47results about How to "Wall protection effect is good" patented technology

The invention discloses a high-temperature-resistant recyclable micro-foam drilling fluid or well-completion fluid, which is composed of: (A) base slurry: 1-2 bentonite, 3-5 salt-resistant clay, 0.2-0.3 soda ash, and 100 parts by weight ;(B) Additives: ①High temperature inhibitor 3-5, ②High temperature viscosifier 2-5, ③High temperature fluid loss reducer 3-6, ④High temperature salt resistance, viscosity raising fluid loss reducer 1-3, ⑤Flow type Regulator 1-3, ⑥ high temperature foaming agent 2-5, ⑦ high temperature foam stabilizer 1-2.5. The invention has high temperature resistance, good carrying and suspension ability in low pressure deep wells, can be used for deep well exploration and development, has strong adaptability, can be used as drilling fluid and well completion fluid, and can be used in high temperature deep wells and low pressure Carbonate formations can also be used in high-temperature, low-pressure, low-permeability mudstone formations, mudstone shale reservoirs and salt-bearing formations. They have the ability to inhibit hydration expansion of mudstone and have a good effect of protecting oil and gas layers. They are mainly used in low-pressure, low-permeability Formation drilling and well completion construction process.

The invention aims to provide a pile casing device for hole formation in building foundation and a construction method of the building foundation by adopting the pile casing device. The pile casing device for hole formation in the building foundation comprises a pile casing body formed by a round steel pipe, and is characterized in that an impact cone is arranged at the bottom end of a pile casing, the lower half part of the impact cone adopts a cone whose diameter is larger than or equal to the outer diameter of the pile casing, the sharp corner of the cone faces downwards, the upper half part adopts a cylinder whose diameter is smaller than the inner diameter of the pile casing, and the upper half part of the impact cone is inserted into the casing body from the bottom end of the pile casing and fixed into a whole in the joint position through welding or casting or bolts. The construction method of the building foundation by adopting the pile casing device comprises construction steps as follows: 1), the pile casing device is used for construction of a pile hole; (2), the pile casing is lifted up to form the pile hole; (3), pile end treatment is performed according to soil property and upper load requirements; and (4) construction of a pile body is performed.

The invention provides a bore cleaning device for cast-in-place bored piles, which comprises a drill stem and an externally hung steel wire rope disposed on the same. The bore cleaning device enables the steel wire rope on the drill stem to rotate with the drill stem, such as an impeller to rotate, so that firstly, large mud pies in a cast-in-place bored pile can be broken to facilitate sludge settling and bore cleaning, and the efficiency of hole cleaning can be improved greatly; and secondly, under rotation of the impeller, such as the steel wire rope, the mud is mixed fully and generates impact to sweep the wall of a bore, the effect of mud wall protection is improved greatly, and bore forming quality and pile forming quality are improved. The bore cleaning device is simple to operate and saves construction period, so that the pile forming quality can be improved, and considerable economic benefit and social benefit are created for engineering.

The invention discloses a using method of slurry in crossing-with-directional-drilling of river construction. The method comprises the steps that the slurry is prepared according to formation conditions and diameter and length of crossing pipelines, and suitable slurry materials are selected; in a pipeline crossing process, time needed by the slurry and a drilling bit to reach different soil layers is calculated according advance speed of directional drilling, reaming, hold flushing and pipeline back-dragging in different soil layers and flow rate of the slurry, the slurry required by different soil layers is injected into a drill hole at preset times, the slurry returned from the drill hole is injected into a slurry circulation tank, and the slurry is returned to the drill hole and used after the slurry is processed. According to the method, effects of suspending, carrying, lubricating, hole fixing, leakage plugging and the like of the slurry are improved, and occurrences of phenomenons of hole collapse, formation leakage and the like are effectively avoided.

The invention discloses a mud suitable for the construction of an underground diaphragm wall. The raw materials for preparation include: 9%-11% of sodium bentonite, 2%-5% of soda ash, and 0.01%-0.04% of sodium carboxymethyl cellulose. , the remainder is water. The invention has the advantages of low cost and good mud wall protection effect.

The invention discloses an engaged retaining pile. The engaged retaining pile comprises a plurality of plain concrete piles laid from front to back and a plurality of reinforced concrete piles laid from front to back. The plain concrete piles and the reinforced concrete piles are laid in a staggered mode. A pile body of each reinforced concrete pile is engaged with pile bodies of two plain concrete piles located front and back, so that the retaining effect is good. The invention further discloses a construction method of the engaged retaining pile. The construction method comprises the steps that firstly, construction of the plain concrete piles is conducted, and the multiple plain concrete piles are constructed from front to back; and secondly, construction of the reinforced concrete piles is conducted, the multiple reinforced concrete piles are constructed from front to back in the construction process of the multiple plain concrete piles, drilled hole-forming construction processes of any one of the reinforced concrete piles are conducted after the construction of the two adjacent plain concrete piles front and back is completed. The construction method is simple; the design is reasonable and the construction is simple and convenient; the construction efficiency is high and the construction effect is good. In addition, the invention discloses an application of the engaged retaining piles, namely a foundation pit retaining structure is formed by fixedly connecting the multiple engaged retaining piles tightly.

The invention belongs to the field of building construction and particularly relates to a single-waist multi-leaf hose bit for a bored pile and a drilling construction method thereof. The technological process comprises the steps of positioning and sampling, centering in position, forming a hole, clearing the hole for the first time, descending a reinforcement cage, descending a guide pipe, clearing the hole for the second time and pouring concrete. The single-waist multi-leaf hose bit for the bored pile comprises a single-waist multi-leaf taper bit body. A positioning and guiding cylinder is fixedly welded to the end of the single-waist multi-leaf taper bit body. A plurality of positioning and guiding cylinder tungsten steel heads are distributed on a circumferential edge opening of one end of the positioning and guiding cylinder. The single-waist multi-leaf hose bit of the bored pile and the drilling construction method thereof have the advantages that the directivity is good, the hole forming perpendicularity is high, the wall protecting effect is good, deslagging is convenient, the hole forming speed is high, and the rock breaking speed is high.