US2917025A - Pneumatic drill hammer - Google Patents

Pneumatic drill hammer Download PDF

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US2917025A
US2917025A US739524A US73952458A US2917025A US 2917025 A US2917025 A US 2917025A US 739524 A US739524 A US 739524A US 73952458 A US73952458 A US 73952458A US 2917025 A US2917025 A US 2917025A
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sleeve
valve
valve element
hammer
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Richard O Dulaney
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    • 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

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  • This invention relates to Well drilling implements, and ⁇ more particularly to a rotary drill hammer implement of the pneumatic type adapted to dig by a combination of rotary scraping and pounding action.
  • a main object of the invention is to provide a novel( and improved rotary drill hammer for use in well drill- Further objects and advantages of the invention will be ⁇ come apparent from the following description and claims, and from the accompanying drawings, wherein:
  • Figure l is a vertical cross sectional view taken through a rotary drill hammer constructed in accordance with the present invention, shown with the parts thereof arranged to elevate the hammer element at the beginning of the cycle of movement of said hammer element during operation of the drilling implement.
  • Figure 2 is a fragmentary vertical cross sectional view of the device shown in Figure 1 with the parts in the positions assumed thereby when the casing is lifted to rotate the drill tool.
  • Figure 3 is a top plan view ofthe well drilling implement of Figures l and 2.
  • Figure 4 is a horizontal cross sectional view taken substantially on the line 4-4 of Figure 1.
  • Figure 5 is a horizontal cross sectional view taken substantially on the line 5--5 of Figure 2.
  • the well drilling implement is designated generally at 11 and comprises a vertical, generally cylindrical main casing 12. Threadedly engaged in and thus secured to the lower end of main casing 12 is a bearing sleeve member 13 which is generally cylindrical in shape and which contains a tool supporting tube 14 which extends slidably through said bearing sleeve 13 and which is thus guided for axial movement.
  • the tube 14 has the externally threaded bottom end 15, and threadedly engaged thereon is a tubular tool support 16, said tool support having the reduced top portion 17 which is slidably receivable in an annular recess 18 defined between the reduced bottom wall portion 19 of bearing sleeve 13 and the lower end of the tube 14.
  • the tube 14 is square in transverse cross sectional shape and is slidably but non-rotatably received in a square bore 20 provided in the bearing sleeve 13. This allows torque to be transmitted from the casing 12 to the tubular tool support 16, but allows said tool support 16 to be extended somewhat relative to the casing, for example, as shown in Figure 2.
  • the supporting tube 14 is formed with the externally threaded, reduced top portion 21, and threadedly secured thereon is an annular head member 22 which is sealingly and slidingly engageable with the inside surface of the may be rotated by torque exerted on the casing 12 be-l ICC main casing 12.
  • the head member 22 is formed with a plurality of downwardly and outwardly inclined liuid passages 23 extending from its top surface to its bottom surface.
  • the lower portion of the main. casing 12 is formed with a plurality of exhaust ports 24 located above and immediately adjacent to the top surface of the bearing sleeve 13.
  • the head member 22 is formed with a conical valve seat 25 containing the top ends of the passages 23.
  • an annular head member 2,6 Threadedly secured in the top end of the main casing 12 is an annular head member 2,6 formed with a reduced externally threaded supporting portion 27 for attachment to a supporting pipe section.
  • Designated at 28 is a tubular stem member which is threadedly secured in the head member 26 and which is sealed relative thereto by an annular gasket 29 of resilient deformable material disposed in a sealing recess provided in head member 26 below the external threads 30 on the stem member 28.
  • the stem member 28 extends slidably and sealingly into the top end of the supporting tube 14.
  • Designated at 31 is a sleeve valve element which is slidably engaged on the stern member 28, said sleeve valve element being provided with an enlarged bottom end portion 32 formed With a conical valve face 33 sealingly engageable in the conical valve seat 25 to close off the passages 23, as illustrated in Figure 1.
  • the annular top head member 26 is formed with a plurality of upwardly and outwardly inclined passages 34 which open at a conical valve seat 35 formed in the bottom surface of the head member 26, said passages 34 serving at times to exhaust the top space beneath the head member 26 to the atmosphere.
  • a conical valve seat 35 formed in the bottom surface of the head member 26, said passages 34 serving at times to exhaust the top space beneath the head member 26 to the atmosphere.
  • Secured on the top end of the sleeve valve element 31 is an enlarged head member 36 formed with a conical valve element 37 at its top end which is sealingly engageable at times with the valve seat 35, as shown in Figure 2, whereby to close olf .th exhaust passages 34.
  • the lower portion of the tubular stem 28 is formed with a pair of diametrically opposed slots 37', 37 which are at times registrable with radial passages 38, 38 formed in the bottom enlarged member 32 of the sleeve valve element 31, namely, in the position of the parts shown in Figure l wherein valve element 33 engages Valve seat 25, and also in the elevated position of the valve sleeve member 31, wherein the top valve element 37 engages the valve seat 35.
  • the tubular stem 28 is formed in itsupperl portion with a pair of diametrically opposed passages 39, 39 which are at times registrable with diametrically opposed radial passages 40, 40 formed in the enlarged top member 36. namely, when the valve element 37 is in sealing engagement with the valve seat 35, as shown in Figure 2.
  • Designated at 41 is an annular hammer member which is slidably and sealingly engaged with the inside wall surface of the main casing 12 and which is similarly slidably engaged on the valve sleeve member 31.
  • a bottom coiled spring 42 is provided on the valve sleeve member 31, bearing between an annular shoulder 43 formed thereon and the bottom surface of the hammer member 41.
  • a similar coiled spring 44 surrounds the upper portion of the valve sleeve element 31 bearing between an annular shoulder 45 provided on the top member 36 and the top surface of the hammer member 41.
  • a further coiled spring 47 is disposed between the hammer member 41 and the head member 26, normally biasing the hammer member 41 to the position thereof illustrated in Figure l, namely, to anV intermediate position ou the valve sleeve element 31.
  • a rotary drilling tool is attached to the tubular tool supporting member 16 and cause of the torque-transmitting connection defined ber 2,917,025 .r n f f tween the squared supporting tube 14 and the square inside bore of the member 13.
  • Suitable uid under pressure is pumped down through the stern member 28 and enters the space 48 beneath the hammer member 41 through the registering apertures 37 and 38.
  • the pressure fluid acts von the bottom of the hammer member 41 elevating same and exerting upward force on the valve sleeve member 31 through the'spring 44 and the top shoulder 45 of member 36.
  • the hammer member 41 rises sufficiently to build vup enough force in the spring 44 to suddenly elevate the valve sleeve member 31, driving the top member 36 into sealing position against the valve seat 35 because of the inertia of the hammer member 41, land bringing the passages 39 and 4,0 into registry while lifting the bottom valve element 33 o the valve seat 25.
  • pressure fluid for example, compressed air, water under pressure, or the like.
  • a vertical main casing a bearing sleeve secured to the lower end of said main casing, a tool-supporting tube extending slidably through said bearing sleeve, a tubular tool support secured to the lower end of said supporting tube and being slidable in the lower portion of said bearing sleeve, an annular head member secured to the top end of said supporting tube and being sealingly slidable -in said main casing, said head member being formed with a fluid passage ex- Therefore, while tending from its top surface to its bottom surface, the wall of said main casing being formed with an exhaust port above and adjacent the top surface of said bearing sleeve, said main casing including an annular top head member, a tubular stem member secured to said top head member and extending slidably into the upper portion of said supporting tube, a sleeve valve element slidably engaged on said stem member, a valve seat on the top surface of said bearing sleeve a
  • a well drilling device a vertical main casing, a bearing sleeve secured to the lower end of said main casing, a tool-supporting tube extending slidably Vthrough said bearing sleeve, a tubular tool support secured to the lower end of said supporting tube and being slidable in the lower portion of said bearing sleeve, an annular head member @secured to the top end of said supporting tube and being sealingly slidable in said main casing, said ⁇ head member being formed with a fluid passage extending -from vits top surface to its bottom surface, the wall of said Amain .casing being formed with an ,exhaust port above and adjacent the top surface of said bearing sleeve, said main casing including an annular top head mem-ber, a tubular stem member secured to saidV lastnamed top head member and extending slidably into the upper portion of said supporting tube, a sleeve valve element slidably engaged on said stem member, a valve seat
  • a well drilling device a vertical main casing, a bearing sleeve secured to the lower end of said main casing, a tool-supporting tube extending slidably through said bearing sleeve, a tubular tool support secured to the lower end of said supporting tube and being slidable in the lower portion of said bearing sleeve, an annular head member secured ⁇ to the top end of said supporting tube and being sealingly slidable in said main casing, said head member being formed with a fluid passage extending from its top surface to its bottom surface, the wall of said main casing being formed with an exhaust port above and adjacent the top surface of said bearing sleeve, said main casing including an annular top head member, a tubular stem member secured to said last-named top head member and extending slidably into the upper portion of said supporting tube, a sleeve valve element slidably engaged on said stem member, a valve seat on the top surface of said bearing sleeve, a valve member
  • said secondnamed valve member engages said second-named valve seat
  • said coiled springs being constructed and arranged to bias said sleeve valve element downwardly with said first-named valve member in sealing engagement with said first-named valve seat and to store up sufficient force to cause said sleeve valve element to move suddenly upwardly to unseat the rst-named valve member and cause the second-named valve member to engage said secondnamed valve seat.

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  • 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)
  • Details Of Valves (AREA)

Description

m.. 15, 1959 R. o. DULANEY 2,917,925
PNEUMATIC DRILL HAMMER Filed June s, 195e IN VENTOR Aach/4R0 az yA/EY uit PNEUll/IAHC DRILL HAMMER Richard O. Dnlaney, Fort Worth, Tex. Application June 3, 1958, Serial No. 739,524 3 Claims. (Cl. 121-16) This invention relates to Well drilling implements, and` more particularly to a rotary drill hammer implement of the pneumatic type adapted to dig by a combination of rotary scraping and pounding action.
A main object of the invention is to provide a novel( and improved rotary drill hammer for use in well drill- Further objects and advantages of the invention will be` come apparent from the following description and claims, and from the accompanying drawings, wherein:
Figure l is a vertical cross sectional view taken through a rotary drill hammer constructed in accordance with the present invention, shown with the parts thereof arranged to elevate the hammer element at the beginning of the cycle of movement of said hammer element during operation of the drilling implement.
Figure 2 is a fragmentary vertical cross sectional view of the device shown in Figure 1 with the parts in the positions assumed thereby when the casing is lifted to rotate the drill tool.
Figure 3 is a top plan view ofthe well drilling implement of Figures l and 2. A
Figure 4 is a horizontal cross sectional view taken substantially on the line 4-4 of Figure 1.
Figure 5 is a horizontal cross sectional view taken substantially on the line 5--5 of Figure 2.
Referring to the drawings, the well drilling implement is designated generally at 11 and comprises a vertical, generally cylindrical main casing 12. Threadedly engaged in and thus secured to the lower end of main casing 12 is a bearing sleeve member 13 which is generally cylindrical in shape and which contains a tool supporting tube 14 which extends slidably through said bearing sleeve 13 and which is thus guided for axial movement.
The tube 14 has the externally threaded bottom end 15, and threadedly engaged thereon is a tubular tool support 16, said tool support having the reduced top portion 17 which is slidably receivable in an annular recess 18 defined between the reduced bottom wall portion 19 of bearing sleeve 13 and the lower end of the tube 14.
As shown in Figure 4, the tube 14 is square in transverse cross sectional shape and is slidably but non-rotatably received in a square bore 20 provided in the bearing sleeve 13. This allows torque to be transmitted from the casing 12 to the tubular tool support 16, but allows said tool support 16 to be extended somewhat relative to the casing, for example, as shown in Figure 2.
The supporting tube 14 is formed with the externally threaded, reduced top portion 21, and threadedly secured thereon is an annular head member 22 which is sealingly and slidingly engageable with the inside surface of the may be rotated by torque exerted on the casing 12 be-l ICC main casing 12. The head member 22 is formed with a plurality of downwardly and outwardly inclined liuid passages 23 extending from its top surface to its bottom surface. The lower portion of the main. casing 12 is formed with a plurality of exhaust ports 24 located above and immediately adjacent to the top surface of the bearing sleeve 13. As shown in Figure 2, the head member 22 is formed with a conical valve seat 25 containing the top ends of the passages 23.
Threadedly secured in the top end of the main casing 12 is an annular head member 2,6 formed with a reduced externally threaded supporting portion 27 for attachment to a supporting pipe section. Designated at 28 is a tubular stem member which is threadedly secured in the head member 26 and which is sealed relative thereto by an annular gasket 29 of resilient deformable material disposed in a sealing recess provided in head member 26 below the external threads 30 on the stem member 28. The stem member 28 extends slidably and sealingly into the top end of the supporting tube 14.
Designated at 31 is a sleeve valve element which is slidably engaged on the stern member 28, said sleeve valve element being provided with an enlarged bottom end portion 32 formed With a conical valve face 33 sealingly engageable in the conical valve seat 25 to close off the passages 23, as illustrated in Figure 1.
The annular top head member 26 is formed with a plurality of upwardly and outwardly inclined passages 34 which open at a conical valve seat 35 formed in the bottom surface of the head member 26, said passages 34 serving at times to exhaust the top space beneath the head member 26 to the atmosphere. Secured on the top end of the sleeve valve element 31 is an enlarged head member 36 formed with a conical valve element 37 at its top end which is sealingly engageable at times with the valve seat 35, as shown in Figure 2, whereby to close olf .th exhaust passages 34.
The lower portion of the tubular stem 28 is formed with a pair of diametrically opposed slots 37', 37 which are at times registrable with radial passages 38, 38 formed in the bottom enlarged member 32 of the sleeve valve element 31, namely, in the position of the parts shown in Figure l wherein valve element 33 engages Valve seat 25, and also in the elevated position of the valve sleeve member 31, wherein the top valve element 37 engages the valve seat 35.
The tubular stem 28 is formed in itsupperl portion with a pair of diametrically opposed passages 39, 39 which are at times registrable with diametrically opposed radial passages 40, 40 formed in the enlarged top member 36. namely, when the valve element 37 is in sealing engagement with the valve seat 35, as shown in Figure 2.
Designated at 41 is an annular hammer member which is slidably and sealingly engaged with the inside wall surface of the main casing 12 and which is similarly slidably engaged on the valve sleeve member 31. A bottom coiled spring 42 is provided on the valve sleeve member 31, bearing between an annular shoulder 43 formed thereon and the bottom surface of the hammer member 41. A similar coiled spring 44 surrounds the upper portion of the valve sleeve element 31 bearing between an annular shoulder 45 provided on the top member 36 and the top surface of the hammer member 41. A further coiled spring 47 is disposed between the hammer member 41 and the head member 26, normally biasing the hammer member 41 to the position thereof illustrated in Figure l, namely, to anV intermediate position ou the valve sleeve element 31.
it will be understood that a rotary drilling tool is attached to the tubular tool supporting member 16 and cause of the torque-transmitting connection defined ber 2,917,025 .r n f f tween the squared supporting tube 14 and the square inside bore of the member 13.
Suitable uid under pressure is pumped down through the stern member 28 and enters the space 48 beneath the hammer member 41 through the registering apertures 37 and 38. The pressure fluid acts von the bottom of the hammer member 41 elevating same and exerting upward force on the valve sleeve member 31 through the'spring 44 and the top shoulder 45 of member 36. Eventually the hammer member 41 rises sufficiently to build vup enough force in the spring 44 to suddenly elevate the valve sleeve member 31, driving the top member 36 into sealing position against the valve seat 35 because of the inertia of the hammer member 41, land bringing the passages 39 and 4,0 into registry while lifting the bottom valve element 33 o the valve seat 25. This allows the pressure fluid to be rapidly admitted into the `space above the hammer member 41while at the same time allowing the space 48 below the hammer member to quickly exhaust through passages 23, the space 49 below member 22 and the passages 24. Therefore, the force of the pressure iiuid, combined with that of the tensed springs 44 and 47 suddenly acts on the hammer member 41 to drive same downwardly into engagement with an anvil shoulder Sti provided on the lower portion of the valve sleeve member 31, delivering substantial impact thereto and driving same downwardly into engagement with the member 22, whereby the impact is transmitted to the tube 14 and the tool supporting member 16. The parts are thus restored to the positions thereof shown in Figure l, after which the above described cycle may be repeated.
When the casing 12 is lifted, for example, to rotate the drill tool, the weight of the tool causes the top surface 52 of the member 13 to come into sealing engagement with the bottom surface of the member 22, shutting oif the passages 23 and preventing hammering action at this time. Under these conditions the pressure uid moves the hammer member and the member 36 upwardly to cause the valve member 37 to come into seating engagement with valve seat 35, shutting olf the exhaust passages 34. Also, as will be noted in Figure 2, under these conditions the top passages 39 and 40 are in registry, whereby the pressure iluid is admitted to the spaces both above and below the hammer member 41, so that the hammer member will not be driven downwardly. Al-
though the pressures above and below the hammer member 41 are equal, the pressure area below the hammer member is greater than that above, since it includes the bottom of member 32, and this is suiiicient to hold Valve 37 in sealing engagement with seat 35. the implement is being lifted to rotate the drilling tool, the weight of the tool acts toV stall the `action of the hammer 41, preventing such action until the main casing 12 has been lowered from the position of Figure 2 to the position of Figure l.
As will be readily understood, any desired type of pressure fluid may be employed, for example, compressed air, water under pressure, or the like.
While aspeciiic embodiment of an improved well drilling device of the rotary hammer type has been disclosed in the foregoing description, it will be understood that various modifications within the spirit of the invention may occur to those skilled in the art. Therefore, it is intended that no limitations be placed on the invention except as defined by the scope of the appended claims.
What is claimed is:
l. `In a well drilling device, a vertical main casing, a bearing sleeve secured to the lower end of said main casing, a tool-supporting tube extending slidably through said bearing sleeve, a tubular tool support secured to the lower end of said supporting tube and being slidable in the lower portion of said bearing sleeve, an annular head member secured to the top end of said supporting tube and being sealingly slidable -in said main casing, said head member being formed with a fluid passage ex- Therefore, while tending from its top surface to its bottom surface, the wall of said main casing being formed with an exhaust port above and adjacent the top surface of said bearing sleeve, said main casing including an annular top head member, a tubular stem member secured to said top head member and extending slidably into the upper portion of said supporting tube, a sleeve valve element slidably engaged on said stem member, a valve seat on the top surface of said bearing sleeve a valve member on the bottom end of said sleeve valve element sealingly engageable with said valve seat responsive to downward movement of said sleeve valve element, said last-named annular top head member being formed with an exhaust port opening at its bottom surface, said last-named bottom surface being formed with a valve seat, a valve member on the top end of said sleeve valve element sealingly engageable with said second-named valve seat responsive to upward movement of said sleeve valve element, an annular irnpact member slidably engaged on said sleeve valve element and slidably and `sealingly engaging the inside surface o f said main casing, and means yieldably supporting said impact member on and yieldably transmitting vertical movement of said impact member to said sleeve valve element, said stem member being formed with respective valve apertures below and above said impact member, and said sleeve valve element being formed with apertures at its bottom and top portions aligned respectively with the valve apertures of said `stem member, the aperture of the stem member below .said impact member being constructed and arranged to register at all times with the bottom aperture of the sleeve valve element and the top aperture of the sleeve valve element being constructed and arranged to register with the aperture of the stem member above said impact member when said second-named valve member engages the second-named valve seat, said yieldable supporting means being constructed and arranged to bias said sleeve valve element downwardly with said first-named `valve member in sealing engagement with said first-named valve seat and to store up suii'icient force to cause said sleeve valve element to move suddenly upwardly to unseat the first-named valve member and cause the second-named valve member to engage vrsaid second-named valve seat.
2. ln a well drilling device, a vertical main casing, a bearing sleeve secured to the lower end of said main casing, a tool-supporting tube extending slidably Vthrough said bearing sleeve, a tubular tool support secured to the lower end of said supporting tube and being slidable in the lower portion of said bearing sleeve, an annular head member @secured to the top end of said supporting tube and being sealingly slidable in said main casing, said `head member being formed with a fluid passage extending -from vits top surface to its bottom surface, the wall of said Amain .casing being formed with an ,exhaust port above and adjacent the top surface of said bearing sleeve, said main casing including an annular top head mem-ber, a tubular stem member secured to saidV lastnamed top head member and extending slidably into the upper portion of said supporting tube, a sleeve valve element slidably engaged on said stem member, a valve seat on the top surface of said bearing sleeve, a valve member on the bottom .end of said sleeve valve element sealingly engageable with said valve seat responsive to downward movement of said sleeve valve .elementQsaid lastnamed top head member being formed with an exhaust port opening at its bottom surface, said last-named bottom ,Surface being formed with a valve seat, a valve member on the top end of said sleeve valve element sealingly engageable with said second-named valve seat responsive to upward movement of said sleeve valve element, an annular impact member slidably engaged on said sleeve valve element and slidably and sealingly engaging the inside surface of said main casing, respective coiled springs bearing between the top and bottom portionsof said sleeve valve element and said impact member and resiliently supporting said impact member on the sleeve .'atve element and yieldably transmitting vertical movement of said impact member to said sleeve valve element, said stem member being formed with respective valve apertures below and above said impact member, and said sleeve valve element being formed with apertures at its bottom and top portions, aligned respectively with the valve apertures of said stem member, the aperture of the stem member below said impact member being constructed and arranged to register at all times with the bottom aperture of the sleeve valve element and the top aperture of the sleeve valve element being constructed and arranged to register with the aperture of the stem member above said impact member when said secondnamed valve member engages said second-named valve seat, said coiled springs being constructed and arranged to bias said sleeve valve element downwardly with said rst-named valve member in sealing engagement with said irst-named valve seat and to store up sucient force to cause said sleeve valve element to move suddenly upwardly to unseat the rst-named valve member and cause the second-named valve member to engage said secondnamed valve seat.
3. ln a well drilling device, a vertical main casing, a bearing sleeve secured to the lower end of said main casing, a tool-supporting tube extending slidably through said bearing sleeve, a tubular tool support secured to the lower end of said supporting tube and being slidable in the lower portion of said bearing sleeve, an annular head member secured `to the top end of said supporting tube and being sealingly slidable in said main casing, said head member being formed with a fluid passage extending from its top surface to its bottom surface, the wall of said main casing being formed with an exhaust port above and adjacent the top surface of said bearing sleeve, said main casing including an annular top head member, a tubular stem member secured to said last-named top head member and extending slidably into the upper portion of said supporting tube, a sleeve valve element slidably engaged on said stem member, a valve seat on the top surface of said bearing sleeve, a valve member on the bottom end of said sleeve valve element sealingly engageable with said valve seat responsive to downward movement of said sleeve valve element, said last-named top head member being formed with an exhaust port opening at its bottom surface, said last-named bottom surface being formed with a valve seat a valve member on the top end of said sleeve valve element sealingly engageable with said second-named valve seat responsive to upward movement of said sleeve valve element, an annular impact member slidably engaged on said sleeve valve element and slidably and sealingly engaging the inside surface of said main casin-g, said sleeve valve element being formed with annular bearing shoulders at its top and bottom ends, respective coiled springs on said sleeve valve element bearing between said bearing shoulders and the top and bottom surfaces of said impact member and resiliently supporting said impact member on the sleeve valve element and yieldably transmitting vertical movement of said impact member to said sleeve valve element, said stem member being formed with respective valve apertures below and above said impact member, and said sleeve valve element being formed with apertures at its bottom and top portions aligned respectively with the valve apertures of said stem member, the aperture of the stem member below said impact member being constructed and arranged to register at all times with the bottom aperture of the sleeve valve element and the top aperture of the sleeve valve element being constructed and arranged to register with the aperture of the stem member above said impact member when. said secondnamed valve member engages said second-named valve seat, said coiled springs being constructed and arranged to bias said sleeve valve element downwardly with said first-named valve member in sealing engagement with said first-named valve seat and to store up sufficient force to cause said sleeve valve element to move suddenly upwardly to unseat the rst-named valve member and cause the second-named valve member to engage said secondnamed valve seat.
References Cited in the le of this patent UNITED STATES PATENTS 2,673,713 Ringler Mar. 30, 1954 2,800,884 Mori July 30, 1957 2,813,516 Dulaney Nov. 19, 1957 2,837,317 Hulshizer June 3, 1958 2,851,251 Mori Sept. 9, 1958 2,887,989 Dulaney May 26, 1959
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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2998085A (en) * 1960-06-14 1961-08-29 Richard O Dulaney Rotary hammer drill bit
US3050033A (en) * 1959-10-06 1962-08-21 Paul P Carey Percussion mechanism and rotary drilling apparatus
US3051134A (en) * 1960-03-28 1962-08-28 Ingersoll Rand Co Pressure fluid operated drill motor
US3101796A (en) * 1960-11-14 1963-08-27 Pan American Petroleum Corp Fluid-driven percussion motor
US3105559A (en) * 1960-09-19 1963-10-01 Mission Mfg Co Percussion tool
US3453657A (en) * 1967-04-17 1969-07-01 Maston C Bolton Fluid actuated percussion tool
US3602317A (en) * 1969-10-30 1971-08-31 Drilling Well Control Inc Drill bit percussor apparatus
US3792738A (en) * 1971-03-27 1974-02-19 Yutani Juko Kk Hydraulic breaker
US3924690A (en) * 1973-01-09 1975-12-09 Halifax Tool Co Ltd Percussion drill control means
US3944003A (en) * 1972-04-24 1976-03-16 Bakerdrill, Inc. Bore hole air hammer
US3963038A (en) * 1974-08-15 1976-06-15 Jensen Raymond W Liquid proportioning pump
US4106571A (en) * 1976-12-06 1978-08-15 Reed Tool Co. Pneumatic impact drilling tool
US4601350A (en) * 1983-05-14 1986-07-22 Toshio Mikiya Electrically-operated multi-needle chisel tool
US4694911A (en) * 1984-07-13 1987-09-22 Kennedy James D Drilling assembly for percussion drilling of deep wells
US5070769A (en) * 1987-09-09 1991-12-10 Max Fehr Pneumatic linear vibrator
US5647445A (en) * 1995-11-22 1997-07-15 National Research Council Of Canada Double piston in-the-hole hydraulic hammer drill
US6047778A (en) * 1996-09-30 2000-04-11 Dresser-Rand Company Percussion drill assembly
US20100200301A1 (en) * 2009-02-11 2010-08-12 Lyon Leland H Down hole hammer having elevated exhaust
US20110088953A1 (en) * 2008-08-06 2011-04-21 Atlas Copco Secoroc Llc Percussion assisted rotary earth bit and method of operating the same

Citations (6)

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Publication number Priority date Publication date Assignee Title
US2673713A (en) * 1949-08-18 1954-03-30 Ringler Maurycy Hydraulic well boring arrangement for rotary jumper method of boring
US2800884A (en) * 1956-02-24 1957-07-30 Gulf Research Development Co Positive displacement-type hammer drill
US2813516A (en) * 1955-04-22 1957-11-19 Richard O Dulaney Pneumatic rotary drill hammer
US2837317A (en) * 1957-02-15 1958-06-03 Ingersoll Rand Co Hole cleaning device
US2851251A (en) * 1954-04-27 1958-09-09 Gulf Research Development Co Hammer drill
US2887989A (en) * 1958-07-03 1959-05-26 Richard O Dulaney Pneumatic rotary drill hammer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2673713A (en) * 1949-08-18 1954-03-30 Ringler Maurycy Hydraulic well boring arrangement for rotary jumper method of boring
US2851251A (en) * 1954-04-27 1958-09-09 Gulf Research Development Co Hammer drill
US2813516A (en) * 1955-04-22 1957-11-19 Richard O Dulaney Pneumatic rotary drill hammer
US2800884A (en) * 1956-02-24 1957-07-30 Gulf Research Development Co Positive displacement-type hammer drill
US2837317A (en) * 1957-02-15 1958-06-03 Ingersoll Rand Co Hole cleaning device
US2887989A (en) * 1958-07-03 1959-05-26 Richard O Dulaney Pneumatic rotary drill hammer

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3050033A (en) * 1959-10-06 1962-08-21 Paul P Carey Percussion mechanism and rotary drilling apparatus
US3051134A (en) * 1960-03-28 1962-08-28 Ingersoll Rand Co Pressure fluid operated drill motor
US2998085A (en) * 1960-06-14 1961-08-29 Richard O Dulaney Rotary hammer drill bit
US3105559A (en) * 1960-09-19 1963-10-01 Mission Mfg Co Percussion tool
US3101796A (en) * 1960-11-14 1963-08-27 Pan American Petroleum Corp Fluid-driven percussion motor
US3453657A (en) * 1967-04-17 1969-07-01 Maston C Bolton Fluid actuated percussion tool
US3602317A (en) * 1969-10-30 1971-08-31 Drilling Well Control Inc Drill bit percussor apparatus
US3792738A (en) * 1971-03-27 1974-02-19 Yutani Juko Kk Hydraulic breaker
US3944003A (en) * 1972-04-24 1976-03-16 Bakerdrill, Inc. Bore hole air hammer
US3924690A (en) * 1973-01-09 1975-12-09 Halifax Tool Co Ltd Percussion drill control means
US3963038A (en) * 1974-08-15 1976-06-15 Jensen Raymond W Liquid proportioning pump
US4106571A (en) * 1976-12-06 1978-08-15 Reed Tool Co. Pneumatic impact drilling tool
US4601350A (en) * 1983-05-14 1986-07-22 Toshio Mikiya Electrically-operated multi-needle chisel tool
US4694911A (en) * 1984-07-13 1987-09-22 Kennedy James D Drilling assembly for percussion drilling of deep wells
US5070769A (en) * 1987-09-09 1991-12-10 Max Fehr Pneumatic linear vibrator
US5647445A (en) * 1995-11-22 1997-07-15 National Research Council Of Canada Double piston in-the-hole hydraulic hammer drill
US6047778A (en) * 1996-09-30 2000-04-11 Dresser-Rand Company Percussion drill assembly
US20110088953A1 (en) * 2008-08-06 2011-04-21 Atlas Copco Secoroc Llc Percussion assisted rotary earth bit and method of operating the same
US8763728B2 (en) * 2008-08-06 2014-07-01 Atlas Copco Secoroc, LLC Percussion assisted rotary earth bit and method of operating the same
US20100200301A1 (en) * 2009-02-11 2010-08-12 Lyon Leland H Down hole hammer having elevated exhaust
US8011455B2 (en) * 2009-02-11 2011-09-06 Atlas Copco Secoroc Llc Down hole hammer having elevated exhaust
US8141663B2 (en) 2009-02-11 2012-03-27 Atlas Copco Secoroc Llc Down hole hammer having elevated exhaust

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