CN115182705B - Submarine cold spring exploitation device and method - Google Patents
Submarine cold spring exploitation device and method Download PDFInfo
- Publication number
- CN115182705B CN115182705B CN202210902487.7A CN202210902487A CN115182705B CN 115182705 B CN115182705 B CN 115182705B CN 202210902487 A CN202210902487 A CN 202210902487A CN 115182705 B CN115182705 B CN 115182705B
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- gas
- gas collecting
- cold spring
- booster pump
- flow channel
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 239000003112 inhibitor Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 49
- 239000000203 mixture Substances 0.000 claims description 29
- 238000002347 injection Methods 0.000 claims description 24
- 239000007924 injection Substances 0.000 claims description 24
- 239000006260 foam Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 8
- 238000005065 mining Methods 0.000 claims description 5
- 239000000284 extract Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 91
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 10
- 239000000945 filler Substances 0.000 description 5
- 239000003345 natural gas Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000006265 aqueous foam Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007528 sand casting Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/40—Separation associated with re-injection of separated materials
Abstract
The invention discloses a submarine cold spring exploitation device, which aims to continuously collect submarine cold springs; the technical scheme of the submarine cold spring exploitation method is as follows: the utility model provides a seabed cold spring exploitation device, is used for gathering seabed cold spring's gas collecting channel, annotates agent mixing arrangement, centrifugal separator and booster pump including setting up in seabed department, the gas collecting channel of being connected with peripheral hardware gas production platform, the input of booster pump passes through pipe cable and gas collecting channel intercommunication, the output and the entrance linkage of centrifugal separator of booster pump, centrifugal separator's gas outlet is connected with annotating agent mixing arrangement, annotate the delivery outlet of agent mixing arrangement and be connected with the lower extreme of gas collecting channel, annotate and be equipped with on the agent mixing arrangement and be used for annotating the notes agent pipe of bubble row agent and hydrate inhibitor, belong to seabed cold spring exploitation technical field.
Description
Technical Field
The invention belongs to the technical field of submarine cold spring exploitation, and particularly relates to a submarine cold spring exploitation device and a submarine cold spring exploitation method.
Background
The on-site measurement of the submarine cold spring, namely the submarine natural gas leakage, is a technical hotspot of the current ocean science aiming at the submarine cold spring activity, and the study of the cold spring activity improves the understanding and utilization of deep sea resources by people; at present, the submarine cold spring bubble plume is mainly used as a main clue and thought for searching oil and gas resources, in particular for exploring and identifying natural gas hydrate.
CN105927194B discloses a device and a method for collecting leaked natural gas in a cold spring area on the sea floor, the device comprises a gas collecting chamber, a buoyancy device and a gas storage tank, the gas collecting chamber, the collecting chamber and the buoyancy device are coaxially connected from bottom to top sequentially through a guiding buoy chain, the buoyancy device is communicated with the gas storage tank, and the collecting chamber ascends or descends along the guiding buoy chain and is connected or disconnected with the gas collecting chamber and the buoyancy device.
The collecting device utilizes the collecting chamber to transfer the collected natural gas, and the collecting chamber moves back and forth, so that the natural gas cannot be continuously collected; and the collection chamber can only be arrested and collect natural gas, so that the collection rate of the submarine cold spring is difficult to control.
Disclosure of Invention
The invention mainly aims to provide a submarine cold spring exploitation device which aims to continuously collect submarine cold springs; a submarine cold spring exploitation method is also provided.
According to a first aspect of the invention, there is provided a submarine cold spring exploitation device, comprising a gas collecting hood arranged at the seabed for collecting submarine cold springs, a gas collecting rod connected with an external gas collecting platform, a filling agent mixing device, a centrifugal separator and a booster pump, wherein the input end of the booster pump is communicated with the gas collecting hood through a pipe cable, the output end of the booster pump is connected with the inlet of the centrifugal separator, the gas outlet of the centrifugal separator is connected with a filling agent mixing device, the output port of the filling agent mixing device is connected with the lower end of the gas collecting rod, and a filling agent pipe for filling foam discharging agent and hydrate inhibitor is arranged on the filling agent mixing device.
In the submarine cold spring exploitation device, the gas collecting hood encloses a gas collecting space, the top of the gas collecting hood is provided with the gas outlet communicated with the gas collecting space, and the side wall of the gas collecting hood is internally provided with the reflux channel;
the pipe cable is including the cover inner tube and the outer tube of establishing together, the upper end of inner tube with the input of booster pump is connected, the lower extreme and the venthole intercommunication of inner tube, the upper end of outer tube is connected with the output of booster pump, the lower extreme and the backward flow passageway intercommunication of outer tube, the gas-liquid stream that the backward flow passageway output can be in the gas collecting space along the direction slope upward blowout that is close to the venthole.
In the submarine cold spring exploitation device, the gas collecting hood is conical, the backflow channel is sequentially divided into a first flow channel, a second flow channel, a third flow channel and a fourth flow channel from top to bottom, the first flow channel vertically extends downwards, the second flow channel obliquely extends downwards along the side wall of the gas collecting hood, the third flow channel horizontally extends, and the fourth flow channel obliquely extends upwards along the direction close to the gas collecting space.
In the submarine cold spring exploitation device, the cross-sectional area of the fourth runner is smaller than that of the third runner.
In the submarine cold spring exploitation device, the support frame is arranged below the gas collecting hood, the support frame is fixed on the submarine mud surface, and the gas collecting hood is fixed on the support frame.
In the submarine cold spring exploitation device, the plurality of gas collecting hoods and the plurality of pipe cables are arranged, and the gas collecting hoods and the pipe cables are in one-to-one correspondence.
According to a second aspect of the present invention there is also provided a method of seafloor cold spring production involving a seafloor cold spring production apparatus as described in the first aspect, further comprising the steps of:
step 1: starting a booster pump, wherein the gas collecting hood extracts a gas-liquid mixture with a submarine cold spring, and the booster pump conveys the gas-liquid mixture to the centrifugal separator;
step 2: the centrifugal separator separates the gas-liquid mixture, discharges most of liquid, and conveys the gas-liquid mixture containing a small part of liquid to the injection mixing device;
step 3: the foam discharging agent and the hydrate inhibitor are injected into the injection mixing device through the injection pipe, and fully contact with the gas-liquid mixture, so that water-containing foam is formed, and the water-containing foam is conveyed to an external gas production platform through the gas collecting rod.
The technical scheme of the invention has at least one of the following advantages or beneficial effects:
according to the invention, the gas collecting hood is arranged at the seabed, the gas-liquid mixture containing the seabed cold spring is extracted through the booster pump and the pipe cable, and is sequentially processed by the centrifugal separator and the injection mixing device, most of liquid is removed to form water-containing foam, the water-containing foam is then conveyed into the gas collecting rod, and the gas collecting rod is provided for the external gas collecting platform, so that the seabed cold spring can be continuously collected, and the collection efficiency is improved;
simultaneously, the pipe cable includes inner tube and outer tube, and the inner tube is used for extracting gas-liquid mixture, and the outer tube is the partial gas-liquid mixture of backward flow, makes the gas collecting space of gas collecting channel form negative pressure, induces more seabed cold spring to collect in the gas collecting space.
According to the method for collecting and collecting the submarine cold spring plume bubbles, provided by the invention, the jet negative pressure gas collecting hood is used for collecting and collecting the submarine plume bubbles, and meanwhile, the collecting and collecting requirements of a plurality of dispersed plumes on the seabed are met, so that an effective technological method is provided for collecting and collecting the submarine plume bubbles.
Drawings
The invention is further described below with reference to the drawings and examples;
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a top view of a gas hood according to embodiment 1 of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2 of example 1 of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention.
The following disclosure provides many different embodiments, or examples, for implementing different aspects of the invention.
Example 1
Referring to fig. 1 to 3, in one embodiment of the present invention, a submarine cold spring exploitation device includes a gas collecting hood 1 disposed at the seabed for collecting a submarine cold spring, a gas collecting rod 2 connected to an external gas collecting platform, an injection mixing device 3, a centrifugal separator 4, and a booster pump 5, wherein an input end of the booster pump 5 is communicated with the gas collecting hood 1 through a pipe cable 6, an output end of the booster pump 5 is connected with an inlet of the centrifugal separator 4, an air outlet of the centrifugal separator 4 is connected with the injection mixing device 3, an output port of the injection mixing device 3 is connected with a lower end of the gas collecting rod 2, and an injection pipe 7 for injecting a foam discharging agent and a hydrate inhibitor is disposed on the injection mixing device 3.
When the device is used, the gas collecting hood 1 is arranged on the sea floor according to the position of a cold spring plume, the seabed cold spring is collected under the gas collecting hood 1, under the action of the booster pump 5, the gas-liquid mixture containing the seabed cold spring is conveyed into the centrifugal separator 4 through the pipe cable 6, the gas-liquid mixture is subjected to gas-liquid separation under the action of the centrifugal separator 4, most of liquid is discharged into the sea through the liquid outlet of the centrifugal separator 4, the gas-liquid mixture containing a small part of liquid is conveyed to the injection agent mixing device 3 through the gas outlet of the centrifugal separator 4, the injection agent pipe 7 injects the bubble discharging agent and the hydrate inhibitor into the injection agent mixing device 3, the bubble discharging agent and the hydrate inhibitor are fully contacted with the gas-liquid mixture, so that water-containing foam is formed, the density of the gas-liquid mixture is reduced, the small part of liquid in the gas-liquid mixture can be discharged from the gas collecting rod 2 along with gas, the gas collecting rod 2 is connected with an external gas collecting platform, and the water-containing foam is supplied to the external gas collecting platform, so that the seabed cold spring can be continuously collected;
the external gas production platform can adopt a defoaming agent to carry out gas-water separation on the water-containing foam so as to collect gas; of course, in actual setting, the drill rod can be adopted to serve as the gas collecting rod 2, and the peripheral gas production platform can be replaced by a peripheral gas production ship, and power cables of the centrifugal separator 4 and the booster pump 5 are led out from the peripheral gas production platform or the peripheral gas production ship.
And, when practical application, there are a plurality of seabed cold spring output points near same sea area, can set up a plurality of gas-collecting channel 1 and pipe cable 6, and pipe cable 6 and gas-collecting channel 1 one-to-one, pipe cable 6 can be connected with booster pump 5 respectively, can gather a plurality of seabed cold springs simultaneously.
Specifically, the gas collecting hood 1 encloses a gas collecting space, the gas collecting hood 1 is covered above a cold spring plume on the sea floor, the plume bubbles are collected in the gas collecting space, the top of the gas collecting hood 1 is provided with a gas outlet hole 11 communicated with the gas collecting space, and the side wall of the gas collecting hood 1 is internally provided with a backflow channel 12;
the pipe cable 6 comprises an inner pipe 61 and an outer pipe 62 which are sleeved together, the upper end of the inner pipe 61 is connected with the input end of the booster pump 5, the lower end of the inner pipe 61 is communicated with the air outlet 11, the upper end of the outer pipe 62 is connected with the output end of the booster pump 5, and the lower end of the outer pipe 62 is communicated with the return channel 12;
the booster pump 5 is operated, the inner tube 61 can extract the gas-liquid mixture in the gas collecting space through the gas outlet hole 11, the output end of the booster pump 5 is provided with two branches, one branch is connected with the centrifugal separator 4 and is used for conveying part of the gas-liquid mixture to the centrifugal separator 4, the other branch is connected with the outer tube 62, part of the gas-liquid mixture flows back into the backflow channel 12 through the outer tube 62, the gas-liquid output by the backflow channel 12 can be sprayed upwards in the gas collecting space along the direction close to the gas outlet hole 11 in an inclined manner, so that negative pressure is generated in the gas collecting space, more plume bubbles are induced to be collected in the gas collecting space, and the content of gas is improved.
Preferably, the gas collecting hood 1 is tapered, the return channel 12 is divided into a first flow channel 121, a second flow channel 122, a third flow channel 123 and a fourth flow channel 124 from top to bottom in sequence, the first flow channel 121 extends vertically downwards, the second flow channel 122 extends obliquely downwards along the side wall of the gas collecting hood 1, the third flow channel 123 extends horizontally, the fourth flow channel 124 extends obliquely upwards along the direction close to the gas collecting space, the gas-liquid fluid is sprayed after passing through the first flow channel 121, the second flow channel 122, the third flow channel 123 and the fourth flow channel 124 in sequence, and because the fourth flow channel 124 is obliquely upwards, the sprayed gas-liquid fluid is in the same direction, so that an upward impact force is generated, and the lower part of the gas collecting hood 1 forms negative pressure.
Preferably, the cross-sectional area of the fourth flow passage 124 is smaller than the cross-sectional area of the third flow passage 123, and when the gas-liquid fluid enters the fourth flow passage 124, the flow rate and pressure are both increased, so that the injection speed is also increased, and the negative pressure effect is improved.
In a specific embodiment, the number of the backflow channels 12 can be multiple, and the backflow channels are circumferentially and uniformly distributed in the side wall of the gas collecting hood 1 around the axis of the gas collecting hood 1; because the return channel 12 is relatively complex, in actual processing, processes such as paraffin casting, sand casting, and the like can be used.
In order to enable the plume bubbles to have more space, a supporting frame 8 is arranged below the gas collecting hood 1, the supporting frame 8 is fixed on the seabed mud surface, the gas collecting hood 1 is fixed on the supporting frame 8, and the gas collecting hood 1 can be lifted, but the plume bubbles cannot be blocked from entering the gas collecting space.
Example 2
A method for exploiting a cold spring on the sea floor, which relates to the device for exploiting a cold spring on the sea floor according to the embodiment 1, wherein a corresponding gas collecting hood 1 is arranged according to the position of a cold spring plume on the mud surface of the sea floor, and a pipe cable 6 is connected, and the method further comprises the following steps:
step 1: starting the booster pump 5, and extracting the gas-liquid mixture with the seabed cold spring by the gas-collecting hood 1, wherein under the action of the booster pump 5, the inner pipe 61 can extract the gas-liquid mixture in the gas-collecting space of the gas-collecting hood 1;
the output end of the booster pump 5 is provided with two branches, one branch is connected with the centrifugal separator 4 to convey part of gas-liquid mixture to the centrifugal separator 4, the other branch is connected with the outer pipe 62, part of gas-liquid mixture flows back into the backflow channel 12 through the outer pipe 62, and gas-liquid flow output by the backflow channel 12 can be sprayed upwards in the gas collecting space in an inclined way along the direction close to the gas outlet hole 11, so that negative pressure is generated in the gas collecting space, and more plume bubbles are induced to be collected in the gas collecting space;
step 2: the centrifugal separator 4 separates the gas-liquid mixture, most of the liquid is discharged into the sea through the liquid outlet of the centrifugal separator 4, and the gas-liquid mixture containing a small part of the liquid is conveyed to the injection mixing device 3 through the gas outlet of the centrifugal separator 4;
step 3: the foam discharging agent and the hydrate inhibitor are injected into the injection mixing device 3 through the injection pipe 7 and fully contacted with the gas-liquid mixture, so that aqueous foam is formed, and the aqueous foam is conveyed to an external gas production platform through the gas collecting rod 2.
By the mining method, the submarine cold springs can be continuously collected, and the mining efficiency is improved.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. The submarine cold spring exploitation device is characterized by comprising a gas collecting hood, a gas collecting rod, an injection mixing device, a centrifugal separator and a booster pump, wherein the gas collecting hood is arranged at the seabed and used for collecting a submarine cold spring, the gas collecting rod is connected with an external gas collecting platform, the input end of the booster pump is communicated with the gas collecting hood through a pipe cable, the output end of the booster pump is connected with the inlet of the centrifugal separator, the gas outlet of the centrifugal separator is connected with the injection mixing device, the output port of the injection mixing device is connected with the lower end of the gas collecting rod, and an injection pipe used for injecting foam discharging agent and hydrate inhibitor is arranged on the injection mixing device;
the gas collecting cover encloses a gas collecting space, the top of the gas collecting cover is provided with a gas outlet communicated with the gas collecting space, and the side wall of the gas collecting cover is internally provided with a reflux channel;
the pipe cable comprises an inner pipe and an outer pipe which are sleeved together, the upper end of the inner pipe is connected with the input end of the booster pump, the lower end of the inner pipe is communicated with the air outlet, the upper end of the outer pipe is connected with the output end of the booster pump, the lower end of the outer pipe is communicated with the backflow channel, and gas-liquid fluid output by the backflow channel can be sprayed upwards in the gas collecting space in an inclined way along the direction close to the air outlet;
the gas-collecting hood is characterized in that a support frame is arranged below the gas-collecting hood, the support frame is fixed on the seabed mud surface, and the gas-collecting hood is fixed on the support frame.
2. The subsea cold spring production device of claim 1, wherein the gas collection cover is tapered, the return channel is divided into a first flow channel, a second flow channel, a third flow channel and a fourth flow channel from top to bottom in sequence, the first flow channel extends vertically downwards, the second flow channel extends obliquely downwards along the side wall of the gas collection cover, the third flow channel extends horizontally, and the fourth flow channel extends obliquely upwards in a direction close to the gas collection space.
3. The subsea cold spring production device of claim 2, characterized in that the cross-sectional area of the fourth flow channel is smaller than the cross-sectional area of the third flow channel.
4. The submarine cold spring mining device according to claim 1, wherein the plurality of gas collecting hoods and the plurality of pipe cables are arranged in a one-to-one correspondence.
5. A method of seafloor cold spring mining, characterized in that it relates to a device for seafloor cold spring mining according to any one of claims 1-4, further comprising the steps of:
step 1: starting a booster pump, wherein the gas collecting hood extracts a gas-liquid mixture with a submarine cold spring, and the booster pump conveys the gas-liquid mixture to the centrifugal separator;
step 2: the centrifugal separator separates the gas-liquid mixture, discharges most of liquid, and conveys the gas-liquid mixture containing a small part of liquid to the injection mixing device;
step 3: the foam discharging agent and the hydrate inhibitor are injected into the injection mixing device through the injection pipe, and fully contact with the gas-liquid mixture, so that water-containing foam is formed, and the water-containing foam is conveyed to an external gas production platform through the gas collecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210902487.7A CN115182705B (en) | 2022-07-27 | 2022-07-27 | Submarine cold spring exploitation device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210902487.7A CN115182705B (en) | 2022-07-27 | 2022-07-27 | Submarine cold spring exploitation device and method |
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| Publication Number | Publication Date |
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| CN115182705A CN115182705A (en) | 2022-10-14 |
| CN115182705B true CN115182705B (en) | 2024-03-22 |
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| CN202210902487.7A Active CN115182705B (en) | 2022-07-27 | 2022-07-27 | Submarine cold spring exploitation device and method |
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| CN115182705A (en) | 2022-10-14 |
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