DE1964074A1 - Compensator - Google Patents

Description

Karlsruhe, December 17th, 1969

INDUSTRIE-WERKE KABLSBUHE Aktiengesellschaft

75 Karlsruhe Gartenstrasse 411

Compensator

The invention relates to a compensator for absorbing and compensating for rotary movements in drilling lines.

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Capacitors are used as expansion compensators in drilling lines known for a long time · They essentially consist of one deformable member, e.g. a metallic old pipe, and the permanently connected splash, which are used to insert the compensators in drilling lines.

Although stainless steel has already been used as the material for the column pipes, so-called steel " In any case, bellows will not achieve satisfactory results if the drilling pipes equipped with expansion joints are only or predominantly corrosive and / or

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or aggressive media have to be transported.

For these or similar reasons, expansion joints have also been proposed, their metallic bellows were lined with an inner bellows made of a plastic resistant to corrosive and / or aggressive media. They were plastic bellows in the area of the compensator end flanges with smooth ones through the Flange bores extending therethrough pipe sections, and on the outer flange end faces abutting end collars for provided axial limitation. To increase the compressive strength of the inner plastic bellows is in this arrangement the space between the two bellows can be filled with a barrier fluid, the pressure level of which must be adapted to the internal pressure in the compensator.

Ss is already a special one for inserting in plastic « Axial expansion compensator provided for pipelines has become known, in which one of the end flanges is rigidly connected to a connecting pipe and the other end flange is connected to one is provided from the other side into the connecting tube telescopically insertable drill attachment. Also this one The inner lining of the compensator is a plastic pipe, which is connected to the Sndflanschen in the manner described above connected, but not designed as a bellows. Moving the one Kompensatorendflansohee compared to the

- 3 - ORIGINAL INSPECTED

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Connecting pipe and the other compensator end flange in the axial direction is absorbed by the elasticity of the plastic pipes used as the inner lining.

All of these are prescribed or previously known expansion joints suitable for absorbing and compensating for axial expansions and possibly - within limits - angular movements. Task of The present invention, on the other hand, is the creation of a compensator » which take up and compensate for twisting of individual pipe sections against each other which frequently occurs in pipelines able.

Starting from a compensator with a connecting pipe between the compensator end flanges used to insert the compensator into a pipeline and an elastic conduit pipe or hose, which is enclosed by the connecting pipe and fixed with its ends in the area of the end flanges, made of a synthetic material that is resistant to corrosive and / or aggressive material. t material, the solution to the problem is essentially that the Kompensatorendflanschen are rotatably mounted relative to each other.

The one that enables the compensator end flanges to rotate relative to one another Rotary bearings can be in the area of the end flanges connecting connecting pipes or according to a special

109826/0756

A design feature of the invention can be assigned to one of the end flanges in the form of an axial rotary bearing which acts in the axial direction and which absorbs compressive forces. According to a further feature of the invention, a bearing ring of the axial rotary bearing is connected to the connecting pipe and the other bearing ring is connected to the end flange of the compensator in a rotationally fixed and axially fixed manner, namely the bearing ring removed from the end flange via an inner drill section welded to the associated end flange, the bearing ring connected to the connecting tube engages behind the other bearing ring

In a further expedient embodiment of the invention, an insert made of inner rings can be arranged in the annular space between the conduit pipe and the connecting pipe , which aioh tsw each other with their end faces. support on the bearing rings and are rotatable against each other. Such an insert consisting of individual inner rings, which concentrically encloses the elastic conduit pipe, ensures, without any hindrance, a perfect rotatability of the Kompensatorendflan-Bchen against each other and also supports the elastic conduit pipe when it is subjected to internal pressure from eicher. ·

In the following, the invention will be described in more detail with reference to an embodiment shown in the accompanying drawing. . ''

109826/0756

ORIGINAL INSPECTED

The compensator designated in its entirety by 10 is shown partly in half-section and partly in side view. The ¹ compensator consists essentially of the end flanges 11,. 12, a conduit pipe 13 made of plastic, an insert which concentrically surrounds the conduit pipe in the area between the end flanges and consists of coaxially adjacent inner rings 14t, a connecting pipe 15 which in turn concentrically encloses the inner rings, and an axial rotary bearing 16 connecting each end of the connecting pipe with an end flange, 17th

The axial rotary bearings 16, 17 are designed as ball bearings with bearing rings 18, 19 or, 20, 21. In each case a bearing ring 18, 21 of each pivot bearing is welded to a respective end of the connecting pipe fixed and the associated Kompensatorendflansch arranged directly adjacent .. The respective remote from the associated Kompensatorendflansch bearing ring of a (each pivot bearing 1st via a respective pipe section 22, 23, which in In the direction of the associated flange 11, 12, axially through the other bearing ring 18, 21 and into the respective facing bore, firmly welded to the associated compensator end flange with these bearing rings 19 »20 connected, the inner rings are arranged coaxially to one another, in such a way that they meet one another or

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support on the bearing rings mentioned, but are freely rotatable against each other. The line pipe 13 extends over the entire length of the compensator and rests with its outer surface on the inner surfaces of the pipe sections 22, 23 or the inner rings 14 connecting the bearing rings 19 »20 to the compensator end flanges. The conduit pipe is designed at its ends like a flange with outwardly directed collars 24 »25, which extend ^{radially outward in the manner of ring seals on the Au 8} ""gene surfaces of the compensator end flanges 11, 12 and axially limit the overall arrangement. The screw holes 26, 27 in the end flanges 11, 12 are used to insert the compensator 10 into a pipeline (not shown) by means of clamping screws (also not shown)

The compensator illustrated in the drawing is for exclusive use for absorbing and compensating for rotary movements in a pipeline. The axial rotary bearings 16, 17 allow a relative rotation of the two Kompensatorendflanschen to each other in a determined by the elasticity of the pipe Dimensions. The inner rings which radially support the conduit pipe can follow the rotary movement as desired. In in the axial direction, on the other hand, tensile, compressive or bending forces are applied from the flanges via the axial bearings the connecting pipe transferred and received by this.

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Claims (4)

Claims 1. / Compensator for absorbing and compensating for rotary movement in pipelines, with a connecting pipe between the compensator end flanges used to insert the compensator in a drilling pipe and an elastic conduit pipe enclosed by the connecting pipe and fixed with its ends in the area> λ of the end flanges or Hose made of a plastic resistant to corrosive and / or aggressive media,
characterized, that the Kompensatorendflanschen (11, 12} are rotatably mounted relative to each other. 2. Compensator according to claim 1,
characterized, that at least one of the end flange (11, 12) is an axial Axial rotary bearing that absorbs tensile or compressive forces in the direction (16, 17) is assigned. '» 3. Compensator according to claim 2,
characterized, that a bearing ring (18, 21) of the axial rotary bearing (16, 17) with the connecting tube (15) and the other bearing ring (19 » 20) is non-rotatably and axially connected to the end flange (11, 12). 109826/0766 4. Compensator according to claim 3 »
characterized, that the bearing ring (19, 20) via an inner pipe section (22, 23) with the End flange is connected, and that the bearing ring (18, 21) connected to the connecting pipe (15) the other bearing? ·, ring behind. 5 «compensator according to one or more of claims 1 to 4 | marked by an insert of inner rings arranged in the annular space between the conduit pipe (13) and the connecting pipe (15) (H)., Which are supported with their end faces on one another or on the bearing rings (19 »20) and against one another are rotatable. ORIGINAL INSPECTED 109826/0756