CN107556987A - Coal bed gas suede capsule drilling fluid site operation compound method - Google Patents
Coal bed gas suede capsule drilling fluid site operation compound method Download PDFInfo
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Abstract
The present invention relates to a kind of coal bed gas suede capsule drilling fluid site operation compound method, the capsule suede agent of 5-8 parts by weight, the capsule matter agent of 2-5 parts by weight and the capsule courage agent of 1-2 parts by weight are sequentially added in the clear water of 400 parts by weight, and at least 30min is continuously stirred, obtain suede capsule drilling fluid；The density value of the suede capsule drilling fluid obtained using liquid densimeter measurement, suede capsule drilling fluid is measured using six-speed rotational viscometer, apparent viscosity, plastic viscosity, yield value and the ratio of dynamic shear force/yield value to plastic viscosity of suede capsule drilling fluid is obtained, obtains coal bed gas suede capsule drilling fluid.It is simple its object is to provide a kind of site operation, reservoir damage is low, coal seam wellbore stability effect is good, and leakproof control leakage ability is strong, can effectively solve the coal bed gas suede capsule drilling fluid site operation compound method for the problems such as Coal Seam Collapse is serious, drilling fluid leakage amount is big in CBM Drilling operation process.
Description
Technical field
The present invention relates to CBM Drilling field, relates in particular to a kind of coal bed gas suede capsule drilling fluid site operation and prepares
Method.
Background technology
Coal bed gas suede capsule drilling fluid is to be drilled for coal bed gas well scene during well operations, coal seam, sand layers and mud
Rock stratum leakage is caved in seriously and a kind of anti-collapse control leakage drilling fluid system of exploitation, can solve the problem that live straight well, directional well, horizontal well
And the problem of formation collapse and leakage regulation and control difficulty in the different type well type such as U-shaped well, multilateral well.
Coal bed gas suede capsule drilling fluid is a kind of gas-liquid two-phase fluid of Solid Free, by the suede that different-diameter is distributed in fluid
Capsule structure, the conventional drilling liquid lubrication borehole wall, cutting carring effect are realized, while ensure good anti-collapse control leakage effect.Therefore, suede
Vesica content, vesica volume distributed median determine whether property of drilling fluid is up to standard in capsule fluid.Therefore, live suede capsule fluid formulation whether
Success key is to ensure to be formed in drilling fluid have stable sufficient suede capsule structure.
Compound method is simple in Rong Nang fluid chamber, under the effect of clear water high speed shear, successively adds capsule according to design proportion
Suede agent, the agent of capsule matter and capsule courage agent, continuing to be sufficiently stirred 30min can the stable suede capsule drilling fluid of forming properties.But scene is matched somebody with somebody
During system, there are greatest differences in the indoor equipment such as equipment volume with slurry, mixing parametric, simply remove indoor technique with slurry to existing
Field can not effectively instruct suede capsule drilling fluid extemporaneous preparation, it is necessary to according to extemporaneous preparation equipment volume, process fluid stirring side with slurry
Formula and mixing speed, form a set of coal bed gas suede capsule drilling fluid field compounding method.
The content of the invention
It is an object of the invention to provide a kind of site operation is simple, reservoir damage is low, and coal seam wellbore stability effect is good, prevents
Leakage control leakage ability is strong, can effectively solve the problems such as Coal Seam Collapse is serious, drilling fluid leakage amount is big in CBM Drilling operation process
Coal bed gas suede capsule drilling fluid site operation compound method.
The coal bed gas suede capsule drilling fluid site operation compound method of the present invention, is made of following steps：
A, sequentially added in the clear water of 400 parts by weight the capsule suede agent of 5-8 parts by weight, the capsule matter agent of 2-5 parts by weight and
The capsule courage agent of 1-2 parts by weight, and at least 30min is continuously stirred, obtain suede capsule drilling fluid；
The capsule suede agent by the sodium carboxymethylcelluloses of 4.95-5.05 parts by weight, the sodium metaaluminate of 2-3 parts by weight, 2-
Double triethanolamine diisopropyl titanate esters of 3 parts by weight, the triethanolamine of 0.95-1.05 parts by weight are mixed；
The capsule matter agent is by the amylopectin of 3-5 parts by weight, the sodium hydroxide of 0.95-1.05 parts by weight, 4-7 weight
The sodium carboxymethylcellulose of part is mixed；
The capsule courage agent by the dodecyl amine oxide of 2-3 parts by weight, the octadecyl alcolol of 7-8 parts by weight or tetracosanol,
The epoxypropyltrimethylchloride chloride of 1-2 parts by weight is mixed；
B, using the density value of the obtained suede capsule drilling fluids of liquid densimeter measuring process A, six-speed rotational viscometer is utilized
The suede capsule drilling fluid that measuring process A is obtained, obtains apparent viscosity, plastic viscosity, yield value and the ratio of dynamic shear force/yield value to plastic viscosity of suede capsule drilling fluid, leads to
Cross and add a small amount of water or add a small amount of agent of capsule suede, the agent of capsule matter and capsule courage agent, the density value ρ of regulation and control suede capsule drilling fluid is
0.85—0.95g/cm3, the apparent viscosity AV of regulation and control suede capsule drilling fluid is 34-36mPas, regulates and controls the plasticity of suede capsule drilling fluid
Viscosity PV is 20-22mPas, and the yield value YP of regulation and control suede capsule drilling fluid is 16-18Pa, regulates and controls the dynamic modeling of suede capsule drilling fluid
It is 0.80-0.82Pa/mPas than YP/PV, obtains coal bed gas suede capsule drilling fluid.
Preferably, by adding a small amount of water or adding a small amount of agent of capsule suede, the agent of capsule matter and capsule courage agent in the step B,
The density value ρ for regulating and controlling suede capsule drilling fluid is 0.882-0.898g/cm3, the apparent viscosity AV of regulation and control suede capsule drilling fluid for 34.3-
35.6mPas, the plastic viscosity PV of regulation and control suede capsule drilling fluid is 20.2-21.6mPas, regulates and controls dynamic the cutting of suede capsule drilling fluid
Power YP is 16.3-17.6Pa, and the ratio of dynamic shear force/yield value to plastic viscosity YP/PV of regulation and control suede capsule drilling fluid is 0.806-0.815Pa/mPas, obtains coal
Layer gas suede capsule drilling fluid.
Preferably, by adding a small amount of water or adding a small amount of agent of capsule suede, the agent of capsule matter and capsule courage agent in the step B,
The density value ρ for regulating and controlling suede capsule drilling fluid is 0.89g/cm3, the apparent viscosity AV of regulation and control suede capsule drilling fluid is 35mPas, regulation and control
The plastic viscosity PV of suede capsule drilling fluid is 21mPas, and the yield value YP of regulation and control suede capsule drilling fluid is 17Pa, regulates and controls suede capsule drilling well
The ratio of dynamic shear force/yield value to plastic viscosity YP/PV of liquid is 0.81Pa/mPas, obtains coal bed gas suede capsule drilling fluid.
Preferably, in the step A it is the capsule suede that 5.5-7.6 parts by weight are sequentially added in the clear water of 400 parts by weight
The capsule courage agent of agent, the capsule matter agent of 2.4-4.7 parts by weight and 1.2-1.85 parts by weight.
Preferably, in the step A it is the capsule suede that 5.8-7.2 parts by weight are sequentially added in the clear water of 400 parts by weight
The capsule courage agent of agent, the capsule matter agent of 2.7-4.1 parts by weight and 1.4-1.65 parts by weight.
Preferably, continuously stirring in the step A is to be more than 10m in volume3Slurry commanding tank in be more than using rotating speed
50r/min stirrer paddle continuously stirs 35-50min, required fluid shearing speed during realizing that suede capsule drilling fluid is prepared.
Preferably, the equipment that continuously stirring in the step A uses is more than 10m including volume3Slurry commanding tank, slurry commanding tank
The bottom of side wall is provided with inlet and liquid outlet, and inlet is connected with liquid outlet by being in series with the liquid-transport pipe-line of fluid pump, stream
The discharge capacity of body pump is more than 15m3/ h, the middle part of liquid-transport pipe-line are provided with charging hopper.
The coal bed gas suede capsule drilling fluid site operation compound method of the present invention, using the exclusive technique and component of the present invention,
It uses following steps to be made：The capsule suede agent of 5-8 parts by weight, 2-5 parts by weight are sequentially added in the clear water of 400 parts by weight
The agent of capsule matter and the capsule courage agent of 1-2 parts by weight, and at least 30min is continuously stirred, obtain suede capsule drilling fluid；The capsule suede agent by
The sodium carboxymethylcellulose of 4.95-5.05 parts by weight, the sodium metaaluminate of 2-3 parts by weight, double triethanolamines of 2-3 parts by weight
Diisopropyl titanate esters, the triethanolamine of 0.95-1.05 parts by weight are mixed；The capsule matter agent by 3-5 parts by weight branch
Chain starch, the sodium hydroxide of 0.95-1.05 parts by weight, the sodium carboxymethylcellulose of 4-7 parts by weight are mixed；The capsule courage
Agent is by the dodecyl amine oxide of 2-3 parts by weight, the octadecyl alcolol of 7-8 parts by weight or tetracosanol, the epoxy of 1-2 parts by weight
Hydroxypropyltrimonium chloride is mixed；The density value of the suede capsule drilling fluid obtained using liquid densimeter measurement, utilize six speed
Apparent viscosity, plastic viscosity, yield value and the ratio of dynamic shear force/yield value to plastic viscosity for the suede capsule drilling fluid that rotational viscometer measurement obtains, it is a small amount of by adding
Water or add a small amount of agent of capsule suede, the agent of capsule matter and capsule courage agent, the density value ρ of regulation and control suede capsule drilling fluid is 0.85-0.95g/
cm3, regulation and control suede capsule drilling fluid apparent viscosity AV be 34-36mPas, regulate and control suede capsule drilling fluid plastic viscosity PV be 20-
22mPas, the yield value YP of regulation and control suede capsule drilling fluid is 16-18Pa, and the ratio of dynamic shear force/yield value to plastic viscosity YP/PV of regulation and control suede capsule drilling fluid is
0.80-0.82Pa/mPas, obtain coal bed gas suede capsule drilling fluid.Experiment shows, utilizes the coal bed gas suede capsule drilling well of the present invention
The coal bed gas suede capsule drilling fluid that liquid site operation compound method obtains, can effectively solve coal seam in CBM Drilling operation process and collapse
Collapse the problems such as serious, drilling fluid leakage amount is big, and it is good to coal seam wellbore stability effect, and leakproof control leakage ability is strong, its effect
Very prominent, notable, in addition, the coal bed gas suede capsule drilling fluid site operation compound method of the present invention, site operation is simple, reservoir
Injure low.Therefore, coal bed gas suede capsule drilling fluid site operation compound method of the invention has prominent substantive distinguishing features and shown
The progress of work.
To sum up, coal bed gas suede capsule drilling fluid site operation compound method of the invention, have coal seam wellbore stability effect it is good,
The features such as leakproof control leakage ability is strong.Effectively overcome in CBM Drilling operation process that Coal Seam Collapse is serious, drilling fluid leakage amount
The problems such as big.With the advantage such as site operation is simple, reservoir damage is low.
Embodiment
Not therefore the specific operation process of the present invention is further described below by specific embodiment, but the present invention
It is and any way limited.
Embodiment 1
The coal bed gas suede capsule drilling fluid site operation compound method of the present invention, is made of following steps：
A, sequentially added in the clear water of 400 parts by weight the capsule suede agent of 5-8 parts by weight, the capsule matter agent of 2-5 parts by weight and
The capsule courage agent of 1-2 parts by weight, and at least 30min is continuously stirred, obtain suede capsule drilling fluid；
The capsule suede agent by the sodium carboxymethylcelluloses of 4.95-5.05 parts by weight, the sodium metaaluminate of 2-3 parts by weight, 2-
Double triethanolamine diisopropyl titanate esters of 3 parts by weight, the triethanolamine of 0.95-1.05 parts by weight are mixed；
The capsule matter agent is by the amylopectin of 3-5 parts by weight, the sodium hydroxide of 0.95-1.05 parts by weight, 4-7 weight
The sodium carboxymethylcellulose of part is mixed；
The capsule courage agent by the dodecyl amine oxide of 2-3 parts by weight, the octadecyl alcolol of 7-8 parts by weight or tetracosanol,
The epoxypropyltrimethylchloride chloride of 1-2 parts by weight is mixed；
B, using the density value of the obtained suede capsule drilling fluids of liquid densimeter measuring process A, six-speed rotational viscometer is utilized
The suede capsule drilling fluid that measuring process A is obtained, obtains apparent viscosity, plastic viscosity, yield value and the ratio of dynamic shear force/yield value to plastic viscosity of suede capsule drilling fluid, leads to
Cross and add a small amount of water or add a small amount of agent of capsule suede, the agent of capsule matter and capsule courage agent, the density value ρ of regulation and control suede capsule drilling fluid is
0.85—0.95g/cm3, the apparent viscosity AV of regulation and control suede capsule drilling fluid is 34-36mPas, regulates and controls the plasticity of suede capsule drilling fluid
Viscosity PV is 20-22mPas, and the yield value YP of regulation and control suede capsule drilling fluid is 16-18Pa, regulates and controls the dynamic modeling of suede capsule drilling fluid
It is 0.80-0.82Pa/mPas than YP/PV, obtains coal bed gas suede capsule drilling fluid.
As a further improvement on the present invention, in above-mentioned steps B by add a small amount of water or add a small amount of capsule suede agent,
The agent of capsule matter and capsule courage agent, the density value ρ of regulation and control suede capsule drilling fluid is 0.882-0.898g/cm3, the table of regulation and control suede capsule drilling fluid
It is 34.3-35.6mPas to see viscosity AV, and the plastic viscosity PV of regulation and control suede capsule drilling fluid is 20.2-21.6mPas, regulation and control
The yield value YP of suede capsule drilling fluid is 16.3-17.6Pa, the ratio of dynamic shear force/yield value to plastic viscosity YP/PV of regulation and control suede capsule drilling fluid for 0.806-
0.815Pa/mPas, obtain coal bed gas suede capsule drilling fluid.
As a further improvement on the present invention, in above-mentioned steps B by add a small amount of water or add a small amount of capsule suede agent,
The agent of capsule matter and capsule courage agent, the density value ρ of regulation and control suede capsule drilling fluid is 0.89g/cm3, the apparent viscosity AV of regulation and control suede capsule drilling fluid
For 35mPas, the plastic viscosity PV of regulation and control suede capsule drilling fluid is 21mPas, and the yield value YP of regulation and control suede capsule drilling fluid is
17Pa, the ratio of dynamic shear force/yield value to plastic viscosity YP/PV of regulation and control suede capsule drilling fluid is 0.81Pa/mPas, obtains coal bed gas suede capsule drilling fluid.
As a further improvement on the present invention, be in above-mentioned steps A sequentially add 5.5 in the clear water of 400 parts by weight-
The capsule suede agent of 7.6 parts by weight, the capsule matter agent of 2.4-4.7 parts by weight and the capsule courage agent of 1.2-1.85 parts by weight.
As a further improvement on the present invention, be in above-mentioned steps A sequentially add 5.8 in the clear water of 400 parts by weight-
The capsule suede agent of 7.2 parts by weight, the capsule matter agent of 2.7-4.1 parts by weight and the capsule courage agent of 1.4-1.65 parts by weight.
As a further improvement on the present invention, continuously stirring in above-mentioned steps A is to be more than 10m in volume3Slurry commanding tank
It is middle to continuously stir 35-50min more than 50r/min stirrer paddle using rotating speed, it is required during realizing that suede capsule drilling fluid is prepared
Fluid shearing speed.
As a further improvement on the present invention, the equipment used that continuously stirs in above-mentioned steps A is more than including volume
10m3Slurry commanding tank, the bottom of pot sidewall with slurry is provided with inlet and liquid outlet, and inlet and liquid outlet are by being in series with fluid
The liquid-transport pipe-line of pump is connected, and the discharge capacity of fluid pump is more than 15m3/ h, the middle part of liquid-transport pipe-line are provided with charging hopper.When in use,
Circulation stirring can be carried out to the liquid in slurry commanding tank by starting fluid pump, required fluid during realizing that suede capsule drilling fluid is prepared
Shear rate, and can be added a small amount of capsule suede agent, the agent of capsule matter and the agent of capsule courage by the charging hopper being provided with the middle part of liquid-transport pipe-line
Into slurry commanding tank.
Missed to solve China Hancheng area Taiyuan Forma-tion 11# coal seams in serious problem of caving in, in June, 2017 to July, in
Han3-XJing carries out suede capsule and is drilled well site operation, and the coal seam for having used the present invention is tested under the external privacy conditions of technical scheme
Gas suede capsule drilling fluid site operation compound method.Han3-XJing designs three use Φ 215.9mm after driving Taiyuan Forma-tion 11# coal seams into
Drill bit horizontal drilling 951.00m rear sleeve completions.On June 30th, 2017, coal seam horizontal segment is pierced using suede capsule drilling fluid, to 7
The moon 7 is smoothly drilled into 1875m, takes 7 days altogether, accumulative to match somebody with somebody making herbs into wool capsule drilling fluid 150m3, average drilling speed 148.71m/d.Period, suede
Capsule drilling fluid adds up wastage and is less than 30m3, it is whole without cave in, the complex accident such as bit freezing, show good anti-collapse control leakage effect
Fruit.Experiment shows that extemporaneous preparation suede capsule property of drilling fluid reaches desired value.
Embodiment 2
The coal bed gas suede capsule drilling fluid site operation compound method of the present invention, is made of following steps：
Utilize volume 20m3Band stirring action slurry commanding tank, under 80r/min mixing speeds, successively add clear water 12m3, capsule suede
Agent 200kg, capsule matter agent 175kg, capsule courage agent 35kg, 30h is continuously stirred, then measure density using liquid densimeter, utilize six
Fast rotational viscometer measurement apparent viscosity, plastic viscosity, yield value and ratio of dynamic shear force/yield value to plastic viscosity, obtain coal bed gas suede capsule drilling fluid.
Claims (7)
1. coal bed gas suede capsule drilling fluid site operation compound method, it is characterized in that being made of following steps：
A, the agent of capsule suede, the capsule matter agent and 1-2 of 2-5 parts by weight of 5-8 parts by weight are sequentially added in the clear water of 400 parts by weight
The capsule courage agent of parts by weight, and at least 30min is continuously stirred, obtain suede capsule drilling fluid；
The capsule suede agent is by the sodium carboxymethylcellulose of 4.95-5.05 parts by weight, the sodium metaaluminate of 2-3 parts by weight, 2-3 weights
Measure double triethanolamine diisopropyl titanate esters of part, the triethanolamine of 0.95-1.05 parts by weight is mixed；
The capsule matter agent is by the amylopectin of 3-5 parts by weight, the sodium hydroxide of 0.95-1.05 parts by weight, 4-7 parts by weight
Sodium carboxymethylcellulose is mixed；
The capsule courage agent is by the dodecyl amine oxide of 2-3 parts by weight, the octadecyl alcolol of 7-8 parts by weight or tetracosanol, 1-2
The epoxypropyltrimethylchloride chloride of parts by weight is mixed；
B, using the density value of the obtained suede capsule drilling fluids of liquid densimeter measuring process A, measured using six-speed rotational viscometer
The suede capsule drilling fluid that step A is obtained, obtains apparent viscosity, plastic viscosity, yield value and the ratio of dynamic shear force/yield value to plastic viscosity of suede capsule drilling fluid, by adding
Enter a small amount of water or add a small amount of agent of capsule suede, the agent of capsule matter and capsule courage agent, the density value ρ of regulation and control suede capsule drilling fluid for 0.85-
0.95g/cm3, the apparent viscosity AV of regulation and control suede capsule drilling fluid is 34-36mPas, regulates and controls the plastic viscosity PV of suede capsule drilling fluid
For 20-22mPas, the yield value YP of regulation and control suede capsule drilling fluid is 16-18Pa, regulates and controls the ratio of dynamic shear force/yield value to plastic viscosity YP/PV of suede capsule drilling fluid
For 0.80-0.82Pa/mPas, coal bed gas suede capsule drilling fluid is obtained.
2. coal bed gas suede capsule drilling fluid site operation compound method according to claim 1, it is characterized in that：The step B
In by adding a small amount of water or adding a small amount of agent of capsule suede, the agent of capsule matter and capsule courage agent, the density value ρ of regulation and control suede capsule drilling fluid is
0.882—0.898g/cm3, the apparent viscosity AV of regulation and control suede capsule drilling fluid is 34.3-35.6mPas, regulates and controls suede capsule drilling fluid
Plastic viscosity PV be 20.2-21.6mPas, regulation and control suede capsule drilling fluid yield value YP be 16.3-17.6Pa, regulation and control suede
The ratio of dynamic shear force/yield value to plastic viscosity YP/PV of capsule drilling fluid is 0.806-0.815Pa/mPas, obtains coal bed gas suede capsule drilling fluid.
3. coal bed gas suede capsule drilling fluid site operation compound method according to claim 2, it is characterized in that：The step B
In by adding a small amount of water or adding a small amount of agent of capsule suede, the agent of capsule matter and capsule courage agent, the density value ρ of regulation and control suede capsule drilling fluid is
0.89g/cm3, the apparent viscosity AV of regulation and control suede capsule drilling fluid is 35mPas, and the plastic viscosity PV of regulation and control suede capsule drilling fluid is
21mPas, the yield value YP of regulation and control suede capsule drilling fluid is 17Pa, and the ratio of dynamic shear force/yield value to plastic viscosity YP/PV of regulation and control suede capsule drilling fluid is 0.81Pa/
MPas, obtain coal bed gas suede capsule drilling fluid.
4. coal bed gas suede capsule drilling fluid site operation compound method according to claim 3, it is characterized in that：The step A
In be the agent of capsule suede, the capsule matter agent of 2.4-4.7 parts by weight that 5.5-7.6 parts by weight are sequentially added in the clear water of 400 parts by weight
With the capsule courage agent of 1.2-1.85 parts by weight.
5. coal bed gas suede capsule drilling fluid site operation compound method according to claim 4, it is characterized in that：The step A
In be the agent of capsule suede, the capsule matter agent of 2.7-4.1 parts by weight that 5.8-7.2 parts by weight are sequentially added in the clear water of 400 parts by weight
With the capsule courage agent of 1.4-1.65 parts by weight.
6. the coal bed gas suede capsule drilling fluid site operation compound method according to claim 1 to 5, it is characterized in that：The step
Continuously stirring in rapid A is to be more than 10m in volume3Slurry commanding tank in continuously stirred more than 50r/min stirrer paddle using rotating speed
Mix 35-50min.
7. the coal bed gas suede capsule drilling fluid site operation compound method according to claim 1 to 5, it is characterized in that：The step
The equipment used that continuously stirs in rapid A is more than 10m including volume3Slurry commanding tank, the bottom of pot sidewall with slurry is provided with inlet
And liquid outlet, inlet and liquid outlet are connected by being in series with the liquid-transport pipe-line of fluid pump, the discharge capacity of fluid pump is more than 15m3/ h,
The middle part of liquid-transport pipe-line is provided with charging hopper.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108531154A (en) * | 2018-05-21 | 2018-09-14 | 李治 | Natural gas well workover suede bag pressure well liquid site operation preparation method |
| CN108533212A (en) * | 2018-05-21 | 2018-09-14 | 邓庭 | Isolation ground method is blocked in natural gas well well workover suede bag pressure well liquid |
| CN108643851A (en) * | 2018-05-21 | 2018-10-12 | 北京力会澜博能源技术有限公司封堵流体科技研发分公司 | A kind of natural gas well suede bag pressure well liquid anti-H 2 S kill-job technique |
| CN108690585A (en) * | 2018-05-21 | 2018-10-23 | 北京力会澜博能源技术有限公司 | Natural gas well suede bag pressure well liquid |
| CN108795401A (en) * | 2018-05-21 | 2018-11-13 | 北京力会澜博能源技术有限公司 | The capsule courage agent of natural gas well suede bag pressure well liquid |
| CN109294535A (en) * | 2018-11-16 | 2019-02-01 | 中联煤层气有限责任公司 | The preparation method and dosing apparatus of foam drilling fluid for the exploitation of three gas naked eyes |
| CN109294536A (en) * | 2018-11-16 | 2019-02-01 | 中联煤层气有限责任公司 | Foam drilling fluid for the exploitation of three gas naked eyes |
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| CN108533212A (en) * | 2018-05-21 | 2018-09-14 | 邓庭 | Isolation ground method is blocked in natural gas well well workover suede bag pressure well liquid |
| CN108643851A (en) * | 2018-05-21 | 2018-10-12 | 北京力会澜博能源技术有限公司封堵流体科技研发分公司 | A kind of natural gas well suede bag pressure well liquid anti-H 2 S kill-job technique |
| CN108690585A (en) * | 2018-05-21 | 2018-10-23 | 北京力会澜博能源技术有限公司 | Natural gas well suede bag pressure well liquid |
| CN108795401A (en) * | 2018-05-21 | 2018-11-13 | 北京力会澜博能源技术有限公司 | The capsule courage agent of natural gas well suede bag pressure well liquid |
| CN109294535A (en) * | 2018-11-16 | 2019-02-01 | 中联煤层气有限责任公司 | The preparation method and dosing apparatus of foam drilling fluid for the exploitation of three gas naked eyes |
| CN109294536A (en) * | 2018-11-16 | 2019-02-01 | 中联煤层气有限责任公司 | Foam drilling fluid for the exploitation of three gas naked eyes |
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