32results about How to "Reduce plugging costs" patented technology

The invention relates to a quick stopper for a long-distance pipeline orifice. The quick stopper comprises a circular stopping blind plate, a plurality of flitches, an anti-theft gland, a sliding block, an anti-theft preloaded bolt, and an O-ring, wherein the flitches are sequentially distributed on the edge of the inner side of the circular stopping blind plate, and one surface of each flitch fits closely to the circular stopping blind plate; the other surface of each flitch is provided with a guide pin, and the anti-theft gland is arranged at the outer side of the circular stopping blind plate and sequentially penetrates through the circular stopping blind plate and the flitches; an axial groove is formed in the outside of a gland cover, and a through hole is formed in the bottom surface of the axial groove; the sliding block is slidably connected onto the guide pin, and a threaded hole corresponding to the through hole is formed in the sliding block; the tail part of the anti-theft preloaded bolt penetrates through the anti-theft gland, and is screwed out of the threaded hole of the sliding block, and then the anti-theft preloaded bolt is sleeved with a spring and then is positioned by a self-locking nut; the O-ring is arranged in a clamping slot formed between the circular stopping blind plate and an edge bevel of the sliding block. The quick stopper provided by the invention solves the problems that the stopping efficiency is low and the stopping cost is high, and the end face of a pipe section orifice is quickly stopped in the pipeline construction process. The quick stopper has an anti-theft function and a respiratory function, and is suitable for short-term use in long-distance pipeline construction.

The invention belongs to the design technology of nuclear power plants, and in particular relates to a biological sealing method for holes in walls of nuclear island workshops of nuclear power plants. The present invention first proposes a judgment method for quickly judging whether the hole in the wall of the nuclear island building of a nuclear power plant needs to be biologically sealed. The plugging process specification is a set of very operable standard procedures. Through this method, misjudgment of hole plugging due to different experience and judgment basis of staff can be avoided to the greatest extent, and the work’s impact on personnel qualifications and working hours can be reduced. The limitation of bio-sealing reduces the cost of bio-sealing and improves work efficiency at the same time.

The invention provides a plugging method with temperature and pressure for an exotic sealing face and a plugging device thereof. In the invention, a sealing basal body is provided with an exotic face and supported by a frame-shaped sealing structure member, the upper end of the sealing structure member is tightly pressed against the sealing body and the lower end thereof is closely contacted withthe sealing basal body by a lower self-sealing soft metal plate, one end of the upper self-sealing soft metal plate is weld on the frame-shaped sealing structure member, the non welding end is closely contacted with the sealing basal body, a sealing glue room is formed between the sealing body and the sealing basal body, a sealing room is formed between the frame-shaped sealing structure member and the sealing basal body, an glue injecting hole is arranged on the sealing body, and the plugging is carried out by injecting sealing glue into the sealing glue room from the glue injecting hole. The plugging method and plugging device of the invention adopt a two-stage self-sealing structure, have high sealing reliability, are applicable to plugging with temperature and pressure for high temperature and pressure system and equipment, and have low requirement for sealing structure member material, low sealing glue consumption and low plugging cost.

The invention provides a composite strengthened plugging slurry and a plugging method, comprising the following raw materials in parts by weight: 100 parts of base slurry, 5 to 15 parts of expandable plugging enhancer HJK‑5 (II), and inorganic plugging agent FDL 2-10 parts, 2-10 parts of composite plugging agent, 0.5-8 parts of thickener, 5-20 parts of cementing agent A, and 5-25 parts of cementing agent B. The present invention adopts bridge plugging materials with different properties and particle sizes and carries out gradation research, so that the cracked leakage with different leakage volume can be used in a targeted manner, while saving the plugging cost, it has higher plugging efficiency and Plugging strength.

The invention provides solidified water temporary plugging well-killing working fluid. The solidified water temporary plugging well-killing working fluid is prepared from 10 to 40 percent of solidified water system and 60 to 90 percent of anti-swelling stabilizing fluid, wherein the solidified water system is prepared from the following components in percentage by mass: 1.1 to 1.5 percent of main agent, 0.3 to 0.5 percent of solidification initiator and the balance of water. The preparation method of the working fluid comprises the following steps: 1), taking the main agent in an amount determined in a formula; 2) taking the solidification initiator and the anti-swelling agent in amounts determined in the formula; 3) injecting clear water into a container in an amount determined in the formula, adding the main agent and the solidification agent initiator in amounts determined in the formula in sequence, and uniformly stirring to obtain the solidified water system; 4) adding the anti-swelling stabilizing fluid in an amount determined in the formula to obtain the solidified water temporary plugging well-killing working fluid. A draining method combining acidifying-demulsifying and liquid nitrogen drainage is adopted. The working fluid is simple in preparation process, a colloid protective agent is not needed, the plugging efficiency is increased greatly, the plugging cost is lowered, damage to strata is reduced, and the problems of coexistence of collapse and leakage and low reservoir protection performance in a gas well construction process are solved. The solidified water temporary plugging well-killing working fluid has important practical significance to increase of the oil gas exploration and development speeds.

The invention relates to an anchor detachable packer. The anchor detachable packer comprises a well sealing device (1), a hydraulic device (2) and a pressure guide core device (3), wherein the lower end of a central pipe (25) under the hydraulic device (2) is provided with outer threads; the pressure guide core device (3) is composed of an upper head (34) and a core pipe (35); a slide sleeve (16) is arranged above a guide head (15) of the well sealing device (1); a shearing pin (17) mounted on the wall of a central pipe (11) is arranged under the slide sleeve (16); a through hole I is formed in the side walls of the guide head (15) and the central pipe (11) above the shearing pin (17); a through hole II is formed in the side wall of the slide sleeve (16) above the through holes I. After the anchor detachable packer is used for blocking, the integral packer is not needed to be retained under a well, blocking cost is low and materials are saved; a cement bridge plug can be arranged under the packer so that the difficulty of deblocking again can be reduced, and a deblocking operation is simple. The upper half section of the well sealing packer can be lifted out of the ground after blocking and the waste of materials are avoided.

The invention discloses a plugging structure, particularly discloses a plugging structure for a diversion tunnel and belongs to the technical field of hydraulic structure designing construction. The plugging structure is small in plugging construction work load and good in plugging effect. The plugging structure comprises the diversion tunnel arranged in a concealed body and a plugging body arranged in the diversion tunnel. A similar-oval plugging section with a longitudinal section smaller at two ends and larger in the middle is arranged on the diversion tunnel. The plugging body is a similar-oval plugging body matched with the shape of the similar-oval plugging section, and the similar-oval plugging body is arranged at the maximum cross section position of the similar-oval plugging section.

The invention relates to a method for calking a deep underground nonwatertight channel, which adopts the technical proposal that the method comprises: measuring the flow velocity and the flow rate of leaked points of a main nonwatertight channel first; drilling three calking holes on the upstream, the midstream and the downstream of the nonwatertight channel, and selecting the particle diameter of calking materials to not more than one third of the aperture; using high-pressure blast to blow calking stone materials into an upstream hole; using the high-pressure blast to perform mold-bagged concrete calking on a midstream hole; using the high-pressure blast to throw the stone materials into a downstream hole for calking; and performing plaster slurry grouting on the upstream hole and the midstream hole after water seepage of the leaked points is obviously reduced until seeped water is completely calked. The method for calking the underground nonwatertight channel adopts a method for arranging the upstream hole, the midstream hole and the downstream hole and uses the stone materials, mold-bagged concrete and plaster slurry grouting to be combined with each other for calking the underground nonwatertight channel, has strong pertinence of drilling and calking, greatly improves the calking efficiency, and simultaneously reduces the calking workload and the calking cost.