CN103865500B - 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 PDF

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Publication number
CN103865500B
CN103865500B CN201410112994.6A CN201410112994A CN103865500B CN 103865500 B CN103865500 B CN 103865500B CN 201410112994 A CN201410112994 A CN 201410112994A CN 103865500 B CN103865500 B CN 103865500B
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China
Prior art keywords
coiled tubing
liquid
tubing
speed
string
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CN201410112994.6A
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CN103865500A (en
Inventor
罗鹏
卢秀德
李剑秋
蔡远红
罗致臻
宋丹
裴楚洲
邹先雄
李睿
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China National Petroleum Corp
CNPC Chuanqing Drilling Engineering Co Ltd
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CNPC Chuanqing Drilling Engineering Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/40Spacer compositions, e.g. compositions used to separate well-drilling from cementing masses
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/22Handling 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

Liquid gum plug and the method using with pressure coiled tubing speed tubing string of liquid gum plug
Technical field
It is used as the coiled tubing technology of speed tubing string in the present invention relates to trip out Oil/gas Well in the case of with pressure, especially relates to And a kind of liquid gum plug and the method that uses with pressure coiled tubing speed tubing string of liquid gum plug, belong to industrial gas oil well Lower technical field of construction.
Background technology
Current domestic each oil field use coiled tubing to do gas well that speed flow string is all because in its region enters to be opened Adopting the later stage, bottom pressure reduces, and aquifer yield increases, and gas production reduces, and gas well fluid-carrying capability is deteriorated, and seriously governs these gas wells Later stage produce.The process using coiled tubing to do speed flow string can reduce fluid flow area, increases fluid Flow velocity, improves the drainage capacity of gas well, makes gas well resume production.Such as, gas disclosed in 03 phase in 2009 " oil drilling technology " Well CT speed tubing string completion technique theoretical research.
And along with volume fracturing and coiled tubing do the utilization of speed tubing string combined tech, efficiently solve porous reservoir Stimulation problems and the contradiction of big tubing string discharge opeing difficulty.The use that coiled tubing does speed tubing string simultaneously requires the most no longer to limit to In the old well that bottom pressure reduces, and require be applicable to inherently producing well with much higher formation pressures.
Need or the change of discharge opeing system according to producing of this type of well, it is possible to need to trip out in the case of with pressure The coiled tubing of speed tubing string is done in well.And the most also cannot meet in the case of with pressure, trip out well in do the continuous of speed tubing string Oil pipe.
Summary of the invention
It is an object of the invention to overcome existing coiled tubing to do the problems referred to above that speed tubing string exists, it is provided that a kind of liquid Plug and the method using with pressure coiled tubing speed tubing string of liquid gum plug.The present invention disclosure satisfy that and rises in the case of with pressure It is used as the requirement of the coiled tubing of speed tubing string in going out well, coiled tubing will not be caused damage simultaneously, can be widely applied to band The fields such as coiled tubing speed string technology are pressed.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of liquid gum plug, it is characterised in that the glue forming liquid gum plug includes the component of following mass percent:
Thickening agent 5% ~ 7%;
Antibacterial 0.11% ~ 0.22%;
Cosolvent 3% ~ 5%;
PH adjusting agent 1.5% ~ 2.0%;
Cross-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;The most stifled time≤24 hour.
Described thickening agent is modified plant gum, such as guar gum or hydroxypropyl guar gum etc..
Described antibacterial is dodecyl dimethyl benzyl ammonium chloride, myristyl benzyl dimethyl ammonium chloride, poly-season Ammonium salt or Gemini surface active agent.
Described cosolvent is formic acid, acetic acid, citric acid or hydrochloric acid.
Described pH adjusting agent is sodium hydroxide, sodium carbonate or sodium bicarbonate.
Described cross-linking agent is sodium borate, sodium metaaluminate or pyroantimonic acid.
A kind of method using with pressure coiled tubing speed tubing string of liquid gum plug, it is characterised in that comprise the steps:
Before a, the coiled tubing being used as speed tubing string in preparing to trip out Oil/gas Well with pressure, to its internal pump injecting glue liquid, Infusion amount is 700 900L, slow setting time≤30min, and the glue pumped into forms liquid gum plug, is kept apart by the oil gas of down-hole;
On b, the coiled tubing head that coiled tubing access panel is arranged on well head or coiled tubing hanger, then equipment is installed Parts;
C, by coiled tubing remaining on cylinder down to coiled tubing well head operation window upper port, by the company in coiled tubing Connect device to be connected with coiled tubing flow string in well;
D, examination carry coiled tubing, after confirming that junction is fricton-tight, above carry coiled tubing;
E, coiled tubing flow string rise to after more than big orifice gate, close big orifice gate, complete to be used as in well The coiled tubing of speed tubing string trips out the operation outside well.
In described step e, after when liquid gum plug, when 24 is little, interior dissolving becomes liquid, replace with compressed air or liquid nitrogen Be dissolved as the plug of liquid in going out coiled tubing, the liquid returned out through open flow flow process to cesspool.
Employing it is an advantage of the current invention that:
One, in the present invention, in Oil/gas Well with pressure, the coiled tubing infusion glue of speed tubing string it is used as, through (≤ Slow setting 30min), forms one section of liquid gum plug in coiled tubing, is isolated entirely from by the oil gas in well, uses this mode to make Without any pressure in the coiled tubing on liquid gum plug top, can safety it be connected with the coiled tubing loaded on equipment Connect, thus complete the operation tripping out outside well by the coiled tubing being used as speed tubing string in well.
Two, in the present invention, liquid gum plug resistance to compression reaches at least 15MPa;Temperature resistance reaches 70-90 degree;The most stifled time reaches≤24 Hour, and liquid gum plug in 24 hours can progressively dissolve become liquid, it is simple to discharge.
Three, after using the present invention, the engineering time is few, operating cost is low, and working performance is high;Safety, reliability height, it is possible to Meet the requirement of the coiled tubing being used as speed tubing string in tripping out well in the case of with pressure.
Four, in the present invention, form the glue of liquid gum plug and include the component of following mass percent: thickening agent 5% ~ 7%;Kill Microbial inoculum 0.11% ~ 0.22%;Cosolvent 3% ~ 5%;PH adjusting agent 1.5% ~ 2.0%;Cross-linking agent 1.0% ~ 2.0%;Surplus is water;Use this Component and proportion relation, can not only quickly form liquid gum plug, and disclosure satisfy that in the case of with pressure, trip out well in be used as The requirement of the coiled tubing of speed tubing string, will not cause damage to coiled tubing simultaneously, can be widely applied to pressure continuous oil The fields such as pipe speed string technology, and the proportioning of each component is interrelated, if not using aforementioned proportioning, then cannot form liquid glue Plug.
Detailed description of the invention
Embodiment 1
A kind of liquid gum plug, the glue forming liquid gum plug includes the component of following mass percent:
Thickening agent 5%;
Antibacterial 0.11%;
Cosolvent 3%;
PH adjusting agent 1.5%;
Cross-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;The most stifled time≤24 hour.
In the present embodiment, described thickening agent is modified plant gum, such as guar gum etc..
In the present embodiment, described antibacterial is dodecyl dimethyl benzyl ammonium chloride.
In the present embodiment, described cosolvent is formic acid.
In the present embodiment, described pH adjusting agent is sodium hydroxide.Make the pH value of glue in the range of 8-10.
Described cross-linking agent is sodium borate.
A kind of method using with pressure coiled tubing speed tubing string of liquid gum plug, comprises the steps:
Before a, the coiled tubing being used as speed tubing string in preparing to trip out Oil/gas Well with pressure, to its internal pump injecting glue liquid, Infusion amount is 700L, slow setting time≤30min, and the glue pumped into forms liquid gum plug, is kept apart by the oil gas of down-hole;
On b, the coiled tubing head that coiled tubing access panel is arranged on well head or coiled tubing hanger, then equipment is installed Parts;
C, by coiled tubing remaining on cylinder down to coiled tubing well head operation window upper port, by the company in coiled tubing Connect device to be connected with coiled tubing flow string in well;
D, examination carry coiled tubing, after confirming that junction is fricton-tight, above carry coiled tubing;
E, coiled tubing flow string rise to after more than big orifice gate, close big orifice gate, complete to be used as in well The coiled tubing of speed tubing string trips out the operation outside well.
In described step e, after when liquid gum plug, when 24 is little, interior dissolving becomes liquid, replace with compressed air or liquid nitrogen Be dissolved as the plug of liquid in going out coiled tubing, the liquid returned out through open flow flow process to cesspool.
Embodiment 2
A kind of liquid gum plug, the glue forming liquid gum plug includes the component of following mass percent:
Thickening agent 7%;
Antibacterial 0.22%;
Cosolvent 5%;
PH adjusting agent 2.0%;
Cross-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;The most stifled time≤24 hour.
In the present embodiment, described thickening agent is modified plant gum, such as hydroxypropyl guar gum etc..
In the present embodiment, described antibacterial is myristyl benzyl dimethyl ammonium chloride.
In the present embodiment, described cosolvent is acetic acid.
In the present embodiment, described pH adjusting agent is sodium carbonate.
In the present embodiment, described cross-linking agent is sodium metaaluminate.
A kind of method using with pressure coiled tubing speed tubing string of liquid gum plug, comprises the steps:
Before a, the coiled tubing being used as speed tubing string in preparing to trip out Oil/gas Well with pressure, to its internal pump injecting glue liquid, Infusion amount is 900L, slow setting time≤30min, and the glue pumped into forms liquid gum plug, is kept apart by the oil gas of down-hole;
On b, the coiled tubing head that coiled tubing access panel is arranged on well head or coiled tubing hanger, then equipment is installed Parts;
C, by coiled tubing remaining on cylinder down to coiled tubing well head operation window upper port, by the company in coiled tubing Connect device to be connected with coiled tubing flow string in well;
D, examination carry coiled tubing, after confirming that junction is fricton-tight, above carry coiled tubing;
E, coiled tubing flow string rise to after more than big orifice gate, close big orifice gate, complete to be used as in well The coiled tubing of speed tubing string trips out the operation outside well.
Embodiment 3
A kind of liquid gum plug, the glue forming liquid gum plug includes the component of following mass percent:
Thickening agent 6%;
Antibacterial 0.20%;
Cosolvent 4%;
PH adjusting agent 1.8%;
Cross-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;The most stifled time≤24 hour.
In the present embodiment, described thickening agent is modified plant gum, such as guar gum or hydroxypropyl guar gum etc..
In the present embodiment, described antibacterial is polyquaternary ammonium salt or Gemini surface active agent.
In the present embodiment, described cosolvent is citric acid or hydrochloric acid.
In the present embodiment, described pH adjusting agent is sodium bicarbonate.
In the present embodiment, described cross-linking agent is pyroantimonic acid.
A kind of method using with pressure coiled tubing speed tubing string of liquid gum plug, comprises the steps:
1, before being used as the coiled tubing of speed tubing string in preparing to trip out Oil/gas Well with pressure, join in advance to its internal infusion The glue made, infusion amount is 800L.Through the slow setting (≤30min) of certain time, 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, the part of appliance such as injection head, preventer is installed;
4, slowly by coiled tubing remaining on cylinder down to coiled tubing well head operation window upper port appropriate location, with even Continuous oil pipe female connector is connected with coiled tubing flow string in well;
5, examination carries coiled tubing, after confirming that junction is fricton-tight, slowly on carry coiled tubing, notice that suspending weight changes.
6, coiled tubing flow string rises to after more than big orifice gate, closes big orifice gate.With compression after 24 hours Air or liquid nitrogen are dissolved as the plug of liquid in replacing out coiled tubing, the liquid returned out through open flow flow process to cesspool.
Present invention is particularly suitable for 1.5 inches and the coiled tubing of 1.75 in2 kind specifications.

Claims (8)

1. the method using with pressure coiled tubing speed tubing string of liquid gum plug, it is characterised in that comprise the steps:
Before a, the coiled tubing being used as speed tubing string in preparing to trip out Oil/gas Well with pressure, to its internal pump injecting glue liquid, infusion Amount is 700 900L, slow setting time≤30min, and the glue pumped into forms liquid gum plug, is kept apart by the oil gas of down-hole;
On b, the coiled tubing head that coiled tubing access panel is arranged on well head or coiled tubing hanger, then equipment portion is installed Part;
C, by coiled tubing remaining on cylinder down to coiled tubing well head operation window upper port, by the adapter in coiled tubing It is connected with coiled tubing flow string in well;
D, examination carry coiled tubing, after confirming that junction is fricton-tight, above carry coiled tubing;
E, coiled tubing flow string rise to after more than big orifice gate, close big orifice gate, complete to be used as speed by well The coiled tubing of tubing string trips out the operation outside well;
Described glue includes the component of following mass percent:
Thickening agent 5% ~ 7%;
Antibacterial 0.11% ~ 0.22%;
Cosolvent 3% ~ 5%;
PH adjusting agent 1.5% ~ 2.0%;
Cross-linking agent 1.0% ~ 2.0%;
Surplus is water.
The method of with pressure coiled tubing speed tubing string of employing liquid gum plug the most according to claim 1, it is characterised in that: In described step e, after interior dissolving becomes liquid when 24 is little when liquid gum plug, replace out continuous oil with compressed air or liquid nitrogen Be dissolved as the plug of liquid in pipe, the liquid returned out through open flow flow process to cesspool.
The method of with pressure coiled tubing speed tubing string of employing liquid gum plug the most according to claim 1, it is characterised in that: Described liquid gum plug resistance to compression is at least 15MPa;Temperature resistance is 70-90 degree;The most stifled time≤24 hour.
The method of with pressure coiled tubing speed tubing string of employing liquid gum plug the most according to claim 1 and 2, its feature exists In: described thickening agent is modified plant gum.
The method of with pressure coiled tubing speed tubing string of employing liquid gum plug the most according to claim 1 and 2, its feature exists In: described antibacterial be dodecyl dimethyl benzyl ammonium chloride, myristyl benzyl dimethyl ammonium chloride, polyquaternary ammonium salt or Gemini surface active agent.
The method of with pressure coiled tubing speed tubing string of employing liquid gum plug the most according to claim 1 and 2, its feature exists In: described cosolvent is formic acid, acetic acid, citric acid or hydrochloric acid.
The method of with pressure coiled tubing speed tubing string of employing liquid gum plug the most according to claim 1 and 2, its feature exists In: described pH adjusting agent is sodium hydroxide, sodium carbonate or sodium bicarbonate.
The method of with pressure coiled tubing speed tubing string of employing liquid gum plug the most according to claim 1 and 2, its feature exists In: described cross-linking agent is sodium borate, sodium metaaluminate or pyroantimonic acid.
CN201410112994.6A 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 Active CN103865500B (en)

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* Cited by examiner, † Cited by third party
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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
EP3571371A4 (en) 2017-01-18 2020-10-21 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
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
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

Citations (1)

* Cited by examiner, † Cited by third party
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
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

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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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