Drilling device and drilling method

 

The invention relates to the drilling technique, in particular to a drilling device and drilling method for the development of a borehole with casing pipe installed in the ground before excavation. Drilling device for development drilling wells installed in the casing soil pipe contains drilling tools made with the possibility of a rigid attachment to the lower end of the rod, crane suspension designed to hold the drilling tool with a barbell on the crane rope, the drive to bring the rotation of the rod and the connecting device for the rigid connection between the casing pipe and drive. The rod is made hollow and provided with a first pipe for a fluid medium and a second pipe for the fluid in the upper end of the rod is provided by a first connection for supplying the fluid in the first conduit to the fluid and a second connection that is designed to divert drilling detail through the second conduit to the fluid. There is a removable frame in which the rod is installed with a possibility of rotation and axial movement and which is intended for installation on the casing pipe. The actuator is located on a removable frame, and is Oh, hosts the drive. In the method of drilling for the development of a borehole with casing pipe installed in the ground, drilling tools, associated with the lower end of the rod held in the casing pipe with a crane rope, and using a connecting device the casing is rigidly connected to the rotation drive rod. In the casing pipe installed removable frame in which the rod is held for rotation and axial movement and which is equipped with an actuator. By means of the coupling device the casing is rigidly connected with a removable frame, through the first conduit to the fluid in the hollow rod serves the fluid, and through the second conduit to the fluid in the hollow rod divert drilling detail. Increased drilling efficiency and productivity of the drilling method and drilling device during development drilling wells installed in the casing soil pipe. 2 N. and 11 C.p. f-crystals, 4 Il.

The technical field to which the invention relates.

The present invention relates to a drilling device in accordance with the restrictive part of paragraph 1 of the claims and the way bbrittany.

The level of technology

Current technology is reflected in the patent document FRG No. 2734185, IPC E 02 D 17/14, publ. 08.02.1979, installed in the ground the casing through a bearing cable enter the interior of the drilling device. In the cylindrical housing of the drilling device is a motor for rotation. Using a clamping device on the housing of the drilling device is rigidly clamped within the casing near the base of the borehole, so that the torque of the rotational drive is transmitted to the casing. There is described and the method of drilling for the development of a borehole with casing pipe installed in the ground at which the drilling tool is connected with the lower end of the rod held in the casing pipe with a crane rope and the casing is rigidly connected to the rotation drive rod by means of a connecting device. These method and apparatus selected as a prototype.

Another method of construction of wells with casing pipe is known from patent document France No. 1509586 A. rod reinforced auger drilling with the drilling bucket, having a diameter less than the surrounding casing. When sinking wells drilling auger transports the material in the drilling bucket. When the bucket Zappa rigidly mounted on the carrier, which move in guides on the drill mast while the drill bucket can be disconnected from the drill stem through the mechanism of locking and unlocking. On guided along the mast carrier is also the drive for rotation of the drive drilling auger transmission of rotation through the bar.

In the Handbook of the author Bieske for the construction of wells, volume 1, S. 88, 89, Berlin, 1956, describes how the development of drilling wells without tubing using a fluid medium.

During the construction of the support piles for the construction of buildings known as the method of initial driving into the ground of the casing, for example, by using a pile copra or vibratory hammer. The soil inside the casing can be removed using a drilling device. It is advisable to produce primarily in loose or soft soils, as casing pipe prevents collapse of the borehole walls.

To remove the soil inside the casing pipe is commonly used drilling screw, inner diameter of which is selected in accordance with the internal diameter of the casing. When using auger drilling requires the use of special drilling device with a vertical mast on which is provided solku vertical mast is usually installed on the chassis, and its slope is allowed no more than a few degrees, the use of auger drilling on uneven terrain or in areas with large difference of level is problematic. In some cases, the drilling device and drilling auger must first install a horizontal platform in the casing pipe.

In addition, the drilling device to drill auger or may not be used for the initial installation of the casing pipe in the ground, or requires a significant modification of the device.

The invention

The problem to which the present invention is directed is to provide a method for drilling and drilling devices, to ensure the effective establishment of the borehole with casing pipe.

In accordance with the invention the solution of this problem is achieved by drilling device characteristics under item 1 of the claims and the method of drilling with signs on p. 7 claims. Preferred embodiments of the invention are given in the respective dependent claims.

Drilling device for development drilling wells installed in the casing soil pipe contains burevestniknn to hold the drilling tool with a barbell on the crane rope, the drive to bring the rotation of the rod and the connecting device for the rigid connection between the casing pipe and drive. According to the invention the rod is made hollow and is provided with first and second conduits for the fluid in the upper end of the rod is provided by a first connection for supplying the fluid in the first conduit to the fluid and a second connection that is designed to divert drilling detail through the second conduit to the fluid. There is a removable frame in which the rod is mounted for rotation and axial movement and which is intended for installation in the casing pipe, the actuator is located on a removable frame, and by means of the coupling device provides a rigid connection between the casing pipe and a removable frame that hosts the drive.

The drilling device according to the invention can be used with suspension on the crane, so that large surface irregularities or large level differences between casing pipe and the drilling device does not have any impact on the execution of the drilling method. While suspended on the crane rope drilling device is automatically set in R with high costs.

For effective drilling rod drilling device is made hollow and is equipped with at least two ducts for the fluid. One conduit for the fluid can be used for transporting drilling stuff from the drilling device. Another pipeline can be used for supplying a fluid medium. As the fluid can serve as water or air to create a carrier stream for removal of drilling stuff. However, the piping for the fluid can also be used for supplying a hardening suspension, so that in the process of removing the drilling device from the well may be her fill solidified suspension, in particular such as concrete. For, in spite of the crane suspension, to ensure reliable transmission on the drilling device torque, in accordance with the invention, a drilling device with a removable frame mounted on the upper edge of the casing and Rethimno fix it by means of a connecting device. The connecting device allows you to quickly rasmijoti rigid connection, which in combination with the permanent suspension of the drilling device to the faucet allows you to ensure the effective development Bologna devices working with the formation of geometric or power circuit. According to the invention the connecting device preferably includes a hydraulic collet closers, with which the removable frame is rigidly clamped on the upper edge of the casing. Collet clamps with hydraulic power drive elements provide a rapid clip and detach to create high clamping forces.

In another preferred exemplary embodiment of the invention the first or second connection contain the hinge rotation. Due to this rotating together with the rod piping for the fluid can be reliably connected with stationary devices, particularly with containers for the fluid outside the drill hole.

As drilling devices can be used in various devices, such as drilling buckets. In accordance with the invention optimally performing a drilling device in the form of a drill head of a continuous development of the face with the drill string while drilling column is made hollow and provided with two pipelines, which can be connected with the first pipe for the fluid and a second pipe for the fluid, which finds the layers of the soil, for example rock. In combination with the diversion of drilling things through the pipeline to the fluid due to this can be the development of deeper drill holes. However, the drilling device according to the invention can be fitted with various drilling tools, so that for each subject the development of a soil layer can be set corresponding to the drilling tool.

Further, in accordance with the invention, the drilling device can be suspended on the crane arm, and turned to the arrow side of the drilling device fortified first traction cable going to the boom, and on the other side of the device is hinged to the second traction wire passing to the upper end of the boom. At hung on the crane boom drilling device can influence two pull rope connected with the winch. Due to this, can be suppressed undesirable swinging of the drilling device and, in addition, the drilling device can be easily fit to the crane boom and maintained in that designated position. In this allotted position valve can be used, for example, for positioning and installation of the casing pipe using the second winch without you is Echuca environment. Rod according to the invention can be made with a double wall, with an annular hollow space between the inner core and the outer wall of the rod may form a duct for the fluid. Another pipe for the fluid can be located on the outer side or the inner hollow space bar.

The objective of the invention is solved in a method for drilling development drilling wells with casing pipe installed in the ground, which provides that the drilling tool is connected with the lower end of the rod held in the casing pipe with a crane rope, and using a connecting device the casing is rigidly connected to the rotation drive rod. According to the invention in the casing pipe installed removable frame in which the rod is held for rotation and axial movement and which is equipped with an actuator. By means of the coupling device the casing is rigidly connected with a removable frame. Through the first conduit to the fluid in the hollow rod serves the fluid, and through the second conduit to the fluid in the hollow rod divert drilling detail. This ensures effective development drilling squag is is is the first borehole perform inside of the casing and the drill head with the drill string is introduced into the casing separately from the drilling device, and then drilling device using a rod rigidly connected with the drill string.

The first borehole may be developed for other drilling tool, for example, drilling bucket or drilling auger. While drilling tool can be installed on the drilling device according to the invention and together with him be entered for the development of the first borehole, for example, weak in the lower soil layer. In the development of the first bore in the casing pipe is created free space, which can be used for input and alignment of the drill head with the drill string. Through the use of various drilling tools ensures effective penetration, and the use of the drill head continuous development of the face it is advisable to develop a solid bottom layer.

Further, the method according to the invention provides that the drill head with the drill string before attaching to the post held in the casing pipe by means of a holding device in the position of the connection after mounting the restraint PA connect with casing pipe. It provides reliable and at the same time, a fast connection to the drill the drill head with the rod of a drilling device.

Especially effective fixation of the drill string within the casing for connection with the rod is due to the fact that the retaining device supplying at least one carrier, which have the possibility of radial displacement to the casing pipe and contain holding a fork, on which rests the flange of the drill in position hold. In particular, if you run two, three or four retaining plugs are evenly spaced around the circumference of the upper edge of the casing and are located on the platform. The width of the plug-retaining device matches the outside diameter of the drill, and the flange of larger diameter or wider the rim the drill rests on top of the plug or plugs, providing the desired position hold.

According to the invention a method is provided that borehole develop drilling device through the casing and then into the underlying soil layer. Typically, the casing pipe may be filled only in relatively poor soil. However, in cases when you want construction pornnude casing with the first drilling tool, for example, a drilling bucket. Then on the same drilling device can be strengthened with the second drilling tool such as a boring head of a continuous development of the face, and used for the effective development of the lower casing more hard or rocky ground.

In the General case, the pressure on the drilling tool can be passed through the telescopic rod by an appropriate hydraulic power cylinder. However, efficient and cost-effective solution provides that when the drilling rod is directed to a removable frame with freedom of axial movement, so that the weight of the rod is transmitted by the pressure of the drilling device. While the drillstring may be further provided with a ballast cargoes to create enough pressure for the continuous process of drilling a well.

Further, in a preferred example of the method of drilling the drilling process through the first conduit to the fluid in the hollow rod serves the purge air, and through the second conduit to the fluid divert drilling trifle with the fluid and purge air. In this way, a particularly effective removal of drilling fines by ensuring that C is Vashego of the invention will be described in more detail below with reference to the accompanying drawings, on which:

Fig.1 depicts the input of the drilling tool in the well casing,

Fig.2 depicts the installation of the drilling site on the drilling tool,

Fig.3 depicts a drilling device according to the invention in the drilling process,

Fig.4 schematically depicts a drilling device according to the invention in another example, execution is suspended from the lifting crane.

Information confirming the possibility of carrying out the invention

In Fig.1 shows a floating pontoon with 2 installed on it with a crane 4 arrow 6. For the construction of the supporting piles in weak soil layer 3 has already scored two casing 46. In the first casing pipe 46, which protrudes above the water level, the valve 4 with the rope 5 enter the drilling tool. Drilling tool that consists of a drill head 18 of the continuous development of the face and the tubular drill string 19, the lower the rope 5 to a certain depth to the height of the oil column flange 21 of enlarged diameter.

In this position the drilling tool fixed with the help of restraint 42. The retaining device includes two slide 44 mounted on the annular platform 43, which Rethimno mounted on the upper end of the casing 46. To fix the rage holding forks go under the flange 21 of enlarged diameter, so this flange in a fixed position based on the fork at the top.

After that, the rope 5 unhooking from the drilling tool, and the valve 4 can be used for lifting and moving the drilling site 10, the pontoon 2. As shown in Fig.2, through valve 4 drill site center relative to the drilling tool, which is in a fixed position in the casing pipe 46. Next drill site 10, which is suspended from the crane lifting the suspension 14 on the rope 5, is lowered onto the upper end of the drill string 19 and rigidly interconnected. If necessary, between the drilling site 10 and drill string 19 may include additional elements of the drill string to achieve the desired drilling depth.

When the rigid connection rod 12 of a drilling device with the drill string 19, the pipes 26, 28 for the fluid, which are only schematically represented in the drawing, connected to the respective pipes inside the drill string 19.

When the connection ends, the carrier 44 of the restraint 42 move radially from the drill string 19, so that the drilling device 10 can again be lowered by rope 5 up until the removable frame 20 of the drilling device 10 will not fall n adney pipe 46 and rigidly clamp the removable frame 20 in the casing pipe 46.

Next, the drill head 18 is lowered to the level of the surface of the weak soil layer 3 by lowering the rod 12 of the drilling site 10 with the rope 5.

The drill head 18 together with the drill string 19 is put into rotation by means of hydraulic actuator 16, is placed on a removable frame 20. While the boring head 18, as shown in Fig.3, develops and destroys the soil 3 inside the casing 46 and upon further lowering produces drilling 40 in rocky soil layer 7.

In the development wells, the air under pressure supplied by the arrow P1 in the first 27 connecting the first pipe to the fluid and air flow drilling detail is sent from the drill head to the second pipe for the fluid 28. Drilling detail is given on the upper end of the drilling site 10 via the second connection 29 in the direction of arrow P2. In the construction of boreholes they can be filled with concrete, and if necessary steel reinforcement for structures supporting piles. After the end of the working process of the drilling device can be easily moved by the valve 4 to the next casing pipe 46 without the necessity of changing the position and configuration of the pontoon 2.

In another exemplary embodiment of the invention according to Fig.4 b is described above. To remove the unwanted rocking of the drilling site 10 and at the same time allow transverse displacement of the drilling site 10 on the bolt 6 between the drilling site 10 and the bolt 6 is provided first of the rope 31. To resolve lateral variations it can be stretched by using not presented here winches. In addition, on the other hand drilling node 10 is attached to it a second traction cable 32 running from the top boom 6. On top provides a guide block, which is placed at a certain distance from the boom 6 on the lifting rope 5. By an appropriate tension of the second traction wire 32 and the first traction cable 31 can be suppressed undesirable swinging of the drilling site 10.

Claims

1. Drilling device for developing a borehole (40) installed in the casing soil pipe (46) containing drilling tools made with the possibility of a rigid attachment to the lower end of the rod (12), crane suspension (14) designed to hold the drilling tool with a rod (12) on the crane rope (5), the actuator (16) to adjust the rotation of the rod (12) and the connecting device (22) for the implementation of tight junctions me what wires (26) for the fluid and a second conduit (28) for the fluid, in the upper end of the rod (12) provided the first connection (27) for supplying the fluid in the first pipe (26) for the fluid and a second connection (29) designed to divert drilling detail through the second conduit (28) for the fluid, there is a removable frame (20), in which the rod (12) is installed with a possibility of rotation and axial movement and which is intended for installation in the casing pipe (46), the actuator (16) is located on the removable frame (20), and by means of the coupling device (22) is provided with a rigid connection between the casing pipe (46) and a removable frame (20), where the actuator (16).

2. The drilling device according to p. 1, characterized in that the connecting device (22) is equipped with a hydraulic collet clamps (24), through which the removable frame (20) is rigidly clamped on the upper edge of the casing (46).

3. The drilling device according to p. 1, characterized in that the first connection (27) and/or the second connection (29) provided with a hinge rotation.

4. The drilling device according to p. 3, characterized in that the drilling tool is made in the form of a drill head (18) of the continuous development of the face with the drill string (19), and the drilling string (19) is made hollow and provided with two trubo) for the fluid in the rod (12).

5. The drilling device according to p. 1, characterized in that it with the rope (5) is suspended on the boom (6) cock (4), and converted to an arrow (6) the side of a drilling device fortified first traction cable (31), passing to the arrow (6), and on the other side of the device is hinged to the second traction cable (32), passing to the upper end of the boom (6).

6. The drilling device according to any one of paragraphs.1-5, characterized in that the rod (12) is made with a double wall.

7. The method of drilling for the development of borehole (40) with casing pipe (46), installed in the ground, containing operations: drilling tool connected to the lower end of the rod (12) is held in the casing pipe (46) with the help of crane rope (5) and using a connecting device (22) of the casing (46) is rigidly connected to the actuator (16) rotation of the rod (12), characterized in that the casing pipe (46) install the removable frame (20), in which the rod (12) retain for rotation and axial movement and which includes an actuator (16), by means of the coupling device (22) of the casing (46) rigidly connect the removable frame (20), through the first pipe (26) for the fluid in the hollow rod (12) serves the fluid through the second conduit (28) for flowing a second well perform inside of the casing (46), moreover, the drill head (18) with the drill string (19) is introduced into the casing (46) separately from the drilling site (10), and then the rod 12 of the drilling unit (10) is rigidly connected with the drill string (19).

9. The method of drilling under item 8, characterized in that the drill head (18) with the drill string (19) before attaching it to the rod (12) hold in the casing pipe (46) using a holding device (42) in position connection after mounting the holding device (42) is cut off, while the drilling site (10) remains hung on the rope, and finally a removable frame (20) is rigidly connected with the casing pipe (46).

10. The method of drilling under item 9, characterized in that the holding device (42) is provided at least one carrier, which have the possibility of radial displacement to the casing pipe (46) and contain holding a fork, on which rests the flange of the drill string (19) in position hold.

11. The drilling method according to any one of paragraphs.7-10, characterized in that the bore-hole (40) develop a drilling device inside the casing (46) and later in the underlying soil layer.

12. The drilling method according to any one of paragraphs.7-10, characterized in that the drill rod (12) is directed to a removable frame (20) with freedom of axial movement, so citica fact, in the process of drilling through the first pipe (26) for the fluid in the hollow rod (12) serves the purge air, and through the second conduit (28) for the fluid divert drilling trifle with the fluid and purge air.



 

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