CN114000845B - Pressure maintaining cylinder, seabed pressure maintaining core drilling machine and use method - Google Patents
Pressure maintaining cylinder, seabed pressure maintaining core drilling machine and use method Download PDFInfo
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- CN114000845B CN114000845B CN202111333531.9A CN202111333531A CN114000845B CN 114000845 B CN114000845 B CN 114000845B CN 202111333531 A CN202111333531 A CN 202111333531A CN 114000845 B CN114000845 B CN 114000845B
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- pressure maintaining
- pressure
- coring tool
- coring
- power head
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- 238000005553 drilling Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005070 sampling Methods 0.000 claims abstract description 9
- 238000012423 maintenance Methods 0.000 claims 2
- 230000008569 process Effects 0.000 abstract description 10
- 239000013535 sea water Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 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 5
- 210000000080 chela (arthropods) Anatomy 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
- E21B25/08—Coating, freezing, consolidating cores; Recovering uncontaminated cores or cores at formation pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
- E21B25/18—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver being specially adapted for operation under water
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sampling And Sample Adjustment (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a pressure maintaining cylinder, a submarine pressure maintaining core drill and a use method. The beneficial effects of the invention are as follows: by installing the one-way valve on the base of the pressure maintaining cylinder, the pressure inside the pressure maintaining cylinder is ensured to be continuously increased in the process that the submarine drilling machine is lowered to the seabed from the sea surface, and the method is characterized in that seawater is influenced by the pressure in the lowering process, passively flows into the pressure maintaining cylinder from the one-way valve, and finally the pressure inside the pressure maintaining cylinder is equal to the pressure inside the seabed. In the process that the submarine drilling machine is recovered to the deck surface of the mother ship from the seabed, the overflow valve and the one-way valve limit the pressure loss in the pressure maintaining cylinder together, so that the purpose of pressure maintaining and sampling is achieved.
Description
Technical Field
The invention relates to the technical field of submarine drilling sampling, in particular to a pressure maintaining cylinder, a submarine pressure maintaining core drilling machine and a use method.
Background
The coring of the submarine sediment has important significance in the aspects of knowing the earth environment transition, predicting the future climate long-term change, searching new submarine energy sources (such as natural gas hydrate), researching the diversity of marine extreme microorganisms, developing and applying biological gene resources and the like.
When collecting natural gas hydrate and deposits on the natural gas hydrate, the traditional coring tool cannot keep pressure and core, so that the natural gas hydrate and other gas phase components in a sample are scattered, the original components and states of the deposits are difficult to accurately reflect, and adverse effects are caused for analyzing the mineral formation conditions of the natural gas hydrate, searching hydrate mineral deposit characteristic marks, defining the distribution range of the hydrate and carrying out resource perspective evaluation; when collecting a seabed sediment sample containing barophilic microorganisms, the traditional coring tool cannot hold pressure and core, so that the metabolic activity of barophilic bacteria is reduced, the time period is long, the growth is not vigorous, and the growth period is long.
Disclosure of Invention
Aiming at the problems, the invention provides a pressure maintaining cylinder, a submarine pressure maintaining coring drilling machine and a use method, and mainly solves the problem that the traditional coring tool cannot maintain pressure for coring.
In order to solve the technical problems, the first aspect of the invention provides a pressure maintaining cylinder, which comprises an outer cylinder, a top cover and a base, wherein the top cover and the base are respectively in threaded connection with the upper end and the lower end of the outer cylinder, a one-way valve and an overflow valve are arranged on the side wall of the base, the outlet end of the one-way valve is positioned in the base, and the outlet end of the overflow valve is positioned outside the base.
In some embodiments, the check valve and the overflow valve are provided with a stop collar at their upper ends.
In some embodiments, the inlet end of the one-way valve is fitted with a pressure measuring quick connector.
The invention provides a submarine pressure-maintaining coring drilling machine, which comprises a drilling frame and further comprises the pressure-maintaining barrel, wherein a lifting power head is arranged in the center of the top of the drilling frame, a top clamp is arranged at the lower end of the power head, an upper bottom clamp and a lower bottom clamp are arranged at the bottom of the drilling frame, the upper bottom clamp and the lower bottom clamp are coaxially arranged with the power head, a pipe storage rack and a pipe shifting manipulator are respectively arranged at the left side and the right side of the upper bottom clamp and the lower bottom clamp, the pipe storage rack and the pipe shifting manipulator are both fixed on the drilling frame, and the pipe storage rack is used for placing the pressure-maintaining barrel, the upper part of a coring tool, the lower part of the coring tool and a BHA tool.
In some embodiments, the storage tube rack is a rotary disc drill pipe storage tube rack.
In some embodiments, the upper end of the top clamp is connected with the fixed end of the power head through a stroke hydraulic cylinder.
In some embodiments, the coring tool upper portion and the coring tool lower portion are combined into a coring tool by a split joint.
The third aspect of the invention provides a use method of a submarine pressure-maintaining core drilling machine, which is used for the submarine pressure-maintaining core drilling machine and comprises the following steps:
step one, installing the coring tool into the BHA tool, lowering the BHA tool to a predetermined sampling depth, and rigidly connecting the power head and the BHA tool;
Step two, for soft stratum, the power head is pressed down for coring, and for hard stratum, the power head is rotated to be pressed down for mud circulation, and the coring tool is recovered after taking a full sample;
Step three, the upper bottom clamp and the lower bottom clamp the coring tool, the power head is used for detaching the coring tool from the split joint, and then the pipe shifting manipulator is used for temporarily storing the upper part of the coring tool and the lower part of the coring tool into the rotary disc type drill pipe storage rack;
fourthly, the pipe moving manipulator places the pressure maintaining cylinder below the power head, the upper bottom clamp and the lower bottom clamp the pressure maintaining cylinder, and the power head rotates the top cover away from the upper end of the outer cylinder and then ascends;
fifthly, the pipe shifting manipulator puts the lower part of the coring tool filled with the sample into the outer barrel from the rotary disc type drill pipe storage rack, and then the power head descends and screws the top cover at the upper end of the outer barrel;
Step six, the pipe moving manipulator moves the pressure maintaining cylinder to the rotary disc type drill pipe storage pipe rack;
and step seven, connecting the upper part of the coring tool with the lower part of a new coring tool through the split joint, repeating the steps one to six, and sampling for a new time until the expected target is completed.
The beneficial effects of the invention are as follows: by installing the one-way valve on the base of the pressure maintaining cylinder, the pressure inside the pressure maintaining cylinder is ensured to be continuously increased in the process that the submarine drilling machine is lowered to the seabed from the sea surface, and the method is characterized in that seawater is influenced by the pressure in the lowering process, passively flows into the pressure maintaining cylinder from the one-way valve, and finally the pressure inside the pressure maintaining cylinder is equal to the pressure inside the seabed. In the process that the submarine drilling machine is recovered to the deck surface of the mother ship from the seabed, the overflow valve and the one-way valve limit the pressure loss in the pressure maintaining cylinder together, so that the purpose of pressure maintaining and sampling is achieved. The pressure maintaining cylinder is used for maintaining the pressure of the coring sample, so that the pressure maintaining success rate can be greatly improved, and the pressure loss of the sample from the sea bottom to the deck surface of the mother ship is avoided.
Drawings
FIG. 1 is a schematic diagram of a pressure maintaining cylinder according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 taken along line A;
FIG. 3 is a schematic view of a submarine pressure maintaining coring drilling machine according to a second embodiment of the present invention;
FIG. 4 is a schematic illustration of the structure of a coring tool as disclosed in accordance with a second embodiment of the present invention;
Wherein: the pressure maintaining device comprises a 1-pressure maintaining cylinder, a 2-drilling frame, a 3-power head, a 4-top clamp, a 5-upper bottom clamp, a 6-lower bottom clamp, a 7-pipe storage frame, an 8-pipe shifting manipulator, a 9-coring tool, a 101-outer cylinder, a 102-top cover, a 103-base, a 104-one-way valve, a 105-overflow valve, a 106-limiting ring, a 107-pressure measuring quick connector, a 401-stroke hydraulic cylinder, a 901-coring tool upper part, a 902-coring tool lower part and a 903-split connector.
Detailed Description
The present invention will be described in further detail with reference to the drawings and the detailed description below, in order to make the objects, technical solutions and advantages of the present invention more clear and distinct. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the matters related to the present invention are shown in the accompanying drawings.
Example 1
The embodiment provides a pressure maintaining cylinder 1, as shown in fig. 1 and 2, the pressure maintaining cylinder comprises an outer cylinder 101, and a top cover 102 and a base 103 which are respectively in threaded connection with the upper end and the lower end of the outer cylinder 101, a one-way valve 104 and an overflow valve 105 are arranged on the side wall of the base 103, the outlet end of the one-way valve 104 is positioned in the base 103, and the outlet end of the overflow valve 105 is positioned outside the base 103.
In this embodiment, by installing the one-way valve 104 on the base 103 of the pressure maintaining cylinder 1, the pressure inside the pressure maintaining cylinder 1 is ensured to be continuously increased in the process that the submarine drilling machine is lowered to the seabed from the sea surface, specifically, the seawater is affected by the pressure in the lowering process, the seawater passively flows into the pressure maintaining cylinder 1 from the one-way valve 104, and finally the pressure inside the pressure maintaining cylinder 1 is equal to the pressure on the seabed. In the process that the submarine drilling machine is recovered to the deck surface of the mother ship from the seabed, the overflow valve 105 and the one-way valve 104 limit the pressure loss in the pressure maintaining cylinder 1 together, so that the purpose of pressure maintaining and sampling is achieved. The pressure maintaining cylinder 1 is used for maintaining the pressure of the coring sample, so that the pressure maintaining success rate can be greatly improved, and the pressure loss of the sample from the sea bottom to the deck surface of the mother ship is avoided.
Considering that the coring tool 9 loaded with the sample is placed into the pressure maintaining cylinder 1, the coring tool 9 finally can sink to the bottom of the base 103 under the action of gravity, and in order to avoid the coring tool 9 from mechanically damaging the check valve 104 and the overflow valve 105, a limiting ring 106 is arranged at the upper ends of the check valve 104 and the overflow valve 105, and through the arrangement of the limiting ring 106, the coring tool 9 is limited by the limiting ring 106 in the falling process and cannot touch and damage the check valve 104 and the overflow valve 105, so that the air tightness failure of the pressure maintaining cylinder 1 caused by the damage of the check valve 104 and the overflow valve 105 is effectively avoided.
Further, the inlet end of the check valve 104 is provided with a pressure measuring quick connector 107. After the pressure maintaining cylinder 1 is recovered to the ship, an engineer can rapidly test the pressure inside the pressure maintaining cylinder 1 by directly inserting a pressure measuring instrument into the pressure measuring quick connector 107, thereby judging whether the sample inside the pressure maintaining cylinder 1 meets the standard.
Example two
The embodiment provides a submarine pressure-maintaining coring drilling machine, as shown in fig. 1-4, the submarine pressure-maintaining coring drilling machine comprises a drilling frame 2, and further comprises an embodiment I, a pressure-maintaining cylinder 1, a liftable power head 3 is arranged in the center of the top of the drilling frame 2, a top clamp 4 is arranged at the lower end of the power head 3, an upper bottom clamp 5 and a lower bottom clamp 6 are arranged at the bottom of the drilling frame 1, the upper bottom clamp 5 and the lower bottom clamp 6 are coaxially arranged with the power head 3, a pipe storage rack 7 and a pipe shifting manipulator 8 are respectively arranged on the left side and the right side of the upper bottom clamp 5 and the lower bottom clamp 6, the pipe storage rack 7 and the pipe shifting manipulator 8 are both fixed on the drilling frame, and the pipe storage rack 7 is used for placing the pressure-maintaining cylinder 1, a coring tool upper part 901, a coring tool lower part 902 and a BHA tool. By arranging the double bottom pliers (the upper bottom pliers 5 and the lower bottom pliers 6), the perpendicularity of the drill rod and the drilling tool is remarkably improved, the problem that the drill rod, the drilling tool and the power head are not centered when a single pliers are used is avoided, and the operation success rate of the drill rod splicing is greatly improved.
The pipe rack 7 is a rotary disk type drill pipe rack, which is a rotary device capable of mounting a plurality of pipes.
The upper end of the top clamp 4 is connected with the fixed end of the power head 3 through a stroke hydraulic cylinder 401. The installation of top pincers 4 can play the effect of righting and centering when unit head 3 connects and unloads the drilling rod, has reduced the undersea rig and has connect the degree of difficulty of unloading the drilling rod, and the stroke pneumatic cylinder 401 can control the upper and lower position of top pincers 4, can avoid the collision of drilling rod and top pincers, also can freely select the position of top pincers 4 centre gripping drilling rod.
The coring tool upper portion 901 and the coring tool lower portion 902 are combined into a coring tool 9 by a split joint 903. The coring tool 9 is divided into an upper part and a lower part from the split joint 903, so that the pressure maintaining cylinder 1 only needs to maintain the pressure of the lower part 902 of the coring tool, the space of the submarine drilling machine is saved, the pipe storage quantity is increased, and the drilling depth of the submarine drilling machine is effectively improved.
Example III
The embodiment provides a use method of a submarine pressure maintaining core drilling machine, which is used for the submarine pressure maintaining core drilling machine in the second embodiment, and comprises the following steps:
step one, installing the coring tool 9 into the BHA tool, lowering the BHA tool to a predetermined sampling depth, and rigidly connecting the power head 3 and the BHA tool;
step two, for soft stratum, the power head 3 is pressed down for coring, for hard stratum, the power head 3 is rotated to be pressed down for slurry circulation, and the coring tool 9 is recovered after taking full samples;
Step three, the upper bottom clamp 5 and the lower bottom clamp 6 clamp the coring tool 9, the power head 3 unloads the coring tool 9 from the split joint 903, and then the pipe shifting manipulator 8 temporarily stores the upper part 901 of the coring tool and the lower part 902 of the coring tool into the rotary disc type drill pipe storage rack;
fourthly, the pipe moving manipulator 8 puts the pressure maintaining cylinder 1 below the power head 3, the upper bottom clamp 5 and the lower bottom clamp 6 clamp the pressure maintaining cylinder 1, and the power head 3 unscrews the top cover 102 from the upper end of the outer cylinder 101 and then ascends;
fifthly, the pipe shifting manipulator 8 puts the lower part 902 of the coring tool filled with the sample into the outer barrel 101 from the rotary disc type drill pipe storage rack, and then the power head 3 descends and screws the top cover 102 on the upper end of the outer barrel 101;
Step six, the pipe shifting manipulator 5 moves the pressure maintaining cylinder 1 to a rotary disc type drill pipe storage pipe rack;
Step seven, the coring tool upper portion 901 is connected to the new coring tool lower portion 902 via the split joint 903, and steps one through six are repeated for a new sample until the desired objective is achieved.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the essence of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. The submarine pressure-maintaining coring drilling machine is characterized by further comprising a pressure maintaining cylinder, wherein the pressure maintaining cylinder comprises an outer cylinder, a top cover and a base, the top cover and the base are respectively connected with the upper end and the lower end of the outer cylinder in a threaded mode, a one-way valve and an overflow valve are arranged on the side wall of the base, the outlet end of the one-way valve is positioned in the base, the outlet end of the overflow valve is positioned outside the base, a lifting power head is arranged in the center of the top of the drilling frame, a top clamp is arranged at the lower end of the power head, an upper bottom clamp and a lower bottom clamp are arranged at the bottom of the drilling frame, the upper bottom clamp and the lower bottom clamp are coaxially arranged with the power head, a pipe storage rack and a pipe shifting manipulator are respectively arranged on the left side and the right side of the upper bottom clamp and the lower bottom clamp, and the pipe shifting manipulator are fixed on the drilling frame, and the pipe storage rack is used for placing the pressure maintaining cylinder, the upper part of the coring tool, the lower part of the coring tool and the BHA tool; the pipe storage rack is a rotary disc type drill pipe storage rack;
The application method of the submarine pressure maintaining core drilling machine comprises the following steps:
step one, installing a coring tool into the BHA tool, lowering the BHA tool to a predetermined sampling depth, and rigidly connecting the power head and the BHA tool;
Step two, for soft stratum, the power head is pressed down for coring, and for hard stratum, the power head is rotated to be pressed down for mud circulation, and the coring tool is recovered after taking a full sample;
Step three, the upper bottom clamp and the lower bottom clamp the coring tool, the power head is used for detaching the coring tool from the split joint, and then the pipe shifting manipulator is used for temporarily storing the upper part of the coring tool and the lower part of the coring tool into the rotary disc type drill pipe storage rack;
fourthly, the pipe moving manipulator places the pressure maintaining cylinder below the power head, the upper bottom clamp and the lower bottom clamp the pressure maintaining cylinder, and the power head rotates the top cover away from the upper end of the outer cylinder and then ascends;
fifthly, the pipe shifting manipulator puts the lower part of the coring tool filled with the sample into the outer barrel from the rotary disc type drill pipe storage rack, and then the power head descends and screws the top cover at the upper end of the outer barrel;
Step six, the pipe moving manipulator moves the pressure maintaining cylinder to the rotary disc type drill pipe storage pipe rack;
and step seven, connecting the upper part of the coring tool with the lower part of a new coring tool through the split joint, repeating the steps one to six, and sampling for a new time until the expected target is completed.
2. The pressure maintaining cylinder according to claim 1, wherein upper ends of the check valve and the overflow valve are provided with a stopper ring.
3. The pressure maintaining cylinder according to claim 1, wherein the inlet end of the one-way valve is provided with a pressure measuring quick connector.
4. The subsea pressure maintenance coring drilling machine of claim 1, wherein the upper end of the top clamp is connected to the fixed end of the power head by a stroke hydraulic cylinder.
5. The subsea pressure maintenance coring drilling machine of claim 1, wherein said coring tool upper portion and said coring tool lower portion are combined into a coring tool by a split joint.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111333531.9A CN114000845B (en) | 2021-11-11 | 2021-11-11 | Pressure maintaining cylinder, seabed pressure maintaining core drilling machine and use method |
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| CN202111333531.9A CN114000845B (en) | 2021-11-11 | 2021-11-11 | Pressure maintaining cylinder, seabed pressure maintaining core drilling machine and use method |
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| CN114000845B true CN114000845B (en) | 2024-07-12 |
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| CN116792086B (en) * | 2023-06-26 | 2024-03-26 | 广州海洋地质调查局 | In-situ temperature measurement method for deep sea sediment of submarine drilling machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN216406752U (en) * | 2021-11-11 | 2022-04-29 | 广州海洋地质调查局 | Pressure maintaining cylinder and seabed pressure maintaining coring drilling machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102606074B (en) * | 2012-04-06 | 2014-04-02 | 杭州电子科技大学 | Novel submarine deep hole pressure maintaining and core drilling rig |
| CN102913162B (en) * | 2012-10-26 | 2015-06-24 | 宝鸡石油机械有限责任公司 | Deep-sea sediment continuous pressure maintaining coring submarine drilling machine and operation method |
| CN107514240B (en) * | 2017-10-13 | 2023-10-17 | 四川大学 | Automatic high stability pressurize coring device of control |
| CN108020438A (en) * | 2018-01-31 | 2018-05-11 | 上海交大海洋水下工程科学研究院有限公司 | The airtight sampler of mechanical hand-held type bottom sediment and its sampling and pressurize method |
| CN108535043B (en) * | 2018-04-04 | 2023-10-13 | 浙江大学 | Piston transfer type deep sea sediment pressure maintaining sampler |
| CN208252070U (en) * | 2018-05-11 | 2018-12-18 | 湖南科技大学 | A kind of seabed drilling machine gas hydrates active pressure maintaining core bit |
| CN108999583B (en) * | 2018-08-13 | 2023-06-30 | 四川大学 | Pressure maintaining cylinder upper sealing structure with explosion-proof function |
| CN111119737B (en) * | 2020-02-18 | 2024-07-02 | 湖南科技大学 | Multi-point pressure-maintaining core-taking micro drilling machine for submarine hard rock |
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| CN216406752U (en) * | 2021-11-11 | 2022-04-29 | 广州海洋地质调查局 | Pressure maintaining cylinder and seabed pressure maintaining coring drilling machine |
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