CN109138888B - Hydraulic low frequency impactor for oil drilling - Google Patents
Hydraulic low frequency impactor for oil drilling Download PDFInfo
- Publication number
- CN109138888B CN109138888B CN201811207390.4A CN201811207390A CN109138888B CN 109138888 B CN109138888 B CN 109138888B CN 201811207390 A CN201811207390 A CN 201811207390A CN 109138888 B CN109138888 B CN 109138888B
- Authority
- CN
- China
- Prior art keywords
- punch rod
- valve
- small
- piston
- anvil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/107—Fishing for or freeing objects in boreholes or wells using impact means for releasing stuck parts, e.g. jars
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Marine Sciences & Fisheries (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Details Of Valves (AREA)
Abstract
本发明涉及一种石油钻井用水力低频冲击器，包括上接头、外筒、蓄能器、活阀、上砧子、下接头，上砧子旋接在外筒和下接头之间，下接头的中部内壁设有下砧子，上砧子的内孔中插接有冲杆，冲杆的下端旋接有冲锤，冲锤位于上砧子与下砧子之间；冲杆的上端设有活阀，活阀位于活阀外套中，活阀外套旋接在上接头与外筒的上端口之间。冲杆中心孔的上端延伸至冲杆的上端开口；冲杆大直径段的上端设有冲杆大凸圈并安装有大活塞，大活塞锁母与上砧子之间的冲杆圆周上设有冲杆径向孔与冲杆中心孔相贯通。冲杆中直径段的上部设有冲杆小凸圈并安装有小活塞，小活塞以上为冲杆小直径段。该石油钻井用水力低频冲击器的制造成本低，动作可靠，使用寿命长。
The present invention relates to a hydraulic low-frequency impactor for oil drilling, comprising an upper joint, an outer tube, an accumulator, a live valve, an upper anvil, and a lower joint. The upper anvil is screwed between the outer tube and the lower joint, the middle inner wall of the lower joint is provided with a lower anvil, a punch rod is inserted into the inner hole of the upper anvil, a hammer is screwed on the lower end of the punch rod, and the hammer is located between the upper anvil and the lower anvil; a live valve is provided at the upper end of the punch rod, the live valve is located in the live valve jacket, and the live valve jacket is screwed between the upper joint and the upper port of the outer tube. The upper end of the punch rod center hole extends to the upper end opening of the punch rod; the upper end of the punch rod large diameter section is provided with a punch rod large convex ring and a large piston is installed, and the punch rod radial hole is provided on the punch rod circumference between the large piston lock nut and the upper anvil and is connected with the punch rod center hole. The upper part of the punch rod medium diameter section is provided with a punch rod small convex ring and a small piston is installed, and the small diameter section of the punch rod is above the small piston. The manufacturing cost of the hydraulic low-frequency impactor for oil drilling is low, the action is reliable, and the service life is long.
Description
Technical Field
The invention relates to an impactor for unlocking, in particular to a hydraulic low-frequency impactor for petroleum drilling, and belongs to the technical field of petroleum exploitation drilling tools.
Background
During the production process of an oil-water well, the drill sticking fault is frequently caused by various factors. There are various treatment schemes depending on the type of stuck drill. Hydraulic cocker unclamping is a relatively common type of treatment solution in all. The traditional hydraulic upper jar is mainly single jarred, and after one jar is carried out, the jar needs to be reset to carry out the next jar. In some special cases, however, continuous high frequency jars are required, with conventional jars being spaced relatively long apart and often with no apparent jarring effect.
The impactor is widely applied to petroleum drilling and can generate high-frequency vibration. The current well drilling impacter is generally provided with a hollow impact hammer with a piston, and a movable valve is arranged at the upper part of the impact hammer. The mud flows to the drill bit through the hammer and the anvil center of the lower joint of the hammer. The spring on the impact hammer forces the hammer contact valve to close the impact hammer central flow passage, the impact hammer and the valve move downwards at high speed under the action of the slurry pressure at the upper part, the impact anvil and the drill bit, the movable valve is opened firstly and returns to the original position under the action of the spring, then the impact hammer moves upwards to the valve under the action of the rebound of the anvil and the spring force, and the up-and-down reciprocating motion is started, so that the high-frequency impact of the drill bit is generated.
The traditional high-frequency impactor has low liquid energy conversion efficiency because of the need of using a spring. The spring is easy to break in repeated vibration, and a conventional sealing piece is generally adopted on the impact hammer, so that the impact hammer has low strength and short service life under the condition of high-speed movement.
Disclosure of Invention
The invention aims to solve the problems that a spring is easy to break and a sealing part is easy to damage in the prior art, and provides a hydraulic low-frequency impactor for petroleum drilling, which has the advantages of low manufacturing cost, reliable action and long service life.
In order to solve the technical problems, the hydraulic low-frequency impactor for petroleum drilling comprises an upper connector, an outer barrel, an upper anvil and a lower connector, wherein the periphery of the upper end of the upper anvil is connected in the lower port of the outer barrel in a screwed mode, the periphery of the lower end of the upper anvil is connected in the upper port of the lower connector in a screwed mode, an inner step serving as the lower anvil is arranged on the inner wall of the middle of the lower connector, a punch rod in clearance fit is inserted in an inner hole of the upper anvil, a punch hammer is connected at the lower end of the punch rod in a screwed mode, the punch hammer is located between the upper anvil and the lower anvil, a movable valve for controlling the punch rod is arranged at the upper end of the punch rod, the movable valve comprises a movable valve outer sleeve, and the movable valve outer sleeve is connected between the upper connector and the upper port of the outer barrel in a screwed mode.
Compared with the prior art, the hydraulic control system has the advantages that when the movable valve is opened, under a certain displacement, a certain throttling pressure difference is generated when water flows through the clearance between the plunger and the upper anvil, the hydraulic pressure above the upper anvil enables the plunger to move upwards, when the upper end of the plunger is contacted with the movable valve, the upper port of the plunger is closed by the movable valve, the liquid flow is blocked, the water hammer is generated, and under the action of inertia, the plunger moves upwards continuously to impact the upper anvil, so that the pipe column vibrates. When the upward movement is finished, under the action of water flow and dead weight, the punch rod and the punch hammer quickly return downwards, the lower anvil in the lower joint is impacted by larger kinetic energy, the downward impact action is completed, and at the moment, the upper port of the punch rod is separated from the movable valve again. Therefore, the impact hammer continuously reciprocates between the upper anvil and the lower anvil, so that the clamped pipe column vibrates, and the aim of unclamping is fulfilled.
The large-diameter section of the punch rod extends upwards from the inner hole of the upper anvil, a large punch rod convex ring protruding outwards is arranged at the upper end of the large punch rod convex ring, a large piston is arranged below the large punch rod convex ring, the periphery of the large piston is attached to the inner wall of the large aperture section of the outer cylinder, a large piston lock nut is pressed below the large piston, the large piston lock nut is screwed on the outer thread of the large punch rod diameter section, and punch rod radial holes are symmetrically arranged on the circumference of the large punch rod diameter section between the lower end face of the large piston lock nut and the upper end face of the upper anvil, and the large punch rod radial holes are communicated with the large punch rod center hole. When the upper end of the plunger is contacted with the movable valve, the upper end of the plunger is closed by the movable valve, the liquid flow is blocked, the water hammer continues to move upwards under the action of inertia, and the upper anvil is impacted, so that the tubular column vibrates. After the liquid flow of the central hole of the plunger rod is blocked, the hydraulic pressure of the lower cavity of the large piston rapidly drops, the plunger rod and the plunger hammer rapidly return under the action of the water flow and the dead weight, the lower anvil in the lower connector is impacted by larger kinetic energy, the downward impact action is completed, and the upper port of the plunger rod is separated from the movable valve again.
As a further improvement of the invention, a punch middle diameter section is arranged above the punch large convex ring, a punch small convex ring which protrudes outwards is arranged at the upper part of the punch middle diameter section, a punch small diameter section is arranged at the upper part of the punch small convex ring, a small piston is arranged at the upper part of the punch small convex ring, the periphery of the small piston is attached to the inner wall of the outer cylinder small bore section, a small piston lock nut is pressed above the small piston, and the small piston lock nut is screwed on the external thread of the punch small diameter section. When the upper port of the punch rod is in contact with the movable valve, the liquid flow in the central hole of the punch rod is blocked, the liquid flow on the periphery of the punch rod acts on the upper end face of the small piston to push the punch rod to move downwards, and meanwhile, under the dead weight action of the punch rod and the punch hammer, the punch hammer impacts the lower anvil with larger kinetic energy to complete downward impact action, so that the tubular column vibrates. At this time, the upper port of the plunger is separated from the movable valve, a part of liquid flow enters the central hole of the plunger and descends, flows outwards from the radial hole of the plunger and enters the annular space of the lower cavity of the large piston to act on the lower end face of the large piston, and the other part of liquid flow still acts on the upper end face of the small piston. Therefore, the impact hammer continuously reciprocates between the upper anvil and the lower anvil, so that the clamped pipe column vibrates, and the aim of unclamping is fulfilled. The impact hammer and the movable valve are reset without the help of a spring, so that the impact hammer is reliable in action and long in service life.
As a further improvement of the invention, a valve seat is arranged in the lower inner cavity of the movable valve sleeve, a valve seat center hole with a closed upper end is arranged in the center of the valve seat, a valve core is inserted in the valve seat center hole, the valve core is in an inverted T-shaped section with a narrow upper part and a wide lower part, an upward concave valve core groove is arranged in the center of the lower end surface of the valve core, an upward extending valve core center counter bore is arranged in the center of the bottom wall of the valve core groove, an annular area on the periphery of the valve core groove is matched with the upper port of the punch rod, a disc spring is supported between the back surface of the large end of the valve core and the lower end surface of the valve seat, and a movable valve water through hole which is axially communicated is arranged at the position, close to the inner wall of the movable valve sleeve, of the valve seat. The cross section area of the lower end of the valve core is larger, the liquid flow flowing downwards from the central hole of the upper joint passes through the water through hole of the movable valve, acts on the step of the valve core, pushes the valve core downwards together with the disc spring, so that the valve core is pressed on the upper port of the punch rod, and the liquid flow of the central hole of the punch rod is reliably blocked. When the plunger is upward by means of larger lifting force generated by the large piston, the plunger is contacted with the sealing surface of the valve core again and pushes the valve core to move upwards, the disc spring is compressed, the elasticity of the disc spring ensures that the valve core is reliably contacted with an upper port of the plunger on one hand, and energy is stored when the disc spring is compressed on the other hand, so that the valve core moves downwards more forcefully and is faster, and the downward striking speed of the plunger is accelerated.
As a further improvement of the invention, a stop collar for limiting the downward stroke of the valve core is arranged on a step at the upper part of the inner wall of the small-bore section of the outer cylinder, the lower end of the outer sleeve of the movable valve is pressed on the stop collar, the upper part of the small-diameter section of the plunger rod passes through a central hole of the stop collar, and a stop collar water tank for water to pass through is arranged on the stop collar. When the upper port of the plunger is in contact with the movable valve, the liquid flow in the central hole of the plunger is blocked, the liquid flow on the periphery of the plunger acts on the upper end face of the small piston to push the plunger to move downwards, and the disc spring pushes the valve core to move downwards synchronously, so that the sealing surface of the valve core keeps attached to the upper port of the plunger, the plunger impacts the lower anvil with larger kinetic energy, downward impact is completed, and the tubular column vibrates. When the valve core contacts the limiting sleeve, the plunger stops descending, the plunger continues descending under the action of liquid flow pressure, gravity and inertia to finish impact, at the moment, the upper port of the plunger is opened, liquid flow enters the central hole of the plunger, and then quickly enters the lower cavity of the large piston, the lifting force generated by the large piston is larger than the resistance of the small piston to enable the plunger to ascend, when the upper end of the plunger contacts the valve core again, the upper port of the plunger is closed by the movable valve, the liquid flow is blocked, the water impact effect is generated, and under the action of inertia, the plunger continues to ascend to impact the upper anvil, so that the pipe column vibrates again.
As a further improvement of the invention, the upper part of the valve core is provided with a valve core sealing ring which is jointed with the valve seat central hole, the upper end of the valve seat central hole is connected with a valve seat radial hole which extends outwards in the radial direction and penetrates through the valve seat central hole, and the outer end of the valve seat radial hole is connected with a piston valve filter plug in a screwed mode. When the valve core moves downwards, liquid flows through the piston filter plug, enters the valve seat central hole from the radial hole of the valve seat after being filtered, and is supplemented into the upper cavity of the valve core, so that the resistance of the valve core in the up-and-down movement can be reduced, and the action of the piston valve is more sensitive.
As a further improvement of the invention, the lower part of the small-aperture section of the outer cylinder is symmetrically provided with radially through outer cylinder water filtering holes, the outer ends of the outer cylinder water filtering holes are respectively connected with outer cylinder filter plugs in a screwed manner, and the outer cylinder water filtering holes are positioned between the small punch rod convex ring and the large punch rod convex ring in the height direction. When the large piston pushes the plunger rod to go up, the volume of the upper cavity of the large piston gradually becomes smaller, and liquid is discharged from the outer cylinder filter plug. When the valve core closes the upper port of the central hole of the plunger rod, the small piston pushes the plunger rod to move downwards, the lower cavity of the large piston is depressurized, liquid flow flows out from the clearance between the plunger rod and the upper anvil, the volume of the upper cavity of the large piston gradually increases, and external liquid flow enters the upper cavity of the large piston after filtering the outer cylinder filter plug. Therefore, the resistance of the punch rod in the ascending or descending process can be reduced, and the impact of the punch hammer is more powerful.
As a further improvement of the invention, an upper anvil convex ring which protrudes outwards is arranged on the periphery of the middle part of the upper anvil, the lower port of the outer cylinder is pressed on the upper end face of the upper anvil convex ring, and the upper port of the lower joint is pressed on the lower end face of the upper anvil convex ring. The upper anvil convex ring is favorable for realizing axial positioning between the upper anvil and the outer cylinder as well as between the upper anvil and the lower joint, and can be fixed by a set screw to prevent loosening after screwing to the bottom.
As a further improvement of the invention, an upper joint inner boss protruding towards the axis direction is arranged below the conical female screw thread of the upper joint, a plurality of upper joint water through holes penetrating along the axial direction are arranged on the circumference of the upper joint inner boss, and an energy accumulator component extending downwards is screwed in an inner hole of the upper joint inner boss. The upper joint water through hole on the boss in the upper joint keeps the liquid flow between the central hole of the upper joint and the piston unblocked, when the plunger rod is upward, the liquid flow in the small upper cavity flows upwards from the water through hole of the piston valve, so that the upper cavity of the valve seat generates high pressure, and the hydraulic energy can be stored in the energy accumulator component so as to increase the kinetic energy of the impact hammer during downward impact.
As a further improvement of the invention, the energy accumulator assembly comprises an energy accumulator cylinder with a closed top and an open lower end, the lower end port of the energy accumulator cylinder is rotatably connected with an energy accumulator screw head, a through screw head center hole is arranged along the axis of the energy accumulator screw head, an energy accumulator piston matched with the inner wall of the energy accumulator cylinder is arranged above the energy accumulator screw head, and an energy accumulator spring is supported between the top surface of the energy accumulator piston and the top wall of the energy accumulator cylinder. When the large piston pushes the plunger rod to ascend, the volume of the upper cavity of the small piston is reduced, liquid flows into the upper cavity of the valve seat through the water through hole of the movable valve, so that the pressure of the upper cavity of the valve seat is increased, the accumulator piston ascends under the action of hydraulic pressure, the accumulator spring is compressed, the hydraulic energy is converted into the elastic potential energy of the accumulator spring, meanwhile, the resistance of the plunger hammer in the ascending process is reduced, and the upward striking impact force of the plunger hammer is increased. When the impact hammer finishes the up-striking, the upper port of the impact rod is closed by the valve core, so that the lower cavity of the large piston is depressurized, the liquid flow and the gravity push the small piston to move downwards, and at the moment, the energy accumulator spring pushes the energy accumulator piston to move downwards, so that the pressure on the small piston is increased, and the down-striking of the impact hammer is more powerful.
Drawings
The invention will now be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration only and are not intended to limit the invention.
FIG. 1 is a front view of the hydraulic low frequency impactor for oil drilling of the present invention.
Fig. 2 is a schematic view of the ram assembly of fig. 1.
Fig. 3 is an enlarged view of the upper half of fig. 1.
Fig. 4 is an enlarged view of the lower half of fig. 1.
In the drawings, an upper joint, a conical female screw thread, an upper joint water through hole, a 2 energy accumulator assembly, a 2a energy accumulator cylinder, a 2b energy accumulator spring, a 2c energy accumulator piston, a 2d energy accumulator screw head, a 2d1 energy accumulator screw head center hole, a 3 living valve, a 3a living valve jacket, a 3b valve seat, a 3b1 valve seat center hole, a 3b2 living valve water through hole, a 3b3 valve seat radial hole, a 3b4 living valve filter plug, a 3c valve core, a 3c1 valve core groove, a 3c2 valve core center counter bore, a 3d valve core sealing ring, a 3e disc spring, a 4a outer cylinder, a 4a filter plug, a 5a limit sleeve water groove, a 6a punch rod, a small diameter section of the punch rod, a 6b, a small punch rod convex ring, a 6d large punch rod convex ring, a 6e large diameter section of the hammer rod, a 6f center rod, a 6c, a 7 c 2c, a large diameter section of the piston rod, a 7 d, a piston plug, a 8, a large plug seat, a 3e, a small plug hole, a 8 c, a small plug seat, a 7 c, a piston plug hole, a 8, a large plug hole, a 10a large plug seat, a 8, a small plug hole, a 10a plug hole, a small plug hole, a 8, a plug hole, a small plug hole, a plug hole, a 10, a and a plug hole, a 10.
Detailed Description
As shown in fig. 1 to 4, the hydraulic low-frequency impactor for petroleum drilling comprises an upper joint 1, an outer barrel 4, an upper anvil 10 and a lower joint 11, wherein the upper end periphery of the upper anvil 10 is screwed into the lower port of the outer barrel 4, the lower end periphery of the upper anvil 10 is screwed into the upper port of the lower joint 11, the lower end of the lower joint 11 is provided with a conical male thread 11b connected with the lower pipe column, the inner wall of the middle part of the lower joint 11 is provided with an inner step serving as a lower anvil 11a, a punch 6 which is in clearance fit is inserted into an inner hole of the upper anvil 10, the lower end of the punch 6 is screwed with a punch hammer 9, the punch hammer 9 is positioned between the upper anvil 10 and the lower anvil 11a, the upper end of the punch 6 is provided with a movable valve 3 for controlling the punch 6, the movable valve 3 comprises a movable valve jacket, and the movable valve jacket is screwed between the upper joint 1 and the upper port of the outer barrel 4.
The middle part periphery of upper anvil 10 is equipped with the outer convex upper anvil bulge loop 10a of outwards protrusion, and the lower port of urceolus 4 presses the up end of upper anvil bulge loop 10a, and the upper port of lower clutch 11 presses the lower terminal surface of upper anvil bulge loop 10 a. The upper anvil convex ring 10a is favorable for realizing axial positioning between the upper anvil 10 and the outer cylinder 4 and the lower joint 11, and can be fixed by a set screw to prevent loosening after screwing to the bottom.
When the movable valve is opened, under a certain displacement, a certain throttling pressure difference is generated when water flows through the clearance between the punch rod 6 and the upper anvil 10, the hydraulic pressure above the upper anvil 10 enables the punch rod 6 to ascend, when the upper end of the punch rod 6 is contacted with the movable valve, the movable valve closes the upper port of the punch rod 6, the liquid flow is blocked, the water striking effect is generated, and under the inertia effect, the punch hammer 9 continues to ascend to strike the upper anvil 10, so that the pipe column vibrates. When the upward movement is finished, under the action of water flow and dead weight, the punch rod 6 and the punch hammer 9 quickly return downwards, the lower anvil 11a in the lower connector 11 is impacted by larger kinetic energy, the downward impact action is completed, and at the moment, the upper port of the punch rod 6 is separated from the movable valve again. In this way, the punch hammer 9 continuously reciprocates between the upper anvil 10 and the lower anvil 11a, so that the clamped pipe column vibrates, and the aim of unclamping is fulfilled.
The punch rod 6 is of an upper thin and lower thick structure, a punch rod central hole 6f with a closed lower end is formed along the axis of the punch rod 6, the upper end of the punch rod central hole 6f extends to an upper end opening of the punch rod 6, a punch rod large-diameter section 6e extends upwards from an inner hole of the upper anvil 10, a punch rod large-diameter convex ring 6d protruding outwards is arranged at the upper end of the punch rod large-diameter section 6e, a large piston 8 is mounted below the punch rod large-diameter convex ring 6d, the periphery of the large piston 8 is attached to the inner wall of the large-diameter section of the outer cylinder, a large piston lock nut 8a is pressed below the large piston 8, the large piston lock nut 8a is screwed on an outer thread of the punch rod large-diameter section 6e, a punch rod radial holes 6g are symmetrically formed on the circumference of the punch rod large-diameter section 6e between the lower end face of the large piston lock nut 8a and the upper end face of the upper anvil 10, and the punch rod radial holes 6g are communicated with the punch rod central hole 6 f. When the upper end of the plunger 6 is separated from the movable valve, liquid flow enters the plunger central hole 6f and flows downwards, flows outwards from the plunger radial hole 6g and enters the annular space of the lower cavity of the large piston 8, hydraulic pressure acts on the lower end face of the large piston 8 to push the large piston 8 to drive the plunger 6 to move upwards, when the upper end of the plunger 6 is contacted with the movable valve, the movable valve closes the upper end of the plunger 6, the liquid flow is blocked, water impact is generated, and under the action of inertia, the plunger 9 continues to move upwards to impact the upper anvil 10, so that the pipe column vibrates. After the liquid flow of the punch rod center hole 6f is blocked, the hydraulic pressure of the lower cavity of the large piston 8 rapidly drops, the punch rod 6 and the punch hammer 9 rapidly return under the action of the water flow and the dead weight, the lower anvil 11a in the lower connector 11 is impacted by larger kinetic energy, the downward impact action is completed, and at the moment, the upper port of the punch rod 6 is separated from the movable valve again.
The upper part of the punch rod large convex ring 6d is a punch rod middle diameter section 6c, the upper part of the punch rod middle diameter section 6c is provided with a punch rod small convex ring 6b protruding outwards, the upper part of the punch rod small convex ring 6b is a punch rod small diameter section 6a, a small piston 7 is installed on the upper part of the punch rod small convex ring 6b, the periphery of the small piston 7 is attached to the inner wall of the outer cylinder small bore section, a small piston lock nut 7a is pressed above the small piston 7, and the small piston lock nut 7a is screwed on the external thread of the punch rod small diameter section 6 a. When the upper port of the punch rod 6 is in contact with the movable valve, the liquid flow of the punch rod center hole 6f is blocked, the liquid flow at the periphery of the punch rod 6 acts on the upper end face of the small piston 7 to push the punch rod 6 to move downwards, and meanwhile, under the dead weight action of the punch rod 6 and the punch hammer 9, the punch hammer 9 impacts the lower anvil 11a with larger kinetic energy to finish downward impact action, so that the pipe column vibrates. At this time, a part of liquid flow enters the central hole 6f of the plunger and descends, flows outwards from the radial hole 6g of the plunger and enters the annular space of the lower cavity of the large piston 8 to act on the lower end face of the large piston 8, and the other part of liquid flow still acts on the upper end face of the small piston 7, so that the plunger 6 is forced to ascend due to the fact that the area of the large piston 8 is larger than that of the small piston 7, the upper port of the plunger 6 is closed by the movable valve when the upper end of the plunger 6 is contacted with the movable valve, the liquid flow is blocked, water impact is generated, and the plunger 9 continues to ascend under the inertia effect to impact the upper anvil 10, so that the pipe column vibrates again. In this way, the punch hammer 9 continuously reciprocates between the upper anvil 10 and the lower anvil 11a, so that the clamped pipe column vibrates, and the aim of unclamping is fulfilled. The impact hammer 9 and the movable valve are reset without the help of a spring, so that the action is reliable and the service life is long.
The inner cavity of the lower part of the movable valve sleeve 3a is provided with a valve seat 3b, the center of the valve seat 3b is provided with a valve seat center hole 3b1 with a closed upper end, a valve core 3c is inserted into the valve seat center hole 3b1, the valve core 3c is of an inverted T-shaped section with a narrow upper part and a wide lower part, the center of the lower end face of the valve core 3c is provided with an upward concave valve core groove 3c1, the center of the bottom wall of the valve core groove 3c1 is provided with an upward extending valve core center counter bore 3c2, the annular area of the periphery of the valve core groove 3c1 is matched with the upper port of the punch rod 6, a disc spring 3e is supported between the back face of the large end of the valve core 3c and the lower end face of the valve seat 3b, and a movable valve water through hole 3b2 which is axially penetrated is arranged at the position of the valve seat 3b close to the inner wall of the movable valve sleeve 3 a. The valve core groove 3c1 reduces the processing area of the valve core sealing surface, the valve core center counter bore 3c2 lightens the weight of the valve core 3c, so that the valve core is more flexible, the cross section area of the lower end of the valve core 3c is larger, liquid flow flowing downwards from the upper joint center hole passes through the movable valve water through hole 3b2 and acts on the step of the valve core 3c, and the valve core 3c is pushed to move downwards together with the disc spring 3e, so that the valve core 3c is pressed on the upper port of the punch rod 6, and the liquid flow of the punch rod center hole 6f is reliably blocked. When the plunger 6 returns upwards by means of the larger lifting force generated by the large piston 8, the plunger 6 contacts the valve core sealing surface again and pushes the valve core 3c to move upwards, the disc spring 3e is compressed, the elasticity of the disc spring 3e ensures that the valve core 3c is reliably contacted with the upper port of the plunger on one hand, and energy is stored when the disc spring 3e is compressed on the other hand, so that the valve core 3c moves downwards more forcefully and faster, and the downward striking speed of the hammer 9 is accelerated.
A stop collar 5 for limiting the downward stroke of the valve core 3c is arranged on a step at the upper part of the inner wall of the small-bore section of the outer barrel, the lower end of the valve sleeve 3a is pressed on the stop collar 5, the upper part of the small-diameter section 6a of the plunger rod passes through a central hole of the stop collar 5, and a stop collar water tank 5a for water to pass through is arranged on the stop collar 5. When the upper port of the plunger 6 is in contact with the movable valve, the liquid flow of the plunger central hole 6f is blocked, the liquid flow at the periphery of the plunger 6 acts on the upper end face of the small piston 7 to push the plunger 6 to move downwards, the disc spring 3e pushes the valve core 3c to move downwards synchronously, the sealing surface of the valve core 3c is kept attached to the upper port of the plunger 6, the plunger 9 impacts the lower anvil 11a with larger kinetic energy, downward impact is completed, and the tubular column vibrates. When the valve core 3c contacts the limiting sleeve 5, the plunger 6 continues to descend under the action of liquid flow pressure, gravity and inertia to finish impact, at the moment, the upper port of the plunger 6 is opened, liquid flow enters the plunger central hole 6f and then quickly enters the lower cavity of the large piston 8, the lifting force generated by the large piston 8 is larger than the resistance of the small piston 7 to enable the plunger 6 to ascend, when the upper end of the plunger 6 contacts the valve core 3c again, the upper port of the plunger 6 is closed by the movable valve, the liquid flow is blocked, the water impact effect is generated, and under the action of inertia, the plunger 9 continues to ascend to impact the upper anvil 10, so that the pipe column vibrates again.
The upper part of the valve core 3c is provided with a valve core sealing ring 3d which is attached to the valve seat central hole 3b1, the upper end of the valve seat central hole 3b1 is connected with a valve seat radial hole 3b3 which extends outwards along the radial direction and penetrates through the valve seat central hole, and the outer end of the valve seat radial hole 3b3 is connected with a movable valve filter plug 3b4 in a rotating mode. The valve core sealing ring 3d enables the upper end of the valve core 3c to be sealed with the valve seat central hole 3b1, when the valve core 3c moves upwards, liquid flow in the valve seat central hole 3b1 is pushed to be discharged from the valve seat radial hole 3b3 and the movable valve filter plug 3b4, when the valve core 3c moves downwards, liquid flow enters the valve seat central hole 3b1 from the valve seat radial hole 3b3 after being filtered by the movable valve filter plug 3b4, and the liquid is fed into the upper cavity of the valve core 3c, so that resistance when the valve core 3c moves up and down can be reduced, and the action of the movable valve is more sensitive.
The lower part of the small-aperture section of the outer cylinder is symmetrically provided with outer cylinder water filtering holes which are penetrated along the radial direction, the outer ends of the outer cylinder water filtering holes are respectively connected with an outer cylinder filter plug 4a in a screwed manner, and the outer cylinder water filtering holes are positioned between the small punch rod convex ring 6b and the large punch rod convex ring 6d in the height direction. When the large piston 8 pushes the plunger 6 upward, the volume of the upper chamber of the large piston 8 gradually becomes smaller, and the liquid is discharged from the outer cylinder filter plug 4 a. When the valve core 3c closes the upper port of the punch rod center hole 6f, the small piston 7 pushes the punch rod 6 to move downwards, the lower cavity of the large piston 8 is depressurized, liquid flow flows out from the clearance between the punch rod 6 and the upper anvil 10, the volume of the upper cavity of the large piston 8 gradually increases, and external liquid flow enters the upper cavity of the large piston 8 after the outer cylinder filter plug 4a is filtered. Thus, the resistance of the punch rod 6 in the ascending or descending process can be reduced, and the impact of the punch hammer 9 is more powerful.
The inner cavity of the upper joint 1 is provided with a conical female thread 1a connected with an upper square pipe column, an upper joint inner boss protruding towards the axis direction is arranged below the conical female thread 1a, a plurality of upper joint water through holes 1b penetrating along the axial direction are formed in the circumference of the upper joint inner boss, and an energy accumulator component 2 extending downwards is screwed in the inner hole of the upper joint inner boss. The upper joint water through hole 1b on the boss in the upper joint keeps the liquid flow between the central hole of the upper joint and the piston smooth, when the punch rod 6 goes up, the liquid flow in the upper cavity of the small piston 7 flows upwards from the movable valve water through hole 3b2, so that the upper cavity of the valve seat 3b generates high pressure, and hydraulic energy can be stored in the energy accumulator component 2 so as to increase the kinetic energy when the punch hammer 9 hits downwards.
The energy accumulator assembly 2 comprises an energy accumulator cylinder body 2a with a closed top and an open lower end, an energy accumulator screw head 2d is screwed at the lower end port of the energy accumulator cylinder body 2a, a through screw head center hole 2d1 is arranged along the axis of the energy accumulator screw head 2d, an energy accumulator piston 2c matched with the inner wall of the energy accumulator cylinder body 2a is arranged above the energy accumulator screw head 2d, and an energy accumulator spring 2b is supported between the top surface of the energy accumulator piston 2c and the top wall of the energy accumulator cylinder body 2 a. When the large piston 8 pushes the punch rod 6 to ascend, the volume of the upper cavity of the small piston 7 is reduced, liquid flows into the upper cavity of the valve seat 3b through the water through hole 3b2 of the movable valve, so that the pressure of the upper cavity of the valve seat is increased, the energy accumulator piston 2c ascends under the hydraulic action, the energy accumulator spring 2b is compressed, the hydraulic energy is converted into the elastic potential energy of the energy accumulator spring 2b, meanwhile, the resistance when the punch hammer 9 ascends is reduced, and the upward striking impact force of the punch hammer 9 is increased. When the impact hammer 9 finishes the up-striking, the upper port of the impact rod 6 is closed by the valve core 3c, so that the lower cavity of the large piston 8 is depressurized, the liquid flow and the gravity push the small piston 7 to move downwards, at the moment, the energy accumulator spring 2b pushes the energy accumulator piston 2c to move downwards, the pressure on the small piston 7 is increased, and the down-striking of the impact hammer 9 is more powerful.
The above is only a preferred practical embodiment of the present invention, and is not limited to the scope of the present invention. In addition to the embodiments described above, other embodiments of the invention are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the invention. The technical features of the present invention that are not described may be implemented by or using the prior art, and are not described herein.
Claims (6)
1. The hydraulic low-frequency impactor for petroleum drilling comprises an upper connector, an outer barrel, an upper anvil and a lower connector, wherein the periphery of the upper end of the upper anvil is screwed in the lower port of the outer barrel, and the periphery of the lower end of the upper anvil is screwed in the upper port of the lower connector; the upper end of the plunger is provided with a movable valve for controlling the plunger, the movable valve comprises a movable valve sleeve, and the movable valve sleeve is screwed between the upper joint and the upper port of the outer barrel;
The large-diameter section of the punch rod extends upwards from the inner hole of the upper anvil, the upper end of the large-diameter section of the punch rod is provided with a large punch rod convex ring protruding outwards, a large piston is arranged below the large punch rod convex ring, the periphery of the large piston is attached to the inner wall of the large-aperture section of the outer cylinder, a large piston lock nut is pressed below the large piston, the large piston lock nut is screwed on the outer thread of the large-diameter section of the punch rod, and the large piston lock nut is symmetrically provided with punch rod radial holes on the circumference of the large-diameter section of the punch rod between the lower end face of the large piston lock nut and the upper end face of the upper anvil, and the punch rod radial holes are communicated with the large-diameter section of the punch rod;
The upper part of the large punch rod convex ring is a punch rod middle diameter section, the upper part of the punch rod middle diameter section is provided with a punch rod small convex ring which protrudes outwards, the upper part of the punch rod small convex ring is a punch rod small diameter section, a small piston is arranged on the upper part of the punch rod small convex ring, the periphery of the small piston is attached to the inner wall of the small hole diameter section of the outer cylinder, a small piston lock nut is pressed above the small piston, and the small piston lock nut is screwed on the external thread of the punch rod small diameter section;
An upper anvil convex ring which protrudes outwards is arranged on the periphery of the middle part of the upper anvil, the lower port of the outer cylinder is pressed on the upper end face of the upper anvil convex ring, and the upper port of the lower joint is pressed on the lower end face of the upper anvil convex ring;
The valve is characterized in that a valve seat is arranged in an inner cavity of the lower part of the valve housing, a valve seat center hole with a closed upper end is arranged in the center of the valve seat, a valve core is inserted in the valve seat center hole, the valve core is of an inverted T-shaped section with a narrow upper part and a wide lower part, an upward concave valve core groove is arranged in the center of the lower end face of the valve core, an upward extending valve core center counter bore is arranged in the center of the bottom wall of the valve core groove, an annular area on the periphery of the valve core groove is matched with an upper port of the punch rod, a disc spring is supported between the back surface of the large end of the valve core and the lower end face of the valve seat, and a valve water through hole of the valve seat, which is communicated along the axial direction, is arranged at a position of the valve seat, which is close to the inner wall of the valve housing.
2. The hydraulic low-frequency impactor for petroleum drilling according to claim 1, wherein a limit sleeve for limiting the downward stroke of the valve core is arranged on a step at the upper part of the inner wall of the small-bore section of the outer barrel, the lower end of the outer sleeve of the movable valve is pressed on the limit sleeve, the upper part of the small-diameter section of the plunger rod passes through a central hole of the limit sleeve, and a limit sleeve water tank for water to pass through is arranged on the limit sleeve.
3. The hydraulic low-frequency impactor for petroleum drilling as defined in claim 1, wherein a valve core sealing ring is mounted on the upper portion of the valve core and is attached to the valve seat central hole, a valve seat radial hole which extends outwards in the radial direction and penetrates through the upper end of the valve seat central hole is connected with the upper end of the valve seat central hole, and a movable valve filter plug is screwed on the outer end of the valve seat radial hole.
4. The hydraulic low-frequency impactor for petroleum drilling according to claim 1, wherein the lower part of the small-aperture section of the outer barrel is symmetrically provided with outer barrel water filtering holes which are penetrated along the radial direction, the outer ends of the outer barrel water filtering holes are respectively connected with an outer barrel water filtering plug in a screwed manner, and the outer barrel water filtering holes are positioned between the small punch rod convex ring and the large punch rod convex ring in the height direction.
5. The hydraulic low-frequency impactor for petroleum drilling according to any one of claims 1 to 4, wherein an upper joint inner boss protruding towards the axial direction is arranged below the conical female thread of the upper joint, a plurality of upper joint water through holes penetrating along the axial direction are arranged on the circumference of the upper joint inner boss, and an energy accumulator component extending downwards is screwed in an inner hole of the upper joint inner boss.
6. The hydraulic low-frequency impactor for petroleum drilling according to claim 5, wherein the accumulator assembly comprises an accumulator cylinder with a closed top and an open lower end, the lower port of the accumulator cylinder is rotatably connected with an accumulator screw, a through screw center hole is arranged along the axis of the accumulator screw, an accumulator piston matched with the inner wall of the accumulator cylinder is arranged above the accumulator screw, and an accumulator spring is supported between the top surface of the accumulator piston and the top wall of the accumulator cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811207390.4A CN109138888B (en) | 2018-10-17 | 2018-10-17 | Hydraulic low frequency impactor for oil drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811207390.4A CN109138888B (en) | 2018-10-17 | 2018-10-17 | Hydraulic low frequency impactor for oil drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109138888A CN109138888A (en) | 2019-01-04 |
| CN109138888B true CN109138888B (en) | 2025-03-18 |
Family
ID=64812250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811207390.4A Active CN109138888B (en) | 2018-10-17 | 2018-10-17 | Hydraulic low frequency impactor for oil drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109138888B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85202387U (en) * | 1985-06-07 | 1986-04-02 | 地质矿产部石油钻井研究所 | Double-acting hydraulic impactor for oil drilling |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2548404C (en) * | 2003-12-19 | 2012-03-13 | Clark Equipment Company | Impact tool |
| CN101666207B (en) * | 2009-09-15 | 2011-09-28 | 刘国经 | Energy accumulation type hydraulic hole drilling hammer |
| CN202578605U (en) * | 2012-04-23 | 2012-12-05 | 吉林大学 | Striking-while-drilling jar knocker |
| CN205135400U (en) * | 2015-10-29 | 2016-04-06 | 中国石油大学(北京) | Impacter but prospecting borehole recovery type high frequency surges |
| CN106437592B (en) * | 2016-10-10 | 2018-12-25 | 中石化石油工程技术服务有限公司 | The release device and releasing method of downhole instrument string |
| CN107165573B (en) * | 2017-06-15 | 2019-08-13 | 核工业北京地质研究院 | The interlocking-type hammer valve system of hydraulic impacter working performance can be improved |
| CN108643824B (en) * | 2018-04-17 | 2020-01-03 | 王勇 | Hydraulic vibration-damping impact drilling tool |
| CN208870563U (en) * | 2018-10-17 | 2019-05-17 | 中国石油化工股份有限公司 | Oil drilling waterpower low frequency impact device |
-
2018
- 2018-10-17 CN CN201811207390.4A patent/CN109138888B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85202387U (en) * | 1985-06-07 | 1986-04-02 | 地质矿产部石油钻井研究所 | Double-acting hydraulic impactor for oil drilling |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109138888A (en) | 2019-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9115541B2 (en) | Impulse-type underground supercharged jet drilling method and device | |
| KR101011433B1 (en) | Drill assembly with backhead and backhead | |
| CN108868680B (en) | Continuous jar | |
| US10113381B2 (en) | Downhole amplification tool | |
| CN107524419B (en) | Hydraulic jar | |
| KR101751409B1 (en) | Hitting body for hydraulic percussion apparatus | |
| CN104533331A (en) | Method and device for achieving shock through circulating drilling fluid | |
| CN104329019A (en) | High-frequency drilling impactor | |
| CN201031614Y (en) | Hydraulic impacter for well drilling | |
| US8783353B2 (en) | Increased energy impact tool | |
| CN102155177B (en) | Wire-line core drilling hydraulic impactor | |
| CN104499978B (en) | A kind of disc spring two-way shock accelerator and its accelerated method | |
| CN109138888B (en) | Hydraulic low frequency impactor for oil drilling | |
| CN114352188B (en) | Slide valve type valve control mechanism capable of improving working performance of hydraulic impactor | |
| CN204782895U (en) | Horizontal well unfreezing jar accelerator | |
| CN105756597B (en) | A kind of bumper jar | |
| CN208870563U (en) | Oil drilling waterpower low frequency impact device | |
| CN108397150A (en) | A kind of connecting pipes impactor | |
| CN112593884B (en) | Underground continuous downward jarring unclamping device and method | |
| CN214170487U (en) | Underground continuous downward jarring stuck releasing device | |
| EP0640170B1 (en) | Improved drilling arrangement | |
| CN211924450U (en) | Elastic block type quick plunger capable of switching working modes | |
| CN204266906U (en) | A kind of high frequency drilling well impactor | |
| CN113107408B (en) | Jar knocker | |
| CN210829062U (en) | Anvil valve type hydraulic down-the-hole hammer capable of improving energy utilization rate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |