DE1043243B - Drill pipe connection - Google Patents

Description

According to the current state of the art, it is easily possible, which pipes for the most diverse Purposes find use to connect. This can be done through threads on both Pipe ends are attached, or by bayonet fittings. The requirements placed on pipe connections are provided in which the pipes have to be sunk using the drilling process, but are so, that a solution for a pipe connection must be found in which the arrangement of the pipe connection the outside diameter of the pipe is increased as little as possible in order to be able to sink the pipe easily and Also, if possible, no protruding parts should be provided in the interior of the pipe in order to facilitate the clearing of the drilling material as light and simple as possible. So when it comes to pipes with a diameter of 400 mm and larger so that they are tight when filled with air or water of about 5 atmospheres and the mechanical forces when drilling and pulling pipes are properly absorbed the compounds customary up to now are not able to cope with these conditions.

In the present case, the inventive concept is based on the fact that for the connection of two pipes the effect of two pairs of mutually conical jaws is used. The process at Connecting the pipes is divided into two operations. The first interlocking of the two tubes is there the connection has a resistance to twisting, the second lock is used to secure the connection of the To make pipes resistant to tension and compression.

The concept of the invention is explained in more detail in the drawing. (In Fig. 1, a pipe jacket piece is in of the settlement.)

An upper tube B should be placed on the lower tube A in such a way that the above conditions are met. For this purpose, both the pipe A and the pipe B receive a number of cams a on their outer walls, which z. B. can consist of individual welded plates made of steel or any other hard material (see. Fig. 1). These cams are evenly distributed around the circumference of the tube and of a size that the space b between the individual cams corresponds to the width of these welded-on plates α. So if the two pipe ends are placed on top of each other so that cams sit on cams and space on space, then only plates c made of steel or some other hard material have to be inserted and held in these spaces, then the tubes can no longer be rotated against each other. This is done by a number of lamellae c, which are lined up on spring strips d at such a distance that this drill pipe connection

Applicant:

Heinz Löffler,
Frankfurt / M.-Eckenheim, Hügelstr. 30th

Heinz Löffler, Frankfurt / M.-Eckenheim,
has been named as the inventor

Lamellas fill in the spaces b between the individual cams in both tubes (see Fig. 3). The spring strips d with these slats are installed so movably in a sleeve e, which will be described in more detail below, that they can be easily rotated horizontally.

In order to still be able to achieve the high tensile strength connection of the two pipes, the cams welded to the pipe ends are held by the aforementioned sleeve e , which in turn also receives cams / welded inside in the same way (see Fig. 2). Pushing the bushing e d, together with the movable sleeve in the grooves i built-in spring bands z. B. on the lower end of the pipe is done in such a way that the spring band is rotated beforehand so that the lamellas lined up on the spring band come to stand above or below one another with the cams welded on the inside of the sleeve. In this way, on the other hand, the spaces between the cams of the sleeve and those of the lamellae of the spring strips also lie on top of one another. Thus, the sleeve e with the spring straps d can be pushed over the lower end of the pipe, the cams α welded onto the pipe end passing through the spaces inside the sleeve. Now the upper end of the pipe is also pushed into the empty spaces in the sleeve from above. All that is needed now is a small turn of the sleeve e - the spring strips d do not rotate with it (see Fig. 4, section H-II) - and the tensile strength connection is established in that the cams f welded onto the inside of the sleeve Hold the cams α together on the pipe ends from above and below (see Fig. 4 and S). Rotation of the tubes against each other is also no longer possible because the lamellae on the spring strips d prevent this.

All that is now required is the pressure-tight sealing of the pipes. The «e is in the way crrc ::!: ': ..

iOJ 67S / 46

that rubber inserts g are installed in the end faces of the pipe ends. These rubber rings lie tightly on top of each other and still have to be pressed against each other. The pressing takes place in that the cams f of the sleeve e receive a bevel as well as the cams α of the two tubes, so that by turning the sleeve e a wedge effect is achieved which presses the two rubber rings g onto one another. It is therefore only necessary to hold the sleeve e in its position with a few locking screws h or the like, then the pipe connection is torsion-resistant, tensile and pressure-resistant, and airtight.

Claims (2)

Patent claims: 1. Drill pipe connection which can be accommodated within the normal pipe wall thickness, characterized in that the two pipe ends (A, B) have outer cams (a) which are connected in a tensile manner by slightly turning a sleeve {e) with internally welded cams (f) are, where to achieve a wedge action on rotation of the sleeve (e) the welded cams (a, f) with a slightly conical abutment are provided, and in that horizontally movable for preventing rotation of the tubes against each other in the sleeve (e) spring strips (d ) are installed with welded-on lamellas (c), which fill the gaps between the cams on the pipe ends, one above the other. 2. drill pipe connection according to claim 1, characterized in that the two end faces the pipes contain a sealing rubber insert. Considered publications:
U.S. Patent Nos. 2,165,163, 2,245,847;
British Patent No. 433 495. 1 sheet of drawings © SO »678/46 11th SS