Lost circulation additives and drilling fluid in serious thief zone

A technology of plugging while drilling and drilling fluid, applied in drilling equipment and other directions, can solve the problems of aggravated leakage, long construction period, long construction period of plugging, etc., to improve reinforcement capacity and pressure bearing capacity, and wide range of density adjustment. , Improve the effect of cementing quality

Active Publication Date: 2005-02-23
DONGYING TAIER GASOLINE TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] The existing lost circulation agents and fluids used in oil drilling have (1) bridge plugging agent, the formula is: 1-5 parts of bentonite, 1-5 parts of walnut shell, 1-5 parts of mica, made with water, its disadvantages Or the disadvantage is that the construction process is complicated, the construction period is long, only temporary plugging can not improve the pressure bearing capacity of the formation, and the plugging success rate is low; (2) fast setting cement, the formula is: 100 parts of oil well cement, 40-50 parts of water, 5-30 parts of coagulant, its shortcoming or deficiency is that the cement density is high, the thickening time, gelation time and pumpable time are difficult to control, and the problem of rapid loss or rapid curing of cement slurry is very e

Method used

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Embodiment Construction

[0025] According to the serious leakage formation plugging while drilling and drilling fluid according to the present invention, it consists of, parts by weight:

[0026] (A) base slurry: bentonite 4-6 soda ash 0.2-0.3 water 100

[0027] (B) Additives: ① Viscosity raising agent SD-LHV 0.5--3

[0028] ②Fluid loss reducer SK-II 0.5-2.5

[0029] ③Flow pattern regulator SD-R 0.5-2.5

[0030] ④ Density regulator SD-D 0.5-5

[0031] ⑤ Filling reinforcement MF-1 2-8

[0032] ⑥Linker MD-3 2-15

[0033] ⑦Bridging agent MD-2 8-20

[0034] Preparation method: conventional preparation method preparation. Prepare (A) first, then add (B) to (A) in sequence:

[0035] Case 1

[0036] (A) base slurry: bentonite 4 soda ash 0.2 water 100

[0037] (B) Additives:

[0038] ① 0.5 parts of viscosifying agent SD-LHV, combined by the ratio of CMC (sodium carboxymethyl cellulose): XC (biopolymer): HEC (hy...

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Abstract

This invention has disclosed one kind and missed strata and bored and stopped up leaking at the same time seriously, well drilling liquid, it makes up, weight share: (A) Base thick liquid: Alta-mud 4-6, soda ash 0.2-0.3, water is 100, additive 1) carry and glue pharmaceutical SD-LHV 0.5-3, 2) lower and strain and lose pharmaceutical SK-III 0.5-2.5, 3) the flowing type regulates pharmaceutical SD-R 0.5-2.5, 4) the density regulates pharmaceutical SD-D 0.5-5, 5) pack and strengthen pharmaceutical MF-1, 6) join pharmaceutical MD-III 2-15, 7) the brige stops up pharmaceutical MD-III 8-20. This invention has function more, have a good adaptability, can already be used as stopping up and leaking the liquid, can be used as the well drilling liquid, can either use and miss layer apply Gao to permeate layer low-voltagly or, crack cave with stalactites and stalagmites type stratum, and leak and stop up with the characteristics, such as layer, etc.. It is miss to is it stop up leak and well drilling of the craft to get into at the same time stratum seriously to apply mainly.

Description

1. Technical field [0001] The invention relates to a drilling plugging agent, in particular to a plugging while drilling and a drilling fluid for seriously lost formations. 2. Background technology [0002] The existing lost circulation agents and fluids used in oil drilling have (1) bridge plugging agent, the formula is: 1-5 parts of bentonite, 1-5 parts of walnut shell, 1-5 parts of mica, made with water, its disadvantages Or the disadvantage is that the construction process is complicated, the construction period is long, only temporary plugging can not improve the pressure bearing capacity of the formation, and the plugging success rate is low; (2) fast setting cement, the formula is: 100 parts of oil well cement, 40-50 parts of water, 5-30 parts of coagulant, its shortcoming or deficiency is that the cement density is high, the thickening time, gelation time and pumpable time are difficult to control, and the problem of rapid loss or rapid curing of cement slurry is ver...

Claims

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Application Information

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Inventor 隋跃华
Owner DONGYING TAIER GASOLINE TECH
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