JPS59137692A - Connector of producing pipe for oil well - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connection device inserted into an oil well production pipe which serves several functions, such as a plug receiver, a stop means, a means for lateral directing of fluid, and a membrane against abrasion.

In order to perform these functions, the connecting device must be provided with a treated inner surface and/or a diverse and complex inner contour that is difficult to fabricate and unique to the intended function. This not only results in high manufacturing costs, but also means that a large amount of connection equipment must be stocked close to the site. Furthermore, it is difficult to control the quality of these connecting devices, resulting in uneven treatment of the internal surfaces of the connecting devices.

According to the invention, the sleeve has a cylindrical sleeve with an inner shoulder facing the first end of the sleeve and a radial inner contour coaxial with the sleeve and designed for the function to be performed by the connecting device. , and inserted into the sleeve so that the shoulder and the first part of the sleeve
A production pipe connection device for an oil well is provided, consisting of at least one contoured ring which is clamped longitudinally between clamping rings arranged at the ends.

A plurality of contouring rings can be installed between the shoulder and the tightening ring. It is thus possible to obtain complex internal contours in the connecting device by vertically arranging several contouring rings, each easily produced. Furthermore, by separately stocking the sleeve and copying ring, a desired combination can be obtained as needed. Furthermore, depending on the ring, special materials suitable for the processing conditions of these rings may be used.

The clamping ring may be a special ring mounted on the sleeve, but is preferably provided as a threaded end of an adjacent output tube element which is screwed onto the first end of the sleeve.

At least a portion of the contoured ring may also be provided with locking means with another link or adjacent component formed on the shoulder.

In this way assembly errors and the possibility of rotational movements of the profiling ring can be avoided.

radial outer circumference K, O- of at least one contouring ring
A ring seal is provided.

Embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which: FIG.

The integral connector 1 shown in FIG.
Fixing recess 2, upper bearing machined surface 3, lower bearing machined surface 4,
It is provided with an orifice 5 extending through the wall of the connecting device 1 and opening into the gap between the upper and lower bearing surfaces 3 and 4, through which a control fluid can flow. This connector 1 has an oil well-shaped female threaded part 6 at its upper part and an oil well-shaped male threaded part 7 at its lower part. A flow tube 8 having an oil-well-shaped female threading part 9 at the top and an oil-well-shaped male threading part lO at the bottom connects the threading part 6 and lO with each other to the connecting device 1. be combined. Similarly, the upper part has an oil well-shaped female thread cutout 12, and the lower part has an oil well-shaped cutout part 12. A flow tube 11 with an external thread 13 is connected to the fitting l by mutually engaging the threads 7 and 12.
is combined with

In the embodiment of the invention shown in FIG. 2, the three elements 1.8 and 1l which make up the output tube of FIG. 1 are replaced by two elements 14.15. Element}1
4 is a flow tube similar to tube 8. At its upper part, a female threaded part l6 of the same type as the threaded part 9 is provided, but at its lower part, a normal cylindrical male threaded part 17 and an O-ring seal l8 are provided.

On the other hand, the element 15 has an oil-well-shaped male threaded part 19 at its lower part, which is the same as the threaded part 13, and a normal cylindrical female threaded part 20 at its upper part. It engages with the cutout 17 to join both elements }14 and 15 together.

The element 15 has a lower thick-walled cylindrical part 2l forming a flow tube inside thereof, and an upper thin-walled cylindrical part 22, the difference in thickness between the two cylindrical parts 21 and 22 forming an annular shoulder 23. are doing. The thin upper cylindrical portion 22 includes an orifice 24 similar to the orifice 5 . A series of rings are installed within the cylindrical portion 22 . These rings include a ring 25, which has a cylindrical part 26 having an inner diameter equal to that of the element 14, and a truncated conical part 27 which forms one corner of a recess 28 similar to the recess 2. The bottom surface of the recess 28 is provided by another ring 29. The other edge of the recess 28 is also provided by a third ring 310 frustoconical portion 30 . The third ring 31 has a cylindrical part 32, which is connected to the cylindrical part 2.
A machined bearing surface with an inner diameter slightly smaller than 6 is formed. A small circular, cylindrical ring 33 having an inner diameter larger than the cylindrical portion 32 has an orifice 34 communicating with the orifice 24. A cylindrical fifth ring 35 forms a machined bearing surface having an inner diameter slightly smaller than that of the cylindrical portion 32. The third ring 31 and the fifth ring 35 each have O-ring seals 36 and 37 on their outer peripheries, and these seals ensure leakage prevention between both rings and the thin inner surface of the upper cylindrical portion 22 of the element 15. ing.

ζ These contouring rings 35j33, 31, 29 and 2
5 is inserted into the cylindrical part 22 and the ring 35 abuts against the annular shoulder 23. On the other hand, upon mutual engagement of the threads 17 and 20, the ring 25 is pushed towards the shoulder 23 by the thread l7, so that the thread l7 performs the function of a clamping ring for all contouring rings.

In the embodiment shown in FIG. #I3, the element 14 and the cylindrical portion 21
Since it is assumed that there is no need for a flow tube consisting of a flow tube, it is possible to use short elements }38 and 39 in place of both elements 14 and 15 in FIG. 2, respectively. However, regarding the threaded part, the same reference number 16j is used in Fig. 3.
17, 19 and 20 are attached. Element 39 is
A short thick cylindrical portion 40 and a thin cylindrical portion 2 corresponding to the thin cylindrical portion 22 of FIG. 2 and forming a shoulder 42 on the cylindrical portion 4o.
2. The embodiment of FIG. 3 also assumes that only one machined bearing surface is required and that no fluid inlet orifice is required. Therefore, in this embodiment, a ring 25 having a lower truncated conical part that gives one green color to the recess, a ring 29 that provides the bottom surface of the recess, and an upper truncated conical part and a lower truncated conical part that give the other green color to the recess. a ring 43 having a cylindrical processed bearing inner surface and a ring 44 having an O-ring seal 45 on the outer periphery.
, and a spacer ring 46 are used.

The rings 25, 29, 43 and 44 of FIG. 3 are also shown in the embodiment of FIG. However, in the embodiment ζ, the ring 46 of FIG. 3 is replaced by an anti-packing link 47 and a spacer/stop ring 48 having an anti-socket groove.

Figure 5 shows the five contouring rings 25 used in Figure 2.
, 29.31.33 and 35.

As is clear from FIG. 5, these rings are provided with projections such as K49 and recesses such as 50 at their respective longitudinal ends. This provides a different handle hole joining system for each ring and prevents rings from being misplaced during assembly. At the same time, ring 35 is also fitted to shoulder 23K via a similar system to prevent rotation of the ring.

Although several examples of contouring rings have been shown above, contouring rings with extremely deformed shapes can be used as needed, and the present invention provides highly accurate and complex contouring rings that could not be anticipated with the prior art. It is possible to provide a suitable joint profile.

As described above, the present invention is much easier and more reliable to manufacture, and since it consists of multiple elements, it can be assembled as needed from the component parts of the stock, thus reducing the amount of stock required. A production pipe connection device for an oil well can be obtained.

4. BRIEF DESCRIPTION OF THE DRAWINGS: Figure 1 is a longitudinal half-sectional view showing three successive conventional elements of a production pipe spaced apart from each other; Figure 2 shows a production pipe connection device according to the invention; A longitudinal half-sectional view showing two successive elements of the output tube spaced apart from each other, including an exemplary embodiment and performing the same function as the three conventional elements of FIG. 1; FIG. FIG. 4 is a longitudinal half-section of two further continuous elements spaced apart from each other according to a further embodiment of the production pipe connection device according to the invention; FIG. a longitudinal half-sectional view showing an assembly of different contouring rings according to another embodiment;
and FIG. 5 is a perspective view of the IJ spout and contouring ring assembly of the output pipe connection device according to the present invention, before the ring is inserted into the sleeve.

14... Output pipe element, 17... Threaded end, 2
0...Sleeve first end, 22.41...Sleeve,
23.42...Inner shoulder, 25, 29, 31, 33, 3
5, 43.44, 46.47.48... Contour forming ring, 36.37j45... 0-Lisigjil, 49.
50... Assurance means.

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Claims (4)

[Claims] 1. an inner shoulder (23,
a cylindrical sleeve (22.41) with a cylindrical sleeve (22.41) coaxial with said sleeve and having a radial inner contour designed for the function to be performed by the connecting device;
at least one contouring ring (J41) inserted into the sleeve and tightened longitudinally between the shoulder (23.42) and the tightening ring (17) located at the first end (20) of the sleeve;
25, 29.31j33.35, 43, 44.46.4
7.48) An oil well production pipe connection device characterized by comprising: 2. Claim 1, characterized in that said clamping ring is provided as a threaded end (17) of an adjacent output tube element (14) which is screwed onto the first end (20) of the sleeve. connection device. 3. At least one contouring ring (31, 35, 44
) has an O-ring seal (36, 37) on its radial outer circumference.
．． 45) The connecting device according to item 1 or 2 of the patent application. 4. Multiple contouring rings (25, 29, 31, 33 .
35), characterized in that at least some of them have at each longitudinal end means (49.50) for engagement with an adjacent component formed in another ring or shoulder A connecting device according to the claims.