EP3135854B1 - Wellbore reaming tool - Google Patents

Wellbore reaming tool Download PDF

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Publication number
EP3135854B1
EP3135854B1 EP15460053.0A EP15460053A EP3135854B1 EP 3135854 B1 EP3135854 B1 EP 3135854B1 EP 15460053 A EP15460053 A EP 15460053A EP 3135854 B1 EP3135854 B1 EP 3135854B1
Authority
EP
European Patent Office
Prior art keywords
cutting blades
drilling tool
cutting
drilling
tool
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
EP15460053.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3135854A1 (en
Inventor
Pawel Szewczuk
Lukasz Bolewski
Jacek Lubinski
Marek Szkodo
Bartlomiej Karpinski
Mateusz Kmiec
Michal Antoszkiewicz
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.)
Przedsiebiorstwo Cemet Ltd Sp Z OO
Gdansk University of Technology
Original Assignee
Przedsiebiorstwo Cemet Ltd Sp Z OO
Gdansk University of Technology
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 Przedsiebiorstwo Cemet Ltd Sp Z OO, Gdansk University of Technology filed Critical Przedsiebiorstwo Cemet Ltd Sp Z OO
Priority to PL15460053T priority Critical patent/PL3135854T3/pl
Priority to EP15460053.0A priority patent/EP3135854B1/en
Publication of EP3135854A1 publication Critical patent/EP3135854A1/en
Application granted granted Critical
Publication of EP3135854B1 publication Critical patent/EP3135854B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • 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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type 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
    • E21B10/00—Drill bits
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • E21B10/602—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a rotary drag type bit with blades
    • 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

Definitions

  • the object of the invention is a drilling tool for maintaining a borehole and for cutting rock material.
  • Obtaining hydrocarbons by means of directional holes consists of a series of complex operations. The first of them is to drill a hole. This phase is followed by geophysical research on geometry condition of the raw borehole. Then, casing pipes are introduced into the borehole, which ensure stability and sealing of the borehole. Because of the forces inside the hole, present under the ground, and diversity of drilled rocks, the borehole begins to change its geometry immediately after the withdrawal of the drill. Therefore, there is a risk of capturing the casing pipes by rock layers tightening around and reducing the diameter of the hole. In addition, a swelling packet clay material is deposited on the surface of the casing pipes and prevents conducting a proper cementing operation. To prevent such a scenario, a number of methods are used:
  • a tool in a form of a bit for maintaining or expanding a borehole has a form of a hollow pipe which is placed in the borehole in which this tool is moved along this hole.
  • the tool further comprises means constituting blades and openings which are connected to the interior of the tool in the form of a pipe and are located axially in the front of the blade.
  • the removed material can be directed to the interior of the pipe, and the openings can have a form of slots and have an edge which constitutes a blade.
  • US 5 199 511 A discloses a drill bit and method in which polycrystalline diamond cutters mounted on a bit crown cut formation chips akin to the manner in which a grater cuts cheese. Chips in impermeable or plastic formations are extruded by the cutters into cavities internal to the bit via slots adjacent each cutter. Drilling fluid circulates internally of the bit from the drill string and into the annulus above that portion of the bit bearing cutters.
  • the portion of the bit body upon which the crown is formed is made of an elastomer which is pressurized into sealing engagement with the bottom of the borehole thereby further sealing freshly cut formation from drilling fluid.
  • US 6 527 065 B1 discloses cutting elements for use in a rotary drill bit, that are configured to facilitate positioning of the cutting elements at a positive rake angle with respect to the formation to enhance compressive stresses in the cutting element and to reduce cutting loads on the cutting elements.
  • the cutting element generally comprises a three-dimensional superabrasive cutting member having a leading edge and a three-dimensional arcuate scoop-like surface which conveys formation cuttings away from the cutting element.
  • the cutting element may also be formed to a substrate or backing.
  • a drill bit suitable for use of the cutting elements is also disclosed which includes passageways and internal fluid passages for enhancing the conveyance of formation cuttings away from the leading edge of the cutting element.
  • US 2002189863 A1 discloses a drill bit for drilling casing in a well bore.
  • the drill bit is constructed from a combination of relatively soft and relatively hard materials. The proportions of the materials are selected such that the drill bit provides suitable cutting and boring of the well bore while being able to be drilled through by a subsequent drill bit. Methods of applying hard materials to a soft material body are provided.
  • the stability of the borehole is affected by parameters such as:
  • the layers may extend in two directions but bonds between the films are weak and have a perfect cleavage allowing water and other molecules to be absorbed between the films, resulting in directional expansion.
  • the occurrence of swelling clays in the Ordovician, Silurian, Devonian, Carboniferous and Jurassic profiles was found.
  • the borehole is relatively stable, i.e. its dimensions remain substantially unchanged for several hours.
  • geological conditions The main obstacle during drilling and cementing processes are geological conditions prevailing in the holes.
  • One of the main problems is related to the swelling of clay formations, as indicated above. This leads to narrowing of the hole clearance, and consequently to its occlusion.
  • the rock material exhibiting a high viscosity, is deposited on the surface of the pipes, thereby preventing correct bonding of cement. Accumulation thereof leads to formation of local blockages, which causes formation of channels in the introduced cement paste.
  • the aim of the invention is to develop a drilling tool without the disadvantages of known tools.
  • a drilling tool for maintaining a borehole and for cutting rock material comprises a hollow elongated body in the form of a pipe, the body having a longitudinal axis and being provided with a plurality of cutting blades arranged around the body in such a way that they protrude from the external surface of the body, the drilling tool having an upper end, wherein the cutting blades are grouped into sets arranged on the periphery of the body,
  • the cutting blades are grouped into two levels of arranged on the periphery of the body, and arranged one upward of the other and offset from each other by an angle of 0 0 to 45 0 .
  • each set on one level comprises four cutting blades, wherein the sets of cutting blades are arranged on the periphery of the drilling tool every 90 0 .
  • each set on one level comprises six cutting blades, wherein six sets of cutting blades on one level are arranged symmetrically on the periphery of the drilling tool.
  • the cutting blades in each set are offset from the cutting blades located directly under it by an angle of 5 0 to 25 0 .
  • the upper end of the drilling tool is provided with a thread for connecting the drilling tool to casing pipes.
  • the drilling tool ends in a base made of a cuttable material.
  • directional channels are made in the base for optimal flow of the drilling mud.
  • inlet openings are made in the base for the flow of the drilling mud.
  • a drilling tool 1 for maintaining a borehole and for cutting rock material comprises an elongated body 2 in a form of a pipe.
  • the external surface of the body 2 of the drilling tool 1 is provided with a series of cutting blades 3 arranged around the body 2 in such a way that the cutting blades 3 protrude from the external surface of the body 2.
  • the cutting blades 3 are shaped as bands 4 connected to the body 2 of the drilling tool 1 in such a way that the ends of the bands 4 are connected to the body 2, and in the central part between the ends of the bands 4 they protrude from the body 2 so that they are at a larger distance from the axis of the drilling tool 1 than the external surface of the drilling tool 1.
  • the cutting blades 3 are grouped into sets 5 of cutting blades 3 so that in each set 5, the cutting blades 3 are placed one upward of the other, and the sets 5 can be angularly offset relative to each other.
  • This angular offset of the cutting blades 3 can vary within a range of 0 0 to 45 0 , wherein the offset value depends on many factors, such as, for example, size of the drilling tool 1 generally meant as its diameter, type of rock material in which the borehole is drilled, depth of the borehole, and many others. In an embodiment of the invention shown in Fig. 1 , this offset does not occur, i.e. it equals zero.
  • Each cutting blade 3 in the set 5 is spaced from the axis of the body 2 of the drilling tool 1 by a dimension larger than the dimension of the distance from the axis of the body 2 of the cutting blade 3 located directly downward of it. Such a solution causes that the cutting blade 3 located upward, collects a further layer of rock material the cutting blade 3 located downward was unable to collect.
  • elongated slots 6 are made, extending radially relative to the body 2, connecting the interior of the body 2 of the drilling tool 1 to its external surface.
  • the slots are not connected to the cutting blades 3 but, as shown in Fig. 5 , they are located under the bands 4 of the cutting blades 3.
  • the cutting blades 3 on the body 2 of the drilling tool 1 are configured so that their operation causes fragmentation and discharging the cut rock material towards the heel of the borehole.
  • the cutting blades 3 are grouped into sets 5 arranged on the periphery of the body 2 of the drilling tool 1 and placed one upward of the other, wherein in each set, there are six cutting blades 3, and and on one level around the body 2 of the drilling tool 1, six sets 5 of the cutting blades 3 are arranged.
  • the sets 5 of the cutting blades 3 are therefore arranged every 60 0 .
  • the number of sets 5 of the cutting blades 3 both horizontally and on the periphery of the body 2 of the drilling tool 1, depending on the destination, can vary.
  • the angular offset of the cutting blades 3 in the set 5 in relation to the cutting blades 3 located directly downward of them can vary and amount 5 0 to 25 0 , wherein in the embodiment shown in Fig. 1 , it amounts to 6 0 .
  • the drilling tool 1 In order to connect to a set of pipes used to maintain the borehole, the drilling tool 1 is provided with a thread 7 at its upper end.
  • the thread 7 is an internal thread but it is obvious that in other embodiments the thread may be formed outside the drilling tool 1.
  • the drilling tool 1 ends in a base 8 made of a cuttable material.
  • directional channels 9 are made for optimal flow of the drilling fluid.
  • the base 8 also has inlet openings 10 for the drilling fluid. After completion of its task, the base 8 of the drilling tool 1 may be drilled.
  • the principle of operation of the drilling tool 1, according to the invention is based on a solution innovative on a global scale, which allows cutting the rock material, and then fragmentising it and discharging it onto the surface out of the borehole.
  • the very idea of operation can be compared to the calibrator known from the engineering industry, which, however, uses the principle of operation of the ejector for removing the cut material from the cutting zone. It is this innovation that provides the developed tool with significant advantages over analogous structures.
  • Fig. 6 schematically shows the principle of operation of the ejector, relating to the drilling tool, according to the invention.
  • a fluid in this case a drilling fluid
  • the sucked rock material cut by the cutting blades 3 of the drilling tool 1
  • Fig. 5 This phenomenon is shown in more detail in Fig. 5 in relation to the drilling tool 1 according to this embodiment.
  • the slots 6 connecting the interior of the body 2 of the drilling tool 1 to its external surface correspond to the negative pressure zone of Fig. 6 .
  • the bands 4 of the cutting blades 3 are arranged, thereby forming, in each set 5 of the cutting blades 3, lateral channels 11 in which the rock material cut by the cutting blades 3 in the resulting borehole is accelerated.
  • This capturing and accelerating of the rock material leads to its further fragmentising at the edges of the cutting blades 3 and preventing formation of deposits on the casing pipes which could disturb the process of their cementing.
  • the proposed solution allows the use of high velocity gradients in the vicinity of the cutting blade 3 for precise fragmentation of the cut material and discharging it up the hole along with the drilling fluid.
  • Appropriate fragmentation of the cut material is essential as it prevents formation of so-called mud cakes. This translates into proper cementing of the hole and into environmental safety and return on investment.
  • the drilling tool 1, according to the invention does not have any moving parts, which contributes to its reliability.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
EP15460053.0A 2015-08-24 2015-08-24 Wellbore reaming tool Not-in-force EP3135854B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL15460053T PL3135854T3 (pl) 2015-08-24 2015-08-24 Narzędzie do wiercenia
EP15460053.0A EP3135854B1 (en) 2015-08-24 2015-08-24 Wellbore reaming tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15460053.0A EP3135854B1 (en) 2015-08-24 2015-08-24 Wellbore reaming tool

Publications (2)

Publication Number Publication Date
EP3135854A1 EP3135854A1 (en) 2017-03-01
EP3135854B1 true EP3135854B1 (en) 2021-12-29

Family

ID=54325503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15460053.0A Not-in-force EP3135854B1 (en) 2015-08-24 2015-08-24 Wellbore reaming tool

Country Status (2)

Country Link
EP (1) EP3135854B1 (pl)
PL (1) PL3135854T3 (pl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111101855B (zh) * 2020-03-05 2020-08-25 浙江大学城市学院 一种桩基工程低噪音打孔扩孔装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5199511A (en) * 1991-09-16 1993-04-06 Baker-Hughes, Incorporated Drill bit and method for reducing formation fluid invasion and for improved drilling in plastic formations
EP1242711B1 (en) * 1999-12-22 2006-08-16 Weatherford/Lamb, Inc. Drilling bit for drilling while running casing
EP1182323B1 (en) * 2000-08-21 2003-09-10 Camco International (UK) Limited Multi-directional cutters for bi-center drillout bits
US6527065B1 (en) * 2000-08-30 2003-03-04 Baker Hughes Incorporated Superabrasive cutting elements for rotary drag bits configured for scooping a formation
GB2482703B (en) 2010-08-11 2012-08-01 Jan Krzysiek Enlarging boreholes
CN104373059B (zh) * 2014-11-10 2017-02-08 中国石油天然气集团公司 漂浮引鞋

Also Published As

Publication number Publication date
PL3135854T3 (pl) 2022-06-20
EP3135854A1 (en) 2017-03-01

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