75results about How to "Improve the success rate of construction" patented technology

The invention offers high density fracturing fluid formula used inorganic salt to improve water-base fracturing fluid density. Its feature is that its weight ratio is as follows: weight additive 4-50%, vegetable gum thickener 0.3-1.0%, cross linking agent 0.1-2.0%, pH value regulator 0.5-1.0%, cracking agent 0.002-0.3%, cleanup additive 0.05-0.5%, fungicide 0.03-0.2%, and water 30-73%. The density of the high density fracturing fluid is adjustable and can exceed 1.51g/cm3. It has good high temperature resistant, shearing resistant, and so on. Thus it can supply reliable assurance for abnormal high pressure and ultra-deep well exploration test oil and exploitation.

The invention belongs to the technical field of fracturing construction mechanization, and particularly provides a full-automatic liquid adding device for fracturing construction and an adding calibration method. The full-automatic liquid adding device comprises a prying frame, an engine, a transfer case, a hydraulic device, a liquid adding pump, a metering calibration tank, a liquid additive tank, a liquid supply pump and a control unit, wherein the input ends of the engine, the transfer case and the hydraulic device are sequentially connected; the output end of the hydraulic device is connected with the liquid supply pump and the liquid adding pump; the liquid supply pump is connected with an inlet of the liquid additive tank; an outlet of the liquid additive tank is sequentially connected with inlets of the metering calibration tank, the liquid adding pump and the liquid additive tank; the control unit is electrically connected with the engine, the transfer case, the hydraulic device, the liquid adding pump, the metering calibration tank, the liquid supply pump and the liquid additive tank; and the current situation that in the fracturing construction process, the liquid additive adding precision is large in adding difficulty and discontinuous is avoided, the mechanization and automation degree of fracturing construction is improved, meanwhile, the construction quality and potential safety hazards are effectively eliminated, and the construction success rate is increased.

The invention provides a thick oil steam flooding releasing two-way anchoring tubing anchor. The thick oil steam flooding releasing two-way anchoring tubing anchor comprises a slip, a central tube, a lower cone, a hydraulic cylinder barrel and a fixing piston. The upper end of the central tube is sleeved with the slip, the central tube is sleeved with the lower cone in a sliding mode, the upper portion of the lower cone abuts against the slip, and the slip can move upwards or downwards in the axial direction of the central tube along with the lower cone so as to achieve anchoring or releasing operation. The middle of the central tube is fixedly sleeved with the fixing piston, the fixing piston is sleeved with the hydraulic cylinder barrel in a sliding mode, the upper end of the hydraulic cylinder barrel is fixedly connected with the lower end of the lower cone in a sealed mode, a hydraulic cavity is defined by the central tube, the lower cone, the hydraulic cylinder barrel and the fixing piston, and a through hole is formed in the position, corresponding to the hydraulic cavity, of the central tube. An elastic piece is connected to the lower end of the fixing piston, a connector with which the central tube is sleeved in a sliding mode is arranged below the elastic piece, the upper end of the connector is fixedly connected with the lower end of the hydraulic cylinder barrel, and the elastic piece can be compressed by the connector. By the adoption of the thick oil steam flooding releasing two-way anchoring tubing anchor, setting operation is firm, and the reliable releasing performance is achieved.

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.

The invention discloses a hollow layering steam injecting system. An heat preservation oil pipe is connected below a well head device; the lower end of the heat preservation oil pipe is connected with a telescopic pipe; the lower end of the telescopic pipe is connected with a steam distributing pipe column part; the steam distributing pipe column part comprises an anchor, an oil pipe, packers, an oil pipe releaser and a hollow steam injecting valve; the anchor is positioned at the uppermost end of the steam distributing pipe column part; the lower end of the telescopic pipe is connected with the anchor; in the steam distributing pipe column part, a top packer is arranged above a top oil layer, and is connected to the lower end of the anchor; a middle packer is arranged in a gap of adjacent two oil layers; the oil pipe, the hollow steam injecting valve and the oil pipe releaser are connected between adjacent two packers; and the lower end of the middle packer above a lowermost oil layer is connected with the oil pipe, the hollow steam injecting valve, the oil pipe and a plug. The hollow layering steam injecting system can preferably release thermal stress of a pipe column, is more accurate and effective in steam injecting effect, prevents the steam injecting valve from scaling to block a steam injecting channel, and increases the inner diameter of the pipe column for convenient dropping and fishing.

The invention relates to a sieve pipe self-locking switch controller. The sieve pipe self-locking switch controller is mainly composed of a conical sliding rail connector, a movable stirring block, a spring pressing cap, a reset spring and a front guiding head. Two to six dovetail grooves evenly distributed in the circumferential direction of the axis are machined in a conical structure body of the conical sliding rail connector. The movable stirring block is of a round flaw structure, and T-shaped sliding rails are machined on the bottom face, arranged in the dovetail grooves of the conical sliding rail connector and are in sliding fit. A rod head is machined at the front end of the movable stirring block, the top end of the rod head makes contact with one end of the spring pressing cap, and the spring pressing cap is arranged on a shaft outer sleeve of the front guiding head and is in sliding fit. The reset spring is arranged between the spring pressing cap and the front guiding head shoulder part. The end of the front guiding head is a conical body. The sieve pipe self-locking switch controller is used in cooperation with a sand control sieve pipe with a self-locking switch, one or more sand control sieve pipes at the assigned position under a well can be controlled according to the actual needs and can be made to put into production or quit production, and accordingly the purposes of flow adjusting, water controlling and production system optimizing are achieved.

The invention provides a long-effect packer for oilfield water exclusion production. The long-effect packer for oilfield water exclusion production comprises an upper joint, an inserting pipe, a catching sleeve, a packer rubber, a distance ring, a central pipe, a retaining-pressing sleeve, an upper cone, a locking pin, a slip, a spring, a slip sleeve, a cone, a middle joint, a start shear pin, a setting steel ball, a setting ball seat, a releasing shear pin, a packing cup, a connector, a slide sleeve outer cylinder, a locking steel ball, a slide sleeve, a central sleeve, a reset spring, a lower joint and a plug. The packer, the inserting pipe and a backward flow preventing device are integrally designed, and setting, releasing and production are completed when a string is down once, so that construction technologies are simplified greatly. The long-effect packer for oilfield water exclusion production has the advantages that the packer is specially designed for water exclusion production of oilfield casing collapse wells, normal oil production is unaffected during packing, the matched backward flow preventing device is designed integrally to achieve a backward flow preventing function during pump inspection, and a special tool is used for catching when wellbore operation is needed.

The invention relates to a drilling-plug free tubular column with sand control and well cementation for an open-hole horizontal well, which comprises an external tubular column and an inner tubular column. The external tubular column comprises a sand control screen (2), an open-hole packer (3), an external positioning step (4), an external cementing machine (5) and a sleeve tube (6) are sequentially installed and connected on the an acid-washing filling valve (1). The inner tubular column comprises an oil tube (8) and an inner cementing machine (7) which is installed and connected on the oil tube (8). The inner tubular column is arranged in the external tubular column and the inner tubular column and the external tubular column are mutually fixed sealed. The invention can simplify operating procedures and reduce the frequency of running string, and does not need to perform drilling-plug operation free after cementing for well cementation, and also has the advantages of low operating cost, large drift diameter, regular inner wall, clean well-hole of sand control and well completion, high construction success ratio, large construction stability, low labor intensity, high oil well yield and the like, and can be widely applied to the process of sand control, well cementation and well completion of the open-hole horizontal well for oil exploration.

The invention discloses a releasing apparatus. The lower part of a releasing upper joint is mounted inside the upper part of a releasing lower joint. A releasing shear pin is mounted on the releasing upper and lower joints. A locking slot of the releasing upper joint corresponds to a locking window of the releasing lower joint, and a locking block is disposed inside the locking window. Upper sealing rings are mounted between the releasing upper joint and the releasing lower joint. The releasing lower joint is sleeved with a releasing pipe and springs, and the releasing pipe encases the locking block. The middle part of the releasing lower joint is provided with a connecting hole. Middle sealing rings and lower sealing rings are mounted between the releasing lower joint and an outer sleeve. The middle sealing rings are arranged above the connecting hole, and the lower sealing rings are arranged below the connecting hole. A annular space is formed between the releasing lower joint and the outer sleeve due to diameter difference, and is located between the middle sealing rings and the lower sealing rings. The lower part of the releasing lower joint is connected to the upper part of a lower joint. The releasing pipe is internally provided with a releasing groove. The outer sleeve sleeves the releasing pipe. The upper part of the outer sleeve is connected to the upper part of the releasing lower joint. An unlocking shear pin is arranged on the releasing pipe and the outer sleeve. According to the invention, releasing operation can be reliably carried out, and the construction success rate can be improved.

The invention relates to a controllable dissolution opening device for a first section fracturing channel and a fracturing sectional operation construction process. The controllable dissolution opening device includes a body, a soluble plug and a well cementing rubber plug; a casing pipe female thread screw thread is arranged at the upper end of the body, a casing pipe male thread screw thread isarranged at the lower end of the body, and a centralizing edge is arranged on the outer surface of the body. The body is connected in to a casing pipe string through the casing pipe female thread screw thread and the casing pipe male thread screw thread, the centralizing edge is internally provided with a fracturing hole, and the soluble plug is installed in the fracturing hole; the well cementingrubber plug is arranged in a cavity below the body, and is in contact with a well cementing float collar, and the well cementing rubber plug is internally provided with a solvent cavity and a rupturedisk; and the solvent cavity is filled with a solution capable of dissolving the soluble plug. According to the controllable dissolution opening device, the first section fracturing channel can be opened, the construction process is simple, the construction cost is low, the running depth is not limited, and the construction of casing pipe running, well cementing and casing pipe sealing pressure tests and the like cannot be affected at all.

The invention belongs to the field of whole directional drilling machines for coal mine and particularly relates to a narrow-body and all-condition directional drilling machine for coal mine. A motorassembly, a walking anchoring operating platform assembly, a slurry pump assembly, a computer assembly, a drilling machine operating platform assembly and a multi-way valve assembly are arranged on acrawler assembly; two groups of anchoring assemblies are symmetrically arranged at the back part of the crawler assembly; and a machine frame adjusting assembly is arranged at the front part of the drilling machine and is used for adjusting the position and the dip angle of the machine frame. The whole size is more compact, and the structure of the existing main vehicle and a slurry pump vehicle double caterpillar vehicle is optimized into a single caterpillar vehicle, so the narrow-body and all-condition directional drilling machine for coal mine has applicability in the coal transportation and use process with small lane size; and the machine frame structure of the drilling machine can meet the requirements of the drilling processes with different drilling height, multiple azimuth and all condition under the condition that the hole opening height is low enough, so that the comprehensiveness and the practicability of the drilling machine on the requirements of the drilling process areguaranteed, the construction success rate of the directional branch hole is increased and the coverage range of directional drilling is guaranteed.

The invention provides an efficient and reliable full-bore straddled downward returning perforation-test combination pipe column and an operation method thereof based on a condition that a perforatedwell section exists above an oil reservoir to be tested. In the pipe column, on the precondition of retaining a pressure relief chamber, a drop bar ignition mode and a parallel explosion propagation type pressure time delay ignition mode are simultaneously arranged above a perforating gun. When drop bar ignition is unsuccessful, pressurization ignition in the pipe column can be directly adopted, complicated operations such as drop bar salvaging after failure of drop bar ignition and the like can be eliminated, damage of in-the-pit instruments can be prevented, and perforation and test successrates can be improved; via the pipe column disclosed in the technical solution, a perforated reservoir can be straddled; integrated operation of perforating, testing, draining, and reservoir reformingof the reservoir to be tested below the perforated reservoir can be performed; construction processes can be simplified, labor intensity can be lowered, an oil test construction cycle can be shortened, and construction efficiency and success rates can be improved.

The invention provides a perforation ignition system comprising a drop bar ignition head and a parallel explosion propagation type pressure time delay ignition head. The perforation ignition system can be applied to a test combination pipe column of an in-the-pit perforation. On the precondition of retaining a pressure relief chamber, two ignition modes comprising a drop bar ignition mode and a pressure time delay ignition mode are set at the same time above a perforating gun. When drop bar ignition is unsuccessful, pressurization ignition in the pipe column can be directly adopted, complicated operations such as drop bar salvaging after failure of drop bar ignition can be eliminated, and pipe column vibration and damage of in-the-pit instruments can be alleviated; effects of lowering labor intensity, shortening oil test construction cycles and improving construction efficiency and success rates can be achieved; the invention also provides a perforation-test-acidification combination pipe column adopting the above ignition system and a usage method thereof; combination of perforation, a test, acidification and a post-acidification test can be realized; via comparison between the test before the acidification and the test after the acidification, acidification effects can be known accurately and directly, and accurate evaluation of a reservoir stratum can be facilitated.

The invention discloses a hydraulic packer communicator, and belongs to the technical field of oilfield exploitation. The hydraulic packer communicator comprises an upper joint, a protective sleeve, amiddle joint, a lower outer barrel, an outer pipe and a lower joint, wherein the upper joint, the protective sleeve, the middle joint, the lower outer barrel, the outer pipe and the lower joint are connected from up to down in a threaded mode in sequence, and are of a hollow structure; a reversing central pipe is arranged in the protective sleeve, and a first platform is arranged at the top of the reversing central pipe, and is in contact with the upper joint; a reversing spring is arranged on the exterior of the reversing central pipe, the top of the reversing spring is in contact with the first platform, and the bottom of the reversing spring is in contact with the top of the middle joint. According to the hydraulic packer communicator, under-pressure operation equipment is only required to be pushed down to the bottom of the packer connected with the hydraulic packer communicator to operate at one time, the production channel of the hydraulic packer communicator can be opened and closed many times, when pump inspection is carried out, the channel is closed by pressing operation of a casing pipe, dump inspection can be carried out, the operating process is simplified, the success rate of construction is improve, operating risk is reduced, and the construction period is shortened.