CN106761561A - A kind of oil gas field coiled tubing wax removal stain eliminating technology and its instrument - Google Patents
A kind of oil gas field coiled tubing wax removal stain eliminating technology and its instrument Download PDFInfo
- Publication number
- CN106761561A CN106761561A CN201710017022.2A CN201710017022A CN106761561A CN 106761561 A CN106761561 A CN 106761561A CN 201710017022 A CN201710017022 A CN 201710017022A CN 106761561 A CN106761561 A CN 106761561A
- Authority
- CN
- China
- Prior art keywords
- pipe string
- coiled tubing
- instrument
- wax
- oil gas
- 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.)
- Granted
Links
- 238000005516 engineering process Methods 0.000 title claims abstract description 24
- 239000001993 wax Substances 0.000 claims abstract description 58
- 239000012188 paraffin wax Substances 0.000 claims abstract description 24
- 238000011010 flushing procedure Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 238000011017 operating method Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 5
- 230000008030 elimination Effects 0.000 abstract description 4
- 238000003379 elimination reaction Methods 0.000 abstract description 4
- 230000009977 dual effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
-
- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
Abstract
The present invention relates to a kind of oil gas field coiled tubing wax removal stain eliminating technology and its instrument, paraffin removal is carried out using coiled tubing, the wax removed is recyclable to return out ground, will not artificially cause pit shaft to block.Flushing tool upper end is designed with flushing hole and can clear up remaining wax at mechanical curettage.Connecting wax removal descaling tool with coiled tubing carries out wax removal scale removal, pipe string front end flushing tool can first carry out 360 ° of waterpower cleanings to pit shaft, with entering under pipe string, Wax remover carries out mechanical chipping to pit shaft again in pipe string, realize the dual manner of cleaning up that hydrodynamic cleaning is combined with mechanical curettage, elimination effect is substantially increased, and saves cost, improve operating efficiency.
Description
Technical field：
The present invention relates to a kind of oil gas field coiled tubing wax removal stain eliminating technology and its instrument.
Background technology：
After oil gas well development, into production procedure.Because output in oil composition containing containing many kinds of substance, its from
During underground is earthward flowed, pressure and temperature constantly changes.Due to this change, containing the wax in oil composition
Constantly separate out.The wax of precipitation is just sticked on the borehole wall, and with the growth of production time, wax can be increasingly thicker.Glued in the borehole wall
Attached wax can reduce oil-producing passage, block the oil-producing passage of bottom, cause oil gas well production to be greatly reduced.
Wax removal stain eliminating technology main both at home and abroad can be divided into four kinds at present, and one is Circulation and Hot Oil Spray cleaning, and two is mechanical removal,
Three is that chemical agent is removed, and four is that bacterium living beings suppress.First three mode elimination effect is limited, thicker especially for wax deposition
Situation.Although the 4th kind of mode elimination effect is preferably, spend high and very big by such environmental effects, be difficult to implement.
The content of the invention：
The present invention in order to make up the deficiencies in the prior art, there is provided a kind of oil gas field coiled tubing wax removal stain eliminating technology and its
Instrument, connecting wax removal descaling tool with coiled tubing carries out wax removal scale removal, and pipe string front end flushing tool can be carried out first to pit shaft
The cleaning of 360 ° of waterpower, with entering under pipe string, Wax remover carries out mechanical chipping to pit shaft again in pipe string, realize hydrodynamic cleaning with
The dual manner of cleaning up that mechanical curettage is combined, substantially increases elimination effect, and saves cost, improves operating efficiency,
Efficiently solve problems of the prior art.
The present invention is for the solution technical scheme that is used of above-mentioned technical problem：
A kind of oil gas field coiled tubing wax removal stain eliminating technology and its instrument, including following operating procedure：
A, the crossover sub for preparing standard, motor head assembly, vibrations instrument, weighted lever；
B, the end that coiled tubing is arranged on the crossover sub of ready standard；
C, the motor head assembly of ready standard, vibrations instrument, weighted lever conventional tool are connected on crossover sub；
D, tool pipe string is assembled, be connected to small coiled tubing end；
E, tool pipe is sealed in well, pump is opened, operation is carried out according to the discharge capacity for designing in advance；Now flushing tool pair before this
Debris are cleaned, and then Wax remover carries out mechanical curettage to leaving wax；
Need down in f, operation process to carry out pipe string after certain distance above to carry, whether observation tube string is hampered；Operation process
In need that continuous observation well head is counter to be arranged, once anti-drain body is returned out without debris such as waxs, upper lifting pipe string at once；
After g, drifting to design attitude, not termination of pumping keeps discharge capacity upper lifting pipe string, until pipe string is carried to well head.
Tool pipe string in the step d is split type tool pipe string, including pipe string body, in pipe string body upper part along managing
The circumferencial direction of string body is interval with several trapezoidal wiper blocks, along pipe string body on the pipe string body below wiper block
Length direction spacer ring sets several support blocks, a circular arc paraffin scraper is arranged outside each support block, away from righting
The support block lower section of block is arranged a rotation housing, and a bearing is separately installed with concave station inside shell of revolution body case two ends,
Pipe string body below rotation housing is provided with a mandrel, and several sprays are respectively equipped with rotation hull outside wall and mandrel front end
Mouth.
The circular arc paraffin scraper comprising angle be more than or equal to 360 °.
The lower end of the split type paraffin scraper is provided with a wedge angle, and the wedge angle angle is 15 ° -30 °, described split type
The upper end end of paraffin scraper is provided with a wedge angle, and the wedge angle angle is 15 ° -30 °.
Tool pipe string in the step d is spiral tool pipe string, including pipe string body, in pipe string body upper part along managing
The circumferencial direction of string body is interval with several trapezoidal wiper blocks, along pipe string body on the pipe string body below wiper block
Circumferencial direction spiral spacer is provided with several support blocks, and a screw wax scraper sequentially passes through the top of each support block and covers
In the outer surface of each support block, a rotation housing is arranged below the support block away from wiper block, in shell of revolution body case two
A bearing is separately installed with the internal concave station in end, a mandrel is provided with the pipe string body below rotation housing, in rotation housing
Lateral wall and mandrel front end are respectively equipped with several nozzles.
The total angle of the screw wax scraper is equal to or more than 360 °.
The lower end of the screw wax scraper is provided with a wedge angle, and the wedge angle angle is 15 ° -30 °, described spiral
The upper end end of paraffin scraper is provided with a wedge angle, and the wedge angle angle is 15 ° -30 °.
The nozzle being arranged on rotational shell is obliquely installed obliquely, the angle between the nozzle and pipe string body axis
It is 5 ° -15 °.
The quantity of the trapezoidal wiper block is 3-6, and the base of the trapezoidal wiper block is arranged on pipe string body, described
Two footing angles of trapezoidal wiper block are 30 ° -60 °.
The beneficial effect of oil gas field coiled tubing wax removal stain eliminating technology of the present invention and its instrument：Using coiled tubing
Paraffin removal is carried out, the wax removed is recyclable to return out ground, will not artificially cause pit shaft to block.Flushing tool upper end is designed with
Flushing hole can be cleared up remaining wax at mechanical curettage.Connecting wax removal descaling tool with coiled tubing carries out wax removal scale removal,
Pipe string front end flushing tool can first carry out the cleaning of 360 ° of waterpower to pit shaft, and with entering under pipe string, Wax remover is again to well in pipe string
Cylinder carries out mechanical chipping, realizes the dual manner of cleaning up that hydrodynamic cleaning is combined with mechanical curettage, substantially increases removing effect
Really, and cost is saved, improves operating efficiency.
Brief description of the drawings：
Fig. 1 is the structural representation of the split type tool pipe string of oil gas field coiled tubing wax removal stain eliminating technology.
Fig. 2 is the structural representation of the spiral tool pipe string of oil gas field coiled tubing wax removal stain eliminating technology.
In figure：1st, pipe string body, 2, wiper block, 3, support block, 4, circular arc paraffin scraper, 5, rotation housing, 6, mandrel, 7,
Nozzle, 8, bearing, 9, screw wax scraper.
Specific embodiment：
The characteristics of for explanation this programme can be understood, the present invention is made into one below by specific embodiment and with reference to accompanying drawing
Step explanation.
Embodiment 1：
As shown in Figure 1：A kind of oil gas field coiled tubing wax removal stain eliminating technology and its instrument, including following operating procedure：
A, the crossover sub for preparing standard, motor head assembly, vibrations instrument, weighted lever；
B, the end that coiled tubing is arranged on the crossover sub of ready standard；
C, the motor head assembly of ready standard, vibrations instrument, weighted lever conventional tool are connected on crossover sub；
D, tool pipe string is assembled, be connected to small coiled tubing end；
E, tool pipe is sealed in well, pump is opened, operation is carried out according to the discharge capacity for designing in advance；Now flushing tool pair before this
Debris are cleaned, and then Wax remover carries out mechanical curettage to leaving wax；
Need down in f, operation process to carry out pipe string after certain distance above to carry, whether observation tube string is hampered；Operation process
In need that continuous observation well head is counter to be arranged, once anti-drain body is returned out without debris such as waxs, upper lifting pipe string at once；
After g, drifting to design attitude, not termination of pumping keeps discharge capacity upper lifting pipe string, until pipe string is carried to well head.
Tool pipe string in the step d is split type tool pipe string, including pipe string body 1, on the top edge of pipe string body 1
The circumferencial direction of pipe string body 1 is interval with several trapezoidal wiper blocks 2, along pipe string on the pipe string body 1 below wiper block 2
The length direction spacer ring of body 1 sets several support blocks 3, and a circular arc paraffin scraper 4 is arranged in the outside of each support block 3,
A rotation housing 5 is arranged below the support block 3 away from wiper block 2, is pacified respectively on concave station inside rotation housing 5 shell two ends
Equipped with a bearing 8, a mandrel 6 is provided with the pipe string body 1 below rotation housing 5, in the rotation lateral wall of housing 5 and mandrel 6
Front end is respectively equipped with several nozzles 7.
The circular arc paraffin scraper 4 comprising angle be more than or equal to 360 °.Paraffin scraper angle is more than or equal to 360 ° of energy
Enough ensure no on circle in pit shaft residual.
The lower end of the split type paraffin scraper is provided with a wedge angle, and the wedge angle angle is 15 ° -30 °, described split type
The upper end end of paraffin scraper is provided with a wedge angle, and the wedge angle angle is 15 ° -30 °.Design wedge angle, and wedge angle angle be 15 °-
30 °, could so reduce enter resistance under pipe string, the wax and debris condensed in scraping pit shaft of being more convenient for.
The nozzle 7 being arranged on rotational shell is obliquely installed obliquely, between the nozzle 7 and the axis of pipe string body 1
Angle is 5 ° -15 °.But nozzle 7 is flushable upwards have been struck off also has remained in wax and debris inside paraffin scraper, keeps this
Place's cleaning, is easy to enter resistance under reduction pipe string.
The quantity of the trapezoidal wiper block 2 is 3-6, and the base of the trapezoidal wiper block 2 is arranged on pipe string body 1,
Two footing angles of the trapezoidal wiper block 2 are 30 ° -60 °.Paraffin scraper is prevented to be stuck in undergauge when pipe string is by wellhead manifold
Place, under enter during prevent paraffin scraper serious by borehole wall crimp.
In operation process, in coiled tubing end coupling adapter, connection screw thread is converted to.In crossover sub and instrument
The conventional tools such as matching used motor head assembly, vibrations instrument can be connected between pipe string.Last fastening means pipe string.According to normal
Enter connected pipes under code sequence.The Wax remover part of the top of pipe string body 1 enter under during to wax for being piled up on pit shaft etc.
Debris carry out mechanical curettage, and under a fixed displacement, its rotational shell can revolve at a high speed for the flushing tool part of the lower section of pipe string body 1
Turn, drive nozzle 7 to rotate, 360 ° of cleanings are carried out to pit shaft madial wall, it is ensured that debris are not left in cleaning.
Embodiment 2：
As shown in Figure 2:A kind of oil gas field coiled tubing wax removal stain eliminating technology and its instrument, the tool pipe in the step d
It is spiral tool pipe string to go here and there, including pipe string body 1, is interval with along the circumferencial direction of pipe string body 1 on the top of pipe string body 1
Several trapezoidal wiper blocks 2, are provided with the pipe string body 1 below wiper block 2 along the circumferencial direction spiral spacer of pipe string body 1
Several support blocks 3 a, screw wax scraper 9 sequentially passes through the top of each support block 3 and is covered in the outer of each support block 3
Surface, is arranged a rotation housing 5 below the support block 3 away from wiper block 2, on concave station inside rotation housing 5 shell two ends
Be separately installed with a bearing 8, rotation housing 5 below pipe string body 1 on be provided with a mandrel 6, rotation the lateral wall of housing 5 and
The front end of mandrel 6 is respectively equipped with several nozzles 7.
The total angle of the screw wax scraper 9 is equal to or more than 360 °.Paraffin scraper angle is more than or equal to 360 ° of ability
Enough ensure no on circle in pit shaft residual.
The lower end of the screw wax scraper 9 is provided with a wedge angle, and the wedge angle angle is 15 ° -30 °, the spiral
The upper end end of formula paraffin scraper 9 is provided with a wedge angle, and the wedge angle angle is 15 ° -30 °.Design wedge angle, and wedge angle angle be 15 °-
30 °, could so reduce enter resistance under pipe string, the wax and debris condensed in scraping pit shaft of being more convenient for.
Other are same with embodiment 1.
Above-mentioned specific embodiment cannot function as limiting the scope of the invention, for the technology people of the art
For member, any alternate modification or conversion made to embodiment of the present invention are all fallen within protection scope of the present invention.
The present invention does not describe part in detail, is the known technology of those skilled in the art of the present technique.
Claims (9)
1. a kind of oil gas field coiled tubing wax removal stain eliminating technology and its instrument, it is characterised in that：Including following operating procedure：
A, the crossover sub for preparing standard, motor head assembly, vibrations instrument, weighted lever；
B, the end that coiled tubing is arranged on the crossover sub of ready standard；
C, the motor head assembly of ready standard, vibrations instrument, weighted lever conventional tool are connected on crossover sub；
D, tool pipe string is assembled, be connected to coiled tubing end；
E, tool pipe is sealed in well, pump is opened, operation is carried out according to the discharge capacity for designing in advance；Now before this flushing tool to debris
Cleaned, then Wax remover carries out mechanical curettage to leaving wax；
Need down in f, operation process to carry out pipe string after certain distance above to carry, whether observation tube string is hampered；Needed in operation process
Continuous observation well head is counter to be arranged, once anti-drain body is returned out without debris such as waxs, upper lifting pipe string at once；
After g, drifting to design attitude, not termination of pumping keeps discharge capacity upper lifting pipe string, until pipe string is carried to well head.
2. oil gas field coiled tubing wax removal stain eliminating technology according to claim 1 and its instrument, it is characterised in that：The step
Tool pipe string in rapid d is split type tool pipe string, including pipe string body, pipe string body upper part along pipe string body circumference side
To several trapezoidal wiper blocks are interval with, along the length direction spacer ring of pipe string body on the pipe string body below wiper block
If several support blocks, a circular arc paraffin scraper is arranged outside each support block, below the support block away from wiper block
A rotation housing is arranged, a bearing is separately installed with concave station inside shell of revolution body case two ends, below rotation housing
Pipe string body is provided with a mandrel, and several nozzles are respectively equipped with rotation hull outside wall and mandrel front end.
3. oil gas field coiled tubing wax removal stain eliminating technology according to claim 2 and its instrument, it is characterised in that：The circle
Arc paraffin scraper comprising angle be more than or equal to 360 °.
4. oil gas field coiled tubing wax removal stain eliminating technology according to claim 2 and its instrument, it is characterised in that：Described point
The lower end of body formula paraffin scraper is provided with a wedge angle, and the wedge angle angle is 15 ° -30 °, the upper end end of the split type paraffin scraper
Portion is provided with a wedge angle, and the wedge angle angle is 15 ° -30 °.
5. oil gas field coiled tubing wax removal stain eliminating technology according to claim 1 and its instrument, it is characterised in that：The step
Tool pipe string in rapid d is spiral tool pipe string, including pipe string body, pipe string body upper part along pipe string body circumference side
To being interval with several trapezoidal wiper blocks, between the circumferencial direction spiral on the pipe string body below wiper block along pipe string body
Every several support blocks are provided with, a screw wax scraper sequentially passes through the top of each support block and is covered in each support block
Outer surface, is arranged a rotation housing below the support block away from wiper block, divides on concave station inside shell of revolution body case two ends
One bearing is not installed, a mandrel is provided with the pipe string body below rotation housing, before rotation hull outside wall and mandrel
End is respectively equipped with several nozzles.
6. oil gas field coiled tubing wax removal stain eliminating technology according to claim 5 and its instrument, it is characterised in that：The spiral shell
The total angle of rotating paraffin scraper is equal to or more than 360 °.
7. oil gas field coiled tubing wax removal stain eliminating technology according to claim 5 and its instrument, it is characterised in that：The spiral shell
The lower end of rotating paraffin scraper is provided with a wedge angle, and the wedge angle angle is 15 ° -30 °, the upper end end of the screw wax scraper
Portion is provided with a wedge angle, and the wedge angle angle is 15 ° -30 °.
8. the oil gas field coiled tubing wax removal stain eliminating technology and its instrument according to claim 2 or 5, it is characterised in that：If
The nozzle put on rotational shell is obliquely installed obliquely, and the angle between the nozzle and pipe string body axis is 5 ° -15 °.
9. the oil gas field coiled tubing wax removal stain eliminating technology and its instrument according to claim 2 or 5, it is characterised in that：Institute
It is 3-6 to state the quantity of trapezoidal wiper block, and the base of the trapezoidal wiper block is arranged on pipe string body, the trapezoidal wiper block
Two footing angles be 30 ° -60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710017022.2A CN106761561B (en) | 2017-01-11 | 2017-01-11 | Wax removal and scale removal process for coiled tubing of oil and gas field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710017022.2A CN106761561B (en) | 2017-01-11 | 2017-01-11 | Wax removal and scale removal process for coiled tubing of oil and gas field |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106761561A true CN106761561A (en) | 2017-05-31 |
| CN106761561B CN106761561B (en) | 2024-03-01 |
Family
ID=58948895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710017022.2A Active CN106761561B (en) | 2017-01-11 | 2017-01-11 | Wax removal and scale removal process for coiled tubing of oil and gas field |
Country Status (1)
| Country | Link |
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| CN (1) | CN106761561B (en) |
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