CN214170495U - Safe and environment-friendly device for punching, trepanning, grinding and washing construction - Google Patents

Abstract

The utility model relates to a be used for oil field workover construction equipment, concretely relates to dash cover brill to grind and wash construction safety ring device. The device comprises a flushing control valve and a flushing balance valve; the flush control valve includes: the control shell, the rotating shaft, the pressing threaded sleeve and the short circuit are connected; the control shell is respectively connected with the short circuit and the compression screw sleeve; the flush trim valve includes: the device comprises a connecting joint, a blocking pressure pipe, a balance working barrel, an inner sleeve, a ball rod, a spring, a gasket, an adjusting nut and a backstop pin; the lower part of the connecting joint is connected with the balance working barrel, and the middle part of the connecting joint is connected with the bottom of the blocking pressure pipe; the ball arm penetrates into the inner sleeve, and the spring and the gasket are sleeved on the upper part and the lower part of the ball arm respectively; the bottom end of the ball rod is connected with an adjusting nut and a backstop pin. The utility model provides an environmental pollution, the tubular column of washing-out drill mill among the process block up the engineering quality accident, the troublesome poeration scheduling problem that cause, eliminated tubular column and liquid and scurry the well control accident risk that causes, avoided the process to rework, improved the efficiency of construction.

Description

Safe and environment-friendly device for punching, trepanning, grinding and washing construction

Technical Field

The utility model relates to a be used for oil field workover construction equipment, concretely relates to dash cover brill to grind and wash construction safety ring device.

Background

Because the construction pipe columns of sand washing, casing milling, drilling and plugging, milling and washing are communicated in a non-control mode, the pressure difference of oil and a sleeve is unbalanced due to dirt and the like washed in the casing drill washing and washing construction, and when a single pipe column of a deepened casing drill washing and grinding is replaced, liquid of the pipe column in the well overflows and the liquid of the single pipe column of the casing drill washing and grinding leaks, so that the problems of serious environment pollution of a construction wellhead, pipe column blockage, drill sticking accidents and the like are caused; when the blowout warning sign appears to the wellhead of the lost circulation zone or the high-pressure oil-gas zone, the flushing drill is connected with the plug valve between the upper part of the single pipe column and the water faucet, and before the flushing drill is used for flushing a single pipe without entering the well, the plug valve cannot be normally closed due to the height of the plug valve, so that the serious safety and well control risk exist.

The chinese invention patent CN104929558B discloses a fixed point sleeve-taking and replacing process method, which comprises the following steps: 1) a bridge plug is put in and a leak-off point of an oil layer casing in a shaft is confirmed; 2) milling an oil sleeve annulus, suspending a sleeve milling pipe column, putting a double packer in, and fishing an oil sleeve back-off operation at a wellhead; 3) the sleeve-changing opposite-buckling pressure test is qualified; 4) pulling out the sleeve milling pipe column; 5) fishing out the double packer pipe column, drilling the plug, flushing sand, fishing the bridge plug, dredging the well and completing the well. The process method of the invention can eliminate the risk of losing the fish, ensure the depth of the top of the fish in the specified range during sleeve changing, and completely ensure the sealing after sleeve changing. According to the invention, the oil layer casing is clamped by the descending double packer pipe column and bears the reactive torque, so that the situation that the casing below the fixed-point sleeve is taken cannot be broken when the oil layer casing is broken out is ensured, and the breaking out is carried out above the upper slip packer.

The utility model discloses a chinese utility model patent CN201420520 discloses a high-efficient sedimentation cup that sand washing, bore stopper were used during oil field workover, it comprises shaft bottom instruments (5) such as drilling rod or oil pipe coupling (1), sedimentation cup urceolus (2), hourglass sand hole (3), oil pipe nipple joint (4), mill shoe, cover mill section of thick bamboo, scraper, its characterized in that: a plurality of sand leakage holes (3) are added on the outer cylinder (2) of the sedimentation cup. When the high-efficiency sedimentation cup is put in a well, the high-efficiency sedimentation cup is connected to the upper part of a well bottom tool (5) such as a grinding shoe, a milling sleeve, a scraper and the like, well bottom dirt is flushed up through positive circulation and is moved upwards in the hollow space of an oil jacket, when a single joint is connected, internal organs in the hollow space fall due to pump stopping, small particles such as sand grains and the like fall into the sedimentation cup along with high-density large particles, but the small particles such as the sand grains and the like leak out through a sand leakage hole (3), only the high-density large particles are left in the sedimentation cup, and the small particles such as the sand grains and the like are finally carried to the ground by well washing liquid, so that a sand flushing (drilling and plugging) task is completed.

Chinese utility model patent CN203604859U discloses a pipe connection protector, include: the steel wire rope fixing device comprises a clamp (1), a fixing bolt (2), a U-shaped hook (3), a shaft (4) and a steel wire rope sleeve (5). A clamp (1) is a rectangular flat plate, the middle of the rectangular flat plate is pressed into a semicircle, four corners are cut, each corner is provided with a through hole, two sides of the rectangular flat plate are of a plane structure, a through hole is formed in the middle of one side of the rectangular flat plate, two halves of clamps (1) are used oppositely and connected through a fixing bolt (2), a shaft (4) penetrates through the middle through hole in the edge of each clamp (1) to connect a U-shaped hook (3) with the clamp (1), and a steel wire rope sleeve (5) penetrates through the U-shaped hook (3) to connect the two clamps (1). The device is suitable for oil field oil, well washing of water well, and high pressure hose and steel pipe line connection protection in the operation processes such as sand washing, grinding, cover mill in the operation avoid the well-flushing liquid to leak, and the energy saving avoids polluting the environment, prevents that high pressure hose from taking off and hurting people, guarantees oil field safety in production.

The existing device still hardly eliminates the risk of well control accidents caused by upward fleeing of a pipe column and liquid in sand washing, casing milling, plug drilling, milling and flushing construction, and the construction efficiency needs to be further improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a dash cover and bore mill and wash construction safety ring device, the device has effectively solved and has dashed cover and bore mill and wash environmental pollution, engineering quality accident scheduling problem in the construction, has eliminated the well control accident risk that scurries on tubular column and the liquid and cause, has avoided the process to do over again, has improved the efficiency of construction.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the invention provides a safe and environment-friendly device for abrasion washing construction of a punching drill, which comprises a washing control valve and a washing balance valve; the flush control valve includes: the control shell, the rotating shaft, the pressing threaded sleeve and the short circuit are connected; the control shell is respectively connected with the short circuit and the pressing threaded sleeve.

The flush trim valve includes: the device comprises a connecting joint, a blocking pressure pipe, a balance working barrel, an inner sleeve, a ball rod, a spring, a gasket, an adjusting nut and a backstop pin; the lower part of the connecting joint is connected with the balance working barrel, and the middle part of the connecting joint is connected with the bottom of the blocking pressure pipe; the ball arm penetrates into the inner sleeve, and the spring and the gasket are sleeved on the upper part and the lower part of the ball arm respectively; the bottom end of the ball rod is connected with an adjusting nut and a backstop pin.

Furthermore, the upper part and the lower part of the control shell are both sealed internal threads, and a boss, an inner cavity and a flat internal thread are arranged between the upper sealed internal thread and the lower sealed internal thread from bottom to top; a transverse through hole is formed in the side face of the middle of the inner cavity, and a valve seat, a valve body and a valve seat are sequentially installed in the inner cavity, wherein the valve body is positioned in the middle of the inner cavity and corresponds to the rotating shaft and the transverse through hole, and the opening and closing of the flushing control valve are realized through the direction conversion of the transverse through hole, so that the functions of controlling the flushing drill to perform the functions of flushing single tubular column liquid drainage and well tubular column blowout prevention are realized; and the valve seats are all provided with sealing packing.

Furthermore, the upper part and the lower part of the compression screw sleeve are respectively provided with an inner hole, the shapes of the inner holes are respectively hexagonal and circular, and the outer wall of the compression screw sleeve is a balanced type external thread and is connected with the control shell through the balanced type external thread.

Furthermore, the pressing threaded sleeve and the rotating shaft are both provided with sealing packing.

Furthermore, the upper part and the lower part of the connecting joint are both sealed internal threads, and the middle part of the inner side of the connecting joint is a flat internal thread with the inner diameter smaller than that of the sealed internal threads; the upper part and the lower part of the balance working barrel are both provided with sealing external threads, the sealing external threads on the upper part of the balance working barrel are connected with the connecting joint, and the lower part of the balance working barrel is connected with the pipe column in the well; the inner cavity of the middle part of the balance working barrel is provided with a boss, and the upper part of the boss is provided with an inner sleeve.

Furthermore, two rows of transverse through holes are longitudinally formed in the side face of the upper middle part of the inner sleeve, the number of the through holes in each row is 4, the through holes are arranged in a circumferential array, the upper through holes are oblate, the lower through holes are communicated with the bottom, and the inner sleeve is in a tooth shape with a middle hole when viewed from top. The lower part of the inner sleeve is in a tooth shape, the overflowing area is large, the pressure difference of the pipe column is balanced through the upper spring and the lower spring, and the throttling function when the sleeve flushing drill is replaced to rub and wash a single pipe column and the lower pipe column and the normal flowing function of liquid flow when the sleeve flushing drill is rubbed and washed are achieved through different position states of the ball rod in the inner sleeve. Furthermore, the upper part of the blocking pressure pipe is conical, a transverse through hole is arranged below the conical pressing pipe, and the bottom of the blocking pressure pipe is provided with a flat external thread which is connected with a flat internal thread in the middle of the connecting joint.

Furthermore, the ball rod consists of a sealing ball and a rod with a flat thread and a backstop pin hole at the lower part.

Furthermore, during the flushing and casing drilling and grinding construction, one end of the flushing control valve short joint is connected with the control shell, and the other end of the flushing control valve short joint is connected with the flushing balance valve through a pipe column or a short joint; when the flushing drill is used for grinding and washing construction, the short circuit of the flushing control valve is connected with the flushing balance valve through the pipe column or the short circuit, and the effect of facilitating the pipe column to move upwards when the hydraulic power tongs are disconnected and well control risks occur is achieved.

Furthermore, during the flushing drill grinding and washing construction, the flushing control valve short circuit is connected with the connecting joint of the flushing balance valve through the pipe column or the short circuit, after the connection, the blocking pressure pipe of the flushing balance valve is positioned in the pipe column or the short circuit between the flushing control valve, dirt settlement is prevented when the flushing drill grinding and washing single pipe column is replaced, and the effect of blocking the inner sleeve circulation channel and pressing the inner sleeve is achieved.

Compared with the prior art, the utility model discloses following beneficial effect has. A dash cover and bore to grind and wash construction safety ring protection device has solved the environmental pollution of dashing the cover and bore among the process of washing, engineering quality accident, the troublesome poeration scheduling problem that the tubular column blockked up and causes, has eliminated and has scurried the well control accident risk that causes on tubular column and the liquid, has avoided the process to do over again, has improved the efficiency of construction.

Drawings

Fig. 1 is a schematic structural view of the safety and environmental protection device for flushing, drilling, grinding and washing construction according to an embodiment of the present invention.

The ball valve comprises a shell 1, a valve seat 2, a valve body 3, a rotating shaft 4, a compression screw sleeve 5, a short joint 6, a connecting joint 7, a blocking pressing pipe 8, a balance working barrel 9, an inner sleeve 10, a ball rod 11, a spring 12, a gasket 13, an adjusting nut 14 and a retaining pin 15.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, and/or combinations thereof, unless the context clearly indicates otherwise.

In order to make the technical solutions of the present invention more clearly understood by those skilled in the art, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.

Example 1

As shown in fig. 1, the safe and environment-friendly device for the flushing and casing drilling grinding and cleaning construction comprises a flushing control valve and a flushing balance valve; the flushing control valve consists of a control shell (1), a valve seat (2), a valve body (3), a rotating shaft (4), a pressing threaded sleeve (5) and a short joint (6); the flushing balance valve consists of a connecting joint (7), a blocking pressure pipe (8), a balance working barrel (9), an inner sleeve (10), a ball rod (11), a spring (12), a gasket (13), an adjusting nut (14) and a backstop pin (15).

The upper part and the lower part of a control shell (1) of the flushing control valve are both provided with sealed internal threads, the upper part of the control shell is connected with a sealed external thread at the bottom of a single tubular column which is washed by a flushing sleeve drill, the lower part of the control shell is connected with a sealed external thread at the upper part of a short joint (6), a lug boss, an inner cavity and a flat internal thread are arranged between the sealed internal threads from bottom to top, the side surface of the middle part of the inner cavity is provided with a transverse through hole, a valve seat (2), a valve body (3) and a valve seat (2) are sequentially arranged in the inner cavity, wherein the valve body (3) is positioned in the middle of the inner cavity and corresponds to the rotating shaft (4) and the transverse through hole, the switch of the flushing control valve is realized through the direction conversion of the transverse through hole, the upper inner hole and the lower inner hole of the pressing threaded sleeve (5) are respectively hexagonal and circular, the outer wall is a flat external thread, and the flat internal thread of the control shell (1) is connected with the flat internal thread of the control shell, the valve seat (2) and the valve body (3) are fixed, and the compression screw sleeve (5), the valve seat (2) and the rotating shaft (4) are all provided with sealing packing.

The upper part and the lower part of a connecting joint (7) of the flushing balance valve are both sealed internal threads, the middle part of the inner side of the flushing balance valve is a flat internal thread with the inner diameter smaller than the sealed internal threads, and the lower part of the flushing balance valve is connected with a sealed external thread on the upper part of a balance working barrel (9); the lower part of the balance working barrel (9) is provided with a sealing external thread and is connected with an in-well pipe column, a boss is arranged in the middle inner cavity, and an inner sleeve (10) is arranged at the upper part of the boss; two rows of transverse through holes are longitudinally formed in the side face of the middle upper part of the inner sleeve (10), the number of the through holes is 4, the through holes are arranged in a circumferential array, the upper through holes are oblate, the lower through holes are communicated with the bottom, and the side of the through holes is in a tooth shape with a central hole; the upper part of the blocking pressure pipe (8) is conical, a transverse through hole is arranged below the conical shape, and the bottom of the blocking pressure pipe is provided with a flat external thread which is connected with a flat internal thread in the middle of the connecting joint (7); the ball rod (11) consists of a sealing ball and a rod with a flat thread and a backstop pin hole at the lower part; after the spring (12) and the gasket (13) are sequentially connected in series from the bottom end of the ball rod (11), the spring and the gasket are connected in series from an inner cavity at the upper part of the inner sleeve (10) and a middle hole at the bottom part of the inner sleeve, then the other set of the spring (12) and the gasket (13) are sequentially connected in series from the bottom end of the ball rod (11), and finally the adjusting nut (14) is screwed in from the bottom end of the ball rod (11) and is stopped by the stopping pin (15).

The flushing control valve is switched on and off by rotating the rotating shaft (4) through a special wrench, and the effects of controlling the flushing drill to grind and wash liquid of a single pipe column to drain and preventing the pipe column in the well from spraying are achieved.

When the flushing drill is used for grinding and washing construction, one end of a flushing control valve short joint (6) is connected with the control shell (1), and the other end of the flushing control valve short joint is connected with a flushing balance valve through a pipe column or a short joint; when the flushing drill is used for grinding and washing construction, the short circuit (6) of the flushing control valve is connected with the flushing balance valve through a pipe column or the short circuit, so that the hydraulic power tong is convenient to break out and the pipe column is convenient to jump up when well control risks occur.

When the flushing drill is used for grinding and washing construction, the flushing control valve short circuit (6) is connected with the connecting joint (7) of the flushing balance valve through a pipe column or a short circuit, after connection, the blocking pressure pipe (8) of the flushing balance valve is located in the pipe column or the short circuit between the flushing control valve, dirt settlement is prevented when the flushing drill is used for grinding and washing a single pipe column, and the effect of blocking and pressing the inner sleeve is caused on a circulation channel of the inner sleeve (10).

Two rows of transverse through holes are longitudinally formed in the side face of the middle upper part of the inner sleeve (10), the number of the through holes in each row is 4, the through holes are arranged in a circumferential array, the upper through holes are oblate, the lower through holes are communicated with the bottom, and the inner sleeve is in a tooth shape with a middle hole when viewed from top (see A-A). The lower part of the inner sleeve (10) is toothed, the overflowing area is large, the pipe column pressure difference is balanced through the upper spring (12) and the lower spring (12), and the throttling function when a single pipe column and a lower pipe column are abraded and washed by the sleeve flushing drill and the normal flowing function of liquid flow during the abrasion and washing construction of the sleeve flushing drill are achieved through different positions of the ball rod (11) on the inner sleeve (10).

Example 2

The use method of the safety and environment-friendly device for the flushing, drilling, grinding and washing construction in the embodiment 1 comprises the following steps: connecting a flushing balance valve to a downhole pipe column (or taking out 2 pipe columns after a lower sleeve drill grinding and washing pipe column is blocked) with the expected depth close to the blocking depth, connecting the flushing balance valve to the lower part of a second pipe column, putting the pipe columns into a well, normally putting the pipe columns, performing the grinding and washing construction of the sleeve drill and replacing the sleeve drill grinding and washing a single pipe column, wherein the flushing balance valve plays a role in balancing the pressure difference in the well, well pipe columns are not overflowed under the actions of a ball rod, a spring and a blocking pressure pipe to cause environmental pollution, even a small amount of dirt is settled when replacing a single pipe column ground and washed by the sleeve drill, the dirt is settled in an annular space between the blocking pressure pipe and the pipe column, the pipe columns and tools are not blocked due to the settlement of the dirt, engineering and quality accidents are avoided, the maintenance of the flushing balance valve only needs to remove the blocking pressure pipe, and the inner sleeve, the ball rod, the spring, the gasket, the adjusting nut and the backstop pin can be taken out from a balance working barrel, the maintenance is simple.

Connecting a flushing control valve to the lower part of a first pipe column after the lower pipe column is blocked in an opening state, taking the lower part of the first pipe column as a flushing drill to grind and wash a single pipe, operating a hydraulic power tong to enable the lower part of the hydraulic power tong to be in short circuit connection with the underground pipe column, lifting the flushing drill to grind and wash the single pipe column after the flushing drill grinds and washes the single pipe column and washes the well according to a specified time, closing a flushing control valve, operating the hydraulic power tong to break out a buckle and replace a deepened pipe column under the action of the flushing control valve, connecting the flushing drill to grind and wash the single pipe column with the underground pipe column, opening the flushing control valve, continuing flushing drill grinding and washing construction, and repeating the operations until the flushing drill is ground and washed to the bottom of a manual well or the designed depth; washing, change the bush-flushing drill and grind and wash single tubular column or normally go down the tubular column in-process, tubular column in the well is at the balanced valve and block under the effect of pressing the pipe, and well liquid can not be excessive, causes environmental pollution, and tubular column, instrument can not block up, cause engineering, quality accident.

Under the action of the control valve, the single pipe column for the abrasive cleaning of the sleeve flushing drill has no liquid leakage phenomenon, and meanwhile, if a blowout precursor appears in the well, the single pipe column for the abrasive cleaning of the sleeve flushing drill can be lifted in time to enable a control shell of the flushing control valve to be higher than the upper plane of a blowout preventer of the well mouth, namely, a short circuit at the lower part is positioned below a half-sealed flashboard of the blowout preventer, and the half-sealed flashboard of the blowout preventer and a switch of the flushing control valve are quickly closed, so that the well can be effectively closed in time, and the environmental pollution of the abrasive cleaning construction of the sleeve flushing drill and the well control safety risk caused by the upward movement of the pipe column and liquid are eliminated; in the flushing and casing drilling and grinding construction, the flushing balance valve and the flushing control valve can be connected and disconnected by using a hydraulic power tong for construction in a matched manner, so that the construction is facilitated, the well control accident risk caused by low connecting speed of a pipe column and a tool and the engineering and quality accidents caused by pipe column blockage due to dirt settlement are reduced, and the construction efficiency is improved.

The utility model discloses well spare part that does not expand the discussion itself, each spare part connected mode in this application all belong to this technical field's well-known technique, no longer give unnecessary details. Such as welding, threaded connections, etc.

In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

Claims (10)

1. A safe and environment-friendly device for the abrasion washing construction of a punching sleeve drill is characterized by comprising a washing control valve and a washing balance valve;

the flush control valve includes: the control shell, the rotating shaft, the pressing threaded sleeve and the short circuit are connected; the control shell is respectively connected with the short circuit and the compression screw sleeve;

the flush trim valve includes: the device comprises a connecting joint, a blocking pressure pipe, a balance working barrel, an inner sleeve, a ball rod, a spring, a gasket, an adjusting nut and a backstop pin; the lower part of the connecting joint is connected with the balance working barrel, and the middle part of the connecting joint is connected with the bottom of the blocking pressure pipe; the ball arm penetrates into the inner sleeve, and the spring and the gasket are sleeved on the upper part and the lower part of the ball arm respectively; the bottom end of the ball rod is connected with an adjusting nut and a backstop pin.

2. The safe and environment-friendly device for the washout construction of the sleeve drill according to claim 1, wherein the upper and lower parts of the control shell are sealed internal threads, and a boss, an inner cavity and a plain internal thread are arranged between the upper and lower sealed internal threads from bottom to top; a transverse through hole is formed in the side face of the middle of the inner cavity, a valve seat, a valve body and a valve seat are sequentially installed in the inner cavity, the valve body is positioned in the middle of the inner cavity and corresponds to the rotating shaft and the transverse through hole, and the opening and closing of the flushing control valve are realized through the direction conversion of the transverse through hole; and the valve seats are all provided with sealing packing.

3. The safe and environment-friendly device for the abrasion and washing construction of the sleeve punching drill according to claim 1, wherein inner holes are respectively formed in the upper part and the lower part of the pressing threaded sleeve, the inner holes are respectively hexagonal and circular, and the outer wall of the pressing threaded sleeve is a balanced type external thread and is connected with the control shell through the balanced type external thread.

4. The safe and environment-friendly device for the washout construction of the washout drill bit as claimed in claim 1, wherein the compression screw sleeve and the rotating shaft are provided with sealing packing.

5. The safe and environment-friendly device for the washover construction of the washover drill bit as claimed in claim 1, wherein the upper and lower parts of the connecting joint are sealed internal threads, and the middle part of the inner side is a flat internal thread with an inner diameter smaller than that of the sealed internal thread; the upper part and the lower part of the balance working barrel are both provided with sealing external threads, the sealing external threads on the upper part of the balance working barrel are connected with the connecting joint, and the lower part of the balance working barrel is connected with the pipe column in the well; the inner cavity of the middle part of the balance working barrel is provided with a boss, and the upper part of the boss is provided with an inner sleeve.

6. The safety and environmental protection device for the punching, drilling, grinding and washing construction according to claim 1, wherein the side surface of the upper middle part of the inner sleeve is longitudinally provided with two rows of transverse through holes, the number of the through holes in each row is 4, the through holes are arranged in a circumferential array, the upper through holes are oblate, the lower through holes are communicated with the bottom, and the through holes are in a tooth shape with a central hole when viewed from the top.

7. The safe and environment-friendly device for the washdown construction of the washdown drill bit as claimed in claim 1, wherein the blocking pressing pipe has a conical upper portion, a transverse through hole below the conical upper portion, and a flat external thread at a bottom portion, and is connected with a flat internal thread at a middle portion of the connection joint.

8. The safe and environment-friendly device for the punching, drilling, grinding and washing construction as claimed in claim 1, wherein the ball bar is composed of a sealing ball and a bar with a flat thread and a backstop pin hole at the lower part.

9. The safe and environment-friendly device for the flushing and casing drilling and grinding construction according to claim 1, wherein one end of the flushing control valve short connector is connected with the control shell, and the other end of the flushing control valve short connector is connected with the flushing balance valve through a pipe column or a short connector during the flushing and casing drilling and grinding construction.

10. The safe and environment-friendly device for the washover construction of the washover drill bit as claimed in claim 1, wherein during the washover construction of the washover drill bit, the short circuit of the washover control valve is connected with the connecting joint of the washover balance valve through a pipe column or a short circuit, and after the connection, the blocking pressure pipe of the washover balance valve is positioned in the pipe column or the short circuit between the blocking pressure pipe and the washover control valve.

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