The percussion mechanism
(57) Abstract:The invention relates to the oil and gas industry and can be used to release the pipe string during drilling and workover. The percussion mechanism includes a rod-drummer, telescopically mounted in the housing. Rod-drummer slots transmits torque to the housing. In the annular bore in the housing set screw collet sleeve. Rod-drummer has multiple outer thread under the thread of the sleeve. The locking element permits operation of the site trip for the end of the rod-drummer and housing without disturbing the circulation of drilling fluid. For this purpose, we first dump valve or hollow load. Increases the reliability of the percussive mechanism. 5 Il. The invention relates to neftegazodobyvaushsei industry and can be used to release the pipe string during drilling and workover.Known shock mechanisms for stuck pipe string, comprising a casing, a drummer and site tripping [1, 2].A disadvantage of the known devices is the low reliability of the site of release and low impact energy.A disadvantage of this device is that at great depths in the borehole from the influence of high temperature broken plasticity seal, reducing the tension of the site of release and impact. In addition, increased contact force of friction between the housing and the piston, a drummer, which has a considerable resistance to movement of the piston, the drummer, which also reduces the impact energy in the device.The problem to which the invention is directed, is to increase the reliability of operation of the percussion mechanism due to the significant reduction of the temperature influence on the work site trip in deep wells and exceptions frictional forces impeding free movement of the piston, a drummer at the wrong shot.To solve the problem of the known device, comprising a housing, in which is telescopically mounted a rod-drummer, the locking element and site tripping, according to the invention is further provided with a threaded collet sleeve mounted in the annular bore of the housing and the piston, the drummer performed outside the multiple resinae a combination of the above signs, that means the consistency of the proposed device the requirements for inventions.In Fig.1 shows a device, a vertical incision in the process of descent into the well; Fig.2 - the same, in the working position when the blow up of Fig.3 - section a-a in Fig.1; Fig.4 - section b-B in Fig.1; Fig.5 is a view In Fig.2.The device comprises a cylindrical housing 1 having an internal annular bore 2, slot 3, the anvil 4 and the radial groove 5. In case 1 telescopically mounted rod-drummer 6, which is provided with a coupling 7, slotted lugs 8, designed for torque transfer multiple threads 9 node coupler 10, and a cylindrical Cup 11 with the striker 12. The transmission of the rotating torque of the housing 1 is provided by a slotted nut 13, which is connected with the top of the housing 1. In the annular bore 2 with the possibility of axial movement and rotation set collet threaded sleeve 14 host attachment 10 with threads corresponding to the threads 9, is made on the stem of the striker 6.To avoid telescopic travel rod-drummer 6 in the housing 1 when the shutter device in the borehole it is provided with a locking element is a ball on glass 11, the movable sleeve 17 with the annular groove 18 and Rethimno spring 19. The movable sleeve 17 is supplied through the bypass holes 20, the valve seat 21 and the cone 22, the angle of taper which is less than the angle of friction of steel on steel. In the upper part of a cylindrical Cup 11 internal conical cavity corresponding to the parameters of the cone 22. The fixation rod-drummer 6 in the housing 1 provided with a recess balls-clamps 16 in the radial groove 5 and fixation of their cylindrical surface of the movable sleeve 17. This sleeve 17 is held in upper position by a combination of conical surfaces of a cylindrical Cup 11 and the housing 22. At the time of occurrence of complications in the borehole, the device operates as the internal pressure with the previous installation of the spherical valve 24, and the reset hollow articles. In both cases, the circulation of drilling fluid is not disturbed, because the ball has the flush channels.The percussion mechanism works as follows.At the time of sticking produce tension on the drill string and the wellbore dropping spherical valve 24, as shown in Fig.2, which is installed in the valve seat 21. Inside the annular groove 18 with the plane of the arrangement of balls retainers 16 under load balls-clips 16 of the radial grooves 5 will move in an annular groove 18, resulting rod-striker 6 is released from engagement with the housing 1. Released rod-drummer 6 together with the node attachment 10 will move up to another node until 10 in the socket 3, the diameter of which equals the outside diameter of the compressed threaded collet sleeve 14. Force release multiple outer thread 9 of the internal thread of the collet sleeve 14 depends on the angle of inclination of the helical line of the thread, which is calculated from the predetermined tension force. Under the influence of this force collet sleeve 14 fastened and released stock their drummer 12 produces a shot on the anvil 4 of the housing 1.Unloading drill rod-striker 6 is moved down. This collet sleeve 14, moving down, will be in the ring bore 2 and open their petals will cover sovmestimost with it an external thread 9. Thus, the node attachment 10 is again ready for further strike action. Handling power trip by additional input of the brake mechanism preventing rotation of the collet sleeve 14 (not shown).The proposed device is installed in the layout of the drill string and allows you to quickly enter it in action in MSM can be widely used in drilling and overhaul of oil and gas wells.Sources of information
1. USSR author's certificate 1615326 class. E 21 In 31/107, publ.19882. USSR author's certificate 1506072 class. E 21 In 31/107, publ.19873. Kemp, "Fishing work in oil wells". - M.: Nedra, 1990, pages 32,33, Fig. 15 (prototype). The percussion mechanism, comprising a housing, a piston, a drummer, telescopically mounted in the housing with the possibility of transmission of torque, the locking element and site tripping, characterized in that it further provided with a threaded collet sleeve mounted in the circular hole made in the casing, the stem-drummer performed multiple outer threaded for engagement with threaded collet sleeve, and the locking element is designed with the possibility of disengagement of the rod-drummer and housing without disturbing the circulation of drilling fluid under the influence of excessive internal pressure with the previous reset valve or hollow articles.
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.