CN209261516U - A kind of mud gaslift recyclable device for marine drilling operation - Google Patents
A kind of mud gaslift recyclable device for marine drilling operation Download PDFInfo
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- CN209261516U CN209261516U CN201821482826.6U CN201821482826U CN209261516U CN 209261516 U CN209261516 U CN 209261516U CN 201821482826 U CN201821482826 U CN 201821482826U CN 209261516 U CN209261516 U CN 209261516U
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- mud
- surge tank
- well head
- air
- air deflector
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Abstract
A kind of mud gaslift recyclable device for marine drilling operation, it includes well head air deflector, mud surge tank, slurry recovering tube line, auxiliary tube and air compressor machine；The well head air deflector is placed at seafloor wellhead locations, is sleeved on outside drill string, the side pipe of setting connection mud surge tank on well head air deflector side wall；The mud surge tank is placed in subsea wellheads side；Slurry recovering tube line lower end is placed in mud surge tank, and upper end is connect with the shaker systems on drill ship, and the mixing wastewater with air connector being connected to auxiliary tube lower end is arranged in position among slurry recovering tube line；The upper end of the auxiliary tube and the high pressure gas of air compressor machine are exported and are connected；The air compressor machine is arranged on drill ship.The utility model is using no marine riser marine drilling technology, two barometric gradients are formed in drilling process simultaneously, make the surplus between formation fracture pressure and pore pressure is opposite to increase, has achieved the purpose that effective control drilling accident, simplified casing programme, save drilling time.
Description
Technical field
The utility model relates to a kind of mud gaslift recyclable devices for marine drilling operation, belong to drilling at the sea technology
Field.
Background technique
In the prior art, it when carrying out drilling at the sea operation, needs to connect marine riser between drill ship and well head, to establish
Mud veclamation channel, but thus also increase drill ship load；In addition to realizing dual-gradient drilling technology, underwater portion is removed
Outside the conventional equipments such as configuration marine riser, preventer group, choke flow line, also need to increase the facilities such as gas injection pipeline and fill nipple,
Drilling equipment connection structure is caused to complicate.
Utility model content
The utility model provides a kind of mud gaslift recyclable device for marine drilling operation, it is intended to realize without marine riser
Marine drilling technology, while two barometric gradients are formed in drilling process, make between formation fracture pressure and pore pressure
Surplus is opposite to be increased, and is achieved the purpose that effectively to control drilling accident, is simplified casing programme, saves drilling time.
To achieve the above objectives, the present invention adopts the following technical solutions:
A kind of mud gaslift recyclable device for marine drilling operation, including well head air deflector, mud surge tank, return slurry
Pipeline, auxiliary tube and air compressor machine；The well head air deflector is placed at seafloor wellhead locations, is sleeved on outside drill string, the upper end is
The opening of bell shape forms the circular passage for returning on mud, in well head air deflector between well head air deflector and drill string
The side pipe of setting connection mud surge tank on side wall；The mud surge tank is placed in subsea wellheads side, and height is not less than well
Mouth air deflector upper end opening height；Slurry recovering tube line lower end is placed in mud surge tank, the vibrating screen on upper end and drill ship
System connection, the mixing wastewater with air connector being connected to auxiliary tube lower end is arranged in position among slurry recovering tube line；The auxiliary tube it is upper
The high pressure gas of end and air compressor machine, which exports, to be connected；The air compressor machine is arranged on drill ship.
The above-mentioned mud gaslift recyclable device for marine drilling operation, the mixing wastewater with air connector include joint body,
Air inlet and pressure stabilizing cavity；The joint body upper and lower ends are connect with slurry recovering tube line, are welded and are assisted on joint body side wall
The pressure stabilizing cavity of pipe lower end connection, and setting is connected to the air inlet of pressure stabilizing cavity on joint body side wall.
The above-mentioned mud gaslift recyclable device for marine drilling operation, the air inlet hole number are no less than four groups, and edge connects
The circumferencial direction of this body sidewall of head is to being evenly arranged.
The utility model is a kind of mud gaslift recyclable device for marine drilling operation, its working principle is that: drilling well
Mud is transported to shaft bottom out of drill string, flows out from bit nozzle, carries the mud of shaft bottom landwaste from the annular space of the borehole wall and drilling rod
It returns, is flowed into the mud surge tank for being placed on seabed in seabed by the side pipe of well head air deflector, according to law of connected vessels, mud
The mud liquid level of surge tank and the mud liquid level of well head air deflector maintain an equal level, and therefore, pass through liquid level in control mud surge tank
It is able to achieve the control to wellhead slurry liquid level；The utility model connects a mixing wastewater with air also among slurry recovering tube line and connects
Head, mixing wastewater with air connector are exported by the high pressure gas of air compressor machine on auxiliary tube and drill ship and are connected, and high pressure gas is mixed in air water
It is mixed in splice grafting head with mud, air-water mixture is formed, since air-water mixture density is low compared with mud, under mixing wastewater with air connector
Portion forms negative-pressure ward effect, so that mud continually returns on drill ship on the ground；In utility model works process
In, bottom pressure is made of mud pressure in upper ocean water pressure and well, since density of sea water is different from mud density, forms two
The bottom pressure of a gradient can make borehole pressure between formation fracture pressure and pore pressure by adjusting mud property,
Effectively control drilling accident.In conclusion the utility model is using no marine riser marine drilling technology, while in drilling process
Two barometric gradients are formed, makes the surplus between formation fracture pressure and pore pressure is opposite to increase, reaches in effective control hole
Accident, the purpose for simplifying casing programme, saving drilling time.
Detailed description of the invention
Fig. 1 is the utility model structure diagram；
Fig. 2 is schematic enlarged-scale view at I in Fig. 1.
Each list of reference numerals in figure are as follows: 1, well head air deflector, 2, mud surge tank, 3, slurry recovering tube line, 3-1, joint body, 3-
2, pressure stabilizing cavity, 3-3, air inlet, 4, auxiliary tube, 5, air compressor machine, 6, vibration screen system, 7, drill ship, 8, drill string.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the utility model is described in further detail.
Referring to Fig. 1, the utility model is a kind of mud gaslift recyclable device for marine drilling operation, it includes well head
Air deflector 1, mud surge tank 2, slurry recovering tube line 3, auxiliary tube 4 and air compressor machine 5；The well head air deflector 1 is placed in subsea wellheads position
Place is set, 8 outside of drill string is sleeved on, the upper end is the opening of bell shape, is formed and is used between well head air deflector 1 and drill string 8
The circular passage returned on mud, the side pipe of setting connection mud surge tank 2 on 1 side wall of well head air deflector；The mud buffering
Tank 2 is placed in subsea wellheads side, and height is not less than well head air deflector upper end opening height；3 lower end of slurry recovering tube line is placed in
In mud surge tank 2, upper end is connect with the shaker systems 6 on drill ship 7, is arranged and is assisted at the intermediate position of slurry recovering tube line 3
The mixing wastewater with air connector of 4 lower end of pipe connection；The upper end of the auxiliary tube 4 and the high pressure gas of air compressor machine 5 are exported and are connected；The sky
Press 5 is arranged on drill ship 7.
Referring to Fig. 1, Fig. 2, the mud gaslift recyclable device described in the utility model for marine drilling operation, the air water
Hybrid juction includes joint body 3-1, air inlet 3-3 and pressure stabilizing cavity 3-2；The joint body 3-1 upper and lower ends and slurry recovering tube
Line 3 connects, and be welded the pressure stabilizing cavity 3-2 being connected to 4 lower end of auxiliary tube on joint body 3-1 side wall, and in the side joint body 3-1
The air inlet 3-3 of setting connection pressure stabilizing cavity (3-2) on wall, the air inlet 3-3 quantity is no less than four groups, along joint body 3-1
The circumferencial direction of side wall is to being evenly arranged.
Referring to Fig. 1, Fig. 2, the mud gaslift recyclable device described in the utility model for marine drilling operation, work original
Reason is: drilling mud is transported to shaft bottom out of drill string 8, flows out from bit nozzle, carries the mud of shaft bottom landwaste from the borehole wall and bores
It returns, is flowed into the mud surge tank 2 for being placed on seabed in seabed by the side pipe of well head air deflector 1, according to even on the annular space of bar
Logical device principle, the mud liquid level of mud surge tank 2 and the mud liquid level of well head air deflector 1 maintain an equal level, therefore, slow by control mud
It rushes liquid level in tank 2 and is able to achieve the control to wellhead slurry liquid level；The utility model also connects among slurry recovering tube line 3
A mixing wastewater with air connector is connect, which is exported by the high pressure gas of air compressor machine 5 on auxiliary tube 4 and drill ship 7
Connection, high pressure gas mix in mixing wastewater with air connector with mud, air-water mixture are formed, since air-water mixture density is compared with mud
Starch it is low, mixing wastewater with air connector lower part formed negative-pressure ward effect so that mud continually returns on drill ship on the ground；
During utility model works, bottom pressure is made of mud pressure in upper ocean water pressure and well, due to density of sea water
It is different from mud density, the bottom pressure of two gradients is formed, by adjusting mud property, borehole pressure can be made broken between stratum
Between split pressure and pore pressure, to effectively control drilling accident.
Claims (3)
1. a kind of mud gaslift recyclable device for marine drilling operation, characterized in that it includes well head air deflector (1), mud
Starch surge tank (2), slurry recovering tube line (3), auxiliary tube (4) and air compressor machine (5)；The well head air deflector (1) is placed in subsea wellheads position
Place is set, is sleeved on outside drill string (8), the upper end is the opening of bell shape, shape between well head air deflector (1) and drill string (8)
At the circular passage returned on mud, the side pipe of setting connection mud surge tank (2) on well head air deflector (1) side wall；Institute
It states mud surge tank (2) and is placed in subsea wellheads side, height is not less than well head air deflector upper end opening height；The slurry recovering tube
Line (3) lower end is placed in mud surge tank (2), and upper end is connect with the shaker systems (6) on drill ship (7), in slurry recovering tube line
(3) the mixing wastewater with air connector being connected to auxiliary tube (4) lower end is arranged in intermediate position；The upper end of the auxiliary tube (4) and air compressor machine
(5) high pressure gas exports connection；The air compressor machine (5) is arranged on drill ship (7).
2. the mud gaslift recyclable device according to claim 1 for marine drilling operation, characterized in that the air water
Hybrid juction includes joint body (3-1), air inlet (3-3) and pressure stabilizing cavity (3-2)；Joint body (3-1) upper and lower ends
It is connect with slurry recovering tube line (3), be welded the pressure stabilizing cavity (3-2) being connected to auxiliary tube (4) lower end on joint body (3-1) side wall,
And setting is connected to the air inlet (3-3) of pressure stabilizing cavity (3-2) on joint body (3-1) side wall.
3. the mud gaslift recyclable device according to claim 2 for marine drilling operation, characterized in that the air inlet
Hole (3-3) quantity is no less than four groups, and the circumferencial direction along joint body (3-1) side wall is to being evenly arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821482826.6U CN209261516U (en) | 2018-09-11 | 2018-09-11 | A kind of mud gaslift recyclable device for marine drilling operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821482826.6U CN209261516U (en) | 2018-09-11 | 2018-09-11 | A kind of mud gaslift recyclable device for marine drilling operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209261516U true CN209261516U (en) | 2019-08-16 |
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ID=67552731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821482826.6U Active CN209261516U (en) | 2018-09-11 | 2018-09-11 | A kind of mud gaslift recyclable device for marine drilling operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209261516U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810070A (en) * | 2020-06-11 | 2020-10-23 | 中国地质科学院勘探技术研究所 | Core collecting method for gas lift reverse circulation coring process |
| CN114718458A (en) * | 2022-04-01 | 2022-07-08 | 中国石油大学(华东) | Drilling device without riser gas lift and pump lift combined lifting and parameter design method thereof |
-
2018
- 2018-09-11 CN CN201821482826.6U patent/CN209261516U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810070A (en) * | 2020-06-11 | 2020-10-23 | 中国地质科学院勘探技术研究所 | Core collecting method for gas lift reverse circulation coring process |
| CN111810070B (en) * | 2020-06-11 | 2022-03-01 | 中国地质科学院勘探技术研究所 | Core collecting method for gas lift reverse circulation coring process |
| CN114718458A (en) * | 2022-04-01 | 2022-07-08 | 中国石油大学(华东) | Drilling device without riser gas lift and pump lift combined lifting and parameter design method thereof |
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