EP2868861B1 - Release assembly and method of forming a drilling tool - Google Patents

Release assembly and method of forming a drilling tool Download PDF

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Publication number
EP2868861B1
EP2868861B1 EP13190766.9A EP13190766A EP2868861B1 EP 2868861 B1 EP2868861 B1 EP 2868861B1 EP 13190766 A EP13190766 A EP 13190766A EP 2868861 B1 EP2868861 B1 EP 2868861B1
Authority
EP
European Patent Office
Prior art keywords
release assembly
drilling
counter
drilling tool
joint
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.)
Not-in-force
Application number
EP13190766.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2868861A1 (en
Inventor
Mauri Esko
Markku Keskiniva
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.)
Sandvik Mining and Construction Oy
Original Assignee
Sandvik Mining and Construction Oy
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 Sandvik Mining and Construction Oy filed Critical Sandvik Mining and Construction Oy
Priority to EP13190766.9A priority Critical patent/EP2868861B1/en
Priority to ES13190766T priority patent/ES2706378T3/es
Priority to CA 2864379 priority patent/CA2864379A1/en
Priority to AU2014253519A priority patent/AU2014253519B2/en
Priority to KR1020140147242A priority patent/KR101659658B1/ko
Priority to CL2014002931A priority patent/CL2014002931A1/es
Priority to US14/526,968 priority patent/US20150117940A1/en
Priority to JP2014220155A priority patent/JP5932942B2/ja
Priority to CN201410599071.8A priority patent/CN104594820B/zh
Publication of EP2868861A1 publication Critical patent/EP2868861A1/en
Application granted granted Critical
Publication of EP2868861B1 publication Critical patent/EP2868861B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/30—Auxiliary apparatus, e.g. for thawing, cracking, blowing-up, or other preparatory treatment of the soil
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/042—Threaded
    • 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
    • E21B10/00—Drill bits
    • E21B10/36—Percussion drill bits
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/03—Couplings; joints between drilling rod or pipe and drill motor or surface drive, e.g. between drilling rod and hammer
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/06—Releasing-joints, e.g. safety joints

Definitions

  • the invention relates to a release assembly of a drilling tool used in rock drilling and overburden drilling.
  • the release assembly is intended to be arranged axially between two drilling tool components, which can be connected together at a joint by means of connecting threads.
  • the invention further relates to a use of the release assembly and a method of forming a drilling tool for rock drilling or overburden drilling.
  • drilling machines are used for drilling bore holes into rock surfaces and soil.
  • the drilling machine comprises a rotating device for rotating a drilling tool during drilling.
  • the drilling machine also comprises a percussion device for generating impact pulses to the tool.
  • the drilling tool may be composed of several drilling tool components, which are arranged axially successively and connected to each other by means of connecting threads. Opening of the connecting threads between the drilling components after drilling procedures has proven difficult. The connecting threads have a tendency to get stuck. The stuck joint causes loss of time and money.
  • Document US-3,248,129-A discloses a dual release type safety joint employing two releasable connection means.
  • An object of the invention is to provide a novel and improved arrangement for release of connecting threads between drilling components.
  • a further object is to provide a novel and improved method of forming a drilling tool.
  • the release assembly according to the invention is characterized by the characterized features of independent apparatus claim 1.
  • the method according to the invention is characterized by arranging between the successive drilling tool components a release assembly, which is in accordance with claim 1.
  • a drilling tool is provided with at least one release assembly.
  • the release assembly is arranged at a joint between two successive axial drilling tool components.
  • the release assembly has an axial length.
  • the release assembly comprises a release mechanism, which allows the axial length of the release assembly to shorten when the joint is opened.
  • An advantage of the disclosed solution is that the release assembly provides easy opening of the connection threads between the successive drilling tool components. When the release mechanism shortens in response to the turning in the opening direction, friction forces are decreased and opening is facilitated.
  • the first counter element and a second counter element of the release assembly are counter surfaces, which are facing each other.
  • the release assembly comprises at least one first intermediate component and at least one second intermediate component. Both of the intermediate components comprise counter surfaces facing each other, and contact surfaces facing the drilling components of the joint. Thanks to this embodiment, the release assembly is a separate and independent piece, which may be placed between the connectable drilling components without any modifications to a basic design of the drilling tool components.
  • the release assembly comprises one single intermediate component. Then the intermediate component is provided with the first counter surface and a contact surface. Further, one of the connectable drilling components of the joint is provided with the second counter surface. Thus, the second counter surface is an integrated part of the drilling tool component. This embodiment may be beneficial when the number of components or axial length of the release assembly needs to be minimized, for example.
  • the connecting threads and counter surfaces are opposite in handedness regarding their opening and closing directions.
  • the connecting threads of the joint have a first handedness.
  • the first counter surface and second counter surface are both provided with at least one inclined flank surface having a second handedness opposite to the first handedness of the connecting threads.
  • the release assembly is arranged to be lengthened when the first counter surface and the second counter surface are turned relative to each other in a closing direction of the first handedness, and is arranged to be shortened when turned in an opening direction of the first handedness.
  • the connecting threads are right handed, the flank surfaces are left handed, and vice versa.
  • the connecting threads and the inclined flank surfaces of the counter surfaces are opposite in handedness regarding their opening and closing directions.
  • the connecting threads have a first pitch angle and the inclined flank surfaces have a second pitch angle.
  • the second pitch angle is greater than the first pitch angle. Thanks to this embodiment even rather a small turning motion in the opening direction may decrease tightening force of the flank surfaces and generate needed axial shortening.
  • the second pitch angle should be less than fivefold relative to the first pitch angle. This way, unintended opening of the release assembly may be avoided due to the influence of dynamic forces during the use of the drilling tool.
  • the second pitch angle of the inclined flank surfaces is 2 to 3 fold relative to the first pitch angle of the connecting threads. This embodiment has shown to be usable when tested in practice.
  • the second pitch angle of the inclined flank surfaces is smaller than the first pitch angle of the connecting threads.
  • the first counter surface is provided with one or more first transverse surfaces and the second counter surface is provided with one or more second transverse surfaces.
  • the transverse surfaces are transverse relative to the inclined flank surfaces.
  • the transverse surfaces may be in axial direction, perpendicular to the flank surfaces or in a desired angular direction.
  • the first transverse surface is facing the second transverse surface and one or more flexible member is arranged between them.
  • the flexible member occupies a distance between the transverse surfaces.
  • the flexible member prevents the transverse surfaces from being positioned in contact with each other. In other words, the flexible member allows the counter elements or surfaces to be turned in their opening direction relative to each other.
  • the above mentioned flexible member is made of one or more resilient materials, such as rubber or elastic polymer.
  • the resilient material may be temporarily compressed or reshaped.
  • the above mentioned flexible member is a separate element, which is installed between the transverse surfaces facing each other.
  • the separately manufactured flexible member is easy to place between the transverse surfaces and it can be changed later if need be.
  • the separate flexible member may be a rubber piece.
  • one or both of the opposing transverse surfaces are covered by a resilient material, which serves as the flexible member. Between the transverse surfaces there may be a space filled with the resilient material. Alternatively, the faces of the transverse surfaces may be coated with the resilient material.
  • the resilient material may be rubber or rubber -like material. Some polymers, such as polyurethane PU, are also suitable for the purpose.
  • the flexible member is prearranged or integrated in the release assembly, thus allowing easy and fast mounting of the release assembly.
  • the transverse surfaces are held at a distance from each other by means of one or more spring members.
  • the spring member When the release assembly is turned towards the opening direction, then the spring member will compress and allow the release assembly to be shortened in the axial direction. In some situations it may be more convenient to use the spring member as a flexible member instead of the above mentioned resilient material.
  • the contact surface of the intermediate component is provided with one or more friction zones having an intentionally increased friction coefficient.
  • the friction zone may be provided with intentionally increased surface roughness.
  • the friction zone may comprise a knurling, for example.
  • the friction zone may be covered with friction material having a greater friction coefficient compared to the basic material of the intermediate component.
  • the contact surface may have one or several smaller friction zones, and one or more additional zones without the disclosed feature, or alternatively, the entire contact surface is treated for obtaining the increased friction coefficient for the entire area.
  • the idea of the friction zone is to prevent unintentional opening of the connecting threads by increasing friction forces between the intermediate component and the connectable drilling tool component.
  • the contact surface of the intermediate component has a tapered shape. Thanks to the tapered shape, contact area between the intermediate piece and the connectable drilling tool component may be increased.
  • the intermediate component may comprise the tapered contact surface on an outer periphery, or alternatively on an inner periphery of the intermediate component.
  • the intermediate component has an outer periphery and an inner periphery, which both comprise one or more curved surfaces.
  • the outer periphery and the inner periphery may both have closed form.
  • the intermediate component has a ring shaped configuration, whereby it has an outer circumference and an inner circumference.
  • the intermediate component may have a circular or elliptical shape, for example.
  • the intermediate component is formed of two or more separate pieces.
  • the intermediate component may be sleeve like piece which is formed of two halves, for example.
  • the counter surface of the intermediate component is formed of two or more separate pieces.
  • the intermediate piece may be provided with several counter pieces mounted in recesses on the counter surface.
  • the release assembly is intended to be used in a down-the-hole drilling (DTH). Then the release assembly is arranged between a drill bit assembly and a down-the-hole percussion device.
  • the drill bit assembly comprises a drill bit and fastening members for fastening the drill bit.
  • the down-the-hole percussion device is also known as a DTH - hammer.
  • the release assembly is used in the DTH -drilling.
  • the release assembly is arranged between a locking nut of the drill bit assembly and the DTH -hammer.
  • the locking nut is also known as a driver sub.
  • the release assembly is intended to be used in an extension drilling. Then the release assembly is arranged between two successive drilling tool components.
  • the drilling tool component may be a drill bit, a drill rod or a drill pipe, for example.
  • the release assembly is intended to be used in a rotary drilling. Then the release assembly is located between rotating unit and a drill bit. Between the rotating unit and the drill bit there may be one or more drill tubes or rods provided with connecting threads.
  • the release assembly is intended to be used in a top-hammer drilling. Then the release assembly is located between a drilling machine and a drill bit, which are located at opposite ends of the drilling equipment. Between the drilling machine and the drill bit there may be one or more drill tubes or rods provided with connecting threads.
  • FIG. 1 shows a rock drilling rig 1, comprising a rock drilling unit 2 which may be connected by means of a boom 3 to a movable carrier 4.
  • the drilling unit 2 may comprise a feed beam 5 and a rock drilling machine 6 supported on it.
  • the rock drilling machine 6 may be moved on the feed beam 5 by means of a feed device 7.
  • the rock drilling machine 6 comprises a shank 8 at a front end of the rock drilling machine 6 for connecting a tool 9.
  • the tool 9 may comprise one or more drill rods 10 and a drill bit 11 located at a distal end of the tool 9.
  • the rock drilling machine 6 further comprises a rotating device 12 for rotating the shank 8 and the tool 9 connected to the shank 8.
  • the rock drilling machine 6 may also comprise an impact device or percussion device 13 for generating impact pulses to the tool 9.
  • the rock drilling machine 6 is provided with the percussion device 13, which is located on an opposite end of the tool 9 as compared to the drill bit 11, the drilling is known as top-hammer drilling.
  • the tool 9, the drill rods 10 of the tool and the drill bit 11 are drilling tool components 14, which are arranged axially and consecutively. Between the consecutive drilling tool components 14 are joints 15 for interconnecting the components.
  • the joint 15 may comprise connecting threads allowing mounting and dismounting of the joint by screwing the drilling tool components 14 relative to each other around the centre line of the tool 9.
  • the front end of the tool 9 may be connected to the shank 8 by means of a joint 15 comprising connecting threads.
  • the connecting threads of the joints 15 may stuck, wherefore the joints 15 may be provided with a release assembly described in this application.
  • one or more drill holes 16 are drilled with the drilling unit 2.
  • the drill holes 16 may be drilled in a vertical direction, as is shown in Figure 1 , or alternatively, in a horizontal direction or in an angular direction.
  • the drill holes 16 may be drilled to a rock material or soil.
  • Figure 2 shows a drilling unit 2 for DTH -drilling.
  • the drilling unit 2 differs from the one in Figure 1 in such a way that the percussion device 41 is at the opposite end of the tool 9 in relation to the rotating device 12 or rotation unit.
  • the percussion device 41 is in the drill hole 16, and the drill bit 11 may be connected directly to the percussion device 41.
  • the drill bit 11 or a drill bit assembly may be connected to the percussion device 13 by means of a locking nut 37, known also as a driver sub.
  • the tool 9 may comprise one or more drill rods 10 or tubes, which may be connected consecutively by means on joints 15 provided with connecting threads.
  • the rear end of the tool 9 may be connected to the shank 8 by means of a joint 15 also comprising connecting threads.
  • a joint 15 also comprising connecting threads.
  • the connecting threads of the joints 15 may stuck, wherefore the joints 15 may be provided with a release assembly described in this application.
  • the tool, the extension drill tubes, the drill bit assembly and the percussion piston are all drilling tool components 14, which are arranged axially and one after the other and are used during drilling. Between the consecutive drilling tool components 14 are joints 15 for connecting the components to each other.
  • Figure 3 discloses a release assembly 18 in a simplified manner.
  • the release assembly 18 is arranged in a joint 15 between two consecutive axial drilling tool components 14a and 14b, which are in this particular example a drill tube 10 and a drill bit 11 provided with a fastening part 19.
  • An outer surface of the fastening part 19 is provided with outer connecting threads 20 and the drill tube 10 is provided with inner connecting threads 21.
  • the connecting threads 20, 21 match to each other and they have a first pitch angle P1.
  • the release assembly 18 may comprise a first intermediate component 22a and a second intermediate component 22b, which are separate from the drilling tool components 14a, 14b.
  • the intermediate components 22a, 22b have contact surfaces 24 facing the drilling tool components 14.
  • the intermediate components 22a, 22b comprise counter elements facing towards each other and comprising a release mechanism 25 allowing an initial axial length L1 to be shortened in response to turning the connecting threads 20, 21 of the joint 15 in an opening direction Ro.
  • the shortened axial length L2 after execution of the release mechanism 25 is shown in Figure 3 , too.
  • a closing direction Rc is also indicated in the Figure.
  • the counter elements of the release mechanism 25 are a first counter surface 26 and a second counter surface 27, which are facing each other.
  • the first counter surface 26 and the second counter surface 27 are both provided with one or more inclined flank surfaces.
  • the connecting threads 20, 21 have a first handedness and the inclined flank surfaces of the counter surfaces 27, 28 have a second handedness. When the connecting threads are right-handed, the inclined flank surfaces are left-handed, and vice versa.
  • the inclined flank surfaces of the counter surfaces 26, 27 have a second pitch angle P2.
  • the second pitch angle P2 is greater than the first pitch angle P1 of the connecting threads 20, 21, as is clearly shown in Figure 3 .
  • the first counter surface 26 may comprise a first transverse surface 28 and the second counter surface 27 may comprise a second transverse surface 29, which are facing each other.
  • the transverse surfaces 28, 29 define a space 30 inside which is arranged a flexible member 31.
  • the flexible member 31 occupies a distance D1 between the transverse surfaces 28, 29.
  • the flexible member 31 allows the relative movement of the intermediate components 22a, 22b towards the opening direction Ro.
  • the flexible member 31 may be a separate piece arranged in the space 30.
  • the flexible member may be a rubber piece, for example.
  • intermediate components 22a, 22b may be sleeve-like pieces having an outer diameter 32 and an inner diameter 33.
  • An additional embodiment may comprise only one intermediate component 22a or 22b since one of the drill tool components 14a or 14b may have an integrated counter surface 26 or 27.
  • the release assembly 18 is turned towards the opening direction Ro whereby the transverse surfaces 28 and 29 are moved towards each other and the space 31 occupied by the flexible member 30 has a decreased distance D2.
  • the flexible member 31 may change its shape or may compress, depending on the structure and material used.
  • the flexible member 31 is flattened allowing the relative movement of the intermediate components 22a, 22b and shortening Ls of length of the release assembly 18.
  • the initial position of the first transverse surface 28 is shown in dotted lines.
  • the flexible member 31 of the release assembly 18 is a spring arranged in the space 30.
  • the spring may be a spiral spring, for example.
  • the flexible member 31 is a flexible material cast, injected or otherwise arranged in the space 30.
  • the flexible material filling the space 30 may be polyurethane, for example.
  • the flexible material may combine the transverse surfaces 28, 29 together, whereby the intermediate components 22a, 22b are connected to form one uniform object.
  • Figure 6 further differs from the solutions disclosed in Figures 3 - 5 in that the inclined flank surfaces of the counter surfaces 26, 27 are opposite in handedness.
  • the handedness of the inclined flank surfaces may be designed according to the handedness of the connecting threads. The handedness is shown in Figures of this application only by way of example. The handedness of the release assembly 18 has no effect on other features shown in the Figures.
  • Figure 7a shows that the intermediate component 22 may comprise several inclined flank surfaces and transverse surfaces 29 in the counter surface 27.
  • the counter surface 27 is divided into four sections, but the number of sections may be 2 or 3, or more than 4.
  • the intermediate component 22 is formed of two halves 23a and 23b. It is also possible to form the intermediate component of even more than two pieces.
  • Figure 7b further shows that the transverse surfaces 29 may be coated with a flexible material, whereby the flexible member 31 is integrated to the intermediate component.
  • Figure 7c further shows that the intermediate component 22 may have a form different from a basic sleeve.
  • the intermediate component 23 may have a slot 32, whereby the outer periphery is not closed.
  • the outer surface of the release assembly 18 needs not to be circular but may have any suitable form.
  • Figures 8a and 8b show that the contact surface 24 of the intermediate component 22 may comprise one or more friction zones 33, which all have an increased friction coefficient compared to a friction coefficient of the basic material of the intermediate component.
  • the friction zone 33 may comprise a knurling or other surface treatment, or alternatively, it may comprise a coating.
  • Figure 9 shows a release assembly 18 arranged in a joint 15 between two drill rods or tubes of an extension drilling tool.
  • the first drill tool component 14a may have a shoulder 34 against which the release assembly 18 is arranged.
  • Figure 10 shows an alternative embodiment of the solution of Figure 9 .
  • the release assembly 18 comprises only one intermediate component 22b since the first counter surface 26 and the first transverse surface 28 are integrated to an end face of the first drilling tool component 14a.
  • Figure 11 shows a joint 15 wherein the second drill tool component 22b comprises a connecting sleeve 35.
  • the release assembly 18 may be located at the bottom of the connecting sleeve 35.
  • Figures 9 - 11 may relate to top-hammer solutions, where the connecting threads are typically left-handed wherefore the inclined surfaces of the release assembly 18 are right-handed.
  • Figure 12 discloses a drilling tool assembly 36 comprising a drill bit 11 and a locking nut 37.
  • the drill bit 11 may comprise a fastening part 19 around which a fastening portion 38 of the locking nut 37 may be arranged.
  • the fastening portion 38 is provided with connecting threads 20.
  • the locking nut 37 may further comprise a gripping portion 39.
  • At a distal end of the fastening part 19 of the drill bit 11 is an impact surface 40 for receiving impact pulses.
  • the fastening part 19 may slide axially relative to the locking nut 37 during the operation of the percussion device 41.
  • Figure 13 shows that a release assembly 18 may be placed between a down-the-hole percussion device 41 and a drilling tool assembly 36.
  • the DTH percussion device 41 comprises a percussion piston 42 arranged to strike the impact surface 40 of the drilling tool assembly 36.
  • the connecting threads 20 of the drilling tool assembly 36 are connected to connecting threads provided on an inner surface of the percussion device 41.
  • the release assembly 18 allows easy opening of the connecting threads according to the principles described above in this application.
  • the release assembly 18 is located in an alternative position as compared to the solution of Figure 13 .
  • the release assembly 18 is inside the percussion device 41 between a retaining element 43 and an end surface 44 of the fastening portion 38 of the locking nut 37.
  • the release assembly 18 has a bottom contact with the drilling tool components 14a, 14b of the joint 15, whereas in Figure 13 a shoulder contact is applied.
  • the second intermediate component 22b of the release assembly 18 may be an integrated part of the locking nut 37. Then an upper surface of the gripping portion 39 may comprise elements needed for acting as a part of the release mechanism.
  • Figure 15 shows a joint 15, which has almost the same features as shown in the solution of Figure 13 .
  • the second intermediate component 22b of the release assembly 18 has a tapered contact surface 24t against the gripping part 39 of the locking nut 37.
  • the contact surface 24 of the first intermediate component 22a may also have a tapered shape.
  • the corresponding surfaces of the drilling tool components 14a, 14b facing the release assembly need to be tapered too.
  • Figures 12 - 15 relate to DTH -hammer solutions, where the connecting threads are typically right-handed wherefore the inclined surfaces of the release assembly 18 are left-handed.
  • Figures 16a - 16c show basic principles of alternative release assemblies 18, which are not in accordance with the present invention.
  • the Figures are greatly simplified.
  • one or more release elements 45 are arranged between intermediate components 22a, 22b.
  • the release element 45 may be connected to the intermediate components 22a, 22b by means of joints 46 allowing the release element 45 to turn when the connected drilling tool components 14a, 14b are turned in the opening direction Ro. Then the release element 45 may turn towards a situation shown by dotted lines and may cause the initial axial length of the release assembly 18 to shorten as indicated by an arrow Ls.
  • Figures 16b and 16c show embodiments wherein one of the two intermediate components 22a, 22b is integrated as a part of the drilling tool component 14a, 14b.
  • Figure 17 discloses a detail of an alternative release mechanism of a release assembly 18, which is not in accordance with the present invention.
  • a first counter element or surface 47 may be provided with one or more projecting parts 48 and a second counter element or surface 49 may be provided with one or more recesses 50, cavities or slots.
  • the projecting part 48 and the recess 50 move towards each other and finally the projecting part 48a may locate in the recess 50. Then an axial length of the release assembly is shortened, as indicated by an arrow Ls.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)
EP13190766.9A 2013-10-30 2013-10-30 Release assembly and method of forming a drilling tool Not-in-force EP2868861B1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP13190766.9A EP2868861B1 (en) 2013-10-30 2013-10-30 Release assembly and method of forming a drilling tool
ES13190766T ES2706378T3 (es) 2013-10-30 2013-10-30 Conjunto de desconexión y método para conformar una herramienta de perforación
CA 2864379 CA2864379A1 (en) 2013-10-30 2014-09-22 Release assembly and method of forming drilling tool
AU2014253519A AU2014253519B2 (en) 2013-10-30 2014-10-23 Release assembly and method of forming drilling tool
KR1020140147242A KR101659658B1 (ko) 2013-10-30 2014-10-28 릴리즈 조립체 및 드릴 공구를 형성하는 방법
CL2014002931A CL2014002931A1 (es) 2013-10-30 2014-10-29 Un montaje de liberación de una herramienta de perforación para roca y perforacion de sobrecarga, donde el montaje de liberación está dispuesto axialmente entre dos componentes de herramienta de perforación conectables en una union por medio de hilos conectores; el montaje de liberación comprende un primer elemento contrario y un segundo elemento contrario, el primer elemento contrario y el segundo elemento contrario son superficies contrarias, que se enfrentan entre si.
US14/526,968 US20150117940A1 (en) 2013-10-30 2014-10-29 Release assembly and method of forming drilling tool
JP2014220155A JP5932942B2 (ja) 2013-10-30 2014-10-29 分離用アセンブリ及び掘削ツールの形成方法
CN201410599071.8A CN104594820B (zh) 2013-10-30 2014-10-30 释放组件和形成钻凿工具的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13190766.9A EP2868861B1 (en) 2013-10-30 2013-10-30 Release assembly and method of forming a drilling tool

Publications (2)

Publication Number Publication Date
EP2868861A1 EP2868861A1 (en) 2015-05-06
EP2868861B1 true EP2868861B1 (en) 2018-10-17

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Application Number Title Priority Date Filing Date
EP13190766.9A Not-in-force EP2868861B1 (en) 2013-10-30 2013-10-30 Release assembly and method of forming a drilling tool

Country Status (8)

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US (1) US20150117940A1 (ko)
EP (1) EP2868861B1 (ko)
JP (1) JP5932942B2 (ko)
KR (1) KR101659658B1 (ko)
AU (1) AU2014253519B2 (ko)
CA (1) CA2864379A1 (ko)
CL (1) CL2014002931A1 (ko)
ES (1) ES2706378T3 (ko)

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Publication number Priority date Publication date Assignee Title
CN107299827B (zh) * 2016-04-15 2023-07-04 贵州航天凯山石油仪器有限公司 一种井下丢手方法及装置
IES20160109A2 (en) 2016-04-22 2017-08-09 Mincon Int Ltd Release assembly for percussion drill tools
CN112982535B (zh) * 2021-02-22 2023-01-20 广东建宏重工科技有限公司 一种应用于液压破碎锤的新型钎杆

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CA2864379A1 (en) 2015-04-30
AU2014253519B2 (en) 2016-05-19
KR20150050417A (ko) 2015-05-08
AU2014253519A1 (en) 2015-05-14
ES2706378T3 (es) 2019-03-28
JP5932942B2 (ja) 2016-06-08
JP2015086693A (ja) 2015-05-07
CL2014002931A1 (es) 2015-06-12
EP2868861A1 (en) 2015-05-06
CN104594820A (zh) 2015-05-06
US20150117940A1 (en) 2015-04-30
KR101659658B1 (ko) 2016-09-26

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