DE1484393B1 - DRILLING DEVICE FOR EXTENDING THE SOLE OF A DRILLING HOLE - Google Patents

Description

1 2

The invention relates to a drilling device for FIG. 1 shows the longitudinal section of a drilling device, widening the bottom of a borehole with an on, whereby for the sake of greater clarity the hydraulic cables suspended and draining into the borehole are broken off and a two-part lowerable drilling tool carrying a rotatable drilling tool is shown,
Body, which is held by a holding device on the 5 F i g. 2 the partial longitudinal section of the drive borehole wall is held and is provided with a drive device for the drilling tool in a larger motor for the drilling tool. Rod,

In a known drilling device for producing F i g. 3 on a larger scale the connection of the

make a well are for the holding device lifting cylinder with the drilling tool,

and the drilling tool electrical drive means ίο Fig.4 the scheme of an example of the hydraulic

provided that a control of systems required above ground,

the and no automatic operation of the Bohrvor- F i g. 5 shows the longitudinal section of a control valve in

enable direction, the drilling tool of which always corresponds to the closing of the drilling tool.

has the same diameter and is within a drilling position.

pipe works, so that the bottom of the borehole is not 15 In the case of the one shown in the drawing (F i g. 1)

can be expanded. The embodiment is the drilling device according to

There are also drilling devices of the invention at the outset used in a drill pipe T , the type mentioned with mechanical drive of the holding through a process known to the bottom of the drilling device and the drilling tool that has been lowered into the hole. The drilling device is expandable, but can also be independent of the drive of the holding device in a non-cased borehole. be applied.

In another known drilling device, the drilling device consists of a body 1

which is at the lower end of a rotatable, wasserfüh- of preferably cylindrical shape and is at the

renden pipe mounted drilling tools suspended on a rope C of a lifting device, which is attached to the

Toothed segments are coupled to a piston which is attached to the body 1 by means of an eyelet 2. The body

is pushed down by the water pressure per 1 should not twist, and the rope C is

and spreads the drilling tool apart. As a result, there is no torsion on the part of the body 1

Holding device for clamping the Bohrvorrich- subjected.

The body 1 contains a holding device 3 which

seen, the drilling tool also receives its rotary 30 from two diametrically arranged, opposing

propulsion by means of the pipe from above ground. movable clamp shoes. But it can

The invention is based on the object of also providing three, four or more clamping shoes

completely automatic operation of the to widen the be, which is evenly over the circumference of the body

Sole of a borehole certain drilling device pers 1 are distributed. The individual clamping shoes of the

and to enable their holding device. 35 holding device 3 are equipped with horizontal hydraulic

According to the invention, the drive motor for hydraulic lift cylinders 4 is coupled, which are connected to the inner

the drilling tool a hydraulic rotary motor, and wall of the body 1 are fixed,

the holding device has hydraulic lifting cylinders. In the body 1 are also a vertical one

on, furthermore, the drilling tool is supported by a hydraulic hydraulic lifting cylinder 5 and a hydraulic one

Lischen lifting cylinder expandable, and the lifting cylinder 40 mounted rotary motor 6, whose task is below

are described by pressure valves as well as electrical control. The lifting cylinders 4 and 5 as well

valves controllable. This adjustable electric rotary motor 6 is driven by a hydraulic

tric control valves can be fed to the liquid circuit that is inside the upper part of the system

be influenced so that the drilling tool itself-body 1 is housed. This hydraulic

active depending on the drilling resistance spread 45 system contains an electric motor 7, which is of a

is carried after the holding device by its hy-horizontal plate 8 and with a pump 9

hydraulic lifting cylinder is coupled to the body of the drilling unit, which is connected to a fluid container 10

direction has clamped on the borehole wall. connected. The electric motor 7 is from

The pressure valves expediently regulate the liquid fed to an electrical cable 11, which is fed through a

keitsdruck in the rotary motor and in which the drill 50 gland 12 is inserted in the body 1. This

convincing spreading lifting cylinder such that the spreading cable 11 forms the only control line in the

tion of the drilling tool at a reduction in the body 1 housed mechanism while

Drilling resistance below a certain value affects all hydraulic lines inside this body.

is increased or decreased when the liquid pers 1 are housed.

pressure in the rotary motor below a certain value 55 The rotary motor 6 has a pinion 13 which is in a

falls. Internal ring gear 14 engages a bushing 15 (FIG. 1

According to a further feature of the invention is and 2). On the socket 15 a disc 16 is bean the piston rod of the spreading the drilling tool, which is provided with tabs 17 on which A stop is attached to the hydraulic lifting cylinder and the cutting edges of a drilling tool 18 are linked brought, which are in one end position of the piston rod 60. Each cutting edge (Fig. 1) is on a tenon with a pivotable in the circuit of the electrical control 19 and can all intermediate valve for the holding device lying circuits between one shown in full lines occupy contact and in the other end position with a two-closed position and an open position, th switching contact interacts, the one in the circuit for the left cutting edge with dashed lines of the electrical control valves for which the boring mill 65 is drawn. The socket 15 (Fig. 2) is of a spreading lifting cylinder is located. Flange 20 held at the lower end of the

An exemplary embodiment of the counterpart body 1 of the invention is fastened by means of screws 21.

Status is illustrated in the drawing. It shows the internal ring gear 14 and the socket 15 are

3 4

connected to one another by an annular disk 22. cylinder 5 and the rotary motor 6 feeding line

Internal ring gear 14, ring washer 22, bushing 15, 49 is arranged.

The pressure valve 48 is always set so that it only opens freely by means of roller bearings with conical rollers 23, 24 and rotates the flow of liquid in the opening of the flange 20. The drilling tool 18 (FIG. 1) continues in a lifting cylinder 4 beyond a certain value P ₁ , which extends into a recess 27.

Has the shape of an elongated hole, wherein a pin 28 The line 49 is with the rotary motor 6 via a

slides, which can be provided with a roller. The pressure valve 50 connected to a pressure P ₂ pin 28 is attached to a yoke piece 29, which is set io and part of the pressure fluid

on the piston rod 30 of the hydraulic Hubzylin- through a line 51 via a control valve 52 to-

ders 5 with the interposition of ball bearings 31, returns when the pressure in the rotary motor 6

32 is mounted so that the yoke piece 29 is free to for some reason this value P ₀ over-

the piston rod 30 can rotate, wherein it strides through.

this is shifted in the vertical direction. This control valve 52 is shown in FIG. 4 in a first Yoke piece 29 is on the piston rod 30 by means of a position and in FIG. 5 in a second position this arranged shoulder 33 as well as by means of shows. It consists of a housing 52 a, of which one screwed onto the end of the piston rod 30, two ducts opening into the liquid container 10 Mother 34 held. The drilling tool 18 ends lines 53, 54 and two lines 55, 56 go off, below in a curved part 35, which has a spoon 20 of which the line 55 and above the piston forms and cuts off the earth and at the same time the line 56 in the area of the piston rod 30, so picks up detached overburden when the boring machine - below the piston, in the lifting cylinder 5 tool 18 is closed. When the drilling tool ends.

18 has more than two cutting edges, the articulated In the housing 52 a is a slide 52 & sliding setting up the cutting edges shown in FIG. 3 illustrated, which is coupled to an electromagnet 57

clear design. In this case the arms are and has two passages 52 c, 52 d . In the

26 of the cutting instead of the recess 27 with the normal position of the slide 52 & connects the

a pivot pin 36 and the yoke piece 29 with passage 52 d the line 56 with the line 54. In

Cheeks 37 provided, the number of which corresponds to the number of the other in FIG. 5 position shown, in turned cutting corresponds to. On these cheeks 30 which the slide 52 & against the pressure of a

37 short links 39 are mounted in pin 38, is shifted to the left on return spring 52 e, this is

those with the pivot pin 36 interrupted the ends of the arms connection and the line 55 with the

26 of the drilling tool 18 are articulated. Line 53 connected. The line 51 opens into

When the horizontal lifting cylinder 4 of a chamber 52 / inside the control valve 52 is actuated the holding device 3 clamps the body 1 firmly 35 and is connected to the line 56 when the

against the drill pipe T. If, in addition, the vertical slide 52 & assumes its left end position, as in FIG

Lifting cylinder 5 in the sense of pulling out its KoI- F i g. 5 is shown.

rod 30 is actuated, the cutting edges of the liquid drilling tool 18 leaving the rotary motor 6 are spread and press thereby flowing through a line 58 and a line 59 against the ground. This position is for the left ₄₀ From the junction of these two lines cutting edge in FIG. 1 shown in dashed lines. 58, 59 is a pressure _{set to a pressure P 3} when the hydraulic rotary motor 6 valve 60 is branched off. The line 59 is actuated via a, all cutting edges of the drilling control tool 18 actuated by an electromagnet 61 a are set in rotation, namely valve 61 and a line 59 a with the lifting cylinder in one of the direction of their cutting edges 45 respectively 5 connected above the piston. When the speaking sense. Fluid pressure inside the lifting cylinder 5 den.The various elements are achieved by means of a value P ₃ , the hydraulic device controlled by the rotary motor 6 flows, which, in addition to the flowing fluid, flows through the pressure valve 60 and fluid container 10 and the pump 9 which is in through a line 62 to the liquid container F i g. 4 lines and accessories shown ent- 50 10 returned.

holds. The piston rod 30 in the vertical lifting cylinder 5. The electric motor 7 drives the pump 9 via an actuated in its lower end position, e.g. B. by means of a mechanical coupling 41 on. The pump 9 is stop 63, one in the circuit of the electric the liquid container 10 via a suction magnet 61a located switching contact 64. The electrical line 42 and with the lifting cylinders 4, the holding 55 tromagnet 61 α then interrupts via the control device 3 the connection between the line 59 via a line 43, an electric valve 61 Control valve 44 and the connected to this and the line 59 a and connects the line 59 Lines 45 and 46 in connection. via a line 65 to the area below the Depending on the position of the control valve 44, one piston in the lifting cylinder 5 is activated on the switching contact 64 or the other side of the lifting cylinder 4 is fed, so that 60 is also the electromagnet 57 of the control valve the lines 46 are alternately connected as a pressure line or 52.

serve as a return line. Actuate the control valve 44 in the upper end position of the piston rod 30.

with the liquid container 10 connecting line her stop 63 takes a switching contact 66, which the

The circuit of the control valve 44 for the lifting cylinder 4 enables the return of the pistons

Lifting cylinder 4 displaced liquid. The control 65 of the holding device 3 interrupts,

valve 4 is in connection with in every position The mode of operation of the device is as follows:

a pressure valve 48 which is in one the other hy- After the drilling device in the well so

hydraulic facilities, namely the stroke distance has been lowered until the pin 19 of the

Claims (3)

5 6 Drilling tool 18 is located at the lower edge of the drilling through the control valve 52 in the lower part of the pipe T , the electric motor 7 is a lifting cylinder 5, whose piston switches in the direction of and drives the pump 9, the line arrow F ₂ moved up. That pressurized by the Elektro-43. The piston of the horizontal magnet 57 actuated control valve 52 enables the lifting cylinder 4 to be pressed outwards, 5 a return of the liquid located in the upper part of the lifting cylinder and the holding device 3 clamps the body 1 to the 5 liquid through the line 55, the drill pipe T. . When the liquid pressure exceeds the passage 52 c of the slide 52 b and the Leiim inside the lifting cylinder 4 the set _{pressure P 1} device 53 to the liquid container 10. The circumferential of the pressure valve 48 is exceeded, the line drilling tool 18 closes again and leads to 49, and fed the rotary motor 6 begins to rotate to completely close the spoil together. The liquid emerging from it feeds.
a sense corresponding to its cutting angle. In the upper end position of the piston of the Hubzylinum runs, is expanded. The control valve 52 is located in the position shown in FIG. 15 corresponding to the fully closed position. 4 position, in which the drilling tool 18 actuates the switching contact 66, the line 55 is closed. The pressure fluid, the control valve 44 for feeding the lifting cylinder, can consequently enter the part of the lifting cylinder 5 of FIG. 4 in such a way that the direction of flow passes above the piston. When the liquid in this lifting cylinder 4 is reversed. The keitsdruck the setting _{pressure P 3 of} the pressure valve 60 20 pistons are consequently reached inwards, a part of the liquid flows through this to the center axis of the drilling device back-pressure valve 60 and passes through the line 62, and the holding device 3 lifts off that back to the liquid container 10. Drill pipe T. The whole drilling device can be pulled out of the borehole if for any reason and especially then. A hand low resistance of the ground of the liquid control makes it possible to give a current pulse to the keitsdruck inside the lifting cylinder 5 under the electromagnet 61a, to bring the control valve value P ₃ down, the pressure valve 60, 61 closes in a position which causes an opening of the fluid drilling tool 18 coming from the rotary motor 6 and a release of the overburden return goes completely through the lifting cylinder 5. and seeks to spread the drilling tool 18 until the 30 You can repeat the operation as often as Pressure inside the lifting cylinder 5 again as it is necessary to the bottom of the borehole Pressure exceeds _{P 3.} to collect the largest amount of overburden. While The spreading of the drilling tool 18 is therefore this operation, all operations are automatic automatically depending on the resistance carried out. The only one hand-removed for days it finds regulated during its work. 35 guided control process consists only in the If for some reason the pressure in the electric motor 7 is switched on and off. There no Inside the rotary motor 6 the setting pressure P ₂ of the hydraulic independent of the drilling device Pressure valve exceeds 50, this leads to a part facilities are available that do not need any of the fluid is lowered through line 51 into the chamber hydraulic lines into the wellbore 52 / of the control valve 52 and pushes the slide 40 to become. 526 to the left until the control valve 52 closes the line When the drilling device according to the invention 55 connects to conduit 53, while the through is applied to a non-prepacked borehole the pressure valve 50 and the line 51 are to be returned, they have practically the same shape end Liquid through line 56 in the part device and operation as described above. In of the lifting cylinder 5 below the piston in this case, the shape and dimensions of the the piston rod 30 is guided. The lifting holding device 3 as well as that on it by the lifting cylinder 5 then tries to ensure that the boring cylinder 4 exerted pressure by those 18 to close. Be divorced during this movement that will occur in a cased borehole which are turned in the upper chamber of the lifting cylinder 5, so that in all cases of the Liquid located via the holding device 3 exerted on the borehole wall by means of the holding device 3 bond standing lines 55 and 53 to the Flüs- force generates sufficient friction to the fluid container 10 returned. The pressure in the body of the drilling device against the interior of the borehole of the rotary motor 6 decreases as a result of jamming wall when the drilling tool 18 in whose, the pressure valve 50 closes again, the rotation is displaced. Return spring 52 e guides the slide 52 b into its 55. It can also be seen that if the end position is not right back, whereby the line 55 cased borehole, the above-mentioned precondition is blocked and a new feed of the lifting cylinder 5 tongues that the pivot pin 19 the drilling tool in the direction of arrow F _{1 is} made possible. 18 under the lower edge of the drill pipe T Must be reduced by suitable regulation of the set _{pressure P 3} , in this case irrelevant of the pressure valve 60 and the set pressure P _{2 of} the 60, and it is sufficient to place the device in the drilling Pressure valve 50 will block the pivot hole lower to the point where the expansion motors 6 are avoided and the greatest possible effect is to be degree of efficiency for cutting and penetrating the _η .. Drilling tool 18 received in the ground. Patent claims: When the piston of the lifting cylinder 5 is in its 65 1st drilling device to expand the sole has reached the lower end position, the switching of a borehole acts with a contact64 on the electromagnet 57 of the control pendant and which can be lowered into the borehole valve 52. As a result, the fluid passes the rotatable drilling tool supporting body, the held by a holding device on the borehole wall and with a drive motor is provided for the drilling tool, thereby characterized in that the drive motor is a hydraulic rotary motor (6) that the Holding device (3) hydraulic lifting cylinder (4) that the drilling tool (18) through a hydraulic lifting cylinder (5) can be expanded and the lifting cylinders (4, 5) by pressure valves (48, 50, 60) and electrical control valves (44, 52, 61) are controllable. 2. Drilling device according to claim 1, characterized in that the pressure valves (48,50,60) the fluid pressure in the rotary motor (6) and in the lifting cylinder that spreads the drilling tool (18) (5) regulate in such a way that the expansion of the drilling tool (18) automatically corresponds to the drilling resistance is adjusted. 3. Drilling device according to claim 1 or 2, characterized in that on a piston rod (30) of the hydraulic lifting cylinder (5) spreading the drilling tool (18) is a stop (63) is attached, which is in one end position of the piston rod (30) with one in the circuit of the electrical control valve (44) for the holding device (3) lying switch contact (66) and in the other end position with a switching contact (64) cooperates in the circuit of the electrical control valves (52, 61) for the lifting cylinder (5) lies. 1 sheet of CGFY drawings 909 543/3