CN211924143U

CN211924143U - Membrane type heating bypass sieve tube

Info

Publication number: CN211924143U
Application number: CN202020498693.2U
Authority: CN
Inventors: 秦绪文; 邱海峻; 寇贝贝; 史浩贤; 卢秋平; 黄芳飞; 李晶; 李彬; 申凯翔; 曾静; 黎晓舟
Original assignee: Guangzhou Marine Geological Survey
Current assignee: Guangzhou Marine Geological Survey
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2020-11-13
Anticipated expiration: 2030-04-08

Abstract

The utility model relates to the technical field of natural gas exploitation auxiliary devices, in particular to a membrane type heating bypass sieve tube, which adopts membrane type heating and is placed in a sieve tube which is closer to a reservoir, so that the sieve tube is not only closer to a secondary hydrate forming area, but also can effectively transfer heat generated by a membrane to the reservoir, and has good heating effect; the double-shoulder-type heat exchanger comprises a plurality of sieve pipes, bypass pipes are uniformly arranged at every 90 degrees in the circumferential direction of each group of sieve pipes, the outer wall of each group of bypass pipes is uniformly wrapped with membrane type heating units, four groups of membrane type heating units are in a parallel state, the two ends of each group of sieve pipes are respectively a male end and a female end, the male ends and the female ends of two adjacent groups of sieve pipes are in threaded connection, the threaded connection part of the male end and the female end of each group of sieve pipes is in a double-shoulder structure, the inner side of the male end is provided with a zero line joint or a fire line joint of each membrane type heating unit, the outer side of the male end is provided with a fire line joint.

Description

Membrane type heating bypass sieve tube

Technical Field

The utility model relates to a natural gas exploitation auxiliary device's technical field especially relates to a membrane heating bypass screen pipe.

Background

As is well known, natural gas hydrate is a new mineral species, and has attracted attention because of its large resource storage and environmental friendliness. Especially, in recent years, the exploration scale of the natural gas hydrate is gradually enlarged, and the exploitation research is gradually improved. China, America, Japan and the like have intensively carried out technical attack and trial production on the exploitation of the natural gas hydrate in the sea area.

In the decomposition process of the natural gas hydrate, a phase equilibrium point can move due to the reduction of the environmental temperature caused by the heat absorption of the decomposition of the hydrate, and when the temperature is reduced to the side where the phase equilibrium is beneficial to the generation of the natural gas hydrate, a secondary hydrate can be formed. At present, the solution means after the secondary hydrate is generated is less, a chemical agent is injected to inhibit the generation of the secondary hydrate, a heating device is actively added in a decompression decomposition path, for example, a resistance heating mode such as a heating cable is adopted, the secondary hydrate is decomposed by heating the ambient temperature, but the heating effect of the mode in practical application is not ideal, the heat is always consumed completely when the heat is not transmitted to a secondary hydrate generation area, and the effect of heating the secondary hydrate generation area cannot be achieved. In addition, heating modes such as microwave heating and hot water injection are adopted, so that the heating effect on the stratum is not ideal under the condition of consuming a large amount of resources, most heat is dissipated in a shaft and cannot be conducted to a non-target area, and the heat utilization rate is low.

SUMMERY OF THE UTILITY MODEL

For solving above-mentioned technical problem, the utility model provides a membrane formula heating bypass screen pipe adopts the diaphragm type heating, places in the screen pipe that is closer apart from the reservoir bed, and not only it is closer apart from secondary hydrate formation district, and the heat after the diaphragm generates heat simultaneously can effectively transmit to the reservoir bed, and heating effect is good, makes secondary hydrate decompose, solves the stifled problem of ice, improves the reservoir permeability, prolongs the steady output ability of exploitation of moisture gas well.

The utility model discloses a membrane formula heating bypass screen pipe comprises a plurality of screen pipes, every group every 90 evenly are provided with the bypass pipe in the screen pipe interior circumferencial direction, every group the bypass pipe outer wall evenly wraps up the diaphragm type unit that generates heat, and four group's diaphragm type units that generate heat are in parallel state, every group the screen pipe both ends are public end and female end respectively, and are adjacent two sets of the public end of screen pipe adopts threaded connection, every group the threaded connection department of the public end of screen pipe and female end all adopts two platform shoulder structures, and public end inboard is provided with the zero line joint or the live wire joint of the diaphragm type unit that generates heat, and the public end outside is provided with the live wire joint or the zero line joint of the diaphragm type unit that generates heat, and the female end inboard is provided with the live wire joint or the zero line joint of the diaphragm type unit that.

Preferably, each group of screen pipe inside wall all is provided with the base pipe.

Preferably, the film type heating unit material is an electric heating film, a resistance wire and other bendable heating materials, components and the like.

Preferably, the shape of the end surface of the bypass pipe can be flat circular arc, round, diamond, square and the like.

Preferably, the screens can be prepacked screens, metal cotton screens, 3DHP screens, foam metal cotton screens, wire-wrapped screens, star-meshed screens, and the like.

Compared with the prior art, the beneficial effects of the utility model are that: the integrated membrane type electric heating technology and the bypass sieve tube technology in the device form a membrane type heating bypass sieve tube through technical innovation, the membrane type heating unit is high in heat efficiency conversion efficiency, therefore, the electric heating membrane is relatively low in power consumption, heat can be diffused to a secondary hydrate generation area in a heat radiation mode, a ground power supply is communicated with the electric heating membrane through a lead in the built-in sieve tube, electric energy is converted into heat energy, the electric heating membrane is a pure resistance circuit, the conversion efficiency is high, except for a small part of loss (2%), most of heat (98%) is converted into heat energy, the power supply burden is reduced, meanwhile, the ground power supply can work in liquid without being influenced by liquid in a well, and on the premise that the sand blocking effect of the sieve tube is not reduced, the risk that long-horizontal-section gravel is filled and bridged in advance and.

Drawings

FIG. 1 is a schematic view of a single screen according to the present invention;

fig. 2 is a left side view of the present invention;

FIG. 3 is a partial schematic view of a screen, base pipe, bypass pipe, and diaphragm heat generating unit;

in the drawings, the reference numbers: 1. a screen pipe; 2. a film type heating unit; 3. a live wire connection; 4. a zero line terminal; 5. a male end; 6. a female end; 7. a bypass pipe; 8. a base pipe.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1 to 3, the membrane heating bypass sieve tube of the present invention comprises a plurality of sieve tubes 1, each sieve tube 1 can be a pre-filled sieve tube, a metal cotton sieve tube, a 3DHP sieve tube, a foam metal cotton sieve tube, a wire-wrapped sieve tube, a star-hole sieve tube, etc., the inner side wall of each group of sieve tubes 1 is provided with a base tube 8, the base tube 8 improves the overall strength of the sieve tube 1, each group of sieve tubes 1 is uniformly provided with a bypass tube 7 at every 90 ° of the inner circumferential direction, the end surface shape of the bypass tube 7 can be flat arc, circular, diamond, square, etc., the outer wall of each group of bypass tubes 7 is uniformly wrapped with a membrane heating unit 2, the membrane heating unit 2 is made of an electrothermal film, a resistance wire and other bendable heating materials, components, etc., the four groups of membrane heating units 2 are in parallel connection, the two ends of each group of sieve tubes 1 are respectively, the threaded connection part of the male end 5 and the female end 6 of each group of sieve pipes 1 adopts a double-shoulder structure, the inner side of the male end 5 is provided with a zero line joint 4 or a fire line joint 3 of a membrane type heating unit 2, the outer side of the male end 5 is provided with a fire line joint 3 or a fire line joint 3 of the membrane type heating unit 2, the outer side of the female end 6 is provided with a zero line joint 4 or a fire line joint 3 of the membrane type heating unit 2, the inner side of the female end 6 is provided with a fire line joint 3 or a zero line joint 4 of the membrane type heating unit 2, the sieve pipes 1 can be combined and connected as required, when in connection, the female end 6 of the sieve pipe 1 is connected with the male end 5 of the adjacent sieve pipe 1, the male end 5 and the female end 6 are connected by threads, after the sieve pipe 1 is connected, the fire line, the zero line and the zero line are directly connected with the zero line, a circuit is ensured, the extreme sieve, the ground support system is matched, after being electrified, the near well zone is heated and is close to the reservoir, the heat conduction mode is thermal convection, the decomposition of the secondary hydrate can be effectively promoted, the permeability of the reservoir can be recovered, and the problems can be effectively solved.

The utility model discloses a membrane type heating bypass screen pipe, it is at the during operation, base pipe 8 improves 1 bulk strength of screen pipe, screen pipe 1 can carry out built-up connection as required, during the connection, 1 female end 6 of screen pipe is connected with 1 public end 5 of adjacent screen pipe, public end 5 uses the screw thread with female end 6 to be connected, screen pipe 1 is connected the back and is guaranteed the live wire to the live wire, zero wire to the zero line, 1 live wire and zero line lug connection of terminal screen pipe, guarantee the return circuit, 2 parcel of membrane type heating element are on

other siphunculus

7, 7 pre-puts in the sand control structure of screen pipe 1 of bypass pipe, supporting ground support system, to near well area heating after the circular telegram, be close to the reservoir, heat conduction mode is the thermal convection, can effectively make secondary hydrate's decomposition, resume the reservoir permeability, the above-mentioned.

The utility model discloses a membrane formula heating bypass screen pipe, above the mounting means of all parts, connected mode or the mode that sets up are the welding, riveting or other common mechanical means, wherein can slide/rotate fixedly promptly for slide/not dropping under the rotation state, seal the intercommunication and seal when two connecting pieces communicate promptly, and the concrete structure of its all parts, model and coefficient index are its from the area technique, as long as can reach all implementation of its beneficial effect, above-mentioned all with the electric module and be the common electrical part in market with electrical apparatus, buy when returning to the use only need connect according to the mutual electricity of the instruction manual of buying back together and can use, and control module is its common from taking the module, the event is all no longer repeated here.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The membrane type heating bypass sieve tube is characterized by comprising a plurality of sieve tubes (1), wherein each group of sieve tubes (1) is uniformly provided with a bypass tube (7) at every 90 degrees in the inner circumference direction, the outer wall of each group of bypass tubes (7) is uniformly wrapped with a membrane type heating unit (2), four groups of membrane type heating units (2) are in a parallel state, two ends of each group of sieve tubes (1) are respectively provided with a male end (5) and a female end (6), the male ends (5) and the female ends (6) of two adjacent groups of sieve tubes (1) are in threaded connection, the threaded connection part of the male end (5) and the female end (6) of each group of sieve tubes (1) adopts a double-shoulder structure, the inner side of the male end (5) is provided with a zero line joint (4) or a live line joint (3) of the membrane type heating unit (2), the outer side of the male end (5) is provided with a live line joint (3), the outer side of the female end (6) is provided with a zero line joint (4) or a live line joint (3) of the film type heating unit (2), and the inner side of the female end (6) is provided with a live line joint (3) or a zero line joint (4) of the film type heating unit (2).

2. The membrane-heated bypass screen according to claim 1, wherein each set of screens (1) is provided with a base pipe (8) on its inner side wall.

3. The membrane heating bypass screen pipe as claimed in claim 2, wherein the membrane heating unit (2) is made of electric heating film, resistance wire and other bendable heating materials, components and parts.

4. The membrane-heated bypass screen according to claim 3, wherein the shape of the end face of the bypass pipe (7) is selected from the group consisting of flat circular arc, circle, diamond, square, etc.

5. The membrane-heated bypass screen according to claim 4, wherein the screen (1) is selected from the group consisting of a pre-filled screen, a metal-cotton screen, a 3DHP screen, a foam metal-cotton screen, a wire-wrapped screen, a star-meshed screen, and the like.