DE1906009U - LINING PIPE AND CONNECTING SLEEVE FOR LINING DEEP HOLE HOLES. - Google Patents

Description

Mannesmann Aktiengesellschaft, Düsseldorf _t Mannesmannufer 1b _#

Liner connection *

The innovation concerns a connection of the casing pipes for Deep boreholes »in which the pipe ends with conical external threads engage in hollow conical internal threads of a socket»

In known connections of the casing used for lining boreholes, screw sockets are used; having either a continuous cylindrical thread or in which the threads are formed hollow cone and one another in the socket center pass "For special requirements ^ z _# B # in the case of using the feed pipes in deep boreholes for development of natural these compounds are not suitable because they for high pressures are not gas-tight »Bs has already been proposed» for pipe connections of this type

between
to arrange filling rings made of plastic in the space / the end faces of the pipe ends in order to achieve a seal.

For the purpose of a gastight casing of the deep wells who "the so-called generally EXfEEMl LINE-CASINGS used _f" where the liners without the use of a connecting sleeve are screwed directly to one another and are provided, the threaded parts of the tubes with inter-engaging sealing surfaces "To reinforce this connection must the pipe ends are thickened by upsetting, but this leads to a considerable increase in costs *

The aim of the innovation is to create a casing connection the gas-tight piping of deep wells carrying natural gas without increased expenditure on manufacturing costs and material guaranteed * This is achieved by the fact that the ends of the pipe sleeves are, according to the new technology, prior to thread cutting, depending on the Wall thickness can be drawn inwards and a thread-free, conical * preferably with a slightly convex curvature have tapering part, which with its outer circum fang presses gas-tight against a thread-free inclined surface of the sleeve ^ To limit the screw connection, the Socket a ring-shaped »zen« on the thread-free inclined surface tric inner protrusion against which the ends of the chuck * - Support pipes »The pipe ends are not upset *

In the drawing, an embodiment of the innovation is shown * - placed"

Fig »1 shows a longitudinal section through the connection and In Fig «2 is for the purpose of better clarification, the sealing part of the connection of a casing pipe with the screw socket in the shown enlarged scale *

The ends of the pipe sleeves 1 and 2 engage with their conical external threads in the hollow-conical internal threads of the 7-thread socket 3 a. Depending on the wall thickness, the thread-free parts 4 "or * 5 of the pipe ends drawn inwards each have a slightly convex curvature and press against the inclined surfaces 6 ″ or 7 of the sleeve »Pie Muffe has a central inner ring 8, against which the end faces 9 "or 10 of the pipe ends are supported *

Protection claims ί

Claims (2)

(New) protection claims 1. Lining pipe and connecting sleeve for lining drilled holes, with tapered external threads on the pipe ends that are not compressed or with tapered internal threads in the connecting sleeve, characterized in that the casing ends each have a thread-free, conical, preferably slightly convex Curvature tapering file (4,5), which presses gas-tight with its outer circumference against a thread-free viewing surface (6,7) of the connecting sleeve. 2. casing and connecting sleeve according to claim 1, characterized in that that the connecting sleeve has a central annular inner projection (8) 3 »Lining pipe and connecting sleeve according to claims 1 and 2, characterized in that the casing ends are drawn inwards depending on the wall thickness.