52results about How to "Improve the setting effect" patented technology

The invention provides an island-fixed type sea-island short fiber, the island component of the island-fixed type sea-island short fiber is polybutylene terephthalate, and the sea component is alkali-soluble polyester. The present invention also provides a method for preparing the sea-island short fiber, comprising: melting the island component in a first screw extruder; melting the sea component in a second screw extruder; The molten body of the first screw extruder and the molten body of the second screw extruder are extruded through the spinning assembly to obtain nascent sea-island fibers; the nascent sea-island fibers are sequentially cooled, oiled, drawn, After crimping, loosening and setting, cut to obtain island-fixed short fibers. The PBT superfine fiber fabric prepared by adopting the island-fixing type sea-island short fiber provided by the invention has soft texture and good elasticity, and can be dyed under normal pressure conditions.

The invention provides a two-component split type composite FDY fiber which is characterized in that he two components in the two-component composite DTY fiber are a polyester component and a polyamide component, wherein the polyester component is selected from one or more of polytrimethylene terephthalate, polybutylene terephthalate and cation normal-pressure dyeable polyester. The invention also provides a preparation method for preparing the split type composite FDY fiber, which comprises the following steps: respectively melting the polyester component and the polyamide component, then carrying out extrusion molding through a spinneret plate, cooling, applying oil, drafting and winding to obtain the two-component split type composite FDY fiber. The composite FDY fiber and the two-component superfine fiber fabric which are prepared by the method have the characteristics of good dyeing property and soft texture.

The invention relates to a self-seal-examining slip packer, and belongs to the field of oil-gas well operation downhole tools. The packer is composed of an inner center tube, an outer center tube, a slip and a slip sheath; an upper connector is installed at one end of the inner center tube through threads, a lower connector is installed at the other end of the inner center tube through threads, an inner piston sleeve, a releasing claw and the outer center tube are sequentially installed on the portion, between the upper connector and the lower connector, of the inner center tube, a balance connector is installed at one end of the inner piston sleeve through threads, an upper lining and a lower lining are sequentially installed on the portion, at the other end of the balance connector, of the inner piston sleeve, and a bypass connector is arranged between the upper lining and the lower lining; an upper guide ring is installed on the portion, at one side of the bypass connector, of the upper lining. Double packer element sealing is adopted in the packer in the setting process, sealing performance in the setting process is ensured, and the self-seal-examining slip packer is safer and more reliable, has the advantages of being easy and fast to operate and meets the requirement for blocking and partitioning an oil-string casing in oil field production.

The invention discloses an epoxy resin-based composite shape-stabilized phase change material and a preparation method and application thereof. The epoxy resin-based composite shape-stabilized phase change material is prepared from 40-55% by mass of cured epoxy resin, 45-60% by mass of a phase change material and 0-10% by mass of a heat conduction material through a casting molding method, and a curing agent accounts for 33-36% of the cured epoxy resin. Due to good compatibility of the phase change material and epoxy resin and a polymer matrix with a three-dimensional cross-linked network structure formed after the epoxy resin is completely cured, the phase change material has the characteristics of excellent high-temperature resistance, solid-solid phase change and easiness in processingand preparation; the phase change material is converted from a crystalline state to an amorphous state, so that the material realizes the functions of heat absorption and energy storage; by adding theheat conduction material, the heat conduction property and the shape-stabilized property of the composite shape-stabilized phase change material are improved. The epoxy resin-based composite shape-stabilized phase change material is filled into an iQOS matched cigarette cooling section in the form of particles, so that the smoke temperature of the front one to three filter tip ends can be remarkably reduced.

The invention provides a combined integrated oilfield packer, and relates to the technical field of oil and gas development. The combined integrated oilfield packer comprises a supporting assembly, a setting mechanism and an unsealing mechanism, wherein the supporting assembly comprises a central pipe, joints, a connecting ring, an adjusting cylinder, a first through hole and second through holes; the top end and the bottom end of the central pipe are fixedly connected with the joints; the outer side of the middle of the central pipe is fixedly connected with the adjusting cylinder; the second through holes are formed in the left side and the right side of the lower portion of the central pipe; the setting mechanism is matched with a centering mechanism and a rotating assembly to perform setting on the packer; and the unsealing mechanism is used for unsealing the packer. Oil liquid is injected into the central pipe, so that the oil liquid is pressed into the centering mechanism through the first through hole, and the centering mechanism is used for centering the packer; and meanwhile, the rotating assembly and the supporting assembly are matched with the centering mechanism to enable the setting mechanism to work, so that setting is completed, and the packer is convenient to center and set.

The invention discloses a non-throttling Y344 type fracturing set packer. The non-throttling Y344 type fracturing set packer comprises an upper connector, a rubber barrel, a slide block center pipe, a power slide block, a spring center pipe, a spring, a spring driving shell, a hydraulic cavity, an air cavity and a sealing ring. The inner diameter and the outer diameter of the sealed air cavity and the inner diameter and the outer diameter of the hydraulic cavity communicating with the center pipe are maintained to be the same so as to ensure that the area of the interaction force is the same. In the construction process, differential pressure exists between the air cavity and the hydraulic cavity and is a power source for achieving set packing of the rubber barrel. The set packing mode of the rubber barrel is only related to pressure inside a pipe column and not influenced by the differential pressure of the inside and the outside of the pipe column and the flow quantity and the flow velocity of liquid inside the pipe column, and set packing is achieved without sandblaster throttling. Therefore, the set packer can provide a possibility for large displacement sandblasting of the sandblaster. When the sandblasting amount of the maximum drift diameter of the set packer is achieved, due to the fact that the drift diameter is increased, the flow velocity of liquid containing sand inside a tool is decreased, and abrasion to an assembly in the pipe column is reduced; accordingly, the service lift of the tool is prolonged, the use security is improved, and the working efficiency and the construction quality are improved.

The invention discloses a novel horizontal directional drilling crossing percussive rotary drilling method, and belongs to the technical field of oil and gas pipeline horizontal directional drilling crossing and oil gas drilling and production. According to the novel horizontal directional drilling crossing percussive rotary drilling method, a loose stratum area can be determined after explorationand analysis of a crossing terrain, an existing drill rod is equipped with a corresponding number of retractable setting rods, after drilling to the loose stratum area, the retractable setting rods go deep into an upper terrain and trigger and unfold setting action by launching the retractable setting rods vertically upward, a plurality of setting triggering hands extend from the retractable setting rods to the surrounding area, the gripping force of the terrain is improved, effective connection of upper and lower areas of the loose stratum is realized, the stability of drill hole walls is improved, the risk of hole collapse is obviously reduced, the terrain strength near a pipeline is improved when the pipeline is reamed and dragged back, the risk of pipeline settlement is reduced, and the safety and stability of construction are greatly improved.

The invention provides a continuous casing running operation circulation device which comprises a borehole and a casing. The casing, a special nipple and a float collar form a casing string, the lower ends of the special nipple and the float collar are sequentially connected, the casing string is positioned in the borehole, a continuous tube is arranged in the casing, a packer is connected at the lower end of the continuous tube and positioned in the special nipple, a one-way valve is arranged between the packer and the continuous tube, and an inner cavity of the special nipple is (good in smooth finish and sealing effect). When a pump is started to circulate on the ground, well drilling liquid reaches a well bottom through the continuous tube, the one-way valve and the packer and returns to a well mouth from an annular space between the borehole and the casing, so that underground circulation is finished, the device can realize halfway circulation, the inside of the casing cannot be completely filled with the well drilling liquid, and the actual load of the casing string cannot be increased.

The invention discloses an efficient pneumatic jewel channel-setting device. The efficient pneumatic jewel channel-setting device comprises a CNC numerical control machine for processing a jewel position hole and a jewel position channel and a channel-setting device body for channel setting of a jewel on the workpiece surface. The CNC numerical control machine comprises a machine base 1, an X driving shaft 2 and a Y driving shaft 3, a worktable 4 located on the upper surface of the machine base and driven by the X driving shaft 2 and the Y driving shaft 3 to perform horizontal displacement, a supporting column 5 fixedly installed on the machine base, a Z driving shaft 6 installed on the supporting column and a drill mouth 7 installed on the Z driving shaft and driven by the Z driving shaft to perform vertical movement, wherein the X driving shaft 2 and the Y driving shaft 3 are installed on the upper surface of the machine base. The channel-setting device body comprises a base 8, a lower die 9 installed on the base, a guide column 10 installed on the base, a column 11 installed on the base, an air cylinder 12 installed on the column and an upper die 13 driven by the air cylinder and performing vertical motion along the guide column. The efficient pneumatic jewel channel-setting device has the advantages of achieving full-automatic processing and channel setting and being high in working efficiency.

The invention provides an arc-shaped battery cell with a shaping structure and an arc-shaped lithium battery. The arc-shaped battery cell with the shaping structure comprises a first shaping part and a second shaping part, the first shaping part and the second shaping part are both wound on the surface of the arc-shaped battery cell, the extension direction of the first shaping part is parallel to the radian direction of the arc-shaped battery cell, and a preset included angle is formed between the extension direction of the second shaping part and the radian direction of the arc-shaped battery cell. The first shaping piece and the second shaping piece intersect to form an intersection node, and the first shaping piece and the second shaping piece are connected to the intersection node. The arc-shaped battery cell with the shaping structure is relatively good in shaping effect, high in stability and relatively strong in shaping durability.

The invention relates to a gear shaft fixing and repairing device, the device comprises a supporting frame, a positioning stop device and a connecting device, wherein the supporting frame comprises asupporting base, fixing support frames and supporting brackets, the fixing support frames are connected with the supporting base, the supporting brackets are arranged on the fixing support frames, thepositioning stop device comprises an adjustor, a base plate, a connecting block and a positioner, the adjustor and the positioner are both installed on the base plate, the connecting block is arranged between the adjustor and the positioner, the connecting device comprises an adjusting device, a positioning rod and a connecting rod, the adjusting device is connected with the supporting frame, thepositioning rod is arranged on the adjusting device, one end of the connecting rod is connected with the positioning rod, and the other end of the connecting rod is connected with the adjuster on thepositioning stop device. The gear shaft fixing and repairing device is high in adaptability, capable of achieving rapid positioning, convenient to adjust and use, good in fixing effect, capable of improving the gear shaft repairing operation efficiency and the site utilization rate, safe, reliable and capable of avoiding safety accidents caused by stability damage in the repairing operation process.

The self-adaptive forming piece clamping ring comprises a ring body, the ring body is provided with an opening, the two ends of the opening are a first clamping end and a second clamping end, the first clamping end comprises a first fixing part and two first arc-shaped clamping faces, and the first fixing part is fixed to one side of the opening of the ring body; the second clamping end comprises a second fixing part and two second arc-shaped clamping surfaces, and the second fixing part is fixed on the other side of the opening of the ring body; a first elastic connecting part is arranged between the first fixing part and the two first arc-shaped clamping surfaces, one side of the first elastic connecting part is connected with the first fixing part, and the other side of the first elastic connecting part is connected with the two first arc-shaped clamping surfaces. The self-adaptive forming piece clamping ring can adaptively adjust the fitting state of each arc-shaped clamping surface and a tooth wall along with the tooth state to improve the fitting degree of the forming piece and the tooth, is firm in clamping, not easy to fall off, good in tooth filling effect, free from fighting for space with a clearance wedge, and convenient to use.

The invention discloses an upper-sealing and lower-mining integrated filling sand prevention pipe column and belongs to the technical field of oil exploitation. An upper packer, an interlayer connecting pipe, a lower packer, a special filling tool, a signal screen pipe, a safety joint, a sand filtering pipe and a blind plug are sequentially connected from top to bottom. The upper packer comprises an upper releasing joint, the upper releasing joint is internally provided with a releasing core pipe, a sealing piston is arranged in a sliding space, a pushing and pressing short section is further arranged in the sliding space, the outer wall of the pushing and pressing short section makes contact with the inner wall of the upper releasing joint, the end of the pushing and pressing short section is inserted into an installation gap in the sealing connecting sleeve, a first locking spring is arranged in the installation gap, the position, close to the end, of the outer wall of the releasing core pipe is connected with a releasing shear ring through a releasing shear pin, a releasing tail pipe is mounted in the releasing core pipe, and the tail end of the releasing tail pipe is connected with a compensator through a transition core pipe in an interlayer connecting pipe. The upper layer is plugged through the combination of the upper packer and the lower packer, so that the pipe column is well sealed and is long in service life.