46results about How to "Improve drillability" patented technology

The present invention provides a resin composition which can simply provide, with good reproducibility, a laminate, a printed wiring board, and the like that not only have excellent heat dissipation properties but have good moldability, good mechanical drillability and excellent appearance, and a prepreg, a metal foil-clad laminate, and the like using the same. A resin composition having a cyanate ester compound (A), an epoxy resin (B), a first inorganic filler (C), a second inorganic filler (D), and a molybdenum compound (E), wherein an average particle diameter ratio of the first inorganic filler (C) to the second inorganic filler (D) is in a range of 1:0.02 to 1:0.2.

The invention discloses a high-strength consolidation lost circulation additive, which consists of the following components in parts by weight: 20-40 parts of calcium carbonate, 5-10 parts of silicon dioxide, 1-4 parts of calcium chloride, 0.1-0.4 part of polyanionic cellulose, 0.1-0.2 part of an XC biopolymer, 5-10 parts of aluminum oxide, 3-8 parts of magnesium oxide and 10-16 parts of oil well cement. The lost circulation additive is prepared by carrying out the following steps: adding the components into a kneading machine based on the parts by weight at normal temperature and under normal pressure according to the conventional preparation method; mixing and stirring uniformly; drying; smashing into a powdery product being 0.01-0.2 millimeter in particle size. The high-strength consolidation lost circulation additive has the characteristics of wide raw material source, high strength, strong suspending power, high mobility, high pumpability, condensing and plugging capabilities, high minimum inflation performance, high solubility, high leakage plugging success rate, simple process and safety in construction, is widely applied to petroleum and geological drilling processes, and is particularly to be applied to fractured hard formations and karst cave formations.

The present invention provides a resin composition which can simply provide, with good reproducibility, a laminate, a printed wiring board, and the like that not only have excellent heat dissipation properties but have good moldability, good mechanical drillability and excellent appearance, and a prepreg, a metal foil-clad laminate, and the like using the same. A resin composition having a cyanate ester compound (A), an epoxy resin (B), a first inorganic filler (C), a second inorganic filler (D), and a molybdenum compound (E), wherein an average particle diameter ratio of the first inorganic filler (C) to the second inorganic filler (D) is in a range of 1:0.02 to 1:0.2.

A drillable reamer shoe having a reamer body and a nose section having a metallic cage containing a plurality of ceramic inserts made from silicon nitride or aluminum oxide. The drillable reamer shoe is positioned on an end of a flexible wellbore casing guide comprising a tubular body having a stiffness lower than a wellbore casing.

The present invention provides a novel surface-treated molybdenum compound powder and provides a prepreg, a laminate, a metal foil laminate, a printed wiring board, and the like that have a low thermal expansion coefficient in the planar direction, and excellent drillability, heat resistance, and flame retardancy. The surface-treated molybdenum compound powder of the present invention has at least part of the surface thereof coated with an inorganic oxide, and this is used as a filler.

A settable down hole includes a set of metal slips which include intersecting zones of weakness in the metal which fracture into a large set of pieces during setting of the tool so the pieces can be circulated out of a well without further reduction in size. One zone of weakness is a closed bore passage extending axially through one or more of the slip segments. An expander cone of increased hardness allows an increased angle on the expander cone and slips.

The invention relates to a vibrating bar-inserting long spiral air-cooled drilling rock-socketed pile forming method implemented in sub-hard rocks, soft rocks and weathered rocks, gravel soil layers or hard soil layers. The method comprises the following construction steps of: a, starting an air compressor, and discharging the compressed air from the air outlet of a long spiral rock-socketed drill bit by a blast pipe, a fluid director and an air pipe attached to a spiral drill rod; b, injecting the compressed air to cool the drill bit at the same time of long spiral drilling; c, reaching the designed hole depth; d, pouring concrete into the pile hole by using a concrete conveying pump; and e, vibrating and inserting a steel bar cage to the designed depth in a main rib pulled mode by adopting a vibrating hammer. Because the air can be continuously supplied to the drill bit, the drill bit is effectively cooled and the service life of the drill bit is greatly prolonged, and meanwhile, the drillability of the gas phase in the three-phase ratio of the soil is improved; therefore, the green construction technical process for a vibrating bar-inserting drilling pressure pouring pile can be adopted in the sub-hard rocks, the soft rocks and the weathered rocks, the gravel soil layers or the hard soil layers; and the method increases the quality reliability, reduces the consumption of various materials and improves the construction efficiency, so the method has remarkable economic benefit and social benefit.

Provided herein is a carrier-attached copper foil having desirable laser drillability through an ultrathin copper layer, preferred for fabrication of a high-density integrated circuit substrate. The carrier-attached copper foil includes an interlayer and an ultrathin copper layer that are provided in this order on one or both surfaces of a carrier. The surface roughness Sz and the surface roughness Sa on the interlayer side of the ultrathin copper layer satisfy Sz≤3.6 μm, and Sz / Sa≤14.00 as measured with a laser microscope in case of detaching the carrier from the carrier-attached copper foil according to JIS C 6471 after the carrier-attached copper foil is laminated to an insulating substrate from the ultrathin copper layer side under a pressure of 20 kgf / cm2 and heated at 220° C. for 2 hours. GMD, which is a 60-degree glossiness of the ultrathin copper layer surface on the interlayer side in MD direction, satisfies GMD≤150 in case of detaching the carrier from the carrier-attached copper foil according to JIS C 6471 after the carrier-attached copper foil is laminated using the same procedure.

The invention discloses a leakage-proof leak-stopping reinforcing agent, which is prepared from the following components in parts by weight: 3 to 12 parts of sodium silicate; 1-6 parts of potassium silicate; 10 to 20 parts of calcium silicate; 0.1 to 0.5 part of polyacrylamide PAM; 10 to 25 parts of calcium hydroxide; 0.1 to 1 part of low viscosity polyanionic cellulose PAC-LV; 0.1 to 1 part of water-soluble polyamide resin powder; 2-6 parts of water-soluble urea formaldehyde resin powder. A preparation method comprises the following steps: sequentially adding the above substances into a container according to the components and contents at normal temperature and normal pressure by using a conventional preparation method, uniformly mixing and stirring, and drying, crushing or sieving to obtain a granular product with the particle size of 0.05-0.8 mm. The preparation method has the advantages that the raw materials are widely avaiable; the process is scientific and simple, constructionis safe, and certain coagulation capacity is achieved; single particles are solidified together; on the basis of early-stage filling, the setting and consolidation performance of leakage well walls can be improved, the leakage stratum well walls can be reinforced, the good characteristic of repairing broken easily-leaked stratum well walls is achieved, the compounding performance with different types of plugging slurry is good, the repairing and reinforcing performance of the plugging slurry is achieved, and the leakage-proof leak-stopping reinforcing agent can be widely applied to petroleum and geological drilling engineering.

The invention discloses an automatic grouting float collar and float shoe. Casing pipe threads are machined at the upper and lower ends of a float collar body (1) or the upper end of a float shoe body (1) and connected with petroleum casing pipes, a guiding cap is installed at the lower end of the float shoe body (1), a stop valve seat (2) is connected to the inner wall of the body (1) through a straight thread, an inclined surface is machined at an inner hole of the stop valve seat (2) as a sealing surface, a stop valve (3) is installed below the stop valve seat (2), the sealing face of a valve body is a spherical surface, a shearing mechanism (4) and a flow control valve (6) are fixedly connected to the portion, on the inner wall of the body (1), below the stop valve seat (2) through high-strength concrete (7) in a sealed mode, the flow control valve (6) is located below the shearing mechanism (4), and an alloy ball (5) is thrown into the shearing mechanism (4). In drilling operation, automatic grouting and automatic flow-limiting designing are performed, in this way, it is effectively avoided that in the process of lowering the casing pipes, surging pressure causes lost circulation, and the product is good in drillability, resistant to corrosion and good in well-cementation quality.

The invention discloses a crown and a steel junction surface of a hierarchical internal cone shaped vortex-type centering pilot diamond impregnated wire line coring geological bit with symmetrical pigeon-toed toes in and a manufacturing method of the bit. The bit comprises a working layer of the diamond bits, a bit steel body, middle isolation scraps and connecting layer materials. The bit has the following beneficial effects: assembly and configuration of the whole set of bit tools of the bit designed in the invention take pairing of each pair of bit tools as the pigeon-toe forming mode; the pairing formula of the bit tools is characterized by female / male layering, symmetry and balance; the bit tools are positioned, arranged and seated to form the internal cone shape; the situation of layered distribution and preset synchronous diminishing of the bit tools forms the preset function of using gentle methods and force; the crown is shaped like vortex-type cone-preserving pigeon-toe (the preset pigeon-toe is transient equilibrium buffer and synchronous compensation in place of dynamic landing of the bit); the vortex-type pilot centering force is continuously obtained and the continuous vortex-type pilot centering force is the concept of the pigeon-toed toes in; the toes in are effective restraints for controlling advance; the toes in need to control the vertical effective latitude of the bore diameter when being applied in the drilling bit; and the mode of cushioning the toes in with pigeon-toes to control centering pilot is taken as the first key point.

The invention discloses a drillable ball injection sliding sleeve for oil-gas well staged fracturing, which comprises an upper main body, a middle main body, a lower main body, a movable sleeve arranged on the inner side of the middle main body, wherein the movable sleeve is connected with the middle main body through a shear pin; a locating clamp spring is mounted in a cavity between the movable sleeve and the middle main body; a guide groove is arranged on the outer side of the movable sleeve; a guide pin is arranged on the middle main body and extends out of the bottom of the guide groove into the guide groove; a drillable ball seat is mounted on a boss formed at the bottom part of the movable sleeve; a low density ball is arranged in the drillable ball seat in a setting manner; guide pipes extending downwards are arranged at the lower ends of the upper main body and the movable sleeve respectively; circulation openings are formed at the upper part of the middle main body; and a plurality of communication openings are formed at corresponding positions on an extension pipe of the upper main body; and the distance between the upper end of the movable sleeve and the lower part of the communication openings is equivalent to that between the lower end of the movable sleeve and the upper end of the lower main body. Through the sliding sleeve, the selective fracturing reformation and commingled production can be realized without moving pipe columns, meanwhile fracturing at each layer is performed in sequence, the operation risk is low, and the fracturing construction time is greatly reduced.

It is an object to provide a prepreg for a printed laminate that has a low thermal expansion coefficient in the planar direction, excellent drillability, and further excellent heat resistance and flame retardancy, and a laminate and a metal foil-clad laminate. A resin composition according to the present invention includes a molybdenum compound (A); an epoxy resin (B); a curing agent (C); and an inorganic filler (D), wherein a Mohs hardness of the inorganic filler (D) is 3.5 or more, and a content of the inorganic filler (D) is 40 to 600 parts by mass based on 100 parts by mass of a total of resin solid components.

The invention discloses a novel fixed point area control grouting device which comprises an auxiliary pipe, a grouting pipe and an injection hole formed in the grouting pipe. The injection hole is circular or oval or square or rectangular. One end of the grouting pipe is conic. The grouting pipe is directly inserted into the auxiliary pipe and located in the auxiliary pipe expect for the conic end. The gradient between the end of the auxiliary pipe and the horizontal plane is 15 degrees to 30 degrees. The novel fixed point area control grouting device has the advantages that a key point weak area can be directly reinforced, the re-drilling amount is reduced, the frequency of occurrence of drill holding accidents is greatly reduced, a construction period is shortened, the grouting cost is saved, and the grouting effect is improved; the novel fixed point area control grouting device is simple in structure and suitable for being manufactured in a site, the grouting pipe can be recycled, a plastic pipe is low in price, and the cost of the novel fixed point area control grouting pipe is remarkably reduced; the auxiliary pipe remaining in a drill hole is good in drillability, the drill hole can be reused, and following drill hole construction is not influenced.