US20130000888A1 - Jetting tool for well cleaning - Google Patents
Jetting tool for well cleaning Download PDFInfo
- Publication number
- US20130000888A1 US20130000888A1 US13/634,808 US201113634808A US2013000888A1 US 20130000888 A1 US20130000888 A1 US 20130000888A1 US 201113634808 A US201113634808 A US 201113634808A US 2013000888 A1 US2013000888 A1 US 2013000888A1
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- US
- United States
- Prior art keywords
- fluid
- jetting tool
- jetting
- main body
- assembly
- 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
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- 238000004140 cleaning Methods 0.000 title description 11
- 239000012530 fluid Substances 0.000 claims abstract description 193
- 238000005553 drilling Methods 0.000 claims abstract description 35
- 239000012190 activator Substances 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims abstract description 10
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 description 21
- 230000000694 effects Effects 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 239000011800 void material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
- E21B34/142—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools unsupported or free-falling elements, e.g. balls, plugs, darts or pistons
Abstract
The invention provides for a jetting tool for use with a drillstring. The tool generally includes a tubular main body having an inlet and an outlet arranged in fluid communication via a fluid conduit, the main body defining at least one aperture along its length. The tool also includes an elongate outer ring assembly configured for fitment about the main body to enclose the at least one aperture. This ring assembly defines an upper circumferential fluid port and a lower circumferential fluid port, each port configured to operatively direct fluid towards the other. The tool also typically includes a valve assembly receivable inside the fluid conduit, the valve assembly displaceable between a drilling position, wherein fluid is able to pass from the inlet to the outlet via the fluid conduit, and a jetting position, in which fluid is diverted from the inlet to the upper and lower fluid ports via the aperture. The valve assembly is configured to displace to the drilling position upon receiving an activator body via pressurised fluid through the drillstring.
Description
- This invention relates to a jetting tool for well cleaning.
- Reference in this specification to any prior publication (or information derived from it), or to any matter which is known, is not, and should not be taken as an acknowledgment or admission or any form of suggestion that the prior publication (or information derived from it) or known matter forms part of the common general knowledge in the field of endeavour to which this specification relates.
- Jetting tools are known in the art and are generally down-hole devices that jet a high-pressure, typically sand-laden, fluid stream to clean out wellbore holes. For example, U.S. Pat. No. 6,732,793 describes a jetting tool assembly for use in cleaning tubular components used in drilling for gaseous or liquid hydrocarbons in producing formations, said assembly being connectable to a hollow drillstring and having a first mode of operation, which allows through-flow of fluid and lengthwise of the drillstring, and a second mode of operation, which routes the fluid transversely outwardly of the drillstring.
- There are a number of shortcomings with known jetting tools, especially their ability to effectively clean boreholes and/or assist in removing coal fines or silt from a void between a borehole and a perforated casing. Such perforated casings are known in the art and are typically used to line a well to allow gas to enter the casing from the producing formations and thereby exit the well.
- According to an aspect of the invention there is provided a jetting tool for use with a drillstring, the tool including:
-
- a body assembly having an inlet for coupling to the drillstring to allow fluid to be supplied therefrom, the body assembly defining first and second substantially circumferential fluid ports, the first and second fluid ports being spaced apart along the body assembly, and each port being configured to operatively direct the fluid outwardly from the body assembly and towards the other port.
- Typically the body assembly includes:
-
- a tubular body including:
- the inlet; and
- first and second sets of circumferentially spaced apertures; and,
- first and second ring bodies, each ring body being attached to the tubular body to thereby define the first and second substantially circumferential fluid ports.
- a tubular body including:
- Typically the first and second fluid ports are defined by a gap between shoulders of the tubular body and the first and second ring bodies.
- Typically the body assembly includes a third set of circumferentially spaced apertures arranged between the first and second sets of circumferentially spaced apertures.
- Typically the body assembly includes:
-
- a tubular main body having an inlet and an outlet arranged in fluid communication via a fluid conduit, the main body defining at least one aperture along its length; and,
- an elongate outer ring assembly configured for fitment about the main body to enclose the at least one aperture, the ring assembly defining an upper circumferential fluid port and a lower circumferential fluid port, each port configured to operatively direct fluid towards the other.
- Typically the tool includes:
-
- a valve assembly receivable inside the fluid conduit, the valve assembly displaceable between a drilling position, wherein fluid is able to pass from the inlet to the outlet via the fluid conduit, and a jetting position, in which fluid is diverted from the inlet to the upper and lower fluid ports via the aperture, the valve assembly configured to displace to the drilling position upon receiving an activator body via pressurised fluid through the drillstring.
- Typically, the at least one aperture includes a plurality of slots axially spaced about a portion of the main body.
- Typically, the main body includes a flange for positioning the outer ring assembly. Typically, the jetting tool includes a fluid tight seal to prevent fluid leakage between the main body and the outer ring assembly.
- Typically, the circumferential fluid ports include slots around a respective upper and lower circumference of the ring assembly, the slots separated a predetermined distance.
- Typically, the predetermined distance is in the range of 10 cm to 80 cm.
- Typically, the valve assembly includes a hollow elongate stem shaped and dimensioned for coaxial fitment into the fluid conduit, the stem having a receptacle for receiving the activator body.
- Typically, the receptacle is positioned towards a lower end of the stem to facilitate in uniform fluid dispersal between the fluid ports when the valve assembly is in the jetting position.
- Typically, the jetting tool includes biasing means configured to bias the valve assembly into the drilling position.
- Typically, the biasing means includes a spring.
- Typically, the jetting tool includes a valve seal to prevent leakage between the valve assembly and the main body.
- Typically the circumferential fluid ports are separated by a predetermined distance.
- Typically the predetermined distance is in the range of 10 cm to 80 cm.
- Typically the circumferential fluid ports are shaped and configured so that fluid is ejected therefrom at an angle relative to the main body.
- Typically the angle is in the range of 10° to 85°.
- Typically the circumferential fluid ports are arranged to define a jetting zone positioned between the circumferential fluid ports.
- According to another aspect of the invention there is provided a jetting tool for use with a drillstring, the tool including:
-
- a tubular main body having an inlet and an outlet arranged in fluid communication via a fluid conduit, the main body defining at least one aperture along its length;
- an elongate outer ring assembly configured for fitment about the main body to enclose the at least one aperture, the ring assembly defining an upper circumferential fluid port and a lower circumferential fluid port, each port configured to operatively direct fluid towards the other;
- a valve assembly receivable inside the fluid conduit, the valve assembly displaceable between a drilling position, wherein fluid is able to pass from the inlet to the outlet via the fluid conduit, and a jetting position, in which fluid is diverted from the inlet to the upper and lower fluid ports via the aperture, the valve assembly configured to displace to the drilling position upon receiving an activator body via pressurised fluid through the drillstring.
- An example of the present invention will now be described with reference to the accompanying drawings, in which:
-
FIG. 1 shows an exploded diagrammatic representation of a jetting tool for use with a drillstring; -
FIG. 2 shows a side schematic view of a main body of the jetting tool; -
FIG. 3 shows a side sectional view of the main body along the line A-A as indicated inFIG. 3A ; -
FIG. 4 shows a perspective representation of an outer ring assembly of the jetting tool; -
FIG. 5 shows a side schematic view of the outer ring assembly; -
FIG. 6 shows a side sectional view of the outer ring assembly along the line A-A as indicated inFIG. 6A ; -
FIG. 7 shows an exploded side representation of the outer ring assembly; -
FIG. 8 shows an exploded perspective schematic representation of the outer ring assembly; -
FIG. 9 shows a side schematic representation of a ring body of the outer ring assembly; -
FIG. 10 shows a perspective representation of the ring body; -
FIG. 11 shows a side sectional representation of the ring body along the line A-A as indicated inFIG. 11A ; -
FIG. 12 shows a perspective representation of a lower sealing ring of the outer ring assembly; -
FIG. 13 shows a side schematic representation of the lower sealing ring; -
FIG. 14 shows a side sectional representation of the lower sealing ring along the line A-A as indicated inFIG. 14A ; -
FIG. 15 shows a perspective representation of an upper sealing ring of the outer ring assembly; -
FIG. 16 shows a side schematic representation of the upper sealing ring; -
FIG. 17 shows a side sectional representation of the upper sealing ring along the line A-A as indicated inFIG. 17A ; -
FIG. 18 shows a side diagrammatic representation of a valve assembly of the jetting tool; -
FIG. 19 shows a side sectional representation of the valve assembly along the line B-B as indicated inFIG. 19A ; -
FIG. 20 shows an exploded diagrammatic representation of the valve assembly; -
FIG. 21 shows a side sectional representation of the jetting tool along the line A-A as indicated inFIG. 21 A with,the valve assembly in a drilling position; and -
FIG. 22 shows a side sectional representation of the jetting tool along the line A-A as indicated inFIG. 22A with the valve assembly in a jetting position; -
FIG. 23 shows an exploded side representation of a second example of a jetting tool for use with a drillstring; -
FIG. 24 shows a side representation of the jetting tool ofFIG. 23 ; -
FIG. 25 shows a cross sectional representation along the line A-A as indicated inFIG. 23 ; and, -
FIG. 26 shows a side representation of a jetting zone produced using s jetting tool. - With reference now to
FIG. 1 of the drawings, there is shown an example of ajetting tool 10 for use with a drillstring (not shown). As is known in the art, a drill string is, used together with some manner of drilling rig as a column, or string, of drill pipe or tube that transmits drilling fluid (typically via compressors and/or mud pumps) and rotational power (generally via a drive mechanism) to a drill bit. The term is loosely applied as an assembled collection of the drill pipe or tube, drill collars, tools and drill bit. The drill string is hollow so that drilling fluid can be pumped down through it and circulated back up a void between the drill string and a drilling formation. It is to be appreciated that the term “fluid” includes any substance, such as a liquid or gas, that is capable of flowing and that changes its shape when acted upon by a force. The ‘term drillstring will therefore be understood to include tubing, or other similar arrangements that can be in drilling or on a drilling rig. - The jetting
tool 10 generally forms part of the bottom hole assembly (BHA), where the BHA is made up of tools which may include a drill bit which is used to break-up the rock formations and/or packers or plugs of a well, drill collars which are heavy, thick-walled tubulars used to apply weight to the drill bit, and stabilizers which keep the drilling assembly centered in the hole. The BHA may also contain other components such as a downhole motor, rotary steerable system, measurement while drilling (MWD), and logging while drilling (LWD) tools. In this example, the function of the jettingtool 10 is twofold: firstly the jettingtool 10 allows fluid to pass to the drill bit, and secondly thejetting tool 10 can be used to direct fluid laterally towards the borehole, for example to remove coal fines or silt from the void behind a perforated casing and/or to allow similar cleaning of a hole or well drilled by the bit. - In the current example, the jetting
tool 10 includes a tubularmain body 12, anouter ring assembly 30, and avalve assembly 50. In use, thetool 10 is generally activated by means of anactivator body 70 which is passed down the drillstring via the fluid, as described in more detail below. Each of the above components will now be considered in closer detail. - Referring now to
FIGS. 2 and 3 of the drawings, the tubularmain body 12 is shown in more detail. Themain body 12 includes aninlet 14 and anoutlet 16 which are arranged in fluid communication via afluid conduit 24, as shown. During drilling operations, the drilling fluid enters the tubularmain body 12 via theinlet 14 to pass through theconduit 24 and exit themain body 12 at theoutlet 16. - The
main body 12 generally defines at least oneaperture 18 along its length. In the current example, themain body 12 defines a plurality ofslots 18 which are axially spaced about a portion of themain body 12, as shown. Theslots 18 are spaced about a central portion of the main body, with theconduit 24 arranged in fluid communication with theslots 18 by means ofpassages 28. As such, if fluid enters themain body 12 via theinlet 14, it can exit via thepassages 28 leading to theslots 18, as well as via theoutlet 16. However, as described in more detail below, thevalve assembly 50 only allows fluid to exit via theoutlet 16 or, alternatively, theslots 18, but generally not both at the same time. - The
main body 12 also includes avalve seat 26 for receiving and locating avalve head 52 of thevalve assembly 50, as described in more detail below. Themain body 12 is shaped and configured to receive theouter ring assembly 30. To this end, themain body 12 defines aflange 20 for positioning theouter ring assembly 30. When received, theouter ring assembly 30 generally abuts theflange 20, which keeps theouter ring assembly 30 in place about themain body 12. - An example of the
outer ring assembly 30 is shown in more detail inFIGS. 4 to 8 . Theouter ring assembly 30 generally includes an elongate ring body 31with anupper sealing ring 36 and alower sealing ring 38 fixed thereto at respective upper and lower ends of thering body 31. As mentioned above, theouter ring assembly 30 is configured for fitment about themain body 12 in order to enclose theslots 18 in the main body. - In addition, the
outer ring assembly 30 defines an upper circumferentialfluid port 32 and a lowercircumferential fluid port 34. In the current example, thesefluid ports ring body 31 and the respective sealing rings 36 and 38. Whilst thefluid ports -
FIGS. 9 to 11 show thering body 31 in more detail. Thering body 31 definesupper projections 42 andlower holes 44, as shown. Similarly, the lower sealing ring 38 (shown in more detail inFIGS. 12 to 14 ) is shaped, dimensioned and configured to complementarily engage the lower end of thering body 31 so that theholes 44 and thelower sealing ring 38 definespaces 46 via which fluid can pass from inside thering body 31 to thelower fluid port 34. - Similarly, upper sealing ring 36 (shown in more detail in
FIGS. 15 to 17 ) is shaped, dimensioned and configured to complementarily engage an upper end of thering body 31 so that theprojections 42 and theupper sealing ring 36 definespaces 46 via which fluid can pass from inside thering body 31 to theupper fluid port 34. - Both the upper and lower sealing rings 36 and 38 include fluid
tight seals 48 to prevent fluid leakage between themain body 12 and theouter ring assembly 30 when theouter ring assembly 30 is fitted about themain body 12. As explained above, theseseals 48 effectively prevent fluid from passing between the sealing rings 36 and 38 and themain body 12 such that the fluid can only exit via thefluid ports outer ring assembly 30. - In the current example, the
circumferential fluid ports ring body 31 as slots extending around the upper and lower circumferences of thering assembly 30, as shown. These slots ofports - The
fluid ports upper port 32 directs fluid towards thelower port 34 and vice versa. To accomplish this, theports main body 12. Typically, the angle at which fluid is ejected can be in the range of 10° to 85° (generally around 45°) relative to the length of themain body 12, according to requirements. - The arrangement of the
fluid ports tool 10 of the current arrangement features the twofluid ports tool 10. - In one example, these
ports fluid ports valve assembly 50 is in a jetting position. Trial results to date have shown that this arrangement significantly increases a volume of fluid passing through thefluid ports ports ring body 31 may also definesfluid apertures 40 in a side thereof to facilitate in the removal of silt and dirt loosened by the action of thefluid ports fluid apertures 40 can be spaced around thering body 31 at different positions and are typically configured to direct fluid sideways of themain body 12 to facilitate in removal of loosened silt and/or dirt. - It is to be appreciated that in another example, the
fluid ports outer ring assembly 30. For example, eachfluid port ring assembly 30, or the like. Alternatively, afluid port ring assembly 30. - Referring now to
FIGS. 18 to 20 of the drawings, an example of thevalve assembly 50 is shown in more detail. Thevalve assembly 50 is generally receivable inside thefluid conduit 24 of themain body 12, with thevalve assembly 50 arranged to be displaceable between a drilling position, wherein fluid is able to pass from theinlet 14 to theoutlet 16 via thefluid conduit 24, and a jetting position, in which fluid is diverted from theinlet 14 to the upper and lowerfluid ports slots 18 in themain body 12. - In the current example, the
valve assembly 50 includes a hollow elongate valve stem 56 with avalve head 52. The valve assembly also includes a float orflapper valve 72 inserted into theconduit 24 of themain body 12 above thevalve assembly 50, as shown. Thefloat 72 is required to prevent pressurized fluid from exiting the drillstring, as is know in the art. Thevalve head 52 rests inside thevalve seat 26 of themain body 12 and abuts in a sealing manner against thefloat 72, which typically includes a rubber seal at this abutting surface, to seal thevalve seat 26 from theconduit 24 when in the drilling position. The valve stem 52 is hollow and effectively forms asecond conduit 53 inside theconduit 24 of themain body 12 when in use, allowing fluid to pass through thevalve assembly 50. - The
valve assembly 50 further includesvalve spacers 54 and avalve shoulder 57 to position and space thevalve assembly 50 inside theconduit 24 of themain body 12. Thesespacers 54 andshoulder 57 ensure that there is space for fluid to pass to thepassages 28 of themain body 12 between thestem 56 of thevalve assembly 50 and theconduit 24 of themain body 12 when thevalve assembly 50 is in the jetting position. - The
valve assembly 50 is configured to displace into the jetting position upon receiving anactivator body 70 under pressure from the fluid passing through the drillstring. This activator body is typically a ball or the like. Thevalve assembly 50 also includes areceptacle 58 for receiving the activator body. Thereceptacle 58 is typically positioned towards a lower end of thevalve stem 56 to facilitate in uniform fluid dispersal between thefluid ports outer ring assembly 30 when thevalve assembly 50 is in the jetting position, as described in more detail below. Thereceptacle 58 is typically machined as a lower part of thevalve stem 56, or the like. However, in further examples, thereceptacle 58 may be positioned at any position along thevalve assembly 50, depending on requirements. - The
valve shoulder 57 also includes valve seals 60 to prevent leakage between thevalve assembly 50 and themain body 12. The valve seals 60 are typically kept in place on theshoulder 57 by means of seal retaining rings 62. In effect, the valve seals 60 prevents fluid passing from thesecond conduit 53 of thevalve stem 56 to theoutlet 16 of the main body when in the jetting position. However, it is to be appreciated that different examples may include different valve seal configurations. - The jetting
tool 10 also generally includes a biasing means 74, such as a spring, configured to bias thevalve assembly 50 into the drilling position, i.e. where thevalve head 52 engages thefloat 72 on top of thevalve seat 26. The current example also includes a stopper block, 76 to keep thespring 74 in position in theconduit 24 of themain body 12. In addition, thestopper block 76 generally also determines a lower position of thevalve assembly 50 which ensures that thevalve head 52 is correctly located inside thevalve seat 26 and theconduit 24. In another example, thestopper block 76 may be included as a machined part of themain body 12. - Referring now to
FIG. 21 of the drawings, an assembledjetting tool 10 is shown with thevalve assembly 50 in the drilling position, i.e. thevalve head 52 engages with thefloat 72 on top of thevalve seat 26 of themain body 12. In this position, any fluid entering themain body 12 via theinlet 14 is able to pass through thesecond conduit 53 of thevalve stem 56 and exit thetool 10 via theoutlet 16, allowing the fluid to be supplied to a drill head, or the like. -
FIG. 22 shows the jettingtool 10 with thevalve assembly 50 in the jetting position. In this position, theactivator body 70 is received in thereceptacle 58 of thevalve assembly 50, as shown. The activator body orball 70 blocks thesecond conduit 53 of thevalve assembly 50 and the pressure of the fluid overcomes the biasing means 74 so that theentire valve stem 56 is forced downwards into themain body 12.. This downwards movement of thevalve stem 56 causes thevalve head 52 to disengage from thefloat 72 and move down into thevalve seat 26 of themain body 12, arranging thefluid conduit 24 of themain body 12 in fluid communication with thefluid space 78 between thevalve stem 52 and theconduit 24, as shown. Fluid is now able to bypass thevalve head 52, enter thevalve seat 26 and flow into thefluid space 78. - Fluid is then able to pass from the
inlet 14 to thepassages 28 to reach theslots 18 defined by themain body 12. As mentioned above, theslots 18 are in fluid communication with theouter ring assembly 30 where the sealing rings 36 and 38 forces the fluid to escape via thefluid ports fluid flow arrows 80. In another example, different passages may direct fluid to different areas of theouter ring assembly 30. For example, some of thepassages 28 in themain body 12 may be configured to lead directly tospaces 46, or the like, depending on requirements. - It is regarded as advantageous that the jetting
tool 10 of the current arrangement provides for improved cleaning of perforated casings and/or wellbores without requiring removal of a bottom hole assembly (BHA) from the well. - In one example, the above described system can be used to clean the borehole once drilling of the borehole is complete. For example, once the drilling process is completed, the
activator body 70 can be inserted into the fluid provided to the BHA, thereby switching the jetting tool to jetting mode. As the drillstring and hence the BHA is removed from the borehole, this raises the jetting tool, allowing the borehole to be cleaned along the bore hole length. - In any alternative example however, the jetting tool can be designed to operate in a single jetting mode only. An example of a jetting tool for operating in this configuration is described in
FIGS. 23 to 26 . - In this example, the jetting tool includes 110 includes a
body 112 having aninlet 114 in fluid communication with afluid conduit 124. Anoutlet 116 may be provided an opposite end of thefluid conduit 124, and alternatively thefluid conduit 124 may be closed at the end opposite theinlet 114. The -fluid conduit 124 includes two sets of circumferentially spaced apertures 128.1, 128.2 spaced apart along the length of thebody 112. A third set ofapertures 140 may be provided between the first and second sets of apertures 128.1, 128.2. - First and second sealing rings 136.1, 136.2 are attached to the
body 112, so as to define circumferential fluid ports 132.1, 132.2. Each sealing ring 136.1, 136.2 includes a respective seal 148.1, 148.2 for sealingly engaging a corresponding seat 182.1, 182.2, provided on thebody 112. A gap 184.1, 184.2 provided between shoulders 180.1, 180.2, 182.1, 182.2, provided on thebody 112 and sealing rings 136.1, 136.2 defines the first and second fluid ports 132.1, 132.2. - In this example, the shoulders 180.1, 180.2, 182.1, 182.2 are arranged so that fluid is ejected from each fluid port 132.1, 132.2, towards the other fluid port 132.1, 132.2, at an angle relative to the
body 112, as shown for example by the arrows 190.1, 190.2, thereby defining ajetting zone 195 between the fluid ports 132.1, 132.2. The angle is typically in the range of 10° to 85° (generally around 45°), although any angle may be used to define an appropriate jetting zone. It will be appreciated that in general it is preferred that fluid from each of the fluid ports impacts on the borehole surface at substantially the same location, thereby maximizing the cleaning effect of the jetting tool. Accordingly, the angle selected will depend on factors such as the diameter of theborehole 200, the diameter of the jetting tool, and the separation between the fluid ports 132.1, 132.2. - In addition to the first and second fluid ports 132.1, 132.2, the body may include a third set of circumferentially spaced
apertures 140, which are positioned between the first and second set of apertures, to thereby define a third fluid port. The third fluid port directs additional fluid into the jetting zone, thereby further enhancing the cleaning effect provided by the jetting tool. - Accordingly, the above described apparatus describes a jetting tool including a body assembly having an inlet for coupling to the drillstring to allow fluid to be supplied therefrom. The body assembly defines first and second substantially circumferential fluid ports, the first and second fluid ports being spaced apart along the body assembly, and each port being configured to operatively direct the fluid outwardly from the body assembly and towards the other port. This allows the jetting tool to direct fluid supplied via the drillstring into a jetting zone, thereby efficiently cleaning both the surface of the borehole and the region between the borehole and the jetting tool.
- In one example, the jetting tool is attached to an end of the drillstring, so that the drillstring and jetting tool combination is used for cleaning only. In another example however, the jetting tool can be coupled to a BHA, such as a drill head, to thereby allow drilling to be performed. The jetting tool can include a valve assembly, which is initially configured to allow fluid to be transferred through the jetting tool to the drill head, during drilling. Once drilling is complete, an activator is inserted into the drillstring, with the activator cooperating with the valve assembly, allowing the jetting tool to be switched to a jetting mode, which in turn allows the borehole to be cleaned, particularly as the drillstring is removed from the borehole.
- Many modifications or variations will be apparent to those skilled in the art without departing from the scope of the present invention. All such variations and modifications should be considered to fall within the spirit and scope of the invention broadly appearing and described in more detail herein.
- It is to be appreciated that reference to “one example” or “an example” of the invention is not made in an exclusive sense. Accordingly, one example may exemplify certain aspects of the invention, whilst other aspects are exemplified in a different example. These examples are intended to assist the skilled person in performing the invention and are not intended to limit the overall scope of the invention in any way unless the context clearly indicates otherwise.
- Features that are common to the art are not explained in any detail as they are deemed to be easily understood by the skilled person. Similarly, throughout this specification, the term “comprising” and its grammatical equivalents shall be taken to have an inclusive meaning, unless the context of use clearly indicates otherwise.
Claims (23)
1. A jetting tool for use with a drillstring, the tool including:
a body assembly having an inlet for coupling to the drillstring to allow fluid to be supplied therefrom, the body assembly defining first and second substantially circumferential fluid ports, the first and second fluid ports being spaced apart along the body assembly, and each port being configured to operatively direct the fluid outwardly from the body assembly and towards the other port.
2. A jetting tool according to claim 1 , wherein the body assembly includes:
a tubular body including:
the inlet; and
first and second sets of circumferentially spaced apertures; and, first and second ring bodies, each ring body being attached to the tubular body to thereby define the first and second substantially circumferential fluid ports.
3. A jetting tool according to claim 2 , wherein the first and second fluid ports are defined by a gap between shoulders of the tubular body and the first and second ring bodies.
4. A jetting tool according to claim 1 , wherein the body assembly includes a third set of circumferentially spaced apertures arranged between the first and second sets of circumferentially spaced apertures.
5. A jetting tool according to claim 1 , wherein the body assembly includes:
a tubular main body having an inlet and an outlet arranged in fluid communication via a fluid conduit, the main body defining at least one aperture along its length; and,
an elongate outer ring assembly configured for fitment about the main body to enclose the at least one aperture, the ring assembly defining an upper circumferential fluid port and a lower circumferential fluid port, each port configured to operatively direct fluid towards the other.
6. A jetting tool according to claim 5 , wherein the tool includes:
a valve assembly receivable inside the fluid conduit, the valve assembly being displaceable between a drilling position, wherein fluid is able to pass from the inlet to the outlet via the fluid conduit, and a jetting position, in which fluid is diverted from the inlet to the upper and lower fluid ports via the aperture, the valve assembly configured to displace to the drilling position upon receiving an activator body via pressurised fluid through the drillstring.
7. The jetting tool of claim 5 6 or claim 7 , wherein the at least one aperture includes a plurality of slots circumferentially spaced about a portion of the main body.
8. The jetting tool of claim 5 , wherein the main body includes a flange for positioning the outer ring assembly.
9. The jetting tool of claim 5 , which includes a fluid tight seal to prevent fluid leakage between the main body and the outer ring assembly.
10. The jetting tool of claim 5 , wherein the circumferential fluid ports include slots around a respective upper and lower circumference of the ring assembly, the slots being separated by a predetermined distance.
11. The jetting tool of claim 10 , wherein the predetermined distance is in the range of 10cm to 80cm.
12. The jetting tool of claim 6 , wherein the valve assembly includes a hollow elongate stem shaped and dimensioned for coaxial fitment into the fluid conduit, the stem having a receptacle for receiving the activator body.
13. The jetting tool of claim 12 , wherein the receptacle is positioned towards a lower end of the stem to facilitate in uniform fluid dispersal between the fluid ports when the valve assembly is in the jetting position.
14. The jetting tool of claim 6 , which includes biasing means configured to bias the valve assembly into the drilling position.
15. The jetting tool of claim 14 , wherein the biasing means includes a spring.
16. The jetting tool of claim 6 , which includes a valve seal to prevent leakage between the valve assembly and the main body.
17-25. (canceled)
26. The jetting tool of claim 1 , wherein the circumferential fluid ports are separated by a predetermined distance.
27. The jetting tool of claim 26 , wherein the predetermined distance is in the range of 10 cm to 80 cm.
28. The jetting tool of claim 1 , wherein the circumferential fluid ports are shaped and configured so that fluid is ejected therefrom at an angle relative to the main body.
29. The jetting tool of claim 28 , wherein the angle is in the range of 10° to 85°.
30. A jetting tool according to claim 1 , wherein the circumferential fluid ports are arranged to define a jetting zone positioned between the circumferential fluid ports.
31. A jetting tool for use with a drillstring, the tool including:
a tubular main body having an inlet and an outlet arranged in fluid communication via a fluid conduit, the main body defining at least one aperture along its length;
an elongate outer ring assembly configured for fitment about the main body to enclose the at least one aperture, the ring assembly defining an upper circumferential fluid port and a lower circumferential fluid port, each port configured to operatively direct fluid towards the other;
a valve assembly receivable inside the fluid conduit, the valve assembly displaceable between a drilling position, wherein fluid is able to pass from the inlet to the outlet via the fluid conduit, and a jetting position, in which fluid is diverted from the inlet to the upper and lower fluid ports via the aperture, the valve assembly configured to displace to the drilling position upon receiving an activator body via pressurised fluid through the drillstring.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2010901123A AU2010901123A0 (en) | 2010-03-17 | A jetting tool for well cleaning | |
AU2010901123 | 2010-03-17 | ||
PCT/AU2011/000279 WO2011113086A1 (en) | 2010-03-17 | 2011-03-14 | A jetting tool for well cleaning |
Publications (1)
Publication Number | Publication Date |
---|---|
US20130000888A1 true US20130000888A1 (en) | 2013-01-03 |
Family
ID=44648340
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/634,808 Abandoned US20130000888A1 (en) | 2010-03-17 | 2011-03-14 | Jetting tool for well cleaning |
Country Status (6)
Country | Link |
---|---|
US (1) | US20130000888A1 (en) |
EP (1) | EP2547861A1 (en) |
AU (1) | AU2011229131A1 (en) |
CA (1) | CA2792286A1 (en) |
EA (1) | EA201290803A1 (en) |
WO (1) | WO2011113086A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140196954A1 (en) * | 2013-01-11 | 2014-07-17 | Weatherford/Lamb, Inc. | Jetting tool |
US20150167697A1 (en) * | 2013-12-18 | 2015-06-18 | General Electric Company | Annular flow jet pump for solid liquid gas media |
US10352132B2 (en) * | 2016-10-18 | 2019-07-16 | David Griffith | Automatic downhole jetting system |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4169483A (en) * | 1978-05-26 | 1979-10-02 | Bonn Thomas S | Hydraulic jet drill stem and bit unplugging device |
US6062311A (en) * | 1997-05-02 | 2000-05-16 | Schlumberger Technology Corporation | Jetting tool for well cleaning |
US6253861B1 (en) * | 1998-02-25 | 2001-07-03 | Specialised Petroleum Services Limited | Circulation tool |
US6722438B2 (en) * | 2000-07-31 | 2004-04-20 | David Sask | Method and apparatus for formation damage removal |
US20060157249A1 (en) * | 2005-01-14 | 2006-07-20 | Reynolds James S | Finger boot basket |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2064386B (en) * | 1979-11-09 | 1983-01-19 | Nat Res Dev | Cleaning using mixtures of liquid and abrasive particles |
GB9001249D0 (en) * | 1990-01-19 | 1990-03-21 | British Hydromechanics | Descaling device |
US5195585A (en) * | 1991-07-18 | 1993-03-23 | Otis Engineering Corporation | Wireline retrievable jet cleaning tool |
GB9915885D0 (en) * | 1999-07-08 | 1999-09-08 | Lee Paul B | Downhole valve for use with a drillstring |
-
2011
- 2011-03-14 US US13/634,808 patent/US20130000888A1/en not_active Abandoned
- 2011-03-14 CA CA2792286A patent/CA2792286A1/en not_active Abandoned
- 2011-03-14 WO PCT/AU2011/000279 patent/WO2011113086A1/en active Application Filing
- 2011-03-14 EA EA201290803A patent/EA201290803A1/en unknown
- 2011-03-14 EP EP11755546A patent/EP2547861A1/en not_active Withdrawn
- 2011-03-14 AU AU2011229131A patent/AU2011229131A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4169483A (en) * | 1978-05-26 | 1979-10-02 | Bonn Thomas S | Hydraulic jet drill stem and bit unplugging device |
US6062311A (en) * | 1997-05-02 | 2000-05-16 | Schlumberger Technology Corporation | Jetting tool for well cleaning |
US6253861B1 (en) * | 1998-02-25 | 2001-07-03 | Specialised Petroleum Services Limited | Circulation tool |
US6722438B2 (en) * | 2000-07-31 | 2004-04-20 | David Sask | Method and apparatus for formation damage removal |
US20060157249A1 (en) * | 2005-01-14 | 2006-07-20 | Reynolds James S | Finger boot basket |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140196954A1 (en) * | 2013-01-11 | 2014-07-17 | Weatherford/Lamb, Inc. | Jetting tool |
WO2014110444A3 (en) * | 2013-01-11 | 2014-12-31 | Weatherford/Lamb, Inc. | Jetting tool |
US20150167697A1 (en) * | 2013-12-18 | 2015-06-18 | General Electric Company | Annular flow jet pump for solid liquid gas media |
US10352132B2 (en) * | 2016-10-18 | 2019-07-16 | David Griffith | Automatic downhole jetting system |
Also Published As
Publication number | Publication date |
---|---|
CA2792286A1 (en) | 2011-09-22 |
EA201290803A1 (en) | 2013-04-30 |
AU2011229131A1 (en) | 2012-09-13 |
EP2547861A1 (en) | 2013-01-23 |
WO2011113086A1 (en) | 2011-09-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |