CA2535215C - System, method and apparatus for desanding wellhead production - Google Patents
System, method and apparatus for desanding wellhead production Download PDFInfo
- Publication number
- CA2535215C CA2535215C CA002535215A CA2535215A CA2535215C CA 2535215 C CA2535215 C CA 2535215C CA 002535215 A CA002535215 A CA 002535215A CA 2535215 A CA2535215 A CA 2535215A CA 2535215 C CA2535215 C CA 2535215C
- Authority
- CA
- Canada
- Prior art keywords
- vessel
- fluid
- nozzle
- fluid inlet
- inlet
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 11
- 238000004519 manufacturing process Methods 0.000 title description 8
- 239000012530 fluid Substances 0.000 claims abstract description 103
- 210000001015 abdomen Anatomy 0.000 claims abstract description 7
- 239000000725 suspension Substances 0.000 claims abstract description 7
- 238000007599 discharging Methods 0.000 claims description 10
- 230000003628 erosive effect Effects 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 description 15
- 239000000835 fiber Substances 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 241000237858 Gastropoda Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/35—Arrangements for separating materials produced by the well specially adapted for separating solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2221/00—Applications of separation devices
- B01D2221/04—Separation devices for treating liquids from earth drilling, mining
Abstract
A desanding vessel is connected to a fluid stream containing entrained particulates flowing from a wellhead. The vessel comprises an upper freeboard volume wherein the fluid velocity drops and particulates fall from suspension. Preferably the fluid stream is introduced through a replaceable nozzle offset upwardly from an axis of a horizontally-oriented cylindrical vessel and released particulates failing to accumulate in a lower belly portion. The nozzle extends into the vessel and beyond the inlet lend of the vessel so as to minimize wear to the vessel. The nozzles are flange for replaceable connection to the vessel.
Description
1 "SYSTEM, METHOD AND APPARATUS FOR
2 DESANDING WELLHEAD PRODUCTION"
3
4 FIELD OF THE INVENTION
The present invention relates to apparatus and methodology for the 6 removal of particulates such as sand from fluid streams produced from a well while 7 minimizing erosion of the involved equipment.
Production from wells in the oil and gas industry often contains 11 particulates. These particulates could be part of the formation from which the 12 hydrocarbon is being produced, introduced particulates from hydraulic fracturing or 13 fluid loss material from drilling mud or fracturing fluids or from a phase changes of 14 produced hydrocarbons caused by changing conditions at the wellbore (asphalt or wax formation). As the particulates are produced, problems occur due to abrasion, 16 and plugging of production equipment. In a typical startup after fracturing, a 17 stimulated well may produce sand until the well has stabilized, sometimes up to a 18 month.
19 In the case of gas wells, fluid velocities can be high enough that the erosion of the production equipment is severe enough to cause catastrophic failure.
21 High velocities are typical and are even designed for elutriating particles up the well 22 and to the surface. An erosive failure of this nature can become a serious safety 23 and environmental issue for the well operator. In all cases, particulate production 1 contaminates surface equipment and produced fluids and impairs the normal 2 operation of the oil and gas gathering systems and process facilities.
3 In one prior art system, a pressurized tank ("P Tank") is placed on the 4 wellsite and the well is allowed to produce fluid and particulates into this tank until sand production ceases. The large size of the tank usually restricts the maximum 6 operating pressure of the vessel to something in the order of 1,000 - 2,100 kPa. In 7 the case of a gas well, this requires some pressure control to be placed on the well 8 to protect the P Tank. Further, for a gas well, the pressure reduction usually is 9 associated with an increase in gas velocity which in turn makes the sand laden well effluent much more abrasive. Other problems associated with this type of desanding 11 technique are that it is a temporary solution. If the well continues to make sand, the 12 solution becomes prohibitively expensive. In most situations with this kind of 13 temporary solution, the gas vapors are not conserved and sold as a commercial 14 product.
An alternate known prior art system includes employing filters to 16 remove particulates. A common design is to have a number of fibre mesh bags 17 placed inside a pressure vessel. The fibre density is matched to the anticipated 18 particulate size. Filter bags are generally not effective in the removal of particulates 19 in a multiphase conditions. Usually multiphase flow in the oil and gas operations is unstable. Large slugs of fluid followed by a gas mist is common. In these cases, the 21 fibre bags become a pressure drop point and often fail due to the liquid flow through 22 filter. Due to the high chance of failure, the filter may not be trusted to remove 23 particulates in critical applications or where the flow parameters of a well are 1 unknown. An additional problem with filters in most jurisdictions is associated with 2 cost of disposal. The fibre bags are considered to be contaminated with 3 hydrocarbons and must be disposed of in accordance to local environmental 4 regulations.
Clearly there is a need for more versatile and cost effective system.
2 Apparatus is provided which is placed adjacent to the wellhead for 3 intercepting wellhead fluid flow before and prior to entry to any operator's equipment 4 including separators, valves, chokes and all other downstream equipment.
A pressure vessel is inserted in the flowsteam by connecting it 6 adjacent to the wellhead and to the input high velocity field piping extending from the 7 wellhead. The vessel contains a freeboard volume having a cross-sectional area 8 which is greater than that of the field piping from whence the fluids emanate. As a 9 result, fluid velocity drops and particulates cannot be maintained in suspension. The freeboard cross-sectional area is maintained through a downcomer weir or 11 depending nozzle at the vessel's exit which ensures that a minimum freeboard 12 volume and cross-sectional area is maintained for the collection of particulates, and 13 promotes maximum use of the freeboard area, thereby reducing the number of times 14 maintenance of the system, by cleaning the freeboard area of accumulated particulates, need be conducted. A nozzle conducts the fluid stream into the vessel 16 through a discharge which extends beyond the fluid inlet and into the freeboard 17 volume which minimizes localized wear. More preferably, the nozzle is connected to 18 an eccentric fitting at the fluid inlet for discharging the fluid stream into the freeboard 19 volume along a path P offset upwardly and substantially parallel to the axis A of the vessel.
2 Figure 1 is a cross-sectional side view of one embodiment of the 3 invention;
4 Figure 2 is a typical installation for wellsite service, such as that provided on a portable trailer; and 6 Figure 3 is a performance graph of the achievable gas rates while still 7 achieving particulate removal.
The present invention relates to apparatus and methodology for the 6 removal of particulates such as sand from fluid streams produced from a well while 7 minimizing erosion of the involved equipment.
Production from wells in the oil and gas industry often contains 11 particulates. These particulates could be part of the formation from which the 12 hydrocarbon is being produced, introduced particulates from hydraulic fracturing or 13 fluid loss material from drilling mud or fracturing fluids or from a phase changes of 14 produced hydrocarbons caused by changing conditions at the wellbore (asphalt or wax formation). As the particulates are produced, problems occur due to abrasion, 16 and plugging of production equipment. In a typical startup after fracturing, a 17 stimulated well may produce sand until the well has stabilized, sometimes up to a 18 month.
19 In the case of gas wells, fluid velocities can be high enough that the erosion of the production equipment is severe enough to cause catastrophic failure.
21 High velocities are typical and are even designed for elutriating particles up the well 22 and to the surface. An erosive failure of this nature can become a serious safety 23 and environmental issue for the well operator. In all cases, particulate production 1 contaminates surface equipment and produced fluids and impairs the normal 2 operation of the oil and gas gathering systems and process facilities.
3 In one prior art system, a pressurized tank ("P Tank") is placed on the 4 wellsite and the well is allowed to produce fluid and particulates into this tank until sand production ceases. The large size of the tank usually restricts the maximum 6 operating pressure of the vessel to something in the order of 1,000 - 2,100 kPa. In 7 the case of a gas well, this requires some pressure control to be placed on the well 8 to protect the P Tank. Further, for a gas well, the pressure reduction usually is 9 associated with an increase in gas velocity which in turn makes the sand laden well effluent much more abrasive. Other problems associated with this type of desanding 11 technique are that it is a temporary solution. If the well continues to make sand, the 12 solution becomes prohibitively expensive. In most situations with this kind of 13 temporary solution, the gas vapors are not conserved and sold as a commercial 14 product.
An alternate known prior art system includes employing filters to 16 remove particulates. A common design is to have a number of fibre mesh bags 17 placed inside a pressure vessel. The fibre density is matched to the anticipated 18 particulate size. Filter bags are generally not effective in the removal of particulates 19 in a multiphase conditions. Usually multiphase flow in the oil and gas operations is unstable. Large slugs of fluid followed by a gas mist is common. In these cases, the 21 fibre bags become a pressure drop point and often fail due to the liquid flow through 22 filter. Due to the high chance of failure, the filter may not be trusted to remove 23 particulates in critical applications or where the flow parameters of a well are 1 unknown. An additional problem with filters in most jurisdictions is associated with 2 cost of disposal. The fibre bags are considered to be contaminated with 3 hydrocarbons and must be disposed of in accordance to local environmental 4 regulations.
Clearly there is a need for more versatile and cost effective system.
2 Apparatus is provided which is placed adjacent to the wellhead for 3 intercepting wellhead fluid flow before and prior to entry to any operator's equipment 4 including separators, valves, chokes and all other downstream equipment.
A pressure vessel is inserted in the flowsteam by connecting it 6 adjacent to the wellhead and to the input high velocity field piping extending from the 7 wellhead. The vessel contains a freeboard volume having a cross-sectional area 8 which is greater than that of the field piping from whence the fluids emanate. As a 9 result, fluid velocity drops and particulates cannot be maintained in suspension. The freeboard cross-sectional area is maintained through a downcomer weir or 11 depending nozzle at the vessel's exit which ensures that a minimum freeboard 12 volume and cross-sectional area is maintained for the collection of particulates, and 13 promotes maximum use of the freeboard area, thereby reducing the number of times 14 maintenance of the system, by cleaning the freeboard area of accumulated particulates, need be conducted. A nozzle conducts the fluid stream into the vessel 16 through a discharge which extends beyond the fluid inlet and into the freeboard 17 volume which minimizes localized wear. More preferably, the nozzle is connected to 18 an eccentric fitting at the fluid inlet for discharging the fluid stream into the freeboard 19 volume along a path P offset upwardly and substantially parallel to the axis A of the vessel.
2 Figure 1 is a cross-sectional side view of one embodiment of the 3 invention;
4 Figure 2 is a typical installation for wellsite service, such as that provided on a portable trailer; and 6 Figure 3 is a performance graph of the achievable gas rates while still 7 achieving particulate removal.
5 2 As shown in Fig. 1, a desander 10 comprises a substantially horizontal, 3 cylindrical, pressure vessel 11 having an inlet end 23 adapted for connection to a 4 wellhead piping 9 and fluid stream F, typically gas G and sand S. As stated in the background and below, the fluid stream F may also contain liquid L.
6 A fluid inlet 12 comprises a nozzle 21 extending into an upper
7 freeboard 30 volume adjacent the top of the vessel 11. An eccentric fitting 31 shifts
8 the axis A of the vessel 11 downward to form a belly storage portion 32 for receiving
9 and temporarily storing sand S. The nozzle 21 extends beyond the fluid inlet 12 of the vessel 11 and into the freeboard 30 which minimizes localized wear. As shown 11 in Fig. 1, the nozzle is connected to the fluid inlet 12 at a flange 22 and discharges 12 the fluid stream F along a path P which is substantially parallel to the axis A of the 13 vessel11.
14 Gas G containing sand S enters through the fluid inlet 12 and is received by a larger cross-sectional area of the freeboard 30. The velocity slows 16 and sand falls out of suspension. The freeboard 30 is maintained using means to 17 ensure that the particulate free fluid is collected by an outlet 13 from mid-vessel.
18 This is achieved using either flow barrier such as a weir 40 as shown or by inserting 19 the fluid outlet into the vessel 11, away from the vessel wall.
As shown in Fig. 1, if a weir 40 is used, it is spaced from the fluid inlet 21 12 and positioned between the fluid inlet 12 and the fluid outlet 13.
1 As shown in Fig. 1, both a weir 40, and a fluid outlet 13, having a 2 downwardly extending portion which extends into the vessel 11, are used as a flow 3 barrier in a preferred embodiment.
4 The fluid outlet 13 for the vessel 11 is preferably perpendicular and upward, drawing from the lower level of the freeboard 30 volume.
6 A quick release pressure-vessel compatible cleanout 50 is provided for 7 sand removal access. The vessel 11 must be depressurized before opening and 8 cleaning out particulates. Manual cleanout is performed although automated 9 cleanout could be incorporated without diverging from the intent of the invention.
A typical vessel 11 may be a 6" diameter, schedule 160 shell having a 11 capacity for 8 million cubic feet of gas G per day and a corresponding and typical 12 collection rate of 1.5 gallons of particulates per day.
13 The advantages of the system include:
14 ~ As the desander is more cost effective than a "P Tank", the desander can be economically placed on a well for long term 16 (substantially permanent) sand protection;
17 ~ With a pressure rating that allows it to operate at the wells 18 conditions, minimal pressure drop is experienced across the 19 vessel. The desander is designed to exceed ASME code for pressure vessels. This permits the sand to be removed from 21 the flow stream without becoming erosive.
22 ~ Since the vessel is passive and has no moving parts, plugging 23 caused by particulates is not an issue. Sand is removed 1 mechanically from the vessel at regular intervals. By removing 2 the sand prior to it entering the producing system, contamination 3 of equipment and produced fluids is avoided.
4 ~ The vessel is capable of handling multiphase production and has demonstrated the ability to remove sand from both gas and 6 oil streams. This results in a wider application than the filter 7 methods.
14 Gas G containing sand S enters through the fluid inlet 12 and is received by a larger cross-sectional area of the freeboard 30. The velocity slows 16 and sand falls out of suspension. The freeboard 30 is maintained using means to 17 ensure that the particulate free fluid is collected by an outlet 13 from mid-vessel.
18 This is achieved using either flow barrier such as a weir 40 as shown or by inserting 19 the fluid outlet into the vessel 11, away from the vessel wall.
As shown in Fig. 1, if a weir 40 is used, it is spaced from the fluid inlet 21 12 and positioned between the fluid inlet 12 and the fluid outlet 13.
1 As shown in Fig. 1, both a weir 40, and a fluid outlet 13, having a 2 downwardly extending portion which extends into the vessel 11, are used as a flow 3 barrier in a preferred embodiment.
4 The fluid outlet 13 for the vessel 11 is preferably perpendicular and upward, drawing from the lower level of the freeboard 30 volume.
6 A quick release pressure-vessel compatible cleanout 50 is provided for 7 sand removal access. The vessel 11 must be depressurized before opening and 8 cleaning out particulates. Manual cleanout is performed although automated 9 cleanout could be incorporated without diverging from the intent of the invention.
A typical vessel 11 may be a 6" diameter, schedule 160 shell having a 11 capacity for 8 million cubic feet of gas G per day and a corresponding and typical 12 collection rate of 1.5 gallons of particulates per day.
13 The advantages of the system include:
14 ~ As the desander is more cost effective than a "P Tank", the desander can be economically placed on a well for long term 16 (substantially permanent) sand protection;
17 ~ With a pressure rating that allows it to operate at the wells 18 conditions, minimal pressure drop is experienced across the 19 vessel. The desander is designed to exceed ASME code for pressure vessels. This permits the sand to be removed from 21 the flow stream without becoming erosive.
22 ~ Since the vessel is passive and has no moving parts, plugging 23 caused by particulates is not an issue. Sand is removed 1 mechanically from the vessel at regular intervals. By removing 2 the sand prior to it entering the producing system, contamination 3 of equipment and produced fluids is avoided.
4 ~ The vessel is capable of handling multiphase production and has demonstrated the ability to remove sand from both gas and 6 oil streams. This results in a wider application than the filter 7 methods.
Claims (21)
EXCLUSIVE PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS
FOLLOWS:
1. A desanding system comprising:
a cylindrical pressure vessel having a horizontal axis and a fluid inlet adjacent a first inlet end of the vessel and adapted for receiving a fluid stream containing entrained particulates, the vessel having a freeboard volume adjacent a top of the vessel, a belly storage portion for accumulating particulates and a fluid outlet being spaced horizontally from the inlet, the cross-sectional area of the freeboard portion being greater than that of the fluid inlet so that the velocity of the fluid stream in the freeboard volume is less than that at the fluid inlet such that the entrained particulates fall out of suspension and into the belly storage portion; and a nozzle adapted for connection to the fluid stream and connected to an eccentric fitting at the fluid inlet for offsetting the nozzle upwardly from the axis of the vessel, the nozzle extending beyond the fluid inlet into the vessel for discharging the fluid stream into the freeboard volume.
a cylindrical pressure vessel having a horizontal axis and a fluid inlet adjacent a first inlet end of the vessel and adapted for receiving a fluid stream containing entrained particulates, the vessel having a freeboard volume adjacent a top of the vessel, a belly storage portion for accumulating particulates and a fluid outlet being spaced horizontally from the inlet, the cross-sectional area of the freeboard portion being greater than that of the fluid inlet so that the velocity of the fluid stream in the freeboard volume is less than that at the fluid inlet such that the entrained particulates fall out of suspension and into the belly storage portion; and a nozzle adapted for connection to the fluid stream and connected to an eccentric fitting at the fluid inlet for offsetting the nozzle upwardly from the axis of the vessel, the nozzle extending beyond the fluid inlet into the vessel for discharging the fluid stream into the freeboard volume.
2. The desanding system of claim 1 wherein the nozzle is connected to the fluid inlet at a flange.
3. The desanding system of claim 1 or 2 wherein the fluid stream is discharged from the nozzle along a path substantially parallel to the axis of the vessel.
4. The desanding system of claim 1, 2 or 3 wherein the fluid outlet is sufficiently spaced from the fluid inlet so as to collect particulate free fluid.
5. A nozzle for discharging a fluid stream containing entrained particulates through a fluid inlet at a first inlet end of a cylindrical desanding vessel, the vessel having a horizontal axis, a freeboard volume adjacent a top of the vessel, and a fluid outlet spaced from the fluid inlet, the nozzle comprising:
a nozzle inlet adapted for receiving the fluid stream; and a nozzle discharge extending into the vessel, beyond the fluid inlet, and being offset upwardly from the axis of the vessel for discharging the fluid stream into the freeboard volume adjacent the top of the vessel and substantially parallel to the vessel's axis so as to minimize localized wear at the fluid inlet.
a nozzle inlet adapted for receiving the fluid stream; and a nozzle discharge extending into the vessel, beyond the fluid inlet, and being offset upwardly from the axis of the vessel for discharging the fluid stream into the freeboard volume adjacent the top of the vessel and substantially parallel to the vessel's axis so as to minimize localized wear at the fluid inlet.
6. The nozzle of claim 5 wherein the vessel has an eccentric fitting at the fluid inlet, the nozzle being adapted to the eccentric fitting for offsetting the fluid inlet upwardly from the axis of the vessel further comprising:
7. The nozzle of claim 5 or 6 further comprising a flange adapted for flanged connection to the fluid inlet of the vessel.
8. A method for minimizing erosion in a desanding vessel intercepting a fluid stream containing entrained particulates comprising:
providing a cylindrical pressure vessel having a horizontal axis and a fluid inlet adjacent a first inlet end of the vessel and a fluid outlet spaced from the fluid inlet;
receiving the fluid stream at a fluid inlet; and discharging the fluid stream containing entrained particulates through a nozzle supported in an eccentric fitting at the fluid inlet for offsetting the nozzle upwardly from the axis of the vessel, the nozzle extending into the vessel and beyond the fluid inlet for discharging the fluid stream into a freeboard volume.
providing a cylindrical pressure vessel having a horizontal axis and a fluid inlet adjacent a first inlet end of the vessel and a fluid outlet spaced from the fluid inlet;
receiving the fluid stream at a fluid inlet; and discharging the fluid stream containing entrained particulates through a nozzle supported in an eccentric fitting at the fluid inlet for offsetting the nozzle upwardly from the axis of the vessel, the nozzle extending into the vessel and beyond the fluid inlet for discharging the fluid stream into a freeboard volume.
9. The method of claim 8 further comprising connecting the nozzle at the fluid inlet at a flange.
10. The method of claim 8 or 9 further comprising discharging the fluid stream from the nozzle along a path substantially parallel to the axis of the vessel.
11. The method of claim 8, 9 or 10 further comprising:
maintaining a freeboard volume in the vessel, the freeboard volume having a cross-sectional area larger than that of the fluid inlet;
discharging the fluid stream into the freeboard volume for slowing the velocity of the fluid stream so that entrained particulates fall out of suspension; and collecting particulates which fall out of suspension from the fluid stream for accumulating particulates in a belly portion of the vessel prior to the fluid outlet.
maintaining a freeboard volume in the vessel, the freeboard volume having a cross-sectional area larger than that of the fluid inlet;
discharging the fluid stream into the freeboard volume for slowing the velocity of the fluid stream so that entrained particulates fall out of suspension; and collecting particulates which fall out of suspension from the fluid stream for accumulating particulates in a belly portion of the vessel prior to the fluid outlet.
12. The method of any one of claims 8 - 11 further comprising periodically depressurizing the vessel and cleaning out accumulated particulates.
13. A desanding system for wellhead effluent comprising:
a conduit for conducting a fluid stream containing entrained particulates from a wellhead;
a cylindrical pressure vessel having a horizontal axis and a fluid inlet adjacent a first inlet end of the vessel and adapted for receiving a fluid stream containing entrained particulates, the vessel having a freeboard volume adjacent a top of the vessel, a belly storage portion for accumulating particulates and a fluid outlet being spaced horizontally from the inlet, the cross-sectional area of the freeboard portion being greater than that of the fluid inlet so that the velocity of the fluid stream in the freeboard volume is less than that at the fluid inlet such that the entrained particulates fall out of suspension and into the belly storage portion; and a nozzle connected to the conduit for receiving the fluid stream and connected to the vessel at the fluid inlet, the nozzle extending into the vessel and beyond the fluid inlet and being offset upwardly from the axis of the vessel for discharging the fluid stream into the freeboard volume.
a conduit for conducting a fluid stream containing entrained particulates from a wellhead;
a cylindrical pressure vessel having a horizontal axis and a fluid inlet adjacent a first inlet end of the vessel and adapted for receiving a fluid stream containing entrained particulates, the vessel having a freeboard volume adjacent a top of the vessel, a belly storage portion for accumulating particulates and a fluid outlet being spaced horizontally from the inlet, the cross-sectional area of the freeboard portion being greater than that of the fluid inlet so that the velocity of the fluid stream in the freeboard volume is less than that at the fluid inlet such that the entrained particulates fall out of suspension and into the belly storage portion; and a nozzle connected to the conduit for receiving the fluid stream and connected to the vessel at the fluid inlet, the nozzle extending into the vessel and beyond the fluid inlet and being offset upwardly from the axis of the vessel for discharging the fluid stream into the freeboard volume.
14. The desanding system of claim 13 wherein the vessel further comprises an eccentric fitting at the fluid inlet, the nozzle being connected to the eccentric fltting for offsetting the nozzle upwardly from the axis of the vessel.
15. The desanding system of claim 13 or 14 wherein the nozzle is connected to the fluid inlet at a flange.
16. The desanding system of claim 13, 14 or 15 wherein the fluid stream is discharged from the nozzle along a path substantially parallel to the axis of the vessel.
17. The desanding system of any one of claims 13 - 16 wherein the fluid outlet is sufficiently spaced from the fluid inlet so as to collect particulate free fluid.
18. A system of replaceable nozzles for a cylindrical desanding vessel through which a fluid stream containing entrained particulates discharge into a first inlet end of the desanding vessel, the vessel having a horizontal axis, a freeboard volume adjacent a top of the vessel, and a fluid outlet spaced from the fluid inlet, the system comprising:
a flange at the fluid inlet end of the desanding vessel; and nozzles adapted for receiving the fluid stream, each nozzle adapted for connection to the flange and enabling replacing a worn nozzle with an unworn nozzle, and having a nozzle discharge extending into the vessel when connected to the vessel flange and extending beyond the first inlet end, the nozzle discharge being offset upwardly from the axis of the vessel for discharging the fluid stream into the freeboard volume adjacent the top of the vessel and substantially parallel to the vessel's axis so as to minimize localized wear at the fluid inlet.
a flange at the fluid inlet end of the desanding vessel; and nozzles adapted for receiving the fluid stream, each nozzle adapted for connection to the flange and enabling replacing a worn nozzle with an unworn nozzle, and having a nozzle discharge extending into the vessel when connected to the vessel flange and extending beyond the first inlet end, the nozzle discharge being offset upwardly from the axis of the vessel for discharging the fluid stream into the freeboard volume adjacent the top of the vessel and substantially parallel to the vessel's axis so as to minimize localized wear at the fluid inlet.
19. The replaceable nozzle system of claim 18 wherein the vessel further comprises an eccentric fitting at the fluid inlet end, the vessel flange being connected to the eccentric fitting and the nozzle being connected to the vessel flange of the eccentric fitting for offsetting the nozzle upwardly from the axis of the vessel.
20. The replaceable nozzle system of claim 18 or 19 wherein the fluid stream is discharged from the nozzle along a path substantially parallel to the axis of the vessel.
21. The replaceable nozzle system of claim 18, 19 or 20 wherein the fluid outlet is sufficiently spaced from the fluid inlet end so as to collect particulate free fluid.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002407554A CA2407554C (en) | 2002-10-10 | 2002-10-10 | Method and apparatus for desanding wellhead production |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002407554A Division CA2407554C (en) | 2002-10-10 | 2002-10-10 | Method and apparatus for desanding wellhead production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2535215A1 CA2535215A1 (en) | 2004-04-10 |
| CA2535215C true CA2535215C (en) | 2007-05-08 |
Family
ID=32331645
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002535215A Expired - Lifetime CA2535215C (en) | 2002-10-10 | 2002-10-10 | System, method and apparatus for desanding wellhead production |
| CA002407554A Expired - Lifetime CA2407554C (en) | 2002-10-10 | 2002-10-10 | Method and apparatus for desanding wellhead production |
| CA002526233A Pending CA2526233A1 (en) | 2002-10-10 | 2002-10-10 | Desanding apparatus and system |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002407554A Expired - Lifetime CA2407554C (en) | 2002-10-10 | 2002-10-10 | Method and apparatus for desanding wellhead production |
| CA002526233A Pending CA2526233A1 (en) | 2002-10-10 | 2002-10-10 | Desanding apparatus and system |
Country Status (1)
| Country | Link |
|---|---|
| CA (3) | CA2535215C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060978A (en) * | 2013-06-28 | 2014-09-24 | 中国石油天然气股份有限公司 | Multi-barrel cyclone desander and multi-barrel cyclone desanding method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265797B (en) * | 2008-04-30 | 2015-03-25 | 安东石油技术（集团）有限公司 | Flow string possessing water controlling valve and longitudinal rib |
| US8945395B2 (en) | 2011-11-29 | 2015-02-03 | Bonavista Energy Corporation | Settling vessel and method of use |
| US9938812B2 (en) | 2012-02-13 | 2018-04-10 | Specialized Desanders Inc. | Desanding apparatus and a method of using same |
| US9909405B2 (en) | 2012-02-13 | 2018-03-06 | Specialized Desanders Inc. | Desanding apparatus and a method of using same |
| US9327214B2 (en) | 2012-02-13 | 2016-05-03 | Specialized Desanders Inc. | Desanding apparatus and a method of using same |
| CA2836437A1 (en) | 2013-12-16 | 2015-06-16 | Specialized Desanders Inc. | An desanding apparatus and a method of using the same |
| CA2913814A1 (en) | 2014-12-04 | 2016-06-04 | Specialized Desanders Inc. | A desanding apparatus and a method of using same |
| CN107060722A (en) * | 2016-10-26 | 2017-08-18 | 胜利油田瑞特石油机械制造有限责任公司 | High pressure cyclone filtering type natural gas desander |
| US10967305B2 (en) | 2017-05-30 | 2021-04-06 | Specialized Desanders Inc. | Boundary layer modification in closely-spaced passages |
| WO2018218345A1 (en) | 2017-05-30 | 2018-12-06 | Specialized Desanders Inc. | Gravity desanding apparatus with filter polisher |
-
2002
- 2002-10-10 CA CA002535215A patent/CA2535215C/en not_active Expired - Lifetime
- 2002-10-10 CA CA002407554A patent/CA2407554C/en not_active Expired - Lifetime
- 2002-10-10 CA CA002526233A patent/CA2526233A1/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060978A (en) * | 2013-06-28 | 2014-09-24 | 中国石油天然气股份有限公司 | Multi-barrel cyclone desander and multi-barrel cyclone desanding method |
| CN104060978B (en) * | 2013-06-28 | 2017-06-23 | 中国石油天然气股份有限公司 | A kind of many hydrocyclones and desanding method |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2535215A1 (en) | 2004-04-10 |
| CA2407554C (en) | 2006-06-20 |
| CA2407554A1 (en) | 2004-04-10 |
| CA2526233A1 (en) | 2004-04-10 |
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