CN208763630U - A kind of exploitation of gas hydrates system - Google Patents
A kind of exploitation of gas hydrates system Download PDFInfo
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- CN208763630U CN208763630U CN201821190794.2U CN201821190794U CN208763630U CN 208763630 U CN208763630 U CN 208763630U CN 201821190794 U CN201821190794 U CN 201821190794U CN 208763630 U CN208763630 U CN 208763630U
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Abstract
The utility model relates to petroleum and natural gas drilling equipment technical fields, in particular to a kind of exploitation of gas hydrates system, the exploitation of gas hydrates system includes drill ship (1), continuous pipe (2), hydraulic jet bit (3), suction anchor (4), drilling pipe (5), underwater pumping plant (6), umbilical cord (7) and collecting ship (8), drill ship (1) and collecting ship (8) are docked on sea level, one end of umbilical cord (7) is fixedly connected with the top of underwater pumping plant (6), the other end of umbilical cord (7) is fixedly connected with collecting ship (8), the bottom end of underwater pumping plant (6) is fixedly connected with one end of suction anchor (4), the other end of suction anchor (4) is connectionless for open free end, one end of drilling pipe (5) is fixedly connected with collecting ship (8), the other end and waterpower of drilling pipe (5) spray Drill bit (3) is penetrated to be fixedly connected, one end of continuous pipe (2) is fixedly connected with drill ship (1), the other end of continuous pipe (2) is fixedly connected with drill bit, and the high-efficiency mining of broken solid-state hydrate particle is able to achieve using system and method, can quickly finish multiple recovery process.
Description
Technical field
The utility model relates to petroleum and natural gas drilling equipment technical field, in particular to it is a kind of sea-bottom shallow it is non-at
The exploitation of gas hydrates system of rock stratum exploitation of gas hydrate.
Background technique
Gas hydrates are commonly called as " combustible ice ", are that the hydrocarbon gas based on methane is tied under specific temperature pressure
" cage compound " made of crystalline substance, is in ice cube shape, and " ice cube " system for tax payment alkane accounts for 80%~99.9%, can directly light, after burning almost
Any residue is not generated, it is cleaner compared to coal, petroleum, natural gas, generally believe that the carbon content of gas hydrates is suitable at present
It is a kind of current still undeveloped new energy in twice of the energy gross reserves such as coal, oil and natural gas known to the whole world.
Sea bed gas hydrate ore bed can be divided into lithotype and non-at two class of lithotype, be distributed on sea bed face and sea bed
Below face within the scope of several hundred meters, whether the mineral reserve floor after gasifying that acquires or liquefy according to decomposition of hydrate, which is able to maintain to stablize, is come area
Point, insider generally believes into lithotype hydrate and is easier to exploit, but regrettably most of current sea bottom hydrate is pine
Flexible glue makees the non-diagenesis of shape, considers there is heat injection method, voltage drop method, carbon dioxide replacement for exploiting the main method of hydrate both at home and abroad
Method, note chemical-agent technique etc., these methods such as literal meaning change hydrate environmental effect by the methods of active heating decompression
Condition makes it be decomposed into gaseous state acquisition, but develops and be so all also in the experimental stage after many years and do not find effective continuous high-efficient
Exploitation effect, not formed effective business extraction value.
For the gas hydrates on abyssal floor surface layer, some scholars propose the recovery method of " solid state fluidizing ", should
Method be hydrate is avoided to decompose in the case where not changing sea bottom hydrate ore bed temperature and pressure actively, and
Thus caused environment, geological disaster.Gas hydrates are directly broken into solid particle, by closed conduit by natural gas
The mixture of hydrate particle and seawater is pumped to sea, is then separated again, the processing such as decomposition gasification.
The prior art has the following problems:
1, for the non-gas hydrates at rock stratum of sea-bottom shallow do not find also effective continuous high-efficient mining system and
Method.
To solve the above problems, needing to invent a kind of in the non-natural gas at rock stratum exploitation of gas hydrate of sea-bottom shallow
Hydrate mining system.
Utility model content
The purpose of the utility model is to overcome the above-mentioned deficiencies in the presence of the prior art, and providing one kind can be in seabed
The non-exploitation of gas hydrates system at rock stratum exploitation of gas hydrate of shallow-layer.
In order to achieve the above object, the utility model provides following technical solution.
A kind of exploitation of gas hydrates system comprising:
Drill ship, the drill ship are docked in sea；
Collecting ship, the collecting ship are docked in sea；
Underwater pumping plant, the underwater pumping plant are fixedly connected by umbilical cord with the collecting ship；
Suction anchor, the top of the suction anchor drilling pipe are fixedly connected with the underwater pumping plant；
Drilling pipe, the top of the drilling pipe are fixedly connected with the drill ship, the middle part of the drilling pipe and the underwater pumping plant
It is fixedly connected, the drilling pipe is socketed in the suction anchor；
Hydraulic jet bit, the top of the hydraulic jet bit are fixedly connected with the bottom end of the drilling pipe, the waterpower
The other end of jet bit protrudes into non-at rock stratum；
Continuous pipe, one of the continuous pipe are fixedly connected with the drill ship, and the other end of the continuous pipe protrudes into institute
It states non-at rock stratum, the other end connection drill bit of the continuous pipe.
As a preferred embodiment of the present invention, there are two the drill bits that the other end of the continuous pipe is connected, and one is
Normal drill bit, one is the hydraulic jet bit.
As a preferred embodiment of the present invention, spray-hole is offered on the hydraulic jet bit, in the drilling pipe
The heart offers drilling pipe hole, and the spray-hole is connected to the drilling pipe hole.
As a preferred embodiment of the present invention, when the continuous pipe connects common small diameter drill bit, the continuous pipe is bored
A lesser aperture passage forms the neck eye out.
As a preferred embodiment of the present invention, when the continuous pipe connects the hydraulic jet bit, the continuous pipe
It absorbs seawater and the high pressure sea water after pressurization is ejected into continuous pipe, the hydraulic jet bit by the hydraulic jet bit
It makes rotating motion under the action of the high pressure sea water, the high pressure sea water is by the described natural of around the continuous pipe and front
Gas hydrate smashes.
Utility model works principle:
It is non-at rock stratum to sea bed face to transfer the suction anchor by the drilling pipe for the drill ship, behind sea bed face,
The undermining sea bed of the drilling pipe in high pressure pumping station pumping sea water to the suction anchor on the drill ship, and by described
Up circulating mud, suction anchor top setting can control the valve of folding to the annular space formed between suction anchor and the drilling pipe
Door, the suction anchor open the valve when boring surface layer, and the mud recycled is immediately discharged in seawater, under the effect of the pressure,
The suction anchor will gradually drill into sea bed face, until drill it is described non-at rock stratum, the drilling pipe continue creep into a small turn-off from,
The hydraulic jet bit surrounding sprays high pressure water flow, is formed about the biggish space in the hydraulic jet bit, and
After close suction anchor end valve, under the effect of the pressure, the suction anchor can be effectively fixed on sea bed face, the brill
Well ship pulls out of hole, and sails out of relatively remote again lower brill, and stand-off distance is determined according to the distribution of hydrate mineral reserve.The collecting ship is logical simultaneously
It crosses umbilical cord and connects the underwater pumping plant.
It is crept into such a way that conventional continuous pipe drilling technology beats slim-hole when the drill ship bores down again, utilizes guiding
Seat adjusts continuous drilling direction, well track is adjusted to horizontal pattern, horizontal drilling then will even by directed-drilling technique
Continuous pipe horizontal drilling completes the step of leading eye well, works to form channel for subsequent acquisition to the space.
The drill ship pulls out of hole the continuous pipe again, changes the normal drill bit, and installation includes the institute of multiple showerhead holes
Hydraulic jet bit is stated, is transferred along the neck eye path that upper step is accomplished fluently to hydrate mineral reserve layer, high-pressure injection water flow brill is then started
Into the hydraulic jet bit makes rotating motion under the action of high pressure water flow, and outside water flow is crushed hydrate mineral reserve, expands
Wellbore area, while the forward channel of drilling is hewed out, soft glue makees the broken formation under the washing away of high pressure water flow of the non-diagenesis of shape
The particle hydrate ore pulp of solid, by leading eye to flow to the space under the action of high pressure water flow.
The underwater pumping plant aspirates the hydrate ore pulp in the space, and is pumped to the collecting ship on sea level, and
It is separated again afterwards, the processing such as decomposition gasification, completes the purpose of acquisition hydrate, in the underwater pumping plant suction and high pressure water
Under the double action for flowing pumping, the powder collection of hydrate can be effectively formed, finally realizes broken solid-state hydrate
A large amount of high-efficiency minings of grain.
After the continuous tube, which moves the hydraulic jet bit, reaches the spatial position, single hydrate collection process
It completes, the wellbore after the continuous pipe described at this time starts back to drag, and re-injection silt or cement seal are exploited simultaneously.
The drill ship recycles the continuous pipe, shift position, from remaining direction of horizontal plane or different drilling depths completely
Step 6 is repeated to step 13, completes multiple directions, the hydrate acquisition of multiple seabed depths, due to hydrate mineral reserve preservation
Depth is shallower, can realize stages of mining using the process of continuous pipe drilling completely, and it is fast to lift from the top and put down the continuous pipe time, can be efficiently fast
The multiple recovery process of completion of speed.
Compared with prior art, the utility model has the beneficial effects that
1, the particle of hydrate can be effectively formed under the double action of pumping plant suction and high pressure water flow pumping under water
It collects, finally realizes a large amount of high-efficiency minings of broken solid-state hydrate particle；
2, stages of mining is realized using the process of continuous pipe drilling, it is fast to lift from the top and put down the continuous pipe time, can efficiently quickly
Complete multiple recovery process.
Detailed description of the invention
Fig. 1 is the utility model exploitation of gas hydrates system diagram；
Fig. 2 is that the utility model exploitation of gas hydrates system transfers suction anchor figure
Fig. 3 is that the exploitation of the utility model exploitation of gas hydrates system finishes closing neck eye figure；
Fig. 4, which exploits for the utility model exploitation of gas hydrates system from another location, to scheme.
Marked in the figure: 1- drill ship, 2- are continuously managed, and 3- hydraulic jet bit, 4- suction anchor, 5- drilling pipe, 6- submersible pump
It stands, 7- umbilical cord, 8- collecting ship, 9- is non-at rock stratum, 10- gas hydrates layer.
Specific embodiment
The utility model is described in further detail below with reference to embodiment and specific embodiment, but should not be by this
The range for being interpreted as the utility model aforementioned body is only limitted to embodiment below, all to be realized based on the content of the present invention
Technology belongs to the protection scope of the utility model.
Embodiment 1
As shown in Figure 1, the utility model include drill ship 1, continuous pipe 2, hydraulic jet bit 3, suction anchor 4, drilling pipe 5,
Underwater pumping plant 6, umbilical cord 7 and collecting ship 8, drill ship 1 and collecting ship 8 are docked on sea level, one end of umbilical cord 7 and underwater pumping plant
6 top is fixedly connected, and the other end of umbilical cord 7 is fixedly connected with collecting ship 8, the bottom end of underwater pumping plant 6 and one end of suction anchor 4
It being fixedly connected, the connectionless free end for opening of the other end of suction anchor 4, one end of drilling pipe 5 is fixedly connected with collecting ship 8,
The other end of drilling pipe 5 is fixedly connected with hydraulic jet bit 3, and one end of continuous pipe 2 is fixedly connected with drill ship 1, continuous pipe 2
The other end is fixedly connected with drill bit, different in the drill bit that the other end of the different continuous pipes 2 of working stage connects, and is getting through wellbore
Working stage connect normal drill bit, exploitation working stage connect hydraulic jet bit 3, in the present embodiment drilling pipe 5 use
Be drilling rod, drilling pipe 5 can be using other drilling tubulars such as continuous pipe in other embodiments.
In recovery process, the hydraulic jet bit of continuous pipe connection makes rotating motion under high pressure sea water effect, high pressure
Seawater smashes the gas hydrates around continuous pipe, the gas hydrates being crashed to pieces along neck eye channel inflow space,
Underwater pumping plant pumps the gas hydrates fragment in space and is transported to collecting ship by umbilical cord.
It creeps into such a way that conventional continuous pipe drilling technology beats ommatidium when drill ship bores down again, is adjusted using guide holder
Continuous drilling direction, high-ranking military officer's eye track are adjusted to horizontal pattern and carry out horizontal drilling, then will be continuous by directed-drilling technique
Pipe horizontal drilling forms channel to the space for subsequent gas hydrates fragment collecting work.
Claims (5)
1. a kind of exploitation of gas hydrates system, characterized by comprising:
Drill ship, the drill ship are docked in sea；
Collecting ship, the collecting ship are docked in sea；
Underwater pumping plant, the underwater pumping plant are fixedly connected by umbilical cord with the collecting ship；
Suction anchor, the top of the suction anchor drilling pipe are fixedly connected with the underwater pumping plant；
Drilling pipe, the top of the drilling pipe are fixedly connected with the drill ship, and the middle part of the drilling pipe is fixed with the underwater pumping plant
Connection, the drilling pipe are socketed in the suction anchor；
Hydraulic jet bit, the top of the hydraulic jet bit are fixedly connected with the bottom end of the drilling pipe, the water-jet
The other end of drill bit protrudes into non-at rock stratum；
Continuous pipe, one of the continuous pipe are fixedly connected with the drill ship, and the other end of the continuous pipe protrudes into described non-
At rock stratum, the other end of the continuous pipe connects drill bit.
2. a kind of exploitation of gas hydrates system according to claim 1, it is characterised in that: the continuous pipe it is another
It holds there are two connected drill bits, one is normal drill bit, and one is the hydraulic jet bit.
3. a kind of exploitation of gas hydrates system according to claim 1, it is characterised in that: the hydraulic jet bit
On offer spray-hole, the center of the drilling pipe offers drilling pipe hole, and the spray-hole is connected to the drilling pipe hole.
4. a kind of exploitation of gas hydrates system according to claim 2, it is characterised in that: the continuous pipe connects institute
When stating normal drill bit, the continuous pipe drills out an aperture passage and forms neck eye.
5. a kind of exploitation of gas hydrates system according to claim 1, it is characterised in that: the continuous pipe connects institute
When stating hydraulic jet bit, the continuous pipe absorbs seawater and sprays the high pressure sea water after pressurization by the hydraulic jet bit
Continuous pipe is projected, the hydraulic jet bit makes rotating motion under the action of the high pressure sea water, and the high pressure sea water is by institute
The gas hydrates for stating around continuous pipe and front smash.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821190794.2U CN208763630U (en) | 2018-07-26 | 2018-07-26 | A kind of exploitation of gas hydrates system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821190794.2U CN208763630U (en) | 2018-07-26 | 2018-07-26 | A kind of exploitation of gas hydrates system |
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| CN208763630U true CN208763630U (en) | 2019-04-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798608A (en) * | 2018-07-26 | 2018-11-13 | 四川宏华石油设备有限公司 | A kind of exploitation of gas hydrates system and method |
| CN111980710A (en) * | 2020-08-13 | 2020-11-24 | 常州大学 | Recyclable and continuous natural gas hydrate exploitation device with desulfurization system and exploitation method |
| CN114320274A (en) * | 2021-12-31 | 2022-04-12 | 中国海洋石油集团有限公司 | Offshore oil field shallow gas prediction and pre-drilling scheme design method |
-
2018
- 2018-07-26 CN CN201821190794.2U patent/CN208763630U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798608A (en) * | 2018-07-26 | 2018-11-13 | 四川宏华石油设备有限公司 | A kind of exploitation of gas hydrates system and method |
| CN108798608B (en) * | 2018-07-26 | 2023-12-01 | 四川宏华石油设备有限公司 | Natural gas hydrate exploitation system and method |
| CN111980710A (en) * | 2020-08-13 | 2020-11-24 | 常州大学 | Recyclable and continuous natural gas hydrate exploitation device with desulfurization system and exploitation method |
| CN114320274A (en) * | 2021-12-31 | 2022-04-12 | 中国海洋石油集团有限公司 | Offshore oil field shallow gas prediction and pre-drilling scheme design method |
| CN114320274B (en) * | 2021-12-31 | 2023-08-11 | 中国海洋石油集团有限公司 | Offshore oilfield shallow gas prediction and pre-drilling scheme design method |
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