Logging cable and manufacturing method thereof

Abstract

The invention discloses a logging cable and a manufacturing method thereof. The logging cable comprises a tensile stress tube, a protective tube located in the tensile stress tube, a wire and an optical fiber which are arranged in the protective tube, and a filling layer filled in the protective tube. Equipment used in the preparation process comprises a supporting platform used for supporting the protective tube and locking and positioning mechanisms arranged at the two ends of the protective tube and used for correcting the positions of the wire and the optical fiber. According to the invention, the telescopic cylinder is used for controlling the split clamping seat in the fixed frame, so that the wire and the optical fiber entering the protective tube can be effectively clamped; therefore, in the processing process, a plurality of optical fibers are uniformly arranged around the wire in the protection tube, and the problems that the optical fibers are twisted and interfered by the cable are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of well logging cables, and in particular to a well logging cable and a manufacturing method thereof. Background Art

[0002] The existing working conditions in oil wells are relatively harsh. They are often in an environment of high temperature, high pressure, and corrosive media such as oil and gas. In addition, due to the narrow space of the oil well casing, cables are often bent or corroded during installation. At the same time, some hydraulic equipment in the mine needs to be connected to the ground through pipelines.

[0003] In the prior art, patent application number CN201610008224.6 provides a method for manufacturing a continuous oil pipe containing a logging cable, including the following steps: supplying a steel strip from a supply reel to a cleaning device, using an alkaline degreasing liquid to remove impurities on the surface of the steel strip; passing the steel strip through a rolling device; supplying an armored logging cable or a logging cable coated with a high-temperature resistant thermal insulation ceramic coating to the steel strip; passing the steel strip through a tube forming device to form the shape of a continuous oil pipe; using a laser welding method to weld the seams of the steel strip into one piece; normalizing the weld, sizing the continuous oil pipe and heat treating the entire pipe; finishing and reeling the continuous oil pipe. The above method does not require additional equipment or steps to pass the logging cable through the continuous oil pipe, effectively solving the internal burr problem and groove corrosion problem of the continuous oil pipe in the prior art, and has broad application prospects.

[0004] However, in the prior art, with the development of detection elements, signals can be transmitted with the help of optical fibers. However, the existing logging cables only have conductors and lack facilities for transmitting signals by optical fibers. In addition, such optical fiber and cable composite pipelines are not easy to locate during manufacturing. Summary of the invention

[0005] The object of the present invention is to provide a logging cable and a manufacturing method thereof, so as to solve the problem that the optical fiber and the cable composite pipeline used in the conventional logging cable are inconvenient to position during manufacturing.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The invention provides a logging cable, comprising a tensile stress tube, a protective tube located in the tensile stress tube, a conductor and an optical fiber arranged in the protective tube, and a filling layer filled in the protective tube.

[0008] Furthermore, the protective tube is made of polypropylene (PP) material; the conductive wire includes a plurality of twisted wires and an insulating layer located outside the twisted wires.

[0009] Furthermore, the filling layer includes one or more of PVC, PE or EPDM.

[0010] The present invention provides a method for manufacturing a logging cable, wherein the equipment used comprises a supporting platform for supporting the protection tube, a locking and positioning mechanism arranged at both ends of the protection tube and used for correcting the position of the conductor and the optical fiber;

[0011] The locking and positioning mechanism comprises a fixed frame, a plurality of split card seats arranged in the fixed frame, and a plurality of telescopic cylinders arranged on the fixed frame and used for driving the plurality of split card seats to be spliced; a wire limiting groove adapted to the wire is provided on the side wall of the split card seat, and a fiber limiting groove adapted to the optical fiber is also provided on the side wall of the split card seat; the wire limiting groove and the fiber limiting groove are both arc-shaped groove structures.

[0012] Furthermore, the telescopic cylinder is an electric telescopic cylinder.

[0013] Furthermore, a heating jacket for heating the filling layer in the protection tube is provided on the support platform;

[0014] A plurality of heating tubes are arranged on the inner peripheral wall of the heating sleeve; the heating tubes are quartz heating tubes.

[0015] Furthermore, when processing the protection tube and the interior;

[0016] First, multiple telescopic cylinders on the front and rear fixed frames are controlled and adjusted to simultaneously contract, so as to drive the multiple split card seats to stagger the gaps;

[0017] Next, the wire wound up on the wire winding mechanism is sequentially passed through the through hole formed by the wire limiting groove on the split clamping seat, and then passed through the through hole formed by the wire limiting groove on the split clamping seat on the other end fixing frame after entering the protection tube;

[0018] Then, the optical fiber wound up on the optical fiber winding mechanism is sequentially passed through the through hole formed by the optical fiber limiting groove on the split card seat, and then passed through the through hole formed by the optical fiber limiting groove on the split card seat on the other end fixed frame after entering the protective tube;

[0019] Next, a plurality of telescopic cylinders on a fixed frame away from the optical fiber winding mechanism and the wire winding mechanism are controlled to simultaneously adjust the split clamping seats to move closer to each other, so as to achieve clamping and positioning of the optical fiber and the wire;

[0020] Then, the optical fiber is rolled up by the optical fiber rolling mechanism, and the wire rolling up mechanism rolls up the wire at the same time, so that the wire is located on the axis of the protection tube, and a plurality of optical fibers are evenly arranged around the wire in the protection tube;

[0021] Next, the filling layer is injected into the protection tube; finally, the heating sleeve is used to heat and melt the filling layer in the protection tube, and then the heating sleeve is cooled and formed; wherein a guide rail is provided on the support platform to facilitate the sliding of the heating sleeve.

[0022] Furthermore, when the protection tube is wrapped around the tensile stress tube;

[0023] The steel coil raw material used to produce the tensile stress tube is placed on the steel strip winding equipment, and the curled and wound protective tube is placed on the cable winding equipment. The starting end of the steel coil raw material passes through the steel tube preliminary forming equipment, the cable winding equipment, the steel tube laser welding equipment, the non-destructive testing equipment, the steel tube drawing equipment, and the traction equipment in sequence, and then is processed into a set of the tensile stress tube with the outer part of the protective tube; the tensile stress tube is curled and wound under the action of the cable protective tube winding equipment to be used in the next process; the steel strip is processed into a U shape after passing through the steel tube preliminary forming equipment, and the protective tube is placed in the tensile stress tube through the U-shaped opening. During the placement process, it needs to pass through a guide wheel, and the guide wheel presses down the protective tube to make it close to the bottom surface of the tensile stress tube to avoid high temperature damage to the protective tube during laser welding.

[0024] Compared with the prior art, the beneficial technical effects of the present invention are:

[0025] In the present invention, a telescopic cylinder is used to control a split clamp in a fixed frame to effectively clamp the wires and optical fibers entering the protective tube; thereby, during processing, multiple optical fibers are evenly arranged around the wires in the protective tube to avoid optical fiber distortion and interference by cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Figure 1 It is a schematic diagram of the structural cross section of the well logging cable of the present invention;

[0028] Figure 2 This is a schematic diagram of cable processing in the well logging cable of the present invention;

[0029] Figure 3 It is a schematic diagram of the fixing frames at both ends of the logging cable of the present invention;

[0030] Figure 4 It is a schematic diagram of the heating mechanism in the manufacturing of the logging cable of the present invention;

[0031] Figure 5 for Figure 3 Schematic diagram of the end face of the middle fixed frame;

[0032] Figure 6 for Figure 5Schematic diagram of the adjustment structure of the fixed frame;

[0033] Figure 7 The figure is a schematic diagram of the manufacturing process of the logging cable of the present invention.

[0034] Explanation of the reference numerals: 100, tensile stress tube; 101, protective tube; 102, optical fiber; 1021, optical fiber winding mechanism; 103, conductor; 1031, conductor winding mechanism; 104, filling layer; 200, fixing frame; 201, telescopic cylinder; 300, split holder; 301, optical fiber limiting groove; 302, conductor limiting groove; 400, heating sleeve; 401, heating tube. DETAILED DESCRIPTION

[0035] like Figure 1 As shown, this embodiment discloses a logging cable including a tensile stress tube 100, a protective tube 101 located in the tensile stress tube 100, a wire 103 and an optical fiber 102 installed in the protective tube 101, and a filling layer 104 filled in the protective tube 101.

[0036] In a specific implementation, the protective tube 101 is made of polypropylene PP material; the conductor 103 includes multiple strands of twisted wires and an insulating layer outside the strands; wherein the insulating layer is made of fluorinated ethylene propylene copolymer FEP material. The filling layer 104 includes one or more of PVC, PE or EPDM.

[0037] This embodiment provides a method for manufacturing a logging cable, such as Figure 2 As shown, the equipment used includes a supporting platform for supporting the protective tube 101 , and a locking and positioning mechanism installed at both ends of the protective tube 101 and used for position correction of the wire 103 and the optical fiber 102 .

[0038] The locking and positioning mechanism comprises a fixed frame 200, a plurality of split card seats 300 installed in the fixed frame 200, and a plurality of telescopic cylinders 201 installed on the fixed frame 200 and used to drive the plurality of split card seats 300 to be spliced; a wire limiting groove 302 adapted to the wire 103 is provided on the side wall of the split card seat 300, and an optical fiber limiting groove 301 adapted to the optical fiber 102 is also provided on the side wall of the split card seat 300; both the wire limiting groove 302 and the optical fiber limiting groove 301 are arc-shaped groove structures; the wire 103 and the optical fiber 102 are effectively clamped by means of the arc-shaped structures of the wire limiting groove 302 and the optical fiber limiting groove 301.

[0039] In the present embodiment, the telescopic cylinder 201 is an electric telescopic cylinder, so as to facilitate synchronous control of the three telescopic cylinders 201 at the same time; specifically, the telescopic ends of the telescopic cylinder 201 are respectively connected to the split card seat 300; in specific implementation, a guide rod is also installed on the outer wall of the split card seat 300, and a shaft sleeve adapted to the guide rod is opened in the fixed frame 200 to ensure the linear movement of the split card seat 300.

[0040] like Figure 4 As shown, in this embodiment, a heating sleeve 400 for heating the filling layer 104 in the protective tube 101 is installed on the supporting platform; a plurality of heating tubes 401 are installed on the inner circumferential wall of the heating sleeve 400; the heating tubes 401 are quartz heating tubes; in specific implementation, a guide rail is prefabricated on the supporting platform to facilitate the sliding of the heating sleeve 400.

[0041] In this embodiment, when processing the protection tube 101 and the interior thereof;

[0042] First, control and adjust the multiple telescopic cylinders 201 on the front and rear fixed frames 200 to shrink simultaneously, so as to drive the multiple split holders 300 to stagger the gaps; then, the wire wound on the wire winding mechanism 1031 is passed through the through hole formed by the wire limiting groove 302 on the split holder 300 in sequence, and enters the protective tube 101 and then passes through the through hole formed by the wire limiting groove 302 on the split holder 300 on the fixed frame 200 at the other end; then, the optical fiber wound on the optical fiber winding mechanism 1021 is passed through the through hole formed by the optical fiber limiting groove 301 on the split holder 300 in sequence, and enters the protective tube 101 and then passes through the through hole formed by the optical fiber limiting groove 301 on the split holder 300 on the fixed frame 200 at the other end. through hole; then, controlling the multiple telescopic cylinders 201 on the fixed frame 200 away from the optical fiber winding mechanism 1021 and the wire winding mechanism 1031 to simultaneously adjust the split clamping seat 300 to be close to each other, so as to achieve the clamping and positioning of the optical fiber and the wire; then, using the optical fiber winding mechanism 1021 to wind up the optical fiber, and at the same time, the wire winding mechanism 1031 to wind up the wire; so that the wire is located on the axis of the protective tube 101, and multiple optical fibers are evenly arranged around the wire in the protective tube 101; then, injecting the filling layer 104 into the protective tube 101; finally, using the heating sleeve 400 to heat and melt the filling layer 104 in the protective tube 101, and then cooling and shaping.

[0043] When the protection tube 101 is wrapped around the tensile stress tube 100;

[0044] The steel coil raw material used to produce the tensile stress tube 100 is placed on the steel strip winding device, and the curled and wound protection tube 101 is placed on the cable winding device. The starting end of the steel coil raw material passes through the steel tube preliminary forming device, the cable winding device, the steel tube laser welding device, the non-destructive flaw detection device, the steel tube drawing device, and the traction device in sequence, and then is processed into a set of the tensile stress tube 100 with the outer part of the protection tube 101; the tensile stress tube 100 is curled and wound under the action of the cable protection tube winding device to be used in the next process; the steel strip is processed into a U shape after passing through the steel tube preliminary forming device, and the protection tube 101 is placed in the tensile stress tube 100 through the U-shaped opening. During the placing process, it needs to pass through a guide wheel, and the guide wheel presses down the protection tube 101 to make it close to the bottom surface of the tensile stress tube 100 to avoid high temperature damage to the protection tube 101 during laser welding.

[0045] The above embodiments are only descriptions of the preferred methods of the invention, and are not intended to limit the scope of the invention. Without departing from the design spirit of the invention, various modifications and improvements made to the technical solutions of the invention by ordinary technicians in this field should fall within the protection scope of the claims of the invention.

Claims

1. A logging cable, characterized in that: The invention comprises a tensile stress-resistant tube (100), a protective tube (101) located inside the tensile stress-resistant tube (100), a conductive wire (103) and an optical fiber (102) arranged inside the protective tube (101), and a filling layer (104) filled inside the protective tube (101).

2. The logging cable according to claim 1, characterized in that: The protective tube (101) is made of polypropylene (PP) material; the conductor (103) comprises a plurality of twisted wires and an insulating layer located outside the twisted wires.

3. The logging cable according to claim 1, characterized in that: The filling layer (104) includes one or more of PVC, PE or EPDM.

4. A method for manufacturing a logging cable, according to the logging cable of claim 1, characterized in that: The equipment used includes a support platform for supporting the protection tube (101), and a locking and positioning mechanism arranged at both ends of the protection tube (101) and used for correcting the positions of the wire (103) and the optical fiber (102); The locking and positioning mechanism comprises a fixing frame (200), a plurality of split card seats (300) arranged in the fixing frame (200), and a plurality of telescopic cylinders (201) arranged on the fixing frame (200) and used for driving the plurality of split card seats (300) to be spliced; a wire limiting groove (302) adapted to the wire (103) is provided on the side wall of the split card seat (300), and an optical fiber limiting groove (301) adapted to the optical fiber (102) is also provided on the side wall of the split card seat (300); and both the wire limiting groove (302) and the optical fiber limiting groove (301) are arc-shaped groove structures.

5. The method for manufacturing a logging cable according to claim 4, characterized in that: The telescopic cylinder (201) is an electric telescopic cylinder.

6. The method for manufacturing a logging cable according to claim 5, characterized in that: A heating jacket (400) for heating the filling layer (104) in the protection tube (101) is arranged on the support platform; A plurality of heating tubes (401) are arranged on the inner peripheral wall of the heating sleeve (400); the heating tubes (401) are quartz heating tubes.

7. The method for manufacturing a logging cable according to claim 6, characterized in that: When processing the protection tube (101) and its interior; Firstly, a plurality of telescopic cylinders (201) on the two front and rear fixed frames (200) are controlled and adjusted to simultaneously contract, so as to drive the plurality of split card seats (300) to stagger the gaps between them; Next, the wire wound up on the wire winding mechanism (1031) is sequentially passed through the through hole formed by the wire limiting groove (302) on the split clamp (300), enters the protection tube (101), and then passes through the through hole formed by the wire limiting groove (302) on the split clamp (300) on the other end fixing frame (200); Then, the optical fiber wound up on the optical fiber winding mechanism (1021) is sequentially passed through the through hole formed by the optical fiber limiting groove (301) on the split clamping seat (300), enters the protection tube (101), and then passes through the through hole formed by the optical fiber limiting groove (301) on the split clamping seat (300) on the other end fixing frame (200); Next, a plurality of telescopic cylinders (201) on a fixed frame (200) away from the optical fiber winding mechanism (1021) and the wire winding mechanism (1031) are controlled to simultaneously adjust the split clamping seats (300) to move closer together, so as to achieve clamping and positioning of the optical fiber and the wire; Then, the optical fiber is rolled up using the optical fiber rolling mechanism (1021), and the wire rolling mechanism (1031) is used to roll up the wire at the same time, so that the wire is located on the axis of the protective tube (101), and a plurality of optical fibers are evenly arranged around the wire in the protective tube (101); Next, the filling layer (104) is injected into the protective tube (101); finally, the filling layer (104) in the protective tube (101) is heated and melted by using the heating sleeve (400), and then cooled and shaped; wherein a guide rail is provided on the support platform to facilitate the sliding of the heating sleeve (400).

8. The method for manufacturing a logging cable according to claim 7, characterized in that: When the protection tube (101) is covered on the tensile stress tube (100); The steel coil material used to produce the tensile stress tube (100) is placed on a steel strip winding device, and the rolled and wound protection tube (101) is placed on a cable winding device. The starting end of the steel coil material passes through a steel tube preliminary forming device, a cable winding device, a steel tube laser welding device, a non-destructive flaw detection device, a steel tube drawing device, and a pulling device in sequence, and is then processed into a set of the tensile stress tube (100) provided with the outer part of the protection tube (101); the tensile stress tube (100) is rolled and wound under the action of the cable protection tube winding device to be used in the next process; the steel strip is processed into a U shape after passing through the steel tube preliminary forming device, and the protection tube (101) is placed into the tensile stress tube (100) through the U-shaped opening. During the placing process, the protection tube (101) needs to pass through a guide wheel, and the guide wheel presses down the protection tube (101) to make it close to the bottom surface of the tensile stress tube (100) to avoid high temperature damage to the protection tube (101) during laser welding.

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