CN114856458A - Connecting device applied to multi-channel continuous oil pipe and generator - Google Patents

Abstract

The invention relates to a connecting device applied to a multi-channel coiled tubing and a generator, which comprises: the first connecting part, the second connecting part and the third connecting part are sequentially connected from top to bottom; one end of the first connecting part is used for being sleeved and fixedly connected with the outer peripheral wall of the multi-channel continuous oil pipe in a sealing manner; one end of the second connecting part is hermetically sleeved in the other end of the first connecting part; the third connecting part is connected with the other end of the second connecting part in a sealing way, and meanwhile, the third connecting part is used for communicating the inner pipe in the multi-channel continuous oil pipe with the internal pipeline of the generator in a sealing way; and the holding device is sleeved on the peripheral wall of the multichannel continuous oil pipe and is positioned between the first connecting part and the second connecting part, wherein the holding device is constructed into the following structure: in the process that first connecting portion and second connecting portion are connected, hold the device and can form gradually holding tightly to multichannel coiled tubing's periphery wall. The connecting device can reduce the connecting difficulty of the multi-channel coiled tubing and the generator.

Description

Connecting device applied to multi-channel continuous oil pipe and generator

Technical Field

The invention belongs to the technical field of connecting devices, and particularly relates to a connecting device applied to a multi-channel continuous oil pipe and a generator.

Background

The underground hot fluid generation technology is represented by an underground steam generation technology, and the technical principle is as follows: transforming the original steam generator and moving the steam generator from the ground to the underground; steam generation at the reservoir is injected directly into the formation: water, fuel, oxygen or air are fed into combustion cavity via pipeline, after ignition, the water is heated to become steam, which is sprayed into thick oil layer with waste gas via holes in casing, and the heated crude oil is produced from nearby production well.

The multi-channel coiled tubing is also called as a tube-in-tube, is a novel coiled tubing product which is provided with a plurality of non-interfering continuous injection channels, can realize rapid one-time well descending, has no coupling in the middle and can simultaneously inject different types of media into the same position in the well, and is an optimal transmission channel for realizing the well descending of a generator.

In the prior art, the length of the multi-channel coiled tubing is usually very long, and meanwhile, the long multi-channel coiled tubing is inconvenient to rotate, so that the connection difficulty between the multi-channel coiled tubing and the generator is greatly increased.

Disclosure of Invention

In order to solve all or part of the problems, the invention aims to provide a connecting device applied to a multi-channel coiled tubing and a generator so as to reduce the connecting difficulty of the multi-channel coiled tubing and the generator and improve the sealing performance and the reliability of the connection of the multi-channel coiled tubing and the generator.

The invention provides a connecting device applied to a multi-channel coiled tubing and a generator, which comprises: the first connecting part, the second connecting part and the third connecting part are sequentially connected from top to bottom; one end of the first connecting part is used for being sleeved and fixedly connected with the outer peripheral wall of the multi-channel continuous oil pipe in a sealing manner; one end of the second connecting part is hermetically sleeved in the other end of the first connecting part; the third connecting part is connected with the other end of the second connecting part in a sealing way, and meanwhile, the third connecting part is used for communicating the inner pipe in the multi-channel continuous oil pipe with the internal pipeline of the generator in a sealing way; and the holding device is sleeved on the peripheral wall of the multichannel continuous oil pipe and is positioned between the first connecting part and the second connecting part, wherein the holding device is constructed into the following structure: in the process that first connecting portion and second connecting portion are connected, hold the device and can form gradually holding tightly to multichannel coiled tubing's periphery wall.

In some embodiments, the clasping device is configured as an annular sleeve, an opening is formed on an annular wall of the annular sleeve along the axial direction, the outer peripheral wall of the annular sleeve is configured as a first inclined surface, a second inclined surface is formed in one end of the second connecting part, which is abutted to the clasping device, and the second inclined surface is configured as: the second inclined surface can gradually reduce the size of the opening in the process of connecting the first connecting portion and the second connecting portion.

In some embodiments, the annular sleeve has a plurality of teeth formed on an inner peripheral wall surface thereof, and the teeth are arranged vertically and/or horizontally.

In some embodiments, the first connection portion comprises a first sleeve section and a second sleeve section which are coaxially connected, the first sleeve section is used for being fixedly connected with the multi-channel coiled tubing in a sealing mode, an annular cavity is formed between the second sleeve section and the outer peripheral wall of the multi-channel coiled tubing, and an internal thread structure is formed on the inner peripheral wall of the second sleeve section; the holding device is arranged in the annular cavity, one end of the second connecting portion is located in the annular cavity and is abutted to the holding device, and one end of the second connecting portion is in threaded connection with the second sleeving section.

In some embodiments, the outer peripheral wall of the first socket section is radially formed with a plurality of threaded holes therethrough.

In some embodiments, the clamp further comprises a gasket abutting between the first nesting section and the clasping device.

In some embodiments, the second connecting part comprises a third sleeve connecting section and a cylinder body connecting section which are coaxially connected, the third sleeve connecting section is connected with the first connecting part, and an annular groove is formed in the peripheral wall of the third sleeve connecting section and used for installing the sealing ring; the end of the cylinder connecting section is formed with a flange structure connected with the third connecting part.

In some embodiments, the third connecting portion is configured as a plate-shaped flange, and an annular groove is formed on a surface of the third connecting portion, which is in fit with the second connecting portion, and is used for installing the sealing ring.

In some embodiments, the third connecting part is provided with a cable joint, a plurality of inner pipe outlets and an annular outlet along the axial direction of the third connecting part; the cable joint is used for electrically connecting the cable in the multi-channel continuous oil pipe and the internal cable of the generator; the outlet of the inner pipe is used for communicating the inner pipe in the multi-channel continuous oil pipe with a pipeline inside the generator; one end of the annular outlet is communicated with the connecting section of the cylinder body, and the other end of the annular outlet is used for being connected with a pipeline inside the generator.

In some embodiments, the oil pipe further comprises a metal hose for connecting one end of the inner pipe and one end of the outlet of the inner pipe in the multi-channel continuous oil pipe, wherein two ends of the metal hose are respectively in threaded connection with one end of the inner pipe and one end of the outlet of the inner pipe in the multi-channel continuous oil pipe.

The connecting device applied to the multi-channel continuous oil pipe and the generator has the following advantages:

1) the connecting device can directly butt-joint and connect and fix the multi-channel continuous oil pipe and the generator without rotating the multi-channel continuous oil pipe or the generator, and can effectively ensure the sealing performance and the fixing reliability, thereby reducing the connection difficulty of the multi-channel continuous oil pipe and the generator and prolonging the service life;

2) the connecting device can independently convey media, can separate cables from a medium flow channel, and can be freely butted with a generator;

3) according to the connecting device, the flow area of each channel in the multi-channel continuous oil pipe can not be reduced through the third connecting part, so that the conveying parameters of various media cannot be influenced;

4) the connecting device is internally connected through the high-pressure-resistant metal hose, and can effectively ensure the compensation of the connecting angle and the length of the inner pipe of the multi-channel continuous oil pipe.

Drawings

FIG. 1 is a schematic structural diagram of some embodiments of a connection device for a multi-pass coiled tubing to a generator, illustrating the connection of the multi-pass coiled tubing, the connection device, and the generator, in accordance with embodiments of the present invention;

FIG. 2 is a schematic bottom view of the connection device of FIG. 1 applied to a multi-pass coiled tubing and generator;

FIG. 3 is a view in the direction A-A of the connection device applied to the multi-pass coiled tubing and generator shown in FIG. 2;

FIG. 4 is an enlarged schematic view at B of the connection device applied to the multi-pass coiled tubing and the generator shown in FIG. 3;

FIG. 5 is a schematic structural view of a multi-pass coiled tubing according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a clasping device according to an embodiment of the present invention;

FIG. 7 is a bottom view of the clasping means shown in FIG. 6;

FIG. 8 is a view of the clasping means shown in FIG. 7 taken along the direction C-C;

fig. 9 is a schematic structural diagram of a first connection portion according to an embodiment of the invention;

FIG. 10 is a longitudinal cross-sectional view of the first connection portion shown in FIG. 9;

FIG. 11 is a schematic structural diagram of a second connecting portion according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a second connecting portion from another perspective according to an embodiment of the present invention;

FIG. 13 is a schematic structural diagram of a third connecting portion according to an embodiment of the present invention;

FIG. 14 is a side view of the third connecting portion shown in FIG. 13;

fig. 15 is a schematic structural view of a metal hose according to an embodiment of the present invention.

Detailed Description

For better understanding of the purpose, structure and function of the present invention, a connecting device for a multi-channel coiled tubing and a generator according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of some embodiments of a connection device 100 applied to a multi-pass coiled tubing 200 and a generator 300, illustrating the connection of the multi-pass coiled tubing 200, the connection device 100 and the generator 300, according to embodiments of the present invention; FIG. 2 is a schematic bottom view of the connection device 100 of FIG. 1 applied to the multi-pass coiled tubing 200 and the generator 300; FIG. 3 is a view in the A-A direction of the connection device 100 applied to the multi-pass coiled tubing 200 and the generator 300 shown in FIG. 2;

fig. 4 is an enlarged schematic view at B of the connection device 100 applied to the multi-pass coiled tubing 200 and the generator 300 shown in fig. 3. As can be seen from fig. 1 to 4, the connection device 100 for connecting the multi-channel coiled tubing 200 and the generator 300 comprises: a first connection part 10, a second connection part 20 and a third connection part 30 connected in sequence from top to bottom; wherein, one end of the first connecting part 10 is used for being sleeved and fixedly connected with the outer peripheral wall of the multi-channel coiled tubing 200 in a sealing manner; one end of the second connecting part 20 is hermetically sealed in the other end of the first connecting part 10; the third connecting part 30 is connected with the other end of the second connecting part 20 in a sealing way, and meanwhile, the third connecting part 30 is used for connecting the inner pipe in the multi-channel coiled tubing 200 with the internal pipeline of the generator 300 in a sealing way; and a clasping device 40 which is sleeved on the peripheral wall of the multi-channel coiled tubing 200 and is positioned between the first connecting part 10 and the second connecting part 20, wherein the clasping device 40 is constructed as follows: the clasping means 40 can gradually clasp the outer circumferential wall of the multi-channel coiled tubing 200 during the connection of the first connection part 10 and the second connection part 20.

As shown in fig. 5, the multi-channel coiled tubing 200 mentioned in the present application should be understood to include an outer tube, a plurality of inner tubes independently disposed in the outer tube, and a cable, wherein the plurality of inner tubes can be used for transporting a medium such as liquid, fuel, and oxidizer. A plurality of in the application body can be at its free end prefabricated external screw thread structure to subsequent connection.

When the connecting device 100 applied to the multi-channel coiled tubing 200 and the generator 300 is used, the connecting end of the multi-channel coiled tubing 200 is integrally inserted into the first connecting part 10, so that the first connecting part 10 is hermetically sleeved on the multi-channel coiled tubing 200, and then the clasping device 40 and the second connecting part 20 are sequentially installed, and in the connecting process of the first connecting part 10 and the second connecting part 20, the clasping device 40 gradually clasps the outer peripheral wall of the multi-channel coiled tubing 200, so that the installation of the first connecting device 100, the second connecting device 100, the clasping device 40 and the multi-channel coiled tubing 200 is completed. Further, the third connection part 30 is connected to the second connection part 20 after hermetically communicating the inner pipe of the multi-channel coiled tubing 200 with the inner pipeline of the generator 300, so that the connection device 100 applied to the multi-channel coiled tubing 200 and the generator 300 according to the embodiment of the present invention is completely installed.

Through the arrangement, the connecting device 100 applied to the multi-channel coiled tubing 200 and the generator 300 can directly butt-joint, connect and fix the multi-channel coiled tubing 200 and the generator 300 without rotating the multi-channel coiled tubing 200 or the generator 300, and can effectively ensure the sealing performance and the fixing reliability, thereby reducing the connecting difficulty of the multi-channel coiled tubing 200 and the generator 300 and prolonging the service life.

Referring to fig. 6 to 8, fig. 6 is a schematic structural diagram of a clasping device 40 according to an embodiment of the present invention;

FIG. 7 is a bottom view of the clasping means 40 shown in FIG. 6; figure 8 is a view in the direction C-C of the clasping means 40 shown in figure 7. In some embodiments, the clasping device 40 may be configured as an annular sleeve, an opening 41 is formed on an annular wall of the annular sleeve along the axial direction, an outer peripheral wall of the annular sleeve is configured as a first inclined surface 42, a second inclined surface 21 is formed in one end of the second connecting portion 20 abutting against the clasping device 40, and the second inclined surface 21 is configured as: the second inclined surface 21 can gradually reduce the size of the opening 41 during the connection of the first connection portion 10 and the second connection portion 20.

In this application, at the in-process that first connecting portion 10 and second connecting portion 20 are connected, second inclined plane 21 reduces the size of opening 41 gradually, can make and hold device 40 more be inseparable laminating and hold multichannel coiled tubing 200's outer wall tightly to can make fixed connection more firm reliable.

Referring to fig. 8, in some embodiments, the inner peripheral wall surface of the annular sleeve may be formed with a plurality of teeth 43, and the teeth 43 may be disposed vertically and/or horizontally.

In the present application, the tooth-like structure 43 may be configured as a strip-like protrusion. The strip-shaped protrusions are arranged vertically and/or horizontally, so that the clasping device 40 can have tensile and torsional capabilities in the horizontal and/or vertical direction, and can bear higher tensile and compressive torques, and the stability of the connection device 100 and the multi-channel coiled tubing 200 in the embodiment of the invention is further improved.

Referring to fig. 9 and 10, in some embodiments, the first connection portion 10 may include a first casing section 11 and a second casing section 12 coaxially connected to each other, the first casing section 11 is configured to be fixedly connected to the multi-channel coiled tubing 200 in a sealing manner, and the second casing section 12 forms an annular cavity with the outer circumferential wall of the multi-channel coiled tubing 200. Wherein, the inner peripheral wall of the second socket joint section 12 is formed with an internal thread structure; the clasping device 40 is arranged in the annular cavity, one end of the second connecting part 20 is positioned in the annular cavity and is abutted against the clasping device 40, and one end of the second connecting part 20 is in threaded connection with the second sleeving connection section 12.

In this application, the internal diameter of first cup jointing section 11 is less than the internal diameter of second cup jointing section 12 to make the junction of first cup jointing section 11 and second cup jointing section 12 be formed with step 13, this step 13 can be used to the spacing of clasping device 40.

With continued reference to fig. 10, in some embodiments, the outer peripheral wall of the first socket section 11 may be radially formed with a plurality of threaded holes 14 therethrough. With this arrangement, the stability of the fixation of the first connection portion 10 to the outer wall of the multi-pass coiled tubing 200 can be further enhanced by using a member such as a screw or a jack screw that is engaged with the threaded hole 14.

With continued reference to fig. 10, in some embodiments, the inner peripheral wall of the first nesting section 11 is further formed with an annular groove 24 for mounting a gasket.

Referring to fig. 4, in some embodiments, the connection device 100 applied to the multi-channel coiled tubing 200 and the generator 300 according to the embodiment of the present invention may further include a gasket 50, and the gasket 50 abuts between the first casing section 11 and the clasping device 40. Through this setting, the packing ring 50 is used for installing in the position of step 13 to carry out spacingly to holding device 40, thereby can make holding device 40 can form better contact with the outer wall of multichannel coiled tubing 200. In addition, the gasket 50 can be used for filling the gap between the holding device 40 and the step 13, so that the holding device 40 can be connected with the multi-channel coiled tubing 200 at a preset position.

Referring to fig. 11 and 12, in some embodiments, the second connection portion 20 may include a third socket section 22 and a cylinder connection section 23, which are coaxially connected, the third socket section 22 is connected to the first connection portion 10, an annular groove 24 is formed on an outer peripheral wall of the third socket section 22, and the annular groove 24 is used for installing a sealing ring; the end of the cylinder connection section 23 is formed with a flange structure connected to the third connection part 30.

Referring to fig. 13 and 14, in some embodiments, the third connecting portion 30 is configured as a plate-shaped flange, and an annular groove (not shown) is formed on a surface of the third connecting portion 30, which is attached to the second connecting portion 20, and is used for mounting a sealing ring.

In this application, the sealing washer of installation can improve the sealing performance of connecting. In the present application, the multi-channel coiled tubing 200 and the generator 300 may not be rotated by flange connection, so that connection may be more convenient and reliable.

With continued reference to fig. 13 and 14, in some embodiments, the third connecting portion 30 may have a cable joint 31, a plurality of inner tube outlets 32, and an annulus outlet 33 along an axial direction thereof; the cable joint 31 is used for electrically connecting the cable inside the multi-channel coiled tubing 200 and the internal cable of the generator 300; the inner tube outlet 32 is used for communicating the inner tube in the multi-channel coiled tubing 200 with the pipeline inside the generator 300; the annulus outlet 33 has one end in communication with the barrel connection section and the other end for connection to the tubing inside the generator 300.

In this application, the connection device 100 forms independent interfaces with each medium flow passage of the generator 300 respectively for each inner tube passage in the multi-channel coiled tubing 200 and an annulus passage between the inner tube and the outer tube. Specifically, the plurality of inner tube outlets 32 are used for communicating inner tubes in the multi-channel coiled tubing 200 with pipelines inside the generator 300; the annulus outlet 33 is used to communicate the annulus passageway between the inner and outer tubes with the line connection inside the generator 300. With this arrangement, on the one hand, the connection device 100 can independently transport the medium, and at the same time, can separate the cable from the medium flow path, and can be freely docked with the generator 300; on the other hand, the connection device 100 can not reduce the flow area of each channel in the multi-channel coiled tubing 200 through the third connection part 30, so that the delivery parameters of various media are not affected.

Referring to fig. 15, in some embodiments, the connection device 100 applied to the multi-channel coiled tubing 200 and the generator 300 according to the embodiment of the present invention may further include a metal hose 60, wherein the metal hose 60 is used for connecting an inner tube in the multi-channel coiled tubing 200 and one end of the inner tube outlet 32. Wherein, two ends of the metal hose 60 are respectively in threaded connection with one ends of the inner tube in the multi-channel coiled tubing 200 and the outlet 32 of the inner tube.

The material of the metal hose 60 in the present application may be one of stainless steel, copper, iron, and the like. The metal hose 60 in the present application may be generally composed of three major parts, a bellows, a net, and a joint. The bellows is the body of the metal hose 60, and plays a role of flexibility; the net sleeve plays the roles of strengthening and shielding; the linker functions as a linker. Through the arrangement, the interior of the connecting device 100 is connected through the high pressure-resistant metal hose 60, and the compensation of the connection angle and the length of the inner pipe of the multi-channel coiled tubing 200 can be effectively ensured.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (10)

1. The utility model provides a be applied to connecting device of multichannel coiled tubing and generator which characterized in that includes:

the first connecting part, the second connecting part and the third connecting part are connected in sequence from top to bottom; one end of the first connecting part is used for being sleeved and fixedly connected with the outer peripheral wall of the multi-channel continuous oil pipe in a sealing manner; one end of the second connecting part is hermetically sleeved in the other end of the first connecting part; the third connecting part is connected with the other end of the second connecting part in a sealing manner, and meanwhile, the third connecting part is used for communicating an inner pipe in the multi-channel continuous oil pipe with an internal pipeline of the generator in a sealing manner; and

clasping device, its cover is established on multichannel coiled tubing's the periphery wall, simultaneously, be located first connecting portion with between the second connecting portion, wherein, clasping device constructs into: in the process that the first connecting portion and the second connecting portion are connected, the holding device can gradually hold the peripheral wall of the multi-channel continuous oil pipe tightly.

2. The connection device applied to the multichannel coiled tubing and the generator as claimed in claim 1, wherein the clasping device is configured as an annular sleeve, an opening is formed on an annular wall of the annular sleeve along the axial direction, the outer peripheral wall of the annular sleeve is configured as a first inclined surface, a second inclined surface is formed in one end of the second connection part, which is abutted to the clasping device, and the second inclined surface is configured as: the second inclined surface can gradually reduce the size of the opening in a process of connecting the first connection portion and the second connection portion.

3. The connection device for the multichannel coiled tubing and the generator as claimed in claim 2, wherein the annular sleeve is formed with a plurality of teeth on the inner peripheral wall surface, and the teeth are vertically and/or horizontally arranged.

4. The connection device applied to the multi-channel coiled tubing and the generator as claimed in any one of claims 1 to 3, wherein the first connection part comprises a first sleeve joint section and a second sleeve joint section which are coaxially connected, the first sleeve joint section is used for being fixedly connected with the multi-channel coiled tubing in a sealing mode, an annular cavity is formed between the second sleeve joint section and the outer peripheral wall of the multi-channel coiled tubing, and an internal thread structure is formed on the inner peripheral wall of the second sleeve joint section; the holding device is arranged in the annular cavity, one end of the second connecting portion is located in the annular cavity and abutted against the holding device, and one end of the second connecting portion is in threaded connection with the second sleeving section.

5. The connection device for the multi-channel coiled tubing and the generator as claimed in claim 4, wherein the outer peripheral wall of the first socket section is formed with a plurality of threaded holes therethrough along a radial direction.

6. The connection device applied to the multichannel coiled tubing and the generator as claimed in claim 4, further comprising a gasket abutting between the first casing section and the clasping device.

7. The connecting device applied to the multichannel coiled tubing and the generator as claimed in claim 4, wherein the second connecting part comprises a third sleeve connecting section and a barrel connecting section which are coaxially connected, the third sleeve connecting section is connected with the first connecting part, and the peripheral wall of the third sleeve connecting section is formed with an annular groove for installing a sealing ring; and a flange structure connected with the third connecting part is formed at the end part of the cylinder connecting section.

8. The connecting device applied to the multichannel coiled tubing and the generator as claimed in claim 7, wherein the third connecting part is configured as a plate-shaped flange, and an annular groove is formed on the surface of the third connecting part, which is attached to the second connecting part, and is used for installing a sealing ring.

9. The connecting device applied to the multichannel coiled tubing and the generator as claimed in claim 8, wherein the third connecting part is provided with a cable joint, a plurality of inner tube outlets and an annular outlet along the axial direction; the cable joint is used for electrically connecting a cable in the multi-channel continuous oil pipe and an internal cable of the generator; the outlet of the inner pipe is used for communicating the inner pipe in the multi-channel continuous oil pipe with a pipeline inside the generator; one end of the annular outlet is communicated with the connecting section of the cylinder body, and the other end of the annular outlet is used for being connected with a pipeline inside the generator.

10. The connecting device applied to the multichannel coiled tubing and the generator as claimed in claim 9, further comprising a metal hose for connecting the inner tube in the multichannel coiled tubing with one end of the outlet of the inner tube, wherein two ends of the metal hose are respectively in threaded connection with one ends of the inner tube in the multichannel coiled tubing and the outlet of the inner tube.

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