CN212508227U - Open hole horizontal well subsection gravel packing device - Google Patents
Open hole horizontal well subsection gravel packing device Download PDFInfo
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- CN212508227U CN212508227U CN202120080309.1U CN202120080309U CN212508227U CN 212508227 U CN212508227 U CN 212508227U CN 202120080309 U CN202120080309 U CN 202120080309U CN 212508227 U CN212508227 U CN 212508227U
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Abstract
The utility model discloses a section gravel filling device of an open hole horizontal well, which relates to the technical field of oil well sand prevention, and comprises a well head casing pipe, a grading hoop, a well casing pipe, an oil pipe, a first sieve pipe, a second section filling tool, a second section service tool, a hydraulic packer, a second sieve pipe, a bottom service tool and a bottom filling tool, wherein the bottom filling tool, the second sieve pipe, the hydraulic packer, the second section filling tool, the first sieve pipe, the well casing pipe, the grading hoop and the well head casing pipe are fixedly connected from bottom to top in sequence; the two-section service tool and the bottom service tool are respectively connected with the two-section filling tool and the bottom filling tool in a sliding manner, and the oil pipe is connected with the two-section service tool and the bottom service tool in series; the device adopts the operation mode of completing gravel packing of the open hole horizontal well section by using a single string, shortens the completion construction period by times, and greatly reduces the labor intensity of workers; because the device reduces the construction steps, the construction cost of the related construction equipment matched with the device is also greatly reduced.
Description
Technical Field
The utility model relates to an oil well sand control technical field, concretely relates to bore hole horizontal well segmentation gravel packing device.
Background
At present, three service pipe columns are used for completing gravel packing operation aiming at an open hole horizontal well sectional packing mode, the operation mode not only increases the operation time, but also increases the operation cost, and the economic benefit is greatly influenced. At present, the first-section bottom filling tool in the market mostly adopts a sliding sleeve switch filling opening, but the structure is not suitable when open hole horizontal well filling is carried out in a subsection mode, and the defects that the switch is not in place, backwashing is inconvenient, gravel is easy to return during backwashing and the like easily occur.
Therefore, the development of a novel open hole horizontal well filling device is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a naked eye horizontal well segmentation gravel packing device to the defect that prior art exists.
The technical scheme of the utility model is that: the open hole horizontal well subsection gravel filling device comprises a well head casing, a grading hoop, a well down casing, an oil pipe, a first sieve pipe, a second section filling tool, a second section service tool, a hydraulic packer, a second sieve pipe, a bottom service tool and a bottom filling tool, wherein the bottom filling tool, the second sieve pipe, the hydraulic packer, the second section filling tool, the first sieve pipe, the well down casing, the grading hoop and the well head casing are fixedly connected from bottom to top in sequence; the two-section service tool and the bottom service tool are respectively connected with the two-section filling tool and the bottom filling tool in a sliding manner, and the oil pipe is connected with the two-section service tool and the bottom service tool in series;
the bottom filling tool comprises a joint, a valve sleeve, a valve barrel, a valve body, a sealing ring, a coupling, a short joint, a buckle changing joint, a leather cup sleeve, an outer filling pipe and a guide shoe, wherein the joint, the valve sleeve, the valve barrel, the valve body, the coupling, the short joint, the buckle changing joint, the outer filling pipe and the guide shoe are sequentially and fixedly connected from top to bottom; the sealing ring is arranged in the inner cavity of the valve body, and a pressing cap for fixing the sealing ring is fixedly arranged at the bottom of the inner cavity of the valve body; the outer filling pipe is provided with a plurality of filling holes, the opening of the leather cup is sleeved on the upper part of the outer filling pipe in an upward sliding manner, the upper part of the leather cup is sleeved on the outer side of the leather cup, and the lower end of the leather cup is fixedly connected with the outer wall of the outer filling pipe through a shearing pin; a plug used for sealing the filling hole is arranged in the inner cavity of the outer filling pipe, and the plug is fixedly connected with the outer filling pipe through a shearing pin; and a sand filter is arranged on the cavity wall at the lower end of the guide shoe.
Preferably, the lower end of the valve sleeve is also provided with sand blocking valves, and the two groups of sand blocking valves are arranged side by side.
Preferably, the sealing rings are provided with a plurality of groups and are arranged in parallel in the inner cavity of the valve body, and the sealing rings are lip type sealing rings.
Preferably, the hydraulic packer comprises a cylinder body and a packing service tool, the outer diameter of the packing service tool is matched with the inner diameter of the cylinder body, the packing service tool is slidably arranged in the inner cavity of the cylinder body, and a plurality of groups of sealing assemblies are arranged between the packing service tool and the cylinder body; a groove is formed in the outer wall of the middle of the packing service tool, and a constant-pressure check valve is arranged on the cylinder body opposite to the groove; a sealing rubber cylinder is arranged on the outer wall of the cylinder body on one side of the constant-pressure check valve, and the annular space between the sealing rubber cylinder and the cylinder body is communicated with the outlet of the constant-pressure check valve; the middle pipe wall of the packing service tool is provided with a plurality of setting holes, and sand filters are arranged in the setting holes.
Preferably, the constant-pressure check valve comprises a constant-pressure valve body and a valve core, two pipelines which are arranged in a staggered manner are arranged in the constant-pressure valve body, one pipeline is a conveying pipeline, and the other pipeline is a plugging pipeline; the inlet of the conveying pipeline is communicated with the groove, and the outlet of the conveying pipeline is communicated with the annular space between the sealing rubber cylinder and the cylinder body; the inlet of the plugging pipeline is communicated with the groove, the outlet end of the plugging pipeline is fixedly provided with a constant pressure cap, and an elastic retainer ring is arranged between the lower end of the constant pressure cap and the constant pressure valve body; the valve core is arranged in the plugging pipeline in a sliding mode, the top of the valve core is fixedly connected with the constant pressure cap through a shearing pin, and an annular groove communicated with the conveying pipeline is formed in the outer wall of the middle of the valve core; the steel ball, the spring and the outlet screw which are connected in sequence are arranged in the outlet of the conveying pipeline, and the outlet screw is fixedly arranged at the outlet end of the conveying pipeline and is internally provided with an axial through hole.
Preferably, a plurality of groups of O-shaped sealing rings are arranged on the outer wall of the valve core.
Preferably, the pipe walls of the two-section service tool and the packing service tool are both provided with interlayer channels.
Compared with the prior art, the utility model, have following advantage:
1) the device adopts the operation mode of completing gravel packing of the open hole horizontal well section by using a single string, shortens the completion construction period by times, and greatly reduces the labor intensity of workers; 2) because the device reduces the construction steps, the construction cost of the related construction equipment matched with the device is also greatly reduced; 3) the device has simple structure and simple and convenient operation, and the risk accident occurrence rate during construction is basically zero; 4) the built-in leather cup is arranged at the position of the outer filling pipe of the device, the structure can protect the leather cup from being abraded underground, can ensure that the filling hole is opened in time during filling operation, can be closed in time after the operation is finished, and effectively prevents sand from being spit back during backwashing; 5) the constant pressure check valve in the device ensures that the hydraulic packer is not influenced by the pressure and the size in the packing service tool once the hydraulic packer is completely set under the set pressure value.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the bottom filling tool;
FIG. 3 is a schematic diagram of a bottom service tool configuration;
FIG. 4 is a view of the bottom filling tool in operation;
FIG. 5 is a view showing a state in which the bottom filling tool is filled;
FIG. 6 is a schematic structural diagram of a hydraulic packer;
FIG. 7 is a diagram illustrating the operation of a constant pressure check valve;
FIG. 8 is a state diagram after the constant pressure check valve is plugged;
FIG. 9 is a schematic cross-sectional view of a sandwich channel.
In the figure: 1. wellhead casing, 2, grading collar, 3, downhole casing, 4, tubing, 5, first screen, 6, two-stage packing tool, 7, two-stage service tool, 8, hydraulic packer, 801, cylinder, 9, second screen, 10, bottom service tool, 11, bottom packing tool, 12, joint, 13, valve housing, 14, valve cartridge, 15, valve body, 16, seal ring, 17, coupling, 18, short joint, 19, change joint, 20, cup, 21, cup housing, 22, outer packing tube, 2201, valve bore, 23, guide shoe, 24, sand stop valve, 2401, valve seat, 2402, valve plate, 25, gland, 26, plug, 27, sand filter, 28, packing service tool, 2801, groove, 29, seal assembly, 30, constant pressure check valve, 31, seal rubber cartridge, 32, constant pressure valve body, 3201, delivery line, 3202, plugging line, 33, valve core, 3301, annular groove, 34. the device comprises a constant pressure cap 35, an elastic retainer ring 36, a steel ball 37, a spring 38, an outlet screw 39, an O-shaped sealing ring 40 and a sandwich channel.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Example one
Referring to fig. 1-5, the open hole horizontal well segmented gravel filling device comprises a wellhead casing 1, a grading hoop 2, a downhole casing 3, an oil pipe 4, a first sieve pipe 5, a second-section filling tool 6, a second-section service tool 7, a hydraulic packer 8, a second sieve pipe 9, a bottom service tool 10 and a bottom filling tool 11, wherein the bottom filling tool 11, the second sieve pipe 9, the hydraulic packer 8, the second-section filling tool 6, the first sieve pipe 5, the downhole casing 3, the grading hoop 2 and the wellhead casing 1 are fixedly connected in sequence from bottom to top; the two-section service tool 7 and the bottom service tool 10 are respectively connected with the two-section filling tool 6 and the bottom filling tool 11 in a sliding mode, and the oil pipe 4 is connected with the two-section service tool 7 and the bottom service tool 10 in series;
the bottom filling tool 11 comprises a joint 12, a valve sleeve 13, a valve barrel 14, a valve body 15, a sealing ring 16, a coupling 17, a short joint 18, a variable buckle joint 19, a leather cup 20, a leather cup sleeve 21, an outer filling pipe 22 and a guide shoe 23, wherein the joint 12, the valve sleeve 13, the valve barrel 14, the valve body 15, the coupling 17, the short joint 18, the variable buckle joint 19, the outer filling pipe 22 and the guide shoe 23 are fixedly connected from top to bottom in sequence, a sand blocking valve 24 is arranged at the lower end of the joint 12, the sand blocking valve 24 comprises a valve seat 2401 and a valve plate 2402, the valve seat 2401 is fixedly arranged at the lower end of the joint 12, one end of the valve plate 2402 is rotatably connected with the valve seat; the sealing ring 16 is arranged in the inner cavity of the valve body 15, and the bottom of the inner cavity of the valve body 15 is fixedly provided with a pressing cap 25 for fixing the sealing ring 16; the outer filling pipe 22 is provided with a plurality of filling holes 2201, the opening of the leather cup 20 is sleeved on the upper part of the outer filling pipe 22 in an upward sliding manner, the upper part of the leather cup sleeve 21 is sleeved on the outer side of the leather cup 20, and the lower end of the leather cup sleeve is fixedly connected with the outer wall of the outer filling pipe 22 through a shearing pin; a plug 26 for sealing the filling hole 2201 is arranged in the inner cavity of the outer filling pipe 22, and the plug 26 is fixedly connected with the outer filling pipe 22 through a shearing pin; the sand filter 27 is additionally arranged on the cavity wall at the lower end of the guide shoe 23, so that a clean space without silt and dirt is formed at the front end of the plug 26, the plug 26 is not blocked when pushed by pressure, and redundant liquid can be discharged in time to open the filling hole 2201.
In more detail, in order to provide the sand-blocking effect of the bottom filling tool 11, the lower end of the valve housing 13 is also provided with a sand-blocking valve 24, and the two sets of sand-blocking valves 24 are arranged side by side; when the bottom service tool 10 is inserted, the valve plate 2402 is opened, a backwashing channel is formed during backwashing, and after the bottom service tool 10 is pumped out after filling operation is completed, the valve plate 2402 is automatically closed, so that sand is blocked from entering the screen sleeve, and the quality of crude oil in the later period is ensured.
In more detail, referring to fig. 4, a plurality of groups of sealing rings 16 arranged in parallel are arranged in the inner cavity of the valve body 15, and the sealing rings 16 are lip-type sealing rings 16; therefore, under the sealing action of the multiple groups of lip type sealing rings 16, the bottom filling tool 11 can ensure absolute sealing during high-pressure filling, the mixture of sand and liquid cannot flow reversely, and a water passing channel can be formed during backwashing, so that residual sand can be washed away.
The utility model discloses a construction steps does:
(1) a bottom filling tool 11, a second sieve tube 9, a hydraulic packer 8, a two-section filling tool 6, a first sieve tube 5, a downhole casing 3, a grading hoop 2 and a wellhead casing 1 are respectively connected in sequence and are gradually put into a well to be in place, and the measured lengths of the tools and the casings need to be accurately recorded before the tools and the casings are put into the well to be used as the basis for later operation;
(2) injecting the mixed cement into the grading hoop 2 from the wellhead casing 1 by using a pump truck, and returning the cement to the ground from the grading hoop to wait for the cement to be solidified;
(3) after the cement is completely solidified, removing impurities in the sleeve by using a special cleaning tool to ensure that the sleeve is smooth and has no impurities;
(4) accurately measuring the lengths of the bottom service tool 10 and the second-stage service tool 7, then measuring and calculating the length of the configured oil pipe 4 and matching the length of the step (1);
(5) sequentially connecting the measured tools and the oil pipe 4 into a string and putting the string in place, pressurizing for 10t, and connecting ground construction equipment;
(6) confirming that the connection is correct, firstly performing backwashing for a period of time, then performing positive pressure pumping, gradually pressurizing in a segmented manner, when the pressure reaches 18MPa, keeping the pressure for a period of time without pressure drop after stopping the pump, then continuing to start the pump to about 20MPa, and reducing the pressure to zero, which indicates that the filling hole 2201 of the bottom filling tool 11 is opened;
(7) the filling hole 2201 is opened and then positively flushed for a period of time, sand can be added for filling after backwater is normal, sand is continuously and uniformly added for a period of time, when the sand amount is found to be close to the set amount, the reading of the pressure gauge is continuously increased and is just close to the preset value, the sand adding can be stopped at the moment, and the water pumping and the replacement can be stopped until the preset pressure value is reached;
(8) immediately switching to a backwashing mode quickly to clean residual sand in the service pipe column;
(9) following the completion of bottom filling, a second stage of filling preparation is carried out;
(10) and (3) adding a steel ball 36, continuously positively pressurizing to about 12MPa, suddenly releasing the pressure, opening a second filling port, continuously starting a pump, positively flushing for a period of time, returning water to be normal, and then uniformly adding sand. It should be noted that: if the pressure exceeds 15-18MPa, the pressure is not released, the pressurizing is stopped and the pressure is released to zero, and the pipe column is lifted for 1.5-2 m and the pressurizing is continued; after the filling opening is opened, lowering the pipe column to the original state;
(11) the filling process is the same as the step 7;
(12) after the mode is switched to the backwashing mode quickly, in order to prevent the influence of the steel ball 36 and the overlong backwashing channel, the pipe column is lifted for 1.5 to 2 meters to carry out backwashing on residual sand in the pipe column. And when no sand flows out of the outlet, stopping the pump to release the pressure, dismounting the pipeline joint 12, lifting the oil pipe 4 and the service tool one by one, and finishing the sectional filling.
The device adopts the operation mode of completing gravel packing of the open hole horizontal well section by using a single string, shortens the completion construction period by times, and greatly reduces the labor intensity of workers; because the device reduces the construction steps, the construction cost of the related construction equipment matched with the device is also greatly reduced; the device has simple structure and simple and convenient operation, and the risk accident occurrence rate during construction is basically zero; the built-in leather cup 20 is arranged at the position of the outer filling pipe 22 of the device, the structure can protect the leather cup 20 from being abraded in the underground, can ensure that the filling hole 2201 can be opened in time during filling operation and closed in time after the operation is finished, and effectively prevents sand from being spit back during backwashing.
Example two
As an embodiment of the present invention, the structure of the hydraulic packer 8 is optimized on the basis of the first embodiment, specifically as follows: referring to fig. 6, the hydraulic packer 8 in the embodiment comprises a cylinder 801 and a packing service tool 28, wherein the outer diameter of the packing service tool 28 is matched with the inner diameter of the cylinder 801, the packing service tool 28 is slidably arranged in the inner cavity of the cylinder 801, and a plurality of groups of sealing assemblies 29 are arranged between the packing service tool 28 and the cylinder 801; a groove 2801 is arranged on the outer wall of the middle part of the packing service tool 28, and a constant pressure check valve 30 is arranged on the cylinder 801 opposite to the groove 2801; a sealing rubber cylinder 31 is arranged on the outer wall of the cylinder body 801 on one side of the constant-pressure check valve 30, and the annular space between the sealing rubber cylinder 31 and the cylinder body 801 is communicated with the outlet of the constant-pressure check valve 30; the middle pipe wall of the packing service tool 28 is provided with a plurality of setting holes, and sand filters 27 are arranged in the setting holes.
Referring to fig. 9, the pipe walls of the two-stage service tool 7 and the packing service tool 28 are provided with interlayer channels 40, so that an internal and external circulation path is established, and the gravel packing work is ensured to be carried out smoothly.
The hydraulic packer 8 in this embodiment works: at the same time when the bottom filling tool 11 opens the filling hole 2201, high-pressure liquid also enters the annular space between the sealing rubber cylinder 31 and the cylinder body 801 from the constant-pressure check valve 30 through the sand filter 27 on the packing service tool 28, so that the sealing rubber cylinder 31 starts to expand under pressure until the well wall is completely sealed; the purpose of setting the sand screen 27 in the setting hole of the packer service tool 28 is: sand is not allowed to flow outside of the packing service tool 28 during the packing process, preventing the string from sticking and causing a completion failure.
Implementation III
As a preferred embodiment of the present invention, the structure of the constant pressure check valve 30 is optimized on the basis of the second embodiment, specifically: the constant pressure check valve 30 comprises a constant pressure valve body 32 and a valve core 33, two pipelines which are arranged in a staggered mode are arranged in the constant pressure valve body 32, one pipeline is a conveying pipeline 3201, and the other pipeline is a plugging pipeline 3202; an inlet of the conveying pipeline 3201 is communicated with the groove 2801, and an outlet is communicated with the sealing rubber cylinder 31 and the annular space of the cylinder body 801; an inlet of the plugging pipeline 3202 is communicated with the groove 2801, an outlet end is fixedly provided with a constant pressure cap 34, and an elastic retainer ring 35 is arranged between the lower end of the constant pressure cap 34 and the constant pressure valve body 32; the valve core 33 is arranged in the blocking pipeline 3202 in a sliding manner, the top of the valve core is fixedly connected with the constant pressure cap 34 through a shearing pin, and the outer wall of the middle part of the valve core 33 is provided with an annular groove 3301 communicated with the conveying pipeline 3201; in more detail, in order to improve the sealing effect of the valve core 33, a plurality of groups of O-shaped sealing rings 39 are arranged on the outer wall of the valve core 33; the steel ball 36, the spring 37 and the outlet screw 38 which are connected in sequence are arranged in the outlet of the conveying pipeline 3201, the outlet screw 38 is fixedly arranged at the outlet end of the conveying pipeline 3201, and an axial through hole is formed in the outlet screw.
The working principle of the constant-pressure check valve 30 in the embodiment is as follows: referring to fig. 7-8, fig. 7 shows that in the unset state of the hydraulic packer 8, high-pressure liquid enters from the inlets of the delivery line 3201 and the blocking line 3202, respectively, the liquid entering from the delivery line 3201 passes through the annular groove 3301 of the valve element 33, pushes the steel ball 36 and enters the annular space between the packing rubber cylinder 31 and the cylinder 801 through the outlet screw 38, so that the packing rubber cylinder 31 expands outwards to seal with the well wall; meanwhile, the liquid pressure at the inlet of the blocking pipeline 3202 acts on the lower end face of the valve core 33, and when the pressure reaches a certain value, the valve core 33 shears the shear pin to move upwards. Referring now to the state of FIG. 8, the transfer 3201 and blocking 3202 are not in communication and the spool 33 is also locked in place by the circlip 35 so that the hydraulic packer 8 is not affected by the presence or absence or magnitude of the internal pressure in the service string.
The constant pressure check valve 30 in this embodiment allows the hydraulic packer 8 to be fully set at a set pressure value, once it is no longer affected by the presence or absence, or magnitude, of pressure within the packing service tool 28.
The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge range of those skilled in the art without departing from the spirit of the present invention, and the changed contents still belong to the protection scope of the present invention.
Claims (7)
1. The utility model provides an open hole horizontal well segmentation gravel packing device which characterized in that: the device comprises a wellhead casing, a grading hoop, an underground casing, an oil pipe, a first sieve pipe, a second-section filling tool, a second-section service tool, a hydraulic packer, a second sieve pipe, a bottom service tool and a bottom filling tool, wherein the bottom filling tool, the second sieve pipe, the hydraulic packer, the second-section filling tool, the first sieve pipe, the underground casing, the grading hoop and the wellhead casing are fixedly connected in sequence from bottom to top; the two-section service tool and the bottom service tool are respectively connected with the two-section filling tool and the bottom filling tool in a sliding manner, and the oil pipe is connected with the two-section service tool and the bottom service tool in series;
the bottom filling tool comprises a joint, a valve sleeve, a valve barrel, a valve body, a sealing ring, a coupling, a short joint, a buckle changing joint, a leather cup sleeve, an outer filling pipe and a guide shoe, wherein the joint, the valve sleeve, the valve barrel, the valve body, the coupling, the short joint, the buckle changing joint, the outer filling pipe and the guide shoe are sequentially and fixedly connected from top to bottom; the sealing ring is arranged in the inner cavity of the valve body, and a pressing cap for fixing the sealing ring is fixedly arranged at the bottom of the inner cavity of the valve body; the outer filling pipe is provided with a plurality of filling holes, the opening of the leather cup is sleeved on the upper part of the outer filling pipe in an upward sliding manner, the upper part of the leather cup is sleeved on the outer side of the leather cup, and the lower end of the leather cup is fixedly connected with the outer wall of the outer filling pipe through a shearing pin; a plug used for sealing the filling hole is arranged in the inner cavity of the outer filling pipe, and the plug is fixedly connected with the outer filling pipe through a shearing pin; and a sand filter is arranged on the cavity wall at the lower end of the guide shoe.
2. The open-hole horizontal well segmented gravel packing apparatus of claim 1, wherein: the lower end of the valve sleeve is also provided with sand blocking valves, and the two groups of sand blocking valves are arranged side by side.
3. The open-hole horizontal well segmented gravel packing apparatus of claim 1, wherein: the sealing rings are provided with a plurality of groups and are arranged in parallel in the inner cavity of the valve body, and the sealing rings are lip type sealing rings.
4. The open-hole horizontal well segmented gravel packing apparatus of claim 1, wherein: the hydraulic packer comprises a cylinder body and a packing service tool, the outer diameter of the packing service tool is matched with the inner diameter of the cylinder body, the packing service tool is slidably arranged in the inner cavity of the cylinder body, and a plurality of groups of sealing assemblies are arranged between the packing service tool and the cylinder body; a groove is formed in the outer wall of the middle of the packing service tool, and a constant-pressure check valve is arranged on the cylinder body opposite to the groove; a sealing rubber cylinder is arranged on the outer wall of the cylinder body on one side of the constant-pressure check valve, and the annular space between the sealing rubber cylinder and the cylinder body is communicated with the outlet of the constant-pressure check valve; the middle pipe wall of the packing service tool is provided with a plurality of setting holes, and sand filters are arranged in the setting holes.
5. The open-hole horizontal well segmented gravel packing apparatus of claim 4, wherein: the constant-pressure check valve comprises a constant-pressure valve body and a valve core, wherein two pipelines which are arranged in a staggered mode are arranged in the constant-pressure valve body, one pipeline is a conveying pipeline, and the other pipeline is a plugging pipeline; the inlet of the conveying pipeline is communicated with the groove, and the outlet of the conveying pipeline is communicated with the annular space between the sealing rubber cylinder and the cylinder body; the inlet of the plugging pipeline is communicated with the groove, the outlet end of the plugging pipeline is fixedly provided with a constant pressure cap, and an elastic retainer ring is arranged between the lower end of the constant pressure cap and the constant pressure valve body; the valve core is arranged in the plugging pipeline in a sliding mode, the top of the valve core is fixedly connected with the constant pressure cap through a shearing pin, and an annular groove communicated with the conveying pipeline is formed in the outer wall of the middle of the valve core; the steel ball, the spring and the outlet screw which are connected in sequence are arranged in the outlet of the conveying pipeline, and the outlet screw is fixedly arranged at the outlet end of the conveying pipeline and is internally provided with an axial through hole.
6. The open-hole horizontal well segmented gravel packing apparatus of claim 5, wherein: and a plurality of groups of O-shaped sealing rings are arranged on the outer wall of the valve core.
7. The open-hole horizontal well segmented gravel packing apparatus of claim 4, wherein: and the pipe walls of the two-section service tool and the packing service tool are provided with interlayer channels.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120080309.1U CN212508227U (en) | 2021-01-13 | 2021-01-13 | Open hole horizontal well subsection gravel packing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120080309.1U CN212508227U (en) | 2021-01-13 | 2021-01-13 | Open hole horizontal well subsection gravel packing device |
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| CN212508227U true CN212508227U (en) | 2021-02-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113482564A (en) * | 2021-08-12 | 2021-10-08 | 四川大学 | Combination valve for coring device and pressure-maintaining coring device |
| CN113530484A (en) * | 2021-08-12 | 2021-10-22 | 深圳大学 | Reactant storage device, freezing and cooling device and pressure-maintaining coring device |
-
2021
- 2021-01-13 CN CN202120080309.1U patent/CN212508227U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113482564A (en) * | 2021-08-12 | 2021-10-08 | 四川大学 | Combination valve for coring device and pressure-maintaining coring device |
| CN113530484A (en) * | 2021-08-12 | 2021-10-22 | 深圳大学 | Reactant storage device, freezing and cooling device and pressure-maintaining coring device |
| CN113482564B (en) * | 2021-08-12 | 2023-03-10 | 四川大学 | Combination valve for coring device and pressure-maintaining coring device |
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