DE3323391A1 - DEVICE FOR DRAWING DRILL TUBES FROM A DRILL BASE AND RELEASING THE SCREW - Google Patents

Abstract

1. Apparatus for the pulling of bore hole tubes (5, 6) from a bore hole and the release of the screw coupling (breaking) by means of a fluid-operated working piston/cylinder unit (cylinder), characterised by a pulling cylinder (1) operating, together with the breaking device, in the axial direction of the bore hole tubes (5, 6), supported, at its ends, on the one hand on a base plate (11) and on the other hand on a breaking device (17), gripping jaw units (18, 19) arranged axially one after another, rotatable radially in opposite senses and comprising two gripping cylinders (34, 35) by means of which the bore hole tubes (5, 6) are gripped, and a release cylinder operable in the peripheral direction in relation to the bore hole tubes (5, 6) and supported on each of the gripping jaw units.

Description

PATENT LAWYERS

DIPL.-ING. ALEX STENG ER

Kaiser-Friedrich-Ring 70. ".-" '- - "-" * OfPL.-fHG. WOLFRAM WATZKE

D-4000 DÜSSELDORF π .-:::: ":" DiKL-IMG. H E I N Z J. RING

ο / EUROPEAN PATENT ATTORNEYS

Our reference number: 24 436 Date: June 27, 1983

Hütte & Co. GmbH, Ziegeleistraße, 5960 Olpe 3323 391

Device for pulling drill pipes out of a drill hole and Loosen the screw connection

The invention relates to a device for pulling drill pipes from a drilling base and loosening the screw connection (breaking) by means of fluidically operated working piston / cylinder units (cylinders).

The most diverse devices for foundation engineering and drilling technology, such as hydraulic drilling machines for performing anchor, injection and Freeze wells are known. They consist of one that can be moved up and down on a mobile scaffold by means of a feed motor Pressurized medium-operated drill with either or together acting on a drill string and a reversible impact motor Rotary motor. The drill string can consist of an inner string of drill rods to be connected to one another by sleeves and a second string of outer drill pipes to be connected to one another by sleeves. Instead of a socket connection For the individual pipe sections, screw-in nipples can also be provided, which altogether consist of a large number of individual Drill pipes form a drill string. Depending on, for example, an anchor length or a blast hole depth, with drill strings of this type to drill the hole to the predetermined depth, for example drilled up to 50 m and then separated the drill from the drill string. The last piece of pipe protrudes from the Soil or the like out. The anchor is then placed or injections carried out or detonators, depending on the situation Purpose of the hole, inserted and the drill string is gradually pulled by means of a hydraulic pulling device.

During the pulling process, whenever a pipe connection is released,

is pulled, this pipe connection is loosened, which was previously done about every 2 m by a hydraulic pipe loosener according to the German Offenlegungsschrift 29 48 221 was made. This Pipe loosener consisted of two spaced apart on a holder that could be pushed onto the pipe pieces to be loosened and opposite one another Pliers arranged in the direction of action, the pliers jaws of which are hydraulically connected to one another, thereby releasing a connection opposite torque was actuated.

In addition, a base plate was also used to pull the drill pipes, a pull cylinder and a pull trolley are required. All of these devices were individually and independently mounted and Butetzt, so that the pulling and breaking process required a considerable amount of time and carried out only by qualified personnel could be. In addition, there was always the risk of the individual parts jamming due to the instability of the overall device.

Proceeding from this, the invention is based on the object in a device of the type mentioned at the outset, a simple release device for pipe connections with a pulling device to combine.

Such a device should - regardless of the direction of the Work the hole and the drilled surface.

AIa technical solution will be on a base plate on the one hand and a breaking device on the other hand with its front ends supported, in the axial direction to the drilling ' tubular pulling cylinder and a breaking device, consisting from two axially arranged one behind the other and radially opposite one another, clamping the drill pipes radially by means of clamping cylinders rotatable clamping jaw units and one on each one clamping jaw unit supported, in the circumferential direction to the drill pipes acting release cylinder proposed.

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The invention is based on the basic idea, the drawing cylinder between a base plate supported on the drilled surface and a clamping jaw unit, which in turn consists of two axially spaced clamping bracket units, which are connected to each other for releasing the pipe connection by a further, working piston / cylinder unit acting in the circumferential direction of the drill pipes can be rotated.

The invention not only provides a captive unit for pulling drill pipes and loosening their screw connection Basic elements created, but also the pulling and releasing so much that it is carried out by auxiliary staff can be. In addition, the combination according to the invention represents a considerable simplification of the technical equipment for pulling and loosening drill pipes and also allows a quick replacement of defective sub-assemblies.

If the base plate according to the invention by a transverse to the drill pipes extending axis is pivotably articulated to the pulling cylinder, it can be directly on any Adjust the base area to the drilling angle and thus ensure the best possible frictional connection when pulling the drill pipes.

If possible, the pulling and breaking device according to the invention To push over the free end of the drill pipe, the use of a hollow piston cylinder unit is recommended for the central one Taking up the drill pipe as a pulling cylinder, because this avoids any tilting of the drill pipe when pulling. Interchangeable inner chucks between the axial bore of the piston rod and the drill pipe allow an improved Align the direction of pull with the direction of drilling.

The jaw units can thereby be largely simplified be that they each have one rigidly connected to it and one opposite, in the direction of the piston rod of the clamping cylinder Have displaceable clamping jaw. It supports itself

the clamping cylinder directly on the rigid jaw and the Piston rod of the clamping cylinder in the radial direction by means of the displaceable clamping jaw on the drill pipe. With such Clamping jaw units can both clamping jaws easily exchanged or radially with respect to the drill pipe in this way adjusted so that they are based on the current Bohrrohrdiametercr adjust. Both jaw assemblies are required basically interchangeable and radially at a short axial distance from one another by means of a rotary flange connection held together twistable. ^ -

If the release cylinder with its front ends, i.e. on the one hand with the free cylinder end and on the other hand with the piston rod end, are pivotably mounted on the ends of the clamping cylinders pointing away from the drill pipes, the screw connection is loosened possible with comparatively low forces. The angle at which the two jaw units are used to loosen the screw connection are rotated against each other, can be adjusted by the piston rod travel of the release cylinder, it is in the Usually about 25 °.

Hit the inventive pulling and breaking device can both a right-hand and a left-hand thread can be loosened. To convert from left-hand to right-hand thread or vice versa, only the Release cylinder released at one of its front ends from the clamping jaw unit there and pivoted through about 270 ° and in this Position reconnected to the previously released clamping jaw unit; the latter is to this in the opposite sense of rotation as the release cylinder is twisted in relation to the other clamping jaw unit.

A hydraulic sequential circuit to the cyclical! Press at least a clamping cylinder and the pulling cylinder in alternation with each other allows the drill pipe to automatically up to to pull the next pipe fitting out of the borehole. For this purpose, at least one of the two clamping jaw units initially clamps fixed as a drill pipe, then the pulling cylinder moves, starting

from its fully retracted position to its fully extended position Position and pulls the drill pipe out of the drill bed. Then the clamping cylinder (s) opens and gives (give) the drill pipe free, so that the pulling cylinder in its output position and the entire process can be repeated. . .

Further details, features and advantages of the subject matter of the invention emerge from the following description the accompanying drawing, in which a preferred embodiment of an inventive pulling and breaking device has been shown. In the drawing show:

Fig. 1 A pulling and breaking device in side view, for. T. cut;

2 shows the same device in a further rotated by 90 ° Side view as well

Fig. 3 the same device in plan view, for. T. in section along the line I - I in FIG. 1.

A drawing cylinder 1 is preferably not shown in detail Way pressure medium, in particular hydraulically, can be acted upon and consists of a hydraulic cylinder 2 and a hollow piston rod 3 with a screwed onto it at the end Flange A. A drill pipe 5, 6 can be in axial. Direction can be pushed freely through the entire pulling cylinder 1 and occurs in the Flange 4 in the pulling cylinder 1 and on the opposite End again. There two eyes 7 are screwed to the end face 8 of the hydraulic cylinder 2, so that the common Axis 9 of the two eyes 7 extends at right angles to and in the same plane as the axis 10 of the drill pipes 5, 6.

A base plate 11 for supporting the pulling and breaking device on the drilled surface 12 is transverse to the direction of the axis pivotably articulated to the eyes 7 by means of eyes 13, 14 and bolts 15 and has a bore 16 for freely pushing the Drill pipe 5, 6 on. It is so big that the drill pipe 5,

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even with stronger pivoting of the base plate 11 around the bolts 15 remains unhindered.

The flange 4 is part of the lower of two breaking devices 17 forming clamping jaw units 18, 19.

A clamping jaw unit 18, 19 consists of two spaced-apart, perforated base plates 4, 20; 21, 22 through which the drill pipe 5, 6 is pushed. Between the base plates 4 _S 20 and 21, 22 is a respective clamping jaw 23, 24 fixed and an opposing jaw 25, slidably 26th

The clamping jaws 23, 24 can be releasably held by two bolts 27 and 28 and grasped by means of a handle 29 for replacement will.

The displaceable clamping jaws 25, 26 are by means of screw bolts 30, 31 held in a circumferential groove by the piston rods 32, 33 of hydraulic clamping cylinders 34, 35. This clamping cylinder act in the direction of the axis 10 of the drill pipes 5, 6 and at the same time form a lateral connection of the base plates 21, 22 and 4, 20, which are connected to one another on the other sides essentially by welded webs or sheets.

The pickles 27, 28 or 30 and 31 allow quick replacement of the clamping jaws 23, 24 or 25, 26 according to the respective pipe diameter.

Longitudinal and / or transverse ribbing increase the grip of the Top surfaces 36, 37 or 38, 39.

In Fig. 13, the two jaw units 18, 19 are shown in such a way that the piston rods 32, 33 do not form an angle with one another form, but what they do in the position of use - as shown in FIGS. 2 and 3. In Fig. 1 it can only be seen that at the end of the clamp facing away from the drill pipe

3323331

cylinder 35, the eye 40 is pivotally attached to the end 41 of a hydraulic release cylinder 42.

In Fig. 2, the release cylinder 42 and the upper jaw are ii 19 is shown in perspective, so that the offset arrangement of the two clamping jaw units 18, 19 is also shown in side view is recognizable. The minimum and maximum angle formed by the two clamping jaw units 18, 19 depends on the basic length and the thrust of the release cylinder 42. This is at its front end 43 in the same way, but from the opposite one Side, on the end of the clamping cylinder 34 that is away from the drill pipes 5, 6 is pivotally attached.

Web 44 extending between the base plates 4, 20 or 22, 23 connect the base plates and guide the clamping jaws 25, 26. In addition, pipe sections 45 between the base plates offer another stop.

Nipples provided there can be provided in the area of the pipe screw connections Sockets or the pipe ends can be provided with toothed surfaces 46 which correspond to the jaw surfaces 36, 37 and 38, 39, respectively.

The bore 16 of the base plate 11 can - as can be seen from FIG borrowed - also be designed as a wide slot 47 from a base plate edge.

In a practical embodiment for Bohrrohrro a Durc Knife between 70 and 140 mm, a pressure force of the pulling cylinder of 80 kN is recommended, a clamping force of the clamping cylinder wa 60 kN and a twisting force of the release cylinder3 of about 10 k. The working pressure of the entire hydraulic system is then be preferably 320 bar and the angle of rotation for loosening about 25 °. The required pump capacity for the hydraulic system is 80 l / min at 3000 revolutions / min. The entire system is made up of a sequential circuit for the drawing process and a Individual actuation for the release process in the drawing is not

* from

Controlled manner shown. The stroke of the hollow piston or than two normal piston cylinders actuated in parallel next to the drill pipe as pulling cylinders is approximately 1 m long pulling cylinder about 25 cm.

Rotating flanges 48 connected to the jaw units 18, 19, 49 allow the clamping jaw units to rotate relative to one another by means of the release cylinder 42.

It can be seen that, when drawing pipes, basically both clamping jaw units can be actuated, but preferably only the lower Klerrunbackcneinheit 18 is actuated, especially for this purpose large cheek surfaces 36, 37 which are sufficient to offer enough support even on a smooth outer surface of the pipe. In contrast, the clamping jaws 38, 39 of the clamping jaw unit 19 can be smaller, since they are usually only connected with toothed surfaces 46 of a pipe socket or a pipe nipple is used, the clamping jaw unit 18 being the one in the drawing unrecognizable end of the drill pipe 5 and the clamping jaw unit 19 clamps the opposite end of the drill pipe 6 to loosen the screw connection.

List of reference symbols

1 pulling cylinder

2 hydraulic cylinders

3 piston rod

4 flange (base plate)

5 hole

6 hole

7 eyes

ß face

9 axis

10 axis

11 base plate

12 area

13 eyes

14 eyes

15 bolts

16 bore

17 breaking device

18 jaw assembly

19 Jaw Assembly

20 base plate

21 base plate

22 base plate

23 jaw

24 jaws

25 jaw

26 jaw

27 bolts

28 bolts

29 handle

30 bolts

31 stud bolts

32 piston rod

33 piston rod

34 clamping cylinder

35 clamping cylinder

36 jaw surface

37 jaw surface

38 jaw surface

39 jaw surface

40 eye

41 front end

42 release cylinder

43 front end

44 bars

45 pipe sections

46 tooth surfaces

47 slot

48 rotary flange

49 rotating flange

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Claims (6)

PATENT AGENCIES .... - pi-PL-ING. ALEX STENGER Kaiser-Friedrich-Ring 70 *: "-" - -.; - .. pil'X.-ING. WOLFRAM WATZKE D-4000 DÜSSELDORF 11.: ".. ·" Z- "*" - '"- *' i> lpUNG. HEINZ J. RING ^ '' EUROPEAN PATENT ATTORNEYS Our reference: 24 436 - Date: 27 June 19Ö3 Hütte 4 Co. GmbH, Ziegeleistraße, 5960 Olpe A_ η s ρ rü che 3323391>> —— ■ 1./Device for pulling drill pipes (5, 6) out of a drilling base and loosening the screw connection (breaking) by means of fluidly operated working piston / cylinder units (cylinder), characterized by 'one, on a base plate (11 ) on the one hand and a breaking device (17) on the other hand with its front ends supported, in the axial direction to the drill pipes (5, 6) acting pulling cylinder (1) as well as the breaking device, consisting of two the drill pipes (5, 6) radially by means of clamping cylinders (34, 35) clamping jaw units (18, 19) arranged axially one behind the other and rotatable radially in relation to one another and a release cylinder (42) which is supported on a respective clamping jaw unit (18, 19) and acting in the circumferential direction of the drill pipes (5, 6). 2. Apparatus according to claim 1, characterized in that the base plate (11) around a transverse to the. Drill pipes (5, 6) extending Axis (9) is pivotably articulated to the pulling cylinder (1). 3. Apparatus according to claim 1 or 2, characterized by a hollow piston cylinder unit for the central receiving of the Drill pipe (5, 6) as a pulling cylinder (1). 4. Device according to one or more of claims 1 to 3, characterized in that each clamping jaw unit (18, 19) one rigidly connected to it and one opposite one in the direction of the piston rod (32, 33) of the clamping cylinder (34, 35) has displaceable clamping jaws (23, 24 or 25, 26). "copy ' Telephone fO2 U) S7 21 31 · Ttltx: 85 88 429 patt d · Telegram address: Rheinpalent · Postal check account Cologne (BLZ 370100 SO) 2276 10 - 503 5. Device according to one or more of claims 1 to 4, characterized in that the release cylinder (42) has its front ends (41, 43) on those facing away from the drill pipes (5, 6) Ends of the clamping cylinders (34, 35) pivotably mounted 13t. 6. Device according to one or more of claims 1 to 5, characterized by a hydraulic sequence circuit for cyclic actuation of at least one clamping cylinder (35, 34) and the pulling cylinder (1) alternately with one another. R / SCH / td COPY