CN104695914B - High-pressure packing sand-control tubing string is segmented in horizontal well tube - Google Patents
High-pressure packing sand-control tubing string is segmented in horizontal well tube Download PDFInfo
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- CN104695914B CN104695914B CN201310656621.0A CN201310656621A CN104695914B CN 104695914 B CN104695914 B CN 104695914B CN 201310656621 A CN201310656621 A CN 201310656621A CN 104695914 B CN104695914 B CN 104695914B
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- high pressure
- outside
- connecting tube
- liquid stream
- pipe
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
Abstract
The invention discloses high-pressure packing sand-control tubing string is segmented in horizontal well tube, including suspension sub-releasing device, connecting tube, unit is filled outside high pressure, play pressure device, liquid stream conversion equipment, stratum-annular pack switching mechanism, bottom silk plug, the suspension sub-releasing device mainly includes setting releasing gadget, the setting releasing gadget is arranged on the outside of upper end of connecting tube, the connecting tube rear end connects liquid stream conversion equipment, liquid stream conversion equipment rear end connects stratum-annular pack switching mechanism, pressure device has been provided in the connecting tube, unit empty set is filled outside the high pressure in the connecting tube being sequentially connected, play pressure device, liquid stream conversion equipment, stratum-annular pack switching mechanism outside, unit front end outer side is filled outside the high pressure is cased with front suspension packer, bottom silk plug is then arranged in rear end.The present invention realizes horizontal well fine development, uniformly produces liquid, gives full play to horizontal productivity, delays to enter high water-cut stage too early, extends the sand control horizontal well service life.
Description
Technical field
The present invention relates to oil exploitation underground work pipe columns, and high-pressure packing sand-control pipe is specifically segmented in horizontal well tube
Column.
Background technique
As horizontal well technology is applied on a large scale in loose sand oil accumulation, it is more multiple that Horizontal Well Drilling meets Oil Reservoir Types
Miscellaneous, well section is longer, often occurs non-mean value oil reservoir, mud stone, dried layer, gas-bearing formation or high aquifer formation etc. in drilling strata, for this
Class well, setting of casing well cementation, then selective perforating carries out having distinguished well being mining method the most scientific, this is to horizontal well sand control
Technical requirements are higher.General extension sand screen or the general gravel stower of full pit shaft are usually used for horizontal well sand control at present
Skill is not segmented the technology of packing difference filling, it is difficult to give full play to the yield heterosis of long well section horizontal wells；Even for
Compared with the horizontal well Homogeneous Reservoir of long well section, it is a bit of that general huge discharge back-up sand can only not enter certain controlledly yet, and squeezes
The risk of neighbouring water layer targetedly cannot carry out segmentation difference transformation to entire stratum and sand control is constructed, still more stratum
Complicated heterogeneous reservoir, this is that Horizontal Wells in Loose Sand Reservoirs develops the problem faced.
Summary of the invention
The purpose of the present invention is to provide high-pressure packing sand-control tubing string is segmented in horizontal well tube, one-trip string completes multiple layers
The segmentation stratum of section squeezes, stages cycle fills, and ensures between each section independently of each other, not interfereing with each other, to reach best water
Horizontal well is segmented sand control production effect, realizes horizontal well fine development, uniformly produces liquid, give full play to horizontal productivity, delays too early
Into high water-cut stage, extend the sand control horizontal well service life.
In order to achieve the above objectives, present invention employs following technical solution, horizontal well tube is interior to be segmented high-pressure packing sand-control
Unit, pressure device, liquid stream conversion equipment, stratum-annular space is filled outside tubing string, including suspension sub-releasing device, connecting tube, high pressure to fill
Switching mechanism, bottom silk plug are filled out, the suspension sub-releasing device mainly includes setting releasing gadget, the setting releasing gadget setting
On the outside of upper end of connecting tube, the connecting tube rear end connects liquid stream conversion equipment, and liquid stream conversion equipment rear end connects stratum-
Annular pack switching mechanism, in the connecting tube and liquid stream conversion equipment front position have been provided with pressure device, outside the high pressure
Unit empty set is filled in the connecting tube being sequentially connected, pressure device, liquid stream conversion equipment, stratum-annular pack switching mechanism
Outside simultaneously forms annular space between each other, and unit front end outer side is filled outside the high pressure and is cased with front suspension packer, rear end is then
Bottom silk plug is set, is arranged in the high pressure being connected to connecting tube on the liquid stream conversion equipment and fills mouth, filled outside the high pressure
It is provided on unit outside the high pressure being used cooperatively corresponding with mouth is filled in high pressure and fills mouth.
Unit is filled outside the high pressure and is at least arranged two sets, and unit is separated with Inter-zonal packing device between any two, it is described
It includes high pressure packing outer tube, outer filling set, one-way piston, spring, interstage sleeve, sand control pipe, the height that unit is filled outside high pressure
Pressure filling outer tube, which opens up to fill outside the high pressure, is cased with one-way piston on the outside of mouth and herein filling mouth, and one-way piston front end outer side is set
Outer filling set is set, one-way piston rear is provided with the interstage sleeve covered on high pressure packing outer tube, between the one-way piston and interstage sleeve
Spring is installed, the interstage sleeve rear is provided with the sand control pipe covered on high pressure packing outer tube.
The high pressure packing outer tube is equipped with the boss for positioning outer filling set, and outer filling set, which is connected through a screw thread, to be covered
Outside outer filling mouth on high pressure packing outer tube, outer filling set lower end is designed as inclined-plane, and the upper outside of one-way piston is also configured as
Respective ramp.
Described pressure device includes sealing ring, cuts pin, plays pressure head, and described pressure head is fixed on company by cutting pin
Nozzle interior, sealing ring setting is in connection pipe outer wall and seals up and cuts pin outer fix, the connecting tube bottom end without
Through-hole is blind plugging structure, and break pin is fixed when by larger hydraulic from ground is cut, and plays a pressure head and falls on connecting tube bottom end；
The connecting tube is connected to filling mouth in the high pressure for being equipped with Kong Bingyu liquid stream conversion equipment between pressure device is played.
The liquid stream conversion equipment includes interior crossover connection and external conversion pipe, and the interior crossover connection is located in external conversion pipe upper end
Side, uniformly distributed 2 raised lines on interior crossover connection form liquid stream between remaining part and external conversion pipe in addition to raised line on interior crossover connection
Slot is equipped with radial through-hole in raised line, and external conversion pipe is connect by welding manner with interior crossover connection, and external conversion pipe is in above-mentioned interior conversion
The radial through-hole corresponding position of pipe also opens up hole, and the corresponding formation in the hole on the connecting tube, interior crossover connection and external conversion pipe is high
Mouth is filled in pressure.
The stratum-annular pack switching mechanism includes circulating sleeve, slip pipe, leather cup, self-styled seat, and the circulating sleeve is equipped with
2 uniformly distributed circulation ports, the slip pipe, which is covered, seals 2 circulation ports in the outside of circulating sleeve, the slip pipe lower part and self-styled seat
It is threadedly coupled, the leather cup is arranged on the outside of the slip pipe above self-styled seat, and self-styled seat supports leather cup keeps leather cup opening direction facing forward.
There are annular grooves behind the screw thread connecting in the self-styled seat with slip pipe, and annular groove is interior for installing self-locking ring, follow
It is cased with baffle ring outside ring set bottom, anti-rotation pin is provided between the self-styled seat and slip pipe.
Compared to the prior art, the invention has the following advantages:
The tubing string includes suspension sub-releasing device, unit is filled outside high pressure, sand control pipe, Inter-zonal packing device, is filled in high pressure
Assembly, stratum-annular pack switching mechanism composition are filled out, it is every to increase a segmentation, increase that unit, oil reservoir are filled outside a set of high pressure is anti-
Sandpipe, Inter-zonal packing.Sand flow body is taken in tubing string, oil is completed in the cooperation by filling assembly in unit and high pressure outside high pressure
The a certain range of high pressure packing in well stratum, then under stratum-annular pack switching mechanism transformation complete sand-proof pipe and
Gravel filling between production string, the segmentation stratum that one-trip string completes multiple intervals squeezes, stages cycle fills.
One-trip string of the present invention completes the multiple segmentation stratum extruding of long well section horizontal well, stages cycle filling；And ensure each
It is mutually indepedent between section, it does not interfere with each other, to reach optimum level well segmentation sand control production effect, realizes that horizontal well is finely opened
Hair, uniformly produces liquid, gives full play to horizontal productivity, delay to enter high water-cut stage too early, extends the sand control horizontal well service life.Without throwing
Ball completes horizontal segment packer setting, realizes the function that Inter-zonal packing, oil jacket annulus sealing and sand control pipe are given up, safety
Reliably；High pressure packing unit flexibility and reliability, it is ensured that the implementation of each section of stratum squeeze pack transformation sand control；Stratum-annular pack
Switching mechanism directly carries out flow pack after realizing stratum high pressure packing, ensure that the compaction rate of screen jacket annular pack.
Detailed description of the invention
Fig. 1 is that high-pressure packing sand-control tubular column structure schematic diagram is segmented in horizontal well tube of the invention；
Fig. 2 is the structural schematic diagram of front half section of the present invention；
Fig. 3 is the structural schematic diagram of second half section of the invention.
In figure: filling unit 4, high pressure outside suspension sub-releasing device 1, setting releasing gadget 2, front suspension packer 3, high pressure
Outer tube 5, outer filling set 6, one-way piston 7, spring 8, interstage sleeve 9, sand control pipe 10, Inter-zonal packing 11, high pressure is filled to fill outside
Unit 12, outer filling set 13, sealing ring 14, one-way piston 15, rise pressure device 16, cut pin 17, rise pressure head 18, spring 19,
Interstage sleeve 20, liquid stream conversion equipment 21, connecting tube 22, interior crossover connection 23, external conversion pipe 24, sand control pipe 25, stratum-annular space fill
Fill out switching mechanism 26, circulating sleeve 27, slip pipe 28, leather cup 29, self-styled seat 30, anti-rotation pin 31, self-locking ring 32, baffle ring 33, bottom
Silk plug 34.
Specific embodiment
Detailed description for the present invention and technology contents, cooperation Detailed description of the invention it is as follows, however attached drawing only provides reference with
Purposes of discussion is not intended to limit the present invention.
Referring to attached drawing 1-3, high-pressure packing sand-control tubing string is segmented in horizontal well tube, mainly by suspension sub-releasing device 1, high pressure outside
It fills unit 4, sand control pipe 10, Inter-zonal packing device 11, play pressure device 16, liquid stream conversion equipment 21, stratum-annular pack turn
Change planes structure 26 and bottom silk plug 34 forms, every to increase a segmentation, increase filled outside a set of high pressure unit 4, sand control pipe 10,
Inter-zonal packing device 11.(being introduced for being divided to two sections for long well section horizontal well below).
Suspension sub-releasing device 1 includes setting releasing gadget 2 and front suspension packer 3.Setting releasing gadget 2 and a press fitting
Set 16, liquid stream conversion equipment 21, stratum-annular pack switching mechanism 26 connects；Front suspension packer 3 is sequentially connected leading portion height
The outer filling unit 4 of pressure, leading portion sand control pipe 10, Inter-zonal packing device 11, back segment high pressure fill unit 12, back segment sand control outside
Pipe 25 and bottom silk plug 34.
Setting releasing gadget 2 is connected by connecting tube 22 with pressure device 16 and liquid stream conversion equipment 21, and pressure device 16 is played
Including playing a pressure head 18, sealing ring 14 and to cut pin 17(4 uniformly distributed), 22 bottom end of connecting tube is blind plugging structure without through-hole, when by
Break pin fixed 17 is cut when to larger hydraulic from ground, is played a pressure head 18 and is fallen on 22 bottom end of connecting tube；22 bottom end of connecting tube
It is equipped with 2 uniformly distributed holes between pressure device 16 with rising, is cooperatively formed with liquid stream conversion equipment 21 and fills mouth in high pressure, liquid stream conversion
Device 21 includes interior crossover connection 23 and external conversion pipe 24, uniformly distributed 2 raised lines on interior crossover connection 23, on interior crossover connection 23 in addition to raised line
Form spout between remaining part and external conversion pipe 24, be equipped with radial through-hole in raised line, external conversion pipe 24 by welding with
Interior crossover connection 23 connects, and is evenly distributed with 2 holes, connecting tube 22, interior crossover connection 23 and external conversion pipe 24 in radial through-hole corresponding position
On the corresponding formation high pressure in hole in fill mouth.
24 bottom end of external conversion pipe of liquid stream conversion equipment 21 is connected with stratum-annular pack switching mechanism 26, stratum-ring
Sky filling switching mechanism 26 includes circulating sleeve 27, slip pipe 28, leather cup 29, self-styled seat 30, anti-rotation pin 31, self-locking ring 32 and baffle ring
33, circulating sleeve 27 is equipped with 2 uniformly distributed circulation ports, and 28 sets of the slip pipe outsides in circulating sleeve 27 seal 2 circulation ports, slip pipe
28 lower parts are threadedly coupled with self-styled seat 30, and self-styled seat 30 supports leather cup 29 to keep its opening direction facing forward, in self-styled seat 30 and slip pipe
There are annular grooves behind the screw thread of 28 connections, and for installing self-locking ring 32,27 bottom of circulating sleeve baffle ring 33 between is threadedly coupled.
3 rear end of front suspension packer is connected with filling unit 4 outside leading portion high pressure, fills outside structure and back segment high pressure
Unit 12 it is identical, including high pressure packing outer tube 5, outer filling set 6 (filling 13 in unit 12 outside back segment high pressure), one-way piston
(back segment is high for 7 (15 in unit 12 are filled outside back segment high pressure), spring 8 (19 in unit 12 are filled outside back segment high pressure) and interstage sleeve 9
20 in the outer filling unit 12 of pressure) composition, high pressure packing outer tube are equipped with boss used for positioning and 4 uniformly distributed outer fillings
Mouthful.Outer filling set 6 is connected through a screw thread outside the outer filling mouth covered on high pressure packing outer tube 5, and lower end is designed as inclined-plane, single
It is designed as respective ramp to the upper outside of piston 7, the inclined-plane of outer filling set 6 is abutted against under the action of spring 8, spring 8
Lower end design interstage sleeve 9 limits its axial movement.
The present invention by following operation sequence at the scene in use, carried out:
It connects high-pressure packing sand-control tubing string is segmented in horizontal well tube by the order illustrated of Fig. 2 to Fig. 3, is set in lower going-into-well
Position is counted, is beaten from oil pipe hydraulic, makes the setting suspension of front suspension packer 3 of suspension sub-releasing device 1, continues to increase pressure,
Cutting pin 17 in pressure device 16 disconnects, and plays 18 downlink of pressure head and falls on 22 bottom end of connecting tube, rotates forward tubing string for setting loss mobile phone
Structure 2 and front suspension packer 3 separate, and above mention setting releasing gadget 2 and connected to it pressure device 16, liquid stream conversion equipment
21, stratum-annular pack switching mechanism 26 encounters Inter-zonal packing device 11 to 24 top of external conversion pipe of liquid stream conversion equipment 21
After positioning convex platform, continuation is beaten hydraulic from oil pipe, and liquid keeps Inter-zonal packing device 11 setting by filling mouth in high pressure, and long well section is oily
The interval packing of layer front and back is opened.Decentralization tubing string encounters 24 top of external conversion pipe of liquid stream conversion equipment 21 to fill list outside back segment high pressure
First 12 posterior segment positioning convex platforms, the interior filling mouth of high pressure are aligned with filling mouth outside back segment high pressure, are pumped into from oil pipe huge discharge and take sand flow
Body takes sand flow body to by high pressure is inside and outside and fills mouth, pushes row after 15 compressed spring 19 of one-way piston, high pressure packing channel is complete
It opens, takes sand flow body and enter stratum, implement stratum high pressure packing.
Then movable tubing string, cuts the anti-rotation pin 31 in stratum-annular pack switching mechanism 26, slip pipe 28, leather cup 29
It retreats the circulation port to the front end of baffle ring 33, on circulating sleeve 27 with self-styled seat 30 to open, upper lifting pipe post to liquid stream conversion equipment 21
24 top of external conversion pipe encounter and fill 12 posterior segment positioning convex platform of unit outside back segment high pressure, filling mouth and back segment high pressure in high pressure
Outer filling mouth alignment, is pumped into from oil pipe small displacement and takes sand flow body, fluid enters back segment sand control pipe 25 and formed with production string
Annular space, pack gravel is deposited on the periphery of back segment sand control pipe 25, and liquid enters in tubing string by sand-proof pipe, by following
Circulation port on ring set 27, since the pressure head 18 that rises risen in pressure device 16 has fallen on connecting tube 22 before the high pressure packing of stratum
Bottom end, returning fluid, which by the circulation of 21 upper liquid of liquid stream conversion equipment changes slot and enters after connecting tube 22, directly returns to well head, completes back segment
Flow pack.
Tubing string is equally above mentioned to the stratum extruding that leading portion is completed to leading portion and circulating gravel packing.
The foregoing is merely presently preferred embodiments of the present invention, non-to limit the scope of the patents of the invention, other are with this
The equivalence changes of the patent spirit of invention should all belong to the scope of the patents of the invention.
Claims (1)
1. being segmented high-pressure packing sand-control tubing string in horizontal well tube, which is characterized in that including suspension sub-releasing device, connecting tube, high pressure
Outer filling unit plays pressure device, liquid stream conversion equipment, stratum-annular pack switching mechanism, bottom silk plug, the suspension sub-releasing
Device mainly includes setting releasing gadget, and the setting releasing gadget is arranged on the outside of upper end of connecting tube, the connecting tube rear end
Connect liquid stream conversion equipment, liquid stream conversion equipment rear end connects stratum-annular pack switching mechanism, in the connecting tube and
Liquid stream conversion equipment front position has been provided with pressure device, filled outside the high pressure unit empty set the connecting tube being sequentially connected,
It plays pressure device, liquid stream conversion equipment, stratum-annular pack switching mechanism outside and forms annular space between each other, the high pressure
Outer filling unit front end outer side is cased with front suspension packer, and rear end is then arranged bottom silk plug, on the liquid stream conversion equipment
Be arranged in the high pressure that is connected to connecting tube and fill mouth, filled outside the high pressure be provided on unit it is corresponding with mouth is filled in high pressure
Mouth is filled outside the high pressure being used cooperatively；
Unit is filled outside the high pressure and is at least arranged two sets, and unit is separated with Inter-zonal packing device between any two, the high pressure
Outer filling unit includes high pressure packing outer tube, outer filling set, one-way piston, spring, interstage sleeve, sand control pipe, and the high pressure is filled
It fills out outer tube to open up filling mouth outside the high pressure and be cased with one-way piston on the outside of filling mouth herein, the setting of one-way piston front end outer side is outer
Filling set, one-way piston rear is provided with the interstage sleeve covered on high pressure packing outer tube, installs between the one-way piston and interstage sleeve
Spring, the interstage sleeve rear are provided with the sand control pipe covered on high pressure packing outer tube；The high pressure packing outer tube is equipped with
For positioning the boss of outer filling set, outer filling set is connected through a screw thread outside the outer filling mouth covered on high pressure packing outer tube,
Outer filling set lower end is designed as inclined-plane, and the upper outside of one-way piston is also configured as respective ramp；
Described pressure device includes sealing ring, cuts pin, plays pressure head, and described pressure head is fixed on connecting tube by cutting pin
Inside, the sealing ring setting is in connection pipe outer wall and seals up cutting pin outer fix, and the connecting tube bottom end is without through-hole
For blind plugging structure, break pin is fixed when by larger hydraulic from ground is cut, and is played a pressure head and is fallen on connecting tube bottom end；It is described
Connecting tube is connected to filling mouth in the high pressure for being equipped with Kong Bingyu liquid stream conversion equipment between pressure device is played；The liquid stream conversion equipment
Including interior crossover connection and external conversion pipe, the interior crossover connection is located on the inside of external conversion pipe upper end, on interior crossover connection uniformly distributed 2 it is convex
Item forms spout on interior crossover connection in addition to raised line, radial through-hole is equipped in raised line, outside between remaining part and external conversion pipe
Crossover connection is connect by welding manner with interior crossover connection, and external conversion pipe is also opened in the radial through-hole corresponding position of above-mentioned interior crossover connection
Apertured fills mouth in the corresponding formation high pressure in hole on the connecting tube, interior crossover connection and external conversion pipe；Stratum-the annular space
Filling switching mechanism includes circulating sleeve, slip pipe, leather cup, self-styled seat, and the circulating sleeve is equipped with 2 uniformly distributed circulation ports, described
Slip pipe, which is covered, seals 2 circulation ports in the outside of circulating sleeve, and the slip pipe lower part is threadedly coupled with self-styled seat, the leather cup setting
On the outside of the slip pipe above self-styled seat, self-styled seat supports leather cup keeps leather cup opening direction facing forward；Connect in the self-styled seat with slip pipe
There are annular grooves behind the screw thread connect, and annular groove is interior for installing self-locking ring, and baffle ring, the self-styled seat are cased with outside circulating sleeve bottom
Anti- rotation pin is provided between slip pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310656621.0A CN104695914B (en) | 2013-12-09 | 2013-12-09 | High-pressure packing sand-control tubing string is segmented in horizontal well tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310656621.0A CN104695914B (en) | 2013-12-09 | 2013-12-09 | High-pressure packing sand-control tubing string is segmented in horizontal well tube |
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| Publication Number | Publication Date |
|---|---|
| CN104695914A CN104695914A (en) | 2015-06-10 |
| CN104695914B true CN104695914B (en) | 2018-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310656621.0A Active CN104695914B (en) | 2013-12-09 | 2013-12-09 | High-pressure packing sand-control tubing string is segmented in horizontal well tube |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108625830B (en) * | 2017-03-22 | 2023-04-18 | 中国石油化工股份有限公司 | Ball throwing type layering sand prevention process pipe column and method thereof |
| CN109854213B (en) * | 2019-03-18 | 2023-05-30 | 中国石油化工股份有限公司 | Sand control tubular column of casing damage repair well |
| CN110118076B (en) * | 2019-06-24 | 2021-10-08 | 大港油田集团有限责任公司 | Centralizing type damping filling device |
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| CN1603574A (en) * | 2004-11-03 | 2005-04-06 | 中国石化胜利油田有限公司采油工艺研究院 | Layered pipe column for squeeze packing sand control process |
| CN200982162Y (en) * | 2006-11-24 | 2007-11-28 | 中国石化股份胜利油田分公司采油工艺研究院 | Stratified test sand control pipe |
| CN201486538U (en) * | 2009-08-14 | 2010-05-26 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Sand prevention pipe string used for open-hole well completion of side-drilled multilateral well and plug-in type acid cleaning filling inner pipe string thereof |
| CN103266868A (en) * | 2013-05-27 | 2013-08-28 | 中国石油天然气股份有限公司 | Horizontal well subsection gravel pack tool |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AR055812A1 (en) * | 2005-06-07 | 2007-09-12 | Ypf Sa | PROVISION AND METHOD OF ALTERNATIVE PUMPING WITH HOLLOW RODS WITHOUT PRODUCTION CHANNEL |
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2013
- 2013-12-09 CN CN201310656621.0A patent/CN104695914B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1603574A (en) * | 2004-11-03 | 2005-04-06 | 中国石化胜利油田有限公司采油工艺研究院 | Layered pipe column for squeeze packing sand control process |
| CN200982162Y (en) * | 2006-11-24 | 2007-11-28 | 中国石化股份胜利油田分公司采油工艺研究院 | Stratified test sand control pipe |
| CN201486538U (en) * | 2009-08-14 | 2010-05-26 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Sand prevention pipe string used for open-hole well completion of side-drilled multilateral well and plug-in type acid cleaning filling inner pipe string thereof |
| CN103266868A (en) * | 2013-05-27 | 2013-08-28 | 中国石油天然气股份有限公司 | Horizontal well subsection gravel pack tool |
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| CN104695914A (en) | 2015-06-10 |
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