CN211081764U - Rotary mud gun - Google Patents

Abstract

The utility model relates to a rotary mud gun, which comprises a mud gun vertical pipe, wherein the lower end of the mud gun vertical pipe is connected with a central sleeve pipe which extends downwards, a rotary outer sleeve is sleeved on the periphery of the central sleeve pipe, an upper inner step of the rotary outer sleeve is supported on an outer step on the upper part of the central sleeve pipe through an upper bearing, and a middle inner step of the rotary outer sleeve is supported on an outer step in the middle of the central sleeve pipe through a lower bearing; a rotary outer sleeve flange is arranged on the periphery of the middle section of the rotary outer sleeve, and a plurality of rotary outer sleeve positioning holes are uniformly distributed on the circumference of the rotary outer sleeve flange; the lower port of the rotary outer sleeve is screwed with a spray head, the lower end of the spray head is provided with a hyperbolic elbow which extends downwards and outwards, and the hyperbolic elbow is provided with a horizontal tangential spray nozzle which is away from the axis of a vertical pipe of the mud gun by a certain distance. The upper and lower parts of the vertical pipe of the mud gun are respectively fixed with a hoop, the free end of the supporting rod of the hoop is respectively provided with a lantern ring, the operating rod penetrates through the lantern ring, and the lower end of the operating rod is provided with a rotation stopping bolt. The mud gun can eliminate the tank internal circulation dead angle and reduce the tank cleaning workload.

Description

Rotary mud gun

Technical Field

The utility model relates to a mud gun that mud tank clearance deposit was used, in particular to rotatory mud gun belongs to well drilling appurtenance technical field.

Background

In the drilling construction, one of the main functions of the drilling fluid is to carry rock debris of a shaft, but the flow speed is rapidly reduced after the drilling fluid reaches a mud tank from the shaft, a lot of mud and sand are deposited at the bottom of the tank, are particularly accumulated at the edge and four corners of the tank and cannot be smoothly removed by solid control equipment, so that the effective volume of the mud tank is reduced, a water feeding pipeline of a mud pump is buried, the water feeding efficiency is influenced, the underground safety is seriously influenced, and the tank cleaning workload is also large during well completion. In addition, when the drilling fluid is weighted or other materials are added, the newly added materials are mixed with the drilling fluid in the tank, when the newly added materials flow to the middle of the two stirrers to form an equilibrium state or flow to a place where the action of the stirrers cannot be achieved, the materials are gradually precipitated more and more along with the prolonging of time, and a large amount of accumulation and material waste can be caused.

In order to solve the problems, mud guns are arranged in the mud tanks, and mud sand precipitated at the bottoms of the tanks enters the solid control equipment again to be convenient to clear by flushing the pumps, or newly added materials are quickly and fully mixed with drilling fluid in the tanks.

The mud gun in the prior art can not adjust the direction of the nozzle, can only wash towards one direction, has a large number of dead angle areas, and still can not well eliminate the accumulation of mud and sand and the waste of newly added materials.

In recent years, the chinese utility model patent with publication number CN 202970555U discloses a "rotation type mud gun rotor for solid control system", installs rotor system in the lower part of the vertical pipeline of mud gun in the jar, through adjusting the fastening screw on the rotor, realizes the free rotation and the fixing of rotor, realizes the washing away of tank bottoms silt. The chinese utility model patent with publication number CN 205089247U discloses a multi-angle rotating mud gun, which is mainly to remove settled sand at dead angles at the tank bottom by manually controlling the combination of two rotating devices according to the requirement and rotating to different required angles. Chinese utility model patent with publication number CN 203742497U discloses "an autogiration mud gun for maintaining drilling fluid", mainly through the special design of rotary assembly, spray gun mouth structure, produces the effort when making the injection drilling fluid, promotes the nozzle and rotates, through the speed governing board and the speed governing drum elasticity on the regulation rotary assembly, control rotation speed.

The rotary mud gun can only enter the tank to be manually adjusted when no drilling fluid exists in the tank. During normal production, because the jar interior mud is more full, need put the thick liquid or pour the drilling fluid into other jars when adjusting the nozzle direction, lead to the drilling fluid extravagant, increase environmental pollution and increase work load. In addition, when the workman goes down to adjust the nozzle direction in the jar, the jar is wet smooth, has rotatable equipment such as agitator, and personnel have safety risks such as slipping, mechanical stirring wound.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the problem that exists among the prior art, provide a rotatory mud gun, can eliminate tank inner loop dead angle, reduce the interior precipitate of jar, alleviate clear jar work load for join in marriage thick liquid circulation rate simultaneously, make jar interior mud rapidly even.

In order to solve the technical problem, the utility model discloses a rotary mud gun, including mud gun standpipe and the shower nozzle that is located mud gun standpipe lower extreme, the lower extreme of mud gun standpipe has the central sleeve pipe of downwardly extending through flange joint, the periphery cover of central sleeve pipe is equipped with the rotatory overcoat, the lower port of rotatory overcoat has connect soon through the left hand thread the shower nozzle, the lower extreme of shower nozzle is equipped with the downward and outwardly extending hyperbolic elbow, the hyperbolic elbow has the horizontal tangential spout that is a distance away from mud gun standpipe axis; a rotating outer sleeve flange is arranged on the periphery of the middle section of the rotating outer sleeve, and a plurality of rotating outer sleeve positioning holes which are vertically communicated are uniformly distributed on the circumference of the rotating outer sleeve flange; an upper clamp is fixed on the upper part of the vertical pipe of the mud gun, an upper clamp supporting rod extending outwards in the radial direction is connected to the outer wall of the upper clamp, a circular lantern ring is arranged at the free end of the upper clamp supporting rod, and the axis of the circular lantern ring is parallel to the axis of the vertical pipe of the mud gun; a lower hoop is fixed at the lower part of the vertical pipe of the mud gun, a lower hoop supporting rod extending outwards along the radial direction is connected to the outer wall of the lower hoop, a C-shaped lantern ring with an opening at the outer side is arranged at the free end of the lower hoop supporting rod, and the C-shaped lantern ring and the circular lantern ring share the same axis; the middle section of the operating lever passes through the circular sleeve ring and the C-shaped sleeve ring, and the lower end of the operating lever is provided with a rotation stopping bolt which can be inserted into a positioning hole of a certain rotating outer sleeve.

Compared with the prior art, the utility model discloses following beneficial effect has been obtained: the mud flows down along the vertical pipe of the mud gun, enters the spray head through the central sleeve and is finally sprayed out from the horizontal tangential nozzle of the spray head. Because the horizontal tangential nozzle has a certain distance with the axis of the slurry gun standpipe, namely, the radius R exists, when slurry is sprayed out from the horizontal tangential nozzle at a high speed, a large reaction force is generated, the reaction force drives the spray head and the rotating outer sleeve to rotate continuously around the axis of the slurry gun standpipe, so that the periodic scouring of the tank bottom is realized, and no dead angle is left. Go up the clamp and can adopt two hough concatenations to form with lower clamp, embrace the dress on the mud gun standpipe through the bolt fastening, go up the circular lantern ring of clamp and the C shape lantern ring of lower clamp and play the guide effect, the lift of the control lever of being convenient for. When the rotation-stopping bolt at the lower end of the operating rod is inserted into a positioning hole of a certain rotating outer sleeve, the rotating outer sleeve flange and the rotating outer sleeve are forcibly fixed, and the spray head performs directional washing. A plurality of rotary outer sleeve positioning holes are uniformly distributed on the circumference of the rotary outer sleeve flange, so that the spray head can select a plurality of required spray directions. The product is fast, simple and convenient to operate, and eliminates a plurality of potential safety hazards caused by the fact that workers can only enter the tank to adjust in the conventional device. When the operating rod is lifted to separate the rotation stopping bolt at the lower end from the positioning hole of the rotary outer sleeve, the sprayer is recovered to continuously rotate and wash.

As the utility model discloses an improvement, the well lower part of control rod is equipped with the control rod boss, the lower terminal surface of control rod boss supports C shape lantern ring top, the top of control rod boss supports there is the spring, the spring suit is in the periphery of action bars, and the upper end of spring has pressed the spring holder, the top of spring holder is located the below of the circular lantern ring. The spring seat and the operating lever boss are limited by the circular lantern ring and the C-shaped lantern ring respectively, the spring is compressed between the upper clamp and the lower clamp, and the rotation stopping bolt at the lower end of the operating lever is kept inserted into the rotating outer sleeve positioning hole by the tension applied to the operating lever boss by the spring and cannot be separated due to vibration.

As a further improvement, the below of control rod boss is equipped with along radial outside convex control rod locking piece, the control rod locking piece is the same at direction of height's cross sectional shape, and the thickness of control rod locking piece is less than the breach width of the C shape lantern ring, the top of control rod is fixed with the hand wheel. When the operating lever is pulled up by manually overcoming the tension of the spring, the operating lever locking block penetrates through the notch of the C-shaped sleeve ring, after the operating lever locking block reaches the upper part of the C-shaped sleeve ring, the operating lever is rotated through the hand wheel, the operating lever locking block deviates from the original phase, for example, rotates by 90 degrees, the operating lever is loosened at the moment, the tension of the spring pushes the operating lever to move downwards until the operating lever locking block is located on the C-shaped sleeve ring, the operating lever can be kept at a high position, the rotation stopping bolt at the lower end of the operating lever cannot contact the rotating outer sleeve positioning hole, and the spray head is stabilized.

As a further improvement of the present invention, an upper bearing is installed above the inner step of the upper portion of the rotating outer sleeve, an inner ring of the upper bearing abuts against below the first outer step of the upper portion of the central sleeve, an upper bearing cover is fixed to an upper port of the rotating outer sleeve through a screw, and a lower end face flange of the upper bearing cover is pressed above an outer ring of the upper bearing; the bearing is characterized in that a lower bearing is installed below the inner step in the middle of the rotary outer sleeve, the inner ring of the lower bearing is abutted against the lower portion of the outer step in the middle of the central sleeve, a lower bearing cover is arranged below the lower bearing, a flange on the upper end face of the lower bearing cover is abutted against the lower portion of the inner ring of the lower bearing, the lower end face of the lower bearing cover is supported on a locking nut, and the locking nut is screwed on the lower portion thread of the central sleeve. The upper bearing cover and the inner step of the rotary outer sleeve carry out axial positioning on the upper bearing together, the locking nut carries out axial positioning on the lower bearing cover, the lower bearing cover carries out axial positioning on the lower bearing, and the upper bearing and the lower bearing enable the rotation of the rotary outer sleeve to be more flexible, so that the resistance and the abrasion are reduced.

As a further improvement of the utility model, the middle section of the rotating outer sleeve is provided with an outer sleeve reducing section which divides the inner cavity of the rotating outer sleeve into an upper bearing cavity and a lower bearing cavity, the inner wall of the outer sleeve reducing section is in clearance fit with the outer wall of the central sleeve, the outer sleeve reducing section is provided with an upper outer sleeve sealing groove and a lower outer sleeve sealing groove, and outer sleeve sealing rings are respectively embedded in the two outer sleeve sealing grooves to realize sealing with the outer wall of the central sleeve; the inner walls of the upper bearing cover and the lower bearing cover are respectively sealed with the outer wall of the central sleeve through the inner bearing cover sealing ring, and the outer walls of the upper bearing cover and the lower bearing cover are respectively sealed with the inner wall of the rotary outer sleeve through the outer bearing cover sealing ring. The outer sleeve reducing section and the outer sleeve sealing ring divide the inner cavity of the rotary outer sleeve into an upper bearing cavity and a lower bearing cavity which are mutually independent and sealed, so that independent lubrication can be realized, the seal of one bearing cavity is damaged, the lubrication of the other bearing cannot be damaged, and the cost of accessories is reduced.

As a further improvement of the utility model, the upper part of the rotating outer sleeve is provided with an upper oil injection hole communicated with the upper bearing cavity, and the outer port of the upper oil injection hole is screwed with an upper oil nozzle; the middle section of the rotary outer sleeve is provided with a lower oil injection hole communicated with the lower bearing cavity, and the outer port of the lower oil injection hole is screwed with a lower oil nozzle. Lubricating oil can be injected into the upper bearing cavity of the rotary outer sleeve through the upper oil nozzle and the upper oil injection hole to lubricate the upper bearing; lubricating oil can be injected into the lower bearing cavity of the rotary outer sleeve through the lower oil nozzle and the lower oil injection hole to lubricate the lower bearing.

As a further improvement of the present invention, the axis of the hyperbolic elbow bends 90 degrees radially outward in the vertical plane and then 90 degrees in the horizontal plane. The eccentric horizontal tangential nozzle is formed by a 90-degree elbow in a vertical plane and then a 90-degree elbow in a horizontal plane.

Drawings

The invention will be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.

Fig. 1 is a front view of the rotary mud gun of the present invention in a locked state.

Fig. 2 is a left side view of fig. 1.

Fig. 3 is an enlarged top view of fig. 1.

Fig. 4 is a perspective view of the sprinkler head of fig. 1.

Fig. 5 is a front view of the center sleeve of fig. 1.

Fig. 6 is a front view of the swivel housing of fig. 1.

Fig. 7 is a cross-sectional view taken along a-a in fig. 6.

Fig. 8 is a cross-sectional view taken along line B-B of fig. 6.

Fig. 9 is a schematic structural view of the joystick of fig. 1.

Fig. 10 is a top view of the upper band of fig. 1.

Fig. 11 is a top view of the lower clip of fig. 1.

Fig. 12 is a front view of the rotary mud gun of the present invention in an adjusted state.

Fig. 13 is a front view of the rotary mud gun of the present invention in a rotating state.

Fig. 14 is a right side view of fig. 13.

In the figure: 1. a mud gun standpipe; 2. a central sleeve; 3. rotating the outer sleeve; 3a, rotating the outer sleeve flange; 3b, rotating the positioning hole of the outer sleeve; 3c. an upper bearing cavity; 3d, an upper oil injection hole; 3e, an outer sleeve reducing section; 3f, sheathing a sealing groove; 3g, sleeving a sealing ring; 3h, a lower bearing cavity; 3j, a bottom injection oil hole; 4. an upper bearing; 4a. an upper bearing cap; 4b, an oil feeding nozzle; 5. a lower bearing; 5a, a lower bearing cover; 5b, a lower oil nozzle; 6. locking the nut; 7. a joystick; 7a, operating lever boss; 7b, a rotation stopping bolt; 7c, operating lever locking block; 8. a hand wheel; 9. an upper hoop; 9a, an upper clamp support rod; 9b, a circular collar; 10. a spring seat; 11. a spring; 12, a lower hoop; 12a, a lower clamp support rod; a 12 b.C-shaped collar; 13. a spray head; 13a, hyperbolic elbow; horizontal tangential jets 13b.

Detailed Description

As shown in fig. 1 to 11, the rotary mud gun of the present invention comprises a mud gun vertical pipe 1 and a nozzle 13 located at the lower end of the mud gun vertical pipe 1, the lower end of the mud gun vertical pipe 1 is connected with a central sleeve 2 extending downward through a flange, a rotary outer sleeve 3 is sleeved on the periphery of the central sleeve 2, an upper inner step of the rotary outer sleeve 3 is supported below an outer step at the upper part of the central sleeve 2 through an upper bearing 4, and a middle inner step of the rotary outer sleeve 3 is supported on an outer step at the middle part of the central sleeve 2 through a lower bearing 5; a rotary outer sleeve flange 3a is arranged on the periphery of the middle section of the rotary outer sleeve 3, and a plurality of rotary outer sleeve positioning holes 3b which are vertically communicated are uniformly distributed on the circumference of the rotary outer sleeve flange 3 a; the lower port of the rotating outer sleeve 3 is screwed with a spray head 13 through left threads, the lower end of the spray head 13 is provided with a downward and outward extending hyperbolic elbow 13a, and the hyperbolic elbow 13a is provided with a horizontal tangential spray opening 13b which is a distance away from the axis of a vertical pipe of the mud gun.

The axis of the hyperbolic elbow 13a is firstly bent 90 degrees outwards in the radial direction in the vertical plane and then bent 90 degrees in the horizontal plane. First a 90 ° bend in the vertical plane and then a 90 ° bend in the horizontal plane, forming an eccentric horizontal tangential spout 13b.

The mud goes down along the mud gun standpipe 1, enters the spray head 13 through the central sleeve 2, and is finally sprayed out from the horizontal tangential nozzles 13b of the spray head 13. Because horizontal tangential spout 13b and mud gun standpipe axis have a distance, have radius R promptly, when mud was spout from horizontal tangential spout 13b high-speed, produce very big reaction force, this reaction force drive shower nozzle 13 and rotatory overcoat 3 are constantly rotatory around the axis of mud gun standpipe 1, realize the periodic scouring to the tank bottoms, do not leave the dead angle. When the operating lever 7 is inserted into one of the rotating jacket positioning holes 3b, the rotating jacket 3 is forcibly fixed, and the nozzle 13 can be fixed to spray in one direction. A plurality of rotating outer sleeve positioning holes 3b are uniformly distributed along the circumference of the rotating outer sleeve flange 3a, so that the spray head 13 can select a plurality of required spray directions. The product is fast, simple and convenient to operate, and eliminates a plurality of potential safety hazards caused by the fact that workers can only enter the tank to adjust in the conventional device.

An upper bearing 4 is installed above an inner step on the upper portion of the rotating outer sleeve 3, an inner ring of the upper bearing 4 abuts against the lower portion of a first outer step on the upper portion of the central sleeve 2, an upper bearing cover 4a is fixed to an upper port of the rotating outer sleeve 3 through screws, and a flange on the lower end face of the upper bearing cover 4a is pressed above an outer ring of the upper bearing 4.

The lower bearing 5 is installed below the middle inner step of the rotary outer sleeve 3, the inner ring of the lower bearing 5 is abutted to the lower portion of the second outer step of the middle of the central sleeve 2, the lower bearing cover 5a is arranged below the lower bearing 5, the flange of the upper end face of the lower bearing cover 5a is abutted to the lower portion of the inner ring of the lower bearing 5, the lower end face of the lower bearing cover 5a is supported on the locking nut 6, and the locking nut 6 is screwed on the lower portion thread of the central sleeve 2.

The upper bearing cover 4a and the inner step of the rotary outer sleeve 3 are used for axially positioning the upper bearing 4 together, the locking nut 6 is used for axially positioning the lower bearing cover 5a, the lower bearing cover 5a is used for axially positioning the lower bearing 5, and the upper bearing 4 and the lower bearing 5 enable the rotation of the rotary outer sleeve 3 to be more flexible and reduce resistance and abrasion.

The middle section of the rotating outer sleeve 3 is provided with an outer sleeve reducing section 3e to divide the inner cavity of the rotating outer sleeve 3 into an upper bearing cavity 3c and a lower bearing cavity 3h, the inner wall of the outer sleeve reducing section 3e is in clearance fit with the outer wall of the central sleeve 2, the outer sleeve reducing section 3e is provided with an upper outer sleeve sealing groove 3f and a lower outer sleeve sealing groove 3f, and the outer sleeve sealing rings 3g and the outer wall of the central sleeve 2 are embedded in the two outer sleeve sealing grooves 3f to realize sealing respectively. The outer sleeve reducing section 3e and the outer sleeve sealing ring 3g divide the inner cavity of the rotary outer sleeve 3 into an upper bearing cavity 3c and a lower bearing cavity 3h which are independent and sealed, independent lubrication can be realized, the sealing of one bearing cavity is damaged, the lubrication of the other bearing cannot be damaged, and the accessory cost is reduced.

The upper part of the rotating outer sleeve 3 is provided with an upper oil injection hole 3d communicated with the upper bearing cavity 3c, and the outer port of the upper oil injection hole 3d is screwed with an upper oil nozzle 4 b; the middle section of the rotating outer sleeve 3 is provided with a lower oil injection hole 3j communicated with the lower bearing cavity 3h, and the outer port of the lower oil injection hole 3j is screwed with a lower oil nozzle 5b. Lubricating oil can be injected into the upper bearing cavity 3c of the rotating outer sleeve 3 through the upper oil nozzle 4b and the upper oil injection hole 3d to lubricate the upper bearing 4; lubricating oil can be injected into the lower bearing cavity 3h of the rotating outer sleeve 3 through the lower oil nipple 5b and the lower oil injection hole 3j to lubricate the lower bearing 5.

The inner walls of the upper bearing cover 4a and the lower bearing cover 5a are respectively sealed with the outer wall of the central sleeve 2 through the inner sealing ring of the bearing cover, and the outer walls of the upper bearing cover 4a and the lower bearing cover 5a are respectively sealed with the inner wall of the rotating outer sleeve 3 through the outer sealing ring of the bearing cover.

An upper hoop 9 is fixed on the upper part of the vertical pipe 1 of the mud gun, an upper hoop support rod 9a which extends outwards along the radial direction is connected to the outer wall of the upper hoop 9, a circular lantern ring 9b is arranged at the free end of the upper hoop support rod 9a, and the axis of the circular lantern ring 9b is parallel to the axis of the vertical pipe 1 of the mud gun; a lower hoop 12 is fixed at the lower part of the vertical pipe 1 of the mud gun, the outer wall of the lower hoop 12 is connected with a lower hoop support rod 12a which extends outwards along the radial direction, the free end of the lower hoop support rod 12a is provided with a C-shaped lantern ring 12b with an opening at the outer side, and the C-shaped lantern ring 12b and the circular lantern ring 9b are coaxial; the middle section of the operating rod 7 passes through the circular sleeve ring 9b and the C-shaped sleeve ring 12b, and the lower end of the operating rod 7 is provided with a rotation-stopping bolt 7b which can be inserted into a certain rotating outer sleeve positioning hole 3b.

Go up clamp 9 and lower clamp 12 and can adopt two hough concatenations to form, embrace the dress on mud gun standpipe 1 through the bolt fastening, go up the circular lantern ring 9b of clamp 9 and the C shape lantern ring 12b of lower clamp 12 and play the guide effect, be convenient for lift up of control lever 7. When the rotation-stopping latch 7b at the lower end of the operating lever 7 is inserted into a certain rotating jacket positioning hole 3b, the rotating jacket flange 3a and the rotating jacket 3 are forcibly fixed, and the nozzle 13 performs directional flushing. When the operating rod 7 is lifted to enable the rotation stopping bolt 7b at the lower end to be separated from the rotating outer sleeve positioning hole 3b, the reaction force generated when the spray head 13 sprays drives the spray head 13 and the rotating outer sleeve 3 to continuously rotate around the axis of the slurry gun vertical pipe 1, so that the tank bottom is periodically flushed without dead angles.

The middle lower part of the operating rod 7 is provided with an operating rod boss 7a, the lower end face of the operating rod boss 7a is supported above a C-shaped sleeve ring 12b, a spring 11 is supported above the operating rod boss 7a, the spring 11 is sleeved on the periphery of the operating rod, a spring seat 10 is pressed at the upper end of the spring 11, and the top of the spring seat 10 is located below a circular sleeve ring 9b. The spring seat 10 and the lever boss 7a are respectively limited by a circular collar 9b and a C-shaped collar 12b, the spring 11 is compressed between the upper clamp 9 and the lower clamp 12, and the rotation-stopping bolt 7b at the lower end of the lever 7 is kept inserted into the rotation outer sleeve positioning hole 3b by the tension applied to the lever boss 7a by the spring 11 and is not separated due to vibration.

An operating lever locking block 7C which protrudes outwards in the radial direction is arranged below the operating lever boss 7a, the thickness of the operating lever locking block 7C is smaller than the gap width of the C-shaped lantern ring 12b, and a hand wheel 8 is fixed at the top of the operating lever 7.

As shown in fig. 12 to 14, when the lever 7 is manually pulled up against the tension of the spring 11, the lever lock 7C passes through the notch of the C-shaped collar 12b, and after the lever lock 7C reaches the upper side of the C-shaped collar 12b, the lever 7 is rotated by the hand wheel 8, so that the lever lock 7C deviates from the original phase, for example, rotates by 90 °, and at this time, the lever 7 is released, the lever 7 is pushed downward by the tension of the spring 11 until the lever lock 7C is seated on the C-shaped collar 12b, so that the lever 7 can be kept at a high position, and the rotation-stopping pin 7b at the lower end of the lever 7 does not contact with the rotation housing positioning hole 3b, so that the spray head 13 is stabilized in a free rotation state.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention. The undescribed technical features of the present invention can be realized by or using the prior art, and are not described herein again.

Claims (7)

1. The utility model provides a rotatory mud gun, includes mud gun standpipe and the shower nozzle that is located mud gun standpipe lower extreme, its characterized in that: the lower end of the slurry gun vertical pipe is connected with a central sleeve pipe which extends downwards through a flange, a rotary outer sleeve is sleeved on the periphery of the central sleeve pipe, a lower port of the rotary outer sleeve is screwed with the spray head through a left thread, a downward and outward extending hyperbolic elbow is arranged at the lower end of the spray head, and the hyperbolic elbow is provided with a horizontal tangential spray nozzle which is away from the axis of the slurry gun vertical pipe by a certain distance; a rotating outer sleeve flange is arranged on the periphery of the middle section of the rotating outer sleeve, and a plurality of rotating outer sleeve positioning holes which are vertically communicated are uniformly distributed on the circumference of the rotating outer sleeve flange; an upper clamp is fixed on the upper part of the vertical pipe of the mud gun, an upper clamp supporting rod extending outwards in the radial direction is connected to the outer wall of the upper clamp, a circular lantern ring is arranged at the free end of the upper clamp supporting rod, and the axis of the circular lantern ring is parallel to the axis of the vertical pipe of the mud gun; a lower hoop is fixed at the lower part of the vertical pipe of the mud gun, a lower hoop supporting rod extending outwards along the radial direction is connected to the outer wall of the lower hoop, a C-shaped lantern ring with an opening at the outer side is arranged at the free end of the lower hoop supporting rod, and the C-shaped lantern ring and the circular lantern ring share the same axis; the middle section of the operating lever passes through the circular sleeve ring and the C-shaped sleeve ring, and the lower end of the operating lever is provided with a rotation stopping bolt which can be inserted into a positioning hole of a certain rotating outer sleeve.

2. The rotary mud gun of claim 1, wherein: the middle lower part of control rod is equipped with the control rod boss, the lower terminal surface of control rod boss supports C shape lantern ring top, the top of control rod boss supports there is the spring, the spring suit is in the periphery of action bars, and the upper end of spring has pressed the spring holder, the top of spring holder is located the below of circular lantern ring.

3. The rotary mud gun of claim 2, wherein: an operating lever locking block protruding outwards in the radial direction is arranged below the operating lever boss, the cross sections of the operating lever locking blocks in the height direction are the same in shape, the thickness of the operating lever locking block is smaller than the width of the notch of the C-shaped sleeve ring, and a hand wheel is fixed to the top of the operating lever.

4. The rotary mud gun of claim 1, wherein: an upper bearing is arranged above an inner step at the upper part of the rotating outer sleeve, an inner ring of the upper bearing is abutted against the lower part of a first outer step at the upper part of the central sleeve, an upper bearing cover is fixed at an upper port of the rotating outer sleeve through a screw, and a flange at the lower end face of the upper bearing cover is pressed above an outer ring of the upper bearing; the bearing is characterized in that a lower bearing is installed below the inner step in the middle of the rotary outer sleeve, the inner ring of the lower bearing is abutted against the lower portion of the outer step in the middle of the central sleeve, a lower bearing cover is arranged below the lower bearing, a flange on the upper end face of the lower bearing cover is abutted against the lower portion of the inner ring of the lower bearing, the lower end face of the lower bearing cover is supported on a locking nut, and the locking nut is screwed on the lower portion thread of the central sleeve.

5. The rotary mud gun of claim 4, wherein: the middle section of the rotating outer sleeve is provided with an outer sleeve reducing section which divides an inner cavity of the rotating outer sleeve into an upper bearing cavity and a lower bearing cavity, the inner wall of the outer sleeve reducing section is in clearance fit with the outer wall of the central sleeve, the outer sleeve reducing section is provided with an upper outer sleeve sealing groove and a lower outer sleeve sealing groove, and outer sleeve sealing rings are respectively embedded in the two outer sleeve sealing grooves to realize sealing with the outer wall of the central sleeve; the inner walls of the upper bearing cover and the lower bearing cover are respectively sealed with the outer wall of the central sleeve through the inner bearing cover sealing ring, and the outer walls of the upper bearing cover and the lower bearing cover are respectively sealed with the inner wall of the rotary outer sleeve through the outer bearing cover sealing ring.

6. The rotary mud gun of claim 5, wherein: the upper part of the rotating outer sleeve is provided with an upper oil injection hole communicated with the upper bearing cavity, and an outer port of the upper oil injection hole is screwed with an upper oil nozzle; the middle section of the rotary outer sleeve is provided with a lower oil injection hole communicated with the lower bearing cavity, and the outer port of the lower oil injection hole is screwed with a lower oil nozzle.

7. The rotary mud gun according to any one of claims 1 to 6, wherein: the axis of the hyperbolic elbow bends outwards 90 degrees in the vertical plane along the radial direction and then bends 90 degrees in the horizontal plane.

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