CN102182414A - Deep-sea sediment core pressure-maintaining device matched with submarine drilling rig and method for using deep-sea sediment core pressure-maintaining device - Google Patents
Deep-sea sediment core pressure-maintaining device matched with submarine drilling rig and method for using deep-sea sediment core pressure-maintaining device Download PDFInfo
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- CN102182414A CN102182414A CN2011100560300A CN201110056030A CN102182414A CN 102182414 A CN102182414 A CN 102182414A CN 2011100560300 A CN2011100560300 A CN 2011100560300A CN 201110056030 A CN201110056030 A CN 201110056030A CN 102182414 A CN102182414 A CN 102182414A
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Abstract
The invention discloses a deep-sea sediment core pressure-maintaining device matched with a submarine drilling rig and a method for using the deep-sea sediment core pressure-maintaining device. The deep-sea sediment core pressure-maintaining device comprises an upper seal cover, a metal hollow drilling rod, a sampling tube and a lower seal cover, wherein the sampling tube is arranged in the metal hollow drilling rod; the metal hollow drilling rod is connected with the upper seal cover and the lower seal cover by fine threads; the upper seal cover and the lower seal cover respectively comprise an inflation valve, a top cover, a pressure shell, an expandable air cushion and O rings; the top cover and the expandable air cushion are arranged in the pressure shell; the O rings are arranged between the pressure shell and the top cover and between the pressure shell and the expandable air cushion; and the inflation valve is arranged on the top cover. The deep-sea sediment core pressure-maintaining device is matched with the submarine drilling rig, can maintain in-situ pressure in the process of extracting deep-sea sediments from a sea bed to a sea surface, and can guarantee non-loss of hydrocarbon gas such as methane gas and non-melting of a hydrate. The invention is applied to drilling and coring ocean sediments by using the submarine drilling rig and can be widely applied to exploration of ocean resources such as the hydrate and deep-sea oil and gas resources.
Description
Technical field
The present invention relates to a kind of and supporting halmeic deposit rock core pressurizer and the using method thereof of seabed rig.
Background technology
Seabed resources being carried out drill bit get the final means that core is the Marine Geology exploration, also is the only resource that obtains oil in place.Boring coring also is one of important means of oceanic geotechnical investigation.Using the ODP ship that the seabed is drilled is the main mode that present marine resources are reconnoitred, but this mode is economical inadequately.Drilling at the sea ship tonnage is big, consumes high.At the sea bottom hydrate resource investigation, and the drilling depth of oceanic geotechnical investigation generally advances tens of rice to 200 meters, the development trend of this class probing be to use universal scientific investigation ship carry can the seabed AUTONOMOUS TASK under water rig drill.For understanding in the deposit whether hydrate is arranged, or the hydrocarbon seepage, require usually the halmeic deposit rock core is carried out pressurize, promptly rise to the process on sea from the seabed at rock core, make rock core keep seabed pressure constant, otherwise hydrocarbon gas can distribute with the pressure reduction.Pressurize technical pattern in the past is too complicated, and own wt is big, and less as the common tonnage of scientific investigation ship of rig lash ship under water, deck space and crane weight capacity are all very limited.Existing pressurize technology is not suitable for the pressurize of drill core under water.
At the demand of using rig under water to carry out seabed resources exploration and engineering exploration the present invention has been proposed.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of and supporting halmeic deposit rock core pressurizer and the using method thereof of seabed rig.
The halmeic deposit rock core pressurizer supporting with the seabed rig comprises top cover labyrinth, metal hollow drilling rod, probe tube, lower sealing cover; Be provided with probe tube in the metal hollow drilling rod, the metal hollow drilling rod is connected with lower sealing cover with top cover labyrinth by fine thread, top cover labyrinth and lower sealing cover comprise charge valve, top cover, pressure housing, inflatable air cushion, O shape circle respectively, be provided with top cover, inflatable air cushion in the pressure housing, be provided with O shape circle between pressure housing and top cover, the inflatable air cushion, top cover is provided with charge valve.
The internal diameter of described metal hollow drilling rod is 40～200 millimeters, 5～20 millimeters of wall thickness, and 2 to 3 meters of single-unit length, metal hollow drilling rod upper end is an internal thread for external screw thread, lower end.
Described probe tube is a thin-wall pipes, the internal diameter coupling of its external diameter, length and metal hollow drilling rod, and wall thickness is no more than 5 millimeters.
As follows with the step of the using method of the supporting halmeic deposit rock core pressurizer of seabed rig:
1) calculate top cover labyrinth and the required preliminary filling gas pressure of lower sealing cover according to the depth of water by following empirical formula, by special-purpose inflatable tool, inflatable air cushion inflated with nitrogen or air in top cover labyrinth and lower sealing cover, inflatable air cushion pushes up outward, and empirical formula is: P
i/ P
b=1.7 * 10
3* P
b+ 0.018, P
iBe the pressure of air cushion preliminary filling gas, P
bBe seabed pressure, unit is MPa;
2) after the seabed rig arrived the seabed from the sea, inflatable air cushion was compressed by seawater in top cover labyrinth and the lower sealing cover, and it is minimum that volume reduces to, and inflatable air cushion is pressed close to top cover labyrinth and lower sealing cover;
3) probe tube that will be full of sample is promoted to well head one by one and puts temporarily after probing finishes, the metal hollow drilling rod is pulled out one by one, whenever extract one, be about to the probe tube that a joint is full of sample and put into wherein, and be screwed into top cover labyrinth and lower sealing cover in the metal hollow two ends of drill;
4) rig is when the seabed rises to the sea, the metal hollow drilling rod that has sample and probe tube increases because of ocean temperature, external pressure reduces and expands, compressed nitrogen or air balance in the inflatable air cushion that formed pressure drop is set up by top cover labyrinth and lower sealing cover, press in keeping and stablize, realize pressure holding function.
The present invention and the supporting use of rig under water, the process that can make halmeic deposit extract the sea from the seabed keeps original position pressure, and guarantees that hydrocarbon gas such as methane does not does not scatter and disappear, and hydrate does not melt.The present invention is suitable for using the boring coring of rig team marine sediment under water, can be widely used in marine resources and reconnoitre, and especially hydrate and deep water hydrocarbon resource also are suitable for the engineer geological prospecting boring coring of large-scale petroleum platform addressing process.
Description of drawings
Fig. 1 is and the supporting halmeic deposit rock core pressurize scenario-frame schematic diagram of seabed rig;
Fig. 2 is a top cover labyrinth structural representation of the present invention;
Fig. 3 is a lower sealing cover structural representation of the present invention;
Among the figure: top cover labyrinth 1, metal hollow drilling rod 2, probe tube 3, lower sealing cover 4, charge valve 5, top cover 6, pressure housing 7, inflatable air cushion 8, O shape circle 9.。
The specific embodiment
As shown in Figure 1, 2, 3 and the supporting halmeic deposit rock core pressurizer of seabed rig comprise top cover labyrinth 1, metal hollow drilling rod 2, probe tube 3, lower sealing cover 4; Be provided with probe tube 3 in the metal hollow drilling rod 2, metal hollow drilling rod 2 is connected with lower sealing cover 4 with top cover labyrinth 1 by fine thread, top cover labyrinth and lower sealing cover comprise charge valve 5, top cover 6, pressure housing 7, inflatable air cushion 8, O shape circle 9 respectively, be provided with top cover 6, inflatable air cushion 8 in the pressure housing 7, be provided with O shape circle 9 between pressure housing 7 and top cover 6, the inflatable air cushion 8, top cover 6 is provided with charge valve 5.
The described metal hollow drilling rod 2 double pressurize tubes of doing, the internal diameter of metal hollow drilling rod 2 is 40～200 millimeters, 5～20 millimeters of wall thickness, 2 to 3 meters of single-unit length, metal hollow drilling rod 2 upper ends are that external screw thread, lower end are internal thread.When sampling, metal hollow drilling rod 2 links to each other by joint; After getting core and finishing, the probe tube 3 that will be full of sample is inserted in the metal hollow drilling rod 2, and metal hollow drilling rod 2 is connected with lower sealing cover 4 with top cover labyrinth 1 by fine thread, realizes pressure holding function by O shape circle 9, top cover labyrinth 1 and lower sealing cover 4.
Described probe tube 3 is a thin-wall pipes, the internal diameter coupling of its external diameter, length and metal hollow drilling rod (2), and wall thickness is no more than 5 millimeters.
As follows with the step of the using method of the supporting halmeic deposit rock core pressurizer of seabed rig:
1) calculates the required preliminary filling gas pressure of top cover labyrinth 1 and lower sealing cover 4 according to the depth of water by following empirical formula, by special-purpose inflatable tool, inflatable air cushion 8 inflated with nitrogen or air in top cover labyrinth 1 and lower sealing cover 4, inflatable air cushion 8 outer tops, empirical formula is: P
i/ P
b=1.7 * 10
3* P
b+ 0.018, P
iBe the pressure of air cushion preliminary filling gas, P
bBe seabed pressure, unit is MPa;
2) after the seabed rig arrives the seabed from the sea, inflatable air cushion 8 is compressed by seawater in top cover labyrinth 1 and the lower sealing cover 4, and it is minimum that volume reduces to, and inflatable air cushion 8 is pressed close to top cover labyrinth 1 and lower sealing cover 4, there is charge valve 5 in the outside, uses preceding with inflatable air cushion 8 pre-inflated with nitrogen or air;
3) drilling process uses the wire line coring technology, the probe tube 3 that will be full of sample is promoted to well head one by one and puts temporarily after probing finishes, metal hollow drilling rod 2 is pulled out one by one, whenever extract one, being about to the probe tube 3 that a joint is full of sample puts into wherein, and being screwed into top cover labyrinth 1 and lower sealing cover 4 at metal hollow drilling rod 2 two ends, this process is finished by programme controlled manipulator;
4) rig is when the seabed rises to the sea, the metal hollow drilling rod 2 that has sample and probe tube 3 increases because of ocean temperature, external pressure reduces and expands, compressed nitrogen or air balance in the inflatable air cushion 8 that formed pressure drop is set up by top cover labyrinth 1 and lower sealing cover 4, therefore press in can keeping and stablize, realize pressure holding function.
Claims (4)
1. one kind and the supporting halmeic deposit rock core pressurizer of seabed rig is characterized in that comprising top cover labyrinth (1), metal hollow drilling rod (2), probe tube (3), lower sealing cover (4); Be provided with probe tube (3) in the metal hollow drilling rod (2), metal hollow drilling rod (2) is connected with lower sealing cover (4) with top cover labyrinth (1) by fine thread, top cover labyrinth and lower sealing cover comprise charge valve (5), top cover (6), pressure housing (7), inflatable air cushion (8), O shape circle (9) respectively, be provided with top cover (6), inflatable air cushion (8) in the pressure housing (7), be provided with O shape circle (9) between pressure housing (7) and top cover (6), the inflatable air cushion (8), top cover (6) is provided with charge valve (5).
2. a kind of and supporting halmeic deposit rock core pressurizer of seabed rig as claimed in claim 1, the internal diameter that it is characterized in that described metal hollow drilling rod (2) is 40～200 millimeters, 5～20 millimeters of wall thickness, 2 to 3 meters of single-unit length, metal hollow drilling rod (2) upper end is an internal thread for external screw thread, lower end.
3. a kind of and supporting halmeic deposit rock core pressurize scheme of seabed rig as claimed in claim 1 is characterized in that described probe tube (3) is a thin-wall pipes, the internal diameter coupling of its external diameter, length and metal hollow drilling rod (2), and wall thickness is no more than 5 millimeters.
4. the using method of the supporting halmeic deposit rock core pressurizer of an as claimed in claim 1 and seabed rig is characterized in that its step is as follows:
1) calculates top cover labyrinth (1) and the required preliminary filling gas pressure of lower sealing cover (4) according to the depth of water by following empirical formula, by special-purpose inflatable tool, inflatable air cushion (8) inflated with nitrogen or air in top cover labyrinth (1) and lower sealing cover (4), the outer top of inflatable air cushion (8), empirical formula is: P
i/ P
b=1.7 * 10
3* P
b+ 0.018, P
iBe the pressure of air cushion preliminary filling gas, P
bBe seabed pressure, unit is MPa;
2) after the seabed rig arrived the seabed from the sea, inflatable air cushion (8) was compressed by seawater in top cover labyrinth (1) and the lower sealing cover (4), and it is minimum that volume reduces to, and inflatable air cushion (8) is pressed close to top cover labyrinth (1) and lower sealing cover (4);
3) probe tube (3) that will be full of sample is promoted to well head one by one and puts temporarily after probing finishes, metal hollow drilling rod (2) is pulled out one by one, whenever extract one, be about to the probe tube (3) that a joint is full of sample and put into wherein, and be screwed into top cover labyrinth (1) and lower sealing cover (4) at metal hollow drilling rod (2) two ends;
4) rig is when the seabed rises to the sea, the metal hollow drilling rod (2) that has sample and probe tube (3) increases because of ocean temperature, external pressure reduces and expands, interior compressed nitrogen or the air balance of inflatable air cushion (8) that formed pressure drop is set up by top cover labyrinth (1) and lower sealing cover (4), press in keeping and stablize, realize pressure holding function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110056030 CN102182414B (en) | 2011-03-09 | 2011-03-09 | Deep-sea sediment core pressure-maintaining device matched with submarine drilling rig and method for using deep-sea sediment core pressure-maintaining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110056030 CN102182414B (en) | 2011-03-09 | 2011-03-09 | Deep-sea sediment core pressure-maintaining device matched with submarine drilling rig and method for using deep-sea sediment core pressure-maintaining device |
Publications (2)
| Publication Number | Publication Date |
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| CN102182414A true CN102182414A (en) | 2011-09-14 |
| CN102182414B CN102182414B (en) | 2013-12-25 |
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|---|---|---|---|
| CN 201110056030 Expired - Fee Related CN102182414B (en) | 2011-03-09 | 2011-03-09 | Deep-sea sediment core pressure-maintaining device matched with submarine drilling rig and method for using deep-sea sediment core pressure-maintaining device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105143594A (en) * | 2013-01-21 | 2015-12-09 | 自然环境研究委员会 | Determining gas content of a core sample |
| CN108152075A (en) * | 2017-11-30 | 2018-06-12 | 浙江大学 | Utilize the fan-shaped deep earth sampling device of titanium alloy thin films sealing pressurize |
| CN109552730A (en) * | 2018-11-08 | 2019-04-02 | 湖南科技大学 | A kind of fast packing box for dividing sample to save suitable for seabottom geology sample |
| WO2020034360A1 (en) * | 2018-08-13 | 2020-02-20 | 四川大学 | Constant-temperature and constant-pressure core preservation chamber |
| CN111042757A (en) * | 2019-12-31 | 2020-04-21 | 山东大学 | Deep sea electric-driven drilling integrated clamping operation seabed crusting sampling device |
| CN111911106A (en) * | 2020-08-07 | 2020-11-10 | 盾构及掘进技术国家重点实验室 | Fishing device for taking out shallow drilling core and using method thereof |
| CN112031689A (en) * | 2020-08-31 | 2020-12-04 | 中油国家油气钻井装备工程技术研究中心有限公司 | Protective cap storage and release mechanism for submarine drilling rig |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105143594A (en) * | 2013-01-21 | 2015-12-09 | 自然环境研究委员会 | Determining gas content of a core sample |
| CN108152075A (en) * | 2017-11-30 | 2018-06-12 | 浙江大学 | Utilize the fan-shaped deep earth sampling device of titanium alloy thin films sealing pressurize |
| CN108152075B (en) * | 2017-11-30 | 2023-08-18 | 浙江大学 | Fan-shaped deep sea sampling device utilizing titanium alloy film for sealing and pressure maintaining |
| WO2020034360A1 (en) * | 2018-08-13 | 2020-02-20 | 四川大学 | Constant-temperature and constant-pressure core preservation chamber |
| CN109552730A (en) * | 2018-11-08 | 2019-04-02 | 湖南科技大学 | A kind of fast packing box for dividing sample to save suitable for seabottom geology sample |
| CN109552730B (en) * | 2018-11-08 | 2023-09-12 | 湖南科技大学 | Quick packaging box suitable for sub-sea geological sample divides appearance to preserve |
| CN111042757A (en) * | 2019-12-31 | 2020-04-21 | 山东大学 | Deep sea electric-driven drilling integrated clamping operation seabed crusting sampling device |
| CN111911106A (en) * | 2020-08-07 | 2020-11-10 | 盾构及掘进技术国家重点实验室 | Fishing device for taking out shallow drilling core and using method thereof |
| CN112031689A (en) * | 2020-08-31 | 2020-12-04 | 中油国家油气钻井装备工程技术研究中心有限公司 | Protective cap storage and release mechanism for submarine drilling rig |
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Inventor after: Ye Ying Inventor after: Qin Huawei Inventor after: An Li Inventor after: Ye Wei Inventor after: Chen Jiawang Inventor before: Ye Ying Inventor before: Qin Huawei Inventor before: Ye Wei Inventor before: Chen Jiawang |
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