JPS5826187A - Mud leakage preventing construction for forming underground hole by drilling - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a system for preventing muddy water from entering the ground when excavating and forming an underground hole while supplying muddy water into the underground hole for stabilizing the direction of excavation and removing excavation slime. The present invention relates to a method of supplying a chemical solution containing incyanate as a main component deep into an underground hole to seal the area where muddy water is lost with a solidified product of the chemical solution.

In the above construction method, if the chemical solution is simply supplied as in the past, an extremely large amount of chemical solution is required, especially when large cracks exist deeply, such as in deep bedrock. There are problems such as the need for a long time for mud prevention treatment, and in addition, it is difficult to control the solidification reaction of the chemical solution. Especially in deep excavation, if the reaction rate is high, the viscosity of the chemical solution increases in the injection pipe. Pumping becomes difficult or impossible, and conversely, if the reaction rate is low, an unnecessarily large amount of chemical solution will be required due to washing away at the point where it is lost.
It also involves intermittent work such as folding the work Km hours.

In view of the above-mentioned circumstances, the present invention provides an extremely simple and rational means to solve the problem, regardless of the size of the crack, and
Regardless of the depth of the underground hole, KL, in particular, makes it possible to easily and quickly and reliably prevent sludge while controlling the amount of chemical solution supplied, thereby allowing construction work to be carried out in an economically advantageous state and in a short construction period. The purpose of this project is to provide an effective method for preventing mud slippage when drilling and forming underground holes with large pm < and extremely deep depths, such as oil wells.

The present invention provides (1) in the above-mentioned method for preventing sludge loss for drilling underground holes, prior to the supply of the chemical liquid, a chemical containing a catalyst that promotes the solidification reaction of the chemical liquid is supported, and The filling material is supplied to the deep part of the underground hole.

In other words, before the chemical solution is supplied, the filling material performs concentrated KI at the entrance of the sludge area or at a location relatively close to the entrance.
A filter layer is formed by combining N, and the increase in flow resistance due to the filter layer effectively prevents a large amount of chemical solution from unnecessarily flowing out from the underground hole to a long distance. By supporting a chemical containing a catalyst that promotes the solidification reaction of the chemical liquid on the material, it is possible to cause the chemical to undergo an assimilation reaction at a uniform rate without solidifying until it comes into contact with the filler. It became Qiao. As a result, regardless of the size and depth of the spilled area, the chemical solution can be supplied to the desired location WVTI, IHM, and furthermore, it can be reliably solidified without being washed away at the desired location. While reducing the amount of chemical used,
In addition to being able to easily and reliably prevent sludge from slipping out in a short period of time, a single layer of filter is included in the chloride, making it possible to perform a strong and reliable seal.

The above chemical solution is mainly composed of isocyanate represented by the general formula R-(100)n, and upon reaction with water, it polymerizes while generating carbon dioxide gas to form a water-insoluble gel-like polymer. It is a substance that produces things. In the above general formula, R represents an aliphatic or aromatic group, or an organic group containing both, and is preferably an integer of 2 or more. Typical incyanates used in the present invention are as illustrated below. That is, 2,4-tolylene diisocyanate,
2.6-1 lylene diisocyanate), 2.4- and 2
．． Mixture of 6-tolylene diisocyanate, 4.4-diphenylmethane diisocyanate, 1.5-t phenylene diisocyanate, polymethylene polyphenylene diisocyanate, bitolylene diisocyanate, -monophenylene diisocyanate, 1.6- Aromatic or aliphatic polyinsyanates, such as xylylene diincyanate, 0- or -mono- or P-xylylene diisocyanate, methylene bis-p-phenylene diisocyanate, 2,6-cyincyanate methyl capate, or
A prepolymer containing isocyanate groups at the car end derived from these incyanates and a polyol containing active hydrogen such as polyester glycol or polyether glycol! − is.

In addition, for the above incyanate, a diluent such as penzole, quidylol, doluol, acetone, ethyl ethyl ketone, ethyl acetate, trichloroethylene, dibutyl phthalate, dioctyl heptathalate, dioctyl adipate, tricresyl phosphate, or , a surfactant such as a non-ionic silicone type, or other additives may be added in equal amounts.

For the above-mentioned various incyanates, catalysts for accelerating the solidification reaction include triethylamine, N-methylmorpholine, N-ethylmorpholine, dimethylbenzylamine, triethylenediamine, N,II-dimethyl-2-methylbiperazine, dimethyllaurylamine, and dimethylcoconut. A drug containing a tertiary amine such as tuamine or an organometallic compound such as dibutyltin laurate or stanasoftate is used in a state supported on the filler.

Examples of the filler include asbestos tailings, sawdust, pulp wire, glass fiber,
IIA fibrous proboscis-like substances such as cotton, feathers, straw, and cotton dregs - granular or gauze-like substances such as light, lump clay, bentonite, water rhinoceros, mineral rhinoceros, vermiculite, cork, coke, peat, etc.; Flaky substances such as turmeric, cellulose flakes, fish scales, cellophane, grains, striped barley shells and dregs, walnut shells, crushed materials, porous substances such as sponges, and other various substances and combinations thereof. is available.

Further, the filler may be subjected to treatments such as size adjustment, particle size adjustment, moisture content adjustment, washing, or other various pre/I & treatment processes.

Furthermore, in order to support a drug containing a solidification reaction promoting catalyst on these fillers, it is sufficient to liquefy the drug and allow it to be impregnated or adhered thereto.

Next, an embodiment of the construction method of the present invention will be described using illustrative drawings.

As shown in Fig. 1 (a), the drill bit (3a) is pressed while the muddy water (1) of bentonite, etc., is supplied to the underground hole (2) to maintain stability of the excavation wall surface and remove excavation slime. An underground hole (21) is excavated to form an oil well, natural gas well, etc.

As shown in Figures 1 & 4, when the bottom of the underground hole (2) encounters a mud spot, pull up the drill bit (3a) slightly and
The filler is supplied into the drill rod (3b) in a state in which a filler carrying a chemical including a solidification reaction promoting catalyst is mixed in the muddy water (4) to drill the ridge of the underground hole (2). supply to the department. As a result, the filler material supplied into the underground hole (2) flows together with the muddy water (1) to the muddy spot, causing the flow of water as shown in Figure 2 (P).

The filler material (5) is intertwined and caught at a location relatively close to the entrance of the sludge trap, forming a single layer of filter.

Next, as shown in Figure %III, a liquid (6) such as paraffin on the downstream side that floats in the muddy water (1) and does not react with the chemical solution is supplied as a space into the drill rod (3b), followed by 11&+71. to supply the muddy water (1) in the drill rod (3b) into the spacer liquid (6).
1. The chemical solution (7) is supplied to the deep part of the underground hole (2) from the drill bit (3M) while avoiding the solidification reaction of the chemical solution (7) within the drill rod (3b). As a result, due to the action of the filter layer of the filler (5), the flow out of the chemical solution (7) is suppressed, and the reaction solidified product of the chemical solution (7) grows in a state that includes the filler layer, so that jI2 As shown in figure (b), solidified material (8)
This will seal the missing person.

In addition, in order to supply the filler under pressure inside the underground hole, first supply the filler with a large size, and after squeezing out the mud,
It is also possible to supply a filler with a small size to achieve sufficient clogging.In addition, there are 8 methods for supplying chemical solutions and fillers.
1 can be changed freely.

Furthermore, the present invention can be applied to the formation of underground hole excavations for various purposes.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the method for preventing sludge loss for forming large underground excavations according to the present invention, and Figs. 1 (a) to 1) are explanatory diagrams of the method, and Figs. It is an explanatory view of a sealed state. (1)・・・Muddy water, (2)−・・・・Underground hole, (
5)...Filling material, (7)...Medical solution, prisoner...-Muddy water loss location. Agent Patent Attorney Shuji Kitamura Procedural Amendment Written April 1945 >7 B Method for Preventing Sludge Loss for Forming Underground Hole Excavation 3, Relationship with the Case of the Person Who Makes the Amendment Patent Applicant Address Dai 1i [#Osaka Honmachi V-chome-2, Higashi-ku, City Name (
H8) Takenaka Corporation Co., Ltd. 4 Agent @ 531 Address 5-8-1-7 Toyosaki, Oyodo-ku, Osaka-shi, Osaka Prefecture Contents of amendment ill Mei page 2/line 7 Lake-like substance J t r7 "Lake-like substance" corrected. Correct "supply to the deep part" in line J of page 1 of the Jt-#kensu men's specification book, which is supported by the filler material in the last line of page 7 of male mt1m, to "reach the deep part." (4) From line 1 to line // on page 1 of the specification, [RwJ paraffin......liquid (powder)] is defined as "liquid paraffin thickened with a specific gravity of 111E made of heavy material in advance, muddy water. (1), is east of Kakkuwa a (7), and does not react with these and other liquids.'' After "Medicinal liquid (7)" on page 1/line 4 of specification Il. Insert "Medicine (7)" on the last line of the first page of the specification.
The solidification reaction of is accelerated by the contact a1 held for the filler, and at the same time j is inserted. (Ma) K after “deviation point-ga” on page C of the specification collection
Insert "very effectively."

Claims (1)

[Claims] Hori 1III! While supplying muddy water (1) to the underground hole (2) for maintaining stability of the surface and removing excavated slime, perform KIII to excavate and form the underground hole (2), and pour the muddy water (1) underground. When mud water leakage occurs, a chemical solution (7) containing incyanate as a main component is supplied deep into the underground hole (2), and the area where muddy water is lost is sealed with the solidified chemical solution (7). In this construction method, prior to supplying the drug I1M! ) to the deep part of the underground hole (2).