Procedure for oilfield pipeline repair. RU patent 2513627.
 Method and device for cleanout of pipeline inner surface / 2506412Group of inventions relates to oil producing industry, in particular, to methods for cleanout of pipeline inner surface. While implementing the method a template connected to the device is fixed to the pipe; at that the device contains cutter, brush, impeller to provide rotation of the cutter and brush, wire rope with length exceeding length of the pipe. Wire rope with the device is disconnected from the template; then it is and connected to tension reel. The device is drawn along the pipe with simultaneous air supply to the pipe inner surface. |
 Rotary nozzle / 2494822Invention relates to drainage facilities and may be used for cleaning of said facilities. Proposed rotary nozzle comprises bearing parts and third revolving part. Screw pump drives said revolving part and is engaged with inner surface by gearing. Said third part has outer helical elastic groove. Bearing parts have outer lengthwise resilient plates. Central feed pipe features bores at the third part front and rear arranged mirror-like on pipe surface. |
 Thermomechanical complex of pipeline inner composite coat / 2487288Thermomechanical complex consists of articulated self-propelled cleaning module, diagnostics module, turbine expander and self-propelled module of coat application. Expander turbine is driven by pipeline gas flow to run the shafts of electric generators. Electric power produced by said generators is used to drive the complex inside pipeline, clean pipeline inner surface, monitor its state, separate polymer particles from gas flow, compact polymer particles, heat them and convert into viscoelastic bulk and to apply two layers of said bulk together with several layers of reinforcer fibres. Self-propelled modules are driven by barrel-like mills tightly pressed against pipeline inner surface. Motors revolve said mills in different direction along different spirals via misaligned gearboxes, change-gear trains, reduction gearboxes and drive shafts. |
 Mechanised machine for cleaning of drainage pipes / 2485254Machine comprises a rope, mechanically connected to a motor block, comprising a DC motor adapted for operation in the range of operating rotation frequencies and for development of substantially permanent torque when working with varying rotation frequencies in the entire range. The machine also comprises a device of AC motor control made as capable of AC to DC conversion and transmitting DC to the motor, and a device of rotation frequency control, communicating with the motor block and made as capable of variation of the operating rotation frequency of the motor in the range of operating rotation frequencies. According to another version, the machine comprises a frame unit connected to a body for rotation of the body, having an opening in the front part and a rope, a part of which is coiled inside the body, and its actuating end is made as capable of insertion into a drain via the opening in the body. The machine also comprises an electric motor installed on the frame unit, the output shaft of which is mechanically connected to the body for rotation of the body and the rope. At the same time the motor may operate in the range of operating rotation frequencies, containing the first and second rotation frequencies, besides, the value of the torque developed by the motor in process of operation at the first frequency of rotation is equal to the torque during operation at the second rotation frequency. According to the third version of design, the machine comprises a frame unit, having several lengthy tubular elements made of the first and second lower support elements. At the same time the second support element comprises a lengthy tubular element, and both support elements are parallel to each other in the horizontal plane. The frame unit also comprises angular and vertical loop elements stretching between the first and the second support elements, a vertical adjusting plate with a hole and an upper support element with a fixed end, attached to the vertical loop element and a free end aligned in parallel to the horizontal plane. The machine also comprises a rope inserted into a drain, a rotary drum, with at least a part of a rope arranged in it, besides, the rope and the drum rotate simultaneously, a DC motor made as capable of operation at multiple various operating rotation frequencies and adapted for development of a permanent torque in process of operation at each of multiple separate operating frequencies of rotation and a device for rotation frequency control made as described above. |
 Hydrobarodynamic device for cleaning of pipelines inner surface / 2466804Hollow stock ends in nozzle head piece(s) directed to periphery of cavitator-limiter of stroke provided with a spring, bearing against head piece(s), and a pusher entering stock cavity and ending with a valve detaching cuff cavity from nozzle head piece(s). |
 Hydrobarodynamic device for cleaning of inner surface of pressure pipelines / 2466803Hydrobarodynamic device for cleaning of inner surface of pressure pipelines contains a cuff, a hollow stock and a cavitator-limiter of stroke. Hollow stock is provided with sprung cup-shaped cylinder covering openings of cylindrical work chamber being an extension of hollow stock and exceeding its diameter step-like. Sprung cup-shaped cylinder, its bottom and work chamber step form control chamber connected to stock cavity and then to cuff cavity, and work chamber bottom is connected to cavitator-limiter of stroke via adaptor. |
 Device for cleaning of pipelines / 2466802Device for cleaning of pipelines contains a jet-forming cuff, a receiver, a hollow stock and a centraliser. Receiver is formed by jet-forming cuff and toroid-shape cuff located just as the first one on hollow stock, and power rope is attached to the front of the device. Toroid-shape cuff is installed with possibility of moving along the stock. |
 Hydro-baro-dynamic pipeline inner surface cleaner / 2465075Proposed device comprises cup with spring elements, staggered along the circle to make wedge-shaped grooves in outer circle, inner elastic element, rod and turbuliser cavitator made up of screw driven by hydro-baro-dynamic jets forced on screw blades. Screw blade edges in contact with sediments are furnished with abrasion proof coating while screw proper may be equipped with rings rigidly jointed with blades. Dynamic destruction of sediments on tube inner surface combines water jets effects and drilling out of sediments by screw that acts as drill bit. |
 Free-flow pipeline inner surface cleaning device / 2464113Proposed device comprises jet collar fitted in cylinder plugged at rear end. Collar, cylinder and face cover make water intake chamber for water to wash away sediments through collar conical slits. Pipeline is cleaned by jets that create cylindrical layer parallel with pipeline. Jets move toward pipe walls and along the pipe to wash away sediments into well or slime pit. Device is towed by cable to clean the pipe and to gage pipe channel. Besides, proposed device comprises outhaul cable. |
 Installation and device for cleaning furnace tubes of different diameter from coke deposits / 2460595Invention can be used in oil industry. Installation is designed for furnace with tubes of convective and radiation coil consisting of heating part and soaking section and includes loading, starting and discharging device for scraper, separator-catcher for scraper and carrier flow supply system for scraper that is connected to oil product refining installation. All said devices have inner diameter of pipes equal to soaking section tubes diameter. Starting device is equipped with conical adapter-reducer from starting device tube to heating part of furnace radiation coil. The scraper for cleaning furnace tubes includes head and tail part with scrapers connected between themselves by connecting element. There are at least two umbrella-shaped modules in head part that are formed by flexible framework and dome, the diameter of first module matches the diameter of heating part of furnace radiation coil, and the diameter of the second module matches the diameter of soaking section coil. |
 Device for cleaning internal surface of pipe line / 2254938Proposed device includes working member with drive, interconnected working members made in form of barrel-shaped mill secured on load-bearing housing where electric motor is mounted on rotary supports. Said electric motor is connected with load-bearing housing by means of gear train. Carriers of gear trains of two load-bearing housings are interconnected by means of swivel joint. Direction of spiral of barrel-shaped mill is opposite on each load-bearing housing; electric motor housings and truck with running rollers where rope and electric cable are secured are interconnected by means of swivel joints. Proposed device is used for cleaning the pipe line surfaces not only from resins and paraffins but from solid projections of metal; device may be used for cleaning the surfaces at maximum curvature and at availability of lateral connections. |
 Sludge trap / 2256769Sludge trap has body with removable base, head and delivering line. Side channels for sludge-containing process liquid flowing are formed in upper body part. Head is provided with sealing funnel for collecting sludge inside body after stoppage of process liquid delivery. Delivering pipe comprises top member with orifices directed tangentially to top member axis to create swirled process liquid flow. |
 Device for cleaning inner cylindrical hydraulic structure member surfaces of corrosion and fouling scale / 2274708Device to clean inner cylindrical surfaces, particularly tubular pile structures of fixed marine platforms, is made as projectile comprising cylindrical body and core with tip. The projectile is connected to hoisting mechanism with rope. Outer surface of cylindrical body is provided with elastic member having outer diameter exceeding that of cylindrical body to provide cooperation thereof with surface to be cleaned. Elastic member is made as bushes produced of steel or polymeric rope cuts and arranged in cylindrical body slots along several screw lines. The screw lines are angularly offset one relative another. Outline defined by outer bush ends forms closed circle in plan view. Concreted cast-iron bars and ropes are arranged in body cavity defined by inner body wall surface and core. Projectile tip is made as radial flat ribs of rolled metal fixedly connected to the body. Outer rib contour have conical shape. |
 Device for cleaning internal surfaces of pipe lines / 2288789Proposed device has hollow housing with propulsive nozzles and unit for connection with working agent supply hose and hydraulic drive rotor mounted in housing; it is provided with cleaning tools at its end. Hollow housing is divided in center by means of disk provided with convergent nozzles located at angle relative to its axis forming working angle for communication with rotor blades by means of working agent; rotor blades are made at angle relative to axis of rotation. Hollow housing is additionally provided with inclined nozzles in its front part for motion of device along pipe and for motion of nozzle along rotor axis; spring-loaded guides made in form of knife are articulated in its rear part. |
 Apparatus for removing pipeline clogs / 2290265Apparatus includes frame, feeding device with pressure roller, adapter, flexible wire and drums. One drum is used for winding flexible wire and other drum is used for winding rope. Drums are made with possibility of joining by means of locking member. Adapter is secured to flexible wire and to rope simultaneously. |
 Method for cleaning inner surface of tubes / 2290266Method comprises steps of mechanically separating deposits from pipeline surfaces and removing deposits out of cleaning zone. Plant for horizontally directed drilling is used for cleaning pipelines. Said plant has tie rods that are preliminarily introduced into pipeline. Expander and scraping brush are successively joined to tie rods. Then translation and rotation movements are imparted to tie rods and to devices joined with them for moving tie rods and devices joined with them in opposite direction. |
 Inter-tube inspection tool at controllable speed of motion / 2293612Proposed tool has cylindrical body with front and rear supports in form of circular collars mounted between body and pipe line, tool speed sensor, control unit and drive for adjustment of gas bypass. Tool is provided with bypass system including six double-loop gas bypass sections with central passage provided with nozzle and passage of second loop having nozzle in form of deflector and throttle valve secured in one module in tool body. |
 Cleaning piston / 2311587Cleaning piston comprises hollow cylindrical housing provided with towing, load-bearing, and scrapping collars and nozzle mounted on one of the faces of the housing for permitting directed action of gas flow on the inner surface of the pipeline and made of a bank of branch pipes bent in the direction to the inner side of the pipeline. The opposite face of the housing is provided with the nozzle for collecting garbage. The space of the housing receives the changeable bag for garbage connected with the nozzle for collecting garbage and made of a material that allows the gas to flow from the nozzle for collecting garbage to the nozzle for the action on the inner surface of the pipeline. |
 Device for pipelines cavity cleaning / 2330732Invention is related to devices for removal of deposits in pipelines by hydrodynamic method, which is based on usage of high pressure water energy. Device is arranged in the form of water jet head that contains water supplying channel, distributing chamber with central conical splitter and rear nozzles. Water supplying channel is equipped with accelerator of inlet flow, which is arranged in the form of confuser, and distributing chamber is arranged in the form of ball segment that passes with its end part into truncated cone. |
 Manual device for elemination of clogging in channels of closed circuit / 2333048Device contains body of prolonged shape, which is assembled from rigid links that are serially combined into flat kinematic circuit, movable joints of which are arranged as cylindrical hinges, every of which is equipped with limiting device that prevents rotation of links in the hinge within the limits of turn angle, which is common for adjacent links and which makes from 170 to 190 degrees. Spaces, to which turn of links is impossible, are located from one side of body of prolonged shape, and on the opposite side at the end of one of extreme links that is distant from the hinge, support is installed, at that distance from this hinge to the support part that is most distant from it is more than internal transverse size of channel. |
FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil industry and may find application in repair of oilfield pipeline. During repair of oilfield pipeline the pipeline is dug out to the length up to 15 m at the beginning, the pipeline is cut and its end is shifted aside in regard to the pipeline axis to the value of up to 0.4 m; an assembly in a form of a screw downhole motor with a chisel at the tubing string is placed into the pipeline; water is pumped through the tubing string with the flow rate of 0.2 - 0.5 m3/min under pressure of 3-6 MPa; the pipe is driven with force from 1.5 up to 3 t to salt deposits and these salt deposits are drilled out; as the assembly moves inside the pipeline the running string is extended, the pipeline is drilled at direct sections with deviation from the axis up to 15° per 10 m.
EFFECT: method provides destruction of barium sulphate deposits in the oilfield pipeline.
1 tbl
The invention relates to the oil industry and may be used in the repair of oil field pipelines.
The known method of cleaning the internal surface of the pipeline, in which treatment device is moved by pipeline due to the pressure of the conveying medium. In the zone for cleaning device enter the seals of different sizes and buoyancy. The seals placed in sealing solution (RF Patent №2043174, publ. 10.09.1995).
The known method of cleaning of pipes in which destruction of sediments carried out by shock pulses that are in the tangential direction, with the resulting impact extinguish tangential forces, attached to the Executive unit (Patent RF №2147649, publ. 20.04.2000).
The disadvantage of technical solutions is the inability of destruction in the pipeline is strong, tough, hardened salt tubes formed by sediments and crystallization of barium sulfate.
In the proposed invention solves the problem of the destruction of the oil pipeline salt deposits of barium sulfate.
The problem is solved by the method of repair of oil field pipelines, according to which digging through the pipeline at the length of 10-15 m in the beginning of the pipeline, cut off the pipeline, the end the pipeline is shifted in the direction of the axis of the pipeline on the value of 0,2-0,4 m, placed in the pipeline layout in the form of screw downhole motors with a chisel on pump-compressor pipe, pumps by pump-compressor pipe water with flow rate from 0.2 to 0.5 m 3 /min 3-6 MPa serves a pipe with a force on the salt deposits from 1.5 to 3 tons and produce drilling salt deposits, as the layout of the inside of the pipeline are increasing tubing pipes, razvarivaya pipeline on the straights with deviation from the axis on 0-15° 10 m
Summary of the invention
Often wells on the objects of oil-field (oil pipelines) comes products with high content of barium sulfate (barites), which is the accumulation of salts in the pipeline from the well to the Assembly point. Reagent capable of destroying deposits of barium sulfate, does not exist. The structure created by the barites, not destroyed by chemical methods, and it is very difficult destructible mechanical influence. When large salt deposits on the pipe wall is an increase in pressure pumping liquid, and sometimes bleeding becomes impossible. The existing methods of cleaning piping is not able to destroy fossil deposits barytes. In the proposed invention solves the problem of the destruction of the oil pipeline salt deposits of barium sulfate. The problem is solved as follows.
At the beginning of the pipeline near the wells produce the excavation of the pipeline up to 15 m in length. Cut off the pipeline. For free passage of the drill link in the pipeline the pipeline end shift in the direction of the axis of the pipeline on the value of 0.2-0.4 M. This shift becomes possible excavated on the length of 10-15 m A value of 0.2-0.4 m sufficient for the introduction shifted the end of the pipe drilling layout. More 0,4 m offset impractical, since does not create additional conveniences for work. In the pipeline is injected downhole drilling motors with a chisel on pump-compressor pipe. As of pipes use of technological pipes for production of underground repair of wells with inch thread ends and coupling between a conditional diameter 2"~2.5" (inch) depending on the diameter of the pipeline. Drilling-out deposits in the pipe of diameter 4" (114mm) use of pump-compressor pipes of diameter 2" (60 mm), for pipe of diameter 6" (168 mm) - pipes with diameter of 2.5" (73 mm).
For pump-compressor pipe pumped water with flow rate from 0.2 to 0.5 m 3 /min 3-6 MPa, under the action of a rotating screw downhole motor with a chisel. Served inside of the pipeline pump-compressor pipe, increasing tubing pipes and razvarivaya salt deposits. Feed pipes are produced with the help of a crane with a force on the salt deposits from 1.5 to 3 tons The water supply is carried out by means of a pump unit CA-320 and water tankers.
The above modes (consumption of 0.2 to 0.5 m3 /min, pressure 3-6 MPa and effort on the salt deposits from 1.5 to 3 tons) allow you to drill not only the bottom of the pipeline, but the entire amount of salt deposits. In these conditions occurs beating bit and obeshanie a bit all over the internal surface of the pipeline and not just the bottom. Applied pages allow you to drill relatively straight pipeline sections with deviation from the axis up to 15 degrees per 10 meters
Examples of specific performance
Example 1. The pipeline with a diameter of 114 mm with straight areas and deviations from a straight direction up to 15 degrees to 10 m length kolmat deposits barytes. About wells at the beginning of the pipeline digging through the pipeline at the length 15 m Cut off the pipeline, the end of the pipeline is shifted in the direction of the axis of the pipeline 0.4 m In the pipeline is placed layout, including downhole drilling motors SDM-75 75 mm in diameter with a chisel IN-RS 83 mm diameter for pump-compressor pipe diameter 60 mm For pump-compressor pipe pumped water with a flow rate of 0.5 m 3 /min at a pressure 6 MPa. As drilling, salt deposits are served into the pipeline pump-compressor pipe, increasing tubing pipes and continue drilling. Feed pipes are produced with the help of a crane with a force on the salt deposits 3 so the water Supply is carried out by means of a pump unit CA-320 and water tankers.
Produce salt drilling tubes with water circulation and leaching products drilling through the annular space from the entrance drilling and pump-compressor pipes prepared in the barn. The final part of the pipeline block valve to avoid jamming the drilling tool and care of water during drilling.
Example 2. Perform as an example 1. About wells at the beginning of the pipeline digging through the pipeline at the length of 10 m Cut off the pipeline, the end of the pipeline is shifted in the direction of the axis of the pipeline by 0.2 meters Pumped for pump-compressor pipe with water flow of 0,2 m 3 /min at a pressure of 3 MPa, serves a pipe with a force on the salt deposits 1,5 tons
Example 3. Perform as an example 1. About wells at the beginning of the pipeline digging through the pipeline at the length of 12 meters Cut off the pipeline, the end of the pipeline is shifted in the direction of the axis of the pipeline 0.3 m They are displaced by pump-compressor pipe water with a flow rate of 0.3 m 3 /min at a pressure of 4 MPa, serves a pipe with a force on the salt deposits 2 I.
This method has allowed to clear the pipeline as soon as possible, sinking on the straight section 1.5 km ranged from 200 to 500 m per shift. Then after the turn of the oil pipeline operation was retried and cleared another 1.5 km
Upon completion of the drilling equipment is removed from the pipeline, the pipeline end set on a former place, the pipeline is brewed and put into operation.
Indicators used equipment are presented in table 1. As a result, the pipeline cleared of salt deposits, the performance of the pipeline restored.
Application of the proposed method will allow to solve the problem of destruction of the oil pipeline salt deposits of barium sulfate.
Table 1 no PP Name Value 1Diameter of pipeline, mm
114 x 4 2Diameter of screw downhole motors SDM-75, mm
75 3Length of screw downhole motors SDM-75, m
4 4Bit size of AT-RS, mm
83 5Diameter of pump-compressor pipes, mm
60 x 5 6The length of one of pump-compressor pipes, m
10 7Swivel, PCs
1 8Flexible hose of high pressure up to 40 MPa length of 12 m
1 9The Elevator pipe of ECL-60, PCs
1Vehicles:
1Pump unit CA-320
1 2Water carrier
3 3Truck with cranemanipulator
1 1Drifting through the pipe per shift, m
300-500 2The pressure of idling PDM-75, ATM
15 3Working pressure while drilling, MPa
3-6 4Bit load (at penetration), t
1,5-2 5Water consumption during the drilling of 1 m of pipeline, m 3 /min
0,2-0,5 6Drilling speed, m/min
0,5 7The time to build a single tube, min
3-5 8The call time circulation after extension tubes to 10 m of the pipeline, min
3 9The volume of water consumed to call the circulation of 10 m of pipeline, m 3
0,1The method of repair of oil field pipelines, according to which dig the pipeline by the length up to 15 m at the beginning of the pipeline, cut off the pipeline, the end of the pipeline is shifted in the direction of the axis of the pipeline by up to 0.4 m, placed in the pipeline layout in the form of screw downhole motors with a chisel at booster the pipe, pumps by pump-compressor pipe water with flow rate from 0.2 to 0.5 m 3 /min 3-6 MPa, serves a pipe with a force on the salt deposits from 1.5 to 3 tons and produce drilling salt deposits, as the layout inside a pipeline increasing the column pumpcompressor pipes, razvarivaya pipeline on the straights with deviation from the axis up to 15 degrees per 10 meters