CN216110602U

CN216110602U - Mud-rock separation and collection device for well drilling

Info

Publication number: CN216110602U
Application number: CN202122475685.3U
Authority: CN
Inventors: 胡春勇; 黄志伟; 谢守坤; 龙友; 张志强
Original assignee: Gongxian Yijie Environmental Protection Technology Co ltd
Current assignee: Gongxian Yijie Environmental Protection Technology Co ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2022-03-22
Anticipated expiration: 2031-10-14

Abstract

The utility model discloses a mud-rock separating and collecting device for well drilling, which comprises a base, wherein two supports are arranged on the base at intervals, damping mechanisms are arranged on the two supports, a roller screening device is arranged on the two damping mechanisms together, the roller screening device comprises a rotating shaft, the rotating shaft is rotatably arranged on bearings of the two damping mechanisms, a first spiral blade is arranged on the rotating shaft in a surrounding manner, and a first screen cylinder is sleeved on the first spiral blade; around being provided with second helical blade on the outer wall of first sieve section of thick bamboo, the cover is equipped with a second sieve section of thick bamboo on the second helical blade, the one end of a second sieve section of thick bamboo flushes and is connected through the crown plate with a first sieve section of thick bamboo, the sieve mesh of a second sieve section of thick bamboo is littleer than the sieve mesh of a first sieve section of thick bamboo, vibration and detritus combined action have been solved and screen cloth life has greatly been influenced down, drilling workman's intensity of labour and well drilling cost have been increased, still carry harmful substances such as certain mud and crude oil in the detritus after the screening simultaneously, be difficult to the clean scheduling problem of separation.

Description

Mud-rock separation and collection device for well drilling

Technical Field

The utility model relates to the field of drilling mudstone screening, in particular to a mudstone separating and collecting device for drilling.

Background

In the drilling operation of petroleum and natural gas (including geothermal), drilling fluid is required to circulate in a shaft, the rock debris crushed by a drill bit is carried to a wellhead, then the drilling fluid is separated from the rock debris by a separation system such as a vibrating screen, the separated drilling fluid is returned to a mud tank for recycling, and the separated rock debris flows into an open-air waste drilling fluid pool arranged in advance, and is subjected to centralized recovery treatment after subsequent well completion. The existing separation systems all adopt an open type vibrating screen to separate mud and rock debris in a forced vibration mode.

The mode has the advantages that the vibration system brings great noise, the service life of the screen is greatly influenced under the combined action of vibration and rock debris, the labor intensity of drilling workers and the drilling cost are increased, and meanwhile, the rock debris after being screened still carries certain harmful substances such as mud, crude oil and the like and is difficult to separate completely.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a mud-rock separating and collecting device for well drilling, which solves the problems in the background art.

The purpose of the utility model is realized by the following technical scheme: a mud-rock separating and collecting device for well drilling comprises a base, wherein two supports are arranged on the base at intervals, damping mechanisms are arranged on the two supports, and a roller screening device is arranged on the two damping mechanisms together;

the damping mechanism comprises a metal ring and a bearing, the bearing is positioned on the axis of the metal ring, a plurality of stepped holes are arranged on the inner wall of the metal ring along the radial direction in a circumferential array, the stepped holes penetrate through the metal ring, the stepped hole is divided into a large-diameter section and a small-diameter section, a sliding block and a piston rod are arranged in the large-diameter section in a sliding mode, the sliding block is sleeved on the piston rod, the piston rod is connected with the small-diameter section in a sliding manner, one end of the piston rod is arranged in the small-diameter section in a sliding manner, one end of the piston rod extends out of the large-diameter section and is hinged with a connecting rod, the connecting rod is hinged with the outer wall of the bearing, the piston rod is also slidably sleeved with a guide sleeve, the guide sleeve is in threaded connection with the large-diameter section, a first spring is sleeved on a piston rod between the guide sleeve and the sliding block, and a second spring is sleeved on a rod body of the piston rod between the sliding block and the small-diameter section;

the support includes base and fixed plate, the base sets up on the base, metal ring terminal surface both sides all have through bolted connection the fixed plate, first cylindrical cavity has been seted up on the fixed plate, the diameter more than or equal to of first cylindrical cavity the internal diameter of metal ring, the axis of first cylindrical cavity with the axis of metal ring is parallel, the fixed plate bottom with bolted connection is passed through to the base.

Further, cylinder screening plant includes the pivot, the both ends of pivot and two damper's bearing is connected, it is provided with first helical blade to encircle in the pivot, the cover is equipped with a sieve section of thick bamboo on the first helical blade.

Further, it is provided with second helical blade to encircle on the outer wall of a first sieve section of thick bamboo, the cover is equipped with a second sieve section of thick bamboo on the second helical blade, the one end of a second sieve section of thick bamboo with a first sieve section of thick bamboo flushes and connects through the crown plate, the sieve mesh diameter of a second sieve section of thick bamboo is little than the sieve mesh diameter of a first sieve section of thick bamboo.

Furthermore, the length of a second sieve section of thick bamboo is less than the length of a first sieve section of thick bamboo, the cover is equipped with the fender on the outer wall of a second sieve section of thick bamboo one end of keeping away from the crown plate.

The slurry collection device is characterized by further comprising a slurry collection box, the slurry collection box is arranged on the base, a slurry collection hopper is arranged on the slurry collection box and located below the second screen drum, the bottom of the slurry collection box is communicated with a slurry pump through a pipeline, a valve is arranged on the pipeline, and the slurry pump is used for pumping away slurry in the slurry collection box.

Furthermore, a first material collecting hopper is arranged below one end of the ring plate, which is far away from the first screen cylinder, a second material collecting hopper is arranged below one end of the ring plate, which is far away from the second screen cylinder, and a conveying belt is arranged below the first material collecting hopper and the second material collecting hopper.

Furthermore, one end of the first screen cylinder, which is close to the annular plate, is provided with a conical cylinder, and the large-diameter end of the conical cylinder is communicated with the first screen cylinder.

Further, the inside cylindrical cavity of second of having seted up of pivot, the pivot is close to the one end threaded connection of crown plate has rotary joint, rotary joint keeps away from the one end of pivot leads to pipe intercommunication tap, the pole that the pivot cover was equipped with first helical blade runs through on the body and has seted up a plurality of through-holes, and is a plurality of the through-hole with the cylindrical cavity of second intercommunication.

Furthermore, one end, far away from the ring plate, of the rotating shaft is provided with a driven chain disc, the base is provided with a speed reducing motor, an output shaft of the speed reducing motor is provided with a driving chain disc, and the driving chain disc is in transmission connection with the driven chain disc through a chain.

Further, the minor diameter end of a awl section of thick bamboo with annular hole is left to the pivot, be provided with the inlet pipe in the annular hole, the inlet pipe not with a awl section of thick bamboo and pivot contact, the inlet pipe is used for adding the mudstone raw materials in to a sieve section of thick bamboo.

The utility model has the beneficial effects that:

1. when the bearing vibrates, the connecting rods around the bearing drive the piston rod to reciprocate in the large-diameter section and the small-diameter section, the slider reciprocates in the large-diameter section, the first spring or the second spring is continuously compressed when the slider reciprocates, and then the vibration of the bearing is buffered by the elastic force generated by the deformation of the first spring or the second spring respectively, so that the bearing is protected, the effect of shock absorption and protection on the rotating shaft and the whole roller is achieved, and the service life of the equipment is prolonged.

2. The mudstone raw material is separated into harmful substances such as sand grains with large diameter, sand grains with small diameter, mud, crude oil and the like, and the harmful substances are collected in a classified manner, so that the mudstone raw material is further recycled.

3. The second cylindrical cavity is formed in the rotating shaft, a plurality of through holes are formed in the rod body of the rotating shaft, the length of the through holes distributed in the rotating shaft is not more than that of the second screen drum, tap water is filled into the second cylindrical hole and flows out of the through holes to drip washing mud rock raw materials, and then mud attached to large-diameter sand grains and small-diameter sand grains is conveniently separated, so that the mud is conveniently recycled.

Drawings

FIG. 1 is a schematic view of a mud-rock separating and collecting device for well drilling according to the utility model;

FIG. 2 is a schematic view of a shock absorption mechanism of the mud-rock separating and collecting device for well drilling;

FIG. 3 is a sectional view of a metal ring of the mud-rock separating and collecting device for well drilling according to the present invention;

in the figure, 1, a base, 2, a metal ring, 3, a bearing, 4, a large-diameter section, 5, a small-diameter section, 6, a sliding block, 7, a piston rod, 8, a connecting rod, 9, a first spring, 10, a second spring, 11, a base, 12, a fixing plate, 13, a first cylindrical cavity, 14, a rotating shaft, 15, a first spiral blade, 16, a first screen cylinder, 17, a second spiral blade, 18, a second screen cylinder, 19, a ring plate, 20, a mudguard, 21, a slurry collecting box, 22, a slurry collecting hopper, 23, a pipeline, 24, a slurry pump, 25, a valve, 26, a first collecting hopper, 27, a second collecting hopper, 28, a conveying belt, 29, a cone cylinder, 30, a second cylindrical cavity, 31, a rotary joint, 32, a water pipe, 33, a through hole, 34, a driven chain disc, 35, a speed reducing motor, 36, a driving chain disc, 37, a chain, 38, a feeding pipe, 39 and a guide sleeve.

Detailed Description

The technical solutions of the present invention are described in further detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following description, and the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the indicated devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly, e.g., as meaning fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed; the type of the electrical appliance provided by the utility model is only used for reference. For those skilled in the art, different types of electrical appliances with the same function can be replaced according to actual use conditions, and for those skilled in the art, the specific meaning of the above terms in the present invention can be understood in specific situations.

Referring to fig. 1 to 3, the present invention provides a technical solution: as shown in fig. 1, the mud-rock separating and collecting device for well drilling comprises a base 1, wherein two brackets are arranged on the base 1 at intervals, damping mechanisms are arranged on the two brackets, and a roller screening device is arranged on the two damping mechanisms together;

the damping mechanism comprises a metal ring 2 and a bearing 3, the bearing 3 is positioned on the axis of the metal ring 2, a plurality of stepped holes are radially formed in the circumferential array on the inner wall of the metal ring 2, the stepped holes penetrate through the metal ring 2 and are divided into a large-diameter section 4 and a small-diameter section 5, a sliding block 6 and a piston rod 7 are arranged in the large-diameter section 4 in a sliding mode, the sliding block 6 is sleeved on the piston rod 7, the piston rod 7 is connected with the small-diameter section 5 in a sliding mode, one end of the piston rod 7 is arranged in the small-diameter section 5 in a sliding mode, the large-diameter section 4 extends out of one end of the piston rod 7 and is hinged to a connecting rod 8, the connecting rod 8 is hinged to the outer wall of the bearing 3, a guide sleeve 39 is further sleeved on the piston rod 7 in a sliding mode, the guide sleeve 39 is in threaded connection with the large-diameter section 4, a first spring 9 is sleeved on the piston rod 7 between the guide sleeve 39 and the sliding block 6, and a second spring 10 is sleeved on a rod body of the piston rod 7 positioned between the sliding block 6 and the small-diameter section 5;

the support comprises a base 11 and a fixing plate 12, the base 11 is arranged on the base 1, the fixing plate 12 is connected to two sides of the end face of the metal ring 2 through bolts, a first cylindrical cavity 13 is formed in the fixing plate 12, the diameter of the first cylindrical cavity 13 is larger than or equal to the inner diameter of the metal ring 2, the axis of the first cylindrical cavity 13 is parallel to the axis of the metal ring 2, and the bottom of the fixing plate 12 is connected with the base 11 through bolts; as shown in fig. 1-3, in specific implementation, when the drum screening device rotationally screens mud rocks during drilling, rock debris rolls in the drum and impacts the side wall of the drum under the action of gravity, the generated impact is finally applied to the bracket through the rotating shaft 14, and the impact is buffered by additionally arranging damping mechanisms at two ends of the rotating shaft 14, specifically, when the rotating shaft 14 has vertical axial impact force, the rotating shaft 14 is rotatably arranged on the bearings 3 of the two damping mechanisms, and then the rotating shaft 14 drives the bearings 3 to vibrate, the vibration is easily damaged when the bearings 3 are rigidly connected, and further a plurality of connecting rods 8 are circularly hinged on the outer side wall of the bearing 3, one ends of the connecting rods 8, which are far away from the bearings, are respectively hinged with a piston rod 7, the piston rods 7 are slidably arranged in the large-diameter section 4 and the small-diameter section 5 of the metal ring 2, the piston rods 7 are sleeved with sliders 6, and the sliders 6 are slidably arranged in the large-diameter section 4, the spiro union has uide bushing 39 on the empty port of big footpath section 4, the hole has been seted up on the uide bushing 39, piston rod 7 passes the uide bushing, the both ends of slider 6 are provided with first spring 9 and second spring 10 respectively, when bearing 3 vibrates, connecting rod 8 around it drives piston rod 7 at big footpath section 4 and path section 5 reciprocating motion, and then slider 6 reciprocating motion in big footpath section 4, when slider 6 reciprocating motion, the first spring 9 of incessant compression or second spring 10, and then the elasticity that produces through the deformation of first spring 9 or second spring 10 respectively cushions bearing 3's vibration, not only protected bearing 3 to have played shock attenuation protection's effect to bearing 14 and whole cylinder simultaneously, the life of equipment has been prolonged.

The drum screening device comprises a rotating shaft 14, two ends of the rotating shaft 14 are connected with bearings 3 of two damping mechanisms, a first spiral blade 15 is arranged on the rotating shaft 14 in a surrounding mode, and a first screen drum 16 is sleeved on the first spiral blade 15; in specific implementation, after entering the first screen drum 16, the mudstone raw material rolls with the first screen drum 16, and under the action of the first helical blade 15, the mudstone raw material spirally advances in the first screen drum 16 and is continuously screened by the first screen drum 16, the mudstone with a larger diameter is left in the first screen drum 16, and the sand and mud with a smaller diameter pass through the first screen drum 16 and enter the second screen drum 18.

A second spiral blade 17 is arranged on the outer wall of the first screen drum 16 in a surrounding mode, a second screen drum 18 is sleeved on the second spiral blade 17, one end of the second screen drum 18 is flush with the first screen drum 16 and is connected with the first screen drum 16 through an annular plate 19, and screen holes of the second screen drum 18 are smaller than screen holes of the first screen drum 16; in particular, as shown in fig. 1, after the rock sand and the slurry with smaller diameter pass through the first screen drum 16 and enter the second screen drum 18, the second spiral blade 17 spirals forward, and the slurry passes through the second screen drum 18 during the tumbling process, so that the slurry is separated from the sand with smaller diameter.

The length of the second screen drum 18 is less than that of the first screen drum 16, and a mudguard 20 is sleeved on the outer wall of one end, far away from the ring plate 19, of the second screen drum 18; in order to collect the separated large-diameter sand grains and small-diameter sand grains, the length of the second screen drum 18 is longer than that of the first screen drum 16, and the discharge ports of the large-diameter sand grains and the small-diameter sand grains are inconsistent, so that the large-diameter sand grains and the small-diameter sand grains are convenient to sort, collect and utilize.

The mud collection box 21 is arranged on the base 1, a mud collection hopper 22 is arranged on the mud collection box 21, the mud collection hopper 22 is positioned below the second screen drum 18, the bottom of the mud collection box 21 is communicated with a mud pump 24 through a pipeline 23, a valve 25 is arranged on the pipeline 23, and the mud pump 24 is used for pumping away mud in the mud collection box 21; as shown in fig. 1, in the specific implementation, after the slurry is separated from the second screen cylinder 18, the slurry falls into the slurry collection box 21 under the action of gravity, and the slurry falls in a parabola shape because the second screen cylinder 18 rotates, and the slurry collection box 21 is provided with the slurry collection hopper 22, so that the thrown-off slurry can be collected more conveniently.

A first material collecting hopper 26 is arranged below one end of the first screen drum 16, which is far away from the annular plate 19, a second material collecting hopper 27 is arranged below one end of the second screen drum 18, which is far away from the annular plate 19, and a conveying belt 28 is arranged below the first material collecting hopper 26 and the second material collecting hopper 27; in specific implementation, as shown in fig. 1, the large-diameter sand grains and the small-diameter sand grains separated from the first screen drum 16 and the second screen drum 18 enter the first collecting hopper 26 and the second collecting hopper 27 respectively, the conveying belts 28 are arranged below the first collecting hopper 26 and the second collecting hopper 27, the large-diameter sand grains and the small-diameter sand grains collected by the first collecting hopper 26 and the second collecting hopper 27 are collected into two lines on the surface of the conveying belts 28 respectively, so that two different sand grains can be run by using one conveying belt 28, and the sand grains with different diameters can have different uses, such as road repair, landfill and the like.

One end of the first screen drum 16 close to the annular plate 19 is provided with a conical drum 29, and the large-diameter end of the conical drum 29 is communicated with the first screen drum 16;

an annular hole is reserved between the small-diameter end of the conical cylinder 29 and the rotating shaft 14, a feeding pipe 38 is arranged in the annular hole, the feeding pipe 38 is not in contact with the conical cylinder 29 and the rotating shaft 14, and the feeding pipe 38 is used for adding a mudstone raw material into the first screen cylinder 16; as shown in fig. 1, in practical implementation, a conical cylinder 29 is disposed at an end of the first screen cylinder 16 away from the first collecting hopper 26, and the conical cylinder 29 can facilitate adding the mudstone raw material into the first screen cylinder 16 to prevent the mudstone raw material from overflowing.

A second cylindrical cavity 30 is formed in the rotating shaft 14, a rotating joint 31 is connected to one end, close to the annular plate 19, of the rotating shaft 14 in a threaded mode, one end, far away from the rotating shaft 14, of the rotating joint 31 is communicated with a faucet through a water pipe 32, a plurality of through holes 33 penetrate through the shaft body, sleeved with the first spiral blades 15, of the rotating shaft 14, and the plurality of through holes 33 are communicated with the second cylindrical cavity 30; as shown in fig. 1-3, in specific implementation, a second cylindrical cavity 30 is opened inside the rotating shaft 14, a plurality of through holes 33 are formed in a shaft body of the rotating shaft 14, the length of the plurality of through holes 33 distributed on the rotating shaft 14 is not more than the length of the second screen drum 18, tap water is filled into the second cylindrical hole 30, and flows out from the plurality of through holes 33 to wash the mudstone raw material, so that mud attached to large-diameter sand grains and small-diameter sand grains can be separated conveniently, and the mud can be recycled.

A driven chain disc 34 is arranged at one end, far away from the ring plate 19, of the rotating shaft 14, a speed reducing motor 35 is arranged on the base 1, a driving chain disc 36 is arranged on an output shaft of the speed reducing motor 35, and the driving chain disc 36 is in transmission connection with the driven chain disc 34 through a chain 37; as shown in fig. 1, in practical implementation, the speed reduction motor 35 is driven to act on the driving chain disc 36 to rotate at a low speed, the driving chain disc 36 drives the driven chain disc 34 to rotate through a chain, the driven chain disc 34 drives the rotating shaft 14 to rotate, and then the whole drum screening device is driven to rotate, so that the mudstone raw material spirally advances in the drum and is screened.

The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the utility model is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The mud-rock separating and collecting device for well drilling is characterized by comprising a base (1), wherein two supports are arranged on the base (1) at intervals, damping mechanisms are arranged on the two supports, and a roller screening device is arranged on the two damping mechanisms together;

the damping mechanism comprises a metal ring (2) and a bearing (3), the bearing (3) is positioned on the axis of the metal ring (2), a plurality of stepped holes are radially formed in the inner wall of the metal ring (2) in a circumferential array mode and penetrate through the metal ring (2), the stepped holes are divided into a large-diameter section (4) and a small-diameter section (5), a sliding block (6) and a piston rod (7) are arranged in the large-diameter section (4) in a sliding mode, the sliding block (6) is sleeved on the piston rod (7), the piston rod (7) is connected with the small-diameter section (5) in a sliding mode, one end of the piston rod (7) is arranged in the small-diameter section (5) in a sliding mode, one end of the piston rod (7) extends out of the large-diameter section (4) and is hinged to a connecting rod (8), the connecting rod (8) is hinged to the outer wall of the bearing (3), and a guide sleeve (39) is further sleeved on the piston rod (7) in a sliding mode, the guide sleeve (39) is in threaded connection with the large-diameter section (4), a first spring (9) is sleeved on a piston rod (7) between the guide sleeve (39) and the sliding block (6), and a second spring (10) is sleeved on a rod body of the piston rod (7) between the sliding block (6) and the small-diameter section (5);

the support includes base (11) and fixed plate (12), base (11) set up on base (1), becket (2) terminal surface both sides all have through bolted connection fixed plate (12), first cylindrical cavity (13) have been seted up on fixed plate (12), the diameter more than or equal to of first cylindrical cavity (13) the internal diameter of becket (2), the axis of first cylindrical cavity (13) with the axis of becket (2) is parallel, fixed plate (12) bottom with base (11) pass through bolted connection.

2. The mud-rock separating and collecting device for drilling well as recited in claim 1, characterized in that said drum screen device comprises a rotating shaft (14), both ends of said rotating shaft (14) are connected with two bearings (3) of said damping mechanism, a first helical blade (15) is arranged on said rotating shaft (14) in a surrounding manner, and a first screen cylinder (16) is sleeved on said first helical blade (15).

3. A mud-rock separating and collecting device for well drilling as defined by claim 2, characterized in that a second helical blade (17) is arranged around the outer wall of the first screen cylinder (16), a second screen cylinder (18) is sleeved on the second helical blade (17), one end of the second screen cylinder (18) is flush with the first screen cylinder (16) and is connected with the first screen cylinder (16) through an annular plate (19), and the mesh diameter of the second screen cylinder (18) is smaller than that of the first screen cylinder (16).

4. A mud-rock separating and collecting device for well drilling as defined in claim 3, characterized in that the length of the second screen cylinder (18) is less than that of the first screen cylinder (16), and the outer wall of the second screen cylinder (18) at the end far away from the ring plate (19) is provided with a mud guard (20).

5. The mud-rock separating and collecting device for drilling well as defined in claim 4, further comprising a mud collecting box (21), wherein the mud collecting box (21) is disposed on the base (1), a mud collecting hopper (22) is disposed on the mud collecting box (21), the mud collecting hopper (22) is located below the second screen cylinder (18), the bottom of the mud collecting box (21) is communicated with a pipe (23) through a pipe (24), a valve (25) is disposed on the pipe (23), and the mud pump (24) is used for pumping away mud in the mud collecting box (21).

6. A mud-rock separating and collecting device for drilling well as recited in claim 5, characterized in that a first collecting hopper (26) is arranged under the end of the first screen cylinder (16) far away from the ring plate (19), a second collecting hopper (27) is arranged under the end of the second screen cylinder (18) far away from the ring plate (19), and a conveying belt (28) is arranged under the first collecting hopper (26) and the second collecting hopper (27).

7. A mud-rock separating and collecting device for drilling well as recited in claim 6, characterized in that the end of the first screen cylinder (16) near the ring plate (19) is provided with a cone cylinder (29), and the large diameter end of the cone cylinder (29) is communicated with the first screen cylinder (16).

8. A mud-rock separating and collecting device for drilling as claimed in claim 3, wherein a second cylindrical cavity (30) is opened in the rotating shaft (14), a rotary joint (31) is connected to one end of the rotating shaft (14) close to the annular plate (19) in a threaded manner, one end of the rotary joint (31) far away from the rotating shaft (14) is communicated with a water tap through a water pipe (32), a plurality of through holes (33) are opened in the shaft body of the rotating shaft (14) on which the first helical blade (15) is sleeved, and the plurality of through holes (33) are communicated with the second cylindrical cavity (30).

9. A mud-rock separating and collecting device for drilling well as defined in claim 8, characterized in that the end of the rotating shaft (14) far away from the annular plate (19) is provided with a driven chain disc (34), the base (1) is provided with a speed reducing motor (35), the output shaft of the speed reducing motor (35) is provided with a driving chain disc (36), and the driving chain disc (36) is in transmission connection with the driven chain disc (34) through a chain (37).

10. A mud-rock separating and collecting device for drilling well as recited in claim 7, characterized in that the small diameter end of the conical cylinder (29) and the rotary shaft (14) are provided with an annular hole, a feed pipe (38) is arranged in the annular hole, the feed pipe (38) is not in contact with the conical cylinder (29) and the rotary shaft (14), and the feed pipe (38) is used for adding mud-rock raw materials into the first screen cylinder (16).