CN215102433U - Compact modular oil-water efficient separation equipment for offshore well workover flowback - Google Patents
Compact modular oil-water efficient separation equipment for offshore well workover flowback Download PDFInfo
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- CN215102433U CN215102433U CN202120513513.8U CN202120513513U CN215102433U CN 215102433 U CN215102433 U CN 215102433U CN 202120513513 U CN202120513513 U CN 202120513513U CN 215102433 U CN215102433 U CN 215102433U
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Abstract
The utility model discloses a marine well workover flowback uses compact modular oily water high-efficient splitter, include: the feed inlet of the oil removing device is communicated with oil water; the coagulation reactor is communicated with a discharge port at the bottom of the advection oil removing device; the two-stage air floatation separation devices are mutually connected in series and communicated with the coagulation reactor; the sewage buffer tank is communicated with a water receiving opening at the top of the air floatation separation device; the two first foam scraping devices are respectively and rotatably arranged at the top of the two-stage air floatation separation device; the two dirty oil tanks are respectively arranged on one side of the two-stage air floatation separation device; the dirty oil cache tank is connected with the two dirty oil grooves and the dirty oil discharge port; the two-stage fine filtering devices are connected with the sewage buffer tank in series or in parallel, and a liquid outlet is connected with a water outlet; deoiling device, coagulation reactor all set up in the superstructure of sled body, and two-stage air supporting separator, buffer tank and the meticulous filter equipment setting of two-stage are in the substructure of sled body. The utility model has the characteristics of high adaptability and filterability.
Description
Technical Field
The utility model relates to a processing technology field of oil field operation waste liquid, more specifically, the utility model relates to a marine well workover is flowback and is used high-efficient splitter of compact modularization ability of oil and water.
Background
In the oil field development and oil gas exploitation process, operations such as well drilling and completion, production and completion, well washing and well repairing and the like are indispensable steps in the oil field development and production increasing process. A certain amount of flowback waste liquid is generated in the well repairing process, and harmless resource treatment needs to be carried out on the part of oil-water mixture waste liquid. For offshore oil fields, the platform space is narrow, the field drilling and completion operation is limited by the field, the returned drilling and completion waste liquid cannot be stored and treated in a centralized manner for a long time, and the conventional land oil field mud pit storage and sedimentation centralized treatment mode cannot be applied to the offshore oil fields;
in the field operation process, the flow rate difference of the well repairing flowback waste liquid is large, the flowback is intermittent, the components are complex and the like under different well head and bottom layer conditions; because a large amount of chemical additives are added in the drilling and completion process, chemical components in the flowback waste liquid are very complex, oil-water separation is difficult, and system equipment with a perfect separation treatment process cannot meet the marine operation conditions.
At present, the temporary treatment mode of the offshore platform is that part of sewage temporary separation tanks store simple skimmed oil and then return to a mud pit, and part of liquid is transported to the land as waste liquid for treatment, so that the overall operation efficiency is low, and the treatment cost is high;
in view of the offshore wellhead operation characteristics and the limited conditions of the platform site, the equipment is efficient and modularized, the key of the site waste liquid treatment problem is solved, and the equipment is also a breakthrough for improving the offshore platform wellhead operation efficiency.
SUMMERY OF THE UTILITY MODEL
One purpose of the utility model is to design and develop a compact modular oil-water high-efficiency separation device for offshore well workover flowback, which adopts a double-layer pry body design to control the device at the minimum size; through advection deoiling, air supporting separation and meticulous filtration to the holding nature of waste liquid treatment higher, very high filtration precision.
The utility model provides a technical scheme does:
a compact modular oil-water high-efficiency separation device for offshore well workover flowback, comprising:
the feed inlet of the advection oil removing device is communicated with oil and water; and
the coagulation reactor is communicated with a bottom discharge hole of the advection oil removal device;
the dosing device is connected with the coagulation reactor;
the liquid inlet at the bottom of the first-stage air floatation separation device is communicated with the coagulation reactor;
a liquid inlet at the bottom of the secondary air-flotation separation device is communicated with a water receiving opening at the top of the primary air-flotation separation device;
the sewage buffer tank is communicated with a water receiving port at the top of the secondary air floatation separation device;
the two first foam scraping devices are respectively and rotatably arranged at the tops of the primary air floatation separation device and the secondary air floatation separation device;
the two sewage oil tanks are respectively arranged at one side of the first-stage air floatation separation device and one side of the second-stage air floatation separation device and are used for correspondingly collecting the solid-phase scum separated by the two first scum scraping devices one by one;
a feed inlet of the dirty oil buffer tank is communicated with the two dirty oil tanks, and a discharge outlet of the dirty oil buffer tank is connected with a dirty oil discharge outlet;
the two-stage fine filtering devices are arranged in series or in parallel, the feeding ports of the two-stage fine filtering devices are connected with the sewage buffer tank, and the discharging ports of the two-stage fine filtering devices are connected with the water outlet;
the pry body is of a double-layer structure;
wherein, advection deoiling device, coagulation reactor and charge device all set up in the superstructure of sled body, one-level air supporting separator, second grade air supporting separator, buffer tank and the meticulous filter equipment setting of two-stage are in the substructure of sled body.
Preferably, the method further comprises the following steps:
the liquid inlet of the first lifting pump is arranged in the oil water;
one end of the liquid inlet vertical pipe is connected with a liquid outlet of the first lifting pump, and the other end of the liquid inlet vertical pipe is connected with the advection oil removing device;
a liquid inlet of the second lift pump is connected with a liquid outlet of the sewage cache tank, and a liquid outlet of the second lift pump is connected with the two-stage fine filtering device;
one end of the U-shaped communicating pipe is connected with a bottom discharge hole of the advection oil removing device, and the other end of the U-shaped communicating pipe is connected with the coagulation reactor;
one end of the first self-flow vertical pipe is connected with the coagulation reactor, and the other end of the first self-flow vertical pipe is connected with a bottom liquid inlet of the primary air floatation separation device;
and one end of the second self-flow vertical pipe is connected with the two dirty oil tanks, and the other end of the second self-flow vertical pipe is connected with the dirty oil cache tank.
Preferably, the method further comprises the following steps:
and the second foam scraping device is arranged at the top of the advection oil removing device and is used for recovering the separated crude oil.
Preferably, the dosing device is arranged at the upper part of the coagulation reactor.
Preferably, the dosing device comprises a dosing tank, a metering dosing pump and a blade stirrer.
Preferably, the coagulation reactor has a double-layer paddle stirrer therein.
Preferably, the first-stage air flotation separation device and the second-stage air flotation separation device both adopt mechanical dissolved air flotation pumps, and the pump return flow rate of the mechanical dissolved air flotation pumps is within the range of 30% -60%.
Preferably, the feed inlet of the advection oil removing device, the discharge outlet of the dirty oil buffer tank and the discharge outlet of the two-stage fine filtering device are all connected through a union.
Preferably, the two-stage fine filtering device adopts a two-stage microporous membrane for filtering, and the precision of a filtering filter element of the two-stage microporous membrane can be adjusted according to water quality.
Preferably, the pry body has the following dimensions: l is less than or equal to 6500, W is less than or equal to 2500, and H is less than or equal to 5500;
wherein L is the length, W is the width, and H is the height.
Beneficial effects do:
(1) the compact modular oil-water high-efficiency separation equipment for offshore well workover flowback has high integrated modular degree, adopts double-layer skid-mounted design, meets the load requirement of an offshore platform, simultaneously controls the occupied area to be the minimum size, and can meet the requirement of site field limitation;
(2) the compact modular oil-water efficient separation equipment for offshore well workover flowback integrates a multi-stage treatment process, has higher treatment and accommodation performance on flowback oil-water mixed waste liquid, and has higher oil-containing limit value of feed liquid; the influence of complex components in the waste liquid is effectively relieved through the conditioning effect of various chemical agents, and the separation effect is ensured; the mechanical dissolved air floatation has higher bubble solubility and smaller bubble particle size; the treatment process is flexible, and the filtration precision can be adjusted according to the on-site water quality condition;
(3) the utility model discloses be applicable to the flowback of land oil field well head waste liquid and handle, the lower floor equipment transports alone, and small in size more can adapt to the well head sewage treatment of various different geographical environment and road environment, and it is all nimble convenient with the on-the-spot installation to remove the transportation.
Drawings
FIG. 1 is the utility model discloses a marine well workover flowback is with compact modular oily water high-efficient splitter's structural schematic.
FIG. 2 is the utility model discloses the marine well workover is flowback with compact modular oily water high-efficient splitter's structural connection schematic diagram.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
As shown in fig. 1 and fig. 2, the utility model provides a marine well workover flowback uses high-efficient splitter of compact modularization oily water, include: the system comprises an advection degreasing device 110, a coagulation reactor 120, a dosing device 160, a first-stage air flotation separation device 131, a second-stage air flotation separation device 132, a buffer tank 140, a two-stage fine filtering device 150 and a pry body, wherein a feed inlet of the advection degreasing device 110 is communicated with oil and water through an oil and water inlet 210, and the advection degreasing device 110 is used for removing floating oil and dispersed oil in a medium; the bottom feed inlet of the coagulation reactor 120 is communicated with the bottom discharge outlet of the advection oil removing device 110 through a U-shaped communicating pipe; the dosing device 160 is connected with the coagulation reactor 120, the dosing device 160 is arranged at the upper part of the coagulation reactor 120, and the dosing device 160 comprises a dosing tank, a metering dosing pump and a blade type stirrer to realize continuous dosing; the coagulation reactor 120 is communicated with a liquid inlet at the bottom of the primary air floatation separation device 131 through a first gravity flow vertical pipe 182; a liquid inlet at the bottom of the secondary air-flotation separation device 132 is communicated with a water receiving opening at the top of the primary air-flotation separation device 131; the buffer tank 140 is connected to the second-stage air flotation separation device 132, and the two-stage fine filtration device 150 is connected to the buffer tank 140, and is configured to remove residual trace suspended impurities from the water; the pry body comprises an upper layer structure 191 and a lower layer structure 192, the advection oil removing device 110, the coagulation reactor 120 and the dosing device 160 are all arranged in the upper layer structure 191, and the first-level air flotation separation device 131, the second-level air flotation separation device 132, the buffer tank 140 and the two-level fine filtering device 150 are arranged in the lower layer structure 192.
As shown in fig. 2, a rotatable second froth scraping device 111 is disposed on the advection oil removing device 110 for recovering the separated crude oil; the first-stage air flotation separation device 131 and the second-stage air flotation separation device 132 are respectively provided with a rotatable first froth scraping device 133 and a rotatable second froth scraping device 134, and are used for collecting solid-phase scum separated by air flotation; a first oil-sewage tank 135 is arranged on one side of the top of the primary air-flotation separation device 131, and a second oil-sewage tank 136 is arranged on one side of the top of the secondary air-flotation separation device 132, and is used for correspondingly collecting the solid-phase scum separated by the two first scum scraping devices 133 and 134 one by one;
as shown in fig. 2, the buffer tank 140 includes: a sewage buffer tank 141 and a dirty oil buffer tank 142, wherein the sewage buffer tank 141 is communicated with a water receiving opening at the top of the secondary air flotation separation device 132; the first dirty oil groove 135 and the second dirty oil groove 136 are communicated with a feeding port of the dirty oil buffer tank 142 through a second self-flow vertical pipe 183, and a discharging port of the dirty oil buffer tank 142 is connected with a dirty oil outlet 230.
As shown in fig. 2, the compact modular oil-water high-efficiency separation equipment for offshore well workover flowback further comprises: the system comprises a first lift pump 171, a second lift pump 172 and a sump oil pump 173, wherein the first lift pump 171, the second lift pump 172 and the sump oil pump 173 are all arranged in the lower layer structure 192, a liquid inlet of the first lift pump 171 is connected with an oil-water liquid inlet 210, and a liquid outlet of the first lift pump 171 is connected with the advection oil removing device 110 through a liquid inlet vertical pipe 181; a liquid inlet of the second lift pump 172 is connected with a liquid outlet of the sewage buffer tank 141, and a liquid outlet of the second lift pump 172 is connected with the two-stage fine filtering device 150; a liquid inlet of the dirty oil pump 173 is connected to the dirty oil buffer tank 142, and a liquid outlet of the dirty oil pump 173 is connected to the dirty oil outlet 230.
As shown in fig. 2, the two-stage fine filtering devices 150 are arranged in series or in parallel, the feed inlets of the two-stage fine filtering devices 150 are connected to the sewage buffer tank 141, and the discharge outlets of the two-stage fine filtering devices 150 are connected to the water outlet 220.
As shown in fig. 2, the coagulation reactor 120 has a double-layer paddle type stirrer, which can continuously stir the coagulation reaction to coalesce impurities such as oil droplets and suspended substances in water.
In this embodiment, the first-stage air flotation separation device 131 and the second-stage air flotation separation device 132 both use mechanical dissolved air floating pumps, and the pump return flow rate of the mechanical dissolved air floating pumps ranges from 30% to 60%; the two-stage fine filtering device 150 adopts a two-stage microporous membrane for filtering, and the precision of a filtering core of the two-stage microporous membrane can be adjusted according to water quality.
In this embodiment, the feed inlet of the advection oil removing device 110, the discharge outlet of the dirty oil buffer tank 142, and the discharge outlet of the two-stage fine filtering device 150 are all connected by a union.
In this embodiment, the size of the pry body is: l is less than or equal to 6500, W is less than or equal to 2500, and H is less than or equal to 5500, wherein L is the length, W is the width, and H is the height.
The utility model discloses a work flow does: the oil-water waste liquid is pumped into the advection deoiling device 110 through the first lift pump 171 for removing floating oil and dispersed oil in the medium, and the separated crude oil is recovered in the advection deoiling device 110 through the second foam scraping device 111; the waste liquid after primary oil removal is conveyed into the coagulation reactor 120 through the U-shaped communicating pipe for reaction, the dosing device 160 is used for dosing the coagulation reactor 120 and continuously stirring the coagulation reaction, and impurities such as oil drops, suspended matters and the like in water are coalesced; conveying the coagulated waste liquid to a first-stage air flotation separation device 131 through a first self-flow vertical pipe 182, collecting solid-phase scum separated by air flotation to a first sewage tank 135 through a first foam scraping device 133, conveying the waste liquid to a second-stage air flotation separation device 132, collecting the solid-phase scum separated by air flotation to a second sewage tank 136 through a first foam scraping device 134, conveying the sewage separated by air flotation to a sewage cache tank 141, conveying the sewage to a two-stage fine filtration device 150 through a second lift pump 172, freely switching a two-stage filtration series connection or double-filter parallel connection process according to working conditions, removing residual trace suspended impurities in the water, and directly discharging filtered clean water; first dirty oil groove 135 and second dirty oil groove 136 are connected with dirty oil buffer tank 142 through second from flow riser 183, are connected with dirty oil outer discharge port 230 through dirty oil pump 173 and can collect the dirty oil, accomplish the high-efficient separation of profit of waste liquid.
The compact modular oil-water efficient separation equipment for offshore well workover flowback integrates a multi-stage treatment process, has higher treatment and accommodation performance on flowback oil-water mixed waste liquid, and has higher oil-containing limit value of feed liquid; the influence of complex components in the waste liquid is effectively relieved through the conditioning effect of various chemical agents, and the separation effect is ensured; the mechanical dissolved air floatation has higher bubble solubility and smaller bubble particle size; the treatment process is flexible, and the filtration precision can be adjusted according to the on-site water quality condition.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (10)
1. A compact modular oil-water high-efficiency separation equipment for offshore well workover flowback is characterized by comprising:
the feed inlet of the advection oil removing device is communicated with oil and water; and
the coagulation reactor is communicated with a bottom discharge hole of the advection oil removal device;
the dosing device is connected with the coagulation reactor;
the liquid inlet at the bottom of the first-stage air floatation separation device is communicated with the coagulation reactor;
a liquid inlet at the bottom of the secondary air-flotation separation device is communicated with a water receiving opening at the top of the primary air-flotation separation device;
the sewage buffer tank is communicated with a water receiving port at the top of the secondary air floatation separation device;
the two first foam scraping devices are respectively and rotatably arranged at the tops of the primary air floatation separation device and the secondary air floatation separation device;
the two sewage oil tanks are respectively arranged at one side of the first-stage air floatation separation device and one side of the second-stage air floatation separation device and are used for correspondingly collecting the solid-phase scum separated by the two first scum scraping devices one by one;
a feed inlet of the dirty oil buffer tank is communicated with the two dirty oil tanks, and a discharge outlet of the dirty oil buffer tank is connected with a dirty oil discharge outlet;
the two-stage fine filtering devices are arranged in series or in parallel, the material inlet of each two-stage fine filtering device is connected with the liquid outlet of the sewage buffer tank, and the material outlet of each two-stage fine filtering device is connected with the water outlet;
the pry body is of a double-layer structure;
wherein, advection deoiling device, coagulation reactor and charge device all set up in the superstructure of sled body, one-level air supporting separator, second grade air supporting separator, buffer tank and the meticulous filter equipment setting of two-stage are in the substructure of sled body.
2. The compact modular oil-water high-efficiency separation equipment for offshore completion well flowback of claim 1, further comprising:
the liquid inlet of the first lifting pump is arranged in the oil water;
one end of the liquid inlet vertical pipe is connected with a liquid outlet of the first lifting pump, and the other end of the liquid inlet vertical pipe is connected with the advection oil removing device;
a liquid inlet of the second lift pump is connected with a liquid outlet of the sewage cache tank, and a liquid outlet of the second lift pump is connected with the two-stage fine filtering device;
one end of the U-shaped communicating pipe is connected with a bottom discharge hole of the advection oil removing device, and the other end of the U-shaped communicating pipe is connected with the coagulation reactor;
one end of the first self-flow vertical pipe is connected with the coagulation reactor, and the other end of the first self-flow vertical pipe is connected with a bottom liquid inlet of the primary air floatation separation device;
and one end of the second self-flow vertical pipe is connected with the two dirty oil tanks, and the other end of the second self-flow vertical pipe is connected with the dirty oil cache tank.
3. The compact modular oil-water high-efficiency separation equipment for offshore completion well flowback of claim 2, further comprising:
and the second foam scraping device is arranged at the top of the advection oil removing device and is used for recovering the separated crude oil.
4. The compact modular oil-water high-efficiency separation equipment for the flowback of an offshore completion well according to claim 3, wherein the chemical adding device is arranged at the upper part of the coagulation reactor.
5. The compact modular oil-water high-efficiency separation equipment for offshore well completion flowback of claim 4, wherein the dosing device comprises a dosing tank, a metering dosing pump and a blade stirrer.
6. The compact modular oil-water high-efficiency separation equipment for the flowback of an offshore completion well according to claim 5, wherein the coagulation reactor is provided with a double-layer blade type stirrer.
7. The compact modular oil-water high-efficiency separation equipment for the flowback of an offshore well completion according to claim 6, wherein the first-stage air flotation separation device and the second-stage air flotation separation device both use mechanical dissolved air flotation pumps, and the pump return flow rate of the mechanical dissolved air flotation pumps is in the range of 30-60%.
8. The compact modular oil-water high-efficiency separation equipment for the flowback of the offshore well completion as claimed in claim 7, wherein the feed inlet of the advection oil removal device, the discharge outlet of the dirty oil buffer tank and the discharge outlet of the two-stage fine filtering device are all connected by a union.
9. The compact modular oil-water high-efficiency separation equipment for the flowback of the offshore well completion as claimed in claim 8, wherein the two-stage fine filtration device adopts a two-stage microporous membrane for filtration, and the filter element precision of the two-stage microporous membrane can be adjusted according to the water quality.
10. The compact modular oil-water high-efficiency separation equipment for offshore completion well flowback of claim 9, wherein the size of the pry body is as follows: l is less than or equal to 6500, W is less than or equal to 2500, and H is less than or equal to 5500;
wherein L is the length, W is the width, and H is the height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120513513.8U CN215102433U (en) | 2021-03-11 | 2021-03-11 | Compact modular oil-water efficient separation equipment for offshore well workover flowback |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120513513.8U CN215102433U (en) | 2021-03-11 | 2021-03-11 | Compact modular oil-water efficient separation equipment for offshore well workover flowback |
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| Publication Number | Publication Date |
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| CN215102433U true CN215102433U (en) | 2021-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120513513.8U Active CN215102433U (en) | 2021-03-11 | 2021-03-11 | Compact modular oil-water efficient separation equipment for offshore well workover flowback |
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| CN (1) | CN215102433U (en) |
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2021
- 2021-03-11 CN CN202120513513.8U patent/CN215102433U/en active Active
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