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

The present invention discloses one kind of high temperature recyclable microbubble drilling and completing fluid, which includes basic slurry comprising bentonite 1-2 (in weight portions, the same below), salt tolerant clay 3-5, sodium carbonate 0.2-0.3 and water 100; and additives comprising high temperature inhibitor 3-5, high temperature tackifier 2-5, high temperature filter loss reducing agent 3-6, high temperature salt resisting filter loss reducing tackifier 1-3, flow form regulator 1-3, high temperature foaming agent 2-5 and high temperature foam stabilizer 1-2.5. The high temperature recyclable microbubble drilling and completing fluid has excellent high temperature performance, high carrying, suspending capacity in low pressure deep well, and functions of inhibiting the hydrating expansion of mudstone and protecting oil and gas reservoir, is suitable for different types of high temperature stratum. It is applied in well drilling and well completing construction for low pressure and low permeation stratum.

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.

The invention relates to ultra-low temperature resistant calcium-based low-solid drilling fluid for drilling in permafrost or severe cold areas. The ultra-low temperature resistant calcium-based low-solid drilling fluid is composed of 100 parts of water, 10-30 parts of calcium chloride, 1-10 parts of multifunctional complexing agent, 0.5-2.0 parts of viscosity reducer, 0.1-1.0 parts of filtrate reducer, 1-5 parts of lubricant and 1-3 parts of antifoaming agent. The drilling fluid provided by the invention has good rheological property in an ultra-low temperature environment and quite good wall protection capability and carrying ability, thereby providing a technical support for drilling constructions in permafrost and severe cold areas in winter of our country.

The invention discloses a pile foundation hole cleaning device, which includes an air compressor, an air supply pipe, a conduit, an air lift reverse circulation guide cover and a sedimentation tank. One end of the air supply pipe is connected to the input port of the air compressor, and the other end is inserted into the conduit , the conduit is set in the pile hole to be cleaned, the pile hole is provided with chemical slurry, the upper port of the conduit is connected to the sedimentation tank through the slag discharge pipe, the outlet of the slag discharge pipe is provided with a pressure gauge, and the slag discharge pipe and the sedimentation tank are provided with a The first filter screen, the sedimentation tank is connected to the pile hole through the grout filling pipe, the second filter screen is set between the sedimentation tank and the grout filling pipe, the upper port of the conduit is connected to the gas lift reverse circulation guide cover, the air supply pipe and the slag discharge pipe are both It is installed in the hole of the gas lift reverse circulation shroud, wherein the internal sectional area of ​​the conduit is smaller than the annular sectional area between the external wall of the conduit and the pile wall. The invention has simple structure and process, low cost, high hole cleaning efficiency and good hole cleaning effect.

The invention discloses an upper-soft lower-hard ground subway station foundation pit support system and a construction method thereof. The support system comprises a building envelope distributed on the outer side of a constructed subway station foundation pit and a middle supporting structure distributed in the middle of the inner side of the subway station foundation pit. The middle supporting structure comprises a plurality of digging piles distributed from front to back. The digging piles are steel pipe concrete piles, and each steel pipe concrete pile comprises a steel pipe supporting column, a middle joint structure and a lower joint structure. The construction method comprises the steps that the building envelope and the middle supporting structure are constructed correspondingly; and when the middle supporting structure is constructed, the multiple digging piles in the middle supporting structure are constructed from front to back correspondingly, and when the drilled piles are constructed, the process comprises the following steps of firstly, pile hole excavation, secondly, steel pipe column hoisting and thirdly, concrete pouring. According to the upper-soft lower-hard ground subway station foundation pit support system and the construction method, design is reasonable, construction is easy and convenient, and the use effect is good; the upper-soft lower-hard ground subway station foundation pit can be effectively supported; and stability in the foundation fit excavation process and stability generated after foundation fit excavation is completed are ensured.

The invention discloses a steel plate and concrete diaphragm wall and a construction method thereof. The steel plate and concrete diaphragm wall is formed by buckling a plurality of steel plate and concrete diaphragm wall units end to end. Each steel plate and concrete diaphragm wall unit comprises an externally-wrapping steel plate barrel, concrete poured inside the corresponding externally-wrapping steel plate barrel, and shearing-resistant pins arranged on the inner side of a main steel plate body of the corresponding externally-wrapping steel plate barrel. Each externally-wrapping steel plate barrel is a cuboid sleeve which is composed of two main steel plate bodies, a straight steel plate body and a steel plate body with the two ends being provided with hooks. According to the steel plate and concrete diaphragm wall and the construction method thereof, construction cost is lowered, pollution is avoided, and there is no need to assemble reinforcement cages on the site, so that time and labor are saved; moreover, the concrete is poured inside each sleeve, and thus the pouring quality can be guaranteed easily.

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 provides a rotary excavating and drilling half-hole mud wet-method hole formation process of a collapsible loess super-length large-diameter pile foundation and belongs to the technicalfield of pile foundation rotary excavating and drilling hole formation. The process comprises the following steps: confirming pile foundation rotary excavating and drilling half-hole mud wet-method hole formation conditions, flattening a field, burying protection barrels, making mud, drilling holes, cleaning the holes, manufacturing reinforcement cages, mounting the reinforcement cages, mounting guide tubes, and grouting concrete. According to the half-hole mud wet-method hole formation process provided by the invention, dry-method mud-free hole formation is implemented in an upper crack sinkhole development section, a rapid speed can be achieved, a hole wall can be extruded by a drilling hopper, and the hole wall stability can be improved; mud wall protection wet-method hole formation isimplemented in a lower part, hole collapse can be effectively prevented, and a hole formation speed can be ensured; a good mud wall protection effect can be achieved, remarkable effects in reducing hole collapse and the like can be achieved, and the security can be easily ensured; holes can be cleaned through bottom blowing and slag turnover and positive circulation of high pressure water, or bydoping mud or clean of a low density at the hole bottoms to directly dilute the mud, slag settled at the hole bottoms can be completely cleaned off, the possibility that the settled slag is mixed withthe mud in pile foundation concrete can be reduced, and the quality can be easily ensured.

The invention discloses slurry for hole drilling and wall protection. The slurry is prepared from the following components: water, bentonite and an admixture according to the mass ratio of (8 to 14) to (0.8 to 1.2) to 0.01, wherein the admixture is prepared by mixing water, sodium bentonite, polyaluminum chloride and sodium carbonate according to the ratio of (600 to 800ml) to (60 to 80g) to (1.4to 1.65g) to 1.54g. The slurry disclosed by the invention has a good wall protection effect; the slurry is uniform and the viscosity ratios of upper and lower layers are the same; the inner part of asand layer is drilled in a rotary manner and hole collapse is not caused; and the slurry has suitable viscosity and does not cause a drill pasting phenomenon.

The invention discloses an excavation construction technology for a subway station foundation pit in upper-soft lower-hard ground. The excavation construction technology is characterized in that a middle support structure is arranged in the middle of the constructed subway station foundation pit; a retaining structure of the constructed subway station foundation pit comprises an upper-part retaining structure, a middle-part retaining structure and a lower-part retaining structure; a lower-part foundation pit is divided into an upper foundation pit and a lower foundation pit; the middle support structure comprises a plurality of dug piles; the dug piles are concrete-filled steel pipe piles; and each concrete-filled steel pipe pile comprises a steel pipe support pillar, a middle joint structure and a lower joint structure. The excavation construction of the subway station foundation pit comprises the following steps: A, synchronous construction of the middle support structure and the upper-part retaining structure; B, excavation of an upper-part foundation pit; C, construction of the middle-part retaining structure; D, excavation of the upper foundation pit; and E, excavation of the lower foundation pit. The excavation construction technology is simple in step, reasonable in design, simple and convenient in construction and good in using effect, and ensures that the excavation construction process of the subway station foundation pit in the upper-soft lower-hard ground can be simply, conveniently and quickly completed and is safe and reliable.

The invention discloses a hole cleaning device for a cast-in-situ bored pile. The hole cleaning device comprises a drill pipe. At least one stirring paddle is installed on the drill pipe and composed of blades and a paddle hub, wherein the paddle hub surrounds the drill pipe in a hooped mode, the number of the blades is at least two, and the blades are fixed to the paddle hub with the blade surfaces facing upwards. During primary hole cleaning of positive circulating rotation, the drill pipe drives the stirring paddles fixed to the drill pipe to rotate, and in combination with the idling of a drill bit, dregs arising from the pile bottom are effectively and gradually pushed upwards, so that the carrying efficiency of the dregs is improved, the thickness of the dregs is lowered, and the hole cleaning efficiency and the bearing capacity of a pile foundation are improved. Meanwhile, the concentration of sludge at the pile bottom is high, the sludge pushed upwards by the blades has a painting function on a hole wall, the circulation speed of the sludge is increased due to the lifting function of the blades, formation of a sludge cover is accelerated, and occurrence of a hole collapse phenomenon is reduced. The hole cleaning device for the cast-in-situ bored pile is simple in structure, convenient to operate, high in dreg cleaning efficiency, high in dreg cleaning depth, good in economic benefit, and obvious in effect during hole cleaning for the ultra-deep cast-in-situ bored pile.

The invention discloses a construction method of a bored pile in sand seam geology, application of chemical sludge dado to the same, and a pile foundation, and relates to the technical filed of building operations so that the problems that collapsing holes, broken drill points or drill stems are likely to happen in the existing bored pile in sand seam geology construction process can be improved. The construction method of the bored pile in sand seam geology can guarantee that the chemical sludge dado has fine effect protective shelter, prevent the collapsing holes, effectively cool drill bits and lubricate drilling tools, and reduce the problems of broken drill points or drill stems so that it is guaranteed that drilling work can go on smoothly. The application of the chemical sludge dado in the construction method of the bored pile in sand seam geology are also provided, so that construction progresses and construction quality are effectively ensured, construction risks are reduced, economic benefits and social benefits are significantly increased, and accordingly the chemical sludge dado is suitable for popularization and application. A pile foundation obtained through the method is also provided. The integrity of the foundation pile is tested by ultrasonic testing, which shows that the foundation pile is I-grade pile and has good construction quality.

The invention discloses a mud circular disposing device and a using method thereof. The mud circular disposing device comprises a mud storage case and a three-way mud inlet pipeline, a roller type filter sieve opening and a clay stirring barrel opening are formed in the mud storage case, a roller type filter sieve is mounted at the roller type filter sieve opening, a clay stirring barrel is arranged below the clay stirring barrel opening in the mud storage case, and a mud stirrer is further mounted on the mud storage case; and the three-way mud inlet pipeline comprises a pipeline inlet, a first pipeline outlet and a second pipeline outlet, a three-way valve is mounted on the three-way mud inlet pipeline to control the pipeline inlet to communicates with the first pipeline outlet or the second pipeline outlet. The mud circular disposing device is assembled in a prefabricated mode, is used circularly and good in maneuvering performance, and simple in using method and can dispose the mud containing large granule gravel-cobbles and the mud containing clay chunks, the mud is almost free of wasting in the circular disposing process, mud consistency can also be adjusted to enable the mud to be used for a dado, a mud channel is isolated from the ground, seepage loss of mud water in the reflowing process is avoided, and water saving and environmental friendly effects are achieved.

The invention discloses a mud cake toughening improver for a drilling fluid. The mud cake toughening improver is prepared from, by weight, 60-80 parts of modified starch, 20-45 parts of cellulose, 35-50 parts of synthetic resin, 5-20 parts of a toughening additive and 15-30 parts of lignin. The invention also discloses a preparation method of the mud cake toughening improver for the drilling fluid. The method comprises the following steps that the cellulose and 1/3 modified starch are stirred and mixed uniformly, then the synthetic resin is added, stirring is performed for 40-60 min at 85-120DEG C, the rotation speed is 4500-6000 r/min, the lignin and the remaining 2/3 modified starch are added, stirring is performed for 1.5-2 h, the rotation speed is 3000-4000 r/min, then the temperatureis adjusted to 70-110 DEG C, the toughening additive is added, stirring is performed for 4-5 h, drying is performed, and the mud cake toughening improver is obtained. The mud cake toughening improverhas the advantages that when the prepared mud cake toughening improver is applied to the drilling fluid and then acts, a formed mud cake is thinner and more tough, and the wall protection performanceis more excellent.

The invention discloses a sleeving type underground conveying device for tailing paste filling. The sleeving type underground conveying device comprises a drilling sleeve fixedly sleeved with a drilled hole and a slurry filling pipe sleeved with the drilling sleeve. The top of the slurry filling pipe is lifted by a lifting mechanism. An underground chamber is constructed at the lower portion of the drilled hole and internally provided with a slurry buffering cavity. The slurry buffering cavity communicates with the bottom of the slurry filling pipe through a flange. One side of the slurry buffering cavity is connected with a downhole filling pipe through a flange. By means of the sleeving type underground conveying device for tailing paste filling, due to the sleeving structural form of the drilling sleeve and the slurry filling pipe, the slurry filling pipe does not make direct contact with the drilled hole, when the slurry filling pipe is abraded to leak, the slurry filling pipe canbe replaced without damaging the drilled hole, the permanent use of the drilled hole is ensured, and filling cost is effectively saved.

The invention belongs to the technical field of drilling, and provides marine quaternary formation drilling fluid. The fluid is prepared from, by weight, 1000 parts of water, 50-70 parts of bentonite,1-5 parts of alkali, 0.1-1 part of fluid loss additive, 0.1-2 parts of thickener and 0.1-2 parts of acrylic grafted starch copolymer. The invention further provides a method for preparing the marinequaternary formation drilling fluid and application thereof in the drilling and core removal process of the marine quaternary formation. The marine quaternary formation drilling fluid has excellent wall protection performance, and in the process of open hole core removal of the marine quaternary loose formation, the problems that hole walls of sand formation easily collapse, sand gushing and drillbit burying occur, hole walls of water-sensitive muddy formation are reduced in diameter, the bottoms of holes are not clean and the like are better solved.