US3848681A - Immersion hydropercussive device - Google Patents
Immersion hydropercussive device Download PDFInfo
- Publication number
- US3848681A US3848681A US00340035A US34003573A US3848681A US 3848681 A US3848681 A US 3848681A US 00340035 A US00340035 A US 00340035A US 34003573 A US34003573 A US 34003573A US 3848681 A US3848681 A US 3848681A
- Authority
- US
- United States
- Prior art keywords
- cavity
- piston
- hollow rod
- percussive
- rod
- 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.)
- Expired - Lifetime
Links
- 238000007654 immersion Methods 0.000 title claims abstract description 22
- 239000012530 fluid Substances 0.000 claims abstract description 37
- 238000009527 percussion Methods 0.000 claims abstract description 26
- 230000003993 interaction Effects 0.000 claims description 10
- 230000035939 shock Effects 0.000 claims description 3
- 230000001133 acceleration Effects 0.000 abstract description 8
- 239000011435 rock Substances 0.000 abstract description 8
- 239000011797 cavity material Substances 0.000 description 88
- 238000005553 drilling Methods 0.000 description 9
- 230000002706 hydrostatic effect Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
Definitions
- ABSTRACT An immersion hydropercussive device in which a movable housing is rigidly connected to a percussive mass whose bottom face rigidly mounts a bit, a hollow rod located in the housing, the interior of the rod communicating with an acceleration cavity in the percussive mass and with a source of high-pressure fluid, and a piston, mounted on the rod.
- the piston is capable of moving along the rod between the two stops fastened to the rod, and divides the housing into two cavities.
- the piston is provided with ports to interconnect these cavities while the percussive mass is being accelerated.
- a stop which interacts with the end of the piston as soon as the percussive mass has been cocked
- a liner capable of inertial movement along the walls of the cavity, with the end surface of the liner interacting with the piston following the percussion of the bit together with its rigidly associated masses (the percussive mass and housing) against the rock.
- the invention relates to drilling equipment, and more particularly to immersion hydropercussive devices used for drilling wells in average and high-strength rocks.
- an immersion hydropercussive device comprising a movable housing and a percussive mass slidably connected therewith.
- Located in the housing is a hollow rod whose interior is connected to the source of highly pressurized fluid.
- a piston is installed on the rod, forming therebetween a cavity communicating with the interior of the rod.
- the piston of the known device blocks the ports communicating the interior of the rod with the cavity formed between the rod and the piston.
- a hydraulic impact takes place in the acceleration cavity located over the housing, thereby initiating the acceleration of the housing the latter accumulating kinetic energy and transmitting it to the rock, although not directly but via an intermediate collision with another body, which in the present case is the percussive mass, carrying the bit.
- the housing imparts a movement to the percussive mass, thus bringing about an impact against the rock.
- An object of the invention is to provide an immersion hydropercussive device which makes it possible to develop a large energy of percussion (hundreds of times exceeding that in the existing device) while using the hydrostatic operation of fluid to accelerate the percussive mass and thereby extend many times the service life of the bit.
- a further object of the invention is to provide an immersion device having a high efficiency factor, which is the ratio of the kinetic energy of the strikes carrying the bit to the hydrostatic energy of the fluid consumed within one impact cycle.
- Still a further object of the invention is to provide an immersion hydropercussive device which makes it posa piston installed on the rod so that a cavity is formed therebetween, with this cavity being connected to the interior of the rod, according to the invention the movable housing is rigidly connected to the percussive mass, the piston, being able to move along the axis of the rod, is installed between the two stops fastened to the rod, dividing the housing into two cavities, the first one facing the percussive mass and the second onc, and is equipped with ports for connecting these cavities while accelerating the percussive mass, the first cavity having a stop which interacts with the end surface of the piston on completing the cocking of the percussive mass, and the second cavity having a-Vco-axially .arranged linercapable of sliding along the walls of the cavity whose end surface following the percussion interacts with the piston.
- a damping liner which should be constructed in the form of two coaxially arranged hollow cylinders fastened to each other at the bottom of the housing, with the outer cylinder being a little longer than the inner cylinder.
- stop fastened to the rod facing the first cavity should be constructed so as to be able to absorb shocks.
- the present device allows for developing a power .of percussion being equal to 10 tm at a high frequency-of percussions reaching 3 percussions per second, and is characterized by a much smaller capacity and a high efficiency of about 50 per cent as compared to the drilling rigs utilized at present.
- the large power of percussion developed by the'present immersion hydropercussive device allows for drilling wells even with a heavily blunted working tool fastened to the end of the percussive mass and brought in contact with the rock, thereby increasing considerably the speed of drilling since there is no need to change frequently the working tool which requires the laborconsuming operation of lifting and sinking the drilling string.
- FIGURE is a longitudinal cross-section of an immersion hydropercussive device, according to the invention.
- the immersion hydropercussive device shown in the drawing comprises a housing 1 constructed in the form of a hollow cylinder, and a percussive mass 2 rigidly connected to the housing 1 and representing a massive body, e.g. being fabricated from carbon steel weighing about 1.5 t.
- Means (not shown in the drawing) for fixing a bit are provided on the end working surface of the percussive mass 2.
- Installed in the housing 1 is a hollow rod 3 whose interior 4 is communicated at one side with a hydroaccumulator 5, and at the other side with an acceleration cavity formed in the percussive mass 2.
- Rigidly fastened to the rod 3 are stops 7 and 8, with a piston 9 being able to move along the axis of the rod 3 installed therebetween.
- the piston 9 divides the inner space of the housing 1 into two cavities, namely a first cavity 10 located adjacent to the percussive mass 2 and a second cavity 11.
- a circular cavity 12 communicates with the interior 4 of the rod 3 through ports 13 formed between the piston 9 and the rod 3.
- ports 14 which communicate periodically the interior 4 of the rod 3 with the cavity 11 of the housing 1.
- Ports 15 are formed in the piston 9 to interconnect the cavities l0 and 11.
- the shape of the stops 8 is such that while installing the piston 9 thereon, the ports 15 in the piston are closed.
- Installed in the cavity 10 is a stop constructed in the form of a thrust pipe 16 rigidly connected to the percussive mass 2.
- the cavity 10 is communicated with the surrounding'medium through channels 17 formed in the percussive mass 2.
- a liner 18 capable of moving axially is installed in the cavity 11, with the liner 18 being constructed in the form of two axially arranged hollow cylinders 19 and 20 interconnected, for example, by welding at the bottom of the housing 1, with the-outer cylinder 20 being a little longer than the inner cylinder 19.
- Such a construction of the liner 18 is aimed at damping the on collision impact between the liner l8 and the end surface of the piston 9 due to a longitudinal travelling wave generated in the liner.
- the stop 8 is constructed as a damper which may consist of a set of washers having a larger thickness in the central portion than on the periphery.
- the working fluid is pumped into the hydroaccumulator 5 by a pumping station (not shown in'the drawing) at a pressure of l00-200 atm.
- hydroaccumulator 5 use can be made of any known hydroaccumulator in which gas is employed as an elastic element, with the product of the maneuverable volume of the hydroaccumulatorby the working pressure in. the high-pressure manifold exceeding onehalf of the percussion power.
- a drilling string can be employed as a hydroaccumulator, making use of the elastic properties of waterfand the. walls of the drilling string.
- the immersion hydropercussive device operates in the following manner:
- the hydropercussive mechanism is shown at the instance of the percussive mass being braked by soil, when the liner 18 has separated from the bottom of the housing 1 and runs inertially towards the piston 9 to press it against the lower stop 8 and thus arrest communication between the cavities l0 and 11.
- the pressure of the fluid increases in the cavity 11 entailing the movement of the housing 1 together with the percussive mass 2 upwardly, thereby accomplishing the cocking of the percussive mass 2.
- the fluid contained in the cavity 10 of the housing 1 is released into the well through channels 17 in the percussive mass 2.
- the thrust pipe 16 rigidly connected to the. percussive mass 2 moves together with the housing 1.
- the thrust pipe 16 touches the end surface of the piston 9, somewhat displacing it, with the ports 13 and 15 being opened, thereby moving abruptly the piston 9 to the stop 7.
- the fluid proceeds through the ports 13 to the circular cavity 12, thereby retaining the piston 9 on the stop 7 while accelerating the percussive mass 2 together with the bit rigidly secured thereon.
- the fluid flows from the cavity 11 through the ports 15 to the cavity 10 equalizing the-pressure in the cavities l0 and 11, and the percussive mass 2 is accelerated downwardly under the effect of its own weight and the pressure of the working fluid in the cavity 6 delivering a percussion on the rock.
- the liner l8 encountering no obstacles, falls down hitting the end surface of the piston 9 which is thrown to the initial position. Then the cycle is repeated.
- the device operates in the inclined or horizontal positions practically in the same way as in the vertical position, except for the cocking of the mass 2 which, in this case, is accomplished by a somewhat lower effort in connection with partial or complete absence of the constituent of the effort from the weight of the mass 2.
- An immersion hydropercussive device comprising a movable housing, a percussive mass rigidly connected to said movable housing, a source of high-pressure fluid, a hollow rod located in said movable housing, a cavity in said percussive mass, the interior of said hollow rod at one end communicating with said source of high-pressure fluid, and at the other end with said cavity in the percussive means, two stops rigidly fastened to the hollow rod, a piston mounted on said hollow rod with a provision for movement along the axis of the latter between the two said stops, a circular cavity formed between said piston and said hollow rod, ports in said hollow rod for communicating said circular cavity with the interior of the rod while accelerating said percussive mass, said piston dividing said movable housing in two cavities, a first cavity located adjacent said percusteraction between the end surface of the liner and said piston following the percussion of said percussive mass, and a hydroaccumulator installed between the said source of high-pressure fluid and the interior of the rod
- the immersion hydropercussive device comprising a movable housing, a percussive mass rigidly connected to said movable housing, a source of high-pressure fluid, a hollow rod located in said movable housing, a cavity in said percussive mass, the interior of said hollow rod at one end communicating with said source of high-pressure fluid, and at the other end with said cavity in the percussive means, two stops rigidly fastened to the hollow rod, a piston mounted on said hollow rod with a provision for movement along the axis of the latter between the two said stops, a circular cavity formed between said piston and said hollow rod, ports in said hollow rod for communicating said circular cavity with the interior of the rod while accelerating said percussive mass, said piston dividing said movable housing in two cavities, a first cavity located adjacent said percussive mass and a second cavity, ports formed in said piston for connecting said first and second cavities while accelerating said percussive mass, other ports in said hollow rod for communicating said second cavity with said cavity of
- An immersion hydropercussive device comprising a movable housing, a percussive mass rigidly connected to said movable housing, a source of high-pressure fluid, a hollow rod located in said movable housing, a cavity in said percussive mass, the interior of said hollow rod at one end communicating with said source of high-pressure fluid, and at the other end with said cavity in the percussive mass, two stops rigidly.
- a piston mounted on said hollow rod with a provision for movement along the axis of the latter between the two said stops, a circular cavity formed be- .tween said piston and said hollow rod, ports in said hollow rod for communicating said circular cavity with the interior of the rod while accelerating said percussive mass, said piston dividing said movable housing in two cavities, a first cavity located adjacent said percussive means and a second cavity, ports formed in said piston for connecting said first and second cavities while accelerating said percussive mass, other ports in said hollow rod for communicating said second cavity with said cavity of said interior of the rod while cocking said per cussive mass, another stop formed in said first cavity for interaction with the end surface of said piston upon completion of cocking said percussive mass, a liner installed co-axially in said second cavity provisioned for moving along the walls of this cavity for interaction between the end surface of the liner and said piston following the percussion of 'said percussive mass, and said stop
- An immersion hydropercussive device comprising a movable housing; a percussive mass rigidly connected to said movable housing, a source of high-pressure fluid; a hollow rod located in said movable housing, a cavity in said percussive mass, the interior of said hollow rod at one end communicating with said source of high-pressure fluid, and at the other end with said cav ity in the percussive mass, a piston mounted on said hollow rod with a provision for movement along the axis of the rod, a circular cavity formed between said piston and said hollow rod, said hollow rod having ports communicating said circular cavity with the interior of said rod, said piston dividing said movable housing into two cavities, a first cavity being located adjacent said percussive mass, and a second cavity, a stop rigidly secured on said hollow rod in said first cavity which restricts the movement of said piston in one direction, a stop rigidly secured on said hollow rod in said second cavity which restricts the movement of said piston in the opposite direction, said piston port communicating said first and
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Percussive Tools And Related Accessories (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU7201755841A SU479390A1 (ru) | 1972-03-10 | 1972-03-10 | Погружное гидроударное устройство |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3848681A true US3848681A (en) | 1974-11-19 |
Family
ID=20505505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00340035A Expired - Lifetime US3848681A (en) | 1972-03-10 | 1973-03-12 | Immersion hydropercussive device |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3848681A (de) |
| CA (1) | CA978053A (de) |
| DD (1) | DD102768A1 (de) |
| DE (1) | DE2311008C3 (de) |
| FR (1) | FR2175867B1 (de) |
| GB (1) | GB1402082A (de) |
| SU (1) | SU479390A1 (de) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2756966A (en) * | 1954-07-23 | 1956-07-31 | Bassinger Ross | Fluid actuated impact tool |
| US3744576A (en) * | 1971-02-03 | 1973-07-10 | B Sudnishnikov | Reversible percussion device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE277428C (de) * | ||||
| DE137430C (de) * | ||||
| US2108946A (en) * | 1933-09-23 | 1938-02-22 | Seifer Theo | Hydraulic boring mechanism |
-
1972
- 1972-03-10 SU SU7201755841A patent/SU479390A1/ru active
-
1973
- 1973-03-06 DE DE2311008A patent/DE2311008C3/de not_active Expired
- 1973-03-09 CA CA165,766A patent/CA978053A/en not_active Expired
- 1973-03-09 DD DD169339A patent/DD102768A1/xx unknown
- 1973-03-09 FR FR7308556A patent/FR2175867B1/fr not_active Expired
- 1973-03-09 GB GB1150573A patent/GB1402082A/en not_active Expired
- 1973-03-12 US US00340035A patent/US3848681A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2756966A (en) * | 1954-07-23 | 1956-07-31 | Bassinger Ross | Fluid actuated impact tool |
| US3744576A (en) * | 1971-02-03 | 1973-07-10 | B Sudnishnikov | Reversible percussion device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1402082A (en) | 1975-08-06 |
| DE2311008A1 (de) | 1973-10-31 |
| FR2175867A1 (de) | 1973-10-26 |
| DD102768A1 (de) | 1973-12-20 |
| DE2311008C3 (de) | 1975-09-25 |
| CA978053A (en) | 1975-11-18 |
| DE2311008B2 (de) | 1975-02-13 |
| SU479390A1 (ru) | 1977-11-25 |
| FR2175867B1 (de) | 1976-11-05 |
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