WO2018183080A1 - Filtre de tubage de fond de trou - Google Patents

Filtre de tubage de fond de trou Download PDF

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Publication number
WO2018183080A1
WO2018183080A1 PCT/US2018/023767 US2018023767W WO2018183080A1 WO 2018183080 A1 WO2018183080 A1 WO 2018183080A1 US 2018023767 W US2018023767 W US 2018023767W WO 2018183080 A1 WO2018183080 A1 WO 2018183080A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
downhole
mandrel
layer
concentrically surrounding
Prior art date
Application number
PCT/US2018/023767
Other languages
English (en)
Inventor
Ronald Neil Weathers
John L. MORTON III
Original Assignee
Stanley Filter Co., 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
Priority claimed from US15/469,741 external-priority patent/US20170204709A1/en
Application filed by Stanley Filter Co., LLC filed Critical Stanley Filter Co., LLC
Publication of WO2018183080A1 publication Critical patent/WO2018183080A1/fr

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

Definitions

  • This invention relates generally to a downhole tubing filter for use in oil, gas, and water wells, and in particular a downhole tubing filter element having a metallic mandrel surrounded by a metallic mesh filter media giving the filter improved permeability, resistance to chemical breakdown, and physical strength.
  • Oil and gas wells and water wells include a wellbore extending into a well to some depth below the surface.
  • the wellbore is lined with casing to strengthen the walls of the borehole.
  • the annular area formed between the casing and the borehole is typically filled with cement to permanently set the casing in the wellbore. The casing is then perforated to allow production fluids to enter the wellbore and be retrieved at the surface of the well.
  • a typical downhole arrangement would include a string composed of a series of tubes or tubing suspended from the surface.
  • One type of well-known pump is a downhole electrical submersible pump (ESP).
  • the ESP either includes or is connected to a downhole motor which is sealed so that the whole assembly is submerged in the fluid to be pumped.
  • the motor is connected to a power source at the surface and operates beneath the level of the fluid downhole in order to pump the fluid to the surface.
  • a component is connected to the motor which prevents well fluid from entering the motor and equalizes internal motor pressure with the well annulus pressure.
  • a number of factors may be detrimental to the production of the ESP, such as the presence of foreign solid particles, such as sand, sediment, and scale.
  • the amount and size of sand and other solid particles in the fluid may vary widely depending on the well and the conditions encountered.
  • fluids may be pumped down the well to stimulate production causing additional movement of sands and solids.
  • the sand and other solid particles act as abrasives and, over time, are damaging to the operation of the pump.
  • filters have been designed for use with ESPs.
  • Such filters typically include a filter element designed to screen solid particles from the pump intake; however, the filtered particulates often become entrapped in the filter element.
  • the amount of particulate material collected on the filter element is directly proportional to the to the pressure drop that occurs across the filter element. Since an excessive pressure drop across the filter element can significantly reduce fluid flow, the filter element must be periodically changed or cleaned. Often, this is done by removing the ESP from the fluid and removing the filter element. This can be a timely and inconvenient process.
  • Pumps with intricate backwashing systems have been designed, but these are often expensive and cannot be used to retrofit existing systems. As a result, many pumps are generally operated without any filter and therefore experience early pump failure and extensive and costly down time.
  • a problem associated with conventional downhole tubing filters arises in high temperature and/or high pressure applications.
  • Low gravity oils require higher well bore temperature as heavy oil has a tendency to hold the sand against the filter media causing premature failure.
  • High downhole temperatures are generally above 200°F and up to 450°F, while high downhole pressures are generally above 7,500 psi and up to 15,000 psi.
  • Another problem with downhole tubing filters occurs in both high pH (e.g., more than 8.0) and low pH (e.g., less than 6.0) environments. In these extreme downhole conditions, conventional filters become ineffective and suffer from degradation.
  • tubing filter element having a metallic mandrel surrounded by a metallic mesh filter media giving the downhole filter improved permeability, resistance to chemical breakdown, and physical strength.
  • the invention in general, in a first aspect, relates to a downhole tubing filter element having a metallic mandrel, and a metallic mesh filter media.
  • the mandrel is juxtaposed between opposing end fittings, and the opposing end fittings may include a first end fitting and a second end fitting attached to the mandrel and the metallic mesh filter media.
  • the mandrel has a plurality of diametrical perforations and an interior chamber aligned along an axial flow passage through the downhole tubing filter.
  • the end fittings having opposing generally planar axial open ends that are axially aligned and coaxially spaced along the flow passage.
  • the mesh filter media circumferentially surrounds the mandrel, and includes a single layer or multiple layers of woven wire mesh and metallic fibers.
  • the downhole tubing filter element may be encased within a perforated steel housing.
  • the mandrel is fabricated from stainless steel or carbon steel.
  • the filter media is fabricated from stainless steel, and the layer or layers of the filter media have a weave type selected from the group consisting of a plain wire cloth, a plain Dutch weave, a Twill Dutch weave, a Reverse Dutch Twill weave, or a reverse Dutch weave.
  • the filter media can have a drainage layer concentrically surrounding the mandrel and a filter layer concentrically surrounding the drainage layer or a drainage and support layer concentrically surrounding the mandrel and a filter layer concentrically surrounding the drainage and support layer.
  • the filter media can include a drainage layer concentrically surrounding the mandrel and a filter layer concentrically surrounding the drainage layer.
  • the filter media can have a drainage layer concentrically surrounding the mandrel, a support layer concentrically surrounding the drainage layer, a filter layer concentrically surrounding the support layer, and a protective layer concentrically surrounding the filter layer.
  • the filter media can have a nominal micron rating between about 80 and 150 microns or between about 115 and 150 microns.
  • the filter media can be constructed as a monolithic structure forming an integrated filter media.
  • the invention in general, in a second aspect, relates to a downhole filter comprising a tubing filter element having a metallic mandrel having a plurality of diametrical perforations and an interior chamber aligned along an axial flow passage through the downhole tubing filter element.
  • the filter element also includes a monolithic mesh filter media forming an integrated filter media.
  • the filter media circumferentially surrounds the mandrel, and the filter media is constructed from a stainless steel weave having a nominal micron rating between about 80 and 150 microns.
  • a first end fitting and a second end fitting respectively attached to opposing terminal ends of the filter element.
  • the tubing filter element can be removably housed within a perforated steel housing.
  • the mandrel can be fabricated from stainless steel or an investment cast precipitation- hardening corrosion-resistant carbon steel.
  • the layer or layers of the filter media may have a weave type selected from the group consisting of a plain wire cloth, a plain Dutch weave, a Twill Dutch weave, a Reverse Dutch Twill weave, or a reverse Dutch weave.
  • the filter media can be constructed with: a drainage layer concentrically surrounding the mandrel and a filter layer concentrically surrounding the drainage layer; a drainage and support layer concentrically surrounding the mandrel and a filter layer concentrically surrounding the drainage and support layer; a drainage layer concentrically surrounding the mandrel and a filter layer concentrically surrounding the drainage layer; or a drainage layer concentrically surrounding the mandrel, a support layer concentrically surrounding the drainage layer, a filter layer concentrically surrounding the support layer, and a protective layer concentrically surrounding the filter layer.
  • Figure 1 is a sectional, partial cutaway view of an example of a downhole tubing filter in accordance with an illustrative embodiment of the invention disclosed herein;
  • Figure 2 is an exploded view of the downhole tubing filter shown in Figure 1;
  • Figure 3 is an elevational view of an example of a tubing filter element in accordance with an illustrative embodiment of the invention disclosed herein;
  • Figure 4 is a cross-sectional view along A-A of the tubing filter element shown in Figure 3;
  • Figure 5 is a cross-sectional view of an end fitting of the tubing filter element shown in Figure 4;
  • Figure 6 is a cross-sectional view of another end fitting of the tubing filter element shown in Figure 4.
  • Figure 7 is a cross-sectional view of an example of a metallic mesh media in accordance with an illustrative embodiment of the invention disclosed herein;
  • Figure 8 is a cross-sectional view of another example of a metallic mesh media in accordance with an illustrative embodiment of the invention disclosed herein;
  • Figure 9 is a cross-sectional view of another example of a metallic mesh media in accordance with an illustrative embodiment of the invention disclosed herein.
  • Figure 10 is a cross-sectional view of another example of a metallic mesh media in accordance with an illustrative embodiment of the invention disclosed herein. DETAILED DESCRIPTION OF THE INVENTION
  • a downhole tubing filter includes a tubing filter element 10, which as shown in Figure 1 may be removably encased within a perforated steel housing 200.
  • the tubing filter element 10 can be used in a standalone rod pump application, with a mud anchor (not shown) in a rod pump application, in an ESP application, or in any other downhole pump application.
  • the downhole tubing filter can be used in vertical or horizontal well applications. As such, the downhole tubing filter element 10 has a bidirectional flow passage 26.
  • an annulus 202 is formed between the tubing filter element 10 and the steel housing 200.
  • the steel housing 200 includes a first terminal end 204 with an internally threaded section 206 that is connected to a connection fitting 216, which in turn may be connected to directly or indirectly with an intake end of a downhole pump (not shown) or may be connected to other downhole equipment, such as a tubing sub (not shown).
  • the steel housing 200 also includes a second terminal end 208 with an internally threaded section 210 that connects to a removable plug 212.
  • the housing 200 and the fitting 216 may be constructed of carbon steel.
  • the downhole tubing filter element 10 has a first end fitting 28, which may be connected to either an end plug 218 as shown in Figure 2 or directly or indirectly to the intake end of the downhole pump or other downhole equipment.
  • the end fitting 28 has a first terminal end with a reduced diameter neck 30 and a second terminal end with an internally threaded section 32 that receives an externally threaded section of the end plug 218 or other downhole equipment.
  • the first terminal end with the reduced diameter neck 30 is connect to a mandrel 42, and a continuous weld or a welding end ring 44 may be attached using one or more full penetration welds or the like.
  • a second end of the downhole tubing filter element 10 terminates in a second end fitting 34 with a first terminal end having an externally threaded section 38 that connects to the connection fitting 216 or other downhole equipment.
  • the second end fitting 34 also includes a second terminal end with a reduced diameter neck 40 that connects to a second terminating end of the mandrel 42.
  • the second end fitting 34 may be connected to the mandrel using a continuous weld or a welding end ring 46.
  • the mandrel 42 is connected intermediate of and juxtaposed between the first end fitting 28 and the second end fitting 34.
  • An interior chamber 48 within the mandrel 42 is axially aligned along the flow passage 26 through the downhole tubing filter element 10.
  • a central bore 50 in the first end fitting 28 and a central bore 52 in the second end fitting 34 have opposing generally planar axial or open ends that are axially aligned and coaxially spaced along the flow passage 26.
  • the mandrel 42 includes the first terminating end that abuts the neck 30 of the first end fitting 28 and the second terminating end that abuts the neck 40 of the second end fitting 34.
  • the mandrel 42 includes a plurality of diametrical perforations 54 along its length to permit fluids to pass from the well 12 into the interior chamber 98 within the mandrel 42.
  • the perforations 54 may be round as illustrated or may be slotted or a combination of holes and slots that are punched or drilled through the mandrel 42.
  • the mandrel 42 may be fabricated from stainless steel or investment cast precipitation- hardening corrosion-resistant steel, such carbon steel accompanied with upper and lower end fittings 28 and 34 constructed of a similar material.
  • a metallic mesh filter media 100 concentrically surrounds the mandrel 42. If the filter media 100 becomes clogged or damaged, the downhole tubing filter element 10 may be removed and replaced as necessary.
  • the filter element 100 may be constructed as a single standalone element or as stackable elements.
  • the filter media 100 is a stainless steel mesh media constructed to withstand very high or low pH environments as well as elevated temperatures and high pressure differentials.
  • the filter media 100 is constructed of single or multiple layers of woven wire mesh, metallic fibers and perforated steel, which are joined together using sintering or diffusion bonding to provide a monolithic structure and forms an integrated filter media. Sintering or diffusion bonding is a high temperature process that fuses tangent metal surfaces without the addition of filter metals or bonding agents.
  • the woven layer(s) of the filter media 100 can be a plain Dutch weave, a Twill Dutch weave, a Reverse Dutch Twill weave, a reverse Dutch weave or the like.
  • the filter media 100 can include a filter layer 102 and a drainage layer 104 concentrically surrounding the mandrel 42.
  • the filter media 100 can be constructed as a monolithic sandwich media having a protective layer 106 concentrically surrounding the filter layer 102, which in turn concentrically surrounds a support layer 108 and the drainage layer 104.
  • the filer media 100 can be constructed from concentric woven layers of the filter layer 102 and a drainage and support layer 110, as shown in Figure 9 from woven layers of the filter layer 102, the support layer 108 and the drainage layer 104 as illustrated in Figure 10.
  • the filter media 100 can have a nominal micron layer between 60 and 250, preferably between 80 and 150, and more preferably between 115 and 125.
  • the foregoing materials and micron ratings are merely examples that may be utilized in constructing the downhole tubing filter and other materials and micron ratings may be employed to suit the particular usage of the downhole tubing filter.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Filtering Materials (AREA)

Abstract

La présente invention concerne un filtre de tubage de fond de trou permettant d'éliminer le sable et d'autres particules solides du fluide de production dans un puits souterrain. Le filtre de tubage de fond de trou comprend un élément filtre ayant un mandrin perforé entouré par au moins un milieu filtrant constitué d'un matériau en treillis tissé en acier inoxydable destiné à procurer une perméabilité et une résistance améliorées vis-à-vis de forces chimiques et physiques.
PCT/US2018/023767 2017-03-27 2018-03-22 Filtre de tubage de fond de trou WO2018183080A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15/469,741 2017-03-27
US15/469,741 US20170204709A1 (en) 2013-08-13 2017-03-27 Downhole tubing filter

Publications (1)

Publication Number Publication Date
WO2018183080A1 true WO2018183080A1 (fr) 2018-10-04

Family

ID=63678179

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2018/023767 WO2018183080A1 (fr) 2017-03-27 2018-03-22 Filtre de tubage de fond de trou

Country Status (1)

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WO (1) WO2018183080A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996031271A1 (fr) * 1995-04-07 1996-10-10 Baker Hughes Incorporated Filtre a treillis de fil metallique
US5899271A (en) * 1996-08-08 1999-05-04 Purolator Products Company Particle control screen assembly for a perforated pipe used in a well, a sand filter system, and methods of making the same
US20020084070A1 (en) * 2000-09-11 2002-07-04 Voll Benn A. Multi-layer screen and downhole completion method
US20050126779A1 (en) * 2003-12-10 2005-06-16 The Cavins Corporation Seamless woven wire sintered well screen
US20150047830A1 (en) * 2013-08-13 2015-02-19 Stanley Filter Co., LLC Downhole filtration tool

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996031271A1 (fr) * 1995-04-07 1996-10-10 Baker Hughes Incorporated Filtre a treillis de fil metallique
US5899271A (en) * 1996-08-08 1999-05-04 Purolator Products Company Particle control screen assembly for a perforated pipe used in a well, a sand filter system, and methods of making the same
US20020084070A1 (en) * 2000-09-11 2002-07-04 Voll Benn A. Multi-layer screen and downhole completion method
US20050126779A1 (en) * 2003-12-10 2005-06-16 The Cavins Corporation Seamless woven wire sintered well screen
US20150047830A1 (en) * 2013-08-13 2015-02-19 Stanley Filter Co., LLC Downhole filtration tool

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