WO2017123736A2 - Appareil de forage de puits peu profond - Google Patents

Appareil de forage de puits peu profond Download PDF

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Publication number
WO2017123736A2
WO2017123736A2 PCT/US2017/013161 US2017013161W WO2017123736A2 WO 2017123736 A2 WO2017123736 A2 WO 2017123736A2 US 2017013161 W US2017013161 W US 2017013161W WO 2017123736 A2 WO2017123736 A2 WO 2017123736A2
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WO
WIPO (PCT)
Prior art keywords
frame
assembly
motor
drill
transmission
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.)
Ceased
Application number
PCT/US2017/013161
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English (en)
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WO2017123736A3 (fr
Inventor
Harold E. Patterson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Northeast Texas Disaster Response Inc
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Northeast Texas Disaster Response Inc
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Filing date
Publication date
Application filed by Northeast Texas Disaster Response Inc filed Critical Northeast Texas Disaster Response Inc
Publication of WO2017123736A2 publication Critical patent/WO2017123736A2/fr
Publication of WO2017123736A3 publication Critical patent/WO2017123736A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
    • E21B7/027—Drills for drilling shallow holes, e.g. for taking soil samples or for drilling postholes

Definitions

  • the example embodiments in general are directed to a well-drilling rig configured in a miniature, lightweight profile for ease of transportation, assembly, and storage, and more particularly to a modular, transportable, shallow well-drilling apparatus adapted to drill wells up to 300 feet in depth so as to reach an underground aquifer.
  • An improved water source may be understood as a source that provides safe drinking water, examples being a piped household water connection, a public standpipe, a borehole, a protected dug well, a protected spring, and rainwater collection.
  • unimproved drinking water sources such as an unprotected dug well, an unprotected spring, surface water (i.e., a river, dam, lake, pond, stream, canal, and/or an irrigation channel), vendor-provided water (e.g., a cart with small tank/drum, tanker truck), and bottled water.
  • FIG. 1 is a photograph taken in 2015 of a spring-fed ditch which also acts as a cistern for collecting rainwater, which serves as a primary source of drinking water for a mountain Indian village in Panama.
  • FIG. 2 is a photograph of the primary source of drinking water for a village in remote Manipur, India; a tanker truck of water. The villagers are permitted to fill up to two (2) containers twice weekly for their families.
  • FIG. 3 is a photograph of another water source taken from the Zambezi River for a village near Livingstone, Zambia. This water source is untreated.
  • FIGS. 4 and 5 are provided to illustrate the components and setup for this drill to conduct shallow well-drilling operations. As shown in FIG.
  • Westmoreland's drill rig 10 generally includes an engine and transmission (generally shown by 11) secured by supporting structure (comprising table legs 16, motor mount 17, and drill mast 18) on a ground surface and configured to power a connected length of drill pipe stems 13 with a drill bit 14 at a terminal end thereof so as to drill a borehole 50 to a depth that breaches an underground aquifer.
  • supporting structure comprising table legs 16, motor mount 17, and drill mast 18
  • a drill bit 14 at a terminal end thereof so as to drill a borehole 50 to a depth that breaches an underground aquifer.
  • FIGS. 4 and 5 a plurality of 55- gallon drums 20 are filled with water and maintained full during the drilling process. These drums 20 are arranged near a suction mud pit 22 and a settling mud pit 24 which are to be dug.
  • an agent such as chlorine is added to each drum 20 of water to ensure that bacteria are not injected into the groundwater during drilling.
  • the suction and settling pits 22, 24 are typically dug about 7-10 feet away from the well guide hole 15 so that, when the well is finished, the resultant pump pad does not need to be built on the unstable filled-in pits 22, 24.
  • These pits 22, 24 collectively should have at least three times the volume of the borehole 50 being drilled, each pit being approximately 2 ft. deep, 2 ft. wide and 3-4 ft. long, with the long axis parallel to the direction of flow.
  • a first channel 25 is dug between the well guide hole 15 and the settling pit 24, and a second return ditch 26 between the two pits 22, 24.
  • a mud pump 30 is then set between the drill rig 10 and the suction mud pit 22.
  • the pump 30 includes a high pressure suction hose 31, and feed hose 33 which ports high pressure drilling fluid 27 from the suction pit 22 down a swivel between the transmission and drill pipe 13, along the drill pipe 13 so as to remove debris associated with drilling operations to form the borehole 50. This debris drains off via channel 25 and ditch 26 into the settling pit 24 and suction pit 22; a drain hose 35 ports excess drilling fluid 27 into the settling pit 24.
  • the drill rig 10 is then erected over the guide hole 15 and leveled on boards 19 (such as 2" x 6" planks), with the hoses 31, 33, 35 over the pits 22, 24, and with table legs 16 arranged parallel to the return ditch 26 between the mud pits 22, 24.
  • Guy ropes 40 are attached between the drill mast 18 and the ground in a triangular fashion and tightened.
  • the drill head is raised up the mast 18 so as to permit ease of starting the LS-100 engine 11 in an idle position. Once running, the drill head is raised additionally to a sufficient height to allow the installation of a drill pipe 13 section with the drill bit 14 secured to an end thereof, and the drilling process may commence.
  • the borehole 50 is drilled by rotating the bit 14 at the end of drill pipe 13. Borehole 50 cuttings are removed by continuous circulation of a drilling fluid 27 from suction pit 22 as the bit 14 penetrates the formation.
  • One end of a drill pipe 13 is connected to the LS-100 engine 11.
  • Drilling fluid 27 is pumped down through the hollow drill pipe 13 using the centrifugal pump (mud pump 30) to the drill bit 14.
  • the fluid 27 flows upward in the annular space between the drill pipe 13 and the borehole 50 to the surface, where it is channeled via channel 25 into the settling pit 24 so that most of the cuttings drop out.
  • Used drilling fluid 27 from the settling pit 24 overflows via ditch 26 into the suction pit 22.
  • Relatively clean drilling fluid 27 from the suction pit 22 is then pumped back through the drill pipe 13 and the cycle repeats. Water is added as necessary to top-up the pits 22, 24.
  • the drilling fluid 27 circulates another 10 minutes to remove as much cuttings as possible from the well.
  • the drill head is raised until a slip clamp on the drill table 16 can be engaged at a coupling of the next length of drill pipe 13 with the mud pump 30 turned off.
  • a larger reamer bit may replace or be added behind the drill bit 14, and the borehole 50 is re-drilled to widen it. While this is being done, the screen interval, length of casing, volume of gravel pack, grout, etc. can be planned, materials cut to size, etc. This is helpful to do since time is of the essence when the drill pipe 13 and bit 14 are pulled from the completed borehole 50 and the screen and casing installed.
  • the drilling fluid 27 is allowed to circulate for another 10 minutes to remove as much cuttings as possible from the well. Then the "mud" is circulated out of the borehole 50 by replacing it with fresh (clean) water. The drill piping 13 and bit 14 are then removed, with the bit 14 rotating and water circulating, so the surface of the borehole 50 remains smooth. The casing, gravel pack, annular seal, cement pad and hand pump can then be installed.
  • FIG. 6 is a perspective view of this prior art well-drilling rig, which is offered online by the Freeman Institute Foundation (http://www.freemaninstitute.com/water.htmnd) and which has been developed by Renouard, et al., as described in U.S. Pat. Appl. Pub. No. 2013/0206480, (hereafter, the "'480 publication”). As shown in FIG.
  • the '480 publication describes a human-powered borehole drill 100, e.g., the "Village Drill", which includes a rotatable wheel 116 supported on a wheel support 114 above a ground surface at a height sufficient to permit a section of drill pipe 128 to be inserted between the ground and the wheel 116.
  • the wheel 116 is composed of a central aperture to facilitate transfer of torque from the wheel 116 to a Kelly bar 146, and includes a hub 160 with spokes 162 extending therefrom.
  • the wheel support 114 includes a base 120 with a vertical columns 122, 124 attached thereto, and a cantilevered beam 126 on the columns 122, 124 for lifting the drill pipe 128.
  • Both ends of the beam 126 have a pulley 142 inside, and a winch 144 is attached to the low end of the beam 126.
  • the wire rope or cable from the winch 144 goes through the beam 126 and can then hook onto the pipe 128 or the Kelly bar 146 for lifting.
  • the Kelly bar 146 In a basic drilling operation to dig the borehole for the well, the Kelly bar 146 is positioned above the wheel 116. As the drill cuts, the Kelly bar 146 and pipe 128 will lower until the top of the Kelly bar 146 is level with the top of the wheel hub 160. Then a winch operator lifts the pipe 128 until the slip plate (not shown) can fit under a coupler (not shown) between sections of pipe 128 and over legs of the base 120. After unthreading the Kelly bar 146 from the drill pipe 128, the Kelly bar 146 is raised until it reaches the top of the cantilever beam 126.
  • a new three-foot pipe section of pipe 128 may be fit between the Kelly bar 146 and the top of the previous section of pipe 128, as is known, and threaded onto the pipe 128 (such as by a pipe wrench) using the coupler, and then onto the Kelly bar 146. Then the pipe 128 is lifted slightly until the slip plate is removed so drilling can continue.
  • the cost of the Village Drill is substantially more than even that of the LS-100, and may have similar problems regarding replacement parts and difficultly in sandy and hard rock layer conditions. As such, those people living in undeveloped areas need another option for building and maintaining the well with ease, utilizing simple but effective well-drilling technologies with minimal cost and ease of replacement parts.
  • An example embodiment of the present invention is directed to a well-drilling apparatus.
  • the apparatus includes The apparatus includes a generally rectangular frame having a plurality of multi-segment support beams in spaced relation extending vertically from a lower base to a top cap, no component of which exceeds five feet in length, a winch assembly attached to the frame, and a motor removably mounted on the frame and slidable up and down the beams via the winch assembly.
  • the apparatus further includes a transmission removably coupled to the motor, and a drill pipe assembly removably coupled to the transmission.
  • Another example embodiment is directed to a well-drilling apparatus having a frame, the weight of which does not exceed 175 pounds, a winch assembly attached to the frame, and a motor removably mounted on the frame and slidable up and down the frame via the winch assembly.
  • the apparatus further includes a transmission removably coupled to the motor, and a drill pipe assembly removably coupled to the transmission.
  • Another example embodiment is directed to a well-drilling apparatus having a frame, a winch assembly attached to the frame, and a motor removably mounted on the frame and slidable up and down the frame via the winch assembly.
  • the apparatus further includes a transmission removably coupled to the motor, and a drill pipe assembly removably coupled to the transmission. The weight of the apparatus does not exceed 650 pounds.
  • FIG. 1 is a photograph of a spring-fed ditch in Panama.
  • FIG. 2 is a photograph of a tanker truck of water in India.
  • FIG. 3 is a photograph of a drinking water source in Zambia.
  • FIG. 4 is a top perspective view of a prior art portable, well-drilling rig.
  • FIG. 5 is a side view of the rig shown in FIG. 4 to illustrate operation thereof.
  • FIG. 6 is a perspective view of another prior art portable, well-drilling rig.
  • FIG. 7 is a perspective view of a portable well - drilling apparatus in accordance with the example embodiments.
  • FIG. 8 is a front plan view of the apparatus shown in FIG. 7.
  • FIG. 9 is a side perspective view of the apparatus shown in FIG. 7.
  • FIG. 10 is an exploded parts view of the apparatus of FIG 7.
  • FIG. 11 is a top plan view of the base shown in the apparatus of FIG. 7.
  • FIG. 12 is a right side elevational view of the base in FIG. 11.
  • FIG. 13 is a top plan view of the outrigger shown in the apparatus of FIG. 7.
  • FIG. 14 is a front plan view of the outrigger in FIG. 13.
  • FIG. 15 is a top plan view of the motor mount shown in the apparatus of FIG. 7.
  • FIG. 16 is a right side elevational view of the motor mount in FIG. 15.
  • FIG. 17 is an enlarged perspective view showing a portion of the apparatus including the motor, motor mount, transmission, and drill swivel.
  • FIG. 18 is a perspective view of the top cap shown in the apparatus of FIG. 7.
  • FIG. 19 is a top plan view of the cap of FIG. 18.
  • FIG. 20 is an elevational view of the drill pipe assembly shown in the apparatus of FIG. 7.
  • FIG. 21 is a photograph illustrating the preparation of the suction/settling pit and leveling of the apparatus prior to drilling operations.
  • FIG. 22 is a photograph illustrating the lifting of the motor assembly using the winch assembly, in preparation for connecting drill pipe.
  • FIG. 23 is a photograph illustrating the removal of the protective cap off the threads of the drill swivel, in preparation for connecting one or more lengths of drill pipe stems.
  • FIG. 24 is a photograph illustrating the complete installation of the apparatus at a drill site, ready to conduct drilling operations to access an underground aquifer.
  • FIG. 25 is a photograph illustrating the working of the rock drill bit to form the pilot borehole.
  • FIG. 26 is a photograph illustrating the deepening of the borehole during drilling operations.
  • FIG. 27 is a photograph illustrating the drainage of the debris and drilling fluid exiting the apparatus into the suction/settling pit during drilling operations.
  • FIG. 28 is a photograph illustrating a completed borehole with the drill bit and stem therein; the well is now ready for casing and tapping.
  • the portable, shallow well-drilling apparatus 200 is comprised of just a few modular, connectable assemblies.
  • apparatus 200 includes a generally rectangular frame 210 composed of a base 211, and a plurality of vertically-oriented, multi-segment support beams 212 connected at one end to the base 211 and at the other ends to a top cap 213.
  • Apparatus 200 further includes a winch assembly 220 attachable to frame 210 and adapted to raise and lower a motor assembly 240 along the support tubes 212, so as to connect a plurality of drill pipe stems 291, one of which terminates in a drill bit 294A/B (FIG. 20).
  • Apparatus 200 further includes a stabilizer assembly 230 which is configured to secure the apparatus 200 to a ground surface at a drill site preparation for drilling operations.
  • a removable motor 248 supported within a motor mount 241 of the motor assembly 240 is removably coupled to a transmission 250, which in turn is connected to a hollow drill pipe swivel 280 that is configured to be operatively connected to the drill pipe assembly 290, namely to a female end/coupling 293 of a 1" OD steel drill pipe stem 291 (FIG. 20).
  • the drill pipe swivel 280 is adapted to be connected to a high pressure feed hose 264 of a pump assembly 260, namely to a mud pump 263.
  • Pump 263 has a high-strength suction house 262 connected thereto which is designed to suck, under pump 263 power, from a water- filled suction/settling pit 261 so as to provide a high- pressure source of drilling fluid to the drill pipe assembly 290 via the swivel 280, as is known.
  • the total weight of the frame 210 alone does not exceed 175 pounds, and the total weight of the apparatus 200 does not exceed 650 pounds. Additionally, as the apparatus 200 is erected from smaller, modular components, such facilitates transport of all components thereof within a single shipping container that does not exceed five (5) feet in length and three (3) feet in width. To achieve this, none of the constituent components of apparatus 200, inclusive of the support beams 212 and pipe stems 291, exceeds five (5) feet in length.
  • apparatus 200 is configured to create at least a 1" diameter borehole 205 up to 300 feet in depth from the ground surface, so as to breach an underground aquifer.
  • apparatus 200 is configured to create a borehole 205 depth in a range of about 50 to 300 feet, so as to reach an underground fresh water source below a lowest depth of groundwater, which as noted above is about 20 feet below ground surface.
  • the frame 210 is extremely robust, as each of the base 211, top cap 213 and support beams 212 are formed of a plurality of welded elongate schedule 40 steel sections having a pipe wall thickness of at least 0.25".
  • the base 211 is composed of a plurality of welded- together truncated square - shape steel tubing sections, whereby tubing sections 214A are 2.5" x 2.5" square steel tubing, and cross-tube section 214B is formed of 2" x 2" square steel tubing.
  • the base 211 further includes three (3) truncated steel support collars 215 (2.375" x 3" steel tubing), each adapted to receive a lower and of a corresponding support beam 212.
  • Each collar 215 includes a hole 216 that aligns with the corresponding hole in the support beam 212, with the beam 212 being secured to the collar 215 via a fastener (not shown) secured therethrough.
  • the support beams 212 are composed of a plurality of connected segments 217 (FIG. 10), none of which exceeds 5' in length.
  • the top cap 213 (see FIGS. 18, 19) includes two (2) 2.5" x 2.5" square steel tubing sections 218A/B welded together in the shape of a T, and further includes pulleys 223 of the winch assembly 220 thereon, with one pulley 223 that takes most of the weight welded to a bracket 226 on tube section 218B.
  • a collar 215 is welded to an end of tube section 218A for coupling to a top end of a support beam 212.
  • the stabilizer assembly 230 includes a plurality of outriggers 231, each outrigger 231 secured at one end to the base 211. As best shown in FIGS. 9, 13 and 14, each outrigger 231 includes an aperture 237 at the other end that is adapted to receive a threaded bottom of a screw jack 234. Each screw jack 234 is inserted through it corresponding aperture 237, and additionally engages a nut 238, with each foot of the screw jack 234 engaging a support pad 233. As each of the screw jacks 234 are adjustable, this allows ease of leveling of the frame 210 on the ground surface at the drilling site.
  • the stabilizer assembly 230 further includes a plurality of rebar elements 232, as shown extending through apertures in the base 211 and into the ground surface. Additionally a pair of comealongs 235 are employed to further stabilize the frame 210. Each comealong 235 has its proximal end connected to the motor mount 241, and a distal end connected to a coiled auger pin 236 that is adapted to be screwed into the ground surface.
  • the motor assembly 240 includes a motor mount 241 supporting a removable motor 248.
  • Motor 248, in an example, may be embodied as a 6.75 HP BRIGGS & STRATTON® 675 SERIES eTM, 190cc engine, with transmission 250 embodied as an Aries 30: 1 ratio transmission.
  • Motor mount 241 comprises a pair of steel plates 242 in spaced relation to one another with a steel hanger 246 extending therebetween, the components welded to one another.
  • the motor mount 241 is configured so that each steel support sleeve 244 thereof is welded to a corresponding bracket 243, which in turn is welded to an outer surface of its corresponding plate 242.
  • a central connector bracket 225 is welded to the hanger 246 and configured to attach to one end of a steel cable 224 of the winch assembly 220 for raising and lowering the motor assembly 240.
  • Pump assembly 260 includes a hi-strength 2" OD suction hose hooked up to the inlet of mud pump 263, and a 1 1 ⁇ 4"high pressure feed hose 264 connected between the pump 263 outlet and a to a hollow connector element 285 that is welded to the drill swivel 280 (FIG. 17).
  • Drill swivel 280 may include a protective cap 282 placed over a threaded portion 281 when not in use/connected to a drill pipe stem 291.
  • the suction hose 262 takes a suck on a water- filled suction/settling pit 261, under pump 263 power, which serves as the drilling fluid ported through connector element 285 and drill swivel 280 to the hollow drill pipe stems 291.
  • the mud pump 263 may be embodied as a POWERHORSE, 2" Semi-Trash pump with a 5 HP, 208 cc engine that pumps 1750 gallons per hour.
  • the ratchet arm assembly 270 includes a connected 271 for attachment to the drill swivel 280, with an arm 272 attached thereto and a handle 273.
  • the ratchet arm assembly 270 has idle and lock positions, see lock 274.
  • the drill pipe assembly includes a plurality of connectable pipe stems 291 with coupling/female ends 293 for attachment to one another's male end 292 or to the threaded portion 281 of the drill swivel 280.
  • FIGS. 21-28 are photographs provided to help understand the general setup and operation of apparatus 200. The steps shown in FIGS. 21-28 are similar to those previously described with the LS-100 setup and operation, thus a detailed explanation is omitted for purposes of brevity.
  • the suction/settling pit 261 is dug out, and the frame 210 of the apparatus 200 is oriented and leveled at the drill site location for making the eventual borehole 205 as shown in FIG. 21, a drain ditch 265 is created between the location where the borehole 205 will be dug and the suction/settling pit 261.
  • an operator 203 operates the winch assembly 220 (FIG. 22) so as to raise the motor assembly 242 up along beams 212 a sufficient height so that the drill pipe assembly 290 may be attached to the threaded portion 281 of the drill swivel 280.
  • the protective cap 282 is removed from the threaded portion 281 of the drill swivel 280.
  • a pipe wrench 202 is employed, and will also be used to rotate the female and 293 of the drill pipe stem 291 onto the threaded portion 281.
  • one of the bits 294 A/B is attached at the mail and 292 of a drill pipe stem 291.
  • FIG. 24 illustrates an example set up in Zambia. Note that a strainer 266 is utilized at the terminus of the drain ditch 265 to filter out larger debris being removed as the borehole 205 is created. In this particular evolution, as comealongs 235 were not readily available, weight bags 235' were utilized to stabilize frame 210, in addition to the stabilizer assembly 230.
  • FIGS. 25 to 28 The drilling operation may be explained with reference to FIGS. 25 to 28.
  • a guide hole 204 is formed; in this photograph a rock bit 294A is being used.
  • FIG. 26 shows an active operation of forming the borehole 205; and
  • FIG. 27 illustrates the excess cuttings, used drilling fluid and debris removed by the apparatus 200, running down ditch 265 and through strainer 266 into the suction/settling pit 261.
  • FIG. 28 show the completed borehole 205, ready for installation of the screen and casing, gravel pack, annular seal, cement pad, and hand pump to complete the protected well, as is known.
  • the present invention in its various embodiments, configurations, and aspects, includes components, systems and/or apparatuses substantially as depicted and described herein, including various embodiments, sub-combinations, and subsets thereof. Those of skill in the art will understand how to make and use the present invention after understanding the present disclosure.
  • the present invention in its various embodiments, configurations, and aspects, includes providing devices in the absence of items not depicted and/or described herein or in various embodiments, configurations, or aspects hereof, including in the absence of such items as may have been used in previous devices, e.g., for improving performance, achieving ease and ⁇ or reducing cost of implementation.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

La présente invention concerne un appareil portable de forage de puits peu profond (200). L'appareil (200) est léger, modulaire et facile à transporter et à assembler au niveau d'un site de forage à distance. L'appareil (200) comprend : un châssis globalement rectangulaire (210) pourvu d'une pluralité de poutrelles de support à segments multiples (212) en une relation espacée et s'étendant verticalement depuis une base inférieure (211) jusqu'à un couvercle supérieur (213) dont aucun composant n'a une longueur supérieure à cinq pieds (152 cm) ; un ensemble treuil (220) fixé au châssis (210) ; un moteur (248) monté de manière amovible sur le châssis (210) et pouvant coulisser de haut en bas par rapport aux poutrelles (212) par l'intermédiaire de l'ensemble treuil (220) ; une transmission (250) couplée de manière amovible au moteur (248) ; et un ensemble tige de forage (290) couplé de manière amovible à la transmission (250).
PCT/US2017/013161 2016-01-13 2017-01-12 Appareil de forage de puits peu profond Ceased WO2017123736A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201662278061P 2016-01-13 2016-01-13
US62/278,061 2016-01-13
US15/397,120 US20170198524A1 (en) 2016-01-13 2017-01-03 Shallow well-drilling apparatus
US15/397,120 2017-01-03

Publications (2)

Publication Number Publication Date
WO2017123736A2 true WO2017123736A2 (fr) 2017-07-20
WO2017123736A3 WO2017123736A3 (fr) 2017-10-26

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170198524A1 (en) * 2016-01-13 2017-07-13 Northeast Texas Disaster Response, Inc. Shallow well-drilling apparatus
US10279508B1 (en) * 2018-05-28 2019-05-07 Lee C. Thornton Heavy equipment concrete core drill attachment
US10711525B2 (en) 2018-05-28 2020-07-14 Lee C. Thornton Heavy equipment concrete core drill bit stabilizer
CN113982482B (zh) * 2021-11-17 2024-06-07 武威 一种公路桥梁施工钻孔平台
CN115045614A (zh) * 2022-08-15 2022-09-13 徐州融河机械制造有限公司 一种矿洞壁采矿车

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Publication number Priority date Publication date Assignee Title
US4778142A (en) * 1987-07-10 1988-10-18 Roba John D Awning anchor
US5199507A (en) * 1992-02-05 1993-04-06 Westmoreland Harry L Portable drilling system
US8602123B2 (en) * 2009-08-18 2013-12-10 Crux Subsurface, Inc. Spindrill
US20140238747A1 (en) * 2013-02-25 2014-08-28 Paul J. Fabian Auger stand for a utility truck and method of using same
US20170198524A1 (en) * 2016-01-13 2017-07-13 Northeast Texas Disaster Response, Inc. Shallow well-drilling apparatus

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WO2017123736A3 (fr) 2017-10-26

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