CN114000845A - Pressure maintaining cylinder, seabed pressure maintaining coring drilling machine and using method - Google Patents
Pressure maintaining cylinder, seabed pressure maintaining coring drilling machine and using method Download PDFInfo
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- CN114000845A CN114000845A CN202111333531.9A CN202111333531A CN114000845A CN 114000845 A CN114000845 A CN 114000845A CN 202111333531 A CN202111333531 A CN 202111333531A CN 114000845 A CN114000845 A CN 114000845A
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- 238000005553 drilling Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005070 sampling Methods 0.000 claims abstract description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000005755 formation reaction Methods 0.000 claims description 4
- 210000000080 chela (arthropods) Anatomy 0.000 claims 7
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims 2
- 241001330002 Bambuseae Species 0.000 claims 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 2
- 239000011425 bamboo Substances 0.000 claims 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 11
- 239000013535 sea water Substances 0.000 abstract description 3
- 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 4
- 239000013049 sediment Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 244000005700 microbiome Species 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
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000000694 effects Effects 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
- 229910052500 inorganic mineral Inorganic materials 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
- 239000011707 mineral Substances 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
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Classifications
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- 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
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- 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
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- 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 seabed pressure maintaining coring drilling machine and a using method thereof. The invention has the beneficial effects that: the one-way valve is arranged on the base of the pressure-holding cylinder, so that the pressure inside the pressure-holding cylinder is continuously increased in the process that the submarine drilling machine is lowered from the sea surface to the seabed, specifically, seawater is influenced by the pressure in the lowering process and passively flows into the pressure-holding cylinder from the one-way valve, and finally the pressure inside the pressure-holding cylinder is equal to the seabed pressure. In the process that the submarine drilling machine is recovered from the seabed to the deck surface of the mother ship, the pressure loss in the pressure maintaining cylinder is limited by the overflow valve and the one-way valve, and the purpose of pressure maintaining and sampling is achieved.
Description
Technical Field
The invention relates to the technical field of seabed drilling sampling, in particular to a pressure maintaining cylinder, a seabed pressure maintaining coring drilling machine and a using method.
Background
The coring of the seabed sediments has important significance for recognizing the change of the earth environment, predicting the long-term change of the future climate, searching new seabed energy (such as natural gas hydrate), researching the diversity of extreme marine microorganisms, developing and applying biological gene resources and the like.
When natural gas hydrate and overlying sediments thereof are collected, because the traditional coring tool cannot hold pressure for coring, the natural gas hydrate and other gas phase components in a sample are lost, and the original components and the state of the sediments are difficult to accurately reflect, so that adverse effects can be caused when natural gas hydrate mineralization conditions are analyzed, hydrate mineral deposit characteristic marks are searched, the hydrate distribution range is defined, and resource perspective evaluation is carried out; when the submarine sediment sample containing the barotropic microorganisms is collected, the traditional coring tool cannot hold pressure to core, so that the metabolic activity of the barotropic bacteria is reduced, the generation time 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 seabed pressure maintaining coring drilling machine and a using method, and mainly solves the problem that the traditional coring tool cannot perform pressure maintaining coring.
In order to solve the technical problem, the invention provides a pressure maintaining cylinder in a first aspect, which comprises an outer cylinder, and a top cover and a base which are respectively in threaded connection with the upper end and the lower end of the outer cylinder, wherein a one-way valve and an overflow valve are installed on the side wall of the base, the outlet end of the one-way valve is located inside the base, and the outlet end of the overflow valve is located outside the base.
In some embodiments, the upper ends of the check valve and the overflow valve are provided with limiting rings.
In some embodiments, the inlet end of the one-way valve is fitted with a pressure measuring quick connector.
The invention provides a seabed pressure maintaining coring drilling machine, which comprises a drilling frame and the pressure maintaining cylinder, wherein a liftable 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 moving manipulator are respectively arranged on the left side and the right side of the upper bottom clamp and the lower bottom clamp, the pipe storage rack and the pipe moving manipulator are both fixed on the drilling frame, and the pipe storage rack is used for placing the pressure maintaining cylinder, the upper part of a coring tool, the lower part of the coring tool and a BHA tool.
In some embodiments, the storage rack is a rotary carousel storage rack.
In some embodiments, the upper end of the top jaw is connected to the fixed end of the power head by a stroke 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 seabed pressure maintaining coring drilling machine, which is used for the seabed pressure maintaining coring 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 with the BHA tool;
secondly, for soft formations, the power head presses down to take cores, for hard formations, the power head rotates to press down to add mud for circulation, and the coring tool is recovered after being filled with samples;
thirdly, the upper base clamp and the lower base clamp hold the coring tool, the power head unloads the coring tool from the split joint, and then the pipe moving manipulator temporarily stores the upper part of the coring tool and the lower part of the coring tool in the rotary disc type drill pipe storage rack;
fourthly, the pipe moving manipulator puts 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 unscrews the top cover from the upper end of the outer cylinder and then ascends;
step five, the tube moving manipulator puts the lower part of the coring tool filled with samples into the outer cylinder from the rotary disc type drill tube storage rack, and then the power head descends and screws the top cover on the upper end of the outer cylinder;
step six, the pipe moving manipulator moves the pressure maintaining cylinder to the rotary disc type drill pipe storage rack;
and step seven, the upper part of the coring tool is connected with the lower part of a new coring tool through the split joint, the step one to the step six are repeated, and a new sampling is carried out until the expected target is completed.
The invention has the beneficial effects that: the one-way valve is arranged on the base of the pressure-holding cylinder, so that the pressure inside the pressure-holding cylinder is continuously increased in the process that the submarine drilling machine is lowered from the sea surface to the seabed, specifically, seawater is influenced by the pressure in the lowering process and passively flows into the pressure-holding cylinder from the one-way valve, and finally the pressure inside the pressure-holding cylinder is equal to the seabed pressure. In the process that the submarine drilling machine is recovered from the seabed to the deck surface of the mother ship, the pressure loss in the pressure maintaining cylinder is limited by the overflow valve and the one-way valve, and the purpose of pressure maintaining and sampling is achieved. The core sample is subjected to pressure maintaining through the pressure maintaining cylinder, the pressure maintaining success rate can be greatly improved, and the pressure loss of the sample from the seabed to the deck surface of the mother ship is avoided.
Drawings
Fig. 1 is a schematic structural 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 structural diagram of a second embodiment of the present invention, which discloses a subsea pressure-maintaining coring drilling rig;
FIG. 4 is a schematic view of a coring tool according to a second embodiment of the present invention;
wherein: 1-pressure maintaining cylinder, 2-drilling rig, 3-power head, 4-top tong, 5-upper bottom tong, 6-lower bottom tong, 7-storage rack, 8-tube moving manipulator, 9-coring tool, 101-outer cylinder, 102-top cover, 103-base, 104-one-way valve, 105-overflow valve, 106-spacing ring, 107-pressure measuring quick joint, 401-stroke hydraulic cylinder, 901-coring tool upper part, 902-coring tool lower part and 903-split joint.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the following detailed description of the present invention is provided with reference to the accompanying drawings and detailed description. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings.
Example one
The embodiment proposes a pressure maintaining cylinder 1, as shown in fig. 1 and 2, which comprises an outer cylinder 101, and a top cover 102 and a base 103 that are respectively in threaded connection with the upper end and the lower end of the outer cylinder 101, wherein a check valve 104 and an overflow valve 105 are installed on the side wall of the base 103, the outlet end of the check valve 104 is located inside the base 103, and the outlet end of the overflow valve 105 is located outside the base 103.
In this embodiment, by installing the check valve 104 on the base 103 of the pressure-holding cylinder 1, it is ensured that the pressure inside the pressure-holding cylinder 1 continuously increases during the process of lowering the subsea drilling machine from the sea surface to the seabed, specifically, seawater is influenced by the pressure during the lowering process and passively flows into the pressure-holding cylinder 1 from the check valve 104, and finally, the pressure inside the pressure-holding cylinder 1 is equal to the seabed pressure. In the process that the submarine drilling machine is recovered from the seabed to the deck surface of the mother ship, the pressure loss in the pressure maintaining cylinder 1 is limited by the overflow valve 105 and the one-way valve 104, and the purposes of pressure maintaining and sampling are achieved. The core sample is subjected to pressure maintaining through the pressure maintaining cylinder 1, the pressure maintaining success rate can be greatly improved, and the pressure loss of the sample from the seabed to the deck surface of the mother ship is avoided.
Considering that the coring tool 9 loaded with a sample sinks to the bottom of the base 103 under the action of gravity in the process of placing the coring tool 9 into the pressure-maintaining cylinder 1, in order to prevent the coring tool 9 from mechanically damaging the check valve 104 and the overflow valve 105, the upper ends of the check valve 104 and the overflow valve 105 are provided with the limit ring 106, and through the setting of the limit ring 106, the coring tool 9 is limited by the limit 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 quickly test the pressure inside the pressure maintaining cylinder 1 by directly inserting a pressure measuring instrument into the pressure measuring quick connector 107, so as to judge whether the sample in the pressure maintaining cylinder 1 reaches the standard.
Example two
The embodiment provides a seabed pressure maintaining coring drilling machine, as shown in fig. 1-4, which comprises a drilling frame 2 and a pressure maintaining cylinder 1 according to the first embodiment, wherein a liftable power head 3 is arranged at 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 moving manipulator 8 are respectively arranged at 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 moving manipulator 8 are both fixed on the drilling frame, and the pipe storage rack 7 is used for placing the pressure maintaining cylinder 1, the upper part 901 of a coring tool, the lower part 902 of a coring tool and a BHA tool. By arranging the double-bottom tongs (the upper bottom tong 5 and the lower bottom tong 6), the verticality of the drill rod and the drilling tool is obviously improved, the problem that the drill rod, the drilling tool and the power head are not aligned when a single tong is used is avoided, and the operation success rate of additionally connecting the drill rod is greatly improved.
The storage pipe rack 7 is a rotary disc type drill pipe storage pipe rack which is a rotary device and can be used for hanging a plurality of tubular objects.
The upper end of the top jaw 4 is connected with the fixed end of the power head 3 through a stroke hydraulic cylinder 401. The installation of the top tong 4 can play a role in centering when the power head 3 is used for connecting and disconnecting a drill rod, the difficulty in connecting and disconnecting the drill rod by the submarine drilling machine is reduced, the stroke hydraulic cylinder 401 can control the upper position and the lower position of the top tong 4, the collision between the drill rod and the top tong can be avoided, and the position of the top tong 4 for clamping the drill rod can be freely selected.
The coring tool upper portion 901 and the coring tool lower portion 902 are combined into the 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 capacity is increased, and the drilling depth of the submarine drilling machine is effectively improved.
EXAMPLE III
The embodiment provides a use method of a subsea pressure holding coring drilling machine, which is used for the subsea pressure holding coring drilling machine in the embodiment II and comprises the following steps:
step one, installing a coring tool 9 into a BHA tool, lowering the BHA tool to a preset sampling depth, and rigidly connecting a power head 3 with the BHA tool;
step two, for a soft stratum, the power head 3 is pressed downwards to take a core, for a hard stratum, the power head 3 rotates to press downwards to add slurry for circulation, and the coring tool 9 is used for taking a full sample and then recovering the sample;
step three, the upper bottom tong 5 and the lower bottom tong 6 clamp the coring tool 9, the power head 3 unloads the coring tool 9 from the split joint 903, and then the pipe moving manipulator 8 temporarily stores the upper part 901 and the lower part 902 of the coring tool in a 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;
step five, the tube moving manipulator 8 puts the lower part 902 of the coring tool filled with samples into the outer cylinder 101 from the rotary disc type drill tube storage rack, and then the power head 3 descends and screws the top cover 102 on the upper end of the outer cylinder 101;
step six, the pipe moving manipulator 5 moves the pressure maintaining cylinder 1 to a rotary disc type drill pipe storage rack;
and step seven, connecting the upper part 901 of the coring tool with the lower part 902 of a new coring tool through a split joint 903, repeating the steps from the first step to the sixth step, and carrying out new sampling until the expected target is completed.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (8)
1. The pressure maintaining cylinder is characterized by comprising an outer cylinder, a top cover and a base, wherein the top cover and the base are in threaded connection with the upper end and the lower end of the outer cylinder respectively, a one-way valve and an overflow valve are installed on the side wall of the base, the outlet end of the one-way valve is located inside the base, and the outlet end of the overflow valve is located outside the base.
2. The pressure maintaining cylinder as claimed in claim 1, wherein the check valve and the upper end of the overflow valve are provided with limit rings.
3. The pressure maintaining cylinder as claimed in claim 1, wherein an inlet end of the check valve is mounted with a pressure measuring quick coupling.
4. The utility model provides a seabed pressurize coring drilling machine, includes the rig, its characterized in that, still includes according to any one of claim 1-3 a section of thick bamboo of pressurize, the top center of rig is equipped with the unit head of liftable, the lower extreme of unit head is equipped with the top pincers, the bottom of rig is installed upper base pincers and lower base pincers, upper base pincers with lower base pincers with the coaxial setting of unit head, upper base pincers with the left and right sides of lower base pincers is equipped with storage tube frame and moves a tub manipulator respectively, the storage tube frame with it all fixes to move a tub manipulator on the rig, the storage tube frame is used for placeeing a section of thick bamboo of pressurize, core instrument upper portion, core instrument lower part and BHA instrument.
5. The subsea pressure holding coring drilling rig of claim 4, wherein the storage rack is a rotary disk drill pipe storage rack.
6. The subsea dwell coring drill of claim 5, wherein the upper end of the top clamp is connected to the fixed end of the power head by a stroke hydraulic cylinder.
7. The subsea dwell coring drilling rig of claim 6, wherein the coring tool upper portion and the coring tool lower portion are combined as a coring tool by a split joint.
8. The use method of the sea bottom pressure maintaining coring drilling machine is used for the sea bottom pressure maintaining coring drilling machine according to claim 7, and is characterized by comprising 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 with the BHA tool;
secondly, for soft formations, the power head presses down to take cores, for hard formations, the power head rotates to press down to add mud for circulation, and the coring tool is recovered after being filled with samples;
thirdly, the upper base clamp and the lower base clamp hold the coring tool, the power head unloads the coring tool from the split joint, and then the pipe moving manipulator temporarily stores the upper part of the coring tool and the lower part of the coring tool in the rotary disc type drill pipe storage rack;
fourthly, the pipe moving manipulator puts 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 unscrews the top cover from the upper end of the outer cylinder and then ascends;
step five, the tube moving manipulator puts the lower part of the coring tool filled with samples into the outer cylinder from the rotary disc type drill tube storage rack, and then the power head descends and screws the top cover on the upper end of the outer cylinder;
step six, the pipe moving manipulator moves the pressure maintaining cylinder to the rotary disc type drill pipe storage rack;
and step seven, the upper part of the coring tool is connected with the lower part of a new coring tool through the split joint, the step one to the step six are repeated, and a new sampling is carried out until the expected target is completed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| 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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| CN114000845A true CN114000845A (en) | 2022-02-01 |
| CN114000845B CN114000845B (en) | 2024-07-12 |
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Cited By (1)
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| CN116792086A (en) * | 2023-06-26 | 2023-09-22 | 广州海洋地质调查局 | In-situ temperature measurement system and method for deep sea sediment of submarine drilling machine |
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| Publication number | Publication date |
|---|---|
| CN114000845B (en) | 2024-07-12 |
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