Hydraulic drilling jar

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

 

The invention relates to the drilling technique, namely, devices for creating shock loads, aimed up or down to release the stuck portion of the drill string in an oil or gas well.

Known hydraulic Yas to strike from the bottom up and top down stuck in the hole of the object consisting of the outer casing and the hollow inner spindle connected without mutual rotation between them, while on the inner spindle is formed by upper and lower thrust collars, between which at least one piston, the inner part of the outer casing is made in the form of an annular cylinder bores of different diameters for cooperation with the piston, between the outer housing and the inner spindle installed seal movable and immovable joints and formed pressure and damping chamber filled with a working fluid in the outer casing side damper chamber is formed by the buffer cavity and the damper chamber is installed with a slidable piston ring, isolating damper chamber from the buffer cavity, with the outer body or the inner spindle forms in the pressure or the damper chamber throttle channel and includes a limiting device, for example, from rings mounted between the upper and lower UE is Mimi collars spindle, reciprocating movement on the length of this channel, and also includes a metering device, which transmits a limited amount of working fluid with the movement of the rings in the throttle channel [1].

In the known construction the outer body creates in the annular cavity of the throttle section, within which the inner spindle has a longitudinal groove, limited upper and lower thrust collars, thus the intermediate connecting links in the ring, outside this area, again in him before the other ring is included in this section. The metering sleeves have an internal camera, balanced with the environment through holes 32, 39 in the housing, and moving the locking up or down Yas provides respectively aimed blows on stuck in the well drill string.

A disadvantage of the known design is the complexity of the control load directed downward (compression columns), for exemption from sticking of the drill string and drill bit in the borehole, which is explained by the loss of stability (change of sign) and the curved friction of the drill pipe in an inclined aimed well, as well as unexpected activation and strikes hydraulic jar during drilling, descents and ascents of the drill string due to no who I am locking mechanism longitudinal travel of the inner spindle relative to the housing, because they will not also decreases the wear of internal parts.

A disadvantage of the known construction is also incomplete use of opportunities to improve its reliability and resource, for example, due to the fact that the holes 32, 39 in the body create places prone to fatigue damage due to cyclic stresses during bending rotation. When this deadlock buffer cavity communicating through-hole 32, 39 with the cavity well, when executed descents and ascents in the process of drilling wells suck and accumulate small particles drilling cuttings (cuttings). For some time in the buffer cavities cemented sludge and leads well-known hydraulic Yas to failure in the well.

The stroke of the drive mechanism is defined near one end of the retracted position of the spindle, at an intermediate distance from the edge position of rest of the piston, the opposite edge - extended position of the spindle (slotted end), which does not allow more efficient to set the ratio between the volume of the pressure and damper chambers with regard to the progress of the spindle with the piston, compressing the working fluid in the pressure chamber until the discharge pressure and volume to be compressed in the pressure chamber of the working fluid to create a curved string of drill pipes is dinamicheskogo hit with enough shock pulse and ultra high impact power.

A disadvantage of the known construction is also incomplete use of opportunities to improve reliability and increase the precision of the time delay generated by the hydraulic system, when used in the curved part of the drill pipe in an inclined aimed well, disturbance and deterioration due to fatigue of the material, characteristics of governors of the spring devices of the pistons and valves containing intermediate connecting links with long-term exposure pulses strike the working fluid and high pressure losses, leading to failure in the well.

A disadvantage of the known construction is also incomplete use of opportunities to improve reliability by reducing pressure losses and reduce heating of the working fluid when flowing through the bypass holes in pistons from one volume of the working fluid in the other, which takes time to cool the working fluid to prevent damage and reduce wear of the sliding surfaces.

This is due to the fact that the diameter of the mandrel, forming a telescopic joint with o-ring seals located in the tubular housing and restrict the first edge of the sealed chamber, for example, from the upper end of the tubular casing or wellhead, and the diameter of the inner qi is Indra tubular housing, forming a telescopic connection with the annular seal located in the annular flange of the mandrel and limiting the other end of the sealed chamber, for example, in the lower part of the tubular body or from a face made different, and when the telescopic movement of the spindle in case there is a change in volume of the working fluid and heat it in the compartments of the sealed chamber.

In the curved part of the drill pipe of Yas in each cycle is, for example, 90 seconds at 20 beats per hour, continuous operation may be, for example, 24 hours, while the working fluid (gear oil) is heated, which requires cooling after application of a cycle of beats and the time required for cooling may be in the process, for example, 15 minutes after a cycle shock that raises the cost of idle wells.

Known hydraulic Yas, consisting of telescopically installed relative to each other casing sealed at its upper end, the inner tabs-anvils and slots on the inner surface, and a mandrel, forming with the tubular housing is a ring cavity filled with the working fluid, and having splines on the outer surface under the slots in the housing, an annular flange with a cylindrical outer what poverhnosti and outer drums ledge, placed between the inner tabs-anvils housing, lower dosing mechanism, mounted in the annular cavity between the mandrel and the housing to restrict fluid flow through the metering mechanism in the event of axial movement of the mandrel and mounted under the bottom of the metering mechanism in the annular cavity between the mandrel and the housing floating piston seal [2].

Known hydraulic jar is equipped with top of the dosing mechanism, which is placed in the annular cavity between the mandrel and the casing above the bottom of the dosing mechanism, and additional pistons with seals, the mandrel is made with an additional annular ledge seal placed between the metering mechanisms and dividing the annular cavity between the lower and upper high pressure chamber, and a circular stage with a radial channel placed over the top of the dosing mechanism, the additional annular pistons are placed on both sides of the ring steps and is spring-loaded relative to it. The upper end of the compensating chamber 38 is defined by a floating piston 37, the lower end of the compensating chamber 53 other floating piston 56, which is shifted upwards by means of a spring 57 and the ring 58, which in turn rely on the mandrel 54 with the sleeve 59 and the locking ring 60. GNC is Rennie 61 62 and outer sealing rings prevent leakage of fluid. The lower surface of the piston 56 is communicated with the hole 30 of the mandrel through the open area 63. Pistons 56, 31 and 37 provide equalization of pressure and volume changes due to thermal effects, thus preventing the destruction of the seals high pressure mud and contamination of the liquid in the chambers.

A disadvantage of the known design is the complexity of the control load directed downward (compression columns), for exemption from sticking of the drill string and drill bit in the borehole, which is explained by the loss of stability (change of sign) and the curved friction of the drill pipe in an inclined aimed well, as well as unexpected activation and strikes hydraulic jar during drilling, descents and ascents of the drill string due to the lack of locking mechanism longitudinal travel of the mandrel relative to the body, because they will not also decreases the wear of internal parts.

A disadvantage of the known construction is also incomplete use of opportunities to improve reliability and increase the precision of the time delay generated by the hydraulic system, when used in the curved part of the drill pipe in an inclined well aimed, for example, by reducing pressure losses and reduce heating of the working fluid when flowing through the confused the SKN holes in the metering sleeve 67, and in the upper and lower metering sites 49, 50, which takes time to cool the working fluid to prevent damage and reduce wear of the sliding surfaces.

This is because the diameter of the mandrel, forming a telescopic joint with o-ring seals located in the tubular housing and restrict the first edge of the sealed chamber, for example, from the upper end of the tubular body (or wellhead), and the diameter of the inner cylinder tubular body, forming a telescopic connection with the annular seal located in the annular flange of the mandrel and limiting the other end of the sealed chamber, for example, in the lower part of the tubular body (or face), executed, and when the telescopic movement of the spindle in case there is a change in volume of the working fluid and heat it in the compartments the sealed chamber.

In the curved part of the drill pipe of Yas in each cycle is, for example, 90 seconds at 20 beats per hour, continuous operation may be, for example, 24 hours, while the working fluid (gear oil) is heated, which requires cooling after application of a cycle of beats and the time required for cooling may be in the process, e.g. the measures 15 minutes after a cycle shock that raises the cost of idle wells.

Another disadvantage of the known construction is the reduction in the efficiency of bilateral seals high pressure, which are more prone to fracture and wear and contamination of the drilling mud in the borehole, for example, in floating pistons 31, 37, with internal 32 and 33 external seals, and create places that are subject to distortions and tacks, due to cyclic stresses tubular casing during rotation of the curved the drill pipe string.

Closest to the claimed invention is a hydraulic drilling jar comprising a tubular housing and mandrel, movably connected without rotation between the housing contains the splines on the inner surface, the inner protrusions of the anvil, the first seal with the first end and the mandrel contains the splines on the outer surface under the slots in the housing, the belt of enlarged diameter, drummers, placed between the inner tabs-anvils of the housing and the second seal placed in the drummer from the second end of the body forming a chamber for working fluid, and containing an annular valve having a circular lateral side, two end, an external surface and an internal surface, the boundary is nnow internal cavity, mounted in the chamber of the working fluid from the mandrel passing through the internal cavity and located inside the housing, with the inner surface of the annular valve tightly in contact with the belt increased diameter of the mandrel, the longitudinal speed of the ring valve is limited between two lugs projecting from the inner surface of the housing and containing a limiting mechanism for reporting the working fluid in one of the sections of the camera working fluid comprising at least one bypass valve, placed in the annular valve that restricts the period of the working fluid within one of the sections of the camera in the same direction [3].

A disadvantage of the known design is the complexity of the control load directed downward to release the remaining downhole tool or exemption from sticking part of the drill string in an oil or gas well that is explained by the loss of stability (change of sign) and the curved friction of the drill pipe in an inclined aimed well, as well as unexpected activation and strikes hydraulic jar during drilling, descents and ascents of the drill string due to the low accuracy of the time delay created by the hydraulics, as well as lack of locking mechanism longitudinal travel of the mandrel relative to building the sa, in consequence of which not less wear and tear on internal parts.

A disadvantage of the known construction is also incomplete use of the possibility of creating ultra high impact power for any shock loads upward (when the tension columns), for exemption from sticking of the drill string and (or) the drilling tool in the well, which is explained by the loss of high pressure working fluid in the aperture annular gap between the limiting collar 16C of the housing 12 and the mandrel 14, as well as small longitudinal speed of the ring valve 10 is essentially less than the amount of protrusion of the belt 36 of the enlarged diameter of the mandrel 14.

Another disadvantage of the known construction is incomplete use of opportunities to improve reliability and increase the precision of the time delay generated by the hydraulic system, by reducing the heating of the working fluid when flowing through the bypass holes in the metering sleeve 10 for cooling the working fluid to prevent damage and reduce wear of the sliding surfaces, which is due to the fact that the diameter of the mandrel, forming a telescopic joint with o-ring seals located in the tubular housing and restrict the first edge of the sealed chamber, for example, from the upper end of the tubular body (or mustache is rd wells), and the diameter of the inner cylinder tubular body, forming a telescopic connection with the annular seal located in the annular flange of the mandrel and limiting the other end of the sealed chamber, for example, in the lower part of the tubular body (with face), executed, and when the telescopic movement of the mandrel in the housing there is a change in volume of the working fluid and heat it in the compartments of the sealed chamber.

In the curved part of the drill pipe of Yas in each cycle is, for example, 90 seconds at 20 beats per hour, continuous operation may be, for example, 24 hours, while the working fluid (gear oil) is heated, which requires cooling after application of a cycle of beats and the time required for cooling may be in the process, for example, 15 minutes after a cycle shock that raises the cost of idle wells.

The technical result of the invention is to increase the reliability and life, the formation of ultra high impact power in the wellbore at the optimum ratio between the shock and the shock impulse acting up or down to place the tack of the column, and prevent unexpected energizing and strikes hydraulic jar when the drill is NII, descents and ascents of the drill string due to the low accuracy of the time delay generated by the hydraulic system, due to the fact that the longitudinal stroke of the ring valve in the chamber fluid equal to at least the difference of the radii of the outer and inner surfaces, and a stop limiting the longitudinal stroke of the ring valve in the direction of the drummer of the mandrel holds the second seal is formed by a protrusion from the reduced diameter of the inner surface of the shell, which is movably coupled to the second seal drummer mandrel, with at least one drummer mandrel located in the chamber of the working fluid contains its own seal, and the diameter of each of the inner surfaces of the housing forming a movable connection with the appropriate sealant and / or drummer mandrel made equal to the diameter of the mandrel, forming a movable connection is accommodated in the housing, the first seal, for example, within the field of tolerance diameter.

Other technical result of the invention is the provision of a controlled load directed downward, with a particular shock impact, prevent unexpected energizing and strikes hydraulic jar during drilling, descents and ascents of the drill string, the reduction of wear to internal parts, as well as pre the disgust of the destruction of the bit in the borehole due to the fact, what is inside the chamber of the working fluid between the drummers, has a spring-loaded latch mechanism, blocking the longitudinal passage of the mandrel relative to the housing, and the latch mechanism is released or is moved into position under the application of a longitudinal force more marginal, with a longitudinal passage spring latch mechanism, blocking the longitudinal passage of the mandrel relative to the housing, for example, from the beginning of application of force, vdvigaya mandrel into the casing prior to installation of the latch mechanism in operating position, does not exceed the longitudinal course of the ring valve mounted in the chamber of the working fluid.

The invention consists in that the hydraulic drill ACE, consisting of a tubular housing and mandrel, movably connected without rotation between the housing contains the splines on the inner surface, the inner protrusions of the anvil, the first seal with the first end and the mandrel contains the splines on the outer surface under the slots in the housing, the belt of enlarged diameter, drummers, placed between the inner tabs-anvils of the housing and the second seal placed in the drummer from the second end of the body forming a chamber for working fluid, and containing an annular valve having a circular side side, two end, the outer surface is knosti and an internal surface, limited internal cavity mounted in the chamber of the working fluid from the mandrel passing through the internal cavity and located inside the housing, with the inner surface of the annular valve tightly in contact with the belt increased diameter of the mandrel, the longitudinal speed of the ring valve is limited between two lugs projecting from the inner surface of the housing and containing a limiting mechanism for reporting the working fluid in one of the sections of the camera working fluid comprising at least one bypass valve, placed in the annular valve that restricts the period of the working fluid within one of the sections of the camera in one direction, according to the invention the longitudinal stroke of the ring valve in the chamber of the working fluid at least equal to, the difference of the radii of the outer and inner surfaces, and a stop limiting the longitudinal stroke of the ring valve in the direction of the drummer of the mandrel holds the second seal is formed by a protrusion from the reduced diameter of the inner surface of the shell, which is movably coupled to the second seal drummer mandrel, with at least one drummer mandrel located in the chamber of the working fluid contains its own seal and the diameter of each of the inner surfaces of the housing forming on vignae connection with an appropriate sealant and / or drummer mandrel, made equal to the diameter of the mandrel, forming a movable connection is accommodated in the housing, the first seal, for example, within the field of tolerance diameter.

Inside the chamber of the working fluid between the drummers, has a spring-loaded latch mechanism, blocking the longitudinal passage of the mandrel relative to the housing, the latch mechanism locking the longitudinal passage of the mandrel relative to the housing is exempt or is moved into position under the application of a longitudinal force greater limit.

Longitudinal stroke of a spring-loaded latch mechanism, blocking the longitudinal passage of the mandrel relative to the housing, for example, from the beginning of application of force, vdvigaya mandrel into the casing prior to installation of the latch mechanism in operating position, does not exceed the longitudinal course of the ring valve mounted in the chamber of the working fluid.

The performance of hydraulic drill the jar so that the longitudinal speed of the ring valve in the chamber of the working fluid at least equal to, the difference of the radii of the outer and inner surfaces, and a stop limiting the longitudinal stroke of the ring valve in the direction of the drummer of the mandrel holds the second seal is formed by a protrusion from the reduced diameter of the inner surface of the shell, which is movably coupled to the second seal udarn the ka of the mandrel, in this case, at least one drummer mandrel located in the chamber of the working fluid contains its own seal and the diameter of each of the inner surfaces of the housing forming a movable connection with the appropriate sealant and / or drummer mandrel made equal to the diameter of the mandrel, forming a movable connection is accommodated in the housing, the first seal, for example, within the field of tolerance diameter, provides improved reliability and lifetime, and also prevents unexpected activation and strikes hydraulic jar during drilling, descents and ascents of the drill string, and produces ultra high impact power for any shock loads upward (due to stress relaxation in the tension of the drill string)to free from sticking of the drill string and (or) the drilling tool in the well, due to the decreased pressure losses and reduce the time the sudden expansion of the working fluid in the damper compartment sealed chamber for receiving the dynamic impact with a certain shock pulse by increasing the precision of the time delay created by the hydraulics to strike at the optimum ratio between the shock and the shock pulse.

Improving the accuracy of time "Sebastiani the", created by hydraulics to attack, with the optimal ratio between the shock and the shock pulse, allows the operator on the rig to change allowable power tension on the drill string, then apply the brake drawworks. As a consequence, the force upon release of the clamping strap is easily controlled, prevented damage to hoisting equipment.

In addition, this embodiment of the hydraulic drill Yas improves reliability by reducing heating of the working fluid when flowing through the bypass holes in the metering sleeve, which reduces the cooling time, prevents the destruction of, for example, chrome plating, reduces wear on the other of the sliding surfaces, and also reduces the downtime of the well.

In addition, this embodiment of the hydraulic drill Yas increases the effectiveness of the sealing of high pressure, prevents contamination of the mud fluid, and also provides hydrodynamic centering mandrel in the tubular casing, prevents distortions and tacks in the sliding surfaces due to cyclic bending stresses tubular casing during the rotation of the curved the drill pipe string.

The performance of hydraulic drill the jar so that the inside working of the LM the bone, between drummers, has a spring-loaded latch mechanism, blocking the longitudinal passage of the mandrel relative to the housing, the latch mechanism locking the longitudinal passage of the mandrel relative to the housing is exempt or is moved into position under the application of a longitudinal force greater limit, provides a controlled load, directed downwards, with a certain shock pulse, prevents unexpected activation and strikes hydraulic jar during drilling, descents and ascents of the drill string, reduces wear on internal parts and prevents breakage of the bit in the well.

Thus breakage of the bit in the borehole prevented additionally due to the fact that the longitudinal stroke of a spring-loaded latch mechanism, blocking the longitudinal passage of the mandrel relative to the housing, for example, from the beginning of application of force, vdvigaya mandrel into the casing prior to installation of the latch mechanism in operating position, does not exceed the longitudinal course of the ring valve mounted in the chamber of the working fluid.

Below are the best embodiment of a hydraulic drill the jar to release the stuck drill string in the downward directional borehole length of 3900 meters, having a horizontal section 350 meters.

1 shows a hydraulic drilling jar in the context of conventionally connected to the upper, the middle and lower part.

Figure 2 shows the element I in figure 1 the ring valve in the chamber of the working fluid when the tension of the drill string.

Figure 3 shows the element I in figure 1 the ring valve in the chamber of the working fluid when creating a shock, upward.

Figure 4 shows the element II in figure 1 drummer mandrel in the chamber fluid containing its own seal.

Figure 5 shows the element III in figure 1 connection of the parts of the mandrel.

Hydraulic drilling jar consists of a tubular body 1 and the hollow mandrel 2, United without mutual rotation, splined connection 3 between themselves, with the threaded hole 4 of the mandrel 2 is intended for connection with the upper drill pipe, and a threaded shank 5 of the housing 1 is intended for connection with the lower drill pipe shown in figure 1, with the upper and lower drill pipe not shown.

The tubular body 1 made of composite parts 6, 7, 8, 9, 10, 11 and contains an internal ledges-anvil 12, 13, the first seal 14 from the first end 15 and the mandrel 2 made of composite parts 16, 17, 18 and contains a band of enlarged diameter 19, 20 drummers, 21 directed toward the inner tabs-anvils 12 and 13 of the housing 1 and the second ring 22 placed in the drummer 23 from the second end 24 of the housing 1, the contraction in the respective sealed chamber working fluid 25, and contains an annular valve 26 having a circular lateral side 27, the two end face 28 and 29, the outer surface 30 and inner surface 31, a limited internal cavity 32, mounted in the chamber of the working fluid 25 from the mandrel 2, 18, passing through the internal cavity 32, and located inside the housing 1, shown in figures 1, 2, 4, 5.

The internal surface 31 of the ring valve 26 is tightly in contact with the belt enlarged diameter 19 of the mandrel 2, 18, and longitudinal course of the arrow 33 of the ring valve 26 is limited by a stop 34, protruding from the inner surface 32 of the housing 1, 10, shown in figure 2.

The annular valve 26 includes a limiting mechanism 35 messages working fluid 36 from section 37 of the chamber 25 of the working fluid 36 in section 38 of this chamber 25 of the working fluid 36, for example made in the form of by-pass valve 39, placed in the annular valve 26, blocking the flow of fluid 36 in one direction, for example, blocking the flow of working fluid 36, the compressed section 37 of the chamber 25, as shown in figure 1, 2.

The longitudinal passage 40 of the ring valve 26 into the chamber 25 of the working fluid 36 is equal to at least the difference of the radii 41 outer 30 and inner surfaces 31, and a stop limiting the longitudinal passage 40 of the ring valve 26 in the direction of the striker 23 part 18 of the mandrel 2 holds the second seal 22, about atovan ledge 42 of reduced diameter 43 of the inner surface (43) of part 10 of the housing 1, which movably coupled to the second seal 22 of the striker 23 part of the mandrel 2, as shown in figure 1, 2.

Drummer 20 part 18 of the mandrel 2 located in the chamber 25 of the working fluid 36, has its own seal 44, as shown in figure 4.

The diameters 43, 45, 46 of each of the inner surfaces of the housing 1 essentially, the housing parts 10, 9, 7, forming a movable connection with the corresponding seal 22, 44, and drummer 21 part 17 of the mandrel 2, is made equal to the diameter 47 of the mandrel 2, in essence, part 16 of the mandrel 2, forming a movable connection accommodated in the housing 1, in part 6 of the housing 1, the first seal 14, for example, within the field of tolerance diameter 47 of the portion of the mandrel 2, 16, shown in figures 1, 2, 3, 4, 5.

The drummer 21 part 17 of the mandrel 2 posted by ring 48, which do not impede the flow of the working fluid 36 through the longitudinal grooves 49 of the striker 21 of the mandrel 2, and the cavity 50 a sealed working chamber 25 is bounded on one side by the first seal 14 part 6 of the mandrel 2, and on the other hand, by personal seal 44 placed in drummer 20 part 18 of the mandrel 2, as shown in figures 1, 4, 5.

Inside the chamber 25 of the working fluid 36 in the cavity 50 of the working chamber 25 between the drums 20 and 21 parts of the mandrel, respectively, 18 and 17, has a spring-loaded Poppet spring 51 is compressed by means of the rings 52, 53 of the latch mechanism 54, blocking the longitudinal course of the edits 2 relative to the housing 1, when the latch mechanism 54, blocking the longitudinal passage of the mandrel 2 relative to the housing 1, for example, by the arrow 33 and in the opposite direction 55, released or is moved into position under the application of a longitudinal force greater limit, shown in figure 1.

The latch mechanism 54 is made, for example, of the eight segments has a groove 56 and is located between the body portion 8 and a part 17 of the mandrel 2, which has a ring of teeth 57, while the annular groove 56 and the annular teeth 57 are made in different widths, so the latch mechanism 54 locks the mandrel 2 relative to the housing 1 in only one mutual arrangement of annular teeth 57 relative to the annular grooves 56, as shown in figure 1.

A longitudinal passage 58 of a spring-loaded disc springs 51 of the latch mechanism 54, blocking the longitudinal passage of the mandrel 2 relative to the housing 1, for example, from the beginning of application of force in the direction 55, vdvigaya the mandrel 2 into the housing 1, prior to the installation of the latch mechanism 54 in its working position, does not exceed the longitudinal course 40 ring valve 26 installed in the chamber 25 of the working fluid 36, shown in Fig.1, 2.

In addition, figures 1, 2 shows: POS is one of the threaded tubes for filling and pumping of the working fluid 36 in the cavity 37 with a working valve 26 and into the cavity 38, as well as in the cavity 50 of the working chamber 25, in which the size of the received slots in the housing 1 and the mandrel 2, and a spring-loaded latch mechanism 54, blocking the longitudinal passage of the mandrel 2 relative to the housing 1, and POS figure 1 - the direction of flow of the drilling fluid inside the hollow mandrel 2 and the tubular housing 1.

The chamber 25 through the holes of the tube 59 is filled with working fluid 36 (gear oil)produce a pumping working fluid 36 to remove air in the cavity 37 with a working valve 26 and into the cavity 38, as well as in the cavity 50 of the working chamber 25 which is placed in the slots in the housing 1 and the mandrel 2, and a spring-loaded latch mechanism 54, blocking the longitudinal passage of the mandrel 2 relative to the housing 1, and then produce a tightening of the tubes 59.

Make the adjustment (calibration) of a spring-loaded Poppet spring 51 efforts actuation of the latch mechanism 54, blocking the longitudinal passage of the mandrel 2 relative to the housing 1 in the direction of 33 and 55, (installation parameter latch), and the hydraulic delay time shock hydraulic drill the jar in a special stand so that axial forces acting hydraulic drilling jar during drilling, does not exceed, for example, 50% effort actuation of the latch mechanism 54, blocking the longitudinal passage of the mandrel 2 relative to the housing 1, and the effort to unlock the latch 54 to strike up was, for example, 50% of the installation p the parameter latch 54 to strike down.

Determine the best position of Yas in the Assembly of the equipment, the lower part of the drill string, thus take into account many factors, some of which are:

- the expected type of stuck; stuck due to differential pressure or mechanical,

- the state trajectory and the angle of inclination of the well bore,

the configuration of the downhole composition,

- pressure pump,

- the ratio of buoyancy mud,

- the value of the ultimate load on the bit,

allowable tension on the drill string,

- tensile strength drill pipe,

the parameters of the actuation latch on ACE.

Hydraulic drilling jar connect the threaded hole 4 of the mandrel 2 with the lower part of a long elastic drill string used in the drilling and operation of oil wells, and the threaded shank 5 of the housing 1 is connected with the upper part of the drill string, which is located below the jar. The hydrostatic pressure of the drilling fluid inside the hollow mandrel 2 and the tubular housing 1, supplied from the wellhead to the bottom in the direction 60, can be up to 50 MPa.

The movement of Yas at the initial stage is constrained by hydraulically couple the mandrel piston tube body, and up until the drill tubular column will not be created sufficiently high tensile stresses. Stage free Vertica inogo moving parts inside the jar is intended for abrupt withdrawal of part of the tensile stress, accumulated in the string of drill pipes.

Such stress relief or "stretching" of the drill pipe is used to accelerate heavy-weight drill pipe and (or) the total weight of the drill string and create a shock pulse in the borehole depth within the percussion section of this hydraulic jar.

Usually the concentration of large masses directly above the jars, i.e. where the maximum speed at the release of the jar or the completion stage of its free movement, used heavy-weight drill pipe (UBT).

Wave voltage in the string of drill pipes pipes arises due to the sudden stop of the moving masses and couplings (UBT). In the kinetic energy is converted to the energy of the stress state. Wave voltage simultaneously moves up to the muffs and (UBT) and down to the point of sticking. Wave voltage, which is transmitted upward to the couplings or heavy weight, will move up until then, until you reach the designated change in cross-section, for example, the transition from the couplings to the heavy weight and (UBT). Then it will be reflected down. Wave voltage, which originally was moving down from the jar reaches the place of sticking and bounces back up. After some time, the combination of stress waves in place of sticking determines the value of the maximum applied load. About the commonly more than shock pulse attached to the place of sticking, the less shock. While the more dynamic impact, the less shock pulse. Need and impact and momentum.

For immediate release designated sticking requires a certain impact force. At that time, when the impact force exceeds the force of privacyware, the momentum of the blow causes slippage designated sticking. The impact force is the main factor. Best value requires a certain dynamic impact with sufficient shock pulse, essentially, ultra-high impact power.

Optimal location of hydraulic Yas above the transition zone, however, the hydraulic jar can be omitted and below the transition zone. Hydraulic jar down in the hole is blocked by the latch 54, with so many UBT, which provides the necessary pressure on the bit and provides the location of the hydraulic jar above the transition zone.

The bit load pick up, adding or removing UBT under the hydraulic jar, and save on Yas weight, sufficient to provide an effective shock Yas.

Hydraulic drilling jar works from the movement of the drill string in the direction up or down. The magnitude of the impact force directed upwards, is directly proportional to the applied tension force. In this mode, as t is th, as the force of the tension begins to exceed the setting value of the latch 54 when you blow up a mechanical latch sharply is released and begins a hydraulic delay. After a short period of time, the mandrel 2 Yas abruptly released and accelerated to the position of full extension.

Mode kick downwards, as the compression force acting on the jar begins to exceed the setting value of the latch when struck down by a mechanical latch 54 sharply is released, allowing the mandrel 2 to return to the fully closed position.

If the release of stuck in the borehole is the circulation of the drilling fluid, the pressure drop across the bit creates stress, tensile Yas, it is required to consider starting the pump, as it reduces the force needed to strike the jar up and increases the required effort to strike in a downward direction.

To compensate for the loss of friction in the borehole curved columns of drill pipe in an inclined aimed well, you need more tension on the drill pipe string.

The amount of compensation taken into account the indications of the load on the drill pipe during descents and ascents to the sticking of the drill string. The weight of the free column is the weight the hours and columns, located on Yas.

Strikes by Yas in the upward direction.

The force exerted on the jar, must exceed the installation parameter latch 54, but to be less than the recommended maximum load when hydraulic delay, the value of the load on a free column is calculated as the difference between the settings of the latch 54 when struck Yas up and force pump start. To blow up the need to apply the calculated load value, and then set the brake drawworks. The mandrel 2 is pulled out of the housing 1 in the direction 33, and the latch mechanism 54, a spring-loaded Poppet spring 51 is compressed by means of the rings 52, 53, releases the lock ring teeth 57 of the portion 17 of the mandrel 2 in the annular grooves 56 and provides a longitudinal passage of the mandrel 2 relative to the housing 1, is installed inside the chamber 25 of the working fluid 36, essentially, in the cavity 50 of the working chamber 25 between the drums 20 and 21 parts of the mandrel, respectively, 18 and 17.

The working fluid 36 is compressed by the second seal 22 and drummer 23 in the cavity 37 of the working chamber 25 and partially flows into the gap between the shoulder of the enlarged diameter 19 of the portion 18 of the mandrel 2 and the inner surface 31 of the ring valve 26, which contains a limiting mechanism 35 messages working fluid 36 from section 37 of the chamber 25 of the working fluid seccio 38 this camera 25 of the working fluid made in the form of by-pass valve 39, placed in the annular valve 26.

The inner surface 31 of the ring valve 26 is tightly in contact with the belt enlarged diameter 19 of the mandrel 2, 18, and longitudinal course of the arrow 33 of the ring valve 26 is limited by a stop 34, protruding from the inner surface 32 of the housing 1, 10, the pressure of the working fluid 36 in the cavity 37 of the working chamber 25 may be, for example, 200 MPa.

The breakdown of the edges of the belt enlarged diameter 19 of the edge of the inner surface 31 of the ring valve 26 is hydraulic shock fluid using the effect of "sudden expansion", with minimum pressure loss and the formation of ultra high impact power in the wellbore at the optimum ratio between the shock and the shock impulse acting down on the place of sticking columns.

Stretched the column of drill pipe in the course of time, for example, 30 MS loses tension strains, and in pipes and pipe joints occurs the effect of stress relaxation. Wave voltage simultaneously moves up to the muffs and (UBT) and down to the point of sticking. Wave voltage, which is transmitted upward to the couplings or heavy weight, moving up until then, until you reach the designated change in cross-section, such as moving from couplings to the heavy weight and (UBT), then it is trahaetsya down. Wave voltage, which originally was moving down from the jar reaches the place of sticking and bounces back up. After some time, the combination of stress waves in place of sticking determines the value of the maximum applied load.

After the strike in the direction of put up a drill string up until the load indicator will not show the magnitude is less than the weight of the free columns. This means that the latch 54 is again blocked. Yas ready for the next cycle or you can resume drilling.

Strikes by Yas in a downward direction.

The value of the discharge column of the weight of the spare columns is calculated as the sum of power of pump start-up and installation option latch 54 when struck down. Lifting device on the rig pull the string of drill pipes and throw her down, telling the column pulse strike downward.

The mandrel 2 is pushed into the housing 1 in the direction 55, the latch mechanism 54, a spring-loaded Poppet spring 51 is compressed by means of the rings 52, 53, releases the lock ring teeth 57 of the portion 17 of the mandrel 2 in the annular grooves 56 and provides a longitudinal passage of the mandrel 2 relative to the housing 1, is installed inside the chamber 25 of the working fluid 36, essentially, in the cavity 50 of the working chamber 25 between the drums 20 and 21 parts of the mandrel, respectively, 18 and 17.

The working fluid 36 in the cavity 38 of the chamber 25 of the working fluid is compressed own seal 44 of the striker 20 part 18 of the mandrel 2 located in the chamber 25 of the working fluid 36. Increasing the pressure of the working fluid 36 in the cavity 38 of the chamber 25 of the working fluid produces a movement in the direction 55, the annular valve 26, which contains a limiting mechanism 35 messages working fluid 36 from section 37 of the chamber 25 of the working fluid in section 38 of this chamber 25 of the working fluid is made in the form of by-pass valve 39, placed in the annular valve 26.

The longitudinal passage 40 of the ring valve 26 into the chamber 25 of the working fluid 36, is equal to at least the difference of the radii 41 outer 30 and inner surfaces 31, and a stop limiting the longitudinal passage 40 of the ring valve 26 in the direction of the striker 23 part 18 of the mandrel 2 holds the second seal 22 is formed by the protrusion 42 of reduced diameter 43 of the inner surface (43) of part 10 of the housing 1, which is movably coupled to the second seal 22 of the striker 23 part of the mandrel 2.

A longitudinal passage 58 of a spring-loaded disc springs 51 of the latch mechanism 54, blocking the longitudinal passage of the mandrel 2 relative to the housing 1, from the beginning of application of force, for example, in the direction 55, vdvigaya the mandrel 2 into the housing 1, prior to the installation of the latch mechanism 54 in its working position, does not exceed rodallega turn 40 ring valve 26, installed in the chamber 25 of the working fluid 36, as a consequence, the mechanical impact of the striker 20 of the anvil 12 and the blow of the striker 21 of the anvil 13 occurs simultaneously with the hydraulic impact of the working fluid with minimum pressure loss and the formation of ultra high impact power in the wellbore at the optimum ratio between the shock and the shock impulse acting down on the place of sticking columns.

Wave voltage simultaneously moves down to the sticking point and up to the muffs and (UBT). Wave voltage, which is transmitted upward to the couplings or heavy weight, moving up until then, until you reach the designated change in cross-section, such as moving from couplings to the heavy weight and (UBT), then it is reflected downward. Wave voltage, which originally was moving down from the jar reaches the place of sticking and bounces back up. After some time, the combination of stress waves in place of sticking determines the value of the maximum applied load.

In order to again place the clutch latch 54 Yas, raise the drill string up until the load indicator will not lock the increase in weight above the weight of the free columns.

When the movement of the mandrel 2 relative to the housing 1 in the direction of 33 and 55 volume of the working fluid 36 in the two cavities 50 of the working chamber 25, and UMMARY volume of the working fluid 36 in the two cavities 37 and 38 of the working chamber 25, limited seal 22 of the striker 23 part of the mandrel 18 and own seal 44 of the striker 20 parts of the mandrel 18 is not changed due to the fact that the diameters of 43, 45, 46 of each of the internal housing parts 10, 9, 7, forming a movable connection with the corresponding seal 22, 44, and drummer 21 part 17 of the mandrel 2, is made equal to the diameter 47 of the portion 16 of the mandrel 2, forming a flexible connection between the hosts in part 6 of the housing 1, the first seal 14, for example, within the field of tolerance diameter 47 of the portion of the mandrel 16, resulting in decreased heat and cooling the working fluid when flowing through the annular valve 26, the limiting mechanism 35 messages working fluid 36 from section 37 of the chamber 25 of the working fluid 36 in section 38 of this camera, as well as the bypass valve 39.

The proposed construction of a hydraulic drill Yas provides improved reliability and resource forms ultra high impact power in the wellbore at the optimum ratio between the shock and the shock impulse acting up or down to place the tack of the column prevents unexpected activation and strikes during drilling, descents and ascents of the drill string provides controlled burden down, reduces wear of internal parts, and prevents the destruction of the bits in the wells is ine.

Sources of information

1. US 5174393, EV 31/113, Dec. 29, 1992

2. US 5033557, EV 4/06, Jul. 23, 1991 (or EN 2025567, 30.12.1994)

3. US 5647446, EV 31/113, Jul. 15, 1997 - prototype

1. Hydraulic drilling jar comprising a tubular housing and mandrel, movably connected without rotation between the housing contains the splines on the inner surface, the inner protrusions of the anvil, the first seal with the first end and the mandrel contains the splines on the outer surface under the slots in the housing, the belt of enlarged diameter, drummers, placed between the inner tabs-anvils of the housing and the second seal placed in the drummer from the second end of the body forming a chamber for working fluid, and containing an annular valve having a round the side, two end, the outer surface and the inner surface bounded by an internal cavity, mounted in the chamber of the working fluid from the mandrel passing through the internal cavity, and located inside the housing, with the inner surface of the annular valve tightly in contact with the belt increased diameter of the mandrel, the longitudinal speed of the ring valve is limited between two lugs projecting from the inner surface of the housing and containing a limiting mechanism for reporting the working fluid in one of the sections of the camera work is fluid, including at least one bypass valve, placed in the annular valve that restricts the period of the working fluid within one of the sections of the camera in one direction, characterized in that the longitudinal speed of the ring valve in the chamber of the working fluid at least equal to, the difference of the radii of the outer and inner surfaces, and a stop limiting the longitudinal stroke of the ring valve in the direction of the drummer of the mandrel holds the second seal is formed by a protrusion from the reduced diameter of the inner surface of the shell, which is movably coupled to the second seal drummer mandrel, with at least one drummer mandrel located in the chamber of the working fluid contains its own seal and the diameter of each of the inner surfaces of the housing forming a movable connection with the appropriate sealant and / or drummer mandrel made equal to the diameter of the mandrel, forming a movable connection is accommodated in the housing, the first seal, for example, within the field of tolerance diameter.

2. Hydraulic drilling jar according to claim 1, characterized in that inside the chamber of the working fluid between the shock has a spring-loaded latch mechanism, blocking the longitudinal passage of the mandrel relative to the housing, the latch mechanism, a blocking clause is Doliny move the mandrel relative to the housing, released or is moved into position under the application of a longitudinal force greater limit.

3. Hydraulic drilling jar according to claim 2, characterized in that the longitudinal stroke of a spring-loaded latch mechanism, blocking the longitudinal passage of the mandrel relative to the housing, for example, from the beginning of application of force, vdvigaya mandrel into the casing prior to installation of the latch mechanism in operating position, does not exceed the longitudinal course of the ring valve mounted in the chamber of the working fluid.



 

Same patents:

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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.

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Hydraulic catcher // 2291275

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.

1 dwg

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.

1 dwg

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.

1 dwg

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