CN108561109A - A kind of gang cut slots screen casing that can be rotated along axis - Google Patents
A kind of gang cut slots screen casing that can be rotated along axis Download PDFInfo
- Publication number
- CN108561109A CN108561109A CN201810024574.0A CN201810024574A CN108561109A CN 108561109 A CN108561109 A CN 108561109A CN 201810024574 A CN201810024574 A CN 201810024574A CN 108561109 A CN108561109 A CN 108561109A
- Authority
- CN
- China
- Prior art keywords
- screen casing
- sieve tube
- cutting seam
- seam sieve
- coal
- 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.)
- Pending
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Classifications
-
- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
- E21B43/006—Production of coal-bed methane
Abstract
A kind of gang cut slots screen casing that can be rotated along axis, is used for coal bed gas horizontal well coal petrography fracturing technology.The combination screen casing is made of box cupling (1), rotation spacer (2), external stability cutting seam sieve tube (3), internal rotatable cutting seam sieve tube (4) and screw thread (5).Inside and outside two cutting seam sieve tube is all made of oval slot, and stitches mode using spiral cloth.In coal bed gas horizontal well coal petrography fracturing technology, using the sieve tube completion, external stability cutting seam sieve tube plays the role of fixing and supporting, and internal screen casing can be rotated according to the angle of design, for controlling the contact position and area of slot and coal petrography.The gang cut slots screen casing can increase the contact area of slot and coal petrography under the premise of ensureing screen casing intensity, while optimize the fractue spacing of coal petrography, be conducive to the effect of coal petrography pressure break, improve Production of Coal-bed Gas Wells.
Description
Technical field
The present invention relates to the downhole tool classes more particularly to coal bed gas horizontal well coal petrography pressure break used in oil/gas well drilling field
Horizontal well completion in the process and coal petrography fracturing tool.
Background technology
Currently, coal bed gas belongs to Unconventional gas, it is commonly called as gas, main component is that (methane, it is coalification course to CH4
Middle generation, with free or adsorbed state preservation in coal seam and the natural-gas of surrounding rock.
At this stage, still coal bed gas well yield is very low for China's coal bed gas rich reserves, and main cause is the coal seam in China
Gas reservoir complex geologic conditions, while the cbm development technology and equipment in China falls behind relatively.During CBM well completion,
The fracturing transformation effect of coal petrography directly affects coal bed gas well yield.Common coal petrography fracturing technique has both at home and abroad at present：Waterpower
Pressure break, liquid CO 2 fracturing technique and High-Energy Gas Fracturing Technology etc..It is compared by the advantage and disadvantage to these fracturing techniques,
Gas fracturing technique damages the features such as small more and more by coal bed gas field application because its effect is good, to coal petrography.
North China Oilfield branch company proposes " coal bed gas horizontal well payzone negative pressure reaming renovation technique ", and brill is opened coal seam and arrived first
Then projected depth uses cutting seam sieve tube mode barefoot completion, complete coal petrography pressure break, pressure break by way of injecting gas boosting
Afterwards, crushed zone and crack expansion bands are will produce in reservoir.According to the principle of coal petrography pressure break, the area of slot is got in cutting seam sieve tube
Greatly, be more conducive to the effect of coal petrography pressure break, but the area of slot is bigger, the internal pressure strength of screen casing will be smaller, therefore,
Want that the effect for improving coal petrography pressure break will increase the area of slot as far as possible on the basis of ensureing screen casing intensity.
Invention content
The purpose of the present invention is to provide a kind of gang cut slots screen casings that can be rotated along axis, pass through the rotation of internal screen casing
The contact position and area for changing slot and coal petrography increase coal petrography and screen casing under the premise of screen casing intensity is constant to ensure that
Contact area, while the contact area by changing slot and coal petrography, can make the distribution in crack more uniform, be conducive to slot
Between communication exchange, to improve coal petrography pressure break efficiency.The purpose of the present invention is to provide a kind of horizontal gas well gas notes to adopt
Process simulation and Analysis of Vibration Characteristic experimental provision, it can be used to frictional resistance of the learning gas in different-diameter pipeline and
Stress situation, test associated gas, analyze and conclude related law, for gas piping design and application provide theoretical foundation with
Guidance.
For this purpose, the technical solution of patent of the present invention is as follows：
The gang cut slots screen casing using outer fixed screen casing as fixing and supporting, by rotating spacer fixed by interior cutting seam sieve tube
In the inside of external cutting seam sieve tube, and inside and outside cutting seam sieve tube is all made of the oval slot of spiral cloth seam, inside and outside cutting seam sieve tube
Slot is corresponding, and the slot quantity of external screen casing than internal screen casing slot quantity more than one times, be original slot rotation
30 ° obtain.Internal cutting seam sieve tube can rotate corresponding angle by rotating spacer.External cutting seam sieve tube both ends are box cuplings,
Serve connection and it is fixed.
The beneficial effects of the invention are as follows：
After coal bed gas horizontal well drilling well, passed through during plenum using this gang cut slots sieve tube completion
Rotation rotates spacer to control the rotation of internal cutting seam sieve tube, can thus increase the contact area of slot and coal petrography, in turn
The contact area for increasing gas and coal petrography, can also change the position that slot is contacted with coal petrography by rotating inner part cutting seam sieve tube,
And then changing the position that crack generates, the generation for being conducive to crack is more uniform, to increase interstitial communication, improves coal petrography
Pressure break efficiency.
Description of the drawings
Fig. 1 is the axial section of gang cut slots screen casing
In figure：1. box cupling, 2. rotation spacers, 3. outside cutting seam sieve tubes, 4. inside cutting seam sieve tubes, 5. screw threads
Fig. 2 is the radial cutaway view of gang cut slots screen casing
Specific implementation mode
As shown in Figure 1, a kind of gang cut slots screen casing that can be rotated along axis, including：Box cupling 1 and screw thread 5, pass through box cupling 1
It is attached and fixes with screw thread 5；Include external cutting seam sieve tube 3 and internal cutting seam sieve tube 4, inside between box cupling 1 and screw thread 5
The oval slot for having spiral cloth to stitch on cutting seam sieve tube 4, stitches a length of 30mm, slit width 12mm, the axis between two groups of spiral slots
It is 90mm to distance, every group of spiral slot includes 6 slots, i.e., the phase angle between circumferential two adjacent slots is 60 °, outside
Slot parameter on portion's cutting seam sieve tube 3 is identical as slot parameter on internal cutting seam sieve tube 4, but quantity is one times more, i.e., external to cut
Every group of spiral slot includes 12 slots on slit screen pipes 3, and the phase angle between circumferential two adjacent slots is 30 °；It cuts inside
Slit screen pipes 4 are connected to by rotating spacer 2 on tube body, and rotation spacer 2 can drive internal cutting seam sieve tube 4 to be rotated along axis.
In practical applications, after coal bed gas horizontal well is inflated supercharging, spacer is rotated by control to control inside
The rotation of cutting seam sieve tube 4 can increase the contact area of slot and coal petrography after the slot of inside and outside cutting seam sieve tube overlaps, and lead to
Change contact position is crossed, the quantity in coal petrography crack can be increased while improving the distribution in crack, is conducive to improve coal petrography pressure break
Efficiency improves the effect of coal petrography pressure break.
Claims (4)
1. a kind of gang cut slots screen casing that can be rotated along axis, by box cupling (1), rotation spacer (2), external stability cutting seam sieve tube
(3), internal rotatable cutting seam sieve tube (4) and screw thread (5) composition.It is characterized in that：
Cutting seam sieve tube is attached by box cupling and screw thread, external stability cutting seam sieve tube plays a part of to fix and support, internal
Cutting seam sieve tube is fixed on rotation spacer, rotates spacer by control to control the rotation of internal screen casing.
2. the gang cut slots screen casing according to claim 1 that can be rotated along axis, it is characterized in that：Inside and outside two cutting seam sieve tube is equal
Using oval slot, and by the way of spiral cloth seam.
3. the gang cut slots screen casing according to claim 2 that can be rotated along axis, it is characterized in that：External cutting seam sieve tube is cut
Seam quantity is 2 times of internal cutting seam sieve tube slot quantity, and one times had more rotates 30 ° by original slot and obtains.
4. the gang cut slots screen casing according to claim 1 that can be rotated along axis, it is characterized in that：Rotate spacer design angle
It is 30 °, spacer is rotated by control to control the rotation of internal screen casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810024574.0A CN108561109A (en) | 2018-01-11 | 2018-01-11 | A kind of gang cut slots screen casing that can be rotated along axis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810024574.0A CN108561109A (en) | 2018-01-11 | 2018-01-11 | A kind of gang cut slots screen casing that can be rotated along axis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108561109A true CN108561109A (en) | 2018-09-21 |
Family
ID=63530749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810024574.0A Pending CN108561109A (en) | 2018-01-11 | 2018-01-11 | A kind of gang cut slots screen casing that can be rotated along axis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108561109A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112246822A (en) * | 2020-08-27 | 2021-01-22 | 南京万德斯环保科技股份有限公司 | Oxygen therapy aeration system for accelerating stabilization of refuse landfill |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000234359A (en) * | 1999-02-12 | 2000-08-29 | Koken Boring Mach Co Ltd | Underground water collecting device |
| CN201443376U (en) * | 2009-07-09 | 2010-04-28 | 东营市兆鑫工贸有限责任公司 | Inner container type slotted screen pipe |
| CN102071914A (en) * | 2011-01-10 | 2011-05-25 | 中国石油大学(华东) | Novel sand control screen pipe with adjustable on-site sand stop precision |
| CN105723052B (en) * | 2014-10-20 | 2017-08-29 | 中国石油大学(华东) | The axially and radially movable combination sand-proof pipe of cutting seam sieve tube |
| CN206647087U (en) * | 2017-04-05 | 2017-11-17 | 长江大学 | A kind of new sand-filtering pipe for petroleum |
| CN206707681U (en) * | 2017-04-26 | 2017-12-05 | 陕西延长石油(集团)有限责任公司研究院 | A kind of sand control screen of adjustable filtering particle diameter |
-
2018
- 2018-01-11 CN CN201810024574.0A patent/CN108561109A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000234359A (en) * | 1999-02-12 | 2000-08-29 | Koken Boring Mach Co Ltd | Underground water collecting device |
| CN201443376U (en) * | 2009-07-09 | 2010-04-28 | 东营市兆鑫工贸有限责任公司 | Inner container type slotted screen pipe |
| CN102071914A (en) * | 2011-01-10 | 2011-05-25 | 中国石油大学(华东) | Novel sand control screen pipe with adjustable on-site sand stop precision |
| CN105723052B (en) * | 2014-10-20 | 2017-08-29 | 中国石油大学(华东) | The axially and radially movable combination sand-proof pipe of cutting seam sieve tube |
| CN206647087U (en) * | 2017-04-05 | 2017-11-17 | 长江大学 | A kind of new sand-filtering pipe for petroleum |
| CN206707681U (en) * | 2017-04-26 | 2017-12-05 | 陕西延长石油(集团)有限责任公司研究院 | A kind of sand control screen of adjustable filtering particle diameter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112246822A (en) * | 2020-08-27 | 2021-01-22 | 南京万德斯环保科技股份有限公司 | Oxygen therapy aeration system for accelerating stabilization of refuse landfill |
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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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180921 |
|
| WD01 | Invention patent application deemed withdrawn after publication |