US20130233624A1 - Drilling apparatus having head - Google Patents

Drilling apparatus having head Download PDF

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Publication number
US20130233624A1
US20130233624A1 US13/824,848 US201113824848A US2013233624A1 US 20130233624 A1 US20130233624 A1 US 20130233624A1 US 201113824848 A US201113824848 A US 201113824848A US 2013233624 A1 US2013233624 A1 US 2013233624A1
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US
United States
Prior art keywords
driving shaft
drilling
screw coupling
screw
rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US13/824,848
Inventor
Suk Shin In
Original Assignee
Suk Shin In
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
Priority to KR10-2010-0095223 priority Critical
Priority to KR20100095223 priority
Priority to KR10-2011-0045376 priority
Priority to KR1020110045376A priority patent/KR20120033954A/en
Application filed by Suk Shin In filed Critical Suk Shin In
Priority to PCT/KR2011/007283 priority patent/WO2012044127A2/en
Publication of US20130233624A1 publication Critical patent/US20130233624A1/en
Abandoned legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • E21B7/02Drilling rigs characterized by means for land transport with their own drive, e.g. skid mounting or wheel mounting
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02Couplings; joints
    • E21B17/03Couplings; joints between drilling rod or pipe and drill motor or surface drive, e.g. between drilling rod and hammer

Abstract

Disclosed is a drilling apparatus having a head. The drilling apparatus includes a main body, a lead supported by the main body of the drilling apparatus, a driving shaft slidably installed in the lead and having a unit rod connected thereto for performing a drilling work, and a head having an actuator for driving the driving shaft, wherein the driving shaft includes a screw coupling part formed on the outer circumferential surface of the driving shaft and screw-coupled with an end of the unit rod for performing the drilling work, and a screw coupling inducing part formed at a front end of the screw coupling part to induce screw coupling between the driving shaft and a rod screw coupling part formed at a hollow part formed at the end of the unit rod. The drilling apparatus can reduce the number of work numbers by combining the unit rod with the driving shaft, thereby increasing the efficiency of the drilling work.

Description

    TECHNICAL FIELD
  • The present invention relates to a drilling apparatus, and more particularly, to a drilling apparatus having a head, which facilitates engagement or disengagement between a rod and a driving shaft installed in the head when a drilling work is performed using a bit.
  • BACKGROUND ART
  • In general, a drilling apparatus is used to excavate deep holes into the ground for purposes of boring, soil testing or development of underground water. The drilling apparatus is classified into a type in which a boring work is performed while rotating a rod having a bit, and a type in which a boring work is performed by rotating a rod having a bit or a cutter and striking the bit or the cutter using the rod.
  • A conventional drilling apparatus is disclosed in Korean Patent No. 624233. The disclosed drilling apparatus comprises a main body having a driving device such as an engine, a leader supported by the main body, and a head sliding along the leader and generating an elevational force or a rotational force by a driving device provided in the main body, a rod coupled to the head and elevating or rotating by the head, and a drill unit provided at a front end of the rod and perforate the ground while elevating or rotating along with the rod.
  • The drill unit includes a bit striking and drilling the ground and a hammer operated by a hydraulic pressure to apply a striking force to the beat. The drilling apparatus is configured to drill the ground to a predetermined depth such that the bit of the drill unit rotates or strikes the ground.
  • As the excavated depth increases in the course of drilling, the drilling work is performed by connecting unit rods to allow a drill unit to excavate the ground deeper and deeper. The unit rods are connected such that a driving shaft of a head is separated from the unit rod currently performing the drilling work and then connected to a new unit rod to perform a drilling work.
  • In the course of drilling, if the unit rods have relatively small diameters, it is difficult to align the driving shaft of the head with the unit rod. In particular, even if the unit rod and the driving shaft are coaxially aligned, it is not easy to screw-couple the unit rod to the driving shaft. Thus, it is impossible to increase the efficiency of the drilling work due to a trouble in screw-coupling of the unit rod and the driving shaft.
  • Meanwhile, a support pipe is installed to prevent a landslide during the drilling work. As the drill unit and the unit rod are inserted into the ground to a gradually increasing depth, it is necessary to connect the support pipe. Since there is no separate means for balancing the support pipe, the support pipe may vibrate or may not be aligned with the center of a rotation shaft. Therefore, it is necessary to adjust the support pipe installed on the ground when the support pipe is connected.
  • DISCLOSURE OF THE INVENTION
  • In order to overcome the above-mentioned shortcomings, the present invention provides a drilling apparatus having a head, which facilitates engagement or disengagement between a rod and a driving shaft of the head when a drilling work is performed, thereby increasing the efficiency in the drilling work.
  • The present invention also provides a drilling apparatus having a head, which enables engagement between a driving shaft and a unit rod according to the diameter of the unit rod connected to the driving shaft.
  • According to an aspect of the invention, there is provided a drilling apparatus having a head, including a main body, a lead supported by the main body of the drilling apparatus, a driving shaft slidably installed in the lead and having a unit rod connected thereto for performing drilling work, and a head having an actuator for driving the driving shaft, wherein the driving shaft includes a screw coupling part formed on the outer circumferential surface of the driving shaft and screw-coupled with an end of the unit rod for performing the drilling work, and a screw coupling inducing part formed at a front end of the screw coupling part to induce screw coupling between the driving shaft and a rod screw coupling part formed at a hollow part formed at the end of the unit rod.
  • A stopper may be provided on the outer circumferential surface of a top end of the screw coupling part of the driving shaft for preventing the unit rod screw-coupled to the driving shaft from elevating.
  • The screw coupling induction part may include a taper part extending from the screw coupling part of the driving shaft to an end of the screw coupling induction part and having diameters gradually decreasing.
  • According to another aspect of the invention, there is provided a drilling apparatus having a head, including a main body, a lead supported by the main body of the drilling apparatus, a driving shaft slidably installed in the lead and having a unit rod connected thereto for performing drilling work, and a head having an actuator for driving the driving shaft, wherein the driving shaft includes a first driving shaft supported on the head body by a bearing and exposed to a bottom end of the head body, and a second driving shaft having a screw coupling part screw-coupled coaxially with the first driving shaft and screw-coupled with an end of the unit rod for performing the drilling work, and a screw coupling inducing part formed at a front end of the screw coupling part to induce screw coupling between the driving shaft and a rod screw coupling part formed at a hollow part formed at the end of the unit rod.
  • The first driving shaft may include stepped coupling parts having different diameters, and a plurality of second driving shafts having different diameters to be selectively coupled to the coupling parts of the first driving shaft.
  • As described above, in the drilling apparatus having a head according to the present invention, the unit rod and the driving shaft can be easily engaged with each other during a drilling work, thereby increasing the efficiency of the drilling work.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • The objects, features and advantages of the present invention will be more apparent from the following detailed description in conjunction with the accompanying drawings, in which:
  • FIG. 1 is a side view of a drilling apparatus having a head according to the present invention;
  • FIG. 2 is a cross-sectional view of the drilling apparatus shown in FIG. 1;
  • FIG. 3 is an exploded perspective view of a driving shaft according to an embodiment of the present invention;
  • FIGS. 4 and 5 are perspective views of driving shafts according to another embodiment of the present invention; and
  • FIG. 6 is a perspective view illustrating a state in which a driving shaft and a unit rod are engaged with each other.
  • BEST MODE FOR CARRYING OUT THE INVENTION
  • Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
  • The drilling apparatus according to the present invention facilitates engagement between a unit rod and a driving shaft of the head when the ground hole is excavated, and en exemplary embodiment of the drilling apparatus is shown in FIGS. 1 to 5.
  • Referring to FIGS. 1 to 5, the drilling apparatus 100 having a head includes a lead 20 supported by a main body 10, a driving shaft 40 slidably installed in the lead 20 and connected to the topmost unit rod among the unit rods 70 connected to each other for drilling work, a head 30 having an actuator (not shown) for driving the driving shaft 40, and a support pipe 200 installed on the ground for preventing earth and sand around a hole excavated by the lead from collapsing.
  • The head 30 slidably installed along the lead 20 and is configured to elevate by a separate driver (although not shown, the driver including sprockets installed at top and bottom portions of the lead 20, a chain locked on the sprockets and having one side fixed to the head 30, and a hydraulic motor driving one of the sprockets). As shown in FIG. 2, a hydraulic motor 33 for driving the driving shaft 40 rotatably supported by the bearing 32 is installed in a main body 31 of the head 30. The hydraulic motor 33 receives hydraulic oil by a hydraulic supply system installed in the main body 10 to then be driven.
  • As shown in FIGS. 2 and 3, the driving shaft 40 includes a screw coupling part 41 and a screw coupling inducing part 42. The screw coupling part 41 is formed on the outer circumferential surface of the driving shaft 40 and is screw-coupled to an end of the unit rod 70 for performing a drilling work. The screw coupling inducing part 42 is formed at a front end of the screw coupling part 41 to smoothly achieve screw coupling between the driving shaft 40 and a rod screw coupling part 73 formed at a hollow part 70 a at the end of the unit rod 70. A stopper 43 is formed on the outer circumferential surface of the driving shaft 40 at a top end of the driving shaft 40, corresponding to a terminating end of the screw coupling part 41, to prevent the unit rod 70 screw-coupled to the screw coupling part 41 from being damaged while rotating.
  • The stopper 43 may include a protrusion formed on the outer circumferential surface of the driving shaft 40, but aspects of the present invention are not limited thereto.
  • The hollow part 40 a is formed at the driving shaft 40 in a lengthwise direction. The screw coupling inducing part 42 may be tapered upwardly from its end. That is to say, a diameter of an end of the screw coupling induction part 42 is smaller than that of the driving shaft 40. Smooth surfaces 45 and 46 symmetrical about the center of the driving shaft 40 are provided at one or more sides of the screw coupling part 41 or the screw coupling inducing part 42. When the driving shaft 40 includes first and second driving shafts to be described later, the smooth surfaces 45 and 46 are provided for engagement or disengagement of the first driving shaft and the second driving shaft.
  • FIG. 4 illustrates a head driving shaft of a drilling apparatus according to another embodiment of the present invention.
  • Referring to FIG. 4, a head driving shaft 50 is supported on the head body 31 by a bearing 32 to be rotatably installed, and includes a first driving shaft 51 formed at an end exposed to a bottom end of the head body 31 and a second driving shaft 55 combined with the first driving shaft 51.
  • The first driving shaft 51 may include stepped coupling parts 51 a, 51 b and 51 c having different diameters. Screws for being coupled to the second driving shaft 55 are formed on the outer circumferential surfaces of the coupling parts 51 a, 51 b and 51 c.
  • The second driving shaft 55 may include a plurality of second driving shafts having different diameters (corresponding to diameters of unit rods) to be engaged with the coupling parts 51 a, 51 b and 51 c of the first driving shaft 51. The second driving shafts 55 having different diameters are provided for the purpose of being compatibly used when the unit rods for performing a drilling work have different diameters.
  • The second driving shaft 55 may include a coupling screw part 56, a screw coupling part 57 and a screw coupling inducing part 58. The coupling screw part 56 is formed on the inner circumferential surface of the second driving shaft 55 to be coaxially coupled to the first driving shaft 51, the screw coupling part 57 is formed on the outer circumferential surface of the second driving shaft 55 to be screw-coupled to the rod screw coupling part 73 of the unit rod 70, and the screw coupling inducing part 58 extends from the screw coupling part 57. As described above, the screw coupling inducing part 58 is tapered such that its diameter gradually decreases from the screw coupling part 57 to its end. The end of the screw coupling induction part 58 may be spherical to facilitate insertion of the hollow part 70 a of the unit rod 70 into the screw coupling induction part 58. A hollow part 40 a is formed in a lengthwise direction of the first and second driving shafts 51 and 55.
  • As shown in FIG. 5, the first and second driving shafts 51 and 55 may be coupled to the first and second driving shafts 51 and 55 by flange parts 61 and 62.
  • A stopper 59 may be installed in the second driving shaft 55 to prevent the unit rod 70 coupled to the second driving shaft 55 and performing a drilling work from elevating while rotating. A position adjusting unit (not shown) may further be provided at an upper portion of the stopper 59 to hold the support pipe 200 inserted into an excavated portion for preventing earth and sand existing around the excavated portion from collapsing. The position adjusting unit is tapered such that its upper side has a larger diameter than the support pipe 200.
  • The aforementioned drilling apparatus operates as follows.
  • As shown in FIGS. 1 and 6, in order to excavate an underground hole using the drilling apparatus according to the present invention, the drilling apparatus is positioned at a portion where the ground hole is to be formed, and the lead 20 is vertically positioned on the portion where the ground hole is to be formed. In such a state, the head 30 is positioned on the lead 20 and the unit rod 70 is then connected to the driving shaft 40. An air hammer or a water hammer 80 for performing a drilling work is installed at a bottom end of the unit rod 70.
  • The unit rod 70 and the driving shaft 40 are engaged with each other such that the unit rod 70 is suspended using a crane (not shown), the screw coupling induction part 42 of the driving shaft 40 is inserted into the hollow part 70 a of the unit rod 70, and the driving shaft 40 is rotated while moving the unit rod 70 and the driving shaft 40 with respect to each other. In such a manner, in a state in which the screw coupling induction part 42 extending from the screw coupling part 41 of the driving shaft 40 is inserted into the hollow part 70 a of the unit rod 70, the screw coupling part 41 is guided to the rod screw coupling part 73 of the unit rod 70, thereby facilitating engagement of the unit rod 70 and the driving shaft 40, which will now be described in more detail. Since the screw coupling induction part 42 provided at the driving shaft 40 has a diameter gradually decreasing from the screw coupling part 41, even if the unit rod 70 and the driving shaft 40 are not aligned in line, the screw coupling induction part 42 can be easily inserted into the hollow part 70 a of the unit rod 70.
  • Therefore, the problem associated with the conventional drilling apparatus, that is, the necessity for making the end of the unit rod 70 and the driving shaft 40 coincide with each other by an operator's manual work, can be solved. In particular, when the unit rod 70 has a small diameter and a small thickness, engagement of the unit rod 70 and the driving shaft 40 can be smoothly achieved by being guided by the screw coupling induction part 42.
  • The above-described operation is achieved in the same manner as in engagement of the second driving shafts 55 and the unit rod 70. In particular, as shown in FIG. 4, the coupling parts 51 a, 51 b and 51 c formed in multiple-steps are provided in the first driving shaft 51, and the second driving shafts 55 suited to diameters of the respective coupling parts 51 a, 51 b and 51 c are provided, thereby allowing the second driving shafts 55 to be compatibly used according to the diameters of the unit rods for performing a drilling work.
  • Meanwhile, the stopper 43 for preventing the unit rod 70 from elevating due to a rotational force of the driving shaft 40 when the unit rod 70 is screw-coupled is provided at the driving shaft 40. Thus, even if a rotational load is applied to the unit rod 70 during a drilling work, it is possible to prevent the unit rod 70 from elevating along the screw coupling part 41 of the driving shaft 40. It is also possible to prevent the unit rod 70 screw-coupled to the screw coupling part 41 from being damaged due to the rotational load applied thereto while rotating. That is to say, the unit rod 70 can be prevented from being damaged, which may be caused when the unit rod 70 elevates to a portion of the driving shaft 40 without screws due to the rotational load.
  • In addition, the position adjusting unit for balancing the support pipe 200 installed for drilling soft ground is further provided at the driving shaft 40. When the head 30 is lowered, the position adjusting unit is inserted into the support pipe 200, thereby aligning centers of the support pipe 200 and the driving shaft 40. Therefore, it is possible to prevent the center of the support pipe 2000 from deviating from the center of the unit rod 70 while the drilling work is performed.
  • Although exemplary embodiments of the present invention have been described in detail hereinabove, it should be understood that many variations and modifications of the basic inventive concept herein described, which may appear to those skilled in the art, will still fall within the spirit and scope of the exemplary embodiments of the present invention as defined by the appended claims.

Claims (5)

What is claimed is:
1. A drilling apparatus having a head, comprising:
a main body;
a lead supported by the main body of the drilling apparatus;
a driving shaft slidably installed in the lead and having a unit rod connected thereto for performing a drilling work; and
a head having an actuator for driving the driving shaft,
wherein the driving shaft includes a screw coupling part formed on the outer circumferential surface of the driving shaft and screw-coupled with an end of the unit rod for performing the drilling work, and a screw coupling inducing part formed at a front end of the screw coupling part to induce screw coupling between the driving shaft and a rod screw coupling part formed at a hollow part formed at the end of the unit rod.
2. The drilling apparatus of claim 1, wherein a stopper is provided on the outer circumferential surface of a top end of the screw coupling part of the driving shaft for preventing the unit rod screw-coupled to the driving shaft from elevating.
3. The drilling apparatus of claim 1, wherein the screw coupling induction part includes a taper part extending from the screw coupling part of the driving shaft to an end of the screw coupling induction part and having diameters gradually decreasing.
4. A drilling apparatus having a head, comprising:
a main body;
a lead supported by the main body of the drilling apparatus;
a driving shaft slidably installed in the lead and having a unit rod connected thereto for performing a drilling work; and
a head having an actuator for driving the driving shaft,
wherein the driving shaft includes a first driving shaft supported on the head body by a bearing and exposed to a bottom end of the head body, and a second driving shaft having a screw coupling part screw-coupled coaxially with the first driving shaft and screw-coupled with an end of the unit rod for performing the drilling work, and a screw coupling inducing part formed at a front end of the screw coupling part to induce screw coupling between the driving shaft and a rod screw coupling part formed at a hollow part formed at the end of the unit rod.
5. The drilling apparatus of claim 4, wherein the first driving shaft includes stepped coupling parts having different diameters, and a plurality of second driving shafts having different diameters to be selectively coupled to the coupling parts of the first driving shaft.
US13/824,848 2010-09-30 2011-09-30 Drilling apparatus having head Abandoned US20130233624A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR10-2010-0095223 2010-09-30
KR20100095223 2010-09-30
KR10-2011-0045376 2011-05-13
KR1020110045376A KR20120033954A (en) 2010-09-30 2011-05-13 Boring machine having head part
PCT/KR2011/007283 WO2012044127A2 (en) 2010-09-30 2011-09-30 Punching device having head part

Publications (1)

Publication Number Publication Date
US20130233624A1 true US20130233624A1 (en) 2013-09-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
US13/824,848 Abandoned US20130233624A1 (en) 2010-09-30 2011-09-30 Drilling apparatus having head

Country Status (8)

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US (1) US20130233624A1 (en)
KR (1) KR20120033954A (en)
CN (1) CN103140643A (en)
AU (1) AU2011308106A1 (en)
BR (1) BR112013007576A2 (en)
CA (1) CA2811779A1 (en)
CL (1) CL2013000824A1 (en)
RU (1) RU2013119901A (en)

Cited By (20)

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US20170370067A1 (en) * 2014-12-12 2017-12-28 Maik Kettner Methods and devices for improving the subsoil
US10167671B2 (en) 2016-01-22 2019-01-01 Weatherford Technology Holdings, Llc Power supply for a top drive
US10247246B2 (en) 2017-03-13 2019-04-02 Weatherford Technology Holdings, Llc Tool coupler with threaded connection for top drive
US10309166B2 (en) 2015-09-08 2019-06-04 Weatherford Technology Holdings, Llc Genset for top drive unit
US10323484B2 (en) 2015-09-04 2019-06-18 Weatherford Technology Holdings, Llc Combined multi-coupler for a top drive and a method for using the same for constructing a wellbore
US10355403B2 (en) 2017-07-21 2019-07-16 Weatherford Technology Holdings, Llc Tool coupler for use with a top drive
US10400512B2 (en) 2007-12-12 2019-09-03 Weatherford Technology Holdings, Llc Method of using a top drive system
US10428602B2 (en) 2015-08-20 2019-10-01 Weatherford Technology Holdings, Llc Top drive torque measurement device
US10443326B2 (en) 2017-03-09 2019-10-15 Weatherford Technology Holdings, Llc Combined multi-coupler
US10465457B2 (en) 2015-08-11 2019-11-05 Weatherford Technology Holdings, Llc Tool detection and alignment for tool installation
US10480247B2 (en) 2017-03-02 2019-11-19 Weatherford Technology Holdings, Llc Combined multi-coupler with rotating fixations for top drive
US10526852B2 (en) 2017-06-19 2020-01-07 Weatherford Technology Holdings, Llc Combined multi-coupler with locking clamp connection for top drive
US10527104B2 (en) 2017-07-21 2020-01-07 Weatherford Technology Holdings, Llc Combined multi-coupler for top drive
US10544631B2 (en) 2017-06-19 2020-01-28 Weatherford Technology Holdings, Llc Combined multi-coupler for top drive
US10590744B2 (en) 2015-09-10 2020-03-17 Weatherford Technology Holdings, Llc Modular connection system for top drive
US10626683B2 (en) 2015-08-11 2020-04-21 Weatherford Technology Holdings, Llc Tool identification
US10704364B2 (en) 2017-02-27 2020-07-07 Weatherford Technology Holdings, Llc Coupler with threaded connection for pipe handler
US10711574B2 (en) 2017-05-26 2020-07-14 Weatherford Technology Holdings, Llc Interchangeable swivel combined multicoupler
US10745978B2 (en) 2017-08-07 2020-08-18 Weatherford Technology Holdings, Llc Downhole tool coupling system
US10954753B2 (en) 2017-02-28 2021-03-23 Weatherford Technology Holdings, Llc Tool coupler with rotating coupling method for top drive

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KR101638178B1 (en) * 2013-09-17 2016-07-08 인석신 Boring machine having suspension unit
KR101684907B1 (en) * 2014-06-18 2016-12-09 인석신 Rod clamping device

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Cited By (23)

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Publication number Priority date Publication date Assignee Title
US10400512B2 (en) 2007-12-12 2019-09-03 Weatherford Technology Holdings, Llc Method of using a top drive system
US10774494B2 (en) * 2014-12-12 2020-09-15 Maik Kettner Methods and devices for improving the subsoil
US20170370067A1 (en) * 2014-12-12 2017-12-28 Maik Kettner Methods and devices for improving the subsoil
US10465457B2 (en) 2015-08-11 2019-11-05 Weatherford Technology Holdings, Llc Tool detection and alignment for tool installation
US10626683B2 (en) 2015-08-11 2020-04-21 Weatherford Technology Holdings, Llc Tool identification
US10428602B2 (en) 2015-08-20 2019-10-01 Weatherford Technology Holdings, Llc Top drive torque measurement device
US10323484B2 (en) 2015-09-04 2019-06-18 Weatherford Technology Holdings, Llc Combined multi-coupler for a top drive and a method for using the same for constructing a wellbore
US10309166B2 (en) 2015-09-08 2019-06-04 Weatherford Technology Holdings, Llc Genset for top drive unit
US10590744B2 (en) 2015-09-10 2020-03-17 Weatherford Technology Holdings, Llc Modular connection system for top drive
US10167671B2 (en) 2016-01-22 2019-01-01 Weatherford Technology Holdings, Llc Power supply for a top drive
US10738535B2 (en) 2016-01-22 2020-08-11 Weatherford Technology Holdings, Llc Power supply for a top drive
US10704364B2 (en) 2017-02-27 2020-07-07 Weatherford Technology Holdings, Llc Coupler with threaded connection for pipe handler
US10954753B2 (en) 2017-02-28 2021-03-23 Weatherford Technology Holdings, Llc Tool coupler with rotating coupling method for top drive
US10480247B2 (en) 2017-03-02 2019-11-19 Weatherford Technology Holdings, Llc Combined multi-coupler with rotating fixations for top drive
US10443326B2 (en) 2017-03-09 2019-10-15 Weatherford Technology Holdings, Llc Combined multi-coupler
US10247246B2 (en) 2017-03-13 2019-04-02 Weatherford Technology Holdings, Llc Tool coupler with threaded connection for top drive
US10837495B2 (en) 2017-03-13 2020-11-17 Weatherford Technology Holdings, Llc Tool coupler with threaded connection for top drive
US10711574B2 (en) 2017-05-26 2020-07-14 Weatherford Technology Holdings, Llc Interchangeable swivel combined multicoupler
US10544631B2 (en) 2017-06-19 2020-01-28 Weatherford Technology Holdings, Llc Combined multi-coupler for top drive
US10526852B2 (en) 2017-06-19 2020-01-07 Weatherford Technology Holdings, Llc Combined multi-coupler with locking clamp connection for top drive
US10355403B2 (en) 2017-07-21 2019-07-16 Weatherford Technology Holdings, Llc Tool coupler for use with a top drive
US10527104B2 (en) 2017-07-21 2020-01-07 Weatherford Technology Holdings, Llc Combined multi-coupler for top drive
US10745978B2 (en) 2017-08-07 2020-08-18 Weatherford Technology Holdings, Llc Downhole tool coupling system

Also Published As

Publication number Publication date
AU2011308106A1 (en) 2013-05-16
CA2811779A1 (en) 2012-04-05
BR112013007576A2 (en) 2016-08-02
KR20120033954A (en) 2012-04-09
CL2013000824A1 (en) 2013-11-15
RU2013119901A (en) 2014-11-10
CN103140643A (en) 2013-06-05

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