CN210798888U - Low-pressure mud system with well drilling, well repairing and well completion functions - Google Patents
Low-pressure mud system with well drilling, well repairing and well completion functions Download PDFInfo
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- CN210798888U CN210798888U CN201921719016.2U CN201921719016U CN210798888U CN 210798888 U CN210798888 U CN 210798888U CN 201921719016 U CN201921719016 U CN 201921719016U CN 210798888 U CN210798888 U CN 210798888U
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Abstract
The utility model discloses a low-pressure slurry system with well drilling, well repairing and well completion functions, which comprises a slurry mixing lightering pump, wherein the input end of the slurry mixing lightering pump is respectively connected with a slurry pool and a brine pool through two valves; the output end of the slurry mixing lightering pump is respectively connected with the input end of the slurry mixing funnel and the storage cabin through two valves, and the output end of the slurry mixing funnel is respectively connected with the slurry pool, the brine pool and the storage cabin through five valves; connecting a slurry filling pump to a pipeline between a slurry pool and a slurry mixing lightering pump through a valve, and connecting a well completion service filling pump to a pipeline between a brine pool and the slurry mixing lightering pump through a valve; the output end of the slurry filling pump is connected with the high-pressure slurry pump; the output end of the well completion service perfusion pump is connected with the well completion service pump; when the system of the utility model is used, when the mud or the salt water is needed to be used, the mud or the salt water can be output only by opening or closing the corresponding valve; is very convenient and practical.
Description
Technical Field
The invention relates to a low-pressure mud system of an ocean semi-submersible workover platform, in particular to a low-pressure mud system with well drilling, workover and completion functions.
Background
With the rapid development of the offshore oil exploitation industry, the demand for the versatility of the offshore platform is more and more strong. The novel semi-submersible type well repairing platform is a movable device which integrates the functions of well repairing, installation and recovery of an underwater Christmas tree, well logging, well killing, underwater equipment processing and the like, and simultaneously takes the functions of a drilling platform into consideration. The versatility of the platform puts high requirements on equipment arrangement and system design, the system design is relatively complex, and a plurality of factors need to be comprehensively considered.
The low-pressure mud system is used as a conventional and core system of an ocean drilling platform and mainly comprises the processes of mud storage and transportation, mud mixing and mud treatment. The mud is used as the working medium necessary for drilling, and is prepared by uniformly mixing clay, barite and various chemical treatment agents according to a specific proportion to form a liquid mixture in a base liquid and supplying the liquid mixture to a high-pressure mud system. At present, a low-pressure mud system meeting the drilling function is mature, and a working medium for well repairing and well completion is mainly saline and has a demand for the saline. More specifically, conventional drilling platforms often focus on the supply of mud only to provide lubrication during drilling, but in order to allow the drilling platform to have both workover and completion functions, the mud pit of the platform must be fully used as a brine pit to provide sufficient brine.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a low-pressure mud system with well drilling, well repairing and well completion functions, which can be improved on the traditional low-pressure mud system, so that the low-pressure mud system can also provide enough saline water.
In order to achieve the purpose, the invention adopts the following technical scheme:
a low-pressure slurry system with well drilling, well repairing and well completion functions comprises a slurry mixing and lightering pump, wherein the input end of the slurry mixing and lightering pump is respectively connected with a slurry pool and a brine pool through two valves; the output end of the slurry mixing lightering pump is respectively connected with the input end of the slurry mixing funnel and the storage cabin through two valves, and the output end of the slurry mixing funnel is respectively connected with the slurry pool, the brine pool and the storage cabin through three valves;
the connecting pipeline between the mud pit and the mud mixing lightering pump is connected with the input end of the mud filling pump through a valve, and the connecting pipeline between the brine pit and the mud mixing lightering pump is connected with the input end of the well completion service pouring pump through a valve;
the output end of the slurry filling pump is connected with the input end of the high-pressure slurry pump and used for outputting slurry; the output end of the well completion service perfusion pump is connected with the input end of the well completion service pump for outputting the saline water;
a connecting pipeline between the output end of the slurry mixing lightering pump and the brine tank is also connected with a brine filtering unit in series through a valve; the input end of the well completion service filling pump is also connected with a diesel storage cabin and a glycol storage cabin in parallel through two valves respectively;
the storage compartment has a volume greater than the volume of the mud pit and the volume of the brine pit.
Preferably, a stirrer, a low-pressure mud gun, a tank washing machine, a liquid level transmitter and a pressure transmitter are arranged at the top of the mud pit.
Preferably, an agitator, a tank washer, a liquid level transmitter and a pressure transmitter are arranged on the top of the brine pond.
Preferably, the brine pond is further connected to the seawater input pipeline, the brine input pipeline, the washing tank input pipeline, the slurry return pipeline, the brine return pipeline, the two-way mixing main pipeline and the drilling water input pipeline through valves respectively.
Preferably, the mud pit is further connected to the seawater input pipeline, the base oil input pipeline, the washing tank input pipeline, the mud return pipeline, the two-way mixing main pipeline and the drilling water input pipeline through valves respectively.
The invention has the advantages that on the basis of the original drilling platform, the existing slurry mixing lightering pump and slurry mixing funnel on the original drilling platform are utilized, and the well completion service filling pump, the well completion service pump, the brine filtering unit and the pipeline valve are additionally arranged, so that the processes of treating, filtering and homogenizing brine can be carried out in the brine tank, the slurry tank, the storage cabin, the slurry mixing lightering pump and the slurry mixing funnel, and the equipment setting is greatly saved; when the mud needs to be used, the mud can be output only by opening or closing the corresponding valves to seal the brine tank, and communicating the mud tank and the high-pressure mud pump; when the brine needs to be used, the mud pit is also used as a brine pit to inject the brine, the corresponding valve is opened or closed to seal the high-pressure mud pump, and the mud pit, the brine pit and the well completion service pump are conducted to output the brine; in addition, due to the design of the storage cabins with large capacity, the storage cabins can be used for storing the treated and uniformly circulated mud or brine, and the mud or the brine can be led out by pulling the valve at any time when needed, so that the storage cabins are very convenient and practical.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a front view of a semi-submersible rig on which the system of the present invention is located;
FIG. 3 is a plan view of a slurry pump chamber of a semi-submersible workover platform in which the system of the present invention is located;
fig. 4 is a plan view of a mud cell of a semi-submersible workover rig in which the system of the present invention is located.
In the figure:
11. a slurry mixing lightering pump 12, a slurry mixing funnel 13, a slurry filling pump 14, a well completion service filling pump 15 and a storage cabin;
1. baseline, 2, pump bay bottom deck, 201, float pump bay, 202, float mud/brine bay, 3, float deck, 4, column area, 5, bottom deck, 6, machine deck, 601, mud pump bay, 602, mud sump, 7, middle deck, 8, main deck, 801, bulk bag bay, 9, living module area, 10, derrick and rig floor area.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
Referring first to FIG. 1, the system of the present invention is provided with two mud tanks and a brine tank; one of the mud ponds is located at the upper part of the figure, and the other mud pond and the brine pond are located at the lower part of the figure together.
The device comprises a slurry mixing lightering pump 11, wherein the input end of the slurry mixing lightering pump 11 is respectively connected with a slurry pool and a brine pool through valves; the output end of the slurry mixing lightering pump 11 is respectively connected with the input end of the slurry mixing funnel 12 and the storage cabin 15 through valves, and the output end of the slurry mixing funnel 12 is respectively connected with the slurry pool, the brine pool and the storage cabin 15 through valves; a slurry injection pump 13 is connected to the pipeline between the mud pit and the slurry mixing lightering pump 11 through a valve, and a completion service injection pump 14 is connected to the pipeline between the brine pit and the slurry mixing lightering pump 11 through a valve. The storage compartments 15 are shown as one and the same compartment, but with a plurality of connections to different lines.
The output end of the slurry filling pump 13 is connected with a high-pressure slurry pump; the output end of the completion service perfusion pump 14 is connected with the completion service pump;
a pipeline between the output end of the slurry mixing lightering pump 11 and the brine tank is also connected with a brine filtering unit in series through a valve; the input end of the well completion service filling pump 14 is also connected with a diesel storage cabin and a glycol storage cabin in parallel through valves respectively; diesel and ethylene glycol also have certain requirements in workover and completion.
The storage compartment 15 has a volume much greater than the volumes of the mud pit and the brine pit.
A stirrer, a low-pressure mud gun, a cabin washing machine, a liquid level transmitter and a pressure transmitter are arranged at the top of the mud pit; a stirrer, a cabin washing machine, a liquid level transmitter and a pressure transmitter are arranged at the top of the brine pond; but the arrangement of these devices may be exactly the same as the mud pit can sometimes be used as a brine pit.
The brine pond is also respectively connected with the seawater input pipeline, the brine input pipeline, the washing cabin input pipeline, the slurry/brine backflow pipeline, the two-way mixing main pipeline and the drilling water input pipeline through valves. The mud pit is also respectively connected with a seawater/base oil input pipeline, a washing cabin input pipeline, a mud backflow pipeline, a two-way mixing main pipeline and a drilling water input pipeline through valves.
In the device, the high-pressure mud pump is used for outputting mud and can be used for lubricating during drilling; the well completion service pump is used for outputting saline water, and can be used for well completion and well repair;
if the drilling operation needs to use the slurry, a valve between the slurry pool and the slurry mixing lightering pump 11 is opened, a valve between the brine pool and the slurry mixing lightering pump 11 is closed, and the slurry enters the slurry mixing lightering pump 11 through the slurry pool; the slurry mixing lightering pump 11 conveys the slurry to the slurry mixing hopper 12, and raw materials required by the slurry can be added to the slurry mixing hopper 12 for further forming the slurry; then, firstly, the mud is only conducted back to the mud pool through each valve for further circulation and uniformity of the mud; after the mud is uniformly mixed in a loop of a mud pit, a mud mixing and transfer pump 11 and a mud mixing hopper 12, a valve in front of a storage cabin 15 and a mud filling pump 13 is opened, on one hand, the mud is stored in the storage cabin 15, on the other hand, the mud is conveyed to a high-pressure mud pump through the mud filling pump 13, and the mud is conveyed out for drilling through the high-pressure mud pump; if the uniformly manufactured slurry needs to be used in some emergency situations, a valve of the storage cabin 15 can be opened, and the slurry in the storage cabin 15 is led out to a slurry pool and finally enters a high-pressure slurry pump;
if the workover and completion operation needs to use brine, valves among the mud pit, the brine pit and the mud mixing and lightering pump 11 are opened, and the mud pit is used as the brine pit; the brine enters a slurry mixing lightering pump 11 through a brine pond and a slurry pond; the slurry mixing lightering pump 11 conveys the salt water to the slurry mixing funnel 12, and raw materials required by the salt water and the like can be added at the slurry mixing funnel 12 for further formation of the salt water; after the brine is uniformly mixed in a loop of the brine pond, the slurry mixing and transfer pump 11 and the slurry mixing funnel 12, the brine can be introduced into a brine filtering unit (which can be conventional filtering equipment) to filter out impurities through the control of a valve, and then the brine is conducted back to the brine pond to be further used; then, the valves in front of the storage cabin 15 and the well completion service filling pump 14 are opened, on one hand, the saline is stored in the storage cabin 15, on the other hand, the saline is conveyed to the well completion service pump through the well completion service filling pump 14, and the saline is conveyed out through the well completion service pump; if the uniformly prepared brine is required to be used in some emergency situations, the valve of the storage cabin 15 can be opened, and the brine in the storage cabin 15 is led out to a brine pond and finally enters a well completion service pump;
it is needless to say that the common devices for discharging the slurry and the brine, such as the slurry tank and the slurry mixing and transfer pump 11, can be cleaned with seawater or the like before use.
Next, with reference to fig. 2 to 4, the location and the content of the system of the present invention will be described in more detail. Fig. 2 to 4 include: baseline 1, pump bay bottom deck 2, float pump bay 201, float mud/brine bay 202 (which may be used as first storage bay 15 or second storage bay 16), float deck 3, column section 4, bottom deck 5, machine deck 6, mud pump room 601, mud pit room 602, middle deck 7, main deck 8, bulk bag room 801, living module section 9, derrick and drill floor section 10.
FIG. 2 is a front view of the semi-submersible work platform. The base line 1, the bottom deck 2 of the pump cabin, the floating body deck 3, the upright post area 4, the bottom deck 5, the mechanical deck 6, the middle deck 7 and the main deck 8 are arranged from bottom to top in sequence.
Fig. 3 is a plan view of the slurry pump chamber 601. As shown, the machinery deck 6 (127500 mm from baseline) is primarily provided with 2 high pressure mud pumps, 1 completion services pump, 4 mud mixing lightering pumps 11, 2 mud injection pumps 13, 1 completion services pump 14 and 1 wash-room unit.
Fig. 4 is a plan view of a mud cell 602 in accordance with the present invention. As shown, the machinery deck 6 is provided with 14 mud/brine ponds in total, and a high-speed stirrer, a low-pressure mud gun, a mud shearing unit, a stirrer, a tank washer, a liquid level transmitter and a pressure transmitter are mainly arranged at the top of the pond (131000 mm from a base line).
The floating body low-pressure slurry system is designed conventionally, the port and the starboard of the platform floating body are respectively provided with 2 interfaces (11625 mm-7475 mm from a base line) of a storage cabin 15, a discharge pipeline of the storage cabin 15 enters a pipeline/pedestrian channel positioned on the floating body and is guided to 2 slurry mixing lightering pumps 11 on the bottom deck 2 (11625 mm from the base line) of the port and starboard pump cabins at the bow part, and an outlet pipeline of the slurry mixing lightering pumps 11 passes through the pipeline channel positioned on the bow part upright post and is finally conveyed to a slurry/brine pond.
A mixing main pipe, a slurry return pipeline, a drilling water input pipeline, a base oil input pipeline and a seawater input pipeline are arranged above the slurry/brine tank, and are mixed according to a specific proportion through equipment such as a high-speed stirrer, a low-pressure slurry gun and a stirrer, enter 2 mixing lightering manifolds located in a slurry pump chamber 601, and are conveyed to a slurry mixing hopper 12, a well cementation unit, a metering cabinet, a floating body slurry/brine tank and a brine filtering unit through 4 slurry mixing lightering pumps 11. 3 branches are branched from the hybrid barge manifold and are delivered to the high pressure mud pump and the completion service pump through 2 mud injection pumps 13 and 1 completion service injection pump 14 respectively.
The low-pressure mud system can meet the special requirements of well repairing and well completion functions on the low-pressure mud system through optimized design. When well repairing and well completing operation is carried out, all the slurry pools are used as brine pools, the slurry mixing and transferring pump 11 can convey brine in the brine pools to a brine filtering unit (140500 mm away from a base line) above the bulk bag chamber 801 through an outlet manifold for filtering, and the filtered brine enters a starboard mixing main pipe, a brine main pipe and a port mixing main pipe and returns to the brine pools and the storage cabin 15; the slurry mixing lightering pump 11 can directly convey the brine in the brine tank to a brine filtering unit for filtering through an outlet manifold of the slurry mixing lightering pump 11, and the filtered brine returns to the brine tank and can return to the storage cabin 15 through a stand column pipeline channel; seawater filling pipelines are arranged above the mud pit, and seawater and base oil are filled and share one pipeline by considering the arrangement of the pipelines above the port mud pit, and the conversion of two media is realized by using a valve and a detachable short pipe; the completion service injection pump 14 can deliver not only the brine to the completion pump, but also diesel and glycol auxiliary media to the completion service pump to perform well workover and completion functions.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (5)
1. The low-pressure slurry system with the functions of well drilling, well repairing and well completion is characterized by comprising a slurry mixing lightering pump, wherein the input end of the slurry mixing lightering pump is respectively connected with a slurry pool and a brine pool through two valves; the output end of the slurry mixing lightering pump is respectively connected with the input end of a slurry mixing funnel and the storage cabin through two valves, and the output end of the slurry mixing funnel is respectively connected with the slurry tank, the brine tank and the storage cabin through three valves;
the connecting pipeline between the mud pit and the mud mixing lightering pump is connected with the input end of a mud filling pump through a valve, and the connecting pipeline between the brine pit and the mud mixing lightering pump is connected with the input end of a well completion service filling pump through a valve;
the output end of the slurry filling pump is connected to the input end of the high-pressure slurry pump and used for outputting slurry; the output end of the well completion service perfusion pump is connected with the input end of the well completion service pump for outputting saline water;
a connecting pipeline between the output end of the slurry mixing lightering pump and the brine tank is also connected with a brine filtering unit in series through a valve; the input end of the well completion service filling pump is also connected with a diesel storage cabin and a glycol storage cabin in parallel through two valves respectively;
the storage compartment has a volume greater than the volume of the mud pit and the volume of the brine pit.
2. The low pressure mud system with well drilling, workover and completion functions of claim 1, wherein a stirrer, a low pressure mud gun, a tank washing machine, a liquid level transmitter and a pressure transmitter are arranged at the top of the mud pit.
3. The low pressure mud system with well workover and completion functions of claim 1, wherein an agitator, a tank washer, a level transmitter, and a pressure transmitter are disposed at the top of the brine pond.
4. The low pressure mud system with well intervention and completion functions of claim 1, wherein the brine pond is further connected to the seawater input line, the brine return line, the brine input line, and the drilling water input line, respectively, through valves.
5. The low pressure mud system with well intervention and completion functions of claim 1, wherein the mud pit is further connected to the seawater input line, the mud return line, and the drilling water input line through valves, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921719016.2U CN210798888U (en) | 2019-10-15 | 2019-10-15 | Low-pressure mud system with well drilling, well repairing and well completion functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921719016.2U CN210798888U (en) | 2019-10-15 | 2019-10-15 | Low-pressure mud system with well drilling, well repairing and well completion functions |
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| Publication Number | Publication Date |
|---|---|
| CN210798888U true CN210798888U (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921719016.2U Active CN210798888U (en) | 2019-10-15 | 2019-10-15 | Low-pressure mud system with well drilling, well repairing and well completion functions |
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| CN (1) | CN210798888U (en) |
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- 2019-10-15 CN CN201921719016.2U patent/CN210798888U/en active Active
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