69results about How to "Improve perforation efficiency" patented technology

By removing material of low permeability from within and around a perforation tunnel and creating at least one fracture at the tip of a perforation tunnel, injection parameters and effects such as outflow rate and, in the case of multiple perforation tunnels benefiting from such cleanup, distribution of injected fluids along a wellbore are enhanced. Following detonation of a charge carrier, a second explosive event is triggered within a freshly made tunnel, thereby substantially eliminating a crushed zone and improving the geometry and quality (and length) of the tunnel. In addition, this action creates substantially debris-free tunnels and relieves the residual stress cage, resulting in perforation tunnels that are highly conducive to injection under fracturing conditions for disposal and stimulation purposes, and that promote even coverage of injected fluids across the perforated interval.

An object of the present invention is to provide a readily manufacturing a fishhook having the barb whose angles and shapes can be freely changed correspondingly to purposes of use. A method of manufacturing a fishhook according to the present invention is characterized by: applying machining process for providing a sharpened part at a tip of wire to constitute a fishhook; and applying pressing process for making into a plate-like shape a part in continuation to the sharpened tip part; and further applying simultaneously or sequentially in free order machining process for forming a stepped part at one lateral side of the plate-like part and machining process for cutting out a swollen portion produced at the other lateral side of the plate-like part, whereby forming a point part or a fishhook.

The invention relates to the field of oil drilling and completion, in particular to a downhole particle jet perforation device comprising a particle injection tank, a perforated short circuit, a retractable perforating nozzle, a fixed perforating nozzle, and a pilot drill bit. The high pressure mud and particles are mixed by the particle injection tank to reach the perforation short circuit, ejected from the retractable perforating nozzle and the fixed perforating nozzle at an adjustable angle to quickly penetrate the casing, the cement ring and the formation rock, and the pilot drill bit is mounted on the lower part of the perforation short circuit. The retractable perforating nozzle can achieve large depth perforation, and the perforation depth can be adjusted, the position, type and quantity of the retractable perforating nozzle and the fixed perforating nozzle can be selected according to the actual needs of the site. The downhole particle jet perforation device can effectively improve the efficiency of the downhole perforation operation, increase the perforation depth and the working area, enhance the fluid flow capacity of the stratum, and effectively improve the reservoir productivity.

The invention relates to the technical field of oil and gas field exploitation, and provides a pulse horizontal well volume fracturing device and a horizontal well volume fracturing method. The devicecomprises a coiled tubing, a horizontal section of the coiled tubing is sequentially connected with a connector, a motor head assembly, a centralizer, a pulse tool, an ejector, a positioner and a guide shoe, and the pulse tool, the ejector, the positioner and the guide shoe can generate a high-pressure fluid body. The method comprises the following step of (1) drilling down and determining a perforation position. According to the device and the method, the structure is reasonable and compact, the use is facilitated, through the arrangement, the disassembled and assembled can be quickly achieved, the construction cost can be reduced, a pulse fluid body can be generated by the pulse tool, the pulse fluid body can improve the perforation efficiency during volume fracturing through a nozzle,the generation of micro-cracks in a perforation hole eyelet can be increased, the energy increasing in the perforation hole eyelet is realized, cracks is quickly formed on stratum, the construction pressure is reduced, and the device and the method solve the problem that a traditional volume fracturing reforming technology is relatively limited in a method of reforming a target layer section whenformation fracture pressure is high.

A down-the-hole holding-up hammer comprises an outer casing pipe, a piston, an air distribution rod, an impact joint and a roller bit. An air inlet is formed in the upper end of the outer casing pipe,the lower end of the outer casing pipe is connected with the roller bit through the impact joint, and the impact joint is provided with a joint ventilating hole communicating with an inner hole spraying nozzle of the roller bit; the air distribution rod is fixedly arranged in the outer casing pipe, and the upper end outer wall of the air distribution rod and the inner wall of the outer casing pipe are fixed in a contact mode; the lower end of the air distribution rod extends into the joint ventilating hole in the impact joint, and the lower end outer wall of the air distribution rod is in contact fit with the inner wall of the joint ventilating hole in the impact joint; and the piston is arranged between the outer casing pipe and the air distribution rod, the piston can do up-down reciprocating impact movement in the axial direction of the outer casing pipe, and the bottom end face of the piston serves as an impact acting face acting on the impact joint. According to the down-the-holeholding-up hammer, the higher perforation efficiency and long service life are achieved under the pressure of 6-7.5 bar.

The invention belongs to the field of well completion technology of oil wells, and particularly relates to a multi-control-unit multi-beam laser perforation device in an oil well. The device mainly comprises a laser source, a high-pressure gas source and an underground laser perforator, wherein the laser source generates high-energy laser; the underground laser perforator comprises multiple laserperforation devices which are arranged orderly, controls the high-energy laser to perform the perforation operation in the oil well and controls to eject the gas output by the high-pressure gas source along the emergent direction of the laser so as to provide a clean channel for the laser perforation. The device provided by the invention controls multiple beams of high-energy laser to perform theperforation operation in the oil well at the same time, realizes high perforation efficiency, deep perforation and flexible and controllable perforation direction, improves the formation permeabilityand obviously increases the oil well capacity.

The invention relates to the technical field of oil field oil production engineering and belongs to a combined type double jet flow nozzle used for an oil-water well oil layer ground control underground level drilling device. The nozzle is designed for solving problems that a prior nozzle can only produce common continuous jet flows and rock crushing efficiency is low. The nozzle is composed of a pressing cap 1, a rotation body 2 and a nozzle base 3, wherein the right end of the pressing cap 1 is threaded to the left end of the nozzle base 3; the rotation body 2 is disposed in the nozzle base 3 and is pressed with the aid of the pressing cap 1. The nozzle is mainly applied to field construction of the oil-water well oil layer ground control underground level drilling device and has advantages of being simple in structure and capable of converting common continuous jet flows into rotation jet flows and thus achieving high rock crushing efficiency and the like.

The invention relates to a perforating charge body powder metallurgy billet and a cold extrusion forming process method, and belongs to petroleum exploitation tools. The billet is formed through compatibility of iron powder, copper powder, nickel powder, graphite powder, molybdenum powder and a binder according to different weight ratios, mechanical mixing, pressing and sintering are performed on the raw materials to prepare a charge body billet, cold extrusion is adopted to carry out extrusion on the whole charge body billet to obtain a charge body with the final shape, and sintering and precise pressing shaping are performed to obtain the perforating charge body. According to the present invention, the low alloy content powder metallurgy formula and the cold extrusion technology are adopted to process the charge body, and the following characteristics are provided, wherein the characteristics are that the material formula is novel, scientific and reasonable property is provided, mechanical property of the charge body is good, a penetration depth value of the perforation is large, use is safe and reliable, the production process is simple, the cost is low, perforating operation efficiency is increased, and petroleum exploitation cost is reduced.

The invention relates to the technical field of electric power engineering tools, and discloses high-voltage cable perforating equipment which comprises a bottom plate. A lifting mechanism is fixedly connected to one side of the bottom plate, a winding disc is inserted into the inner side of the lifting mechanism, a pushing mechanism is arranged on one side of the bottom plate, and a base is fixedly connected to the top of the bottom plate. A rotating shaft is movably connected to the top of the base, a clamping block is fixedly connected to the top of the rotating shaft, a clamping hole is formed in one side of the clamping block in a clamped mode, a protruding block is integrally formed on the inner wall of the clamping hole, a perforating sleeve is movably connected to the inner wall of the clamping hole, an inserting groove is formed in one side of the perforating sleeve and connected with the protruding block in a clamped mode, and a first spring is fixedly connected to one end of the perforating sleeve. The equipment can prevent cable blockage from affecting perforation to a great extent, can improve the perforation efficiency so as to improve the cable laying quality, can also prevent rigid perforation of the cable and damage to the cable, can also perform perforation again, and improves the perforation quality.

The invention relates to the technical field of seamless steel tube production equipment, in particular to a perforating machine for producing a seamless steel tube. The perforating machine comprises an upper roller positioned on the upper surface of the seamless steel tube, a lower roller positioned on the lower surface of the seamless steel tube, a front guide disc positioned on the front surface of the seamless steel tube and a rear guide disc positioned on the rear surface of the seamless steel tube, wherein the upper roller and the lower roller are arranged in a mirror image mode, and the front guide disc and the rear guide disc are arranged in the mirror image mode; a perforating mechanism is inserted in a cavity on the right side of the seamless steel tube, the perforating mechanism comprises a top rod for applying pressure to the perforating mechanism by a pressure mechanism, a top head is fixedly mounted at the left end of the top rod, and a chip removal gap is formed between the perforating mechanism and the cavity on the right side of the seamless steel tube. The perforating machine for producing the seamless steel tube is compact in structure and high in perforating efficiency, and the inner bore shape and size of the obtained seamless steel tube meet the technological requirements.

The invention discloses an intelligent perforating method for laser cutting and a laser cutting device. The method includes the steps of receiving interface parameters input by a user, obtaining position information of a cutting head unit, driving the cutting head unit to move to a to-be-perforated position, performing logical operation on the interface parameters according to a first preset logical rule to obtain perforating parameters of primary perforating, making a driving unit to perform driving operation according to the perforating parameters, obtaining perforating parameters of next perforating according to the perforating parameters of last perforating and a second preset logical rule, judging whether the perforating parameters of next perforating meet ending conditions, and if yes, ending the process, otherwise making the driving unit to perform driving operation according to the perforating parameters until the obtained perforating parameters meet the ending conditions. By means of the method, the interface setting time of an operator can be shortened, meanwhile perforating efficiency is improved, and machining stability is improved.

The invention discloses a continuous tube cluster perforation intelligent ignition device and a process. The continuous tube cluster perforation intelligent ignition device comprises a continuous tube, an automatic liquid inlet valve, an electronic detonator, a perforation single-core flexible connecting device and a cluster perforated string which are sequentially connected with one another. The automatic liquid inlet valve comprises a body, and a plurality of automatic liquid inlet check valves are arranged on the body; the perforation single-core flexible connecting device comprises an upper connector assembly, H clamps and a lower connector assembly, the upper connector assembly is connected with the lower connector assembly by the H clamps, and two pins are arranged at the ends of the upper connector assembly and the lower connector assembly and are connected with each other by an electric wire. The continuous tube cluster perforation intelligent ignition device and the process have the advantage that the continuous tube perforation operation efficiency can be improved, and the continuous tube cluster perforation intelligent ignition device and the process are favorable for protecting oil and gas reservoirs; pressure perforation operation is carried out, accordingly, the problem of oil and gas reservoir contamination risks during original drilling fluid perforation well completion can be solved, and delivery capacity of the cluster perforated and the handling capacity in response to complicated well conditions of unconventional oil and gas horizontal wells with shale gas, tight oil and gas and the like further can be improved.

The invention belongs to the technical field of oil well completion device, specifically relating to a petroleum underground laser perforation well completion device. The device mainly comprises a laser light source, a high pressure gas source and an underground laser perforator. The laser source is capable of producing high energy lasers, and the underground laser perforator comprises at least two sets of laser perforation devices which are connected with each other in sequence, wherein each set of laser perforation device is responsible for petroleum underground single-hole perforation work; and after being effectively combined, the two sets of laser perforation can control multi beam high energy lasers simultaneously so as to perform petroleum underground laser perforation work. The device has great perforation depth, is flexible and controllable in perforation direction, enhances stratum permeability, has high perforation efficiency, and improves the oil well productivity obviously.

The invention provides a jet gun used for fracturing operation. The jet gun comprises a body and a jet nozzle, wherein the body is provided with a cavity, the jet nozzle is formed in the body and provided with a jet hole, the jet hole is used for communicating the cavity with the outside, and a jet included angle A is formed between the axis of the jet hole and the radial plane of the body. The jet gun solves the problems of low sand jet perforation efficiency and short service life due to imperfect perforation of a jet gun in the prior art.

The invention discloses a laser for a laser cutting machine. A clad fiber comprises a laser gain medium fiber core arranged in the middle. The laser gain medium fiber core is wrapped by a glass isolating layer, a fluorescent material layer and an outer cladding layer from the inside out in sequence. The input end and the output end of the clad fiber are provided with a first fiber Bragg grating and a second fiber Bragg grating respectively; the end surface, arranged at the side of a pump light source, of the clad fiber is provided with a tail mirror; a first lens and a second lens are arranged between the clad fiber and a transmission fiber in sequence; a low-pass filter mirror and a focusing mirror are sequentially arranged right under a semi-reflection semi-permeable lens from upward down; the focusing mirror receives reflection light from the semi-reflection semi-permeable lens; an imager is arranged at one side of the focusing mirror and is used for receiving light rays from the focusing mirror; and the cross section of the glass isolating layer is in D shape. Cutting speed is improved; high-power cutting can be tried, and cutting speed is fast and power redundancy is small; and laser energy can be utilized fully.

The invention relates to a combined type jet flow perforating device which is used for treating hard rocks and stratums in an exploitation process of natural gas and the like and comprises a body in acylindrical shape, at least one direct flow nozzle disposed on the body, and at least two inclined jet nozzles arranged on the body, wherein the inclined jet flow nozzles with opposite inclined directions are symmetrically arranged on two sides of the direct flow nozzle. A reverse flow of the inclined jet flow nozzle is mixed with a direct flow before being sprayed to the surface of the perforating device, so that the reverse flow is reduced, the damage of the jet reverse flow to the spraying tool is reduced, and the service life of the perforating device is prolonged.