CN214007100U - Pneumatic self-lifting degassing device - Google Patents
Pneumatic self-lifting degassing device Download PDFInfo
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- CN214007100U CN214007100U CN202022926994.3U CN202022926994U CN214007100U CN 214007100 U CN214007100 U CN 214007100U CN 202022926994 U CN202022926994 U CN 202022926994U CN 214007100 U CN214007100 U CN 214007100U
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Abstract
The utility model relates to a pneumatic self-lifting degasser contains: the drilling fluid drilling device comprises a degasser, a liquid level detection device, a lifting device, an air source and a pneumatic pilot valve, wherein the degasser is immersed in the drilling fluid; the liquid level detection device is arranged on the degasser and is close to the liquid level of the drilling fluid; the lifting device is connected with the degasser; the pneumatic pilot valve is respectively connected with the lifting device, the liquid level detection device, the air source and the external atmosphere; the liquid level detection device is connected with an air source. When the liquid level of the drilling fluid is higher than the bottom of the liquid level detection device, the liquid level detection device and the drilling fluid form a closed container, the pressure inside the liquid level detection device is increased by the accumulation of gas entering from a gas source, the pneumatic pilot valve is pushed to be opened, the lifting device is driven to drive the degasser to ascend, when the liquid level of the drilling fluid is lower than the liquid level detection device, the gas entering from the gas source is directly emptied from the bottom of the liquid level detection device, the pneumatic pilot valve is closed, the lifting device is driven to drive the degasser to descend, and therefore the depth of the degasser immersed in the drilling fluid is kept unchanged.
Description
Technical Field
The utility model relates to a technical field of oil drilling on-spot geological logging engineering, in particular to degasser specifically indicates a can be according to the undulant pneumatic from going up and down degasser in order to maintain the invariable of degasification volume of drilling fluid liquid level automatically regulated lift.
Background
Gas logging is one of the cores of oil and gas exploration logging, and degassing treatment and sampling of drilling fluid are essential pretreatment processes of gas logging. The accuracy and reliability of oil and gas evaluation can be improved by improving the quantification level of degassing sampling of the drilling fluid.
The conventional drilling fluid degassing device is directly and fixedly arranged in the drilling fluid and is very easily influenced by the fluctuation of the liquid level of the drilling fluid, so that the treatment capacity of the drilling fluid in unit time cannot be constant, and the subsequent gas measurement judgment is influenced.
In addition, the commonly adopted hose pump quantitative degasser has high cost and small drilling fluid treatment capacity; the float lifting and passive pressure detection degasser is easily affected by the adhesion and deposition of slurry, and needs to be cleaned frequently.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an active pneumatics is from elevating degasser can realize the degasser along with the undulant dynamic adjustment of well drilling liquid level height, reaches quantitative degasification's purpose, and simple structure is light, and the reliability is high.
In order to achieve the above object, the present invention provides a pneumatic self-lifting degassing device, comprising:
a degasser at least partially immersed in the drilling fluid;
the liquid level detection device is arranged on the degasser, and the bottom of the liquid level detection device is open and is close to the liquid level of the drilling fluid;
the lifting device is connected with the degasser and used for driving the degasser to lift;
a gas source;
the pneumatic pilot valve is respectively connected with the lifting device, the liquid level detection device, the air source and the external atmosphere through different pipelines; the air source enters the liquid level detection device after being subjected to air resistance and flow stabilization;
when the liquid level of drilling fluid is higher than the bottom of the liquid level detection device, the bottom of the liquid level detection device is sealed by the drilling fluid, so that a closed container is formed inside the liquid level detection device, gas entering the closed container from a gas source accumulates, the pressure in the closed container in the liquid level detection device is increased, a pneumatic pilot valve is pushed through a pipeline, the pneumatic pilot valve is opened, a lifting device is driven to drive a degasser to ascend, the depth of the degasser immersed in the drilling fluid is unchanged, and the degassing amount is kept constant;
when the liquid level of the drilling fluid is lower than the bottom of the liquid level detection device, gas entering from a gas source is directly discharged from the bottom of the liquid level detection device, so that the pressure in the liquid level detection device is reduced, the pneumatic pilot valve is closed, the lifting device is driven to drive the degasser to descend, the depth of the degasser immersed in the drilling fluid is unchanged, and the degassing amount is kept constant.
In a preferred embodiment of the present invention, the liquid level detecting device is installed on the degasser in an up-down adjustable manner.
In a preferred embodiment of the present invention, the pneumatic self-elevating degasser further comprises a mounting bracket fixed on the wellhead, and the elevating device and the pneumatic pilot valve are fixedly mounted on the mounting bracket.
In a preferred embodiment of the present invention, the liquid level detecting device is a regular cover cylinder.
In a preferred embodiment of the present invention, the pneumatic pilot valve has a pressure source end, a load output end, an emptying end and a pilot end, the pressure source end is communicated with the air source through a pipeline, the load output end is communicated with the lifting device through a pipeline, the emptying end is communicated with the external atmosphere through an air resistance, and the pilot end is communicated with the liquid level detection device through a pipeline; the liquid level detection device is also communicated with an air source through a pipeline and an air resistor;
when the pressure of the pilot end of the pneumatic pilot valve is greater than the starting pressure of the pneumatic pilot valve, the pneumatic pilot valve is opened, so that the air source is communicated with the lifting device, the lifting device is driven by the power provided by the air source to drive the degasser to move upwards, the height of the degasser rises along with the rise of the liquid level of well drilling liquid, the depth of the degasser immersed in the well drilling liquid is ensured to be unchanged, and the degassing amount is kept constant.
When the pressure of the pilot end of the pneumatic pilot valve is smaller than the starting pressure of the pneumatic pilot valve, the pneumatic pilot valve is closed, so that the lifting device is communicated with the emptying end, the pressure in the lifting device is released, the degasser is driven to move downwards, the height of the degasser is reduced along with the reduction of the liquid level of drilling fluid, the fact that the degasser is immersed in the drilling fluid to a constant depth is ensured, and the degassing amount is kept constant.
In a preferred embodiment of the present invention, the starting pressure of the pneumatic pilot valve is less than or equal to 1 bar.
In a preferred embodiment of the present invention, the gas source is a compressed steel cylinder or an air compressor, and the gas source is provided with a gas pressure reducing component and/or a gas filtering component.
Pneumatic self-lifting degasser, simple structure is light, the reliability is high, through the height position of automatically regulated degasser, make it remain unanimous with the drilling fluid liquid level all the time to guarantee that the handling capacity of drilling fluid is invariable all the time, reach quantitative degasification's purpose. The utility model discloses effectively promote the quantitative level of drilling fluid gas pretreatment, explain the evaluation for subsequent gas logging and oil gas and provide powerful preceding stage technical guarantee support.
The utility model discloses need not any electrical control equipment, under the explosion-proof site operation of needs, need not additionally set up automatically controlled explosion-proof measure, greatly saved space and weight, make things convenient for on-the-spot installation and maintenance.
The utility model provides an active pneumatics is from going up and down degasser can be undulant according to the drilling fluid liquid level, adjusts degasser's lift by oneself to can effectively solve shortcoming and the restriction that exists among the prior art.
Drawings
FIG. 1 is a schematic diagram of the pneumatic self-elevating degasser of the present invention when the drilling fluid level rises;
fig. 2 is a schematic diagram of the pneumatic self-lifting degasser of the present invention when the drilling fluid level is lowered.
Detailed Description
The technical content, the constructional features, the achieved objects and the effects of the invention will be described in detail by the preferred embodiments in the following with reference to fig. 1 and 2.
As shown in fig. 1 and 2, the pneumatic self-lifting degassing device provided by the present invention comprises: the device comprises a degasser 1, a liquid level detection device 2, a lifting device 3, an air source 4, a pneumatic pilot valve 5 and a mounting bracket 6.
The lower part of the degasser 1 is at least partially immersed in the drilling fluid 7; the liquid level detection device 2 can be adjusted up and down on the degasser 1. As to what means of up-and-down adjustment is used, it is possible for a person skilled in the art to do so without any inventive effort.
Liquid level detection device 2 the liquid level detection device 2 is a mantle cylinder of regular shape, the bottom of which is open and is close to the liquid level 7a of the drilling fluid 7. The material of the liquid level detection device 2 is not limited, and is generally made of a strong and corrosion-resistant material such as stainless steel or iron. The level detection device 2 is preferably a cylindrical mantle made of stainless steel.
The installing support 6 is fixed on a wellhead 8 by adopting a clamp 6b, and the lifting device 3 and the pneumatic pilot valve 5 are installed on the installing support 6, so that a firm field installation environment is provided for the self-lifting degasser.
The lifting device 3 is formed by linkage of pneumatic driving elements such as pneumatic tendons and mechanical structures, and is driven by pressure gas to contract and lift. Corresponding pulleys 6a are provided on the mounting bracket 6, the deaerator 1 is connected to the lifting device 3 by a pulling rope 9 passing around these pulleys 6a, and the lifting device 3 drives the deaerator 1 to move up and down by the pulling rope 9.
The degasser 1 is a gas degassing treatment device conventionally used in a gas logging field in the prior art, and is powered by an explosion-proof motor or an explosion-proof pneumatic motor.
The gas source 4 provides aerodynamic force for the integrated self-lifting degasser, and can be preferably realized by a compression steel cylinder, an air compressor and the like. The gas source 4 is provided with a gas pressure reducing means and/or a gas filtering means, and the gas supplied to the lifting/lowering degasifier is preliminarily reduced in pressure and filtered.
The pneumatic pilot valve 5 is provided with a pressure source end 5a, a load output end 5b, an emptying end 5c and a pilot end 5d, wherein the pressure source end 5a is communicated with the air source 4 through a pipeline 10, the load output end 5b is communicated with the lifting device 3 through a pipeline 11, the emptying end 5c is communicated with the external atmosphere through an air resistor (not shown in the figure), and the pilot end 5d is communicated with the liquid level detection device 2 through a pipeline 12; the air inlet 21 at the upper part of the liquid level detection device 2 is also communicated with the air source 4 through a pipeline 13 and an air resistor (not shown in the figure) to control the output flow of the air source 4 and make the air source 4 enter the liquid level detection device 2 after being stabilized by the air resistor.
The utility model discloses a theory of operation is: degasser 1 is made to rise when level detection device 2 supplies gas under pressure, degasser 1 is made to fall when level detection device 2 releases (deflates) gas under pressure, specifically:
as shown in fig. 1, when the liquid level 7a of the drilling fluid 7 is higher than the bottom of the liquid level detection device 2, the bottom of the liquid level detection device 2 is sealed by the drilling fluid 7, so that a closed container is formed inside the liquid level detection device 2, the gas entering the closed container from the gas source 4 accumulates to increase the pressure in the closed container, the pneumatic pilot valve 5 is pushed through the pipeline 12, the pneumatic pilot valve 5 is opened, the lifting device 3 is driven to drive the degasser 1 to ascend through the traction rope 9, the depth of the degasser 1 immersed in the drilling fluid 7 is unchanged, and the degassing amount is maintained to be constant;
as shown in fig. 2, when the liquid level 7a of the drilling fluid 7 is lower than the liquid level detection device 2, the gas entering the liquid level detection device 2 from the gas source 4 is directly discharged from the bottom of the liquid level detection device 2, the pneumatic pilot valve 5 is closed, the lifting device 3 is driven to drive the degasser 1 to descend through the traction rope 9, the depth of the degasser 1 immersed in the drilling fluid is unchanged, and the degassing amount is kept constant.
In the preferred embodiment of the present invention, when the liquid level 7a of the drilling fluid 7 rises and submerges the bottom of the liquid level detecting device 2, as shown in fig. 1, the gas provided by the gas source 4 enters the liquid level detecting device 2 through the gas barrier and accumulates in the liquid level detecting device 2, thereby increasing the internal pressure of the liquid level detecting device 2. When the internal pressure of the liquid level detection device 2 is greater than the pilot pneumatic pressure of the pneumatic pilot valve 5, generally greater than or equal to 1bar, the pneumatic pilot valve 5 is opened, the gas source 4 is communicated with the lifting device 3 through the pipeline 10, the pneumatic pilot valve 5 and the pipeline 11, the lifting device 3 drives the degasser 1 to move upwards through the traction rope 9, so that the height of the degasser 1 rises along with the rise of the liquid level of drilling fluid, the depth of the degasser 1 immersed in the drilling fluid is ensured to be unchanged, and the constant degassing amount is maintained.
Further, an air resistor is arranged between the liquid level detection device 2 and the air source 4, the flow rate can be adjusted and controlled, the response speed of the liquid level detection device 2 can be adjusted by adjusting the size of the air resistor, and the pilot flow supply of the pneumatic pilot valve 5 is ensured.
When the liquid level 7a of the drilling fluid 7 drops and the bottom of the liquid level detection device 2 is completely exposed to the liquid level 7a, the gas of the gas source 4 enters the liquid level detection device 2 through the pipeline 13 and the air lock, and is discharged to the atmosphere from the bottom of the liquid level detection device 2, as shown in fig. 2. At this time, the pressure of the pilot end 5d of the pneumatic pilot valve 5 is smaller than the pneumatic pressure, generally smaller than 1bar, the pneumatic pilot valve 5 is closed, the lifting device 3 is communicated with the emptying end 5c of the pneumatic pilot valve 5 through the pipeline 11, the pressure gas in the lifting device 3 is released, the degasser 1 is driven to move downwards through the traction rope 9, the height of the degasser 1 is reduced along with the reduction of the liquid level of the drilling fluid 7, the depth of the degasser immersed in the drilling fluid is ensured to be unchanged, and the degassing amount is maintained to be constant.
Subsequently, when the degasser 1 is lowered and brings the bottom of the liquid level detection device 2 to be immersed in the drilling fluid 7 again, the above process is repeated. Thus, the pneumatic self-elevating degasser is always in the dynamic equilibrium process of fig. 1 and 2. The response speed of self-lifting can be actively adjusted by adjusting the air resistance of the air source 4 entering the liquid level detection device 2.
And, pneumatic self-lifting degasser, be the closed loop design that an active pressure detection was carried out, directly to 2 air supplies of liquid level detection device through air supply 4, in case 2 bottoms submergings of liquid level detection device are in drilling fluid 7, pneumatic pilot valve 5's execution mainly receives air supply rate influence of air supply 4, even the siltation mud arouses inside volume change in the liquid level detection device 2, can not influence the operation of whole system yet.
According to the actual working condition requirement on site, the height of the liquid level detection device 2 relative to the deaerator 1 can be adjusted, so that the flow rate of the drilling fluid processed by the deaerator 1 in unit time can be changed.
To sum up, pneumatic from lift degasser, simple structure is light, the reliability is high, has adopted brand-new quantitative degasification mode, through the height position of automatically regulated degasser, make it keep unanimous with the drilling fluid liquid level all the time (the relative altitude of degasser and drilling fluid keeps invariable promptly) to guarantee that the handling capacity of drilling fluid is invariable all the time, reach the purpose of quantitative degasification, and can realize the quantitative sampling degasification with the large-traffic drilling fluid that conventional degasser is the same.
The utility model discloses effectively promote the quantitative level of drilling fluid gas pretreatment, explain the evaluation for subsequent gas logging and oil gas and provide powerful preceding stage technical guarantee support.
While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (7)
1. A pneumatic self-elevating degasser, comprising:
a degasser at least partially immersed in the drilling fluid;
the liquid level detection device is arranged on the degasser, and the bottom of the liquid level detection device is open and is close to the liquid level of the drilling fluid;
the lifting device is connected with the degasser and used for driving the degasser to lift;
a gas source;
the pneumatic pilot valve is respectively connected with the lifting device, the liquid level detection device, the air source and the external atmosphere through different pipelines; the air source enters the liquid level detection device after being subjected to air resistance and flow stabilization;
when the liquid level of drilling fluid is higher than the bottom of the liquid level detection device, the bottom of the liquid level detection device is sealed by the drilling fluid, so that a closed container is formed inside the liquid level detection device, gas entering the closed container from a gas source accumulates, the pressure in the closed container in the liquid level detection device is increased, a pneumatic pilot valve is pushed through a pipeline, the pneumatic pilot valve is opened, a lifting device is driven to drive a degasser to ascend, the depth of the degasser immersed in the drilling fluid is unchanged, and the degassing amount is kept constant;
when the liquid level of the drilling fluid is lower than the bottom of the liquid level detection device, gas entering from a gas source is directly discharged from the bottom of the liquid level detection device, so that the pressure in the liquid level detection device is reduced, the pneumatic pilot valve is closed, the lifting device is driven to drive the degasser to descend, the depth of the degasser immersed in the drilling fluid is unchanged, and the degassing amount is kept constant.
2. The pneumatic self-elevating degasser of claim 1, wherein said level sensing means is mounted on said degasser in an up and down adjustable manner.
3. The pneumatic self-elevating degasser of claim 1 further comprising a mounting bracket fixed to the wellhead, wherein said elevating means and pneumatic pilot valve are fixedly mounted to said mounting bracket.
4. The pneumatic self-lifting degassing device according to claim 1, wherein said liquid level detection means is a regular shaped hood.
5. The pneumatic self-lifting degassing device according to claim 1, wherein the pneumatic pilot valve has a pressure source end, a load output end, a relief end and a pilot end, the pressure source end is communicated with a gas source through a pipeline, the load output end is communicated with the lifting device through a pipeline, the relief end is communicated with the external atmosphere through a gas barrier, and the pilot end is communicated with the liquid level detection device through a pipeline; the liquid level detection device is also communicated with an air source through a pipeline and an air resistor;
when the pressure of the pilot end of the pneumatic pilot valve is greater than the starting pressure of the pneumatic pilot valve, the pneumatic pilot valve is opened, so that the gas source is communicated with the lifting device, the lifting device is driven by the power provided by the gas source to drive the degasser to move upwards, the height of the degasser rises along with the rise of the liquid level of well drilling liquid, the depth of the degasser immersed in the drilling liquid is ensured to be unchanged, and the degassing amount is kept constant;
when the pressure of the pilot end of the pneumatic pilot valve is smaller than the starting pressure of the pneumatic pilot valve, the pneumatic pilot valve is closed, so that the lifting device is communicated with the emptying end, the pressure in the lifting device is released, the degasser is driven to move downwards, the height of the degasser is reduced along with the reduction of the liquid level of drilling fluid, the fact that the degasser is immersed in the drilling fluid to a constant depth is ensured, and the degassing amount is kept constant.
6. The pneumatic self-lifting degasser of claim 4, wherein said pneumatic pilot valve has a starting pressure of 1bar or less.
7. The pneumatic self-lifting degassing device according to claim 1, wherein said gas source is a compressed steel cylinder or an air compressor, and said gas source is provided with a gas pressure reducing member and/or a gas filtering member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022926994.3U CN214007100U (en) | 2020-12-09 | 2020-12-09 | Pneumatic self-lifting degassing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022926994.3U CN214007100U (en) | 2020-12-09 | 2020-12-09 | Pneumatic self-lifting degassing device |
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| CN214007100U true CN214007100U (en) | 2021-08-20 |
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| CN202022926994.3U Active CN214007100U (en) | 2020-12-09 | 2020-12-09 | Pneumatic self-lifting degassing device |
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