CN113914796B - Drilling mud wellhead cofferdam device and construction method thereof - Google Patents
Drilling mud wellhead cofferdam device and construction method thereof Download PDFInfo
- Publication number
- CN113914796B CN113914796B CN202111158180.2A CN202111158180A CN113914796B CN 113914796 B CN113914796 B CN 113914796B CN 202111158180 A CN202111158180 A CN 202111158180A CN 113914796 B CN113914796 B CN 113914796B
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- cofferdam
- wellhead
- outer cylinder
- liquid level
- driver
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
Abstract
The invention provides a mud wellhead cofferdam device for drilling and a construction method thereof, wherein the mud wellhead cofferdam device comprises: the cofferdam outer cylinder is vertically arranged around the slurry wellhead and is provided with a first upper opening and a first lower opening, and one side of the cofferdam outer cylinder is also provided with a slurry suction pipe flange; the inner barrel is placed in the drill hole and is provided with a second upper opening and a second lower opening, and the second upper opening of the inner barrel is connected with the first lower opening of the cofferdam outer barrel; the liquid level meter is fixed on the cofferdam outer cylinder and is arranged in the cofferdam and used for measuring the liquid level of wellhead liquid return fluid in the cofferdam; the sand pump, the pump inlet of the sand pump is connected with a pulp suction pipe, the other end of the pulp suction pipe is connected with a pulp suction pipe flange; the driver is electrically connected with the sand pump; and the controller is electrically connected with the driver and the liquid level meter. According to the mud wellhead cofferdam device, the rotating speed of the sand pump is automatically adjusted according to the change of the mud liquid level in the cofferdam, and the balance of the suction and the reflux of mud in the cofferdam is effectively ensured.
Description
Technical Field
The invention relates to the technical field of mud wellhead cofferdam devices for drilling, in particular to a mud wellhead cofferdam device for drilling and a construction method thereof.
Background
When the hydrologic well is drilled, the liquid in the well can flow out from the wellhead to form overflow in the operations of taking down the drill bit and the drill rod. The traditional operation mode is relatively crude, the mode of slurry discharge such as drilling operation is the floor type, namely discharges the slurry produced by drilling with the drainage groove on the ground, and the slurry discharge mode has the following problems:
firstly, the working environment of operators is poor, the well site environment is also damaged to a certain extent, the pollution is serious, and the physical health of staff is affected.
Secondly, drainage groove's discharge efficiency is not high, leads to the problem such as overflow of well head anti-liquid fluid easily.
Disclosure of Invention
The invention provides a slurry wellhead cofferdam device for drilling and a construction method thereof, which are used for solving the technical problems of low discharge efficiency and serious pollution caused by overflow of a liquid return fluid in the existing slurry discharge mode.
In order to solve the above problems, the present invention provides a mud wellhead cofferdam device for drilling, comprising:
the cofferdam outer cylinder is vertically arranged around the slurry wellhead and is provided with a first upper opening and a first lower opening, and one side of the cofferdam outer cylinder is provided with a slurry suction pipe flange;
the inner barrel is placed in the drill hole and is provided with a second upper opening and a second lower opening, and the second upper opening of the inner barrel is connected with the first lower opening of the cofferdam outer barrel;
the liquid level meter is fixed on the cofferdam outer cylinder and is arranged in the cofferdam and used for measuring the liquid level of wellhead liquid return fluid in the cofferdam;
the sand and stone pump is characterized in that a pump inlet of the sand and stone pump is connected with a pulp suction pipe, and the other end of the pulp suction pipe is connected with a pulp suction pipe flange;
the driver is electrically connected with the sand pump;
a controller electrically connected with the driver and the liquid level meter,
the driver and the controller automatically adjust the rotating speed of the sand pump according to the liquid level of wellhead anti-liquid fluid in the cofferdam measured by the liquid level meter so as to keep suction and reverse flow balance.
Further, the cofferdam further comprises a gasket, and the gasket is arranged between the first lower opening of the cofferdam outer cylinder and the second upper opening of the inner cylinder.
Further, the bottom of the cofferdam outer cylinder is of a curved arc structure.
Further, the controller includes:
a transmitting module for transmitting an instruction to the driver;
the control module is used for controlling the operation of the driver;
the storage module is used for storing instruction information;
and the receiving module is used for receiving signals of the liquid level meter and the driver.
Further, the sand pump is a high-suction variable-frequency speed-regulating sand pump.
Further, the inner diameter of the cofferdam outer cylinder is larger than the outer diameter of the inner cylinder.
Further, the gasket is made of a flexible material.
The invention also provides a construction method of the drilling mud wellhead cofferdam device, which comprises the following steps:
S 1 : assembling and processing to form a slurry wellhead cofferdam device for drilling, and integrally conveying the slurry wellhead cofferdam device to the vicinity of a slurry wellhead;
S 2 : the inner cylinder is arranged in the drill hole and is connected to the bottom of the cofferdam outer cylinder through a gasket thread, and the cofferdam outer cylinder is arranged on the ground;
S 3 : the liquid level meter is fixed on the cofferdam outer cylinder through bolts, and the liquid level height in the cofferdam is measured in real time;
S 4 : the controller and the driver automatically adjust the rotating speed of the sand pump according to the liquid level height condition in the cofferdam;
S 5 : ensuring the balance of suction and reflux in the cofferdam.
Compared with the prior art, the invention has remarkable advantages and beneficial effects, and is specifically embodied in the following aspects:
1. the cofferdam is adopted to replace the floor type slurry discharging, so that the working environment of operators is optimized, and meanwhile, the well site environment is also protected; the cofferdam is sealed well, and mud cannot leak to influence the environment; a liquid level meter is arranged in the cofferdam, the liquid level in the cofferdam is detected in real time, and the rotating speed of the sand and stone pump is automatically adjusted through a controller and a driver, so that the wellhead slurry-reversing amount and the pumping amount of the sand and stone pump are kept balanced, and the slurry pumping efficiency in the cofferdam is ensured; is convenient to install and clean in different working environments.
Drawings
FIG. 1 is a schematic view of the overall structure of a mud wellhead cofferdam apparatus for drilling in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of a controller according to an embodiment of the present invention;
fig. 3 is a flow chart of a method of constructing a mud wellhead cofferdam assembly for drilling in accordance with an embodiment of the present invention.
Reference numerals:
1-a cofferdam outer cylinder; 2-a liquid level gauge; 3-washers; 4-an inner cylinder; 5-a slurry suction pipe flange; 6-sand pump; 7-a slurry suction pipe; 8-a driver; 9-a controller; 91-a transmitting module; 92-a control module; 93-a memory module; 94-a receiving module.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
As shown in fig. 1-2, the present embodiment provides a drilling mud wellhead cofferdam device for green investigation of wellhead cofferdam of vehicle-mounted hydrologic well drilling mud intelligent purification and deployment system, the mud wellhead cofferdam device includes: a cofferdam outer cylinder 1, a liquid level meter 2, a gasket 3, an inner cylinder 4, a slurry suction pipe flange 5, a sand and stone pump 6, a slurry suction pipe 7, a driver 8 and a controller 9,
the cofferdam outer cylinder 1 is vertically arranged around a mud wellhead, the cofferdam outer cylinder 1 is provided with a first upper opening and a first lower opening, and one side of the cofferdam outer cylinder 1 is also provided with a slurry suction pipe flange 5 for discharging overflowed mud outwards;
the inner cylinder 4 is placed inside the drill hole and clings to the inner wall of the drill hole, the inner cylinder 4 is provided with a second upper opening and a second lower opening, and the second upper opening of the inner cylinder 4 is connected with the first lower opening of the cofferdam outer cylinder 1.
In this embodiment, the inner tube 4 is a hollow tubular structure, the diameters of the second upper opening and the second lower opening of the inner tube 4 are equal, and are better connected with the cofferdam outer tube 1, an integrated flange plate is arranged on the outer wall of the top end of the inner tube 4, and connecting holes are uniformly formed in the flange plate and are connected to the first lower opening of the cofferdam outer tube 1 through connecting hole screws of the flange plate, so that the inner tube 4 and the cofferdam outer tube 1 are in sealing connection.
Referring to fig. 1, in this embodiment, a liquid level meter 2 is fixed on an outer cylinder 1 of a cofferdam and is disposed inside the cofferdam for measuring the liquid level of a wellhead anti-liquid fluid in the cofferdam. In addition, the liquid level meter 2 is electrically connected with the controller 9, and the advantage of the arrangement is that the liquid level value of wellhead anti-liquid fluid in the cofferdam, which is measured in real time by the liquid level meter 2, can be transmitted to the controller 9, and the controller 9 can make timely control.
Referring to fig. 1, in the present embodiment, a pump inlet of a sand pump 6 is connected to a slurry suction pipe 7, and the other end of the slurry suction pipe 7 is connected to a slurry suction pipe flange 5.
Thus, the suction pipe flange 5 can be fixedly connected with an external suction pipe 7, and the suction pipe 7 is connected with the sand pump 6. In this way, the reverse fluid at the wellhead in the cofferdam can be pumped out by pumping the sand pump 6.
In addition, the driver 8 is electrically connected with the sand pump 6, the controller 9 is electrically connected with the driver 8 and the liquid level meter 2, and the driver 8 and the controller 9 measure the liquid level of wellhead anti-liquid fluid in the cofferdam according to the liquid level meter 2 and automatically adjust the rotating speed of the sand pump 6 so as to keep suction and reverse flow balance.
Therefore, the cofferdam is adopted to replace the floor type slurry discharging, so that the working environment of operators is optimized, and meanwhile, the well site environment is also protected; the cofferdam is sealed well, and mud cannot leak to influence the environment; a liquid level meter is arranged in the cofferdam, the liquid level in the cofferdam is detected in real time, and the rotating speed of the sand and stone pump is automatically adjusted through a controller and a driver, so that the wellhead slurry-reversing amount and the pumping amount of the sand and stone pump are kept balanced, and the slurry pumping efficiency in the cofferdam is ensured; is convenient to install and clean in different working environments.
Specifically, referring to fig. 1, in the embodiment of the present invention, a gasket 3 is further included, and the gasket 3 is disposed between the first lower opening of the cofferdam outer cylinder 1 and the second upper opening of the inner cylinder 4.
In this embodiment, the gasket 3 is made of a flexible material, so as to facilitate sealing and prevent the overflow of the liquid-repellent fluid. The cofferdam outer cylinder 1 and the inner cylinder 4 are connected through a gasket 3 and a bolt; the slurry suction pipe 7 is connected with the sand pump 6 through the slurry suction pipe flange 5. The whole system is convenient to install, good in sealing, capable of preventing leakage and well protecting construction environment of a well site.
Specifically, in the embodiment of the present invention, the bottom of the cofferdam outer cylinder 1 is provided in a curved circular arc structure.
Therefore, the bottom of the cofferdam outer cylinder 1 adopts a curved arc-shaped structure, which is beneficial to chip removal work in the working process, and simultaneously, the cofferdam is convenient to clean.
Specifically, referring to fig. 2, in the embodiment of the present invention, the controller 9 includes:
a transmission module 91 for transmitting instructions to the driver 8;
a control module 92 for controlling the operation of the driver 8;
a memory module 93 for storing instruction information
A receiving module 94 for receiving signals of the level gauge 2 and the driver 8.
Specifically, in the embodiment of the present invention, the sand pump 6 is a high-suction variable-frequency speed-regulating sand pump.
Thus, by means of the sand pump 6 for providing power for discharging wellhead reverse flow liquid, the sand pump 6 preferably employs a high suction variable frequency speed type sand pump which can balance wellhead reverse slurry volume with suction volume of the sand pump 6.
In addition, the sand pump 6 is of a movable structure, and when the sand pump is not in operation, the sand pump 6 can be placed on a trailer, and when the sand pump is in operation, the sand pump is hung on the ground through a crane.
Specifically, in the embodiment of the present invention, the inner diameter of the cofferdam outer cylinder 1 is larger than the outer diameter of the inner cylinder 4.
In particular, in an embodiment of the invention, the gasket 3 is made of a flexible material.
As shown in fig. 3, an embodiment of the present invention further provides a construction method of a drilling mud wellhead cofferdam apparatus, the construction method comprising the steps of:
S 1 : assembling and processing to form a slurry wellhead cofferdam device for drilling, and integrally conveying the slurry wellhead cofferdam device to the vicinity of a slurry wellhead;
S 2 : the inner cylinder 4 is arranged in a drilling hole and is connected to the bottom of the cofferdam outer cylinder 1 through a gasket 3 in a threaded manner, and the cofferdam outer cylinder 1 is arranged on the ground;
S 3 : the liquid level meter 2 is fixed on the cofferdam outer cylinder 1 through bolts, and the liquid level height in the cofferdam is measured in real time;
in this embodiment, the liquid level meter 2 is used for measuring the liquid level of the wellhead anti-liquid fluid in the cofferdam, and automatically adjusts the rotation speed of the wellhead sand pump according to the change of the slurry liquid level in the cofferdam, so as to ensure the balance of suction and reverse flow in the cofferdam.
S 4 : the controller 9 and the driver 8 automatically adjust the rotating speed of the sand pump 6 according to the liquid level height condition in the cofferdam;
S 5 : ensuring the balance of suction and reflux in the cofferdam.
Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the invention.
Claims (4)
1. The utility model provides a mud wellhead cofferdam device for drilling for among green investigation on-vehicle hydrologic well drilling mud intelligence purifies and allotment system's wellhead cofferdam, its characterized in that includes:
the cofferdam outer cylinder (1) is vertically arranged around a mud wellhead, the cofferdam outer cylinder (1) is provided with a first upper opening and a first lower opening, and one side of the cofferdam outer cylinder (1) is also provided with a slurry suction pipe flange (5);
the bottom of the cofferdam outer cylinder (1) is provided with a curved arc structure;
the inner cylinder (4) is placed in the drill hole, the inner cylinder (4) is provided with a second upper opening and a second lower opening, and the second upper opening of the inner cylinder (4) is connected with the first lower opening of the cofferdam outer cylinder (1);
the inner diameter of the cofferdam outer cylinder (1) is larger than the outer diameter of the inner cylinder (4);
a gasket (3) arranged between a first lower opening of the cofferdam outer cylinder (1) and a second upper opening of the inner cylinder (4);
the liquid level meter (2) is fixed on the cofferdam outer cylinder (1) and is arranged in the cofferdam and used for measuring the liquid level of wellhead liquid return fluid in the cofferdam;
the sand pump (6), the pump inlet of the sand pump (6) is connected with the pulp suction pipe (7), and the other end of the pulp suction pipe (7) is connected with the pulp suction pipe flange (5);
the sand pump (6) is a high-suction variable-frequency speed-regulating sand pump;
the driver (8) is electrically connected with the sand pump (6);
a controller (9) electrically connected with the driver (8) and the liquid level meter (2),
the driver (8) and the controller (9) measure the liquid level of wellhead anti-liquid fluid in the cofferdam according to the liquid level meter (2), and automatically adjust the rotating speed of the sand pump (6) so as to keep the balance of suction and reverse flow.
2. Drilling mud wellhead cofferdam assembly according to claim 1, characterized in that the controller (9) comprises:
-a transmission module (91) for transmitting instructions to the driver (8);
-a control module (92) for controlling the operation of the driver (8);
a storage module (93) for storing instruction information;
-a receiving module (94) for receiving signals of the level gauge (2) and the driver (8).
3. Drilling mud wellhead cofferdam assembly according to claim 1, characterized in that the gasket (3) is made of flexible material.
4. A method of constructing a drilling mud wellhead cofferdam assembly as claimed in any one of claims 1 to 3, wherein said method of construction comprises the steps of:
S 1 : assembling and processing to form a slurry wellhead cofferdam device for drilling, and integrally conveying the slurry wellhead cofferdam device to the vicinity of a slurry wellhead;
S 2 : the inner cylinder (4) is arranged in a drill hole and is connected to the bottom of the cofferdam outer cylinder (1) through a gasket (3) in a threaded manner, and the cofferdam outer cylinder (1) is arranged on the ground;
S 3 : the liquid level meter (2) is fixed on the cofferdam outer cylinder (1) through bolts, and the liquid level height in the cofferdam is measured in real time;
S 4 : the controller (9) and the driver (8) automatically adjust the rotating speed of the sand pump (6) according to the liquid level height condition in the cofferdam;
S 5 : ensuring the balance of suction and reflux in the cofferdam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111158180.2A CN113914796B (en) | 2021-09-30 | 2021-09-30 | Drilling mud wellhead cofferdam device and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111158180.2A CN113914796B (en) | 2021-09-30 | 2021-09-30 | Drilling mud wellhead cofferdam device and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113914796A CN113914796A (en) | 2022-01-11 |
| CN113914796B true CN113914796B (en) | 2023-05-26 |
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| CN202111158180.2A Active CN113914796B (en) | 2021-09-30 | 2021-09-30 | Drilling mud wellhead cofferdam device and construction method thereof |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8127837B1 (en) * | 2007-05-02 | 2012-03-06 | James Anthony Rose | Sealed well cellar |
| CN201705271U (en) * | 2010-06-21 | 2011-01-12 | 中国石油天然气股份有限公司 | Wellhead diversion device used in sucker rod work |
| CN202990938U (en) * | 2012-12-27 | 2013-06-12 | 中国石油化工股份有限公司 | Adjustable horn-shape spill-proof opening |
| CN206722794U (en) * | 2017-03-20 | 2017-12-08 | 江苏扬州合力橡胶制品有限公司 | Wellhead slurry reflux |
| CN107288620B (en) * | 2017-08-24 | 2023-06-06 | 重庆科技学院 | Intelligent detection device for liquid level of oil drilling well head anti-overflow pipe drilling fluid |
| CN110924882A (en) * | 2019-12-31 | 2020-03-27 | 中国石油大学胜利学院 | Seabed wellhead assembly |
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