CN103865500A - Liquid rubber plug and method for pulling out coiled tubing velocity pipe column by using liquid rubber plug under pressure - Google Patents
Liquid rubber plug and method for pulling out coiled tubing velocity pipe column by using liquid rubber plug under pressure Download PDFInfo
- Publication number
- CN103865500A CN103865500A CN201410112994.6A CN201410112994A CN103865500A CN 103865500 A CN103865500 A CN 103865500A CN 201410112994 A CN201410112994 A CN 201410112994A CN 103865500 A CN103865500 A CN 103865500A
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- China
- Prior art keywords
- coiled tubing
- liquid
- gum plug
- rubber plug
- well
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/40—Spacer compositions, e.g. compositions used to separate well-drilling from cementing masses
-
- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/22—Handling reeled pipe or rod units, e.g. flexible drilling pipes
Abstract
The invention discloses a liquid rubber plug and a method for pulling out a coiled tubing velocity pipe column by using the liquid rubber plug under pressure. A glue solution used for preparing the liquid rubber plug comprises the following components in percentage by mass: 5-7% of a thickening agent, 0.11-0.22% of a sterilizing agent, 3-5% of a cosolvent, 1.5-2.0% of a pH value regulator, 1.0-2.0% of a cross-linking agent, and the balance of water. The liquid rubber plug and the method for pulling out the coiled tubing velocity pipe column by using the liquid rubber plug under pressure, disclosed by the invention, can meet the requirements for pulling out a coiled tubing which is used as a velocity pipe column in a well under pressure, does not cause damage to the coiled tubing at the same time, and can be widely applied to the fields of techniques for pulling out the coiled tubing velocity pipe column under pressure and the like.
Description
Technical field
The present invention relates to trip out the coiled tubing technology that is used as speed tubing string in Oil/gas Well in situation with pressure, a kind of method that relates in particular to liquid gum plug and with pressure coiled tubing speed tubing string of employing liquid gum plug, belongs to industrial gas oil underground construction technical field.
Background technology
It is all that bottomhole wellbore pressure reduces because the gas well in its region enters the exploitation later stage that current domestic each Oilfield using coiled tubing does speed flow string, and water production rate increases, gas production rate minimizing, and gas well fluid-carrying capability variation, the later stage that is seriously restricting these gas wells produces.The processing method that adopts coiled tubing to do speed flow string can reduce fluid flow area, increases rate of flow of fluid, improves the discharge opeing ability of gas well, and gas well is resumed production.For example, 03 phase in 2009 " oil drilling technology " disclosed gas well CT speed tubing string completion technique theoretical investigation.
And along with volume fracturing and coiled tubing do the utilization of speed tubing string combined tech, efficiently solve the contradiction of porous reservoir volume increase problem and large tubing string discharge opeing difficulty.The service requirements of simultaneously coiled tubing being done to speed tubing string is not only no longer confined in old well that bottomhole wellbore pressure reduces, and requires to be applicable to itself just in the recovery well with much higher formation pressures.
According to the change of the need of production of this type of well or discharge opeing system, likely need in situation with pressure, to trip out the coiled tubing that does speed tubing string in well.In situation with pressure, trip out and also cannot meet at present the coiled tubing that does speed tubing string in well.
Summary of the invention
The object of the invention is to overcome existing coiled tubing and do the problems referred to above that speed tubing string exists, a kind of method of liquid gum plug and with pressure coiled tubing speed tubing string of employing liquid gum plug is provided.The present invention can meet and in situation with pressure, trips out the requirement that is used as the coiled tubing of speed tubing string in well, can not cause damage to coiled tubing simultaneously, can be widely used in the fields such as with pressure coiled tubing speed string technology.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of liquid gum plug, is characterized in that, the glue that forms liquid gum plug comprises the component of following mass percent:
Viscosifying agent 5% ~ 7%;
Sterilant 0.11% ~ 0.22%;
Solubility promoter 3% ~ 5%;
PH adjusting agent 1.5% ~ 2.0%;
Linking agent 1.0% ~ 2.0%;
Surplus is water.
Described liquid gum plug resistance to compression is at least 15MPa; Temperature resistance is 70-90 degree; Temporarily stifled time≤24 hour.
Described viscosifying agent is modified plant gum, as melon glue or hydroxypropyl guar gum etc.
Described sterilant is dodecyl benzyl dimethyl ammonium chloride, tetradecyl dimethyl benzyl ammonium chloride, polyquaternium or Gemini surface active agent.
Described solubility promoter is formic acid, acetic acid, citric acid or hydrochloric acid.
Described pH adjusting agent is sodium hydroxide, sodium carbonate or sodium bicarbonate.
Described linking agent is Sodium Tetraborate, sodium metaaluminate or pyroantimonic acid.
A method that adopts with pressure coiled tubing speed tubing string of liquid gum plug, is characterized in that, comprises the steps:
A, prepare trip out the coiled tubing that is used as speed tubing string in Oil/gas Well with pressure before, to its internal pump injecting glue liquid, infusion amount is 700-900L, slow setting time≤30min, the glue pumping into form liquid gum plug, the oil gas of down-hole is kept apart;
B, coiled tubing access panel is arranged on the coiled tubing head or coiled tubing hanger of well head, then erecting equipment parts;
C, by remaining coiled tubing on cylinder down to coiled tubing well head operation window upper port, the junctor in coiled tubing is connected with coiled tubing flow string in well;
Coiled tubing is carried in d, examination, after confirming that junction is fricton-tight, above carries coiled tubing;
E, coiled tubing flow string rise to after more than large latus rectum gate, close large latus rectum gate, complete the coiled tubing that is used as speed tubing string in well is tripped out to the operation outside well.
In described step e, when liquid gum plug dissolved and becomes after liquid in 24 hours, replace out the plug that is dissolved as liquid in coiled tubing with pressurized air or liquid nitrogen, the liquid returning out arrives sewage lagoon through open flow flow process.
Employing the invention has the advantages that:
One, in the present invention, to the coiled tubing infusion glue that is used as speed tubing string in Oil/gas Well with pressure, through the slow setting of (≤30min), in coiled tubing, form one section of liquid gum plug, oil gas in well is kept apart completely, adopt this mode to make in the coiled tubing on liquid gum plug top without any pressure, can safe it be connected with the coiled tubing loading on equipment, thereby complete, the coiled tubing that is used as speed tubing string in well is tripped out to the operation outside well.
Two,, in the present invention, liquid gum plug resistance to compression reaches at least 15MPa; Temperature resistance reaches 70-90 degree; Temporarily the stifled time reach≤24 hours, and liquid gum plug can progressively dissolve and become liquid in 24 hours, was convenient to discharge.
Three, adopt after the present invention, the engineering time is few, operating cost is low, and operating efficiency is high; Security, reliability are high, can meet and in situation with pressure, trip out the requirement that is used as the coiled tubing of speed tubing string in well.
Four,, in the present invention, the glue that forms liquid gum plug comprises the component of following mass percent: viscosifying agent 5% ~ 7%; Sterilant 0.11% ~ 0.22%; Solubility promoter 3% ~ 5%; PH adjusting agent 1.5% ~ 2.0%; Linking agent 1.0% ~ 2.0%; Surplus is water; Adopt this component and proportion relation, can not only form fast liquid gum plug, and can meet and in situation with pressure, trip out the requirement that is used as the coiled tubing of speed tubing string in well, can not cause damage to coiled tubing simultaneously, can be widely used in the fields such as with pressure coiled tubing speed string technology, and the proportioning of each component is interrelated, if do not adopt aforementioned proportioning, cannot form liquid gum plug.
Embodiment
Embodiment 1
A kind of liquid gum plug, the glue that forms liquid gum plug comprises the component of following mass percent:
Viscosifying agent 5%;
Sterilant 0.11%;
Solubility promoter 3%;
PH adjusting agent 1.5%;
Linking agent 1.0%;
Surplus is water.
In the present embodiment, described liquid gum plug resistance to compression is at least 15MPa; Temperature resistance is 70 degree; Temporarily stifled time≤24 hour.
In the present embodiment, described viscosifying agent is modified plant gum, as melon glue etc.
In the present embodiment, described sterilant is dodecyl benzyl dimethyl ammonium chloride.
In the present embodiment, described solubility promoter is formic acid.
In the present embodiment, described pH adjusting agent is sodium hydroxide.Make the pH value of glue within the scope of 8-10.
Described linking agent is Sodium Tetraborate.
A method that adopts with pressure coiled tubing speed tubing string of liquid gum plug, comprises the steps:
A, prepare trip out the coiled tubing that is used as speed tubing string in Oil/gas Well with pressure before, to its internal pump injecting glue liquid, infusion amount is 700L, slow setting time≤30min, the glue pumping into form liquid gum plug, the oil gas of down-hole is kept apart;
B, coiled tubing access panel is arranged on the coiled tubing head or coiled tubing hanger of well head, then erecting equipment parts;
C, by remaining coiled tubing on cylinder down to coiled tubing well head operation window upper port, the junctor in coiled tubing is connected with coiled tubing flow string in well;
Coiled tubing is carried in d, examination, after confirming that junction is fricton-tight, above carries coiled tubing;
E, coiled tubing flow string rise to after more than large latus rectum gate, close large latus rectum gate, complete the coiled tubing that is used as speed tubing string in well is tripped out to the operation outside well.
In described step e, when liquid gum plug dissolved and becomes after liquid in 24 hours, replace out the plug that is dissolved as liquid in coiled tubing with pressurized air or liquid nitrogen, the liquid returning out arrives sewage lagoon through open flow flow process.
Embodiment 2
A kind of liquid gum plug, the glue that forms liquid gum plug comprises the component of following mass percent:
Viscosifying agent 7%;
Sterilant 0.22%;
Solubility promoter 5%;
PH adjusting agent 2.0%;
Linking agent 2.0%;
Surplus is water.
In the present embodiment, described liquid gum plug resistance to compression is at least 15MPa; Temperature resistance is 90 degree; Temporarily stifled time≤24 hour.
In the present embodiment, described viscosifying agent is modified plant gum, as hydroxypropyl guar gum etc.
In the present embodiment, described sterilant is tetradecyl dimethyl benzyl ammonium chloride.
In the present embodiment, described solubility promoter is acetic acid.
In the present embodiment, described pH adjusting agent is sodium carbonate.
In the present embodiment, described linking agent is sodium metaaluminate.
A method that adopts with pressure coiled tubing speed tubing string of liquid gum plug, comprises the steps:
A, prepare trip out the coiled tubing that is used as speed tubing string in Oil/gas Well with pressure before, to its internal pump injecting glue liquid, infusion amount is 900L, slow setting time≤30min, the glue pumping into form liquid gum plug, the oil gas of down-hole is kept apart;
B, coiled tubing access panel is arranged on the coiled tubing head or coiled tubing hanger of well head, then erecting equipment parts;
C, by remaining coiled tubing on cylinder down to coiled tubing well head operation window upper port, the junctor in coiled tubing is connected with coiled tubing flow string in well;
Coiled tubing is carried in d, examination, after confirming that junction is fricton-tight, above carries coiled tubing;
E, coiled tubing flow string rise to after more than large latus rectum gate, close large latus rectum gate, complete the coiled tubing that is used as speed tubing string in well is tripped out to the operation outside well.
Embodiment 3
A kind of liquid gum plug, the glue that forms liquid gum plug comprises the component of following mass percent:
Viscosifying agent 6%;
Sterilant 0.20%;
Solubility promoter 4%;
PH adjusting agent 1.8%;
Linking agent 1.5%;
Surplus is water.
In the present embodiment, described liquid gum plug resistance to compression is at least 15MPa; Temperature resistance is 80 degree; Temporarily stifled time≤24 hour.
In the present embodiment, described viscosifying agent is modified plant gum, as melon glue or hydroxypropyl guar gum etc.
In the present embodiment, described sterilant is polyquaternium or Gemini surface active agent.
In the present embodiment, described solubility promoter is citric acid or hydrochloric acid.
In the present embodiment, described pH adjusting agent is sodium bicarbonate.
In the present embodiment, described linking agent is pyroantimonic acid.
A method that adopts with pressure coiled tubing speed tubing string of liquid gum plug, comprises the steps:
1, before preparing to trip out the coiled tubing that is used as speed tubing string in Oil/gas Well with pressure, the glue preparing in advance to its inner infusion, infusion amount is 800L.Through the slow setting (≤30min) of certain hour, glue to be pumped into forms plug, completely the oil gas of down-hole is kept apart.
2, coiled tubing access panel is arranged on the coiled tubing head (coiled tubing hanger) of well head;
3, install the equipment unit such as injector head, preventer;
4, slowly by remaining coiled tubing on cylinder down to coiled tubing well head operation window upper port appropriate location, be connected with coiled tubing flow string in well with coiled tubing female connector;
5, coiled tubing is carried in examination, after confirming that junction is fricton-tight, carries coiled tubing on slowly, notices that suspending weight changes.
6, coiled tubing flow string rises to after more than large latus rectum gate, closes large latus rectum gate.After 24 hours, replace out with pressurized air or liquid nitrogen the plug that is dissolved as liquid in coiled tubing, the liquid returning out arrives sewage lagoon through open flow flow process.
The present invention is particularly useful for the coiled tubing of 1.5 inches and 1.75 in2 kind specifications.
Claims (9)
1. a liquid gum plug, is characterized in that, the glue that forms liquid gum plug comprises the component of following mass percent:
Viscosifying agent 5% ~ 7%;
Sterilant 0.11% ~ 0.22%;
Solubility promoter 3% ~ 5%;
PH adjusting agent 1.5% ~ 2.0%;
Linking agent 1.0% ~ 2.0%;
Surplus is water.
2. liquid gum plug according to claim 1, is characterized in that: described liquid gum plug resistance to compression is at least 15MPa; Temperature resistance is 70-90 degree; Temporarily stifled time≤24 hour.
3. liquid gum plug according to claim 1 and 2, is characterized in that: described viscosifying agent is modified plant gum, as melon glue or hydroxypropyl guar gum etc.
4. liquid gum plug according to claim 1 and 2, is characterized in that: described sterilant is dodecyl benzyl dimethyl ammonium chloride, tetradecyl dimethyl benzyl ammonium chloride, polyquaternium or Gemini surface active agent.
5. liquid gum plug according to claim 1 and 2, is characterized in that: described solubility promoter is formic acid, acetic acid, citric acid or hydrochloric acid.
6. liquid gum plug according to claim 1 and 2, is characterized in that: described pH adjusting agent is sodium hydroxide, sodium carbonate or sodium bicarbonate.
7. liquid gum plug according to claim 1 and 2, is characterized in that: described linking agent is Sodium Tetraborate, sodium metaaluminate or pyroantimonic acid.
8. a method that adopts with pressure coiled tubing speed tubing string of liquid gum plug, is characterized in that, comprises the steps:
A, prepare trip out the coiled tubing that is used as speed tubing string in Oil/gas Well with pressure before, to its internal pump injecting glue liquid, infusion amount is 700-900L, slow setting time≤30min, the glue pumping into form liquid gum plug, the oil gas of down-hole is kept apart;
B, coiled tubing access panel is arranged on the coiled tubing head or coiled tubing hanger of well head, then erecting equipment parts;
C, by remaining coiled tubing on cylinder down to coiled tubing well head operation window upper port, the junctor in coiled tubing is connected with coiled tubing flow string in well;
Coiled tubing is carried in d, examination, after confirming that junction is fricton-tight, above carries coiled tubing;
E, coiled tubing flow string rise to after more than large latus rectum gate, close large latus rectum gate, complete the coiled tubing that is used as speed tubing string in well is tripped out to the operation outside well.
9. the method for with pressure coiled tubing speed tubing string of employing liquid gum plug according to claim 8, it is characterized in that: in described step e, when liquid gum plug dissolved and becomes after liquid in 24 hours, replace out the plug that is dissolved as liquid in coiled tubing with pressurized air or liquid nitrogen, the liquid returning out arrives sewage lagoon through open flow flow process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410112994.6A CN103865500B (en) | 2014-03-25 | 2014-03-25 | Liquid rubber plug and method for pulling out coiled tubing velocity pipe column by using liquid rubber plug under pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410112994.6A CN103865500B (en) | 2014-03-25 | 2014-03-25 | Liquid rubber plug and method for pulling out coiled tubing velocity pipe column by using liquid rubber plug under pressure |
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| CN103865500A true CN103865500A (en) | 2014-06-18 |
| CN103865500B CN103865500B (en) | 2017-01-11 |
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| CN201410112994.6A Active CN103865500B (en) | 2014-03-25 | 2014-03-25 | Liquid rubber plug and method for pulling out coiled tubing velocity pipe column by using liquid rubber plug under pressure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105419755A (en) * | 2015-11-17 | 2016-03-23 | 中石化石油工程技术服务有限公司 | Coiled tubing drilling-plug liquid system and preparing method thereof |
| CN108384522A (en) * | 2018-02-10 | 2018-08-10 | 长江大学 | A kind of deepwater drilling liquid displacement liquid |
| CN109294539A (en) * | 2018-09-25 | 2019-02-01 | 中国石油天然气股份有限公司 | A kind of fireflood well environmental protection envelope alters agent and the preparation method and application thereof |
| CN109294541A (en) * | 2018-09-25 | 2019-02-01 | 中国石油天然气股份有限公司 | A kind of fireflood well self-degradation diverting agent and the preparation method and application thereof |
| US10995563B2 (en) | 2017-01-18 | 2021-05-04 | Minex Crc Ltd | Rotary drill head for coiled tubing drilling apparatus |
| CN113088271A (en) * | 2021-04-09 | 2021-07-09 | 中国石油天然气股份有限公司 | Sulfur-resistant liquid rubber plug and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102093875A (en) * | 2010-12-08 | 2011-06-15 | 中国石油集团西部钻探工程有限公司 | Super guar gum foamed fracturing fluid injected with liquid nitrogen for low-permeability gas reservoir and preparation method thereof |
-
2014
- 2014-03-25 CN CN201410112994.6A patent/CN103865500B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102093875A (en) * | 2010-12-08 | 2011-06-15 | 中国石油集团西部钻探工程有限公司 | Super guar gum foamed fracturing fluid injected with liquid nitrogen for low-permeability gas reservoir and preparation method thereof |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105419755A (en) * | 2015-11-17 | 2016-03-23 | 中石化石油工程技术服务有限公司 | Coiled tubing drilling-plug liquid system and preparing method thereof |
| CN105419755B (en) * | 2015-11-17 | 2018-10-26 | 中石化石油工程技术服务有限公司 | A kind of continuous tubing drill plug liquid system and preparation method thereof |
| US10995563B2 (en) | 2017-01-18 | 2021-05-04 | Minex Crc Ltd | Rotary drill head for coiled tubing drilling apparatus |
| US11136837B2 (en) | 2017-01-18 | 2021-10-05 | Minex Crc Ltd | Mobile coiled tubing drilling apparatus |
| CN108384522A (en) * | 2018-02-10 | 2018-08-10 | 长江大学 | A kind of deepwater drilling liquid displacement liquid |
| CN109294539A (en) * | 2018-09-25 | 2019-02-01 | 中国石油天然气股份有限公司 | A kind of fireflood well environmental protection envelope alters agent and the preparation method and application thereof |
| CN109294541A (en) * | 2018-09-25 | 2019-02-01 | 中国石油天然气股份有限公司 | A kind of fireflood well self-degradation diverting agent and the preparation method and application thereof |
| CN109294541B (en) * | 2018-09-25 | 2021-03-09 | 中国石油天然气股份有限公司 | Fire flooding well self-degradation temporary plugging agent and preparation method and application thereof |
| CN109294539B (en) * | 2018-09-25 | 2021-03-09 | 中国石油天然气股份有限公司 | Fire flooding well environment-friendly channeling sealing agent and preparation method and application thereof |
| CN113088271A (en) * | 2021-04-09 | 2021-07-09 | 中国石油天然气股份有限公司 | Sulfur-resistant liquid rubber plug and preparation method thereof |
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| CN103865500B (en) | 2017-01-11 |
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Effective date of registration: 20200914 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Co-patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: The 1 section of No. 3 company Chuanqing Drilling Technology Information Office Chenghua District Green Road 610051 Chengdu City, Sichuan Province Patentee before: CNPC Chuanqing Drilling Engineering Co.,Ltd. |
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