160results about How to "Improve cementing performance" patented technology

The invention relates to a plugging agent suitable for large leakage, its preparation method and a leaking stopping technology. The invention is suitable for repeatable large leakage, belonging to the field of petroleum drilling. The plugging agent comprises the following ingredients by the following weight ratio: clear water: HSD (HHH): HD-1: HD-2: LD-102: DF-A: barite = 100: 12-15: 4-5: 7-8: 4-5: 30. According to the invention, by reinforcing the interaction among ingredients, maximizing the structural strength of the plugging agent entering a leak layer, maintaining the trend that the leak layer is gradually enhanced with time after injecting the plugging agent in the leak layer, and further increasing the pressure bearing capacity of the leak layer, the leakage problem of a repeatable return-lost large-scale absorption well can be solved, the problem of leaking stopping existing in the prior art can be overcome, and the one-time leak stopping success rate is increased.

The invention discloses a super-elevation pumping marine concrete. The super-elevation pumping marine concrete is prepared from cement, fly ash, mineral powder, gravel, river sand, a hydration temperature rising regulation and control material, a corrosive ion transport inhibitor, a state modified material, an ultra dispersed water reducing shrinkage plasticity-maintaining additive and water in proportion. According to the super-elevation pumping marine concrete, by means of the hydration temperature rising regulation and control material, cracking caused by low high performance concrete, insufficient hydration and drying shrinkage in later period can be effectively avoided; by means of the hydration temperature rising inhibiting component, adiabatic temperature rising of the concrete can be lowered, and cracking generated by the temperature stress is reduced; by adopting the corrosive ion transport inhibitor, the pore structure of the concrete can be optimized, transport paths of ions such as Mg<2+> and Cl<->, and the concrete is better served in marine salt spray environment; the state modified material has the specific ball effect and water retention characteristic, and the phenomena of segregation and pipe blocking occurring in the super-elevation pumping process are avoided. The concrete is suitable for super-elevation pumping marine buildings and has the important engineering application value.

The invention discloses an asphalt resin-based cold regenerant and a regenerated mixture. The cold regenerant is composed of a resin emulsion, cement, a phase agent having dissolving and mixing effects for waste asphalt and the rubber emulsion, an aggregate surface hydrophobic agent and a curing agent of the resin emulsion. The resin emulsion, the phase agent and the cement are used as main components. Each of the components co-increases cementing property for the aggregate. When the cold regenerant is in use, a binding material is a multi-phase system formed by intertwining dissolved and activated regenerated asphalt, the cured resin emulsion and a cement hydration product. The system is stable and has good binding property, and can overcome the main damage problems of high temperature softening deformation, low temperature brittle rupture and stripping of the binding interface eroded by water, of a single asphalt binding material. The regenerated mixture formed by the cold regenerant can be directly paved by vibration without roll compaction. Application efficiency is relatively high while cost is relatively low. A formed road surface has high strength and small temperature sensitivity, and can resist ageing and water erosion.

The invention discloses an efficient erosion-resistant anti-gas-channeling cement paste system. The efficient erosion-resistant anti-gas-channeling cement paste system is characterized by being prepared from the following raw materials in parts by weight: 60-80 parts of erosion-resistant anti-gas-channeling cement, 2-4 parts of butadiene-styrene latex or polyimide latex or silicon dioxide / water mixed suspension, 0.2-2 parts of AMPS polymer fluid loss control agent, 0.05-0.2 part of polycarboxylic acid ether ester dispersing agent, 0.1-2 parts of chlorine-free aluminate complex accelerator, 0.1-0.5 part of organic phosphate retarder, 0.1-0.2 part of organic silicon defoaming agent and 20-30 parts of distilled water. According to the invention, the special functional materials are doped, so that the set cement is always kept in a proper alkaline environment, and a liquid-phase acidic medium is prevented from entering the set cement; the doped special functional materials ensure that the set cement has favorable mechanical properties; and the compactness of the set cement is increased, the toughness of the set cement is improved, and the bonding property and the sealing property between a cement sheath and a stratum are enhanced.

The invention relates to water-permeable concrete having a temperature-sensing color-changing function. The water-permeable concrete comprises, by mass, 250-300 parts of silicate cement, 20-30 parts of enhancing component, 1500-1700 parts of pebble, 105-115 parts of water, 4-7 parts of water reducer and 15-25 parts of temperature-sensing color-changing material. Compared with the prior art, the water-permeable concrete has the advantages that when outside temperature changes, color changes along with changing of temperature within a certain interval, so that good decorating effect is realized. Needed raw materials are simple and easy to obtain, and the water-permeable concrete does not need special preparation process and is high in economic efficiency and convenient for popularization.

The invention discloses a process for improving bearing capacity of a formation. The process for improving the bearing capacity of the formation comprises the following steps of: a, working out respective sizes of formation pores according to formation fracture data obtained by block coring, and preparing different sealing slurry by using gel and sealing particles of corresponding dimensions according to the respective sizes of the formation pores; b, pumping the prepared sealing slurry into a shaft, and closing a blowout preventer after the sealing slurry is full of the shaft; c, continuously pumping the sealing slurry into the shaft to enable the sealing slurry in the shaft to be extruded into the formation; and d, respectively building frameworks at the formation pores by rigid sealing particles in the manner of bridging, filling and compacting flexible sealing particles among the rigid sealing particles to fill pores near the formation of the shaft to the greatest extent so as to enable the casing pressure value of the blowout preventer to be increased continuously, therefore improving the bearing capacity of the formation. According to the process for improving the bearing capacity of the formation, bearing sealing is performed on the formation in advance, through the formation fracture data obtained by the block coring, the sealing is performed on the formation by using the chemical gel which is equivalent to formation porosity and the rigid and flexible sealing particles when drilling is performed, and therefore, the bearing capacity of the formation is artificially improved, the phenomenon that drilling fluid leaks from the formation due to the fact that drilling fluid density rises at the later stage of construction is prevented, and drilling construction can be smoothly performed.