Downhole vibrator for emergency operations in wells
(57) Abstract:The invention relates to the field of drilling and operation of wells, namely submersible vibratory mechanisms. To improve reliability by saving efforts torque and to ensure full warranty from the relaxation of any threaded connections in the lower portion telescopically mounted in the body of the rod set piston, the seal placed on the outer surface of the piston, and the outer surface in the form of a polyhedron made along the length of the rod. 2 Il. The invention relates to the field of drilling and operation of wells, namely submersible vibratory mechanisms.Known submersible hydraulic vibrator with dvuhklapannaja distribution system fluid, comprising a housing with anvils and hammer (Kolomoets A. C. Winds A. K. Modern methods of prevention and liquidation of accidents in exploration drilling. M "Nedra", 1977, S. 140-142). The lack of hydrovibrator that with the deployed column pipes hydrovibrator has a hard link. As a result, the efficiency of hydrovibrator negligible because the frequency range of the vibrations of the column of pipes on an order of magnitude smaller range castolite special trubber for unscrewing pipe (overview series "Drilling" "Eliminating sticking of the drill string using percussion mechanisms, Issue 18, M, 1982, S. 47-49). When trubber no efforts torque that adversely affects the performance of threaded connections located below the subs, i.e., they'm quite unhinged by it.The invention consists in that the downhole hydrovibrator for emergency operations in wells containing hollow body in the upper part of which is made a hole in the form of a polyhedron, telescopically located in the housing, the rod having an outer surface in the form of a polyhedron under the housing bore associated with the rod coupling for connection with the column pipe, a seal for sealing the stem relative to the housing and placed in the body cavity of the head with an anvil in the lower part of the rod set piston, the seal placed on the outer surface of the piston, and the outer surface in the form of a polyhedron made along the length of the stem.The claimed combination of features allows you to provide hydrovibrator in a resonant mode and the shift stuck pipe due to the separation of the tubing on the oscillating and stationary parts while maintaining efforts torque IOM is lstvennyh (the oscillation frequency of stuck pipe vibrations of maximum amplitude and the greatest effect when stuck.Depending on the supply of washing fluid, the working frequency of the vibrator is in the range from 30 to 100 Hz, allowing it to be placed as close as possible to the interval sticking, i.e. in the most effective place.Thus, in the proposed hydrovibrator is the separation of the tubing on the oscillating and stationary parts, but completely preserved efforts of torque that provides a full guarantee from the relaxation of any threaded connections.To conduct fishing operations rotation of the hydrovibrator is transferred from the pipe string through a multifaceted rod on the housing with the corresponding cross section in the upper part of hydrovibrator where possible axial movement of the rod. Hydrovibrator works at a certain pressure drop, and therefore, the sealing of the piston is ensured by the sealing body and stem hydrovibrator.In Fig. 1 shows a downhole hydrovibrator for emergency operations in wells, Fig.2 cut the top of the hydrovibrator along a-A.Downhole hydrovibrator includes a housing 1, with the anvil 2 and the striker 3. In the upper part of hydrovibrator posted with the possibility telescopic AC is estco connects the column pipe. The rod 4 with the sealing piston 5 are axial flushing channel 8. To transfer torque from the drill string to hydrovibrator the bore of the housing 1, which may move the rod 4 and the piston rod 4 is made in the form of a polyhedron, for example, square (Fig. 2).Downhole hydrovibrator for emergency operations in the wells is as follows.When the shutter hydrovibrator in the borehole and the successful completion of fishing operations set the string of pipe in such a position that the rod 4 with the sealing piston 5 inserted in the case 1 hydrovibrator the entire length of rod stroke. Then submit the flushing fluid through the axial channel 8 gets into the hydraulic part of the vibrator and provides shock striker 3 2 anvils, creating a vibration.The contact surface of the sealing piston 5 with the sealing rings 6 and the housing 1 provides a seal when the hydrovibrator. Waves generated by hydrovibrator, transmitted through the fishing tool attached to the pipes. The upper part of the housing 1 hydrovibrator will make oscillatory movement relative to the rod 4 and the sealing of the piston 5. T. O. descent vehicle what is used on a column of Tr is, ostiguy such frequency fluctuations hydrovibrator, which corresponds to the estimated natural frequency of stuck pipe. Due to the fact that in the lower part of the rod has a piston seal, and the outer surface in the form of a polyhedron made along the length of the rod, are saved the effort of torque. Therefore, there is no relaxation of any threaded connections located below the subs hydrovibrator that allows to perform an operation on potenciano them by rotating the drill string when the axial load, which can lead to separation on the left thread.When vibration in the area of the resonance stuck pipe under the action of gravity gradually moved down the entire length of stroke of the rod 4. After there has been a shift stuck pipe, start rasagiline column of pipes and eliminate sticking.Design hydrovibrator simple, convenient and reliable in operation. In addition, when the hydrovibrator it creates vibrations are not transmitted to the string of pipe above it, which increases the durability as wellhead equipment, and most of the pipes. Downhole hydrovibrator for emergency operations in wells, the content is defined in the housing stock, having an outer surface in the form of a polyhedron under the housing bore associated with the rod coupling for connection with the column pipe, a seal for sealing the stem relative to the housing and placed in the body cavity of the hammer with the anvil, characterized in that the lower part of the rod set piston, the seal placed on the outer surface of the piston, and the outer surface in the form of a polyhedron made along the length of the rod.
FIELD: oil production industry, particularly for underground well repair to release stuck tool.
SUBSTANCE: device comprises cylinder having bored portion, cylinder, piston connected to traction and compensating rods and sealed with gaskets. Device also has bush with outer flat installed over the piston on compensating rod. The bush and piston end define annular gap with slot-like channel formed in bottom thereof. The device also has valve unit with shutoff member arranged in the annular gap and made as O-ring of elastomeric material. The shutoff member closes liquid flow directed from cavity located above the piston to cavity under the piston. The piston is spaced from the cylinder. Channel, which communicate cylinder cavities divided with piston, is made as annular space between compensating rod and piston and may be connected with slot-like channel.
EFFECT: simplified structure and increased reliability.
FIELD: oil and gas well drilling and overhaul repair, particularly to remove tubing and drilling strings, packers and other equipment stuck in cased wells.
SUBSTANCE: hydraulic jack connected to fishing string of tubing or drilling pipes to be lowered in well comprises hydraulic power cylinders, hydraulic anchor, shaft including facetted rod in nipple having mating profile and connected to the body. Discharge valve is installed over power cylinders so that the valve may cooperate with upper shaft end. Upper shaft end is provided with telescopic pusher. The shaft is hollow along the full shaft length. Facetted rod is connected to sub having seat for check valve ball receiving and flushing pipe. Discharge valve is made as spring-loaded piston with sealing collar. Telescopic pusher consists of guiding bush and sliding collet.
EFFECT: increased efficiency and reliability.
2 cl, 4 dwg
FIELD: drilling equipment, particularly to prevent drilling tool sticking in well.
SUBSTANCE: hydromechanic jar comprises hollow body with inner and outer axial anvils and hollow rod with inner striker installed in the body and adapted to perform axial movement. The inner striker is prevented from rotation with respect to the body. Upper sub with outer striker, piston, thrust with hollow stem and separating piston slidably installed on the hollow stem, as well as movable and fixed connector sealants are arranged on the hollow rod. Lower part of the hollow body is made as annular cylinder with two working borings having different diameters and adapted for periodical body aligning with piston. Lower and upper hollow body parts are filled with liquid lubricant. Unit, which excites circular and radial vibration, is fixedly connected to the hollow body and made as multilobe gerotor mechanism having inner helical engagement means. Unit includes stator fixedly fastened to body, hollow rotor with through axial channel arranged inside the stator and performing off-center rotation inside it, axial support for hollow rotor, free fall ball or plug adapted to close axial rotor channel, as well as connection and lower subs. Radial strikers adapted to cooperate with annular anvils are formed on hollow rotor ends.
EFFECT: increased reliability and service life.
3 cl, 10 dwg
FIELD: oil and gas industry, particularly for freeing stuck downhole equipment.
SUBSTANCE: device comprises at least two hydraulic power cylinders, hydraulic anchor, overflow circulation valve having body connected to anchor body by means of shear pins and hollow stem connected to fishing string. Hydraulic separators having floating gaskets are installed between hydraulic power cylinders, as well as between anchor and hydraulic power cylinder. One hydraulic power cylinder comprises spring-loaded piston and consists of two cylinders provided with threads. Pistons of all hydraulic power cylinders have annular sealing means and annular groove for lubricant receiving. Orifices, which communicate hollow stem interior with hydraulic power cylinder and anchor interiors, are created in front of each hydraulic power cylinder and hydraulic anchor inside hollow stem. Orifices located in front of hydraulic power cylinders have diameters less than that of orifices formed in front of hydraulic anchors. Lower stem part is provided with seat for free-falling sealing ball receiving and connecting tread for fishing tool connection. Lower stem part is connected to valve body.
EFFECT: simplified structure along with technical capability retention.
FIELD: drilling equipment, possible use for freeing drilling column if it is stuck in the well.
SUBSTANCE: hydraulic catcher includes tubular body and hollow spindle, connected together without possible rotation. Upper and lower stopping collars are formed on spindle, between which a ring-shaped piston is mounted. Internal surface of body is made in form of cylindrical surface with a band of extended diameter for interaction with piston. Between body and spindle, seals of moving and immoveable connections are mounted, and also forcing and damping chambers are formed, filled with working liquid. Buffer hollow is formed in the body on the side of damping chamber. Piston ring is mounted in damping chamber with possible sliding, isolating damping chamber from buffer hollow. Between body and spindle, throttling channel is formed and a caging device is contained, and also a metering device, letting through a limited volume of working liquid during movement in throttling channel. Caging device is made in form of overflow bushing, positioned inside the piston, and packing bushing, positioned on the side of damping hollow. Metering device is made in form of at least one throttling groove on the end of piston between ends of piston and packing bushing in contact with each other. Packing bushing forms a circular running channel together with the body. Overflow bushing contains external circular collar in forcing chamber. Piston contains internal circular collar on the side of damping chamber. Overflow bushing in middle part is made with longitudinal slits. Drive of piston from the end of packing bushing, contacting the overflow bushing to external circular collar of overflow bushing exceeds distance from the end of overflow bushing, directed towards the damping chamber, up to close edge of each longitudinal slit.
EFFECT: increased efficiency when freeing pipes, increased reliability and resource.
4 cl, 6 dwg
FIELD: underground (fundamental) maintenance of wells, possible use for extracting equipment stuck at the face.
SUBSTANCE: device contains body and spindly connected to working column and object being freed, connected by screw couple to lifting angle, providing for its non-self-braking mobility and forming a "cylinder-piston" couple with hollow, filled with liquid with forming a part of hollow in bored interval of cylinder. Connection of body and spindle is made with possible induction of angular and axial acceleration onto working column with following application of torsion and axial strike. When torsion strikes are required in reverse direction screw couple is made with reverse thread.
EFFECT: increased efficiency of operation, expanded functional capabilities.
FIELD: drilling equipment, namely engineering of devices for freeing wedged part of drilling column in wells.
SUBSTANCE: device includes tubular body and hollow mandrel which are telescopically interconnected. The body is composed of parts, and contains first packer and grooves on internal surface on the side of first edge. In the middle section the body contains internal anvil-shelves, and on the side of second edge - an internal thread. The mandrel is composed of parts, contains threaded tail and grooves on external surface on the side of first edge of body, strikers between internal anvil-shelves of body, at least one piston with second packer on the side of second edge of body. Strikers and piston form a chamber filled with working liquid. The device contains at least one limiting mechanism for connecting working liquid to chamber for liquid in form of belt of greater diameter of mandrel and circular valve, installed in working liquid chamber with mandrel passing through internal hollow. The internal surface of circular valve is in contact with belt of greater diameter of mandrel. Longitudinal drive of circular valve is limited between two stops, projecting from internal surface of the body. Longitudinal drive equals at least the longitudinal drive of mandrel relatively to spring-loaded mechanism of latch from the start of application of force which makes the mandrel enter the body before setting of latch mechanism to working position. Between first and second packers at least two packers are positioned, which divide the chamber for liquid on three sections. Spring-loaded mechanism of latch is contained inside the working liquid chamber, blocking longitudinal drive of mandrel relatively to the body. The stop which limits longitudinal drive of circular valve towards the second edge of body with internal thread, is formed by shelf from lesser diameter of internal surface of body, to which one of packers, which divide working liquid chamber onto sections, is movably connected. Piston with packer on the side of second edge of body with internal thread is made with possible sliding relatively to mandrel and provided with its own packer in contact with mandrel.
EFFECT: increased reliability and resource, prevented unwanted activation, destruction or wedging of drill bit.
4 cl, 4 dwg
FIELD: drilling equipment, particularly devices to create impact loads for stuck drilling string section freeing from oil or gas well.
SUBSTANCE: device comprises tubular body and mount slidably connected with each other so that the components are restricted from rotation. Tubular body has slots formed in outer surface thereof, inner anvil extensions, the first sealing member arranged from the first end side. Mount has slots in inner surface, belt having increased diameter, percussion means arranged between anvil extensions, the second sealing member arranged in percussion means from the side of the second body end and defining working liquid chamber. Mount also has circular valve having annular side surface, two ends, outer surface and inner surface defined by inner cavity, as well as restriction mechanism, which restricts working liquid communication with one section of working liquid chamber. The restriction mechanism is installed in working liquid chamber and has mount extending through inner cavity and located inside body. The restriction mechanism includes at least one bypass valve arranged in circular valve, which restricts working liquid flow inside one chamber section in one direction. Inner circular valve surface is in tight contact with mount belt having increased diameter. Circular valve travel is limited by two stops projecting from inner body surface and is equal to at least difference between inner and outer surface radii. Stop, which limits longitudinal circular valve travel towards percussion means with the second sealing member installed therein is defined by projection extending from inner body surface having decreased diameter adapted to be slidably connected to the second sealing member of percussion means. At least one percussion means arranged in working liquid chamber has self-sealing member. Diameter of each inner body surface is equal to that of mount, which defines movable connection with the first sealing member arranged in the body.
EFFECT: increased reliability and service life, prevention of uncontrolled device actuation.
3 cl, 5 dwg
FIELD: oil and gas industry.
SUBSTANCE: invention refers to oil and gas producing industry, particularly to wellhead facilities for release of flow string stuck in borehole at failure. The wellhead facility for release of flow string out of borehole consists of a damper and of a vertical pulse generator. The damper is made in form of a vertical sealed cylinder with a piston, an under piston cavity of which is filled with gas, while the generator is made as tubular case consisting of successively connected power cylinders. The power cylinders are furnished with pistons serially joined with hollow rods so, that under piston cavities of the power cylinders communicate between them and via a distributor they communicate with a piston valveless pump. The distributor consists of a cylinder case with two chambers divided with a partition equipped with direct-acting and back spring loaded valves: also force of contraction of the back valve with the spring is higher, than contraction force of spring of the direct-acting valve.
EFFECT: simple design and raised efficiency of release of stuck flow string out of borehole.
FIELD: oil and gas production.
SUBSTANCE: disclosed facility consists of lifter connected to damper and of generator of vertical pulses coupled with pipe string below. The damper corresponds to a cylinder with a piston, internal cavity of which is filled with gas under the piston. The generator of vertical pulses is made in form of a tubular case consisting of successively coupled power cylinders and of the damper connected above with a piston rod. The power cylinders are equipped with pistons successively connected by means of hollow rods so, that under piston cavities of the power cylinders are communicated between them and with the generator of hydraulic pulses via a distributor. The lower rod of the power piston is plugged from below and is connected to the pipe string. The distributor consists of the cylinder case with two chambers and is divided with a partition furnished with a one-stage valve for supply of liquid from a pump and with a back valve for discharge of liquid from the power cylinders. A safety valve is positioned between the distributor and a generator of hydraulic pulses; it is communicated with a buffer reservoir. All valves can operate with variations within wide pressure range.
EFFECT: facilitating selection of optimal mode of operation resulting in higher efficiency of stuck pipe string extracting from borehole, also facility is simple in design, not expensive in fabrication and low metal consuming.