WO2001006085A1 - Structure amelioree de boitier de sonde - Google Patents

Structure amelioree de boitier de sonde Download PDF

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Publication number
WO2001006085A1
WO2001006085A1 PCT/US2000/019236 US0019236W WO0106085A1 WO 2001006085 A1 WO2001006085 A1 WO 2001006085A1 US 0019236 W US0019236 W US 0019236W WO 0106085 A1 WO0106085 A1 WO 0106085A1
Authority
WO
WIPO (PCT)
Prior art keywords
sonde
cartridge
housing
cavity
tube
Prior art date
Application number
PCT/US2000/019236
Other languages
English (en)
Inventor
Steven W. Wentworth
Robert F. Crane
Original Assignee
Earth Tool Company, L.L.C.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Earth Tool Company, L.L.C. filed Critical Earth Tool Company, L.L.C.
Priority to GB0106632A priority Critical patent/GB2360306A/en
Priority to AU62140/00A priority patent/AU6214000A/en
Priority to DE10082552T priority patent/DE10082552T1/de
Priority to CA002343382A priority patent/CA2343382A1/fr
Publication of WO2001006085A1 publication Critical patent/WO2001006085A1/fr

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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
    • E21B47/017—Protecting measuring instruments
    • 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
    • E21B7/04—Directional drilling
    • E21B7/06—Deflecting the direction of boreholes

Definitions

  • the present invention relates to directional drilling, particularly to a sonde housing structure for use with a directional drilling bit.
  • Directional drilling is used for boring under or through obstructions such as roadways, concrete lined waterways and large underground utilities to provide a passageway for utility lines without the need for trenching through or excavating around the particular obstruction. This need has been met by the development of a variety of systems for the installation of underground conduits and pipe bursting/replacement systems.
  • the directional borer generally includes a series of drill rods joined end to end to form a drill string.
  • the drill string is pushed though the soil by means of a powerful device such as a hydraulic cylinder.
  • the drill string ends in a bit having a sloped front face that causes the bit and drill string to deviate in the direction of the sloped face in order to steer.
  • the bit may be pushed and rotated and the same time in order to drill straight. See McDonald U.S. Patent No. 4,694,913, issued September 22, 1987.
  • a spade, bit or head configured for boring is disposed at the end of the drill string and may include an ejection nozzle for water to assist in boring.
  • Accurate directional boring necessarily requires information regarding the orientation and depth of a cutting or boring tool. Consequently, a sensor and transmitting device (“sonde”) attached to the cutting tool is normally required to prevent mis-boring and re-boring. See, for example, Mercer U.S. Patent Nos. 5,155,442 and 5,633,589.
  • the sonde includes electronic and electromagnetic components that are sensitive to vibration and may fail if subjected to excessive vibrational shock in service. Since the sonde needs to be positioned adjacent to the cutting or boring head in a drill string in order to provide accurate information regarding the orientation of the cutting head, any vibrations or shock may result in premature failure of the sonde. Additionally, a sonde used in directional boring needs to be housed in a manner that facilitates easy access while simultaneously providing adequate protection to the device.
  • Sondes have been located inside of a bit assembly, such as shown in Stangl U.S. Patent No. 4,907,658. More typically, however, the sonde is located in a tubular housing that can be connected and disconnected from the housing. The sonde itself is loaded into a compartment that is isolated from compressed fluid that is supplied to the bit through a separate passage in the sonde housing. See Wentworth PCT Publication No. WO 00/11303, published March 2, 2000, and Cox U.S. Patent Nos. 5,950,743, 5,934,391, 5,931,240 and 5,899,283 for side load sonde housings wherein a door or cover for the sonde compartment is provided.
  • End load sonde housings are also known wherein the sonde is loaded into a blind hole at the rear end of the sonde housing, which is then coupled to a trailing component such as a starter rod. A spacer is inserted behind the sonde to hold it in place.
  • the present invention provides an end load sonde housing system that is easier to access than known end load systems.
  • an apparatus for mounting an electronic device therein for use in an underground boring machine includes an elongated housing having an elongated, lengthwise central cavity opening at one end thereof.
  • a cartridge containing a sonde fits in the cavity.
  • a keying mechanism is provided on the cartridge and sonde, and also between the cartridge and the housing, for securing the cartridge and sonde in a predetermined orientation relative to the sonde housing when the cartridge is inserted into the cavity through the opening.
  • the sonde housing also preferably includes a lengthwise fluid passage therein which is isolated from the cavity containing the cartridge.
  • an end cap or plug is also provided which holds the sonde cartridge in its installed position and isolates it from contact with the pressure fluid in configurations where the fluid passage and cavity branch from a common end opening of the housing.
  • a drill head for use in directional drilling includes an elongated housing having an elongated, lengthwise central sonde cavity opening at a front end thereof, a keying mechanism for securing the sonde in a predetermined orientation relative to the housing when the sonde is inserted into the cavity through the opening, a closure device for enclosing the cavity with the sonde therein, and a bit assembly mounted at the front end of the sonde housing, such that upon removal of the bit assembly, the cavity containing the sonde can be accessed.
  • the sonde is contained within a cartridge as described below.
  • a drill string may be directly connected to a rear end of sonde housing without need for an adapter or starter rod.
  • fluid passages conduct a pressure fluid through the sonde housing to its front end to further fluid passages in the bit assembly.
  • the closure device comprises a cap which seals the cavity from the pressure fluid, whether or not the cap forms part of a cartridge for the sonde.
  • a sonde cartridge comprises a tube sized to closely receive a cylindrical sonde therein, the tube having alignment openings therein whereby a pin can be used to secure the tube against movement relative to a sonde housing in which the cartridge is to be installed, an end cap which fits into one end of the tube, a keying device which can engage a notch in the sonde so that the sonde may be installed in a predetermined position within the cartridge, and a fastener for securing the end cap to the tube.
  • the present invention provides an improved end load sonde housing that is inherently stronger than conventional side load configurations and which provides a non-threaded mechanism for indexing and maintaining the sonde in the proper clockwise position, thereby minimizing the possibility of misboring.
  • Fig. 1 is a side view of the sonde housing according to the invention
  • Fig. 2 is a rear end view of the housing shown in Fig. 1 ;
  • Fig. 3 is a lengthwise section taken along the line B-B in Fig. 2;
  • Fig. 4 is a rear perspective view of the sonde housing of Fig. 1;
  • Fig. 5 is a directional drill head using the sonde housing of the present invention.
  • Fig. 6 is a front view of the drill of Fig. 5;
  • Fig. 7 is a lengthwise section taken along the line A- A in Figure 6;
  • Fig. 8 is a side view of a sonde cartridge according to the invention.
  • Fig. 9 is a front view of the cartridge of Fig. 8;
  • Fig. 10 is a rear (hook end) view of the cartridge of Fig. 8;
  • Fig. 11 is a lengthwise section taken along line C-C in Figure 9;
  • Fig. 12 is a perspective view of the cartridge shown in Fig. 8;
  • Figs. 13-17 are views comparable to Figs. 8-12, with the cartridge outer tube removed for clarity;
  • Fig. 18 is an exploded view of the cartridge tube, sonde and cap assembly shown previously;
  • Fig. 19 is an exploded view of the cartridge, sonde housing and drill bit
  • Fig. 20 is a side view of a directional drill employing a second embodiment of the invention wherein the sonde housing functions as a combination of sonde housing and starter rod and wherein the sonde is loaded into the housing from the front end;
  • Fig. 21 is top view of the directional drill of Figure 20;
  • Fig. 22 is a lengthwise section taken along line A-A of Figure 21;
  • Fig. 23 is a partial cross section taken along line D-D of Figure 20;
  • Fig. 24 is a partial cross section taken along line B-B of Figure 21;
  • Fig. 25 is a partial cross section taken along line C-C of Figure 21 ;
  • Fig. 26 is a side view of a sonde cartridge in accordance with the second embodiment of the invention.
  • Fig. 27 is a top view of the sonde cartridge of Figure 26;
  • Fig. 28 is a cross section taken along line B-B of Figure 27
  • Fig. 29 is a lengthwise section taken along line A-A of Figure 27;
  • Fig. 30 is a top view of the sonde housing with a threaded male adapter installed.
  • Sonde housing 12 comprises a generally cylindrical structure with a longitudinal central cavity and, as illustrated, includes joint ends 13 and 15 of non-threaded couplings suitable for coupling the housing to a drill string and mounting an appropriately designed boring bit 14 or other tool.
  • the sonde housing 12 is configured in accordance with Splinelok*" 1 joint system described in the foregoing patent application incorporated by reference herein.
  • the geometry of the sonde housing of the invention is especially suited to protecting the combination sensor and transmitting device that comprises a sonde and allowing for transmission of the information collected to the operator via electromagnetic waves or through a wireline.
  • Sonde 18 transmits radio signals defining the subterranean location of the drill head 14 to an operator and the orientation of the slanted front bit face used for steering. Sonde 18 typically transmits information regarding the position, depth, pitch of the axis relative to gravity and clock position of the apparatus. This information allows the operator to determine which direction bit 14 will go during a steering correction. In order to measure the clock position of bit 14 accurately, sonde 18 must be held in registry relative to particular features on the boring head or bit 14. Referring to Figures 1-7, sonde housing 12 includes an axially extending, rearwardly opening blind hole. This blind hole, henceforth referred to as the cartridge bore or cavity 22, is configured to receive a sonde cartridge 20 ( Figures 8-12) encapsulating sonde 18.
  • a cross-drilled hole 26 is positioned near the blind end 24 of the cartridge bore 22.
  • a spiral wound roll pin 30 (Fig. 7) is inserted into hole 26. This transverse pin 30 serves to orient cartridge 20 when the cartridge is installed in the cartridge bore 22.
  • Radial slots 40 extend through sonde housing 12 and into cartridge bore 22. Slots 40 permit transmission of the sonde signal into the surrounding ground. Without slots 40, the steel of the housing 12 would shield or block the signals. Alternatively, a wireline (not shown) could be utilized to transmit information.
  • Sonde housing 12 also has an axial fluid passage 16 passing lengthwise through the housing 12 and bit 14 to conduct the drilling fluid around the sonde 18. Fluid is injected through the drill string to a starter rod 56 and then into passage 16 to provide lubrication to the bit and to carry away debris generated during the drilling operation.
  • cartridge 20 includes an outer tube 42 designed to provide a snug slip-fit over the sonde 18.
  • tube 42 is formed from a material such as plastic which allows transmission of the radio signal.
  • a U-shaped guide 44 is provided at front end 43 of tube 42.
  • Guide 44 includes a pair of relieved edges 48 that snap fit into corresponding lengthwise, opposed grooves 54 in tube 42, securing the guide in the tube and providing for proper longitudinal and clockwise alignment of the cartridge 20 and sonde 18 within housing 12.
  • Guide 44 has a small, rearwardly extending tab 46 which fits in a corresponding notch in the end of the sonde 18, thereby preventing rotation of sonde 18 within the cartridge 20 and keying the sonde to a predetermined position relative to cartridge 20.
  • roll pin 30 passes through the middle of the "U" of guide 44.
  • a pair of opposed, frontwardly opening keyhole-shaped slots 50 at the front end 43 of the cartridge extend through the wall of tube 42. Slots 50 snap over the transverse pin 30 described above, so that the rounded inner ends 52 of slot 50 engage the transverse pin.
  • the mating of the keyhole shaped slots 50 and transverse pin 30 prevent rotation of the cartridge 20 (and therefore of sonde 18) within the cartridge bore 22 of housing 12, maintaining the clockwise orientation of the cartridge within the bore.
  • Cap 38 may be formed from any appropriate material, such as steel, plastic or aluminum, so long as the cap 38 is capable of sealing the cartridge bore against the entry of high pressure (2000 psi) drilling mud or fluid and bearing the applied load of the fluid.
  • high pressure drilling mud or fluid is present at the joint between the sonde housing 12 and the starter rod 56 as it moves from the drill string through the starter rod 56 and into a rear end opening 15 which is slightly larger in diameter than cavity 22 and configured to receive the projecting end of the starter rod therein.
  • passage 16 and cavity 22 both branch from rear opening 15.
  • Cap 38 is provided with an annular flange or lip 36 that serves to bear the load upon the rearwardly facing depression 34 in housing 12, protecting sonde 18 from the load.
  • cap 38 is provided with a series of annular grooves 35 along its midsection for mounting elastomeric O-rings 37 which further seal any gap between the cap and cartridge bore 22.
  • a rubber nub 39 at the end of cap 38 remote from end flange 36 resiliently engages the rear end of sonde 18.
  • sonde cartridge 20 receives guide 44 at a position predetermined by slots 54, and guide 44 in turn is provided with indexing tab or key 46 to position sonde 18 in one orientation within the cartridge.
  • cartridge 20 has keyhole slots 50 which engage transverse pin 30 to position the cartridge in one of two possible orientations, each 180° apart.
  • this arrangement still allows the cartridge 20 and sonde 18 to possibly be inverted 180° upon installation in sonde housing 12.
  • flange 36 of cap 38 is provided with an alignment feature.
  • the alignment feature comprises lateral wings or tabs 60.
  • Wings 60 fit only into a profiled portion 62 of recess 34 ( Figures 3 and 6), thereby aligning cartridge 20 in the proper orientation relative to housing 12. This feature provides the assembler with a means of avoiding a situation where the cartridge is accidentally inverted 180° degrees from the correct clockwise orientation during installation.
  • Cap 38 is secured to tube 42 by bolts 70 that are received in apertures 72 through the wall of plastic tube 42 and are tightened into threaded holes 73 against a counterbore 74 in cap 38.
  • the heads of bolts 70 function as shear pins to keep cap 38 aligned as well as providing a means to extract the outer tube 42 and sonde 18 from the cartridge bore 22.
  • a hook eye 76 on the outer surface of cap 38 provides means for pulling cartridge 20 out of housing bore 22.
  • a sonde housing 112 is adapted to be directly connected to the lead end of a drill string (not shown) thereby eliminating the necessity for a starter rod.
  • Housing 112 includes a central cavity or bore 122 and, as illustrated incorporates a non- threaded joint 113, such as the Splinelok tm joint for mounting a downhole tool, such as a bit assembly 114.
  • Bit assembly 114 includes an interchangeable bit 117 and a bit head 119.
  • the sonde housing 112 consists of a generally cylindrical body including a cartridge bore 122 extending rearwardly from a forward end 182, the forward end 182 being adapted to receive a drill bit 114 or similar tool.
  • sonde housing 112 is incorporates the Splinelok ta joint system described in pending PCT application cited above.
  • a threaded adapter 100 may be mounted on sonde housing 112 upon removal of bit assembly 114 to provide for use of other bits or back reamers tools adapted for threaded connection.
  • Sonde housing 112 includes a threaded aperture 180 for receiving a male end of a leading drill rod (not shown) and a passageway 178 for a wireline in case where a wireline-type sonde is used. Passageway 178 is sealed by a plastic or rubber plug, not shown, prior to use to prevent pressure fluid from entering the sonde compartment. Such a plug is either completely solid, or else may be formed around the wire line. As shown in Figure 24, housing 112 also include a pair of fluid passageways 116 that extend the length of the housing to allow flow of drilling fluid from the drill string through the housing to the bit assembly 114. Cartridge bore 122 extends longitudinally along a portion of the length of housing 112 from the forward end of housing 112.
  • cartridge bore 122 terminates in a blind or, in the case of a wire-line type sonde, a semi-blind end 124.
  • bit assembly 114 is retained on the forward end of sonde housing with two pairs of solid steel anchor pins 184 that pass through apertures 188 in housing 112.
  • Anchor pins 184 pass through holes in the male end 186 of bit assembly 114 to secure the bit to the housing 112.
  • Anchor pins 184 are formed with a pair of rounded, circumferential grooves 187 that are spaced for alignment with a retainer hole 192 that passes through housing 112 and is substantially perpendicular to apertures 188.
  • Retainer holes 192 are aligned to intersect the grooves 187 of anchor pins 184 so that a retainer 190 inserted in retainer hole 192 fits into grooves 186 of anchor pins 184, locking the anchor pins in position.
  • retainers 190 are roll pins, i.e. a flat sheet of steel rolled into a tube. Resilient engagement between retainers 190 and the walls of retainer holes 192 and/or interference with anchor pins 184 maintain retainers 190 in place upon installation.
  • other engagement mechanisms between the bit assembly and sonde housing such as the splined connections shown in the above-cited PCT publication, or even a threaded connection, may also be employed. A threaded connection is, however, more difficult to use and is not preferred.
  • bit assembly 114 may be replaced by the bit 14 discussed in connection with the first embodiment above.
  • a sonde cartridge 120 for use in connection with the front loading sonde housing of the invention includes an outer plastic tube 142 and an end cap 138 generally similar to cap 38 and tube 42 discussed above.
  • a retainer 130 such as a roll pin passes through tube 142 and a transverse hole in sleeve 147 adjacent to a rear end 143 of cartridge 120 to secure cartridge 120 in the sonde housing.
  • Sleeve 147 may be formed from an elastomeric material to provide a resilient cushion for sonde 18.
  • Cap 138 includes an annular flange 136 designed to fit into a shallow depression 134 ( Figure 22) formed at the forward end of cartridge bore 122. Cap 138 also includes a key or tab 146 at its rear end that indexes against the notch in sonde 18 to position the sonde at the proper clockwise orientation within the tube 142.
  • Sonde housing 112 includes a cross-drilled hole 126 that passes through the housing and cartridge bore 122. A transverse retainer, such as a roll pin 130 is inserted through the cross-drilled hole 126.
  • Tube 142 includes an aperture 172 that extends through the wall of plastic tube 142 for receiving a bolts or screws 170 in order to secure cap 138 onto the tube.
  • Bolt 170 is tightened into one or more holes 174 in cap 138 to secure the cap 138 and sonde 18 in cartridge 122.
  • the front end of cap 138 may include a recessed crossbar 135 that serves as a handle for pulling cartridge 120 from bore 122.
  • Flange 136 is provided with wings 160 that engage profiled recess 162 of cartridge bore 122. As previously discussed, wings 160 in conjunction with profiled section 162 prevent the cartridge 120 from being accidentally inverted from the proper clockwise orientation when installed in cartridge bore 122.
  • Fluid passages 116 terminate at a rear end opening 201 in the bit assembly, which communicates with fluid channels 216 in the bit assembly.
  • the arrangement of the first embodiment is thus reversed, with cap 138 performing the same functions but now facing frontwardly at the joint between the bit assembly and the sonde housing. As such, upon removal of the bit, which occurs frequently, this embodiment of the invention allows ready access to the sonde and the same time.
  • the sonde housing of the invention provides for securing a sonde in an indexed position with a combination of orienting features that require the installation of the sonde in the proper orientation.
  • the sonde housing described herein, in combination with the Splinelok 1 " 1 joint maintains a bit or tool in a known clockwise orientation with the sonde.
  • the orientation of the tool relative to the sonde is not dependent upon the orientation of a threaded tool connection. This feature represents a substantial advantage over prior art designs that are susceptible to mis-orientation due to the use of a threaded tool connection.
  • the sonde housing described above provides proper sonde orientation in an end loading housing that structurally superior to side load configurations that by design weaken the torsional and bending strength of a housing, require complicated closure mechanisms, and/or are more likely to fail.

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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)
  • Geophysics (AREA)
  • Earth Drilling (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

Selon cette invention, un appareil (10) à l'intérieur duquel est monté un dispositif électronique destiné à être utilisé dans une machine de forage souterraine comprend un boîtier allongé (12) possédant une ouverture en forme de cavité centrale allongée (22), une cartouche contenant la sonde, ladite cartouche rentrant dans la cavité; et un mécanisme de clavetage (15) destiné à solidariser la cartouche et la sonde en leur conférant une orientation prédéterminée par rapport au boîtier (12) lorsque la cartouche est insérée dans la cavité à travers l'ouverture (22).
PCT/US2000/019236 1999-07-16 2000-07-14 Structure amelioree de boitier de sonde WO2001006085A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB0106632A GB2360306A (en) 1999-07-16 2000-07-14 Improved sonde housing structure
AU62140/00A AU6214000A (en) 1999-07-16 2000-07-14 Improved sonde housing structure
DE10082552T DE10082552T1 (de) 1999-07-16 2000-07-14 Verbesserte Sondengehäuse-Baugruppe
CA002343382A CA2343382A1 (fr) 1999-07-16 2000-07-14 Structure amelioree de boitier de sonde

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14454699P 1999-07-16 1999-07-16
US60/144,546 1999-07-16

Publications (1)

Publication Number Publication Date
WO2001006085A1 true WO2001006085A1 (fr) 2001-01-25

Family

ID=22509072

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/019236 WO2001006085A1 (fr) 1999-07-16 2000-07-14 Structure amelioree de boitier de sonde

Country Status (5)

Country Link
AU (1) AU6214000A (fr)
CA (1) CA2343382A1 (fr)
DE (1) DE10082552T1 (fr)
GB (1) GB2360306A (fr)
WO (1) WO2001006085A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6705415B1 (en) 1999-02-12 2004-03-16 Halco Drilling International Limited Directional drilling apparatus
EP1158138A3 (fr) * 2000-05-22 2004-03-17 Services Petroliers Schlumberger Communication et mesure de signaux de puits à travers un tube métallique
US6836218B2 (en) 2000-05-22 2004-12-28 Schlumberger Technology Corporation Modified tubular equipped with a tilted or transverse magnetic dipole for downhole logging
US6995684B2 (en) 2000-05-22 2006-02-07 Schlumberger Technology Corporation Retrievable subsurface nuclear logging system
CN1312490C (zh) * 2001-08-21 2007-04-25 施卢默格海外有限公司 一种井下管状物
CN102996076A (zh) * 2012-11-27 2013-03-27 恒天九五重工有限公司 一种水平定向钻机钻头
CN111779462A (zh) * 2020-08-02 2020-10-16 濮阳中原三力创高机械设备有限公司 浮箍与胶塞互锁装置及应用方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116084839B (zh) * 2023-04-11 2023-06-27 中南大学 复杂地质环境下空间姿态自适应智能靶向钻具系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4694913A (en) * 1986-05-16 1987-09-22 Gas Research Institute Guided earth boring tool
US4907658A (en) * 1988-09-29 1990-03-13 Gas Research Institute Percussive mole boring device with electronic transmitter
US5899283A (en) * 1997-02-05 1999-05-04 Railhead Underground Products, L.L.C. Drill bit for horizontal directional drilling of rock formations
US5950743A (en) * 1997-02-05 1999-09-14 Cox; David M. Method for horizontal directional drilling of rock formations

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4694913A (en) * 1986-05-16 1987-09-22 Gas Research Institute Guided earth boring tool
US4907658A (en) * 1988-09-29 1990-03-13 Gas Research Institute Percussive mole boring device with electronic transmitter
US5899283A (en) * 1997-02-05 1999-05-04 Railhead Underground Products, L.L.C. Drill bit for horizontal directional drilling of rock formations
US5950743A (en) * 1997-02-05 1999-09-14 Cox; David M. Method for horizontal directional drilling of rock formations

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6705415B1 (en) 1999-02-12 2004-03-16 Halco Drilling International Limited Directional drilling apparatus
EP1158138A3 (fr) * 2000-05-22 2004-03-17 Services Petroliers Schlumberger Communication et mesure de signaux de puits à travers un tube métallique
US6836218B2 (en) 2000-05-22 2004-12-28 Schlumberger Technology Corporation Modified tubular equipped with a tilted or transverse magnetic dipole for downhole logging
US6885308B2 (en) 2000-05-22 2005-04-26 Schlumberger Technology Corporation Logging while tripping with a modified tubular
US6903660B2 (en) 2000-05-22 2005-06-07 Schlumberger Technology Corporation Inductively-coupled system for receiving a run-in tool
US6975243B2 (en) 2000-05-22 2005-12-13 Schlumberger Technology Corporation Downhole tubular with openings for signal passage
US6995684B2 (en) 2000-05-22 2006-02-07 Schlumberger Technology Corporation Retrievable subsurface nuclear logging system
US7187297B2 (en) 2000-05-22 2007-03-06 Schlumberger Technology Corporation Methods for sealing openings in tubulars
US7692428B2 (en) 2000-05-22 2010-04-06 Schlumberger Technology Corporation Retrievable formation resistivity tool
CN1312490C (zh) * 2001-08-21 2007-04-25 施卢默格海外有限公司 一种井下管状物
CN102996076A (zh) * 2012-11-27 2013-03-27 恒天九五重工有限公司 一种水平定向钻机钻头
CN111779462A (zh) * 2020-08-02 2020-10-16 濮阳中原三力创高机械设备有限公司 浮箍与胶塞互锁装置及应用方法

Also Published As

Publication number Publication date
CA2343382A1 (fr) 2001-01-25
AU6214000A (en) 2001-02-05
GB0106632D0 (en) 2001-05-09
DE10082552T1 (de) 2001-10-04
GB2360306A (en) 2001-09-19

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