JPH0464554B2 - - Google Patents
Info
- Publication number
- JPH0464554B2 JPH0464554B2 JP59242633A JP24263384A JPH0464554B2 JP H0464554 B2 JPH0464554 B2 JP H0464554B2 JP 59242633 A JP59242633 A JP 59242633A JP 24263384 A JP24263384 A JP 24263384A JP H0464554 B2 JPH0464554 B2 JP H0464554B2
- Authority
- JP
- Japan
- Prior art keywords
- additive
- mud
- weight
- drilling mud
- present
- 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.)
- Expired - Lifetime
Links
- 239000000654 additive Substances 0.000 claims description 27
- 230000000996 additive effect Effects 0.000 claims description 25
- 238000005553 drilling Methods 0.000 claims description 19
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 14
- 150000003839 salts Chemical class 0.000 claims description 12
- -1 alkali metal salts Chemical class 0.000 claims description 7
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 7
- 239000000440 bentonite Substances 0.000 claims description 6
- 229910000278 bentonite Inorganic materials 0.000 claims description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 6
- 238000006116 polymerization reaction Methods 0.000 claims description 6
- 229910000288 alkali metal carbonate Inorganic materials 0.000 claims description 5
- 150000008041 alkali metal carbonates Chemical class 0.000 claims description 5
- 229920002125 Sokalan® Polymers 0.000 claims description 4
- 239000004584 polyacrylic acid Substances 0.000 claims description 4
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- 150000003863 ammonium salts Chemical class 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 25
- 239000000203 mixture Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 8
- 238000009412 basement excavation Methods 0.000 description 8
- 239000004568 cement Substances 0.000 description 8
- 239000013535 sea water Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 description 4
- 235000017550 sodium carbonate Nutrition 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001879 gelation Methods 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 159000000001 potassium salts Chemical class 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229920003169 water-soluble polymer Polymers 0.000 description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 239000011013 aquamarine Substances 0.000 description 1
- 229960000892 attapulgite Drugs 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000002198 insoluble material Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 150000004682 monohydrates Chemical class 0.000 description 1
- 229910052625 palygorskite Inorganic materials 0.000 description 1
- 150000004686 pentahydrates Chemical class 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 229920001864 tannin Polymers 0.000 description 1
- 239000001648 tannin Substances 0.000 description 1
- 235000018553 tannin Nutrition 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Landscapes
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Description
＜産業上の利用分野＞
本発明は掘削泥水用添加剤に関する。
＜従来の技術、および問題点＞
従来、地盤掘削工法にはベントナイト泥水、ポ
リマー泥水などの泥水が使用されているが、海
水、セメントその他の電解質によつて泥水性能が
劣化することが知られている。
このため、重合度5000以下のポリアクリル酸の
一価塩と繊維素グリコール酸ソーダ（CMC）か
らなる添加剤（特開昭49−46763号公報）が提案
されている。
しかし、塩水、セメント等の混入による泥水性
能の劣化防止が充分でなく、また細菌による腐負
劣化の発生という問題があつた。
＜問題点を解決するための手段＞
本発明者らは、このような問題点を解決するた
め鋭意検討した結果、本発明に到達した。すなわ
ち、本発明は重合度が5000以下のポリアクリル酸
の一価塩(a)と炭酸カリウムを含有する炭酸アルカ
リ金属塩(b)からなる掘削泥水用添加剤である。
本発明における重合度が5000以下のポリアクリ
ル酸の一価塩(a)において、その重合度は好ましく
は50〜2500である。重合度が5000を越えると凝集
作用が強まるため土壌やセメントを凝集しやす
く、また重金属イオンが混入したとき不溶解物と
なり易いため、掘削泥水がゲル状となり、泥水性
能が悪化する。また、一価塩としては、アルカリ
金属塩（ナトリウム塩、カリウム塩など）、アン
モニウム塩およびアミン塩〔モノエタノールアミ
ン、ジエタノールアミン、トリエタノールアミ
ン、アルキル（C1〜C4）アミン塩など〕が挙げ
られる。好ましくはナトリウム塩およびカリウム
塩である。掘削泥水用添加剤中の(a)の純分量は通
常15〜85重量％、好ましくは20〜60重量％であ
る。15重量％未満ではセメント混入時にゲル化を
起こし、85重量％を越えると海水混入時にゲル化
を起こし、いずれも泥水性能が劣化する。
本発明における炭酸カリウムを含有する炭酸ア
ルカリ金属塩(b)において炭酸カリウムとしては無
水塩、一水塩、二水塩および五水塩が挙げられ
る。これらのうち好ましいのは無水塩である。炭
酸カリウムの他に他の炭酸アリカリ金属塩を含ん
でいてもよく、他の炭酸アルカリ金属塩としては
炭酸ナトリウムが挙げられる。炭酸ナトリウムと
しては無水塩（ソーダ灰）、一水塩および十水塩
が挙げられるが、好ましのはソーダ灰である。掘
削泥水用添加剤中の炭酸カリウムの純分量は通常
３〜85重量％、好ましくは20〜70重量％である。
３重量％未満では海水混入時にゲル化を起こし、
85重量％を越えるとセメント混入時にゲル化を起
こし、いずれも泥水性能が劣化する。掘削泥水に
対する掘削泥水用添加剤の純分量は0.01〜５重量
％、好ましくは0.05〜３重量％である。0.01重量
％未満では海水、セメントその他の電解質による
泥水性能の劣化を防止する効果が期待できず、５
重量％を越えると添加しただけの効果が期待でき
ず経済的に不利である。
本発明の添加剤を添加する対象となる掘削泥水
としては、ベントナイト、アタパルジヤイト、セ
リサイトなどの無機粘土質の泥水、水溶性高分子
を骨格とするポリマー泥水などが挙げられる。こ
れらのうち、好ましいのはベントナイト泥水であ
る。
掘削泥水に本発明の掘削泥水用添加剤を添加す
るにあたり、その添加方法としては以下の方法が
挙げられる。
(1) (a)および(b)をあらかじめ混合しておいて添加
する方法。
(2) (a)と(b)を別々に添加する方法；これには、た
とえば以下の２方法がある。
(a)に次いで(b)を加える方法。
(a)と(b)を同時に加える方法。
これらの添加方法のうち、好ましくは(2)のの
方法である。本発明の掘削泥水用添加剤は泥水を
撹拌しながら添加するのが好ましい。
この様にして得られた地盤掘削用泥水組成物
は、通常比重が1.02〜1.35、フアンネル粘度が21
〜45秒、10分ゲルストレングスが２パスカル以
下、脱水量が40ml以下などの物性を保持する。
泥水組成物を用いて地盤掘削を行う実施の態様
としては、まず本発明の掘削泥水用添加剤と無機
粘土類水溶性高分子などとを水に添加して泥水組
成物を調整する。次いでこの泥水組成物を掘削部
へ循環させながら掘削機を用いて地盤を掘削す
る。この場合、泥水組成物は常に掘削部内を満た
して、摩擦熱の吸収・放熱・潤滑等の作用や掘削
土砂の地上への搬出を行うことにより掘削を進め
るとともに、不透水性の泥壁を形成して掘削孔壁
の崩壊を防止している。この様にして所定の掘削
が完了した後に、適宜鉄筋枠組を入れ底部よりコ
ンクリートを投入して泥水を上部よりオーバーフ
ローさせながら掘削部内にコンクリートを満たし
て抗または壁を構築する。コンクリートと置換さ
れた泥水は再びタンク内に戻され再使用される。
本発明の添加剤は(a)と(b)とを含むものである
が、他に溶解促進剤（たとえばエチレングリコー
ル、ジエチレングリコール、ポリエチレングリコ
ールなど）、分散解こう剤（たとえばニトロフミ
ン酸ソーダ、タンニン類、リグニンスルフオン酸
塩、縮合リン酸塩など）を適宜併用することも可
能である。
＜発明の効果＞
本発明の掘削泥水用添加剤は、下記効果を有す
る。
(1) 本発明の添加剤を用いた組成物は、掘削中に
海水や塩水が流入してきても泥水物性（分散安
定性、脱水量など）が大きく変化しない。
(2) 本発明の添加剤を用いた組成物は、セメント
等が混入しても泥水物性（分散安定性、脱水量
など）がほとんど変化しない。このため繰り返
し使用が可能である。
(3) 本発明の添加剤を用いた組成物は、CMCな
どの生物分解されやすいものを含まないため、
腐負しにくい。
(4) 本発明の添加剤を用いた組成物は、ベントナ
イトなどの無機粘土類の分散安定性に優れる。
(5) 本発明の添加剤を用いた組成物は、脱水量が
少なく、泥壁形成性すなわち掘削孔の崩壊防止
性能が優れる。
＜実施例＞
以下、実施例により本発明を説明するが、本発
明はこれに限定されるものではない。実施例中の
部は重量基準である。また、泥水温度は20±３℃
である。なお、実施例および比較例における試験
方法は次の通りである。
(1) フアンネル粘土（FV）：
500c.c.のフアンネル粘度計で測定した。
単位は秒。
(2) 10分ゲルストレングス（10Gel）：
フアンVGメータで測定した。
単位はパスカル（Pa）。
(3) 脱水量：
APl規格による濾過機を用い、３Kg／cm2の圧
力下30分後の脱水量を測定した。
単位はml。
(4) 対セメント混入安定性：
泥水100部にポルトランドセメント１〜３部
を添加して充分に混合後１日経過した後に、上
記(1)〜(3)の泥水性能を測定した。
(5) 対海水混入安定性：
泥水100部に「アクアマリンＳ」〔八州薬品(株)
製人工海水、25倍濃縮品〕を１および３部添加
して充分に混合した後放置し、１日経過した後
に上記(1)〜(3)の泥水性能を測定した。
実施例１〜４および比較例１〜４
本発明の掘削泥水用添加剤（実施例１〜４）お
よび比較添加剤（比較例１〜４）の組成を第１表
に示す。
<Industrial Application Field> The present invention relates to an additive for drilling mud. <Conventional technology and problems> Conventionally, muddy water such as bentonite muddy water or polymer muddy water has been used in ground excavation methods, but it is known that the performance of muddy water deteriorates due to seawater, cement, and other electrolytes. There is. For this reason, an additive consisting of a monovalent salt of polyacrylic acid having a degree of polymerization of 5000 or less and cellulose sodium glycolate (CMC) has been proposed (Japanese Patent Application Laid-Open No. 49-46763). However, there was a problem in that it was not sufficient to prevent deterioration of muddy water performance due to contamination with salt water, cement, etc., and rot deterioration caused by bacteria occurred. <Means for Solving the Problems> The present inventors have made extensive studies to solve these problems, and as a result, have arrived at the present invention. That is, the present invention is an additive for drilling mud comprising a monovalent salt of polyacrylic acid (a) having a degree of polymerization of 5000 or less and an alkali metal carbonate salt containing potassium carbonate (b). In the polyacrylic acid monovalent salt (a) having a polymerization degree of 5000 or less in the present invention, the polymerization degree is preferably 50 to 2500. When the degree of polymerization exceeds 5000, the flocculating action becomes stronger, making it easier to flocculate soil and cement, and when heavy metal ions are mixed in, they tend to become insoluble materials, making the drilling mud gel-like and deteriorating the performance of the mud. Examples of monovalent salts include alkali metal salts (sodium salts, potassium salts, etc.), ammonium salts, and amine salts (monoethanolamine, diethanolamine, triethanolamine, alkyl (C 1 - C 4 ) amine salts, etc.). It will be done. Preferred are sodium and potassium salts. The pure amount of (a) in the additive for drilling mud is usually 15 to 85% by weight, preferably 20 to 60% by weight. If it is less than 15% by weight, gelation will occur when cement is mixed in, and if it exceeds 85% by weight, gelation will occur when seawater is mixed, and in both cases, muddy water performance will deteriorate. In the alkali metal carbonate salt (b) containing potassium carbonate in the present invention, potassium carbonate includes anhydrous salts, monohydrates, dihydrates and pentahydrates. Among these, preferred are anhydrous salts. Other alkali metal carbonate salts may be included in addition to potassium carbonate, and examples of other alkali metal carbonate include sodium carbonate. Examples of sodium carbonate include anhydrous salt (soda ash), monohydrate salt, and decahydrate salt, but soda ash is preferred. The pure amount of potassium carbonate in the additive for drilling mud is usually 3 to 85% by weight, preferably 20 to 70% by weight.
If it is less than 3% by weight, it will gel when mixed with seawater,
If it exceeds 85% by weight, gelation will occur when cement is mixed, and muddy water performance will deteriorate in either case. The pure amount of the additive for drilling mud in the drilling mud is 0.01 to 5% by weight, preferably 0.05 to 3% by weight. If it is less than 0.01% by weight, it cannot be expected to be effective in preventing deterioration of muddy water performance due to seawater, cement, and other electrolytes;
If the amount exceeds % by weight, no effect can be expected from just adding it, which is economically disadvantageous. Examples of the drilling mud to which the additive of the present invention is added include inorganic clay mud such as bentonite, attapulgite, and sericite, and polymer mud having a water-soluble polymer skeleton. Among these, bentonite mud is preferred. When adding the additive for drilling mud of the present invention to drilling mud, the following method can be mentioned as the addition method. (1) A method in which (a) and (b) are mixed in advance and added. (2) A method of adding (a) and (b) separately; this includes, for example, the following two methods. Method of adding (b) next to (a). Method of adding (a) and (b) at the same time. Among these addition methods, method (2) is preferred. The additive for drilling mud of the present invention is preferably added while stirring the mud. The mud composition for ground drilling obtained in this way usually has a specific gravity of 1.02 to 1.35 and a funnel viscosity of 21.
~45 seconds, 10 minutes Maintains physical properties such as gel strength of 2 Pascal or less and dehydration amount of 40 ml or less. In an embodiment of performing ground excavation using a mud water composition, first, the additive for drilling mud of the present invention, an inorganic clay water-soluble polymer, etc. are added to water to prepare a mud water composition. Next, the ground is excavated using an excavator while circulating this muddy water composition to the excavation part. In this case, the mud composition always fills the inside of the excavation area and acts to absorb frictional heat, dissipate heat, lubricate, etc., and transport excavated soil to the ground to advance the excavation and form an impermeable mud wall. This prevents the borehole wall from collapsing. After the prescribed excavation is completed in this manner, a reinforcing framework is appropriately installed, concrete is poured from the bottom, and while muddy water overflows from the top, the excavation is filled with concrete to construct a pit or wall. The muddy water that replaced the concrete is returned to the tank and reused. The additive of the present invention contains (a) and (b), but it also contains a dissolution promoter (e.g., ethylene glycol, diethylene glycol, polyethylene glycol, etc.), a dispersing peptizer (e.g., sodium nitrofumate, tannins, lignin, etc.). sulfonate, condensed phosphate, etc.) may be used in combination as appropriate. <Effects of the Invention> The additive for drilling mud of the present invention has the following effects. (1) In the composition using the additive of the present invention, the physical properties of mud (dispersion stability, amount of water removed, etc.) do not change significantly even when seawater or salt water flows in during excavation. (2) In the composition using the additive of the present invention, the physical properties of mud (dispersion stability, amount of water removed, etc.) hardly change even if cement or the like is mixed. Therefore, it can be used repeatedly. (3) Since the composition using the additive of the present invention does not contain substances that are easily biodegradable such as CMC,
Not easily rotten. (4) A composition using the additive of the present invention has excellent dispersion stability of inorganic clays such as bentonite. (5) A composition using the additive of the present invention has a small amount of dewatering, and has excellent mud wall formation property, that is, the ability to prevent collapse of a drilled hole. <Example> The present invention will be described below with reference to Examples, but the present invention is not limited thereto. Parts in the examples are by weight. In addition, the mud water temperature is 20±3℃
It is. The test methods in Examples and Comparative Examples are as follows. (1) Funnel clay (FV): Measured with a 500 c.c. Funnel viscometer. The unit is seconds. (2) 10 minute gel strength (10Gel): Measured with a Huang VG meter. The unit is pascal (Pa). (3) Amount of dehydration: Using a filter according to the APl standard, the amount of dehydration was measured after 30 minutes under a pressure of 3 Kg/cm 2 . The unit is ml. (4) Stability against cement mixing: 1 to 3 parts of Portland cement was added to 100 parts of muddy water, and 1 day after thorough mixing, the muddy performance of (1) to (3) above was measured. (5) Stability to seawater: Add "Aquamarine S" to 100 parts of muddy water (Yashu Yakuhin Co., Ltd.)
1 and 3 parts of manufactured artificial seawater, 25 times concentrated product] were added, thoroughly mixed and left to stand, and after one day had passed, the muddy water performance of (1) to (3) above was measured. Examples 1 to 4 and Comparative Examples 1 to 4 Table 1 shows the compositions of the drilling mud additives (Examples 1 to 4) and comparative additives (Comparative Examples 1 to 4) of the present invention.
【表】【table】
【表】
ジユーサーミキサーに清水100部およびベント
ナイト〔クニミネ工業(株)製クニゲルVI〕６部を
投入し、２分間撹拌した。次いで第１表に示され
る本発明の掘削泥水用添加剤および比較品を投入
し、更に２分間撹拌することによつて泥水組成物
を得た。その泥水性能を調べた結果を第２表に示
す。[Table] 100 parts of fresh water and 6 parts of bentonite (Kunigel VI, manufactured by Kunimine Kogyo Co., Ltd.) were placed in a Juicer mixer and stirred for 2 minutes. Next, the additive for drilling mud of the present invention and a comparative product shown in Table 1 were added, and the mixture was further stirred for 2 minutes to obtain a mud composition. Table 2 shows the results of investigating the muddy water performance.
【表】【table】
【表】
本発明の添加剤の泥水性能を良好であつた。
なお、比較例２の泥水は、１週間放置後腐負臭
が発生し、粘性が大幅に低下することが確認され
た。[Table] The muddy water performance of the additive of the present invention was good. In addition, it was confirmed that the muddy water of Comparative Example 2 developed a putrid odor after being left for one week, and its viscosity was significantly reduced.
Claims (1)
(a)と炭酸カリウムを含有する炭酸アルカリ金属塩
(b)からなる掘削泥水用添加剤。 ２ (a)と(b)の純分合計重量に対する(a)の純分量が
15〜85重量％である特許請求の範囲第１項記載の
添加剤。 ３ (a)と(b)の純分合計重量に対する炭酸カリウム
の純分量が３〜85重量％である特許請求の範囲第
１項または第２項記載の添加剤。 ４ 掘削泥水に対する(a)と(b)の純分合計重量が
0.01〜５重量％である特許請求の範囲第１項〜第
３項のいずれかに記載の添加剤。 ５ 掘削泥水がベントナイト泥水である特許請求
の範囲第１項〜第４項のいずれかに記載の添加
剤。 ６ 一価塩がアルカリ金属塩、アンモニウム塩お
よびアミン塩からなる群より選ばれた塩である特
許請求の範囲第１項〜第５項のいずれかに記載の
添加剤。[Claims] 1. Monovalent salt of polyacrylic acid with a degree of polymerization of 5000 or less
Alkali metal carbonate containing (a) and potassium carbonate
(b) An additive for drilling mud. 2 The pure amount of (a) relative to the total weight of pure components of (a) and (b) is
Additive according to claim 1, in an amount of 15 to 85% by weight. 3. The additive according to claim 1 or 2, wherein the pure amount of potassium carbonate is 3 to 85% by weight based on the total weight of pure components of (a) and (b). 4 The total weight of pure components (a) and (b) for drilling mud is
The additive according to any one of claims 1 to 3, which is 0.01 to 5% by weight. 5. The additive according to any one of claims 1 to 4, wherein the drilling mud is bentonite mud. 6. The additive according to any one of claims 1 to 5, wherein the monovalent salt is a salt selected from the group consisting of alkali metal salts, ammonium salts, and amine salts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24263384A JPS61120881A (en) | 1984-11-16 | 1984-11-16 | Additive for drilling mud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24263384A JPS61120881A (en) | 1984-11-16 | 1984-11-16 | Additive for drilling mud |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61120881A JPS61120881A (en) | 1986-06-07 |
| JPH0464554B2 true JPH0464554B2 (en) | 1992-10-15 |
Family
ID=17091953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24263384A Granted JPS61120881A (en) | 1984-11-16 | 1984-11-16 | Additive for drilling mud |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61120881A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4946763A (en) * | 1972-09-08 | 1974-05-04 | ||
| JPS58208376A (en) * | 1982-05-28 | 1983-12-05 | Shimizu Constr Co Ltd | Mud for use in mud drilling |
-
1984
- 1984-11-16 JP JP24263384A patent/JPS61120881A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4946763A (en) * | 1972-09-08 | 1974-05-04 | ||
| JPS58208376A (en) * | 1982-05-28 | 1983-12-05 | Shimizu Constr Co Ltd | Mud for use in mud drilling |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61120881A (en) | 1986-06-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |