WO2019018678A1 - Skive cut borehole screen end ring - Google Patents

Skive cut borehole screen end ring Download PDF

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Publication number
WO2019018678A1
WO2019018678A1 PCT/US2018/042941 US2018042941W WO2019018678A1 WO 2019018678 A1 WO2019018678 A1 WO 2019018678A1 US 2018042941 W US2018042941 W US 2018042941W WO 2019018678 A1 WO2019018678 A1 WO 2019018678A1
Authority
WO
WIPO (PCT)
Prior art keywords
assembly
base pipe
skive cut
screen
end ring
Prior art date
Application number
PCT/US2018/042941
Other languages
French (fr)
Inventor
Jai K. KOLI
Christophe Malbrel
Original Assignee
Baker Hughes, A Ge Company, Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baker Hughes, A Ge Company, Llc filed Critical Baker Hughes, A Ge Company, Llc
Priority to GB2001915.4A priority Critical patent/GB2579497A/en
Priority to CA3070715A priority patent/CA3070715A1/en
Priority to AU2018304375A priority patent/AU2018304375A1/en
Publication of WO2019018678A1 publication Critical patent/WO2019018678A1/en
Priority to NO20200152A priority patent/NO20200152A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02—Subsoil filtering
    • E21B43/08—Screens or liners
    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02—Subsoil filtering
    • E21B43/08—Screens or liners
    • E21B43/088—Wire screens
    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02—Subsoil filtering
    • E21B43/10—Setting of casings, screens, liners or the like in wells

Definitions

  • the field of the invention is screen construction for borehole use and more particularly end rings with a skive cut to allow fitment over the screen assembly built on base pipes with variable external dimension that further feature an end radial component directed toward the base pipe for welding the end ring to the base pipe.
  • Screens are used in borehole operations to control produced solids from the formation and to enable inflow through a surrounding pack of filtration material referred to as gravel when producing the formation.
  • One common design used for such purposes is known as a wire wrap screen.
  • a wire that has round or triangular cross-section with the flat side oriented outwardly is wrapped over a base pipe that features axially extending support members spaced about the periphery.
  • a protective jacket which is commonly a rolled sheet with punched openings is put over the wire wrap to protect the assembly when running in the hole and during operations to protect the wire wrap from direct impingement by creating a tortuous path for the flow to reach the wire wrap.
  • the base pipe is perforated under the wire wrap to allow the produced fluid to enter a tubing string, a part of which is formed by the base pipe.
  • end ring assemblies had to be stocked in a variety of internal dimensions for a given size to fit over the base pipe outside diameter with clearance small enough to allow the end ring to slide over an end of the base pipe while leaving a gap that could be seal welded.
  • the end ring assembly involved a base ring secured to the base pipe and an overlapping ring that went over an end of the screen jacket that was separately welded to the base ring secured around the outside of the base pipe.
  • These overlapping rings could be purpose machined for a specific design and shrink fit into position over the screen jacket. Welding the overlapping ring to the screen jacket also created risks of screen gage openings that required manual correction which was not favored by the end user.
  • the present invention seeks to improve the manufacturing process particularly for screens for borehole use and in the process reduce manufacturing cost by using an end ring assembly that combines a radial segment that fits over the base pipe with an overlapping segment that spans over the screen outer jacket while incorporating a skive cut in the entire assembly.
  • This construction maintains sand tight gap and allows a close fit of the overlapping segment while providing an undercut to allow the wire wrap screen end to contact an undercut defined by the end ring and integrated overlapping segment that are both skive cut.
  • a borehole screen such as one with a wire wrap/slip on screen on a base pipe with variable external dimensions features an end ring assembly that is one piece with a skive cut to allow fitment over a screen jacket that covers the wire wrap.
  • the assembly has a cylindrically shaped component to go over the screen jacket and a radial component at one end oriented toward the base pipe.
  • the assembly can be mounted over the base pipe without sliding the assembly over the end of a base pipe due to the skive cut. Relative sliding along the skive cut gets the desired dimension over the screen jacket to control sand inflow followed by the skive cut being sealed with a weld.
  • the radial component is attached to the base pipe such that two welds complete the end assembly of the screen.
  • FIG. 1 is a part section view of the end ring assembly showing the skive cut through the cylindrical and radial components
  • FIG. 2 is a perspective view of the view in FIG. 1.
  • FIG. 1 shows a part section view of a screen assembly 10 that has a base pipe 12 with openings 14.
  • a series of axially oriented and circumferentially spaced support rods 16 are covered with a wrapped wire 18 that can have a circular or triangular cross section for example. If the triangular section is used a flat side of each triangle is outwardly oriented and a point of the triangle is oriented toward the base pipe 12.
  • An end ring assembly 20 has a cylindrical component 22 overlapping the wrapped wire 18. In many cases the wrapped wire 18 is covered with an outer jacket that is not shown for protection of the wrapped wire 18 during running in and in use.
  • a radial component 24 extends integrally from an end of the cylindrical component 22 toward the base pipe 12.
  • the cut 26 extends at an angle from end 28 of the cylindrical component 22 to end 30 of the radial component 24.
  • the end ring assembly 20 is a split ring that can be opened at the skive cut 26 to be placed over the base pipe 12 without going over either end of the base pipe 12.
  • the skive cut 26 can be closed with ends 32 and 34 abutting or overlapping or both in the case where each end 32 and 34 is made with an adjacent step that can mesh together and slide relatively along the skive cut 26 as the internal diameter changes.
  • the skive cut 26 is welded followed by a weld 36 that is circumferential at end 30 to secure the end ring assembly 20 to the base pipe 12

Landscapes

  • Mining & Mineral Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Filtration Of Liquid (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Inorganic Fibers (AREA)

Abstract

A borehole screen such as one with a wire wrap/ slip on screen on a base pipe with variable external dimensions features an end ring assembly that is one piece with a skive cut to allow fitment over a screen jacket that covers the wire wrap. The assembly has a cylindrically shaped component to go over the screen jacket and a radial component at one end oriented toward the base pipe. The assembly can be mounted over the base pipe without sliding the assembly over the end of a base pipe due to the skive cut. Relative sliding along the skive cut gets the desired dimension over the screen jacket to control sand inflow followed by the skive cut being sealed with a weld. The radial component is attached to the base pipe such that two welds complete the end assembly of the screen.

Description

SKIVE CUT BOREHOLE SCREEN END RING
Inventors: Jai K. Koli and Christophe Malbrel FIELD OF THE INVENTION
[0001] The field of the invention is screen construction for borehole use and more particularly end rings with a skive cut to allow fitment over the screen assembly built on base pipes with variable external dimension that further feature an end radial component directed toward the base pipe for welding the end ring to the base pipe.
BACKGROUND OF THE INVENTION
[0002] Screens are used in borehole operations to control produced solids from the formation and to enable inflow through a surrounding pack of filtration material referred to as gravel when producing the formation. One common design used for such purposes is known as a wire wrap screen. In essence, a wire that has round or triangular cross-section with the flat side oriented outwardly is wrapped over a base pipe that features axially extending support members spaced about the periphery. A protective jacket which is commonly a rolled sheet with punched openings is put over the wire wrap to protect the assembly when running in the hole and during operations to protect the wire wrap from direct impingement by creating a tortuous path for the flow to reach the wire wrap. The base pipe is perforated under the wire wrap to allow the produced fluid to enter a tubing string, a part of which is formed by the base pipe.
[0003] The ends of the screen assembly need to be closed and this is done with end ring assemblies that are fitted around the base pipe and overlap the screen jacket and are welded or otherwise secured to a base pipe. Some examples of such designs are shown in US 8267169; US 8127447; US 5611399; US 6305468; US 6607032; US 6478092. One issue with assembling a variety of screens to meet different conditions is variation of screen jacket diameter due to tolerances of base pipe OD, wire dimensions and rib & wrap penetration. Typically the end ring assemblies had to be stocked in a variety of internal dimensions for a given size to fit over the base pipe outside diameter with clearance small enough to allow the end ring to slide over an end of the base pipe while leaving a gap that could be seal welded. Additionally the end ring assembly involved a base ring secured to the base pipe and an overlapping ring that went over an end of the screen jacket that was separately welded to the base ring secured around the outside of the base pipe. These overlapping rings could be purpose machined for a specific design and shrink fit into position over the screen jacket. Welding the overlapping ring to the screen jacket also created risks of screen gage openings that required manual correction which was not favored by the end user.
[0004] A compromise to address the dimensional variation of the screen assembly due to base pipe and other components' dimensional variations involved using two adjacent rings. The end ring was still custom machined for the application and the overlapping ring was skive cut to fit over the screen jacket. After fitting the overlapping ring and welding the skive cut in the overlapping ring, the overlapping ring had to be welded to the custom machined end ring that was in turn welded to the base pipe. Skive cuts in ring shaped objects are described in US 2005/0225037 and US 4840379.
[0005] The present invention seeks to improve the manufacturing process particularly for screens for borehole use and in the process reduce manufacturing cost by using an end ring assembly that combines a radial segment that fits over the base pipe with an overlapping segment that spans over the screen outer jacket while incorporating a skive cut in the entire assembly. This construction maintains sand tight gap and allows a close fit of the overlapping segment while providing an undercut to allow the wire wrap screen end to contact an undercut defined by the end ring and integrated overlapping segment that are both skive cut. With the skive cut through the assembly, no part of the assembly needs to be slipped over an end of the base pipe and the internal dimensions of the overlapping assembly and the end ring can be modified to get a snug fit and the skive cut welded to hold the desired dimension. The end ring is then secured to the base pipe such as by welding. These and other aspects of the present invention will become more readily apparent to those skilled in the art from a review of the description of the preferred embodiment and the associated drawings while recognizing that the full scope of the invention is to be determined from the appended claims. SUMMARY OF THE INVENTION
[0006] A borehole screen such as one with a wire wrap/slip on screen on a base pipe with variable external dimensions features an end ring assembly that is one piece with a skive cut to allow fitment over a screen jacket that covers the wire wrap. The assembly has a cylindrically shaped component to go over the screen jacket and a radial component at one end oriented toward the base pipe. The assembly can be mounted over the base pipe without sliding the assembly over the end of a base pipe due to the skive cut. Relative sliding along the skive cut gets the desired dimension over the screen jacket to control sand inflow followed by the skive cut being sealed with a weld. The radial component is attached to the base pipe such that two welds complete the end assembly of the screen.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] FIG. 1 is a part section view of the end ring assembly showing the skive cut through the cylindrical and radial components;
[0008] FIG. 2 is a perspective view of the view in FIG. 1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0009] FIG. 1 shows a part section view of a screen assembly 10 that has a base pipe 12 with openings 14. A series of axially oriented and circumferentially spaced support rods 16 are covered with a wrapped wire 18 that can have a circular or triangular cross section for example. If the triangular section is used a flat side of each triangle is outwardly oriented and a point of the triangle is oriented toward the base pipe 12. An end ring assembly 20 has a cylindrical component 22 overlapping the wrapped wire 18. In many cases the wrapped wire 18 is covered with an outer jacket that is not shown for protection of the wrapped wire 18 during running in and in use. A radial component 24 extends integrally from an end of the cylindrical component 22 toward the base pipe 12. A skive cut 26 shown gapped open for running in. The cut 26 extends at an angle from end 28 of the cylindrical component 22 to end 30 of the radial component 24. In essence the end ring assembly 20 is a split ring that can be opened at the skive cut 26 to be placed over the base pipe 12 without going over either end of the base pipe 12. The skive cut 26 can be closed with ends 32 and 34 abutting or overlapping or both in the case where each end 32 and 34 is made with an adjacent step that can mesh together and slide relatively along the skive cut 26 as the internal diameter changes. When the desired fit over the wire wrap 18 and the overlying screen jacket is achieved with relative movement between angle cut ends 32 and 34, the skive cut 26 is welded followed by a weld 36 that is circumferential at end 30 to secure the end ring assembly 20 to the base pipe 12
[0010] While the radial height of radial component 24 is fixed, its internal diameter is variable. Since the dimensions of the axial rods 16 and the wire wrap 18 along with any jacket that covers the wire wrap are typically well known and not subject to dimensional variability the undercut 38 is made to allow the cylindrical component 22 to fit snugly against the wire wrap 18 and a surrounding screen jacket as the inside diameter is varied with relative sliding movement of ends 32 and 34 until the inside surface 40 lands on the base pipe 12. At this point, the skive cut 26 which now has its gap nearly or completely closed can be welded between ends 28 and 30. When the skive cut 26 is welded after the relative sliding movement of ends 32 and 34, the weld 36 can be put down and the screen assembly 10 is completed at one end. The same procedure can be applied at an opposite end of the assembly 10.
[0011] The advantages can now readily be appreciated over a two piece system that required more welding and still needed a large end ring inventory to advance the right size over an end of a base pipe as a distinct cylindrical component is fitted over the screen and outer jacket assembly. Instead a single integrated design allows variability to place a radial component on or near an outer surface of the base pipe for a circumferential weld while providing an undercut for the known dimension of the screen assembly including the jacket so that the ends of the screen assembly are effectively sealed as a skive cut allows the radial component to approach the base pipe and the cylindrical overlapping component to fit snugly over the screen assembly as the skive cut is welded. Now two welds instead of three complete the end assembly for the screen and unique end ring inventory to account for outer wall dimension variability of the base pipe for a given size no longer is an issue. With the ability to make relative axial movements along the skive cut the desired dimension is obtained around the base pipe and an undercut offering a snug fit to the screen assembly is obtained at the same time. A skive weld and a circumferential weld to the base pipe of the radial component completes the operation. [0012] The above description is illustrative of the preferred embodiment and many modifications may be made by those skilled in the art without departing from the invention whose scope is to be determined from the literal and equivalent scope of the claims below:

Claims

We claim:
1. An end ring assembly (20) for a borehole screen assembly (16,18) mounted over a base pipe(12), characterized by:
a skive cut (26) at an angle extending between opposed ends (32, 34) of a of an end ring (22, 24) further comprising a cylindrical component (22)and an integral radial component (24), said radial component having an adjustable inner dimension (40) for selective fixation to the base pipe (12) as said cylindrical component (22) abuts the screen assembly (16,18).
2. The assembly of claim 1, wherein:
said radial component (24) extends from one of said ends.
3. The assembly of claim 1, wherein:
said skive cut (26) defined by opposed ends (32,34) that selectively abut each other during reduction of said adjustable inner dimension (40).
4. The assembly of claim 1, wherein:
said skive cut (26) defined by opposed ends (32,34) that selectively overlap each other during reduction of said adjustable inner dimension.
5. The assembly of claim 1, wherein:
said skive cut (26) defined by opposed ends (32,34) that selectively abut and overlap each other during reduction of said adjustable inner dimension.
6. The assembly of claim 1, wherein:
said skive cut (26) defined by opposed ends (32,34) that selectively slide relatively to each other during reduction of said adjustable inner dimension.
7. The assembly of claim 1, wherein:
said cylindrical component (22) defines an undercut between said end ring (22,24) and the base pipe (12) having a height of the screen assembly (16,18).
8. The assembly of claim 6, wherein:
said radial component is secured to the base pipe after said sliding relative to each other of said opposed ends (32,34) of said skive cut (26) and securing said ends to each other.
9. An assembly method for a borehole screen (16,18), characterized by:
overlaying a one piece end ring assembly (20) over a screen assembly; adjusting an internal dimension (40) of said end ring assembly (20) toward a base pipe (12) using a skive cut (26) extending from opposed ends (32,34) thereof;
securing said end ring assembly (20) to the base pipe.
10. The method of claim 9, wherein:
providing a cylindrical component (22) that transitions to a radial component (24) at one of said ends of said end ring.
11. The method of claim 9, wherein:
abutting opposing ends (32,34) that define said skive cut (26) when accomplishing said adjusting.
12. The method of claim 9, wherein:
overlapping opposing ends (32,34) that define said skive cut (26) when accomplishing said adjusting.
13. The method of claim 9, wherein:
overlapping and abutting opposing ends (32,34) that define said skive cut (26) when accomplishing said adjusting.
14. The method of claim 9, wherein:
relatively sliding opposed ends (32,34) that define said skive cut (26) when accomplishing said adjusting.
15. The method of claim 10, wherein:
welding an end of said radial component (24) to the base pipe after said adjusting.
16. The method of claim 10, wherein:
abutting said cylindrical component (22) to said borehole screen (16,18) as a result of said adjusting.
PCT/US2018/042941 2017-07-20 2018-07-19 Skive cut borehole screen end ring WO2019018678A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB2001915.4A GB2579497A (en) 2017-07-20 2018-07-19 Skive cut borehole screen end ring
CA3070715A CA3070715A1 (en) 2017-07-20 2018-07-19 Skive cut borehole screen end ring
AU2018304375A AU2018304375A1 (en) 2017-07-20 2018-07-19 Skive cut borehole screen end ring
NO20200152A NO20200152A1 (en) 2017-07-20 2020-02-06 Skive cut borehole screen end ring

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15/655,472 2017-07-20
US15/655,472 US20190024486A1 (en) 2017-07-20 2017-07-20 Skive Cut Borehole Screen End Ring

Publications (1)

Publication Number Publication Date
WO2019018678A1 true WO2019018678A1 (en) 2019-01-24

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ID=65015818

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2018/042941 WO2019018678A1 (en) 2017-07-20 2018-07-19 Skive cut borehole screen end ring

Country Status (6)

Country Link
US (1) US20190024486A1 (en)
AU (1) AU2018304375A1 (en)
CA (1) CA3070715A1 (en)
GB (1) GB2579497A (en)
NO (1) NO20200152A1 (en)
WO (1) WO2019018678A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU199502U1 (en) * 2020-06-04 2020-09-04 Общество с ограниченной ответственностью «ТАТПРОМ-ХОЛДИНГ» Downhole slotted wire strainer with direct winding on the casing

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11613969B2 (en) 2017-07-20 2023-03-28 Baker Hughes Holdings Llc Skive cut borehole screen end ring method of use
AU2022205954A1 (en) * 2021-01-11 2023-07-27 Baker Hughes Holdings Llc Skive cut borehole screen end ring method of use

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5131666A (en) * 1990-10-12 1992-07-21 Fisher Controls International, Inc. Zero clearance anti-extrusion rings for containment of ptfe packing
US5611399A (en) * 1995-11-13 1997-03-18 Baker Hughes Incorporated Screen and method of manufacturing
US20120037357A1 (en) * 2010-08-13 2012-02-16 Jean-Marc Lopez Crimped End Wrapped on Pipe Well Screen
US20130000890A1 (en) * 2011-06-28 2013-01-03 Weatherford/Lamb, Inc. Multiple Sectioned Wire-Wrapped Screens
US20130180733A1 (en) * 2012-01-18 2013-07-18 Halliburton Energy Services, Inc. Seal ring backup devices and methods for preventing extrusion

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4278277A (en) * 1979-07-26 1981-07-14 Pieter Krijgsman Structure for compensating for different thermal expansions of inner and outer concentrically mounted pipes
US5121666A (en) * 1991-03-06 1992-06-16 Jonathan Valen Wear pad assembly attachable to drum structure
NO972792L (en) * 1996-06-20 1997-12-22 Pall Corp Filter for underground use

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5131666A (en) * 1990-10-12 1992-07-21 Fisher Controls International, Inc. Zero clearance anti-extrusion rings for containment of ptfe packing
US5611399A (en) * 1995-11-13 1997-03-18 Baker Hughes Incorporated Screen and method of manufacturing
US20120037357A1 (en) * 2010-08-13 2012-02-16 Jean-Marc Lopez Crimped End Wrapped on Pipe Well Screen
US20130000890A1 (en) * 2011-06-28 2013-01-03 Weatherford/Lamb, Inc. Multiple Sectioned Wire-Wrapped Screens
US20130180733A1 (en) * 2012-01-18 2013-07-18 Halliburton Energy Services, Inc. Seal ring backup devices and methods for preventing extrusion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU199502U1 (en) * 2020-06-04 2020-09-04 Общество с ограниченной ответственностью «ТАТПРОМ-ХОЛДИНГ» Downhole slotted wire strainer with direct winding on the casing

Also Published As

Publication number Publication date
CA3070715A1 (en) 2019-01-24
GB202001915D0 (en) 2020-03-25
US20190024486A1 (en) 2019-01-24
AU2018304375A1 (en) 2020-02-13
NO20200152A1 (en) 2020-02-06
GB2579497A (en) 2020-06-24

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