DE2853634B2 - Plug connection for riser pipes for underwater drilling - Google Patents

Description

The invention relates to a plug connection for riser pipes for underwater drilling according to the preamble of claim 1.

As is known, riser pipes - so-called risers - have the task of the drill rods, which is located in them to guide and protect from external influences and also the drilling fluid to the floating drilling unit.

There are riser connectors known that with the help of several locking lever that on are arranged around the circumference of the socket part, braced by means of appropriately arranged collar-like approaches will.

There are also pipe systems (marine risers) known, which consist of individual sections (riser joints), which are connected to one another by rigid connecting elements or screw connections. These Connections only have a flexible connection on the upper or lower part (US Pat. No. 36 Ol 187).

Furthermore, with such connections, clamping rings with movement screws (e.g. DE-AS 12 37 035, DE-OS 20 65 571, US-PS 36 47 245), as well as Klerr.msegmente known, which also allow radial movements (e.g. DE-OS 28 18 125, GB-PS 15 26 239).

Finally, a number of connectors are known which are simpler in structure than the above are described and which make use of features of the preamble of claim 1, for example those described in DE-OS 26 40 198 and US-PS 40 40 264.

The preamble of claim 1 is based on a connection as it is in "World Oil" (Doc. 1973) is shown.

The invention is based on the object of not only locking or releasing the connection simplify, but also to reduce the number of sub-elements and still the ability of the plug-in connection to be cold to improve.

This object is achieved according to the invention by what is specified in the characterizing part of patent claim) Characteristics.

A preferred embodiment results from claim 2.

The advantages of the plug connection according to the invention are the simplification due to the reduction of the sub-elements. A larger circumferential area of the male part of the connection is also covered and thus the holding ability of the connector is significantly improved.

In the drawings, a possible embodiment of the plug connection according to the invention is shown schematically. It shows
F i g. 1 a section through the plug connection,

F i g. 2 shows a cross section through the plug connection.

As shown in the drawings, the male part 2 is in the socket 1 of the connector inserted. Both parts are held together by transversely movable Klemmscgmente 3, of which at least eight are arranged in two superimposed rows in such a way that they can move transversely in grooves 4 of the sleeve 1 and in the locked state of the connector in the grooves 4a of the Insertion part 2 are engaged, with grooves 4 of the sleeve 1 and grooves 4a of the insertion part 2 in their position to match.

The clamping segments 3 are provided with a bore 5 at one end and have at the opposite end At the end of another bore 8 into which the pin 7 of the Gelcnkstückes 6 protrudes movably, wherein in the Joint piece 6 is also a bore 9 is located. In the holes 5 and 9 bolts 10 are used, which in engage the bores 13 of the connecting pieces 11, for assembly reasons of the total of four Connecting pieces U a connecting piece is divided. The connecting pieces 11 are provided with movement screws 12, with the help of which the transverse mobility the clamping segments 3 is achieved via the connecting pieces 11.

Thus, two opposing pins 14 enable the socket 1 and the insert part 2 to be positioned precisely in relation to one another when assembling the connection.

Before the assembly of the sleeve 1 and insert part 2, the clamping segments 3 with the help of Connecting pieces 11 and the movement screws 12 placed in the grooves 4 of the sleeve 1 in such a position, that sleeve 1 and insert part 2 can be easily plugged into one another.

After assembling the sleeve 1 and insert part 2, the clamping segments 3 are on the Connecting pieces U and the movement screws 12 moved transversely inwards until the clamping segments 3 are full are engaged in the grooves 4a of the plug-in part 2. The pin 7 of the joint piece 11, which is in the bore 8 of the clamping segments 3 protrudes movably, it makes it possible that when the clamping segment 3 no blocking occurs.

For this purpose 2 sheets of drawings

Claims (2)

Patent claims: 1. Plug connection for riser pipes for underwater drilling, one end of which as a sleeve and the the other end are designed as a plug-in part, of which the socket part on its inner circumference has at least one groove in which distributed over the inner circumference of the sleeve, by screws radially movable clamping segments are arranged in a corresponding groove on the outer circumference of the plug-in part can be inserted and fixed in this, characterized in that that on the inner circumference of the socket part (1) and on the outer circumference of the plug-in part (2) in the axial direction Two annular grooves (4; 4a) are formed at a distance from one another, in each of which at least four Evenly distributed over the circumference clamping segments (3) are arranged, which on their side The ends have bores (5; 9) into which bolts (10) are inserted, of which the four bolts (10) each adjacent clamping segment ends of the upper and lower row of clamping segments (3) in corresponding bores (13) are used on connecting pieces (11) which are connected to the movement screws (12) and radially through them are adjustable. 2. Plug connection according to claim 1, characterized in that the bores (9) to the lateral ends of the clamping segments (3) in circumferentially displaceable joint pieces (6) with pins (7) are provided, which in corresponding bores (8) of the clamping segments (3) are sliding.