Connections for expanding pipes

FIELD: machine building.

SUBSTANCE: connection consists of first and second expanded tubular elements each containing multitude of bent sheets. Each sheet has concave and convex surfaces and a place of connection whereat one of multitude of bent sheets is attached to another from multitude of bent sheets, and multitude of connecting elements each positioned on at least one of multitude of bent sheets. The first and the second expandable elements can be expanded and compressed. Multitude of connecting elements of the first tubular element interacts with multitude of connecting elements of the second tubular element.

EFFECT: increased strength and pressure tightness of connection.

33 cl, 28 dwg

 

Prerequisites to the creation of inventions

The present invention relates generally to expandable tubular elements. In particular, the described implementations relate to compounds and methods that are used to connect the expandable tubular elements.

When connecting segments, channels and tubular butt for transporting a fluid medium, such as a fluid medium under pressure, for forming connections between pipes and tubular elements typically use a typical threaded connection. In oil country tubular goods typically use such threaded connections for connecting adjacent sections of casing or pressure pipe. These threaded connections usually include a covered thread executed on a pin element, and covering the carving done on the box-shaped element. This threaded connection may be accomplished by rotation of the pin element relative to the box-shaped element, and covered carving and covering the threaded tubular elements are engaged.

Essentially important part of any connection is the creation or preservation of seals inside connections to ensure the integrity of the channel for the fluid and prevent leakage. Usually connections are constructed as linking the elastomeric seal or the seal is metal to metal". The seal is metal to metal" have the advantage that they do not require gaskets or other additional sealing devices, which usually have to periodically replace when connecting and disconnecting connections. Metal connections are formed when the contact pressure between two metal surfaces exceeds the pressure of the fluid intended for sealing. This contact pressure can be created by executing the connection. On the other hand, the advantage of elastomeric seals is that they do not require constant contact pressure between the metal surfaces of the pin and box connection elements in order to maintain air-tightness.

Recently, however, have been developed pipe oil country tubular goods, which can radially expand relative to their original diameter after installation for the intended application. These tubular elements can be enhanced with the use of elastic and/or plastic deformation. When using the elastic deformation of the deformation of the tubular elements is usually reversible, and the deformation is not permanent. On the other hand, when using plastic deformation the deformation of the tubular elements is constant. When such deformation usually the thread I may not preserve the integrity and/or strength in the connection between the expandable tubular members. Moreover, conventional thread may not even provide the connection between the expandable tubular members. Accordingly there is a need for connection that can be used for connecting and maintaining a connection between the expandable tubular elements, such as during expansion of the tubular elements.

The present invention is to create an expandable tubular connection. The connection includes a first expandable tubular member and the second expandable tubular member. Each of the first expandable tubular member and the second expandable tubular member has an axis drawn through it, and includes many of curved sheets, and each sheet includes a concave inner surface and a convex outer surface, and a lot of curved sheets are placed next to each other around an axis, a place of connection, in which one of the many curved sheets attached to the other of the sets of curved sheets, and lots of connecting elements, each of which is placed on at least one from a set of curved sheets. The first expandable tubular member and the second expandable tubular element arranged to expand from a first diameter to a second, larger diameter and compression of the second, the larger diameter to the first diameter. Further, many of the connecting elements of the first tubular element arranged to interact with many connecting elements of the second tubular element.

In another aspect disclosed here, the embodiments relate to an expandable tubular coupling having a coupling connection on the axis through him. The element includes a lot of curved sheets, each of which has a concave inner surface and a convex outer surface, and a lot of curved sheets are placed next to each other around an axis, a place of connection, in which one of the many curved sheets attached to the other of the sets of curved sheets, and lots of connecting elements, each of which is placed on at least one from a set of curved sheets. Many connecting elements are arranged for connection with another set of connecting elements located on another expandable tubular element, and an expandable tubular element arranged to expand from a first diameter to a second, larger diameter.

In another aspect disclosed here, the embodiments relate to a method of manufacturing an expandable tubular element. The method involves the application of many of Zolotykh sheets, each of the sets of curved sheets includes a concave inner surface and a convex outer surface, placing on the expandable tubular member of a set of connecting elements, each of the multiple connecting elements located on at least one from a set of curved sheets, and attaching a variety of curved sheets to each other at least at one connection point, so a lot of curved sheets is located next to each other around the axis, and an expandable tubular element arranged to expand from a first diameter to a second, larger diameter.

Further, in another aspect disclosed here, the embodiments relate to a method of connection of the first expandable tubular element to the second expandable tubular member. The method includes applying a first expandable tubular member and the second expandable tubular element, each of which contains a lot of curved leaves, each from a variety of curved sheets includes a concave inner surface and a convex outer surface, so that the multitude of curved sheets is located next to each other around the axis of the expandable tubular member. Each of the number of these first expandable tubular member and the second razsirjamo the tubular element also contains a place of connection, which attaches one of the many curved sheets to the other of the sets of curved sheets and lots of connecting elements, each of which is located on at least one of the set of curved sheets. The method also includes the interaction of multiple connecting elements of the first expandable tubular element with many connecting elements of the second expandable tubular element.

Other aspects and advantages of the invention will become apparent from the following description and the accompanying claims.

The invention is illustrated in the drawings, where:

On figa and 1B shows multiple views of an expandable tubular element according to unfold here options for implementation;

figure 2 shows a view in cross section of an expandable tubular element according to unfold here options for implementation;

on figa and 3B shows planar views in cross section of an expandable tubular connection according to the disclosed here options for implementation;

figure 4 shows a flat view in cross section of an expandable tubular connection according to the disclosed here options for implementation;

figure 5-7 shows multiple types of curved sheets according to the disclosed here options for implementation;

on Fig-13 shows the multi-species is Zolotykh sheets according to the disclosed here options of implementation;

on Fig-16 shows multiple types of curved sheets according to the disclosed here options for implementation;

on Fig shows a flat view in cross section of an expandable tubular connection according to the disclosed here options for implementation;

on Fig shows a view in section of an expandable tubular connection according to the disclosed here options for implementation;

on Fig shows a flat view in cross section of an expandable tubular connection according to the disclosed here options for implementation;

on Fig shows a flat view in cross section of an expandable tubular connection according to the disclosed here options for implementation;

on Fig shows a flat view in cross section of an expandable tubular connection according to the disclosed here options for implementation;

on Fig shows a flat view in cross section of an expandable tubular connection according to the disclosed here options for implementation;

on Fig shows a flat view in cross section of an expandable tubular connection according to the disclosed here options for implementation;

on Fig shows the end view of the extensible tubular elements according to the disclosed here options for implementation;

on Fig-28 shows the many stylistic types of liners according to the disclosed here options for implementation.

Next will be described the in detail with reference to the accompanying figures of specific implementations of the present description of the invention. Similar elements in the various figures will be designated for consistency similar digital items. Further, in the following detailed description of the implementation options of the present description, numerous specific details are outlined in order to achieve a more profound understanding of the invention. However, the person skilled in the art should be understood that the disclosed here, the embodiments can be implemented without these specific details. In other instances, well-known symptoms are not described in detail to avoid unnecessarily complicating the description.

In one aspect disclosed here, the embodiments relate to an expandable tubular connection and the method of connecting expandable tubular elements together. An expandable tubular element comprises multiple curved sheets, of which each sheet has a concave inner surface and a convex outer surface. These sheets have a linear surface such as a smooth surface, or non-linear surface, such as a screw surface. The sheets are then joined to each other by using and by joining places, so that the sheets are placed around the axis of the expandable tubular member. This expandable tubular element can russiathis is from a smaller first diameter to a larger second diameter.

Many connecting elements located on multiple sheets. The connecting elements can be formed on the sheets, or the connecting elements can be manufactured separately and attached (e.g., attached) to the leaves. Each of the connecting elements located on one or more sheets on which the connecting elements can be located on top or towards the end of the leaves and/or can be located on the inner or outer surface of the sheets. The connecting elements from one expandable tubular element arranged for engagement with the connecting members of another expandable tubular element.

As described here, the present description of the invention can be used in the production of hydrocarbons, such as oil and gas. For example, the present invention can be used in water wells, dewatering wells, monitoring and remediation wells, tunnels, mines, pipelines and other similarly known uses of the pipes. In addition, the present description relates to tubular elements. In this case, the term "tubular" refers to any structure that may generally round, generally oval, and/or in General elliptical. In addition, these tubular elements mo the ut to be completely solid, or may include a perforation, such as is found in Pescasseroli, or these tubular elements may be continuous, as a continuous coiled tubing. Accordingly, these patterns can be incorporated into the embodiments described herein.

On figa and 1B shows multiple views of an expandable tubular element 101 according to the disclosed here options for implementation. On figa shows a view in cross section of an expandable tubular element 101. On FIGU shows a perspective view of the expandable tubular element 101. In this embodiment, the implementation of the expandable tubular element 101 includes only two bent sheet 121. However, a person skilled in the art will understand that the present description of the invention is not limited to this, and an expandable tubular element may have any number of curved sheets.

Each of the curved sheets 121 includes at least one concave inner surface 123 and at least one convex outer surface 125. Sheets 121 are placed and connected to each other so that the sheets 121 to form an expandable tubular element 101 around the axis 100. In this form curved sheets 121 may form an arc or spiral around the axis 100 of the expandable tubular element 101. In addition, the sheet 121 can be connected with each other is at one or more places accession 141 (further described below), sheets 121 can deflect radially inside or out, slide and move relative to each other for expanding a tubular element 101 can increase and decrease the diameter (i.e., to expand or contract in size).

Figure 2 shows the cross-section of an expandable tubular element 201 with skipped through it, the axis according to the disclosed here options for implementation. An expandable tubular element 201 includes a lot of curved sheets 221 attached to each other using a variety of places of attachment 241. In particular, in this embodiment, the implementation of each connection point 241 is used to connect two curved sheets 221 to each other. The attachment points 241 may include one or more of the following materials, devices and/or methods: connecting material, such as a welding material, adhesive material, the brazing alloy and/or soft solder, for connecting curved sheets 221; elastomeric material, such as elastomer or elastomeric strip to attach the curved sheets 221 to each other; a mechanical fastening product such as the use of the clamp for the connection of curved sheets 221 between them; to the interference fit, such as the use of mutual influence between the curved surfaces Lys is s 221 for connecting curved sheets 221 to each other; and/or can include any other method or material known in the art, for connection of curved sheets of each other.

Further, as shown, the sheets 221 may have an uneven thickness in order to facilitate expansion and contraction of the expandable tubular element 201. In this implementation, the thickness of each sheet 221 is reduced from the outer side of the expandable tubular element 201 when moving radially inward relative to the axis 200. While expansion of the expandable tubular element 201 curved sheets 221 can slide relative to each other when each of the sheets 221 extends radially outward. In contrast, during the narrowing of the expandable tubular element 201 curved sheets 221 can slide relative to each other and/or move relative to each other when each of the sheet 221 is contracted radially inward. Other expandable tubular elements described in the patent application U.S. No. 60/832530 and in PCT application number PCT/US07/06193.

On figa and 3B shows planar views in cross section of an expandable tubular connection according to the disclosed here options for implementation. Expandable tubular connection 391 includes two expandable tubular element 301A, B, which figa shows the expandable tubular elements 301A, B, connected the s with each other, and figv shows the expandable tubular elements 301A, B connected to each other.

Expandable tubular elements 301A, B each include an array of curved sheets 321A, V and many connecting elements A, B. As shown, each coupling element A, B is located on one of the curved sheets 321A, V respectively. In particular, in this embodiment, the implementation of each coupling element A, B is located on the end of one of the curved sheets 321A, B. Further, the connecting elements A, B can be placed on curved sheets 321A, V, so between the connecting elements A, B respective expandable tubular elements 301A, V a gap. For example, as shown, the connecting elements A can be placed on alternating curved plates 321A so that between the connecting elements A expandable tubular element 301A is formed the gap.

As such connecting elements A expandable tubular element 301A can interact with connecting elements V expandable tubular element V. For example, the connecting elements A, B can be aligned, and tubular elements 301A, B can rotate and/or move in other ways (such as radial or longitudinal movement) relative to the other the other. The connecting elements A, B can then interact with each other, forming 391 connection between the expandable tubular elements 301A, B. This compound 391 may be used to bond the expandable tubular elements 301A, V among themselves in addition to getting gear that can withstand the working pressure in the tubular elements 301A, B and/or to receive the seal between the tubular elements 301A, B. Next, this compound 391 may be used to allow the curved sheets 321A, W expandable tubular elements 301A, B to slide and move along each other at a time when the expandable tubular elements 301A, B expand and contract, while maintaining the strength of the connection 391. In addition, this connection can also be used to allow the connecting elements A, B be rotated relative to each other during expansion and contraction of the extensible tubular elements 301A, B, while maintaining the strength of the connection 391.

Figure 4 shows a flat view in cross section of an expandable tubular connection 491 according to the disclosed here options for implementation. Expandable tubular connection 491 includes an expandable tubular element E connected to the expandable tubular element V. Each of the extensible trobc the mentioned elements A, V has accordingly a lot of curved sheets A, B. Further, as shown, the connecting elements A, B are respectively curved sheets A, B. In this embodiment, the implementation of each coupling element A, B is located on the end of one of the curved sheets A, B.

Like the connection 391 shown in figa and 3B, the connection 491 figure 4 is the connecting elements A, B located on curved sheets A, B, so between the connecting elements A, B respective expandable tubular A, V a gap. However, in this embodiment, the implementation rather than the location of the connecting elements A. V on alternating curved sheets A, B connecting elements A, B can be placed on every third curved sheet A, V. When the expandable tubular elements A, B are connected, the connecting elements A, B still interact, forming and reinforcing the connection 491. For example, as shown, at the location of the connecting elements A, B at the ends of the curved sheets A, B each connecting element A, V may adjoin or be located adjacent to the ends of two curved sheets of A, B located against each other expandable tubular A, M.

Although in the above embodiments, i.e. monitoring) reference and expandable tubular elements are shown as having connecting elements, located on alternating sheets, or on every third curved sheet, a person skilled in the art will understand that the present description of the invention is not limited to this, and in other embodiments of the connecting elements can be located in another arrangement of curved sheets. For example, in one embodiment, the implementation of the connecting elements can be placed at every fourth sheet, and connecting elements can adjoin the ends of the three leaves opposite expandable tubular element. Further, in another embodiment, the implementation of the connecting elements can be placed on alternate sheets in addition to the presence of other connecting elements located on every third or fourth leaf. As such, in these embodiments of the connecting elements can be arranged and are located at the leaves of the expandable tubular elements so that the connecting elements interact to form the connection between the expandable tubular members. In addition, to increase the strength of the interaction between the connecting elements leaves with connecting elements located on them, can be attached to or made with leaves, not having placed them on the connecting elements.

Figure 5-7 shows multiple types of curved sheets 521-721 according to unfold here options for implementation. Each curved sheet 521-721 includes a coupling element 531-731. In particular, in this implementation, each of the connecting elements 531-731 is located on the end of each of the curved sheets 521-721. As shown, each coupling element 531-731 may take the form of a dovetail for improving engagement between the connecting elements 531-731 when connecting expandable tubular elements together. When using connecting elements, which have the shape of a swallow's tail, the connecting elements opposite the expandable tubular elements can interact with each other, with the connecting elements of similar shape, placed on curved sheets that complement expandable tubular elements.

Figure 5 and 7 connecting elements 531, 731 have a trapezoidal shape in which the narrower end of the connecting elements 531, 731 is located on curved sheets 521, 721. The connecting element 531, located on a bent sheet 521, may also have made it groove 533. In this embodiment, the implementation of a groove 533 is made in the end, particularly in the larger end of the connecting element 531. The groove 533 may be used for the power connection 531, such as removing the voltage when the connecting element 531 communicates with other connecting elements of the other expandable tubular element, or can be used otherwise, so as to place the seal in the expandable tubular element or create interference with other expandable tubular element.

Next, figure 6 connecting element 631 may have a triangular shape, in which the narrower end of the coupling element 631 may be placed on a bent sheet 621. Further, the end of a bent sheet 621 may have made a groove in it, which can then be posted by the connecting element 631 in the groove of the curved sheet.

As described above, the connecting elements are arranged on curved sheets expandable tubular elements for forming an expandable tubular connection. As such connecting elements can be placed on curved sheets using different methods. For example, in one or more variants of realization of the connecting elements can be attached to curved sheets expandable tubular elements. As shown in Fig, the connecting element 831, having a trapezoidal shape, may have a narrower end of the coupling element 831, attached to the end of a bent sheet 821. As shown in Fig.9,the connecting element 931 may have made a groove in it, moreover, in the groove of the connecting element 931 then insert the end of a bent sheet 921 for connection to the connecting element 931.

Further, the curved sheets expandable tubular elements may have characteristics, formed in them or attached to them, which facilitates connection of the connecting elements with curved leaves. For example, as shown in figure 10-13, to the interference fit between the connecting elements 1031-1331 and consolidating signs of curved sheets 1021-1321 can be used to attach the connecting elements 1031-1331 and curved sheets 1021-1321. Figure 10 on one or more of the side surfaces of the bent sheet 1021 can be done grooves, and a connecting element 1031 may further have a shape corresponding to the grooves in the sheet 1021, also made in it. In this case coupling element 1031 can connect with a curved sheet 1021 using landing with an interference fit, or other methods known in the art (for example, landing with slip).

Figure 11 numerous leaves 1121 adjacent to each other, can be used in conjunction with appropriate contours and grooves made in curved sheets 1121. The connecting element 1131 may have a shape corresponding to both curved sheets 1121 located next to each other, and connecting the element 1131 may adhere to both curved sheets 1121 using landing with tension.

On Fig and 13 instead of forming grooves and fixtures in curved sheets (similar to that shown in figure 10 and 11) to curved sheets 1221, 1321 may be attached guides 1227, 1327, with the aim of landing the interference fit between the curved sheets 1221, 1321 and connecting elements 1231, 1331. On Fig curved sheet 1221 has many guides 1227 attached on both sides, and the connecting element 1231 has a shape corresponding to the guide rails 1227 made here. On Fig curved sheet 1321 has only one guide attached thereto, and the connecting element 1331 has a shape corresponding to one of the guide 1327 made here.

In addition, instead of forming the grooves and attach the rails to curved sheets with the aim of obtaining landing scarcely possible to bend the edges of curved sheets to obtain landing with tension. For example, as shown in Fig-16, edges, or parts thereof, curved sheets 1421-1621 can be bent, forming an interference fit fasteners 1431-1631. On figa and 14C edge of the curved sheet 1421 bent in one direction for joining the coupling element 1431. The connecting element 1431 has a shape corresponding to Sinaloa edge of the curved sheet 1421, in which the connecting element 1431 may then be placed on a bent sheet 1421. the and figa and 15V edge of the curved sheet 1521 bent in different directions, in particular, in two directions, for joining the coupling element 1531. The connecting element 1531 has made it a shape corresponding to Sinaloa edge of the curved sheet 1521, and the connecting element 1531 may then be placed on a bent sheet 1521. Next, Fig instead of using a single bent sheet are bent edges of several curved sheets of 1621, and the edge of each curved sheet 1621 bent in one direction, the opposite edge of the other of the curved sheet 1621. The connecting element 1631, meanwhile, has made it a shape corresponding to the curved edges of curved sheets of 1621.

When attaching the connecting element to the curved leaves of the connecting elements can be attached to curved sheets or connecting elements may instead be able to slide or move relative to the curved leaves (as in the case when the connecting elements using an interference fit to attach to curved sheets). If the connecting elements are attached to curved sheets, for the connection of connecting elements to curved sheets can be used a variety of materials and methods. The connection may include one or more of the following materials, devices and/or methods: connecting material such as a welding material, the adhesive material, the brazing alloy and/or soft solder); elastomeric material; mechanical fixing product; means landing with an interference fit; and/or may include any other method, mechanism, or material known in the art.

Further, in addition to the fastening of the connecting elements to the curved leaves of the connecting elements can be made as one unit with curved leaves. For example, instead of attach separately connecting elements to curved sheets, the connecting elements can be formed within the curved sheets in the manufacturing process. The connecting elements can be made, for example, by applying an extrusion process with the mold, in which the connecting elements are formed by using the process of filing or grinding for forming connecting elements, by using the removal, milling, planing, moulding or forging process, or any other similar process known in the technique.

On Fig shows a flat view in cross section of an expandable tubular connection 1791 according to unfold here options for implementation. In this embodiment, the implementation of the connection 1791 includes a curved sheet A expandable tubular element connecting with a curved sheet V another rossiaemeridionalis element. Any expert in the art understands, however, that the expandable tubular connection elements can each include more than one curved sheet.

As you can see, curved sheet A includes posted coupling element A, and curved sheet B includes thereon corresponding connecting elements V. In these embodiments of the connecting elements typically use a dovetail for gearing connecting elements within a connection. However, in this implementation, instead of using form dovetail in the connecting elements are used other forms of capture. In this case, the term "form with capture" refers to the shape of the coupling element having a smaller base to attach the bent sheet in comparison with the main body of the connecting element. This form of capture can be used to create interference and interaction between the connecting elements of curved sheets when the connection between two or more expandable tubular members. Accordingly, the form with the link can engage with both sides of the connecting element, or only on one side of the connecting element. Further, as shown, curved leaves A, B and/or the connecting elements A. V may include fulfilled in them cavity A, B. Cavity A, B can be performed inside connections 1791 to achieve discharge, such as stress relief, bending and/or distortion on the curved sheets A, B and/or the connecting elements A. V at the time when the connecting elements A, B interact with each other. Further, the cavity can be filled or at least partially filled with material placed in them. This material may have other characteristics, such as higher or lower modulus or yield strength compared to materials used in the expandable tubular element for regulating and varying the properties of the expandable tubular element.

On Fig shows a view in section of an expandable tubular connection 1801 according to the disclosed here options for implementation. An expandable tubular element 1801 includes many of curved sheets of 1821, attached to each other. In these embodiments of the ends of the curved sheets are essentially in-line and flush with each other, forming a flat end surface of the expandable tubular member. In this implementation, however, the ends of curved sheets of 1821 can be placed relative to each other so that the expandable tubular element 180 is not formed flat end surface. In particular, as shown, one or more curved sheets 1821 can be farther in the longitudinal direction than the other curved sheets 1821, thus forming a gap between the ends of some of curved sheets of 1821. In this case, instead of connecting elements at the ends of the bent sheets to connect these expandable elements can be used other link connecting elements.

On Fig shows a flat view in cross section of an expandable tubular connection of 1991 according to the disclosed here options for implementation. In this embodiment, the implementation of the connection of 1991 includes a curved sheet A one expandable tubular element connecting with a curved sheet V another expandable tubular member. As you can see, curved sheet A includes one or more located therein connecting elements A, and curved sheet B includes one or more placed on its respective connecting elements W.

In these embodiments of the connecting elements are positioned at the ends of the curved sheets for coupling expandable tubular members. In this embodiment of the invention, however, the connecting elements A, B placed on the lateral surfaces of curved sheets A, B. When this connective cell battery (included) what you A bent sheet A are located on the concave inner surface of the curved sheet A, and connecting elements V bent sheet W can be located on the convex outer surface of the curved sheet W. This allows the connecting elements A, B to engage with each other to form the connection between 1991 two expandable tubular elements. Further, this connection 1991 can be used with the expandable tubular elements that do not form on it flat end surface, such as an expandable tubular element 1801 shown in Fig.

On Fig shows a flat view in cross section of an expandable tubular connection 2091 according to unfold here options for implementation. In this embodiment, the implementation of the connection 2091 includes a curved sheet A one expandable tubular element connecting with a curved sheet V another expandable tubular member. The connecting elements A, B can be located on the lateral surfaces of curved sheets A, B. In particular, the connecting elements A bent sheet A can be located on the concave inner surface of the curved sheet A, and connecting elements V bent sheet W can be located on the convex outer surface of the curved sheet W.

On Fig shows another flat view in cross section of an expandable tubular connection is s 2191 according to unfold here options for implementation. Expandable tubular connection 2191 may include connecting elements A, B that may be located on the lateral surfaces of curved sheets A, B. In these embodiments of the connecting elements are in the form of capture in order to facilitate the connection of the expandable tubular. However, in this embodiment, the implementation of the connecting elements A, B have instead an "open" form. Using here the open form refers to the shape of the coupling element with a large base, designed to attach a bent sheet, compared with the main body of the connecting element. Although this open form may not create interference and/or mutual engagement between the connecting elements when the radial deviation of curved sheets from each other, this open form may still be used to create interference and mutual engagement between the connecting elements bent sheet at the time when the curved leaves move in the longitudinal direction relative to each other. Accordingly, the connecting elements can interact with each other in at least one direction relative to each other. Further, curved leaves and the connecting elements may have a concave is poverhnosti, convex surface, or a combination of them. In addition, the connecting elements can be located essentially conical surface so that the sheets to the end converge on a cone. Also, the connecting elements can be located on the surface with a reverse taper, so that the leaves are tapered, with the larger ends of the cones are located at their ends.

On Fig and 23 shows planar views in cross section of an expandable tubular connection 2291, 2391. Expandable tubular connection 2291, 2391 include each expandable tubular element A, A connected to the expandable tubular element V, W. Each of the expandable tubular A, V, A, V has a lot of curved sheets A, B, A, 2321 AT. As you can see, the connecting elements A, B, A, B are located on curved sheets A, B, A, 2321 AT. Next, an expandable tubular connection 2291, 2391 may include therein one or more seals 2261, 2361. Seal 2261, 2361 may be placed inside the expandable tubular connections 2291, 2391, in order to prevent leakage of fluid through the connection 2291, 2391.

On Fig seal 2261 are located near the ends of the connecting elements A, B. When this seal 2261 may form a seal between the ends connect the additional elements A, V and the respective opposite ends of the curved sheets A, B. These seals 2261 may be used under compression connection 2291 and when the expandable tubular elements A, B slide into each other. On Fig further seal 2361 are located near the sides of the connecting elements A, B. When this seal 2361 may form a seal between the sides of the connecting elements A, B when interacting with each other. These seals 2361 can be used at a time when the connection 2391 is in tension and the expandable tubular elements A, B pulled out of each other.

Any expert in the art should be understood that although the seal is shown as located close to the connecting elements inside an extensible coupling element, the present invention is not limited, because the seal can be located in different places. For example, in another embodiment, the implementation of the seal can be located between the curved leaves of the expandable tubular elements and to prevent leakage through the expandable tubular connection.

Next person skilled in the art should be understood that although the seal is shown as having a circular cross-section, the present description is not ogranichivayas is this, because seals may be of any cross-section, known in the art. For example, in another embodiment, the implementation of the seal can have instead of a rectangular cross-section, hollow cross-section or C-shaped cross-section, without departing from the scope of the present description of the invention. In addition, a person skilled in the art should be understood that the seal may be made of any sealing material known in the art. For example, the seals may be made of elastic material such as rubber or plastic, can be made of metal, such as soft metal, to form a seal by compression or deformation, or can even be made from a combination of materials, such as a snap ring.

In one or more implementation options under this implementation variant of the connecting elements can be placed on curved sheets so that the connecting elements are on the entire circumference of the expandable tubular. However, the person skilled in the art should be understood that the present description of the invention is not limited to this, and in other embodiments of the connecting elements may be only part of the circumference of the expandable tubular elements.

For example the EP, as shown in Fig expandable tubular elements A, B have connecting elements A, V, which are only part of the end of tubular elements A, B. When connecting an expandable tubular A, B of the tubular elements A, B having connecting elements A, B placed on them, can be aligned and positioned near the parts of the tubular elements A, B without connecting elements A, B placed on them. Tubular elements A, B can be rotated relative to each other, and connecting elements A, B tubular A, B can then enter in the interaction and to form a connection. Although the connecting elements A, B not arranged on the entire circumference of the expandable tubular A, B, the connection between the expandable tubular elements A V may also form a seal between them to prevent leakage of fluid.

Further, according to unfold here options of implementation, with the expandable tubular connections can be used liners and/or rings to prevent leakage of fluid between the expandable tubular elements, and/or for the formation of structural supports expandable tubular connection. For example, the sleeve can be placed in races is iraiva tubular connection and expanded to contact with the expandable tubular connection or sleeve may be placed around the expandable tubular connection and compressed contact with the expandable tubular connection.

On Fig-28 shows many stylistic types of liners 2581-2881 according to unfold here options for implementation. On Fig sleeve 2581 includes a sealing material 2583 placed on the outer surface of the sleeve 2581. On Fig sleeve 2681 includes seal 2685, such as o-ring seal placed around the outer surface of the sleeve 2681. This seal 2685 may be located within a groove formed within the liner 2681. With seals 2685 and sealing material 2583 located on the outer surface of the liner 2581, 2681, these liners 2581, 2681 can be used as an inner liner, which should be placed within the expandable tubular connection.

Next on Fig sleeve 2781 includes a sealing material 2783, located inside the inner surface of the sleeve 2781. On Fig sleeve 2881 includes seal 2885, such as o-ring seal located on the inner surface of the sleeve 2881. This seal 2885 may be located within a groove made in the inner surface of the liner 2781, 2881, and these sleeves 2781, 2881 can be used as an external liner, which should be located around the expandable pipe is atogo connection.

The liner can then be manufactured using various materials and methods. For example, the liner can be made entirely or include a high-strength material such as metal, elastomer or composite materials (e.g. carbon fiber or Kevlar). The sealing material may then be placed on the external surface of the liner, when the sealing material napravlyayut, sprayed, wound or otherwise placed on the sleeve. So you can create a shell with high tensile strength, to obtain structural support for expandable tubular connections, in addition to the availability of seals to prevent leakage of fluid between the expandable tubular elements.

Accordingly, disclosed here, the embodiments may provide one or more of the following advantages. First, the embodiments disclosed herein may be used to connect to each other of the expandable tubular elements made of curved sheets. By placing the coupling element on the curved leaves of the expandable tubular element extensible pipe can then be connected to the expandable tubular member. Further disclosed here, the embodiments can provide communication with TP is of the connection between the expandable tubular members. By placing a seal between the coupling elements of the expandable tubular expandable tubular connection can prevent leakage between the fluid. And, finally disclosed here, the embodiments can improve the strength of the connection between the expandable tubular members. For example, by placing a sleeve around the expandable tubular connection or inside the joint strength can be increased and/or improved for uniform distribution of stresses.

Although the present description of the invention is described with reference to a limited number of implementation options, specialists in the art, using this description, we can assume the possibility of offering other options for implementations that do not deviate from the scope of the description given here. Accordingly, the scope of the description of the invention should be limited only by the attached claims.

1. Expandable tubular connection, comprising:
the first expandable tubular member and the second expandable tubular element, each of which has an axis drawn through it, and contains:
a lot of curved sheets, each of which has a concave inner surface and a convex outer surface, and a lot of curved leaves are a number of the m to each other around an axis;
the place of connection, in which one of the many curved sheets attached to the other of the sets of curved sheets; and many connecting elements, each of which is placed at least on one of the many curved leaves;
in which the first expandable tubular member and the second expandable tubular element is made with expandable from a first diameter to a second, larger diameter and compression from the second, larger diameter to the first diameter; and a set of connective elements of the first tubular element is made interoperable with many connecting elements of the second tubular element.

2. Expandable tubular connection according to claim 1, wherein a set of connective elements of the first expandable tubular element is located near his end, and many of the connecting elements of the second expandable element is located near his end.

3. Expandable tubular connection of claim 1, wherein at least one of the set of connecting elements of the first expandable tubular element is located at the end of one of the many curved sheets of the first expandable tubular element, and at least one of the set of connecting elements of the second expandable tubular ele is enta is located on the end of one of the many curved leaves of the second expandable tubular element.

4. Expandable tubular connection according to claim 3, in which at least one of the set of connecting elements of the first expandable tubular element is configured to interact with at least one of the sets of connecting elements of the second expandable tubular element.

5. Expandable tubular connection of claim 1, wherein at least one of the set of connecting elements of the first expandable tubular element is located on the concave inner surface of one of the many curved sheets of the first expandable tubular element, and at least one of the set of connecting elements of the second expandable tubular element is located on the convex outer surface of one of the many curved leaves of the second expandable tubular element.

6. Expandable tubular connection according to claim 5, in which at least one of the set of connecting elements of the first expandable tubular element is configured to interact with at least one of the sets of connecting elements of the second expandable tubular element.

7. Expandable tubular connection of claim 1, wherein the connection includes connecting material, mechanical fixing product, an interference fit, and elastic ele is UNT.

8. Expandable tubular connection of claim 1, wherein at least one of the multiple connecting elements made in one piece with at least one of the set of curved sheets of the first expandable tubular element, and at least one of the multiple connecting elements made in one piece with at least one of the set of curved sheets of the second expandable tubular element.

9. Expandable tubular connection of claim 1, wherein at least one of the multiple connecting elements attached to at least one of the set of curved sheets of the first expandable tubular element, and at least one of the multiple connecting elements attached to at least one of the set of curved sheets of the second expandable tubular element.

10. Expandable tubular connection according to claim 9, in which connection, at least one of the many connecting elements to at least one of the set of curved sheets of the first expandable tubular element includes one of: welding material, mechanical fixing product, an interference fit, adhesive material, soft solder, hard solder, and an elastic element.

11. Expandable tubular connection according to claim 1, which contains also the seal, you shall olnine with the possibility of placing between the first expandable tubular and the second expandable tubular member when the connection between them.

12. Expandable tubular connection according to claim 11, in which the seal is located near one of the many connecting elements of one of the first expandable tubular member and the second expandable tubular element.

13. Expandable tubular connection 12, in which the seal is located on the outer surface of one of the many connecting elements of one of the first expandable tubular member and the second expandable tubular element.

14. Expandable tubular connection 12, in which the seal is located next to the side of one of the many connecting elements of one of the first expandable tubular member and the second expandable tubular element.

15. Expandable tubular connection 12, in which the seal is located near the end of one of the many connecting elements of one of the first expandable tubular member and the second expandable tubular element.

16. Expandable tubular connection according to claim 1, which also contains a groove made in one of the first expandable tubular member and the second expandable tubular element.

17. Expandable tubular connection according to clause 16, in which a groove is made in one of the many connecting elements of one of the Isla of the first expandable tubular member and the second expandable tubular element.

18. Expandable tubular connection according to claim 1, which contains a sleeve placed near the end of one of the first expandable tubular member and the second expandable tubular element when the connection between them.

19. Expandable tubular connection p, in which the sleeve is located adjacent to the concave inner surface of one of the many curved sheets of one of the first expandable tubular member and the second expandable tubular element.

20. Expandable tubular connection p, in which the sleeve is located adjacent to the convex outer surface of one of the many curved sheets of one of the first expandable tubular member and the second expandable tubular element.

21. An expandable tubular element having a connection and conducted through the axis that contains:
a lot of curved sheets, each of which has a concave inner surface and a convex outer surface, and a lot of curved sheets are located next to each other around an axis;
the place of connection, in which one of the many curved sheets attached to the other of the sets of curved sheets, and lots of connecting elements, each of which is placed at least on one of the many curved leaves;
where the plural is the primary objective of connecting elements made with the possibility of connection with another set of connecting elements, located on the other expandable tubular member; and an expandable tubular element is made with expandable from a first diameter to a second, larger diameter.

22. An expandable tubular element according to item 21, in which at least one of the multiple connecting elements located on one end of one of the many curved sheets.

23. An expandable tubular element according to item 21, in which at least one of the multiple connecting elements located on one of the concave inner surfaces of one of the many curved sheets.

24. An expandable tubular element according to item 21, which also contains seal, located next to one of the many connecting elements.

25. An expandable tubular element according to item 21, which also contains a groove made in one of the many connecting elements.

26. An expandable tubular element according to item 21, which also contains a cavity filled inside one of the many connecting elements.

27. A method of manufacturing an expandable tubular element in which:
provide a lot of curved leaves, each from a variety of curved sheets includes a concave inner surface and a convex outer surface;
placed on an expandable tubular element in a myriad of interconnecting elements stored is, each of the multiple connecting elements located on at least one of the set of curved sheets; and
added a lot of curved sheets to each other at least at one connection point, so a lot of curved sheets are located next to each other around the axis, and an expandable tubular element is made with expandable from a first diameter to a second, larger diameter.

28. The method according to item 27, which is when many connecting elements are forming at least one set of connecting elements on at least one of the many connecting elements.

29. The method according to item 27, which is when many connecting elements shall attach at least one of the set of connecting elements on at least one of the many connecting elements.

30. The connection method of the first expandable tubular element to the second expandable tubular element, in which:
provide the first expandable tubular member and the second expandable tubular element, each of which contains:
a lot of curved sheets, each of which has a concave inner surface and a convex outer surface, so a lot of curved Lys is s located next to each other around the axis of the expandable tubular element;
the place of attachment, which attaches one of the many curved sheets to the other of the sets of curved sheets; and many connecting elements, each of which is located on at least one of the set of curved sheets;
interact multiple connecting elements of the first expandable tubular element with many connecting elements of the second expandable tubular element.

31. The method according to item 30, in which
expanding the first expandable tubular member and the second expandable tubular element from a first diameter to a second, larger diameter.

32. The method according to item 30, in which at least one of the set of connecting elements of the first expandable tubular element is placed on the end of one of the many curved sheets of the first expandable tubular element, and at least one of the set of connecting elements of the second expandable tubular element is placed on the end of one of the many curved leaves of the second expandable tubular element.

33. The method according to item 30, in which at least one of the set of connecting elements of the first expandable tubular element is placed on the concave inner surface of one of the many curved sheets of the first p is Shiryaevo tubular element, moreover, at least one of the set of connecting elements of the second expandable tubular element is placed on the convex outer surface of one of the many curved leaves of the second expandable tubular member.



 

Same patents:

FIELD: machine building.

SUBSTANCE: electro-insulated connection of pipelines consists of metal branches with ring bosses whereon there is formed fastener in form of bush out of composite material, of protective ring out of dielectric material installed between ends of branches and of packing collar out of elastomer material enveloping end sections of branches. Circular recesses are made on the end sections of the branches on their end surfaces; behind the cross section of the recesses to the side of the opposite branch there are made circular projecting sections. The protective ring has a narrow section installed between the circular projecting sections and a convex section put on the circular projecting sections. The packing collar envelopes the protective ring with its internal surface; while with its external surface it contacts surface of a cavity formed with the fastener and ends of the branches. Adjacent surfaces of the projecting sections of the branches ends and the packing collar are glued.

EFFECT: increased reliability of pressure tightness of connection under low and high loads.

2 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: connection of main and lateral pipelines in heat systems consists of T-joint on main pipeline and of L-shaped tubular insertion. The side branch of the T-joint is perpendicular to the lateral pipeline. According to the first version the L-shaped insertion connects the side branch of the T-joint with the lateral pipeline. The distinguished feature of the claimed design of the first version is connection of the L-shaped insertion with the side branch of the T-joint by means of a hinge wherein axis of rotation coincides with axis of the branch. According to another version the lateral pipeline has a L-shaped tubular element wherein one axis is parallel to axis of the side branch of the T-joint, while a "П"-shaped tubular insertion is installed between the branch of the T-joint and the L-shaped element of the lateral pipeline. The tubular insertion is connected to them by means of pivot connections with axes of rotation coinciding with axes of the side branch and L-shaped element.

EFFECT: increased reliability of pipelines connection.

2 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: coupling is made with grooves. In the middle part of the coupling there is located an arrester for centring connected pipes. Grooves are cut on ends of connected pipes on external side; before connection the grooves are preliminary filled with glue composition; ends of the pipes are successively press fitted into the coupling.

EFFECT: raised reliability of pipes connection, preservation of internal coating of pipes.

1 dwg

FIELD: machine building.

SUBSTANCE: dielectric pads are arranged between adjacent ends of two branches made out of pipeline material and between branches and connecting them external coupling. The branches are permanently connected with the coupling by means of joint radial expansion of the branches and coupling thus forming circular lugs on external surface of the branches and coupling with height exceeding thickness of the dielectric pads between the branches and the coupling. Internal surface of the branches is lined with a polymer coating ends of which are fastened and sealed by means of radial deformation of metal binding tips in them. The circular ends on external surface of the coupling and branches are formed at a certain distance from the ends of the coupling, while end sections of the coupling are reduced by means of radial squeezing and forming internal lugs in the branches.

EFFECT: raised reliability of insertion at high pressure in pipeline.

4 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: dielectric pads are arranged between adjacent ends of two branches made out of pipeline material and between branches and external coupling connecting them. The branches are permanently connected by a coupling by means of joint expansion of branches and coupling, thus forming circular lugs on external surfaces of the branches and coupling with height exceeding thickness of the dielectric pads between the branches and the coupling. Internal surface of the branches is lined with polymer coating, ends of which are secured and sealed. Also the dielectric pads between the branches and coupling are compound. In zones of external biases of at least of one of the lugs and within the range of each branch there are positioned dielectric pads out of material of low creep, while on the rest of sections there are used the dielectric pads out of plastic or elastic material.

EFFECT: raised reliability of insertion at high pressure in pipeline.

5 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: between nozzles and external coupling that connects them there are dielectric gaskets installed of hot melt polymer, having adhesion to materials of coupling and nozzles, nondetachable joint of nozzles is arranged with coupling by means of joint radial expansion of nozzles and coupling to form circular ledges on external surfaces of nozzles and coupling with height that exceeds thickness of dielectric gaskets between nozzles and coupling. Radial pressing of end sections of coupling is done to form internal ledges in nozzles, central part of coupling is heated up to temperature of hot melt polymer melting start with maintenance of temperature of end sections of coupling below temperature of polymer melt, and internal surface of nozzles is lined with polymer shell, ends of which are fixed and sealed by means of radial deformation of metal jamming tips in them.

EFFECT: increased reliability of current-isolating insert at high pressure in pipeline.

5 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: specified parts have edges with grooves. Isolation insert is arranged by means of injection and provides for internal flow for liquid passage between specified parts and covers specified parts with grooves, providing for tight connection of isolation insert with specified parts.

EFFECT: invention improves reliability of joint.

18 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: electrically insulating flange connection of plain tubes includes metal housing in the form of cylinder restricted on one side with inner annular projection, and on the other side rigidly connected to one flange. The other flange is equipped with cylindrical projection tightly enclosed in metal housing to which cylinder from dielectric material is inserted without a gap, between which and cylindrical projection of the flange the annular rubber gasket is installed, which protects inner cavities of connection against atmospheric action. Annular sealing gaskets, metal rings, C-shaped rings made from material which is harder than tube material, movable metal bushes and stepped bushes from dielectric material are in series located symmetrically from electrically insulating insert between tubes. When tightening the fasteners the sealing gaskets are pressed in closed volume between side surfaces of electrically insulated insert and metal rings, and inner conical surface of movable metal bushes acts on outer spherical surface of C-shaped rings, presses them, and pointed projections on inner surface of C-shaped rings are pressed to the tube body by fixing electrically insulating flange connection of plain tubes.

EFFECT: invention improves the connection reliability.

1 dwg

FIELD: machine building.

SUBSTANCE: invention refers to pipe production, particularly to pipe connecting points made with application of composite fibre materials and can be implemented at fabrication of pipe connecting points corresponding to elements of cathode protection from electric-chemical corrosion in oil-gas-product-pipelines. The insulating connecting point of metal pipes consists of metal branches with circular bosses whereon there is formed a coupling out of composite materials; a circular element is arranged between conjugating ends of the branches; the circular element consists of a lug of rectangular profile and side relative to the lug flanges placed in recesses of branch walls. According to the invention the circular element is made out of rigid insulating material resistant to aggressive mediums, for example to polyamide; the lug is located from the side of an insertion; the flanges are placed in recesses made on internal walls of the branches and fixed with cylinder rings secured in bores of the branches; also profiles of recesses and side flanges are made with gaps between them wherein packing and retaining their position rings are installed.

EFFECT: invention upgrades reliability of electric-insulating connection of pipelines.

1 dwg

FIELD: machine building.

SUBSTANCE: permanent electrical insulating joint comprises two metal nozzles, one of which is made with a socket, between which there is a ring installed made of dielectric material. The other nozzle is made with the reduced diametre, in gap produced with an internal surface of socket and external surface of reduced diametre of nozzle, there is a ring made of dielectric material, and space between them is filled with cloth impregnated with epoxy resins. Edges of nozzle with a reduced diametre are rolled to make a reliable lock joint.

EFFECT: invention simplifies design of permanent coupling joint and increases its reliability.

1 dwg

FIELD: mining engineering.

SUBSTANCE: connection for pump rods consists of conic enveloped and enveloping elements with multitude of trapezoid threads. The enveloped element is screwed by thread into the enveloping element. Also, both sides of each thread turn on the enveloped element contact sides of thread on the enveloping element forming diametre tightness between the elements. The enveloping element is equipped with a collar, surface of which is perpendicular to lengthwise axis of the said element and which is positioned at an end of turns; while the enveloping element has a collar located on front surface of the said element also perpendicular to its axis. At assembly both collars contact each other facilitating accurate specified diametre tightness between turns of thread of the enveloped and enveloping elements. Notably, axial tightness between the said elements is considerably decreased.

EFFECT: increased fatigue resistance of threaded connection.

17 cl, 24 dwg

FIELD: oil and gas production.

SUBSTANCE: device consists of hollow pump rods and of connecting elements interconnected along axis between driven head on surface of oil well and rotor pump located in bottomhole of oil well. Each hollow pump rod has at least first end with internal threaded surface coupled with external threaded surface of the connecting element, such as a nipple element. There are used conic threads of asymmetric profile and various taper to optimise distribution of stresses between elements. There are preferred versions where two collars with maximum average diameter and area of cross section are used to increase resistance to maintaining reactive torque in a string. A free end of the nipple element forms the second collar for torque transfer facilitating transfer of torque at assembly and simultaneously forming small boss on the said free end decreasing problems of erosion-corrosion.

EFFECT: raised quality of connection, strength and reliability.

50 dwg, 17 cl

FIELD: oil and gas industry.

SUBSTANCE: device consists of shank with cone at the top and pressurising seat at the bottom; and valve unit connected to shoe equipped with filter is located below the above seat. At that, aluminium plug is screwed onto lower end of shoe. At that, device includes pipe string with nipple having the possibility of tight interaction with cone of shank, and disconnector. Cone is provided on the inner side with narrowing for nipple and above located pins. Disconnector attaches upper part of shank to lower part of pipe string and is made in the form of hollow housing located on pipe string above nipple, with external slots for the cone pins. When pins are arranged in slots the nipple is located below annular narrowing of cone, in transport position. And when pins are arranged outside slots of cone the nipple is located within the annular narrowing of cone.

EFFECT: device has simple design, which optimises work technique and saves financial expenses, and allows shortening the time spent on shank cementing in well, owing to minimising the number of lowering and lifting operations.

4 dwg

Bladed calibrator // 2425949

FIELD: oil and gas industry.

SUBSTANCE: bladed calibrator includes hollow housing the outer surface of which is reinforced with rock cutting elements and provided with scrubbing slots. Peculiar feature of calibrator is that scrubbing slots in longitudinal section are made in the form of part of laval nozzle with staged operating surface; at that, length of slot stages increases towards the movement of scrubbing agent. At that, staged part of nozzle is made in the form of detachable part and has dovetail shape in its cross section, and housing is provided with slot of mating shape. Sharp edges of stages part of nozzle are made from hard alloy or reinforced with wear-resistant material.

EFFECT: higher operating efficiency of bladed calibrator owing to slurry grinding and increasing the removal speed of broken slurry in zone of its scrubbing system.

5 cl, 4 dwg

FIELD: oil and gas industry.

SUBSTANCE: device for retaining well drilling tool in vertical position uses pendulum. Pendulum controls the flow of outlet holes of drilling fluid chambers by directing it to activation pistons of centralisers acting on centraliser plates. At deviation of outer housing from vertical position the pendulum deviates under action of gravity force and occupies hinged position offset at an angle. At that, hydraulic pressure is corrected in one or two outlet holes of one or two drilling fluid chambers; as a result, hydraulic force which acts on one or two pistons making one of centralisers change its position for outer housing to return back to vertical position till pendulum is set to concentric hinge position changes, and balanced pressure equilibrium is recovered in drilling fluid chambers.

EFFECT: higher drilling accuracy and operating reliability of device.

10 cl, 8 dwg

FIELD: oil and gas industry.

SUBSTANCE: device includes pair of connecting elements rigidly attached to pipe ends and providing butt joint of end surfaces of pipes, embedded locking member with through hole, which is installed into mounting slot, and fastener providing the fixture of embedded locking member. Pair of members includes plate attached to end of one pipe, and sleeve with inner thread attached to the end of other pipe. Plate includes longitudinal sleeve inlet slot which corresponds to sleeve as to dimensions, and transverse mounting slot corresponding to locking member as to shape and dimensions. Longitudinal slot partially covers the mounting slot. Through slot on embedded locking member corresponds to sleeve as to shape and dimensions. Bolt is used as fastener.

EFFECT: lower metal consumption and simpler erection.

5 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: bore-hole disconnector includes hollow disconnected reducer with thread at the top and collet at the bottom and sleeve with thread at the bottom and annular recess for collet on the outer side. Sleeve has many-sided projections on the outer side at the top, which are connected by means of collet equipped from the inside with many-sided slot for many-sided slots of sleeve and movable sleeve fixed on the outside. Movable sleeve is installed on reducer with possibility of tight longitudinal upward movement under action of excess pressure in cylindrical cavity interconnected through a hole to reducer cavity. Cylindrical cavity is formed with lower annular extension of reducer and upper annular narrowing of movable sleeve, which envelops annular extension of reducer with possibility of tight upward movement. Annular narrowing for free-fall ball is made in the cavity below reducer holes. Side channel is made in movable sleeve and has the possibility of interaction with cylindrical cavity at upward movement of movable sleeve. Reducer can be equipped from above with rigid centraliser.

EFFECT: reliability is ensured irrespective of pressure drop with possibility of control of actuation from well head, and jamming of device is excluded at its actuation in well.

2 cl, 2 dwg

FIELD: oil and gas production.

SUBSTANCE: device designed for casing boreholes with shank ends of casing wells consists of case stepped by diameter and connected with transporting string via bore arranged in the case. Also, the case at his upper step of bigger diameter forms a circular cavity with a bore; in the cavity there is positioned a differential bush with load bearing stops; the bush is connected with the case by means of a sheared element. The differential bush travels axially under hydraulic pressure in the transport string releasing load carrying stops and disconnecting the case from a funnel inside the case connected with the shank end. The funnel is stepped and forms an intermediate cavity with a lower step of the case. In the intermediate cavity there is installed a bush connected with the funnel and made with end slots interacting with response slots of the case. The shank end is equipped with a sub with internal circular bore; the sub is connected with a lower step of the funnel of smaller diameter.

EFFECT: simplified design, increased reliability of operation and expanded range of application.

1 dwg

FIELD: oil and gas production.

SUBSTANCE: external member for drilling equipment with upper hammer consists of cavity with cylinder or conic internal thread and stop ledge. Also, depth of a thread groove successively diminishes in the direction to a thread end defined with a boundary line separating a bottom of the groove from cylinder or conic surface formed between the boundary line and the ledge. Said surface coincides with height of thread profile or the groove bottom. The procedure for fabrication of the external member consists in stages of continuous feed of a turning tool in a lengthwise direction to the cavity of a machined member, in actuating the tool into reciprocal travel between radial external and internal end positions to cut thread of required profile and in successive reducing difference of radii to zero for finish of a thread groove at gradually decreasing depth at a final stage.

EFFECT: increased mechanical strength of connection.

6 cl, 10 dwg

FIELD: oil and gas production.

SUBSTANCE: centraliser for casing string consists of hollow case made in form of two cylinder rings interconnected with centring elements. Flexible straps for turbulisation of rising flow of cement grout are arranged on cylinder rings at angle to their lengthwise axis.

EFFECT: raised quality of casing string cementing.

1 dwg

FIELD: oil extractive industry.

SUBSTANCE: device has inner and outer pipes, placed coaxially with forming of ring-shaped space between them. Ring-shaped space is pressurized by vacuum seams, thermo-isolation is placed therein and vacuum is formed, on both sides of outer pipe thread is made, on one end thereof sleeve is screwed with isolating bushing. Vacuum seams are made at even spaces from ends of outer pipe, calculated from formula L=K·β, where L - distance between vacuum seam and end of outer pipe, mm; K - number of predicted maintenances of threads of thermo-isolated pipe; β - value of shortening of thermo-isolated pipe after single thread maintenance, mm. Also described is another variant of thermo-isolated pipe, wherein vacuum seams are made at different spaces from ends of outer pipe. Distance on side of sleeve is calculated from formula: LM=KM·β, where LM - distance between vacuum seam and end of sleeve end of outer pipe, mm, KM - number of predicted maintenances of thread of sleeve end of thermo-isolated pipe; β - value of shortening of thermo-isolated pipe after single thread maintenance, mm; and on nipple side space is calculated from formula: LH=KH·β, where LH - distance between vacuum seam and end of nipple end of outer pipe, mm; KH - amount of predicted maintenances of thread of nipple end of thermo-isolated pipe, while KM<KH.

EFFECT: higher efficiency.

2 cl, 1 dwg

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