Multi-channel pipe with positioning structure and area identification

Abstract

The invention relates to the technical field of petroleum engineering, in particular to a multi-channel pipe with a positioning structure and area recognition, which comprises a first outer protective pipe, an armored pipe and a rubber pipe which are sequentially sleeved together from outside to inside, and a plurality of cables are laid in the rubber pipe. The plurality of cables are fixed in the rubber tube through a plurality of clamping groups which are arranged at intervals; the clamping group comprises a clamping sleeve, a plurality of cable holes sleeved with the cables are formed in the clamping sleeve, a plurality of supporting legs are arranged on the outer wall of the clamping sleeve, and the supporting legs are fixed to the inner wall of the rubber pipe. According to the invention, different colors are used for identifying different pipe cables to carry out area identification; the card group has a multi-channel structure, so that the diversity of functions is increased; and meanwhile, a layer of rubber pipe and an armor are added, so that the service life is greatly prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum engineering, and in particular to a multi-channel pipe with a positioning structure and area identification. Background Art

[0002] Coiled tubing, also known as flexible tubing, can be up to 10,000 meters long and can replace conventional tubing for many operations. Coiled tubing operation equipment has the characteristics of pressure operation and continuous lifting and lowering. The equipment is small in size, has a fast operation cycle and low cost. It is widely used in oil and gas field well repair, drilling, completion, logging and other operations, and runs through the entire process of oil and gas extraction. Taking logging as an example, coiled tubing logging technology is a new technology promoted in the field of oil and gas field well testing in recent years. The technical outline is: the cable is passed through and encapsulated in the coiled tubing, the end of the coiled tubing is connected to the logging instrument, and the ground equipment is used to rely on the stiffness and toughness of the coiled tubing itself to send the logging instrument to the target well section for testing. Depending on the depth of the logging, the length of the coiled tubing can reach several thousand meters or even 10,000 meters.

[0003] However, during construction, it is often found that the cables in such a long continuous tubing often break. One of the reasons is that since the diameter of the cable is smaller than the diameter of the tubing (i.e., the tubing and the cable are separated), when the production is completed and the continuous tubing with the cable placed inside is completed and reeled up, the cable will be attached to the inside of the continuous tubing. When used downhole, the cable is usually not attached to the inside of the continuous tubing, but in the center. In order to align the two ends of the cable with the two ends of the continuous tubing, the length requirement for the tubing when the cable is in the center of the tubing is greater than the length requirement when the cable is attached to the inside of the continuous tubing when reeling. Therefore, when the cable changes from the reeling state to the operation center state, it will break due to the increased length requirement.

[0004] In the prior art, a Chinese invention patent with application number 201710122020.X discloses a continuous pipe cable with a limited inner clamp. A clamping sleeve is arranged at a certain interval on the outside of the cable. The two ends of the sleeve are positioned between the limited inner clamps. The limited inner clamps are welded to the inner wall of the continuous oil pipe. The sleeve is made of rigid or elastic material, and is interference-fitted and clamped with the surface of the cable. When the continuous pipe cable is in use, on the one hand, most of the deadweight of the cable can be borne by the limited inner clamp, and on the other hand, it can basically ensure that the cable and the continuous oil pipe maintain basically the same length, ensuring that the cable is not easily broken when the continuous pipe cable is bent or straightened.

[0005] The above-mentioned continuous pipe cable with a limit inner clamp has the following problems: the clamping sleeve is a single-channel single-positioning clamp with a single function; the limit inner clamp is welded to the inner wall of the continuous oil pipe and has a short service life. Summary of the invention

[0006] Based on the above problems, the purpose of the present invention is to provide a multi-channel tube with a positioning structure and area identification. The present invention adopts the following technical solutions:

[0007] The present invention provides a multi-channel tube with a positioning structure and area identification, comprising a first outer protective tube, an armored tube and a rubber tube which are sequentially sheathed together from outside to inside, a plurality of cables are laid in the rubber tube, and the plurality of cables are fixed in the rubber tube by a plurality of card groups arranged at intervals;

[0008] The card assembly comprises a card sleeve, on which a plurality of wire holes for fitting the cable sleeve are arranged, and on the outer wall of the card sleeve a plurality of legs are arranged, and the legs are fixed to the inner wall of the rubber tube.

[0009] Preferably, the ferrule comprises two card blocks assembled together, and wire grooves are arranged on the joint surfaces of the two card blocks, and the wire grooves on the two card blocks are assembled corresponding to each other to form the wire hole.

[0010] Preferably, the ferrule is circular; and two wire holes are provided on the ferrule.

[0011] Preferably, the leg is provided with a groove at one end away from the ferrule, a ball and an elastic member are provided in the groove, one end of the elastic member abuts against the ball, and the other end abuts against the bottom of the groove, and the area of ​​the groove other than the ball and the elastic member is filled with hot melt adhesive;

[0012] When the hot melt adhesive is melted after being subjected to high temperature, the ball is ejected from the groove under the action of the elastic member and abuts against the limiting groove reserved on the inner wall of the rubber tube, and the limiting groove is arranged circumferentially along the inner wall of the rubber tube.

[0013] Preferably, the elastic member is a spring.

[0014] Preferably, a guide groove for slidingly cooperating with the ball is provided on the inner wall of the rubber tube, and the guide groove is axially arranged along the inner wall of the rubber tube.

[0015] Preferably, each of the cables has an identification mark, and the identification marks on each of the cables are different.

[0016] Preferably, the cable comprises a conductor core, an insulating layer, and an outer sheath which are sequentially sheathed together from inside to outside.

[0017] Preferably, a second outer protective tube is provided on the outer side of the outer protective layer; and the identification mark is the color of the outer side of the outer protective layer.

[0018] Compared with the prior art, the beneficial technical effects of the present invention are:

[0019] (1) The present invention uses different colors to identify different cables and pipes for regional identification;

[0020] (2) The card set of the present invention has a multi-channel structure, which increases the diversity of functions;

[0021] (3) The present invention adds a layer of rubber tube and armor, which greatly prolongs the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 It is a structural schematic diagram of a multi-channel tube with a positioning structure and area identification according to the present invention;

[0024] Figure 2 This is a schematic diagram of the main structure of the card set of the present invention;

[0025] Figure 3 The figure is a schematic diagram of the arrangement structure of the limit groove in the rubber tube of the present invention.

[0026] Explanation of the accompanying drawings: 1. first outer protective tube; 2. armored tube; 3. rubber tube; 301. limit groove; 302. guide groove; 4. cable; 401. conductor core; 402. insulation layer; 403. outer protective layer; 404. second outer protective tube; 5. card group; 501. card sleeve; 501-1. card block; 501-2. wire groove; 502. wire hole; 503. support leg; 503-1. groove; 503-2. ball; 503-3. elastic part. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] like Figures 1 to 3 As shown, the present embodiment discloses a multi-channel tube with a positioning structure and area identification, comprising a first outer protective tube 1, an armored tube 2 and a rubber tube 3 which are sequentially inserted together from the outside to the inside, a plurality of cables 4 are laid in the rubber tube 3, and the plurality of cables 4 are fixed in the rubber tube 3 by a plurality of card groups 5 arranged at intervals.

[0029] The card assembly 5 includes a card sleeve 501 , on which a plurality of wire holes 502 for fitting with the cables 4 are arranged, and on the outer wall of the card sleeve 501 a plurality of legs 503 are arranged, and the legs 503 are fixed to the inner wall of the rubber tube 3 .

[0030] In this embodiment, the sleeve 501 includes two assembled blocks 501-1. The two blocks 501-1 can be fixed together by electric welding after assembly. Wire grooves 501-2 are provided on the joint surfaces of the two blocks 501-1. The wire grooves 501-2 on the two blocks 501-1 correspond to each other and are assembled to form wire holes 502.

[0031] In this embodiment, the ferrule 501 is circular; two wire holes 502 are provided on the ferrule 501, and the number of cables 4 is two.

[0032] In this embodiment, a groove 503-1 is provided at the end of the leg 503 away from the ferrule 501, and a ball 503-2 and an elastic member 503-3 are provided in the groove 503-1. One end of the elastic member 503-3 abuts against the ball 503-2, and the other end abuts against the bottom of the groove 503-1. The area in the groove 503-1 except for the ball 503-2 and the elastic member 503-3 is filled with hot melt adhesive; when the hot melt adhesive melts after being subjected to high temperature, the ball 503-2 pops out of the groove 503-1 under the action of the elastic member 503-3, and abuts against the limiting groove 301 reserved on the inner wall of the rubber tube 3. The limiting groove 301 is opened along the circumference of the inner wall of the rubber tube 3. By using this technology, the card group 5 can be easily fixed in the rubber tube 3.

[0033] In this embodiment, a guide groove 302 for rolling and sliding with the ball 503-2 is provided on the inner wall of the rubber tube 3, and the guide groove 302 is arranged axially along the inner wall of the rubber tube 3. In the initial state, the ball 503-2 is partially exposed in the groove 503-1, and the depth of the guide groove 302 is less than the depth of the limiting groove 301.

[0034] In this embodiment, the elastic member 503 - 3 is a spring.

[0035] In this embodiment, each cable 4 has an identification mark, and the identification marks on each cable 4 are different. The function of the cable 4 can be identified through the identification mark, which is convenient for distinction.

[0036] In this embodiment, the cable 4 includes a conductor core 401 , an insulating layer 402 , and an outer sheath 403 which are sequentially sheathed together from the inside to the outside. In this embodiment, the identification mark is the color of the outer sheath 403 .

[0037] In this embodiment, a second outer protective tube 404 is sleeved on the outer side of the outer protective layer 403. The first outer protective tube 1 and the second outer protective tube 404 are both stainless steel tubes.

[0038] The production process of the present invention:

[0039] Cable production: The steel strip is subjected to a rolling device to produce a preliminary U-deformation to facilitate the formation of the shape of the continuous oil pipe; the colored outer sheath 403 (the outer sheath 403 already contains the conductor core 401 and the insulation layer 402) is placed in the U-shaped steel strip, and the U-shaped steel strip is again subjected to a rolling device to form a tubular shape, and then laser welded to form a second outer sheath tube 404 in the form of an armor.

[0040] Install the card group: install a card group 5 on the cable 4 at a certain interval along the length direction.

[0041] Production of rubber tube: Put rubber material and filler into a mixer, extrude at a head temperature of 140±10°C, a tail temperature of 180±10°C, and an extrusion speed of 6±0.5m / min. After extrusion by the head mold, grooves are cut inside the rubber tube 3 to form a limit groove 301 and a guide groove 302.

[0042] Assemble the cable with the card group in the rubber tube: insert the cable 4 with the card group 5 into the rubber tube 3, turn on the air pump to fill the rubber tube 3 with compressed gas from the air pump, use the air volume of the compressed gas to push the card group 5 into the rubber tube 3, and the ball 503-2 partially exposed on the card group 5 slides forward along the guide groove 302 in the rubber tube 3. The cable 4 is positioned by the meter meter to facilitate the determination of the position of the card group 5. Then, the rubber tube 3, the cable 4 and the card group 5 are sent to the steamer together for overall heating. When the temperature rises to above 60°C, the hot melt adhesive on the card group 5 will melt, and the ball 503-2 will pop out and be fixed to the limit groove 301 on the inner wall of the rubber tube 3. Since the depth of the guide groove 302 is less than the depth of the limit groove 301, there is a height difference between the limit groove 301 and the guide groove 302. That is, when the ball 503-2 pops out, the card group 5 will not exit in the opposite direction along the guide groove 302.

[0043] Armor winding: a stainless steel strip is wound around the outer wall of the rubber tube 3 to form an armored tube 2, and then the armored tube 2 is welded to a continuous steel strip, and then the continuous steel strip is processed again to produce a first outer protective tube 1.

[0044] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A multi-channel tube with positioning structure and area identification, characterized in that: It comprises a first outer protective tube (1), an armored tube (2) and a rubber tube (3) which are sequentially sheathed together from the outside to the inside, a plurality of cables (4) are laid in the rubber tube (3), and the plurality of cables (4) are fixed in the rubber tube (3) by a plurality of card groups (5) arranged at intervals; The card assembly (5) comprises a card sleeve (501), on which a plurality of wire holes (502) for fitting with the cable (4) are arranged, and on the outer wall of the card sleeve (501) a plurality of legs (503) are arranged, and the legs (503) are fixed to the inner wall of the rubber tube (3).

2. The multi-channel tube with positioning structure and area identification according to claim 1, characterized in that: The clamping sleeve (501) comprises two clamping blocks (501-1) assembled together, and a wire groove (501-2) is provided on the joint surface of the two clamping blocks (501-1). The wire grooves (501-2) on the two clamping blocks (501-1) are assembled corresponding to each other to form the wire hole (502).

3. The multi-channel tube with positioning structure and area identification according to claim 1, characterized in that: The ferrule (501) is circular; and two thread holes (502) are provided on the ferrule (501).

4. The multi-channel tube with positioning structure and area identification according to claim 1, characterized in that: The leg (503) is provided with a groove (503-1) at one end away from the ferrule (501), a ball (503-2) and an elastic member (503-3) are provided in the groove (503-1), one end of the elastic member (503-3) abuts against the ball (503-2), and the other end abuts against the bottom of the groove (503-1), and the area of ​​the groove (503-1) other than the ball (503-2) and the elastic member (503-3) is filled with hot melt adhesive; When the hot melt adhesive is melted after being exposed to high temperature, the ball (503-2) pops out from the groove (503-1) under the action of the elastic member (503-3) and abuts against a limiting groove (301) reserved on the inner wall of the rubber tube (3), wherein the limiting groove (301) is arranged circumferentially along the inner wall of the rubber tube (3).

5. The multi-channel tube with positioning structure and area identification according to claim 4, characterized in that: The elastic member (503-3) is a spring.

6. The multi-channel tube with positioning structure and area identification according to claim 4, characterized in that: A guide groove (302) for slidingly cooperating with the ball (503-2) is provided on the inner wall of the rubber tube (3), and the guide groove (302) is arranged axially along the inner wall of the rubber tube (3).

7. The multi-channel tube with positioning structure and area identification according to claim 1, characterized in that: Each of the cables (4) has an identification mark, and the identification marks on each of the cables (4) are different.

8. The multi-channel tube with positioning structure and area identification according to claim 7, characterized in that: The cable (4) comprises a conductor core (401), an insulating layer (402), and an outer sheath (403) which are sequentially sheathed together from the inside to the outside.

9. The multi-channel tube with positioning structure and area identification according to claim 7, characterized in that: A second outer protective tube (404) is provided outside the outer protective layer (403); The identification mark is the color of the outer surface of the outer protective layer (403).

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