Controllable self-suspending multifunctional continuous cable tube

Abstract

The application discloses a controllable self-suspension multifunctional continuous cable pipe, and belongs to the technical field of drilling, well drilling, ocean, polar region and the like, and comprises an inner pipe, a self-suspension adjusting pipe, a fluid well pipe, an armored cable, a fixed clamping mechanism, an outer pipe and a self-cooling heat insulation pipe; wherein the inner pipe and the outer pipe are concentrically arranged, the self-suspension adjusting pipe, the fluid well pipe, the armored cable and the self-cooling heat insulation pipe are uniformly distributed in the annular gap between the inner pipe and the outer pipe, and are clamped and fixed by the fixed clamping mechanism; the self-suspension adjusting pipe is of a U-shaped structure, and the self-suspension adjusting pipe is open at both ends; a fluid pump is connected to an A end of the self-suspension adjusting pipe, and a gas is introduced into a B end of the self-suspension adjusting pipe; the overall specific gravity of the cable pipe is controlled by changing the mass of the filling medium in the self-suspension adjusting pipe, so that the overall specific gravity of the cable pipe is always kept equal to the density of the drilling fluid, and thus the suspension state is achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of drilling, well drilling, ocean, polar and the like, and particularly relates to a controllable self-suspension multifunctional continuous cable pipe. BACKGROUND

[0002] The working environment of the continuous cable pipe can be in mud, fresh water, seawater or different fluids in the pipeline. At present, the continuous cable pipe used in the fields of drilling, well drilling, ocean, polar and the like, due to its own weight, after reaching a certain length, not only increases the capacity requirement of the continuous cable pipe storage equipment, but also increases the power requirement of the equipment, and the self-weight of the continuous cable pipe affects its tensile resistance, that is, the self-weight of the continuous cable pipe long enough will break itself. Therefore, the application of "a self-balancing ultra-low specific gravity continuous cable pipe for a drilling tool system" with application number CN202120105160.8 is invented, which can greatly extend the ultimate length and reduce the storage power of the storage equipment, solving part of the problem. However, in the face of different fluid environment media, it is still impossible to achieve a suspended state. Therefore, it is necessary and significant to study a controllable self-suspension multifunctional continuous cable pipe which can control its suspended state in the environment medium. SUMMARY

[0003] The purpose of the present application is to design a continuous cable pipe which can meet the requirements of different fluid environment media and can always be in a suspended state by controlling the weight of the continuous cable pipe according to the density of different fluid environment media. The multifunctional performance of the continuous cable pipe is that it has the functions of transmitting electricity, transmitting signals, conveying various fluids, adjusting self-weight and resisting tension, compression, bending and torsion at the same time. Through the self-suspension characteristics of the multifunctional continuous cable pipe in the fluid environment medium, the length of the continuous cable pipe is not limited, and the stable, continuous and efficient characteristics of different functions can be given to the continuous cable pipe, so as to ensure that the terminal equipment or instrument can successfully complete the work.

[0004] A controllable self-suspension multifunctional continuous cable pipe comprises an inner pipe, a self-suspension adjusting pipe, a fluid into well pipe, an armored cable, a fixed clamping mechanism, an outer pipe and a self-cooling heat insulation pipe; wherein the inner pipe and the outer pipe are arranged concentrically, the self-suspension adjusting pipe, the fluid into well pipe, the armored cable and the self-cooling heat insulation pipe are uniformly distributed in the annular gap between the inner pipe and the outer pipe, and are clamped and fixed by the fixed clamping mechanism.

[0005] The self-suspension adjusting pipe is in a U-shaped structure, and the two ends of the self-suspension adjusting pipe are open. A fluid pump is connected to the A end of the self-suspension adjusting pipe, and gas is introduced into the B end of the self-suspension adjusting pipe. The overall specific gravity of the cable pipe is controlled by changing the mass of the filling medium in the self-suspension adjusting pipe, so that the overall specific gravity of the cable pipe is always equal to the density of the drilling fluid, thereby achieving a suspended state.

[0006] The beneficial effects of the present application are as follows:

[0007] 1. The present application can change according to the density change of the environmental medium fluid, and the coiled tubing can reach the suspended state by dynamically adjusting the weight of the filling medium in the coiled tubing, so as to avoid the problem of fatigue failure of the coiled tubing caused by excessive tension during the operation of the conventional coiled tubing.

[0008] 2. The present application is used in the fields of drilling, well drilling, ocean, polar region and the like, has the characteristics of large specific length, high efficiency, low winding and unwinding energy consumption, low operation cost and the like, has a wide application range, and is worth promoting. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 is a perspective view of the present application.

[0010] Figure 2 is Figure 1 a self-suspension adjusting pipe structure diagram.

[0011] Figure 3 is a structure diagram of the inner pipe placed in the outer pipe.

[0012] Figure 4 is a schematic diagram of the internal structure of the armored cable.

[0013] Figure 5 is a schematic diagram of the fluid into the well pipe structure.

[0014] Figure 6 is a schematic diagram of the self-cooling heat insulation pipe structure.

[0015] Figure 7 is a schematic diagram of the fixed clamping mechanism structure. DETAILED DESCRIPTION

[0016] Please refer to Figures 1 to 7 shown, a controllable self-suspension multifunctional coiled tubing, comprising an inner pipe 1, a self-suspension adjusting pipe 2, a fluid into the well pipe 3, an armored cable 4, a fixed clamping mechanism 5, an outer pipe 6 and a self-cooling heat insulation pipe 7; wherein the inner pipe 1 and the outer pipe 6 are arranged concentrically, the self-suspension adjusting pipe 2, the fluid into the well pipe 3, the armored cable 4 and the self-cooling heat insulation pipe 7 are uniformly distributed in the annular gap between the inner pipe 1 and the outer pipe 6, and are clamped and fixed by the fixed clamping mechanism 5;

[0017] The material of the self-suspension adjusting pipe 2 is light alloy, and the number is 2 or 4. The self-suspension adjusting pipe 2 is in U-shaped structure, and the two ends of the self-suspension adjusting pipe 2 are open. The A end of the self-suspension adjusting pipe 2 is connected with a fluid pump, and the B end of the self-suspension adjusting pipe 2 is connected with gas. By changing the mass of the filling medium in the self-suspension adjusting pipe 2, the overall specific gravity of the coiled tubing is controlled, so that the overall specific gravity of the coiled tubing is always equal to the density of the drilling fluid, so as to reach the suspended state.

[0018] Furthermore, the material of the inner pipe 1 is light alloy, and the inner pipe 1 serves as a circulating channel for another fluid.

[0019] Further, the armored cable 4 provides the terminal device or instrument with the required power, and the armored cable 4 comprises, from inside to outside, four copper cores 401, a shielding layer 402, an insulation layer 403 and an armored layer 404. The copper cores 401 are used for transmitting power, the shielding layer 402 is made of aluminum or other shielding materials and is used for preventing signal interference between strong and weak currents. The insulation layer 403 is made of resin or other insulating materials and plays an insulating role, and the armored layer 404 is made of lightweight alloy and plays a protective role.

[0020] Further, the fixing and clamping mechanism 5 plays a restraining role and is made of high-strength lightweight alloy. The fixing and clamping mechanism 5 is used for fixing the self-suspension adjusting pipe 2, the fluid inlet pipe 3, the armored cable 4 and the self-cooling and heat-insulating pipe 7. One fixing and clamping mechanism 5 is arranged every 1-5 m in the cable pipe to prevent the internal pipelines from deviating.

[0021] Further, the outer pipe 6 is made of lightweight alloy and plays a protective role for the internal pipelines, preventing the external fluid from directly contacting the strong and weak power cables, so that the whole system is more safe and reliable.

[0022] Further, the self-cooling and heat-insulating pipe 7 comprises, from inside to outside, a cooling liquid pipe 701, a heat-insulating layer 702 and an armored layer 703. The self-cooling and heat-insulating pipe 7 is used for carrying the heat generated in the drilling tool to the ground and is two in number. The cooling liquid pipe 701 is made of lightweight alloy, the heat-insulating layer 702 is made of silica alumina fiber or other heat-insulating materials, and the armored layer 703 is made of lightweight alloy.

[0023] Working principle and use process of the present application:

[0024] The controllable self-suspension multifunctional continuous cable pipe is connected with the double-bit self-balanced drilling tool. In the drilling process, the drilling fluid flows into the well through the fluid inlet pipe 3, flows out through the annular gap between the inner pipe 1 and the outer pipe 6 and the well wall, the armored cable 4 provides the drilling tool with the required power, the self-cooling and heat-insulating pipe 7 carries the heat generated in the drilling process to the ground, the outer pipe 6 plays a protective role, preventing the external fluid from directly contacting the strong and weak power cables, so that the whole system is more safe and reliable.

[0025] The overall specific gravity of the cable pipe can be adjusted according to the fluid density of the working environment, and the adjustable range is 0.8 g / cm 3 ~ 3.0 g / cm 3The A end of the self-suspension regulating pipe 2 is connected with a fluid pump, and the B end is connected with a gas. When the overall specific gravity of the cable pipe is less than the density of the drilling fluid, the filling medium in liquid state is injected into the A end of the self-suspension regulating pipe 2 until the density of the cable pipe is equal to the density of the working environment fluid; when the overall specific gravity of the cable pipe is greater than the density of the working environment fluid, the gas is introduced into the B end of the self-suspension regulating pipe 2, so that the filling medium in the self-suspension regulating pipe 2 is discharged from the A end until the specific gravity of the cable pipe is again equal to the density of the working environment fluid. According to the change of the density of the working environment fluid, the weight of the filling medium in the cable pipe can be dynamically adjusted, so that the cable pipe reaches the suspended state, and the problem that the continuous pipe is fatigued and fails due to the excessive tension in the operation process of the conventional continuous pipe is avoided.

Claims

1. A controllable self-suspending multifunctional continuous cable duct, characterized in that: It includes an inner tube (1), a self-suspending regulating tube (2), a fluid inlet tube (3), an armored cable (4), a fixing clamping mechanism (5), an outer tube (6), and a self-cooling insulation tube (7); wherein the inner tube (1) and the outer tube (6) are arranged concentrically, and the self-suspending regulating tube (2), the fluid inlet tube (3), the armored cable (4), and the self-cooling insulation tube (7) are evenly distributed in the annular gap between the inner tube (1) and the outer tube (6), and are clamped and fixed by the fixing clamping mechanism (5); The self-suspending regulating pipe (2) has a U-shaped structure and is open at both ends. A fluid pump is connected to the A end of the self-suspending regulating pipe (2), and gas is introduced into the B end of the self-suspending regulating pipe (2). The overall specific gravity of the cable is controlled by changing the mass of the filling medium in the self-suspending regulating pipe (2), so that the overall specific gravity of the cable is always equal to the density of the drilling fluid, thereby achieving a suspension state. The inner tube (1) is made of a lightweight alloy and serves as a circulation channel for another fluid. Drilling fluid flows into the well through the fluid inlet pipe (3) and flows out through the annular gap between the inner pipe (1), the outer pipe (6) and the well wall.

2. The controllable self-suspending multifunctional continuous cable duct according to claim 1, characterized in that: The self-suspending regulating tube (2) is made of a lightweight alloy and is available in two or four units.

3. The controllable self-suspending multifunctional continuous cable duct according to claim 1, characterized in that: The armored cable (4) provides the electrical energy required for the operation of terminal equipment or instruments. The armored cable (4) includes, from the inside out, a copper core (401), a shielding layer (402), an insulation layer (403), and a first armor layer (404). The copper core (401) is used to transmit electrical energy, the shielding layer (402) is used to prevent signal interference between strong and weak currents, the insulation layer (403) plays an insulating role, and the first armor layer (404) plays a protective role.

4. The controllable self-suspending multifunctional continuous cable duct according to claim 1, characterized in that: The outer tube (6) is made of a lightweight alloy.

5. The controllable self-suspending multifunctional continuous cable duct according to claim 1, characterized in that: The self-cooling heat insulation pipe (7) consists of a coolant pipe (701), a heat insulation layer (702), and a second armor layer (703) from the inside out. The self-cooling heat insulation pipe (7) is used to carry the heat generated inside the drill bit to the ground surface. The coolant pipe (701) is made of lightweight alloy material, the heat insulation layer (702) is made of aluminosilicate fiber, and the second armor layer (703) is made of lightweight alloy material.

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