brush male buckle assembly includes a cleaning brush drive motor (2), a cleaning brush outer cylinder (4), a cleaning brush cylinder (5), and a cleaning brush (6), and the cleaning brush cylinder (5) has a cone structure , the surface of the cleaning brush cylinder (5) is processed with multiple oil outlet holes (7.1), and the inner wall of the cleaning brush cylinder (5) is axially evenly distributed with multiple dovetail grooves, and each dovetail groove is embedded with a cleaning brush (6) , the cleaning brush drive motor (2) drives the cleaning brush tube (5) and the cleaning brush (6) to rotate together to clean the drill pipe thread (8); the outside of the cleaning brush tube (5) is provided with a cleaning brush outer tube (4 ), the outer end of the cleaning brush outer cylinder (4) is provided with a rubber sealing ring (5.3), which is flexibly connected with the drill pipe joint (9) through the rubber sealing ring (5.3).

Preferably, the inner wall of the cleaning brush cylinder (5) is provided with an end cleaning brush (5.5), and the root of the male buckle (8.1) is cleaned by the end cleaning brush (5.5).

Preferably, the above-mentioned brush female buckle assembly includes an end brush fixing seat (5.1), an end cover (5.2), a rubber sealing ring (5.3), a fixing nut (5.4), an end cleaning brush (5.5), a tapered cleaning body (5.6), cleaning brush support (5.7), outer cleaning cylinder (5.8), the outer end of the outer cleaning cylinder (5.8) is provided with an end brush fixing seat (5.1), and the inner end is provided with a rubber sealing ring (5.3) , the end brush fixing seat (5.1) of the inner cavity of the outer cleaning cylinder (5.8) is provided with a plurality of end cleaning brushes (5.5), and the inner cavity of the outer cleaning cylinder (5.8) is provided with a tapered cleaning body (5.6), Cleaning brushes (6) are installed on the outside of the tapered cleaning body (5.6) through multiple cleaning brush supports (5.7), and an oil return port (7) is provided at the bottom of the outer cleaning cylinder (5.8), and the outer cleaning cylinder (5.8) There is a cleaning brush oil inlet (3) at the bottom of the outer wall; the cleaning brush drive motor (2) rotates to drive the end brush fixing seat (5.1) and the tapered cleaning body (5.6) to rotate, so that the cleaning brush (6) is aligned with the female buckle Clean and clean the box end (9.1) of the drill pipe joint (9) with the end cleaning brush (5.5).

Preferably, after the above-mentioned outer cleaning cylinder (5.8) is inserted into the female button of the drill pipe joint (9), the outer cleaning cylinder (5.8) on the left side is sleeved on the outer wall of the drill pipe joint (9), and passes through the rubber sealing ring ( 5.3) Connect the outer cleaning cylinder (5.8) to the drill pipe joint (9) in a sealed manner, and connect the cleaning brush drive motor (2) to the right part.

Preferably, the above-mentioned booster arm (12) is a four-bar mechanism, which is composed of two rods, the booster arm rotation platform (1) and the brush handle rotation platform (11) installed at the front of the crawler (14). The booster arm (12) controls the distance between the brush head part and the drill pipe thread (8) through the rotation of the booster arm rotary table (1).

Preferably, the above-mentioned booster rod (13) is a telescopic structure with a spring inside, and the spring of the booster rod (13) overcomes the power of the booster arm (12), the brush handle rotating table (11), the brush handle (10), and the brush head. part of the gravity to achieve the purpose of labor-saving operation, the booster rod (13) is installed at the lower part of the booster arm (12), and the height of the booster arm (12) can be adjusted through the expansion and contraction of the booster rod (13) to control the height of the brush head assembly Location.

Preferably, the above-mentioned brush handle rotating table (11) is a combined structure, the brush handle rotating table (11) is a connection platform between the booster arm (12) and the brush handle (10), and the booster arm (12) is installed on one side On the upper part of the root rod, the brush handle rotating table (11) moves up and down with the booster arm (12), and always keeps horizontal movement, and the brush handle (10) on the other side is vertically installed on the brush handle rotating table (11), which can realize horizontal direction swing.

Preferably, the above-mentioned brush handle 10 is made of a 1-inch thickened steel pipe, the brush handle (10) is at an angle of 45° to the horizontal direction, and the lower part of the brush handle (10) is installed on the brush handle rotating platform (11). A motor control switch is installed at the grip position of the handle (10), and the upper part of the brush handle (10) is fixedly connected with the brush head part by high elasticity, and the brush head part is kept in a horizontal direction.

A method for using a drill pipe thread cleaning device mentioned in the present invention comprises the following steps:

1) One person carries a remote control, and the remote control crawler is parallel to the placed drill pipe thread, so that the drill pipe thread cleaning device is close to the drill pipe thread to be cleaned, and the brush male thread assembly is used to clean the drill pipe male thread As part of the brush head, the brush female button assembly is used as the brush head part when cleaning the female button;

2) Hold the brush handle, press down the booster arm, the spring of the booster rod is compressed, the control brush head part and the threaded thread of the drill pipe to be cleaned are kept at the same level, push the brush handle, the rotary table of the booster arm and the rotary table of the brush handle rotate relative to each other. The brush head assembly is aligned with the drill pipe thread, and the cleaning brush cylinder is pushed to the surface of the drill pipe thread, and the rubber sealing ring of the outer cylinder of the cleaning brush seals the outer surface of the drill pipe joint to prevent the oil from cleaning the drill pipe thread from being thrown out. ;

3) Press the brush handle motor control switch, the cleaning oil pump motor and the cleaning brush drive motor rotate together, the cleaning brush drive motor drives the cleaning brush barrel, and the cleaning brush is on the drill pipe thread and the root of the pin (8.1) or the end of the box (8.1). 9.1) Clean the step surface of the joint, clean the oil pump motor to pump the diesel oil through the oil outlet of the fuel tank to the oil inlet of the cleaning brush, spray it into the cleaning brush barrel, clean the threaded thread of the drill pipe and the step surface of the joint with the clean diesel oil, and clean The oil from the threaded thread of the drill pipe is thrown onto the inner wall of the outer cylinder of the cleaning brush, and flows back to the oil return port of the oil tank through the oil return port at the lower part of the outer cylinder of the cleaning brush. Sent to the drill pipe thread and joint step surface for closed cycle cleaning;

4) Loosen the brush handle motor control switch, hold the brush handle to exit the drill pipe thread, and clean the next drill pipe thread.

The beneficial effects of the present invention are: the present invention solves the problem of manual cleaning of drill pipe threads. Firstly, according to the working environment and terrain in the field, a crawler vehicle is used to carry a complete set of cleaning devices, and the operator only needs to walk to the Near the drill pipe thread, hold the brush handle with power assist to clean the drill pipe thread in a closed manner. The cleaned oil is recycled to the oil tank through the oil return port at the lower part of the cleaning brush outer cylinder, and recycled after filtration; it not only saves the labor force It reduces the labor intensity and improves the cleaning efficiency and quality of the drill pipe; it not only ensures the safety of the drilling construction downhole, but also protects the occupational health of the workers and the environment of the construction site.

Description of drawings

Accompanying drawing 1 is the top view of the present invention;

Accompanying drawing 2 is a side view of the present invention;

Accompanying drawing 3 is the perspective view of the present invention;

Accompanying drawing 4 is the use state diagram of brush male buckle assembly;

Accompanying drawing 5 is the semi-sectional schematic diagram of brush pin assembly;

Accompanying drawing 6 is the semi-sectional schematic diagram of brush female buckle assembly;

Accompanying drawing 7 is the use state diagram of brush female buckle assembly;

In the figure above: booster arm rotary table 1, cleaning brush drive motor 2, cleaning brush oil inlet 3, cleaning brush outer cylinder 4, cleaning brush barrel 5, cleaning brush 6, oil return port 7, drill pipe thread 8, drill Rod joint 9, brush handle 10, brush handle rotary table 11, booster arm 12, booster rod 13, crawler machine 14, control box 15, fuel tank return port 16, fuel tank 17, fuel tank oil outlet 18, cleaning oil pump motor 19;

End brush fixing seat 5.1, end cover 5.2, rubber sealing ring 5.3, fixing nut 5.4, end cleaning brush 5.5, tapered cleaning body 5.6, cleaning brush support 5.7, outer cleaning cylinder 5.8, oil outlet hole 7.1, male buckle 8.1 at the root and 9.1 at the end of the female buckle.

Detailed ways

The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

Embodiment 1, a kind of drill pipe thread cleaning device mentioned in the present invention, its technical proposal is: comprise crawler machine 14, control box 15, oil tank 17, booster arm part, brush head part, and described crawler machine 14 An oil tank 17 is installed, and a filter chamber is arranged in the oil tank 17. A cleaning oil pump motor 19 is installed on the oil tank 17. The oil outlet 18 of the oil tank is arranged on the side of the cleaning oil pump motor 19, and the oil return port 16 of the oil tank is installed on one side of the oil tank filter chamber;

The control box 15 is installed on the front end of the crawler machine 14, the power supply of the control box 15 is provided by the crawler machine 14, and the linkage control device of the cleaning oil pump motor 19 and the cleaning brush drive motor 2 is arranged inside;

The booster arm part includes a booster arm rotary table 1, a booster arm 12, and a booster rod 13. The booster arm rotary table 1 is an installation platform for the booster arm 12 and the booster rod 13, and two rods of the booster arm 12 are installed on the upper part. , the support of the booster rod 13 is installed at the bottom;

The brush head part adopts a brush male buckle assembly or a brush female buckle assembly, and the remote control crawler is close to the drill pipe to be cleaned, and the brush head part is moved to the drill pipe thread by the assist arm part for cleaning.

Referring to accompanying drawings 4-5, the above-mentioned brush male buckle assembly includes a cleaning brush drive motor 2, a cleaning brush outer cylinder 4, a cleaning brush cylinder 5, and a cleaning brush 6. The cleaning brush cylinder 5 is a cone structure, and the surface of the cleaning brush cylinder 5 is A plurality of oil outlet holes 7.1 are processed, and a plurality of dovetail grooves are evenly distributed axially on the inner wall of the cleaning brush cylinder 5, and a cleaning brush 6 is embedded in each dovetail groove, and the cleaning brush drive motor 2 drives the cleaning brush cylinder 5 and the cleaning brush 6 together to rotate and clean the drill pipe thread 8; the outer side of the cleaning brush cylinder 5 is provided with a cleaning brush outer cylinder 4, and the outer end of the cleaning brush outer cylinder 4 is provided with a rubber sealing ring 5.3, which is connected with the drill pipe joint through the rubber sealing ring 5.3 9 active connections.

Preferably, the inner wall of the cleaning brush tube 5 is provided with an end cleaning brush 5.5, and the root portion 8.1 of the male buckle is cleaned by the end cleaning brush 5.5.

In addition, the above-mentioned booster arm 12 is a four-bar mechanism, which is composed of two rods and the booster arm turntable 1 and the brush handle turntable 11 installed on the front of the crawler 14. The booster arm 12 passes through the booster arm turntable. The distance of the rotation control brush head portion and the drill pipe thread 8 of 1.

Preferably, the above-mentioned booster rod 13 is a telescopic structure with a spring inside. The spring of the booster rod 13 overcomes the gravity of the booster arm 12, the brush handle rotating table 11, the brush handle 10, and the brush head to achieve the purpose of labor-saving operation. The booster rod 13 is installed on the lower part of the booster arm 12, and the height of the booster arm 12 is adjusted through the expansion and contraction of the booster rod 13 to control the height of the brush head assembly.

Preferably, the above-mentioned brush handle turntable 11 is a combined structure, and the brush handle turntable 11 is a connection platform between the booster arm 12 and the brush handle 10, and the upper parts of the two rods of the booster arm 12 are installed on one side, and the brush handle turntable 11 moves up and down with the booster arm 12, and keeps moving horizontally all the time, and the brush handle 10 on the other side is vertically installed on the brush handle rotating table 11, which can realize the swing in the horizontal direction.

Preferably, the above-mentioned brush handle 10 is made of a 1-inch thickened steel pipe, and the brush handle 10 is at an angle of 45° to the horizontal direction. There is a motor control switch, and the upper part of the brush handle 10 is fixedly connected with the brush head part by high elasticity, and the brush head part maintains a horizontal direction.

A method for using a drill pipe thread cleaning device mentioned in the present invention comprises the following steps:

1) One person carries a remote control, and the remote control crawler is parallel to the placed drill pipe thread, so that the drill pipe thread cleaning device is close to the drill pipe thread to be cleaned, and the brush male thread assembly is used to clean the drill pipe male thread As part of the brush head, the brush female button assembly is used as the brush head part when cleaning the female button;

2) Hold the brush handle, press down the booster arm, the spring of the booster rod is compressed, the control brush head part and the threaded thread of the drill pipe to be cleaned are kept at the same level, push the brush handle, the rotary table of the booster arm and the rotary table of the brush handle rotate relative to each other. The brush head assembly is aligned with the drill pipe thread, and the cleaning brush cylinder is pushed to the surface of the drill pipe thread. There are 3 taper positioning blocks on the outer cylinder of the cleaning brush to contact and position the surface of the drill pipe joint 9 to ensure that the cleaning brush 6 is in contact with the drill pipe thread. The rod thread 8 is evenly contacted, and the rubber sealing ring of the outer cylinder of the cleaning brush seals the outer surface of the drill pipe joint to prevent the oil from cleaning the drill pipe thread from being thrown out;

3) Press the brush handle motor control switch, the cleaning oil pump motor and the cleaning brush drive motor rotate together, the cleaning brush drive motor drives the cleaning brush barrel, and the cleaning brush is connected to the joint of the drill pipe thread and the root of the male buckle 8.1 or the end of the female buckle 9.1 The step surface is cleaned, and the cleaning oil pump motor pumps the diesel oil through the oil outlet of the fuel tank to the oil inlet of the cleaning brush, and sprays it into the cleaning brush barrel. The clean diesel oil cleans the drill pipe thread and the joint step surface, and the drill pipe thread is cleaned The oil is thrown onto the inner wall of the outer cylinder of the cleaning brush, and flows back to the oil return port of the oil tank through the oil return port at the lower part of the outer cylinder of the cleaning brush. After filtering, the diesel oil enters the oil tank, and the cleaning oil pump motor continuously pumps the filtered diesel oil to the drill pipe. Closed cycle cleaning of threaded buckle and joint step surface;

4) Loosen the brush handle motor control switch, hold the brush handle to exit the drill pipe thread, and clean the next drill pipe thread.

Embodiment 2, with reference to the accompanying drawings 6-7, the brush head part mentioned in the present invention can be used to brush the female buckle assembly, and its technical solution is to include the end brush fixing seat 5.1, the end cover 5.2, the rubber sealing ring 5.3, the fixing nut 5.4, end cleaning brush 5.5, tapered cleaning body 5.6, cleaning brush support 5.7, outer cleaning cylinder 5.8, the outer end of the outer cleaning cylinder 5.8 is provided with an end brush fixing seat 5.1, and the inner end is provided with a rubber sealing ring 5.3, The end brush fixing seat 5.1 of the inner cavity of the outer cleaning cylinder 5.8 is provided with a plurality of end cleaning brushes 5.5, and the inner cavity of the outer cleaning cylinder 5.8 is provided with a tapered cleaning body 5.6, and the outside of the tapered cleaning body 5.6 passes through multiple cleaning brushes The support 5.7 is equipped with a cleaning brush 6, and the bottom of the outer cleaning cylinder 5.8 is provided with an oil return port 7, and the bottom of the outer wall of the outer cleaning cylinder 5.8 is provided with a cleaning brush oil inlet 3; the cleaning brush drives the motor 2 to rotate and drive the end brush to fix The seat 5.1 and the tapered cleaning body 5.6 rotate to make the cleaning brush 6 clean the box, and the end of the box 9.1 of the drill pipe joint 9 is cleaned by the end cleaning brush 5.5.

Among them, after the above-mentioned outer cleaning cylinder 5.8 is inserted into the box of the drill pipe joint 9, the outer cleaning cylinder 5.8 on the left side is sleeved on the outer wall of the drill pipe joint 9, and the outer cleaning cylinder 5.8 is connected to the drill pipe joint through the rubber sealing ring 5.3. 9 sealed connections, the right part is connected with the cleaning brush drive motor 2.

The entire cleaning process of the present invention is a closed cleaning process, which avoids environmental pollution during manual cleaning of drill pipe threads. The whole working process is semi-automatically controlled, saving time and effort, replacing the manual labor of cleaning drill pipe threads with a wire brush in many buckets, and improving the efficiency and quality of cleaning drill pipe threads

The above descriptions are only some of the preferred embodiments of the present invention, and any person skilled in the art may modify the technical solutions described above or modify them into equivalent technical solutions. Therefore, any simple modification or equivalent replacement made according to the technical solution of the present invention falls within the protection scope of the present invention.

Claims (10)

1. a kind of cleaning device for screw threads of drill stems, it is characterized in that：Including tracked machine（14）, control cabinet（15）, fuel tank（17）, power assistant arm Partly, brushhead portion forms, the tracked machine（14）On fuel tank is installed（17）, fuel tank（17）It is interior to be provided with filtering cabin, fuel tank （17）On be mounted with clean Oil pump electrical machinery（19）, fuel tank oil-out（18）It is arranged on cleaning Oil pump electrical machinery（19）Side, fuel tank return Hydraulic fluid port（16）Installed in oil-tank filtering storehouse side；

Described control cabinet（15）Installed in tracked machine（14）Front end, described control cabinet（15）Power supply by tracked machine（14）Carry For being inside provided with cleaning Oil pump electrical machinery（19）With cleaning brush drive motor（2）Linkage control device；

The power-assisted arm section includes power assistant arm turntable（1）, power assistant arm（12）, assister bar（13）, described power assistant arm rotation Platform（1）It is power assistant arm（12）With assister bar（13）Mounting platform, top installation power assistant arm（12）Two rod members, bottom installation Assister bar（13）Bearing；

The brushhead portion uses brush pin thread assembly or brush box assembly, by being remotely controlled tracked machine close to brill to be cleaned Bar, brushhead portion is moved at drilling rod thread by power-assisted arm section and cleaned.

2. cleaning device for screw threads of drill stems according to claim 1, it is characterized in that：Described brush pin thread assembly includes cleaning Brush drive motor（2）, cleaning brush outer barrel（4）, cleaning brush pot（5）, cleaning brush（6）, clean brush pot（5）For cone cylinder structure, cleaning Brush pot（5）Surface Machining has multiple oil outlets（7.1）, clean brush pot（5）The axially uniform a plurality of dovetail groove of inwall, Mei Geyan A cleaning brush is bumped into stern notch（6）, clean brush drive motor（2）Driving cleaning brush pot（5）And cleaning brush（6）Rotate together with clear Manage drilling rod thread（8）；The cleaning brush pot（5）Outside be provided with cleaning brush outer barrel（4）, cleaning brush outer barrel（4）Outer end be provided with Rubber seal ring（5.3）, pass through rubber seal ring（5.3）With tool joint（9）It is flexibly connected.

3. cleaning device for screw threads of drill stems according to claim 2, it is characterized in that：The cleaning brush pot（5）Inwall be provided with End cleaning brush（5.5）, pass through end cleaning brush（5.5）To pin thread root（8.1）Cleaned.

4. cleaning device for screw threads of drill stems according to claim 1, it is characterized in that：Described brush box assembly includes end Brush fixed seat（5.1）, end cap（5.2）, rubber seal ring（5.3）, fixing nut（5.4）, end cleaning brush（5.5）, taper it is clear Wash body（5.6）, cleaning brush bearing（5.7）, outer wash bowl（5.8）, outer wash bowl（5.8）Outer end be provided with end brush fixed seat （5.1）, the inner is provided with rubber seal ring（5.3）, in outer wash bowl（5.8）Inner chamber end brush fixed seat（5.1）Provided with more Individual end cleaning brush（5.5）, in outer wash bowl（5.8）Inner chamber be provided with taper cleaning body（5.6）, taper cleaning body（5.6）Outside Side passes through more cleaning brush bearings（5.7）Cleaning brush is installed（6）, and in outer wash bowl（5.8）Bottom be provided with oil return opening（7）, Outer wash bowl（5.8）Outer wall bottom be provided with cleaning brush oil inlet（3）；By cleaning brush drive motor（2）Rotation driving end Brush fixed seat（5.1）Body is cleaned with taper（5.6）Rotation, makes cleaning brush（6）Box is cleaned, and passes through end cleaning brush （5.5）To tool joint（9）Box end（9.1）Cleaned.

5. cleaning device for screw threads of drill stems according to claim 4, it is characterized in that：Described outer wash bowl（5.8）Insertion is bored Knock-off joint（9）Box after, the outer wash bowl of left part（5.8）It is enclosed on tool joint（9）Outer wall, and pass through rubber seal Ring（5.3）Make outer wash bowl（5.8）With tool joint（9）It is tightly connected, right part connection cleaning brush drive motor（2）.

6. cleaning device for screw threads of drill stems according to claim 1, it is characterized in that：Described power assistant arm（12）For four bar machines Structure, by two rod members and it is arranged on tracked machine（14）Anterior power assistant arm turntable（1）With brush holder turntable（11）Form, it is described Power assistant arm（12）Pass through power assistant arm turntable（1）Rotation control brushhead portion and drilling rod thread（8）Distance.

7. cleaning device for screw threads of drill stems according to claim 1, it is characterized in that：Described assister bar（13）It is flexible knot Structure, inside are equipped with spring, assister bar（13）Spring, overcome power assistant arm（12）, brush holder turntable（11）, brush holder（10）, brush Partial gravity, reach the purpose of rapid operation, the assister bar（13）Installed in power assistant arm（12）Bottom, pass through assister bar （13）Telescopic adjustment power assistant arm（12）Height, control brush assembly high and low position.

8. cleaning device for screw threads of drill stems according to claim 1, it is characterized in that：Described brush holder turntable（11）It is combination Structure, the brush holder turntable（11）It is power assistant arm（12）With brush holder（10）Connecting platform, side installation power assistant arm（12）Two The top of root rod member, brush holder turntable（11）With power assistant arm（12）Move up and down, remain horizontal movement, opposite side brush holder （10）It is vertically mounted on brush holder turntable（11）On, the swing of horizontal direction can be achieved.

9. cleaning device for screw threads of drill stems according to claim 8, it is characterized in that：Described brush holder 10 is 1 cun of thickened steel-tube It is made, brush holder（10）It is in 45° angle with horizontal direction, brush holder（10）Bottom is arranged on brush holder turntable（11）On, the brush holder （10）Hand griping position is provided with motor control switch, brush holder（10）Top is fixedly connected with brushhead portion using high-elastic, brushhead Divide and keep horizontal direction.

10. a kind of application method of cleaning device for screw threads of drill stems as claimed in any one of claims 1-9 wherein, it is characterized in that：Bag Include following steps：

1）One people carries remote control, and remote control tracked machine is parallel with the drilling rod thread put, and leans on cleaning device for screw threads of drill stems Nearly drilling rod thread to be cleaned, used when cleaning drilling rod pin thread using brush pin thread assembly as brushhead portion when cleaning box Brush box assembly is as brushhead portion；

2）Brush holder is held, depresses power assistant arm, assister bar spring is compressed, and control brushhead portion is maintained at drilling rod thread to be cleaned Same level, brush holder is promoted, power assistant arm turntable relatively rotates with brush holder turntable makes brush assembly align drilling rod thread, will Cleaning brush pot shifts drilling rod thread surface onto, the rubber seal ring of cleaning brush outer barrel, seals up tool joint outer surface, prevents from cleaning The greasy dirt of drilling rod thread is thrown away；

3）Brush holder motor control switch is pressed, cleaning Oil pump electrical machinery rotates together with cleaning brush drive motor, cleaning brush driving electricity Machine driving cleaning brush pot, cleaning brush is to drilling rod thread and pin thread root（8.1）Or box end（9.1）Joint step surface carry out Diesel oil is pumped to cleaning brush oil inlet by cleaning, cleaning Oil pump electrical machinery through fuel tank oil-out, is ejected into cleaning brush pot, cleaning Diesel oil cleans drilling rod thread and joint step surface, and the greasy dirt for having cleaned drilling rod thread is thrown on the inwall of cleaning brush outer barrel, through clear The oil return opening of outer barrel bottom is scrubbed, flows back to tank drainback mouth, fuel tank is entered after diesel oil filtering, cleaning Oil pump electrical machinery is by after filtering Diesel oil is constantly pumped into drilling rod thread and joint step surface carries out closed circulation cleaning；

4）Brush holder motor control switch is unclamped, brush holder is held and exits drilling rod thread, clean next drilling rod thread.