WO2011055001A1 - Method for coupling of a casing tube to a drill bit - Google Patents

Method for coupling of a casing tube to a drill bit Download PDF

Info

Publication number
WO2011055001A1
WO2011055001A1 PCT/FI2010/000068 FI2010000068W WO2011055001A1 WO 2011055001 A1 WO2011055001 A1 WO 2011055001A1 FI 2010000068 W FI2010000068 W FI 2010000068W WO 2011055001 A1 WO2011055001 A1 WO 2011055001A1
Authority
WO
WIPO (PCT)
Prior art keywords
bit
groove
connection ring
ring
casing tube
Prior art date
Application number
PCT/FI2010/000068
Other languages
French (fr)
Inventor
Juhani VÄLISALO
Original Assignee
Pirkan Laatupalvelu 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 Pirkan Laatupalvelu Oy filed Critical Pirkan Laatupalvelu Oy
Priority to US13/508,618 priority Critical patent/US20120227985A1/en
Priority to EP10827950.6A priority patent/EP2499325B1/en
Priority to CA2779648A priority patent/CA2779648A1/en
Priority to KR1020127014913A priority patent/KR101749914B1/en
Publication of WO2011055001A1 publication Critical patent/WO2011055001A1/en

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
    • 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
    • E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
    • 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
    • E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
    • E21B17/076—Telescoping joints for varying drill string lengths; Shock absorbers between rod or pipe and drill bit
    • 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
    • E21B17/14—Casing shoes for the protection of the bottom of the casing
    • 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
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes

Definitions

  • Invention relates to a method for coupling of a casing tube to a drill bit in which method an annular groove that circulates around the outer track is formed to the outer track of the bit and a drill shoe, such as a connection ring that can be installed around the bit, is used as an aid in order to connect the casing tube to the bit at its front edge which connection ring is attached both to the mentioned annular groove and on the other hand to the mentioned casing tube in which case at the first stage of the installation a chopped ring element is pushed at least partly into the groove located at the outer track of the bit.
  • the disadvantage of this method is the fact that the bit comes loose from the connection ring when the ring element in certain circumstances has a chance to come out from between the parts.
  • the bit is transported with the connection ring and is stored.
  • the welding of the casing tube which welding locks the ring element can occur only after a long time.
  • the ring element becomes locked between the bit and the connection ring immediately when it is being installed and the disadvantage occurring in the previously known solutions does not occur again. It is characteristic of the method according to the invention that at the second stage analogously
  • connection ring is pushed around the bit so far that the ring element located in the groove becomes strained at the same time into the groove existing at the inner surface of the connection ring in which case when one moves the connection ring, the ring element follows in the groove along the connection ring and slides in the groove of the bit in such a way that its movement to the deepest part of the groove is prevented by adding a stopper that restricts the movement of the connection ring to the structure, or - the ring element is installed into the groove of the bit when the connection ring is being drawn back on top of the bit and in front of it at least partly away from the location of the groove after which the connection ring is moved on top of the bit backwards and a locking piece is welded in order to restrict the axial slip of the connection ring.
  • connection ring or the drill shoe stays by the bit when the bit is being handled and also when it is attached to the drilling equipment when the drilling starts with that bit. Restriction of movement to be made for the connection ring is easy to create by welding only for example a little piece of metal or some pieces of metal to a location suitable for the purpose.
  • Figure 1 shows a ring element in the groove of the bit.
  • Figure 2 shows a push of a connection ring on top of the bit.
  • Figure 3 shows the final stage of the push of the connection ring in which the ring element is located into two opposite grooves.
  • Figure 4 shows the distance of movement of the connection ring when the distance of movement is limited.
  • Figure 5 shows the distance of movement of the connection ring when the distance of movement is limited in another way.
  • Figure 6 shows another sturucture of the connection ring.
  • the chopped ring element 3 that is located into the groove 6 existing at the outer surface of the bit 1.
  • the groove 6 comprises a flat base part and a deep point into which the ring element 3 is located in the figure.
  • the chopped ring element 3 has been chosen to become strained a little bit outwards in which case it does not become strained to the bottom of the deepest point of the groove 6.
  • connection ring 2 In the figure 2 the pushing of the connection ring 2 on top of the bit 1 is shown. There is a bevel at the front edge of the connection ring 2 which bevel pushes the ring element 3 to the bottom of the groove 6 to the deepest point in which case the connection ring 2 can move to the left on top of the bit.
  • the groove 5 of the connection ring 2 is about to move to the location of the ring element.
  • connection ring 2 In the figure 4 a situation is shown in which situation the movement of the connection ring 2 is limited with a help of a piece of metal 7 that is welded to it in such a way that it can move in axial direction only as far as the ring element 3 can move on the flat base part of the groove 6.
  • a casing pipe 4 that is already welded to the connection ring 2 is shown.
  • the ring element 3 In the situation of the figure 4 the ring element 3 cannot move to the deepest part of the groove 6 in which case the reciprocal interlocking of the bit and the connection ring cannot come loose either.
  • Figure 5 shows another solution in which the restriction of the movement of the connection ring 2 is made with a help of a piece which piece is welded to the rear end of the connection ring before the welding of the casing pipe 4.
  • the limiting piece can be welded to the bit 2 or to the casing pipe 4, too.
  • connection ring 2 With a little changed structure.
  • the piece 8 has not yet been attached to the ring 2.
  • the installation is easiest to do when the bit 1 rests on a base supported by spikes, that is it rests on its drilling surface.
  • the connection ring 2 is installed on top of the bit 1 and is let to drop down against the bit shoulder. After that the ring element 3 is simply dropped into the groove 6 between the bit 1 and the connection ring 2 because the connection ring 2 is drawn back at least partly at the location of the groove 6.
  • connection ring 2 is lifted a little bit upwards to the position of the figure 6 in which case the locking piece 8 can be welded with a welding 9 to the connection ring 2 in order to limit its movement towards the clamp contact area of the bit 2.
  • the groove 6 of the bit 2 has a flat base.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (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)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

Method for connecting a casing tube (4) to a drill bit (1) in which method an annular groove (6) that circulates around the outer track is formed at the outer track of the bit (1) and in order to connect the casing tube (4) to the bit (1 ) at its front edge, one uses a drill shoe, such as a connection ring (2), as an aid which drill shoe can be installed around the bit (1) and which connection ring is attached both to the mentioned annular groove (6) and on the other hand to the mentioned casing tube (4) in which case at the first stage of the installation a chopped ring element (3) is installed into the groove (6) located at the outer track of the bit (1) at least partly. At the second stage the connection ring (2) is pushed around the bit (1) so far that the ring element (3) existing in the groove (6) becomes strained at the same time into the groove (5) existing at the inner surface of the connection ring (2) in which case when the connection ring (2) is being moved, the ring element (3) follows in the groove (5) along the connection ring and slides in the groove (6) of the bit ( 1 ) in such a way that its movement to the deepest point of the groove (6) is prohibited by adding a stopper (7), (8) to the structure which stopper restricts the movement of the connection ring (2).

Description

Method for Coupling of a Casing Tube to a Drill Bit
Invention relates to a method for coupling of a casing tube to a drill bit in which method an annular groove that circulates around the outer track is formed to the outer track of the bit and a drill shoe, such as a connection ring that can be installed around the bit, is used as an aid in order to connect the casing tube to the bit at its front edge which connection ring is attached both to the mentioned annular groove and on the other hand to the mentioned casing tube in which case at the first stage of the installation a chopped ring element is pushed at least partly into the groove located at the outer track of the bit.
Previously a method according to the above mentioned introduction is known from a Finnish patent publication Nr. 115787 in which publication the chopped ring element is located between the bit and the connection ring, such as drill shoe, into the grooves existing in the mentioned parts in order to lock these parts to each other. The staying of the ring element between the mentioned parts is ensured later not until the casing tube is welded to the connection ring.
The disadvantage of this method is the fact that the bit comes loose from the connection ring when the ring element in certain circumstances has a chance to come out from between the parts. The bit is transported with the connection ring and is stored. The welding of the casing tube which welding locks the ring element can occur only after a long time. With the method according to the invention the ring element becomes locked between the bit and the connection ring immediately when it is being installed and the disadvantage occurring in the previously known solutions does not occur again. It is characteristic of the method according to the invention that at the second stage analogously
- either a connection ring is pushed around the bit so far that the ring element located in the groove becomes strained at the same time into the groove existing at the inner surface of the connection ring in which case when one moves the connection ring, the ring element follows in the groove along the connection ring and slides in the groove of the bit in such a way that its movement to the deepest part of the groove is prevented by adding a stopper that restricts the movement of the connection ring to the structure, or - the ring element is installed into the groove of the bit when the connection ring is being drawn back on top of the bit and in front of it at least partly away from the location of the groove after which the connection ring is moved on top of the bit backwards and a locking piece is welded in order to restrict the axial slip of the connection ring.
The advantage of the invention is the fact that the connection ring or the drill shoe stays by the bit when the bit is being handled and also when it is attached to the drilling equipment when the drilling starts with that bit. Restriction of movement to be made for the connection ring is easy to create by welding only for example a little piece of metal or some pieces of metal to a location suitable for the purpose.
In the following the invention is described more detailed by referring to the accompanying drawing in which
Figure 1 shows a ring element in the groove of the bit.
Figure 2 shows a push of a connection ring on top of the bit.
Figure 3 shows the final stage of the push of the connection ring in which the ring element is located into two opposite grooves.
Figure 4 shows the distance of movement of the connection ring when the distance of movement is limited.
Figure 5 shows the distance of movement of the connection ring when the distance of movement is limited in another way.
Figure 6 shows another sturucture of the connection ring. In the figure 1 there is the chopped ring element 3 that is located into the groove 6 existing at the outer surface of the bit 1. The groove 6 comprises a flat base part and a deep point into which the ring element 3 is located in the figure. The chopped ring element 3 has been chosen to become strained a little bit outwards in which case it does not become strained to the bottom of the deepest point of the groove 6.
In the figure 2 the pushing of the connection ring 2 on top of the bit 1 is shown. There is a bevel at the front edge of the connection ring 2 which bevel pushes the ring element 3 to the bottom of the groove 6 to the deepest point in which case the connection ring 2 can move to the left on top of the bit. The groove 5 of the connection ring 2 is about to move to the location of the ring element.
In the figure 3 there is a situation where the deepest point of the groove 6 of the bit 2 and the groove 5 of the connection ring 2 are together and the ring element 3 can in turn become strained into the groove 5 of the connection ring 2. When the connection ring 2 is now being pulled back away from the top of the bit, it can move as far as the ring element 3 moves to the other edge of the groove 6. The ring element 3 follows in the groove 5 of the connection ring.
In the figure 4 a situation is shown in which situation the movement of the connection ring 2 is limited with a help of a piece of metal 7 that is welded to it in such a way that it can move in axial direction only as far as the ring element 3 can move on the flat base part of the groove 6. In the figure 4 also a casing pipe 4 that is already welded to the connection ring 2 is shown. In the situation of the figure 4 the ring element 3 cannot move to the deepest part of the groove 6 in which case the reciprocal interlocking of the bit and the connection ring cannot come loose either.
Figure 5 shows another solution in which the restriction of the movement of the connection ring 2 is made with a help of a piece which piece is welded to the rear end of the connection ring before the welding of the casing pipe 4. The limiting piece can be welded to the bit 2 or to the casing pipe 4, too.
In the figure 6 there is a connection ring 2 with a little changed structure. During the installation the piece 8 has not yet been attached to the ring 2. The installation is easiest to do when the bit 1 rests on a base supported by spikes, that is it rests on its drilling surface. First the connection ring 2 is installed on top of the bit 1 and is let to drop down against the bit shoulder. After that the ring element 3 is simply dropped into the groove 6 between the bit 1 and the connection ring 2 because the connection ring 2 is drawn back at least partly at the location of the groove 6. After that the connection ring 2 is lifted a little bit upwards to the position of the figure 6 in which case the locking piece 8 can be welded with a welding 9 to the connection ring 2 in order to limit its movement towards the clamp contact area of the bit 2. In this solution the groove 6 of the bit 2 has a flat base.

Claims

1. Method for connecting a casing tube (4) to a drill bit (1) in which method an annular groove (6) that circulates around the outer track is formed at the outer track of the bit (1) and in order to connect the casing tube (4) to the bit (1 ) at its front edge, one uses a drill shoe, such as a connection ring (2), as an aid which drill shoe can be installed around the bit (1) and which connection ring is attached both to the mentioned annular groove (6) and on the other hand to the mentioned casing tube (4) in which case at the first stage of the installation either
- a chopped ring element (3) is installed into the groove (6) located at the outer track of the bit (1) at least partly or
- the connection ring (2) is installed on top of the ring bit (2) to the destination point characterized in that at the second stage analogously either
- the connection ring (2) is pushed around the bit (1 ) so far that the ring element (3) existing in the groove (6) becomes strained at the same time into the groove (5) existing at the inner surface of the connection ring (2) in which case when the connection ring (2) is being moved, the ring element (3) follows in the groove (5) along the connection ring and slides in the groove (6) of the bit (1) in such a way that its movement to the deepest point of the groove (6) is prohibited by adding a stopper (7), (8) to the structure which stopper restricts the movement of the connection ring (2) or
- the ring element (3) is installed into the groove (6) of the bit (2) when the connection ring (2) is being drawn back on top of the bit in front of it at least partly away from the location of the groove (6) after which the connection ring (2) is moved on top of the bit backwards and a locking piece (8) is welded to restrict the axial movement of the connection ring (2).
2. Method according to the claim 1, characterized in that a ring that becomes strained outwards from the groove (6) towards the larger diameter measurement is used as a ring element (3).
3. Method according to the claim 1, characterized in that a flat base part is formed into the groove (6) existing on the surface of the bit (1) covering the distance that is allowed to be the axial movement of the connection ring (2) and the ring element (3).
4. Method according to the claim 3, characterized in that during installation stoppers (7), (8) are welded to their locations.
PCT/FI2010/000068 2009-11-09 2010-11-09 Method for coupling of a casing tube to a drill bit WO2011055001A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US13/508,618 US20120227985A1 (en) 2009-11-09 2010-11-09 Method for coupling of a casing tube to a drill bit
EP10827950.6A EP2499325B1 (en) 2009-11-09 2010-11-09 Method for coupling of a casing tube to a drill bit
CA2779648A CA2779648A1 (en) 2009-11-09 2010-11-09 Method for coupling of a casing tube to a drill bit
KR1020127014913A KR101749914B1 (en) 2009-11-09 2010-11-09 Method for coupling of a casing tube to a drill bit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20090415A FI122434B (en) 2009-11-09 2009-11-09 Method of connecting a protective tube to a drill bit
FI20090415 2009-11-09

Publications (1)

Publication Number Publication Date
WO2011055001A1 true WO2011055001A1 (en) 2011-05-12

Family

ID=41395143

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2010/000068 WO2011055001A1 (en) 2009-11-09 2010-11-09 Method for coupling of a casing tube to a drill bit

Country Status (6)

Country Link
US (1) US20120227985A1 (en)
EP (1) EP2499325B1 (en)
KR (1) KR101749914B1 (en)
CA (1) CA2779648A1 (en)
FI (1) FI122434B (en)
WO (1) WO2011055001A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2012349363B2 (en) * 2011-12-09 2015-09-03 Mitsubishi Materials Corporation Excavating tool

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10487595B2 (en) * 2016-06-30 2019-11-26 The Charles Machine Works, Inc. Collar with stepped retaining ring groove
US10760354B2 (en) * 2016-06-30 2020-09-01 The Charles Machine Works, Inc. Collar with stepped retaining ring groove

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996015349A1 (en) 1994-11-11 1996-05-23 Ilomaeki Valto A method to drill a hole with a hammer, the hammer and a joint between hammer and drill bit holder
US20040104050A1 (en) * 2001-04-04 2004-06-03 Jaervelae Jorma Method for drilling and drilling apparatus
FI115787B (en) 2002-03-15 2005-07-15 Rd Trenchless Ltd Oy Method of connecting the protective tube to the drill bit and the corresponding joint

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136982A (en) * 1977-10-04 1979-01-30 General Motors Corporation Centered fastener assembly
DE4207839C2 (en) * 1992-03-12 1993-12-16 Loehr & Bromkamp Gmbh Hub attachment
WO1995034740A1 (en) * 1994-06-10 1995-12-21 Ilomaeki Valto Drilling apparatus
DE29501158U1 (en) * 1995-01-25 1995-03-30 Electrolux Corporate Patents & Locking device for a drive shaft
DE10015911B4 (en) * 2000-03-30 2006-06-29 Zf Sachs Ag Axial securing of two components with a retaining ring

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996015349A1 (en) 1994-11-11 1996-05-23 Ilomaeki Valto A method to drill a hole with a hammer, the hammer and a joint between hammer and drill bit holder
US20040104050A1 (en) * 2001-04-04 2004-06-03 Jaervelae Jorma Method for drilling and drilling apparatus
FI115787B (en) 2002-03-15 2005-07-15 Rd Trenchless Ltd Oy Method of connecting the protective tube to the drill bit and the corresponding joint

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2499325A4

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2012349363B2 (en) * 2011-12-09 2015-09-03 Mitsubishi Materials Corporation Excavating tool
US9428964B2 (en) 2011-12-09 2016-08-30 Mitsubishi Materials Corporation Excavating tool

Also Published As

Publication number Publication date
CA2779648A1 (en) 2011-05-12
KR20120095961A (en) 2012-08-29
US20120227985A1 (en) 2012-09-13
FI20090415A0 (en) 2009-11-09
KR101749914B1 (en) 2017-07-03
FI122434B (en) 2012-01-31
EP2499325A4 (en) 2017-03-29
EP2499325A1 (en) 2012-09-19
EP2499325B1 (en) 2018-03-28

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