CN106801588B - semi-closed slurry pressure-maintaining circulation process for drilling construction of confined water stratum - Google Patents
semi-closed slurry pressure-maintaining circulation process for drilling construction of confined water stratum Download PDFInfo
- Publication number
- CN106801588B CN106801588B CN201710008293.1A CN201710008293A CN106801588B CN 106801588 B CN106801588 B CN 106801588B CN 201710008293 A CN201710008293 A CN 201710008293A CN 106801588 B CN106801588 B CN 106801588B
- Authority
- CN
- China
- Prior art keywords
- slurry
- pipe
- outlet
- mud
- orifice
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002002 slurry Substances 0.000 title claims abstract description 120
- 238000005553 drilling Methods 0.000 title claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 238000010276 construction Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 238000000926 separation method Methods 0.000 claims abstract description 39
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 239000002689 soil Substances 0.000 claims abstract description 15
- 238000003860 storage Methods 0.000 claims description 53
- 239000002893 slag Substances 0.000 claims description 30
- 239000012530 fluid Substances 0.000 claims description 19
- 238000007599 discharging Methods 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000004576 sand Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/065—Separating solids from drilling fluids
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Earth Drilling (AREA)
Abstract
the invention discloses a semi-closed mud pressure maintaining circulation process for drilling construction of confined water stratum, wherein (A) a drilling machine, a mud pit, a mud pump, an orifice sealing device and a solid-liquid separation device are respectively arranged; (B) communicating a slurry outlet of a slurry pool with a slurry inlet of a slurry pump, and communicating a slurry outlet of the slurry pump with a slurry inlet of a drilling machine; (C) a slurry inlet of the solid-liquid separation device is communicated with a slurry outlet of the orifice sealing device, and a slurry outlet of the solid-liquid separation device is communicated with a slurry inlet of the slurry pool; (D) setting a pressure threshold value in the solid-liquid separation device according to the pressure of the pressure-bearing water at the position of the drilled hole and the depth of the stratum, so that the pressure balance is formed between the slurry in the drilled hole and the soil and water in the stratum; (E) and a drill rod of the drilling machine passes through the orifice sealing device to carry out drilling construction. The semi-closed slurry pressure maintaining circulation process for the drilling construction of the confined water stratum does not cause water and soil loss and does not influence the normal propulsion of the drill under the condition of slurry protection.
Description
Technical Field
The invention relates to equipment in the technical field of confined water stratum drilling construction, in particular to a semi-closed slurry pressure maintaining circulation process for confined water stratum drilling construction.
Background
in the construction of municipal tunnels, deep foundation pits and subways, part of working faces of drilling construction are positioned below underground water level or the positions of openings are positioned in confined water strata, and when no measures are taken for construction, accidents such as water gushing and sand gushing occur frequently, so that the water and soil loss of the strata is serious, even the ground collapses, and surrounding structures are damaged. Therefore, in the process of horizontal drilling construction in the confined water stratum, the water and soil pressure balance of the slurry and the stratum can slow down or avoid the disturbance influence of drilling construction on the original stratum, and the water and soil loss is reduced. For example, in the vertical drilling process of a geological exploration or coal mine, accidents such as hole collapse and the like can be avoided due to water and soil pressure balance generated by the specific gravity of the slurry.
The solution commonly used today is to drill the seal with an orifice tube, a valve and a hold-down device (see fig. 1). Under the construction of this drilling equipment, there are following drawbacks: 1) the pressure of the slurry in the hole is unstable, and the slurry is difficult to form water and soil pressure balance with the stratum; 2) the slag discharge during drilling can only depend on the opening of the orifice pipe bypass valve, and water gushing and sand gushing are easily caused. Therefore, the key point is to discharge slag in the hole under the stable mud pressure, and how to effectively discharge the slag under the mud pressure is the key point of the drilling construction of the confined water stratum.
disclosure of Invention
in view of the above, the invention provides a semi-closed slurry pressure maintaining circulation process for confined water stratum drilling construction, which does not cause water and soil loss and does not influence normal propulsion of a drill hole under the condition of slurry protection.
the invention is realized by the following technical scheme:
The semi-closed slurry pressure maintaining circulation process for confined water stratum drilling construction comprises the following steps:
(A) A drilling machine, a mud pit, a mud pump, an orifice sealing device and a solid-liquid separation device are respectively arranged;
(B) Communicating a mud outlet of the mud pit with a mud inlet of the mud pump, and communicating a mud outlet of the mud pump with a mud inlet of the drilling machine;
(C) A slurry inlet of the solid-liquid separation device is communicated with a slurry outlet of the orifice sealing device, and a slurry outlet of the solid-liquid separation device is communicated with a slurry inlet of the slurry pool;
(D) setting a pressure threshold value in the solid-liquid separation device according to the pressure of the pressure-bearing water at the position of the drilled hole and the depth of the stratum, so that the pressure balance is formed between the slurry in the drilled hole and the soil and water in the stratum; when the pressure in the solid-liquid separation device exceeds a set pressure threshold value, a slurry outlet of the solid-liquid separation device is opened and slurry is discharged into the slurry pool; when the pressure in the solid-liquid separation device is lower than a set pressure threshold value, a slurry outlet of the solid-liquid separation device is closed;
(E) And a drill rod of the drilling machine penetrates through the orifice sealing device to carry out drilling construction, and mud is discharged through the orifice sealing device and enters the solid-liquid separation device.
The semi-closed slurry pressure maintaining circulation process for drilling construction of the confined water stratum comprises an orifice pipe, a ball valve and a compressing device, wherein one end of the orifice pipe extends into a drilled hole, the compressing device is installed at the other end of the orifice pipe, and the ball valve is installed on the orifice pipe between a drilled hole inlet and the compressing device; and the drill rod sequentially penetrates through the pressing device, the pipe orifice of one end, far away from the drill hole, of the orifice pipe and the ball valve to perform drilling construction.
The semi-closed slurry pressure maintaining circulation process for confined water stratum drilling construction comprises the steps that a solid-liquid separation device comprises a first pipeline, a second pipeline, a slurry storage tank and an adjustable automatic pressure relief valve; the inlet of the first pipeline is communicated with the orifice pipe, and the outlet of the first pipeline is communicated with the inlet of the second pipeline; the outlet of the second pipeline is communicated with the inlet of the slurry storage tank, and the adjustable automatic pressure relief valve is arranged at the slurry outlet at the top of the slurry storage tank. The pipe hole cross-sectional area of the second pipeline is larger than that of the first pipeline, and the cross-sectional area of the slurry storage tank is larger than that of the second pipeline. The size ratio of the cross-sectional area of the pipe hole of the first pipeline, the cross-sectional area of the slurry storage tank and the cross-sectional area of the pipe hole of the second pipeline is determined according to the principle that solids such as drill cuttings in slurry can be fully separated from the slurry after the fluid is decelerated. On the basis of knowing the technical scheme of the invention, the ordinary technology in the field can specifically determine without spending any creative labor, so that detailed description is not repeated in detail according to specific construction conditions. However, according to the experience of solid-liquid separation by changing the flow rate, the ratio of the cross-sectional area of the tube holes of the second pipe to the cross-sectional area of the tube holes of the first pipe is at least 2: 1; the ratio of the cross-sectional area of the slurry storage tank to the cross-sectional area of the pipe hole of the second pipeline is 9:1 at least.
the semi-closed slurry pressure maintaining circulation process for drilling construction of the confined water stratum comprises a port sealing device, a ball valve, a drilling inlet, a port pipe, a slurry discharging pipe and a slurry discharging pipe, wherein the port pipe is communicated with the ball valve and the drilling inlet; the inlet of the first pipe is communicated with the outlet of the mud discharging pipe.
The pressure-maintaining circulation process for the semi-closed slurry in the confined water stratum drilling construction is characterized in that a slag outlet is formed in the bottom of the slurry storage tank, and a slag outlet valve is installed at the slag outlet.
According to the semi-closed slurry pressure maintaining circulation process for confined water stratum drilling construction, the slag storage groove is arranged below the slag discharging valve, and the inlet of the slag storage groove is communicated with the outlet of the slag discharging valve.
according to the semi-closed mud pressure maintaining circulation process for drilling construction of the confined water stratum, the mud outflow pipe is installed at the top of the mud storage tank, and the exhaust valve and the pressure gauge are installed on the side guide pipe of the mud outflow pipe.
according to the semi-closed mud pressure maintaining circulation process for drilling construction of the confined water stratum, the outlet of the mud outflow pipe is communicated with the inlet of the adjustable automatic pressure relief valve, and the outlet of the adjustable automatic pressure relief valve is communicated with the mud pit.
Above-mentioned confined water stratum drilling construction semi-closed mud pressurize circulation technology, the second pipeline includes fixed connection and the straight tube section and the bend pipe section that switch on each other, the one end of straight tube section passes the jar wall at pulp storage tank middle part and deepens in the pulp storage tank, the bend pipe section is located in the pulp storage tank, the export orientation of bend pipe section the bottom of pulp storage tank.
In the semi-closed slurry pressure maintaining circulation process for drilling construction of the confined water stratum, the fluid inlet direction of the first pipeline is perpendicular to the fluid inlet direction of the orifice pipe; the fluid outlet direction of the first pipeline is perpendicular to the axis of the straight pipe section; and the fluid flow direction in the straight pipe section is vertical to the fluid flow direction at the outlet of the bent pipe section.
according to the semi-closed slurry pressure maintaining circulation process for drilling construction of the confined water stratum, the other end of the straight pipe section is provided with the drainage and maintenance valve.
The invention has the beneficial effects that:
1. The drainage and maintenance valve is arranged, so that the pressure can be relieved and the drainage can be realized after the valve is opened, and the valve can also be used as a channel for flushing residues in the tank.
2. And the valve connected with the orifice pipe and the first pipeline are arranged beside the second pipeline and used for changing the direction and reducing the speed of the primary slurry.
3. The outlet of the bent pipe section is arranged to face the bottom of the slurry storage tank and is used for changing the direction and reducing the speed of the secondary slurry.
4. and when the pressure of the slurry in the tank exceeds the threshold value of the adjustable automatic pressure relief valve arranged at the top, the automatic pressure relief valve is automatically opened to form a slurry circulation passage, the slurry flows into the slurry preparation pool, otherwise, the pressure maintaining is closed.
5. The bottom of the slurry storage tank is provided with a slag storage tank through a valve seal. The opening and closing of the bottom valve is used for achieving the purpose of deslagging under the condition of pressure maintaining with the least possible or even without discharging slurry.
6. The drilling fluid can not cause water and soil loss and influence the normal propulsion of the drilling under the condition of slurry protection, and can be matched with the existing orifice device for use. The invention realizes the separation of solid (sand) and liquid (slurry) by changing the flow speed and the flow direction of the fluid under the pressure maintaining action of the closed circulation system.
7. The process is applied to the drilling construction process in the confined water stratum, the water and soil pressure balance of the slurry and the stratum can slow down or avoid the disturbance influence of the drilling construction on the original stratum, the water and soil loss is reduced, and the normal propulsion of drilling is ensured.
Drawings
Fig. 1 is a schematic diagram of a prior art drilling construction during sealed drilling.
FIG. 2 is a schematic structural diagram of a semi-closed mud pressure maintaining circulation process for confined water stratum drilling construction.
FIG. 3 is a schematic diagram of the semi-closed mud pressure maintaining circulation process for confined water stratum drilling construction during drilling construction.
1-a first conduit; 2-a second conduit; 21-a straight tube section; 22-a bend section; 3-a pulp storage tank; 31-a slag outlet; 32-a slag discharge valve; 33-a mud outflow pipe; 34-a lateral catheter; 4-adjustable automatic pressure relief valve; 5-an exhaust valve and a pressure gauge; 6-slag storage tank; 7-draining and maintaining valve; 100-orifice tube; 200-a drill pipe; 300-a mud pit; 400-a check valve; 500-a compression device; 600-a drilling machine; 700-a mud pump; 800-ball valve; 900-bypass valve.
Detailed Description
For the purpose of illustrating the invention in detail, preferred embodiments are given below with reference to the accompanying drawings.
as shown in fig. 3, the semi-closed slurry pressure maintaining circulation process for confined water stratum drilling construction in the embodiment includes the following steps:
(A) the drilling machine 600, the mud pit 300, the mud pump 700, the orifice sealing device and the solid-liquid separation device are respectively arranged;
(B) Communicating a mud outlet of the mud pit 300 with a mud inlet of the mud pump 700, and communicating a mud outlet of the mud pump 700 with a mud inlet of the drilling rig 600;
(C) A slurry inlet of the solid-liquid separation device is communicated with a slurry outlet of the orifice sealing device, and a slurry outlet of the solid-liquid separation device is communicated with a slurry inlet of the slurry pool 300;
(D) Setting a pressure threshold value in the solid-liquid separation device according to the pressure of the pressure-bearing water at the position of the drilled hole and the depth of the stratum, so that the pressure balance is formed between the slurry in the drilled hole and the soil and water in the stratum; when the pressure in the solid-liquid separation device exceeds a set pressure threshold value, a slurry outlet of the solid-liquid separation device is opened and slurry is discharged into the slurry tank 300; when the pressure in the solid-liquid separation device is lower than a set pressure threshold value, a slurry outlet of the solid-liquid separation device is closed;
(E) The drill rod 200 of the drilling machine 600 passes through the orifice sealing device to perform drilling construction, and mud is discharged through the orifice sealing device and enters the solid-liquid separation device.
As shown in fig. 2 and 3, the orifice sealing device includes an orifice tube 100, a ball valve 800, and a hold-down device 500, one end of the orifice tube 100 extending into the borehole, the hold-down device 500 being mounted on the other end of the orifice tube 100, the ball valve 800 being mounted on the orifice tube 100 between the borehole entrance and the hold-down device 500; the drill rod 200 sequentially passes through the pressing device 500, the orifice of the orifice pipe 100 at the end far away from the drill hole, and the ball valve 800 to perform drilling construction.
as shown in fig. 2 and fig. 3, the solid-liquid separation device comprises a first pipeline 1, a second pipeline 2, a slurry storage tank 3 and an adjustable automatic pressure relief valve 4; the inlet of the first pipeline 1 is communicated with an orifice pipe 100, and the outlet of the first pipeline 1 is communicated with the inlet of the second pipeline 2; the outlet of the second pipeline 2 is communicated with the inlet of the slurry storage tank 3, and the adjustable automatic pressure relief valve 4 is arranged at the slurry outlet at the top of the slurry storage tank 3. In this embodiment, the orifice sealing device further comprises a bypass valve 900 and a mud drainage pipe communicating with the orifice pipe 100 between the ball valve 800 and the borehole entrance, the bypass valve 900 being mounted on the mud drainage pipe; the inlet of the first pipe 1 communicates with the outlet of the mud pit.
The drill rod 200 passes through the bore of the bore tube 100, i.e. the first conduit 1 communicates with the annular space between the bore tube 100 and the drill rod 200. The pipe hole cross-sectional area of the second pipeline 2 is larger than that of the first pipeline 1, and the cross-sectional area of the slurry storage tank 3 is larger than that of the second pipeline 2. The size ratio of the cross-sectional area of the pipe hole of the first pipeline 1, the cross-sectional area of the slurry storage tank 3 and the cross-sectional area of the pipe hole of the second pipeline 2 is determined according to the principle that solids such as drill cuttings in slurry can be fully separated from the slurry after the fluid is decelerated; on the basis of knowing the technical scheme of the invention, the ordinary technology in the field can specifically determine without spending any creative labor, so that detailed description is not repeated in detail according to specific construction conditions. However, according to the experience of solid-liquid separation by changing the flow rate, the ratio of the cross-sectional area of the tube holes of the second pipe 2 to the cross-sectional area of the tube holes of the first pipe 1 is at least 2: 1; the ratio of the cross-sectional area of the slurry storage tank 3 to the cross-sectional area of the pipe hole of the second pipeline 2 is at least 9: 1. The second pipeline 2 comprises a straight pipe section 21 and a bent pipe section 22 which are fixedly connected and communicated with each other, one end of the straight pipe section 21 penetrates through the tank wall between the middle part and the top part of the slurry storage tank 3 and extends into the slurry storage tank 3, the bent pipe section 22 is positioned in the slurry storage tank 3, and the outlet of the bent pipe section 22 faces the bottom of the slurry storage tank 3. The fluid inlet direction of the first pipe 1 is perpendicular to the fluid inlet direction of the orifice pipe 100; the fluid outlet direction of the first pipeline 1 is perpendicular to the axis of the straight pipe section 21; the fluid flow direction in the straight pipe section 21 is perpendicular to the fluid flow direction at the outlet of the bend pipe section 22. And a water drainage and maintenance valve 7 is arranged at the other end of the straight pipe section 21.
The bottom of slurry storage tank 3 is provided with slag notch 31, slag notch 31 department installs slag tap valve 32. Slag storage groove 6 is installed to the below of slagging tap valve 32, the entry of slag storage groove 6 with the export intercommunication of slagging tap valve 32.
And a mud outflow pipe 33 is installed at the top of the mud storage tank 3, and an exhaust valve 5 is installed on the mud outflow pipe 33. The outlet of the mud outflow pipe 33 is communicated with the inlet of the adjustable automatic pressure relief valve 4, and the outlet of the adjustable automatic pressure relief valve 4 is communicated with the mud pit 300.
As shown in fig. 3, when the semi-closed mud pressure maintaining circulation process for drilling construction of the confined water stratum works, a threshold value adjustable from a relief valve 4 is set according to the confined water pressure at the position of the opening of the drilled hole and the stratum depth, so that the pressure balance is formed between the mud in the drilled hole and the soil and water in the stratum; the mud with high flow rate enters the second pipeline 2 from the annular space between the orifice pipe 100 and the drill rod 200 through the first pipeline 1, the flow direction of the mud changes for the first time and the cross section area of the second pipeline 2 is relatively increased relative to the cross section area of the first pipeline 1, the liquid flows slowly and then flows into the mud storage tank 3 through the bent pipe section 22, the flow direction of the mud changes for the second time and the flow section of the mud increases again, the speed is slowed down again, the mud flows upwards due to the fact that the pressure relief opening of the mud storage tank 3 is arranged at the top of the mud storage tank, and when the pressure in the mud storage tank 3 exceeds a preset adjustable threshold value of the pressure relief valve 4, the mud flows into the mud tank 300 through the adjustable automatic pressure relief valve 4. The slurry flows through the pressure-adjustable and controllable solid-liquid separation device, and solid (sand) and liquid (slurry) separation can be realized through twice section enlargement, flow speed slowing and twice flow direction changing. The sand and stone fall into the slag storage tank 6 after being separated, when a certain amount of sand and stone is reached, a slag discharging valve at the bottom of the slurry storage tank 3 can be closed, and the slag storage tank 6 is detached for slag discharging.
the above examples are provided for clarity of illustration only and are not intended to limit the invention to the particular embodiments described. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any obvious variations or modifications which come within the spirit and scope of the invention are desired to be protected by the following claims.
Claims (2)
1. The semi-closed slurry pressure maintaining circulation process for confined water stratum drilling construction is characterized by comprising the following steps of:
(A) A drilling machine (600), a mud pit (300), a mud pump (700), an orifice sealing device and a solid-liquid separation device are respectively arranged;
(B) communicating a mud outlet of the mud pit (300) with a mud inlet of the mud pump (700), communicating a mud outlet of the mud pump (700) with a mud inlet of the drilling rig (600);
(C) A slurry inlet of the solid-liquid separation device is communicated with a slurry outlet of the orifice sealing device, and a slurry outlet of the solid-liquid separation device is communicated with a slurry inlet of the slurry pool (300);
(D) Setting a pressure threshold value in the solid-liquid separation device according to the pressure of the pressure-bearing water at the position of the drilled hole and the depth of the stratum, so that the pressure balance is formed between the slurry in the drilled hole and the soil and water in the stratum; when the pressure in the solid-liquid separation device exceeds a set pressure threshold value, a slurry outlet of the solid-liquid separation device is opened and slurry is discharged into the slurry tank (300); when the pressure in the solid-liquid separation device is lower than a set pressure threshold value, a slurry outlet of the solid-liquid separation device is closed;
(E) a drill rod (200) of the drilling machine (600) passes through the orifice sealing device to carry out drilling construction, and mud is discharged through the orifice sealing device and enters the solid-liquid separation device;
the orifice sealing device comprises an orifice pipe (100), a ball valve (800) and a pressing device (500), one end of the orifice pipe (100) extends into a drill hole, the pressing device (500) is installed on the other end of the orifice pipe (100), and the ball valve (800) is installed on the orifice pipe (100) between the inlet of the drill hole and the pressing device (500); the drill rod (200) sequentially penetrates through the pressing device (500), a pipe orifice at one end, far away from the drill hole, of the orifice pipe (100) and the ball valve (800) to carry out drilling construction;
The solid-liquid separation device comprises a first pipeline (1), a second pipeline (2), a slurry storage tank (3) and an adjustable automatic pressure release valve (4); the inlet of the first pipeline (1) is communicated with an orifice pipe (100), and the outlet of the first pipeline (1) is communicated with the inlet of the second pipeline (2); an outlet of the second pipeline (2) is communicated with an inlet of the slurry storage tank (3), and the adjustable automatic pressure relief valve (4) is installed at a slurry outlet at the top of the slurry storage tank (3); the drill pipe (200) penetrates through a pipe hole of the orifice pipe (100), the pipe hole cross-sectional area of the second pipeline (2) is larger than that of the first pipeline (1), and the cross-sectional area of the mud storage tank (3) is larger than that of the second pipeline (2);
The bore sealing device further comprises a bypass valve (900) and a mud drainage pipe communicating with the bore pipe (100) between the ball valve (800) and a borehole inlet, the bypass valve (900) being mounted on the mud drainage pipe; the inlet of the first pipeline (1) is communicated with the outlet of the mud discharging pipe;
A slag outlet (31) is formed in the bottom of the slurry storage tank (3), and a slag outlet valve (32) is mounted at the position of the slag outlet (31); a slag storage groove (6) is arranged below the slag discharging valve (32), and the inlet of the slag storage groove (6) is communicated with the outlet of the slag discharging valve (32); a slurry outflow pipe (33) is installed at the top of the slurry storage tank (3), and an exhaust valve and a pressure gauge (5) are installed on a side guide pipe (34) of the slurry outflow pipe (33);
the outlet of the slurry outflow pipe (33) is communicated with the inlet of the adjustable automatic pressure relief valve (4), and the outlet of the adjustable automatic pressure relief valve (4) is communicated with a slurry pool (300);
The second pipeline (2) comprises a straight pipe section (21) and a bent pipe section (22) which are fixedly connected and communicated with each other, one end of the straight pipe section (21) penetrates through the wall of the middle part of the slurry storage tank (3) and extends into the slurry storage tank (3), the bent pipe section (22) is positioned in the slurry storage tank (3), and the outlet of the bent pipe section (22) faces to the bottom of the slurry storage tank (3);
the fluid inlet direction of the first conduit (1) is perpendicular to the fluid inlet direction of the orifice tube (100); the fluid outlet direction of the first pipeline (1) is vertical to the axis of the straight pipe section (21); the flow direction of the fluid in the straight pipe section (21) is vertical to the flow direction of the fluid at the outlet of the bent pipe section (22);
And a water drainage and maintenance valve (7) is arranged at the other end of the straight pipe section (21).
2. the confined water formation drilling construction semi-closed mud dwell cycle process of claim 1, wherein the ratio of the cross-sectional area of the pipe orifice of the second conduit (2) to the cross-sectional area of the pipe orifice of the first conduit (1) is at least 2: 1; the ratio of the cross-sectional area of the slurry storage tank (3) to the cross-sectional area of the pipe hole of the second pipeline (2) is 9:1 at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710008293.1A CN106801588B (en) | 2017-01-05 | 2017-01-05 | semi-closed slurry pressure-maintaining circulation process for drilling construction of confined water stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710008293.1A CN106801588B (en) | 2017-01-05 | 2017-01-05 | semi-closed slurry pressure-maintaining circulation process for drilling construction of confined water stratum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106801588A CN106801588A (en) | 2017-06-06 |
| CN106801588B true CN106801588B (en) | 2019-12-06 |
Family
ID=58984361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710008293.1A Active CN106801588B (en) | 2017-01-05 | 2017-01-05 | semi-closed slurry pressure-maintaining circulation process for drilling construction of confined water stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106801588B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654202A (en) * | 2017-10-25 | 2018-02-02 | 安达市天屹桩基有限责任公司 | Mud circulating vehicle |
| CN108194078A (en) * | 2018-02-14 | 2018-06-22 | 北京泰利新能源科技发展有限公司 | A kind of geothermal well pneumatic down-hole hammer creeps into blowout prevention sampler |
| CN110042872A (en) * | 2019-04-24 | 2019-07-23 | 天津建岩岩土工程有限公司 | Pressure-maintaining structure and its pressure maintaining method during middle-size and small-size basement construction |
| US20230221225A1 (en) * | 2020-06-29 | 2023-07-13 | Shimadzu Corporation | Sample purification apparatus and analysis system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6745857B2 (en) * | 2001-09-21 | 2004-06-08 | National Oilwell Norway As | Method of drilling sub-sea oil and gas production wells |
| FR2966818B1 (en) * | 2010-10-29 | 2014-02-14 | Orege | METHOD FOR SEPARATION BETWEEN LIQUID AND SUSPENDED MATERIAL OF A SLURRY AND DEVICE USING SUCH A METHOD |
| CN103573198B (en) * | 2012-08-03 | 2016-09-07 | 中国石油化工股份有限公司 | wellbore pressure and flow management system and method |
| CN203196388U (en) * | 2013-03-29 | 2013-09-18 | 杭州民生机械制造有限公司 | Separator |
-
2017
- 2017-01-05 CN CN201710008293.1A patent/CN106801588B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106801588A (en) | 2017-06-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106801588B (en) | semi-closed slurry pressure-maintaining circulation process for drilling construction of confined water stratum | |
| CN107575249B (en) | High-pressure slurry wall protection method and device | |
| CN101929331A (en) | Overall process under-balance drilling pressure compensation system and method | |
| CN111155929B (en) | Coal mine underground water hole prevention and control high-water-pressure water jacking directional drilling tool and drilling method | |
| CN105625483B (en) | A kind of underground engineering hydraulic pressure control method | |
| CN107816051B (en) | Pressure-bearing property phreatic aquifer deep basal pit combination well dewatering construction method | |
| CN102155187A (en) | Method for treating coal bed bottom plate karst water through hydraulic jetting and radial drilling | |
| WO2017198109A1 (en) | Pitshaft coal uncovering method for coal mines whose coal seam lies in main aquifer | |
| CN112746849B (en) | Shaft water-carrying digging and building method | |
| KR200460536Y1 (en) | Vacuum deep well drainage system for underground water level lowering method | |
| CN110748377B (en) | Gas and water double-extraction device in abandoned mine | |
| CN111764851A (en) | Reverse circulation hole washing device and method | |
| CN103104203A (en) | Drilling-fluid solid-control control process | |
| CN105672370B (en) | A kind of underground engineering water pressure control system | |
| CN207406342U (en) | A kind of filling system for the post processing of caisson wall wall | |
| CN108343408B (en) | Water-drive gas reservoir exploitation method | |
| CN105298443A (en) | Oil pipe float valve and blowout prevention, gas lift and fracture combined operation method for underbalance well completion oil pipe descending | |
| RU2398099C1 (en) | Method for well completion | |
| CN105804124B (en) | Underground engineering gushes hydraulic pressure control method with protrusion-dispelling | |
| CN104975610A (en) | Expanded-end decompression well, deep foundation pit structure and construction method for expanded-end decompression well | |
| JP2007009576A (en) | Excavated earth and sand exhausting device and shield device | |
| CN110644483B (en) | Bridge underwater pile foundation construction device | |
| CN106761499B (en) | Equipment for separating liquid from solid under artesian water earth-boring construction slurry dwell condition | |
| CN110425004B (en) | Suspension type guide device for paste filling underwater goaf and construction method | |
| RU2465405C2 (en) | Drainage method of open pit edges by means of systems of combined drainage devices |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |