SU1366763A1 - Pipe connection - Google Patents

Abstract

The invention relates to pipelines and can be applied to the fastening of oil, gas, control and other wells in the oil and gas and mining industries. The purpose of the invention is to increase the reliability of sealing the joint. In the joint, the elastic, retaining and retaining rings are located in a common annular groove, with the retaining ring seated with a preload. 2 hp f-ly. 3 il.

Description

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The invention relates to pipeline transport, in particular to pipe joints, and can be used in casing strings for fastening oil, gas, control wells in the oil and gas and mining industries.

The purpose of the invention is to increase the reliability of the joint due to the fact that the sealing, elastic, retaining and retaining rings are located in a common annular groove and are filled with a self-curing lubricant.

Fig. 2 shows the connection of the pipes, general view; Fig. 2 shows a section A-A in Fig. 1 (the position of the sealing element, the thrust split ring and the inserts in the annular cavity formed when the annular grooves of the coupling and the ends of the pipes are combined); on fig.Z - section bb in figure 2.

The pipe connection comprises a cylindrical sleeve 1. with internal rectangular annular grooves 2 and through rectangular windows 3 located opposite similar grooves in pipes 4 and 5 with external rectangular annular grooves 6 that are wider in width than the annular grooves 2 of coupling 1, in which are installed in series sealing elastic rings 7 and thrust split rings 8,

At the end of the pipe 4, there is a centering inner groove 9, and pipes 5 have an outer groove with an annular groove under the elastic sealing ring 10. The sealing ring 7 and the stop split ring 8 have an outer diameter equal to the diameter of the pipes, and the inner ir diameter of the annular groove. The retaining ring 8 of rectangular section is made cut at an angle to the generator.

In the annular cavity formed as a result of the alignment of the annular studs of the coupling 1 and pipes 4 and 5, a locking ring is installed consisting of a set of rectangular section I1. The through rectangular window 3 of the coupling 1 allows free installation of the locking ring from the segments 11 into the annular groove with necessary tension.

Before connecting the two casing pipes, a self-hardening sealing compound is applied to the inner surface of the sleeve 1. On the pipe 4, the sealing ring 7 and the retaining split ring 8 are installed in the outer annular groove 6. The pipe 4 is inserted into the sleeve 1 until it aligns

annular grooves 2 and 6. The excess sealant composition fills all voids in the casing joints.

After combining the annular grooves 2 and 6 through the through window 3 of the coupling 1, pressing the retaining ring from the groove wall, the segments 11 are pressed with tension, pushing them along the groove until the annular cavity is completely filled and

forming a solid ring, while pressing the sealing ring 7 to the side wall of the groove. The coupling 1 is also connected to the pipe 5, but the sealing ring 10 is pre-inserted into the intended annular groove. A standard of two adjacent embedded elements is placed opposite the middle of the window 3, advancing the entire retaining ring along the annular groove.

When the casing is tensioned, additional axial forces act on the split thrust ring 8, the retaining ring 11 and the sealing ring 7.

Under the action of axial forces, the sealing ring 7 is pressed against the wall of the internal groove of the coupling 1 and provides a guaranteed tightness of the casing.

By applying self-hardening sealing grease after the last tube 4 and 5 solidify, they are fixed under axial load, ensuring the connection is still.

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Claims (3)

1. A pipe connection containing inserts in the annular grooves of articulated pipes, a connecting sleeve with a window, a locking element and sealing rings, characterized in that, in order to increase reliability, it is provided with stop split rings, each of which is placed in an annular groove between sealing ring and embedded elements, and on all contact surfaces nano3, The can seal is a self-curing lubricating compound, while the inserts are made in the form of ring sectors and are installed in a groove with the possibility of axial deformation of the sealing ring. 2, Connection non.l, about tl and - that the mortgages 66763 the elements are mounted closely around the entire circumference of the annular groove, and the junction between adjacent elements in the J-zone of the window is located in the center of the latter. 3. A compound according to claim 2, characterized in that it is provided with a plug, geometrically repeated in the connecting sleeve.