FI127692B - Poralaitekokoonpano, porajonokokoonpano varustettuna poralaitekokoonpanolla, sekä päätykappale ja takaiskuventtiilin kytkeytyvä elin käytettäväksi poralaitekokoonpanossa - Google Patents
Poralaitekokoonpano, porajonokokoonpano varustettuna poralaitekokoonpanolla, sekä päätykappale ja takaiskuventtiilin kytkeytyvä elin käytettäväksi poralaitekokoonpanossa Download PDFInfo
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- FI127692B FI127692B FI20175512A FI20175512A FI127692B FI 127692 B FI127692 B FI 127692B FI 20175512 A FI20175512 A FI 20175512A FI 20175512 A FI20175512 A FI 20175512A FI 127692 B FI127692 B FI 127692B
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- Prior art keywords
- drilling rig
- drill
- rig assembly
- fluid flow
- assembly
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- 239000012530 fluid Substances 0.000 claims abstract description 68
- 238000009527 percussion Methods 0.000 claims abstract description 49
- 239000002245 particle Substances 0.000 claims abstract description 44
- 230000005291 magnetic effect Effects 0.000 claims description 49
- 238000005553 drilling Methods 0.000 claims description 40
- 239000003566 sealing material Substances 0.000 claims description 9
- 230000005294 ferromagnetic effect Effects 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 210000004392 genitalia Anatomy 0.000 claims 1
- 238000007599 discharging Methods 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000011109 contamination Methods 0.000 description 4
- 230000007257 malfunction Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000013528 metallic particle Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- -1 i.e. Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
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- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/002—Down-hole drilling fluid separation systems
-
- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
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- 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)
Abstract
Poralaitekokoonpano (1), käsittäen poralaitteen (2), jolla on ainakin yksi liikutettava komponentti (2a), jolloin käytettäessä fluidivirtaus ohjataan liikutettavan komponentin (2a) ohi ja mainittu liikuteltava komponentti liikkuu muuhun poralaitekokoonpanoon nähden. Järjestettynä on tulovirtausreitti (3) fluidivirtauksen vastaanottamiseksi porajonon poralaitekokoonpanoa (1) edeltävältä osuudesta ja mainitun fluidivirtauksen ohjaamiseksi mainitun ainakin yhden liikutettavan komponentin (2a) ohitse, sekä poistovirtausreitti (4) fluidivirtauksen poistamiseksi mainitulta ainakin yhdeltä liikuteltavalta komponentilta (2a). Ainakin yksi sieppauselementin (5a, 5b, 5c) partikkeleiden talteen ottamiseksi fluidivirtauksesta on järjestettynä tulovirtausreittiin (3). Kohteena on myös porajonokokoonpano, perkussiolaitteen takapääty sekä vastaventtiilin sulkuelin käytettäväksi poralaitekokoonpanossa.
Description
A DRILL DEVICE ASSEMBLY, A DRILL STRING ASSEMBLY HAVING SUCH A DRILL DEVICE ASSEMBLY, AND A BACKHEAD AND A CHECK VALVE ENGAGING MEMBER FOR USE IN A DRILL DEVICE ASSEMBLY.
FIELD OF THE DISCLOSURE
The present disclosure relates to percussion devices, and more particularly to a drill device assembly used, for example in rotary drilling or down-the-hole (DTH) drilling. The present disclosure further concerns a drill string assembly having such a drill device assembly, and a backhead of percussion device and an engaging member of a check valve for use in such a drill device assembly.
BACKGROUND OF THE DISCLOSURE
In rotary drilling a drill bit is rotated while being pressed against the bottom of the drill hole. Typically, such a rotary drill bit comprises one or more conical rollers, which rotate when the drill bit is pressed against the bottom of the drill hole, thereby facilitating crushing the ground being drilled. A fluid flow is conducted through the drill bit for flushing crushed ground material and conveying it to the surface. As the fluid flow is conducted past the conical rollers, any impurities conveyed along with the fluid flow may drift to the bearing or bearing arrangements of the conical rollers. Particle contamination may cause excessive wear or even malfunction of the conical rollers and their bearings.
In DTH drilling, a percussion device providing percussion impacts to the drill tool is position near the bottom of the drill hole. A fluid flow is provided along the drill string, i.e. drill rods coupled one after another, to the percussion device so as to actuate it. During drilling, further drill rods are coupled to the drill string as the drill hole advances.
In the percussion device, reciprocating piston is used for generating percussive impacts. Any impurities conveyed to the reciprocating piston along with the fluid flow may lead to excessive wear, or even malfunction of the percussion device.
It has been noticed, that metallic particles come loose of the threaded connection of the drill rods when subsequent drill rods are coupled together. Due to their hardness, such metallic particles contribute greatly to the wear of the percussion device. In addition, other impurities from the drill site, such as ground particles and drill cuttings may contaminate the fluid flow during coupling of subsequent drill rods.
In the past, little consideration has been given to contamination of particles conveyed by the fluid flow to the moving parts of drill devices, such as rotary drill bits having conical rollers or a reciprocating piston of a percussion device.
Publication AU 2012100130 A4 discloses a drilling apparatus having a drill string comprising a plurality of interconnected subs, on of which is a filter sub for filtering drilling fluid flowing through the drill string.
Publication US 3971450 A discloses a drilling arrangement, in which a screen has been arrange upstream of a fluid motor for capturing cuttings or other debris which may otherwise clog the fluid motor.
Publication US 2017023068 A1 discloses that a drill string may include a magnet or a filter to separate and collect metal debris in drilling mud, so that such debris would not accumulate in magnetic gears.
BRIEF DESCRIPTION OF THE DISCLOSURE
An object of the present disclosure is to provide a drill device assembly, a drill string assembly, an engaging member of check valve, and a backhead of a percussion device, so as to solve the problems discussed above.
The objects of the disclosure are achieved by a drill device assembly, a drill string assembly, an engaging member of check valve, and a backhead of percussion device which are characterized by what is stated in the independent claims. The preferred embodiments of the disclosure are disclosed in the dependent claims.
The disclosure is based on the idea of providing a capturing element for recovering particles from a fluid flow, arranged in the inlet flow route 3 of the drill device assembly, thus preventing particles from being carried to at least one movable component of the by the fluid flow. In this way, excessive wear of the movable component caused by the abrasion of undesired particles, i.e, impurities, is avoided.
BRIEF DESCRIPTION OF THE DRAWINGS
In the following the disclosure will be described in greater detail by means of preferred embodiments with reference to the accompanying drawings, in which
Fig. 1 schematically illustrates a cross-sectional view of a drill string assembly according to an embodiment of the disclosure
Fig. 2 schematically illustrates a cross-sectional view of a drill device assembly in which a magnetic element is provided in connection with an engaging member of a check valve;
Fig. 3 schematically illustrates a cross-sectional view of drill device assembly in which a magnetic element is provided in connection with a backhead of a percussion device;
Fig. 4 schematically illustrates a cross-sectional view of a drill device assembly in which a magnetic element is provided in connection with both an engaging member of a check valve and with a backhead of a percussion device;
Fig. 5 schematically illustrates a cross-sectional view of a drill device assembly in which a magnetic element is provided in connection with an engaging member of a check valve, and screen element is provided in connection with a backhead of a percussion device;
Fig. 6 schematically illustrates a cross-sectional view of a drill device assembly in which both a magnetic element and a screen element is provided in connection with a backhead of a check valve, and
Fig. 7 schematically illustrates a cross-sectional view of a drill device assembly in which a magnetic element is provided in connection with both an engaging member of a check valve and with a backhead of a percussion device, while additionally a screen element is provided in connection with the backhead.
DETAILED DESCRIPTION OF THE DISCLOSURE
In the context of the present disclosure the term preceding is used to describe a situation in which an object is, when in use, above another object, i.e. resides in the direction of the surface or the drill rig, with respect to another object. Consequently, the term subsequent is used to describe a situation in which an object is, when in use, below another object, i.e. resides in the direction of the bottom of the drill hole, with respect to another object.
According to a first aspect of the disclosure, a drill device assembly (1) is provided. The drill device assembly comprises a drill device (2) having at least one movable component (2a). When in use, a fluid flow is directed past the movable component (2a) and said movable component (2a) has a movement with respect to the rest of the drill device assembly, namely the drill device. In other words, the movable component (2a) and the drill device (2) is prone to excessive wear due to the abrasion of undesired particles carried by the fluid flow. Examples of such movable components include a reciprocating piston (2a) of percussion device, and roller cones, particularly bearings thereof of in drill bits for rotary drilling. Such undesired particles, in turn, include metal cuttings removed from the drill rods or casing pipes when adjoining, or simply dirt and other impurities, for example. Conventionally, the fluid flow is of compressed air, however other gasses or liquids, such as water, may naturally be used.
The drill device assembly (1) further comprises an inlet flow route (3) for receiving a fluid flow from a portion of a drill string preceding the drill device assembly and conducting said fluid flow past the at least one movable component (2a), and a discharge flow route (4) for discharging fluid flow from the at least one movable component.
Moreover, the drill device assembly further comprises at least one capturing element (5a, 5b, 5c) for recovering particles from a fluid flow, arranged in the inlet flow route, thus preventing particles from being carried to the at least one movable component. Such an arrangement ensures that particles carried along with the fluid flow do not drift to the movable component, where any particle contamination could result in excessive wear or even malfunction of movable component. Consequently, the operational life of the movable component is effectively extended. It should be noted, that the inlet flow route may comprise one or more casing pipes or drill rods, and consequently, the at least one capturing element does not necessarily need to reside in a portion of the inlet flow route immediately adjacent to the drill device.
At least one capturing element may be provided as a magnetic element 5a; 5b arranged in the inlet flow route 3 such that the fluid flow therein passes the magnetic element. Moreover, such a capturing element provided as a magnetic element 5b may be arranged, for example to at least partially circumferentially surround at least a section of the inlet flow route 3. Preferably, but not necessarily, such a capturing element may be provided as an annular magnetic element 5a circumferentially extending over the whole circumference of inlet flow route. Alternatively, such a capturing element may be provided as multiple magnetic elements circumferentially extending over the circumference of inlet flow route, either as a whole or as discrete annular segments. Moreover, such magnetic elements 5a, 5b may be provided as a piece comprising magnetic material, or a component capable of generating a magnetic field when provided with an electrical current, for example. In the case of the latter, a piece comprising a coil for inducing a magnetic field, when an electric current is passed through said coil, may be used.
At least one capturing element may be provided as a screen element 5c extending over a cross sectional flow area of the inlet flow route 3. Using a screen 5c element provides the additional benefit that the size of the captured particles can be determined by choosing a screen element having corresponding mesh count. Particularly, the size of the particles plays a crucial role on how harmful said particles are to the movable component, particularly so in the case of a reciprocating piston 2a of a percussion device 2.
At least one capturing element may be provided as a cyclonic separator element. That is, a vortex is generated in the fluid flow such that the undesired particles, being heavier that the fluid, are separated towards the outer periphery of the vortex by rotational forces. For example, this may be implemented, by providing a flow deflector, such as one or more inclined or helical surfaces within the inlet flow route inducing a vortex to the fluid flow. Moreover, an annular cavity opening towards the direction from which the fluid flow is received may be provided on the outer periphery of the inlet flow route for receiving and collecting the particles separated from the fluid flow by the rotational forces. The remaining fluid flow may then be directed towards the movable component from the inner portion of the generated vortex within the inlet flow route. Moreover, the cavity on the outer periphery may additionally have at least one opening towards the inner portion of the inlet flow route for enabling possible oil droplets to drain back to the fluid flow for enabling lubrication. Such an opening may suitably be provided with an element permeable to fluids for maintaining separated solids particles within the cavity.
Using, in addition to a magnetic element 5a; 5b, a screen element 5c, a cyclonic separator element, or both, provides a synergistic effect, as particles harmful due to their size and/or weight, in addition to ferromagnetic particles harmful due to their material, i.e. abrasiveness, are both captured. Moreover, as the mesh size of the screen element can be dimensioned to capture only larger particles, unrestricted flow of the fluid past the screen element can be ensures, i.e the screen element can be dimensioned so that the relatively smaller particles do not block it. Moreover, the cyclonic separator element may be dimensioned to separate particles based on their weight, with a given operational fluid velocity.
In an embodiment of the first aspect of the disclosure, the drill device assembly 1 may be a drill bit for rotary drilling, comprising at least one roller cone. Particularly, a roller cone, namely the bearing or bearing arrangement thereof would thus constitute a movable component
In an embodiment of the first aspect of the disclosure, the drill device assembly 1 may be a percussion device assembly, that is the drill device assembly 1 comprises a percussion device 2 having a fluid actuated reciprocating piston 2a for providing percussive impacts for at least a drill tool 8 subsequent of the drill device assembly 2. Such a percussion device may, for example, be a DTH hammer.
The drill device assembly 1 further comprises an inlet flow route 3 for receiving a fluid flow from a portion of the drill string preceding the drill device assembly 1 and conducting said fluid flow to the reciprocating piston 2a, and a discharge flow route 4 for discharging fluid flow form the reciprocating piston.
Moreover, the drill device assembly 1 further comprises at least one capturing element 5a; 5b for recovering particles from a fluid flow, the capturing element being arranged in the inlet flow route 3, thus preventing particles from being carried to the reciprocating piston 2a by the fluid flow.
Such an arrangement ensures that particles carried along with the fluid flow do not drift to the reciprocating piston 2a, where any particle contamination could result in excessive wear or even malfunction of the percussion device 2. Consequently, the operational life of the percussion device 2 is effectively extended.
In a further embodiment according to the first aspect of the present disclosure, the drill device assembly 1 further comprises a check valve 6. The check valve 6 has an engaging element 6a biased against a valve seat 6b, arranged so as to prevent fluid flow from the reciprocating piston 2a to the inlet flow route 3. Most suitably, the check valve 6 is arranged within the inlet flow route 3. Moreover, at least one capturing element may be provided as a magnetic element 5a arranged in connection with the engaging element 6a. This is a particularly suitable arrangement for providing a capturing element to a pre-existing drill device assembly, as a check-valve 6 is commonly already present. A drill device assembly may thus be easily provided with a capturing element, simply by replacing the pre-existing engaging member with an engaging member 6a having a magnetic element 5a arranged in connection therewith in accordance with the present disclosure.
For example, an engaging member 6a comprising a magnetic element 5a may be provided. Preferably, but not necessarily, such magnetic element 5a is at least partly covered by a sealing material 6c such that sealing material abuts the valve seat 6b when the check valve 6 is in closed position. Alternatively, or in additionally, the corresponding valve seat 6b may also be at least partly covered by a sealing material 6c.
Most suitably, a portion of the engaging element 6a facing the valve seat 6b is equipped with a recess 6d. Such a recess 6d enables holding particles recovered from the fluid flow. The recess 6d may be implemented, for example, by providing the portion of the engaging element 6a facing the valve seat 6d with a concave shape.
In another embodiment according to the present disclosure, the drill device assembly 1 may further comprise a backhead 7 attached to, and preceding the percussion device 2, for removably enclosing the percussion device, and for enabling coupling thereof to a portion of a drill string preceding the drill device assembly 1. In such a case, at least one capturing element 5a; 5b; 5c for recovering particles from a fluid flow may be arranged in a portion of the inlet flow route 3 formed by an inside of the backhead 7.
This provides the advantage that the capturing elements may be accessed for maintenance simply by removing the backhead 7 without further disassembly. Moreover, this can be done in connection with routine maintenance of the percussion device. Additionally, capturing elements may be provided to pre-existing percussion devices by replacing a pre-existing backhead with a backhead according to the disclosure.
Moreover, should the drill device assembly 1 be of the construction having, in addition to a backhead 7, also a check valve 6, the valve seat 6b may suitably be formed as a surface of the backhead 7 facing the percussion device 2.
In drill device assembly equipped with a backhead 7, a circumferential recess 7a may be provided on the inside of backhead for receiving at least one capturing element 5b; 5c, namely a magnetic element 5b, a screen element 5c, or both. Preferably, but not necessarily, such a recess 7a is shaped so as to open towards the percussion device 2. The recess 7a may, for example, be further adapted for receiving an annular sleeve 7b for securing the capturing element(s) 5b; 5c in place. The annular sleeve 7b, in turn, may be coupled to the backhead 7 by any suitable means, such as a threaded connection, press fitting, shrink fitting, or by using pins or other fasteners. Moreover, a valve seat 6b may be provided as surface of the annular sleeve 7b facing the percussion device 2.
According to a second aspect of the present disclosure, a drill string assembly is provided. Such a drill string assembly comprises a drill device assembly 1 according to any of the embodiments of the first aspect. Moreover, a plurality of drill rods, coupled one after another, are provided. The lowermost of the drill rods is coupled to, and precedes the drill device assembly 1. Moreover, a drill tool 8, such as a drill bit, is suitably coupled subsequent to the drill device assembly. If the drill device assembly is of the type having a rotary drill bit as the drill device, an additional drill tool is not necessary, as said rotary drill bit is also the drill tool. Moreover, no percussion device is required in connection with a rotary drill bit.
According to a third aspect of the present disclosure, an engaging member 6a of a check valve 6 is provided. Particularly, the engaging member 6a is arranged for use in a drill device assembly 1 according to any of the embodiments according to the first aspect equipped with a check valve. The engaging member 6a comprises a magnetic element 5a arranged as a capturing element for, when in use, capturing ferromagnetic particles passing said engaging member 6a.
This is a particularly suitable arrangement for providing a capturing element 5a to a preexisting drill device assembly, as a check-valve is commonly already present. A drill device assembly 1 may thus be easily be provided with a capturing element 5a, simply by replacing the pre-existing engaging member with an engaging member 6a having a magnetic element 5a arranged in connection therewith in accordance with the present disclosure.
For example, an engaging member 6a comprising a magnetic element 5a may be provided. Preferably, but not necessarily, such a magnetic element 5a is at least partly covered by a sealing material 6c so that sealing material abuts the valve seat 6b when the check valve 6 is in the closed position.
Most suitably, a portion of the engaging element 6a facing, when in use, the valve seat 6b is equipped with a recess 6d, preferably opening towards upstream flow route 3. Such a recess enables holding particles recovered from the fluid flow. The recess may be implemented, for example, by providing the portion of the engaging element 6a facing the valve seat 6b with a concave shape. It should be noted, however, that such a recess enabling holding particles recovered from the fluid flow may be implemented as any other shape.
According to a fourth aspect of the present disclosure a backhead 7 is provided. Particularly, the backhead 7 is arranged for use in a drill device assembly 1 according to any of embodiments according to the first aspect of the description employing a percussion device 2. The backhead 7 is attachable to a percussion device 2 so as to precede it, and to removably enclose the percussion device 2. Moreover, the backhead 7 is further arranged for enabling coupling of the percussion device 2 to a portion of a drill string preceding the drill device assembly 1. The backhead 7 comprises at least one capturing element 5b; 5c arranged, when in use, in a portion of an inlet flow route 3 formed by an inside of the backhead 7 for recovering particles from a fluid. Namely, the capturing element may be a magnetic element 5b. In addition to the magnetic element 5b, a screen element 5c may also be used. A circumferential recess 7a may be provided on the inside of backhead 7, surrounding the inlet flow route 3, for receiving at least one capturing element, namely a magnetic element 5b, or additionally, also a screen element 5c. Preferably, but not necessarily, such a recess 7a is shaped so as to open, when in use, towards the percussion device 2. The recess may 7a, for example, be further adapted for receiving an annular sleeve 7b for securing the capturing element(s) 5b; 5c in place. The annular sleeve 7b, in turn, may be coupled to the backhead 7 by any suitable means, such as a threaded connection, press fitting, shrink fitting, or by using pins or other fasteners. Moreover, a valve seat 6b may be provided as surface of the annular sleeve 7b facing, when in use, the percussion device 2.
Fig. 1 illustrates a cross-sectional view of a drill string assembly is according to an embodiment of the disclosure. The drill string assembly comprises a percussion device 2 and a backhead 7. Although not illustrated in Fig. 1, a drill string assembly further comprises a plurality of drill rods, coupled one after another, such that the lowermost of the drill rods is coupled to, and precedes the drill device assembly 1. Moreover, a drill tool 8, namely a drill bit, is coupled subsequent to the drill device assembly 2. The drill device assembly 2 has an inlet flow route 3, formed partially by the inside of the backhead and partially by the percussion device 2, for conveying a fluid flow to a reciprocating piston 2a. Within this inlet flow route 3, a check valve 6 is provided. In connection with the engaging member 6a of the check valve, a magnetic element 5a is provided as a capturing element. Moreover, the drill device assembly 2 has a discharge flow route 4 for discharging fluid flow from the reciprocating piston 2a.
Fig. 2 illustrates a cross-sectional view of a drill device assembly 2 according to an embodiment of the disclosure. Particularly, Fig. 2 illustrates a detailed view of the drill device assembly 2 of Fig. 1. The drill device assembly 1 comprises a percussion device 2 onto which a backhead 7 is coupled so as to precede the percussion device. The drill device assembly 1 is equipped with check valve 6 (illustrated in the open state) having an engaging member 6a biased against a valve seat 6b. Moreover, the engaging member 6a comprises capturing element provided as a magnetic element 5a for capturing ferromagnetic particles from a fluid flow passing the check valve 6. The magnetic element 5a is partly covered with a sealing material 6c arranged to abut against the valve seat 6b, when the check valve 6 is in closed state. A recess 6d has been provided on a surface of the engaging member 6a facing valve seat 6b. Namely, said recess 6d has been provided as a concave portion on a surface of the engaging element 6a facing the valve seat 6b. To be more specific, the recess 6d has been formed on the sealing material 6c partly surrounding the magnetic element 5a.
Fig. 3 illustrates a cross-sectional view of a drill device assembly 1 according to another embodiment of the disclosure. As opposed to the arrangement of Fig. 2, the engaging member 6a of the check valve 6 is not equipped with a capturing element. Instead, the capturing element is provided in connection with the backhead 7. Namely, the capturing element is provided as an annular magnetic element 5b circumferentially surrounding a section of the inlet flow route 3 in a portion thereof formed by an inside of the backhead 7. The magnetic element 5b is received in a circumferential recess 7a provided on the inside of backhead 7 opening towards the percussion device 2. An annular sleeve 7b is also received in the recess for securing the magnetic element 5b in place. The annular sleeve 7b, in turn, is coupled to the backhead 7 by a threaded connection. Moreover, the valve seat 6b is provided as surface of the annular sleeve 7b facing the percussion device 2.
Fig. 4 illustrates a cross-sectional view of a drill device assembly 1 according to a further embodiment of the disclosure. Particularly, the embodiment of Fig. 4 incorporates the magnetic element 5a provided in connection with the biasing member 6a of the check valve, as presented in Fig. 2, in addition to the annular magnetic element 5b received in the recess 7a of the backhead 7, as presented in Fig. 3.
Fig. 5 illustrates a cross-sectional view of a drill device assembly 1 according to yet another embodiment of the disclosure. Particularly, the embodiment of Fig. 5 is of a similar construction to that presented in Fig. 4, with the exception of having a screen element 5c received in the recess 7a of the backhead instead of the annular magnetic element 5b. The screen element 5c extends over a cross sectional flow area of the inlet flow route 3, thus preventing particles larger than the mesh size of the screen from being conveyed to the reciprocating piston 2a by the fluid flow.
Fig. 6 illustrates a cross-sectional view of a drill device assembly 1 according to another embodiment of the disclosure. Particularly, the embodiment of Fig. 5 is of a similar construction to that presented in Fig. 3, with the exception of additionally having a screen element 5c received in the recess 7a of the backhead together with the annular magnetic element 5b. Although the screen element 5c is illustrated as being placed subsequent of the annular magnetic element 5b, the skilled person would appreciate that screen element 5c could alternatively be places precedingly to the annular magnetic element 5b. Moreover, the screen element 5c extends over a cross sectional flow area of the inlet flow route 3, thus preventing particles larger than the mesh size of the screen from being conveyed to the reciprocating piston 2a by the fluid flow.
Fig. 7 illustrates a cross-sectional view of a drill device assembly 1 according to another embodiment of the disclosure. Particularly, the embodiment of Fig. 7 is of a similar construction to that presented in Fig. 6, with the exception of additionally having the magnetic element 5a provided in connection with the biasing member 6a of the check valve, as presented in Fig. 2.
Claims (13)
- PATENTTIVAATIMUKSET1. Poralaitekokoonpano (1), käsittäen:- poralaitteen (2), jolla on ainakin yksi liikutettava komponentti (2a), jolloin käytettäessä fluidivirtaus ohjataan liikutettavan komponentin (2a) ohi ja mainitulla5 liikuteltavalla komponentilla on liike muuhun poralaitekokoonpanoon nähden;- tulovirtausreitti (3) fluidivirtauksen vastaanottamiseksi porajonon poralaitekokoonpanoa (1) edeltävältä osuudelta ja mainitun fluidivirtauksen ohjaamiseksi mainitun ainakin yhden liikutettavan komponentin (2a) ohitse, ja- poistovirtausreitti (4) fluidivirtauksen poistamiseksi mainitulta ainakin yhdeltä10 liikuteltavalta komponentilta (2a), jolloin poralaitekokoonpano (1) lisäksi käsittää ainakin yhden sieppauselementin (5a, 5b, 5c) partikkeleiden talteen ottamiseksi fluidivirtauksesta järjestettynä tulovirtausreittiin (3), estäen täten partikkeleiden kulkeutumisen mainitulle ainakin yhdelle liikuteltavalle komponentille (2a),15 jolloin poralaite on perkussiolaite (2), jossa mainittu ainakin yksi liikutettava komponentti on fluidikäyttöinen edestakaisin liikutettava mäntä (2a) perkussiivisten iskujen aikaansaamiseksi ainakin yhdelle poralaitekokoonpanoa (1) seuraavalle poraustyökalulle (8), jossa:- tulovirtausreitti (3) on järjestetty fluidivirtauksen vastaanottamiseksi porajonon20 poralaitekokoonpanoa edeltävältä osiolta ja mainitun fluidivirtauksen ohjaamiseksi edestakaisin liikutettavalle männälle (2a), ja- poistovirtausreitti (4) on järjestetty fluidin poistamiseksi edestakaisin liikuteltavalta männältä (2a), poralaitekokoonpanon (1) käsittäessä lisäksi ainakin yhden sieppauselementin (5a,25 5b, 5c) partikkeleiden talteen ottamiseksi fluidivirtauksesta järjestettynä tulovirtausreittiin (3), estäen täten partikkeleiden kulkeutumisen edestakaisin liikuteltavalle männälle (2a) fluidivirtauksen mukana, jolloin poralaitekokoonpano käsittää lisäksi vastaventtiilin (6), jolla on venttiilin istukkaa (6b) vasten jännitetty sulkuelin (6a) järjestettynä estämään fluidivirtauksen 30 edestakaisin liikuteltavalta männältä tulovirtausreittiin, tunnettu siitä, että ainakin yksi sieppauselementti (5a) on toteutettu magneettisena elementtinä järjestettynä sukuelimen yhteyteen.20175512 PRH 25 -09- 2018
- 2. Patenttivaatimuksen 1 mukainen poralaitekokoonpano (1), tunnettu siitä, että ainakin yksi sieppauselementti on toteutettu magneettisena elementtinä (5a, 5b) järjestettynä tulovirtausreittiin (
- 3) siten, että tämän läpi kulkeva fluidivirtaus kulkee magneettisen elementin ohitse.5 3. Patenttivaatimuksen 1 tai 2 mukainen poralaitekokoonpano (1), tunnettu siitä, että mainittu ainakin yksi sieppauselementti on toteutettu magneettisena elementtinä (5b järjestettynä ainakin osittain tulovirtausreitin (3) osuuden ympärystä ainakin osittain ympäröiden.
- 4. Jonkin patenttivaatimuksista 1-3 mukainen poralaitekokoonpano (1), tunnettu siitä,10 että ainakin sieppauselementti (5c) on toteutettu verkkoelementtinä ulottuen tulovirtausreitin (3) virtauspoikkileikkauksen ylitse.
- 5. Jonkin patenttivaatimuksista 1-4 mukainen poralaitekokoonpano (1), tunnettu siitä, että ainakin yksi sieppauselementti on syklonierotinelementti.
- 6. Jonkin patenttivaatimuksista 1-5 mukainen poralaitekokoonpano (1), tunnettu siitä,15 että sulkuelin (6a) käsittää ainakin osittain tiivistysmateriaalin (6c) peittämän magneettisen elementin (5a) siten, että tiivistysmateriaali on venttiilin istukkaa (6b) vasten kun vastaventtiili (6) on suljetussa asennossa.
- 7. Jonkin patenttivaatimuksista 1-6 mukainen poralaitekokoonpano (1), tunnettu siitä, että sulkuelementin (6a) tulovirtausreittiä kohden oleva osuus on varustettu20 syvennyksellä (6d) fluidivirtauksesta kerättyjen partikkeleiden pitämiseksi.
- 8. Patenttivaatimuksen 7 mukainen poralaitekokoonpano (1), tunnettu siitä, että syvennys (6d) on toteutettu sulkuelementin (6a) venttiilin istukkaa (6b) kohden olevana koverana osuutena.
- 9. Jonkin patenttivaatimuksista 1-8 mukainen poralaitekokoonpano (1), tunnettu siitä,25 että poralaitekokoonpano käsittää lisäksi takapäädyn (7) liitettynä perkussiolaitteeseen (2) ja tätä edeltäen perkussiolaitteen sulkemiseksi irrotettavasti, ja poralaitekokoonpanon kytkemisen mahdollistamiseksi poralaitekokoonpanoa (1) edeltävän porajonon osuuteen, ja ainakin yhden sieppauselementin (5a; 5b; 5c) partikkeleiden talteen ottamiseksi 30 fluidivirtauksesta ollessa järjestettynä tulovirtausreitin (3) osuuteen, joka on takapäädyn sisäosan muodostama.
- 10. Jonkin patenttivaatimuksista 1-8 mukainen poralaitekokoonpano (1), tunnettu siitä, että poralaitekokoonpano käsittää lisäksi takapäädyn (7) liitettynä perkussiolaitteeseen (2) ja tätä edeltäen perkussiolaitteen sulkemiseksi irrotettavasti, ja poralaitekokoonpanon kytkemisen mahdollistamiseksi poralaitekokoonpanoa (1)5 edeltävän porajonon osuuteen, ja ainakin yhden sieppauselementin (5a; 5b; 5c) partikkeleiden talteen ottamiseksi fluidivirtauksesta, järjestettynä tulovirtausreitin (3) osuuteen, joka on takapäädyn sisäosan muodostama, jolloin venttiilin istukka (6b) on muodostettu takapäädyn (7) perkussiolaitetta (2) 10 kohden olevana pintana.
- 11. Patenttivaatimuksen 9 tai 10 mukainen (1), tunnettu siitä, että takapääty (7) käsittää tämän sisäpuolella olevan kehämäisen syvennyksen magneettisen elementin (5b) verkkoelementin (5c) tai syklonisen elementin, tai minkä tahansa näiden yhdistelmän, vastaanottamiseksi, mainitun syvennyksen (7a) avautuessa soveltuvasti kohti15 perkussiolaitetta (2).
- 12. Porajonokokoonpano, tunnettu siitä, että se käsittää:jonkin patenttivaatimuksista 1-11 mukaisen poralaitekokoonpanon (1);useita porakankia kytkettynä peräkkäin, joista alimmaisen ollessa kytkettynä poralaitekokoonpanoon (1) tätä edeltäen, ja soveltuvasti,20 poratyökalun (8) kytkettynä poralaitekokoonpanolle jälkeisesti.20175512 prh 25 -09- 2018
- 13. Vastaventtiilin (6) sukuelin (6a) käytettäväksi jonkin patenttivaatimuksista 1-11 mukaisessa poralaitekokoonpanossa (1), tunnettu siitä, että mainittu sukuelin (6a) käsittää magneettisen elementin (5a) järjestettynä sieppauselementiksi mainitun sukuelimen (6a) ohitse kulkevien ferromagneettisten partikkeleiden talteen ottamiseksi käytön aikana.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20175512A FI127692B (fi) | 2017-06-05 | 2017-06-05 | Poralaitekokoonpano, porajonokokoonpano varustettuna poralaitekokoonpanolla, sekä päätykappale ja takaiskuventtiilin kytkeytyvä elin käytettäväksi poralaitekokoonpanossa |
| PCT/FI2018/050420 WO2018224732A1 (en) | 2017-06-05 | 2018-06-04 | A drill device assembly, a drill string assembly having such a drill device assembly, and a backhead and a check valve engaging member for use in a drill device assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20175512A FI127692B (fi) | 2017-06-05 | 2017-06-05 | Poralaitekokoonpano, porajonokokoonpano varustettuna poralaitekokoonpanolla, sekä päätykappale ja takaiskuventtiilin kytkeytyvä elin käytettäväksi poralaitekokoonpanossa |
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| Publication Number | Publication Date |
|---|---|
| FI127692B true FI127692B (fi) | 2018-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI20175512A FI127692B (fi) | 2017-06-05 | 2017-06-05 | Poralaitekokoonpano, porajonokokoonpano varustettuna poralaitekokoonpanolla, sekä päätykappale ja takaiskuventtiilin kytkeytyvä elin käytettäväksi poralaitekokoonpanossa |
Country Status (2)
| Country | Link |
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| WO (1) | WO2018224732A1 (fi) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE1951244A1 (en) | 2019-10-31 | 2021-04-20 | Epiroc Drilling Tools Ab | Pneumatic drill hammer comprising a boost chamber and a drilling rig comprising such a drill hammer |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6170581B1 (en) * | 1998-06-12 | 2001-01-09 | Ingersoll-Rand Company | Backhead and check valve for down-hole drills |
| US20020053428A1 (en) * | 1999-11-30 | 2002-05-09 | Walter Maples | Reverse circulation junk basket |
| IES20040482A2 (en) * | 2004-07-16 | 2006-01-25 | Minroc Techn Promotions Ltd | A down-the-hole hammer |
| GB0505166D0 (en) * | 2005-03-14 | 2005-04-20 | Stewart Arthur | Multi-function downhole tool |
| DE102010050244B4 (de) * | 2010-10-30 | 2013-10-17 | Technische Universität Bergakademie Freiberg | Meißeldirektantrieb für Werkzeuge auf Basis einer Wärmekraftmaschine |
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2017
- 2017-06-05 FI FI20175512A patent/FI127692B/fi not_active IP Right Cessation
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- 2018-06-04 WO PCT/FI2018/050420 patent/WO2018224732A1/en active Application Filing
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|---|---|
| WO2018224732A1 (en) | 2018-12-13 |
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