US2584448A - Packer and slip assembly expanded by internal pressure - Google Patents

Packer and slip assembly expanded by internal pressure Download PDF

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Publication number
US2584448A
US2584448A US73472A US7347249A US2584448A US 2584448 A US2584448 A US 2584448A US 73472 A US73472 A US 73472A US 7347249 A US7347249 A US 7347249A US 2584448 A US2584448 A US 2584448A
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United States
Prior art keywords
packer
slips
sleeve
slip assembly
internal pressure
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Expired - Lifetime
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US73472A
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Hern Carl
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Individual
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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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/127—Packers; Plugs with inflatable sleeve
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
    • E21B33/1295—Packers; Plugs with mechanical slips for hooking into the casing actuated by fluid pressure

Definitions

  • This invention is particularly adaptable to slip constructions which are used in an oil well to hold a tool or packer against longitudinal movement within the bored well.
  • An object of my invention is to provide a novel slip assembly which is expanded by pressure within the string of pipe carrying the tool, this internal pressure being directed evenly against the slips to efiectively press the slips against the bore of the well.
  • Another object of my invention is to provide a novel device of the character stated, in which internal pressure in a string of pipe is exerted against an expandible sleeve, this expanding sleeve acting through wedges, which engage the slips and press the slips against the bore of the well.
  • Still another object is to provide a novel device of the character stated, which is simple in construction and effective in operation.
  • Figure 1 is a longitudinal, sectional view of my slip and packer assembly.
  • Figure 2 is a sectional view taken on line 22 of Figure 1.
  • the numeral I indicates a pipe string upon which the tool is mounted.
  • the pipe I screws into a collar 2, and a mandrel 3 is threaded into the collar 2.
  • a second collar 4 screws onto the lower end of the mandrel 3 and a packer 5 is mounted on the collar 4.
  • the packer 5 may be of the type disclosed in my co-pending application Serial Number 73,471, filed January 29, 1949, on cup type packer, or it may be any other type of tool or packer desired.
  • the expandable slip assembly 6 is mounted between the collars 2 and 4.
  • An elastic sleeve I surrounds the mandrel 3 and fits into a seat 8 in the collar 2, and a seat 9 in the collar 4.
  • a plurality of ports l0 extend through the wall of the mandrel 3V and ermit pressure in the pipe I to be exerted against the inside of :the elastic sleeve 1.
  • a plurality of wedge strips H fit against the outer face of the sleeve 1.
  • the inner faces of the wedges II are curved as shown at 12 so as to conform to the outer surface of the sleeve 1.
  • the outer faces of the wedges H are square and fit against the inner faces of the slips l3.
  • a plurality of these slips are provided around the sleeve 1, and the slips are pressed outwardly to engage the bore H! by hydraulic pressure within the pipe I.
  • a plurality of springs [5 are mounted on'the collar 2, and these springs press against the upper part of the slips l3, thus holding these slips in position in the tool.
  • a similar group of springs 16 are mounted on the collar 4, and engage the lower part of each of the slips [3. These springs permit the slips to move inwardly and outwardly, but hold them against accidental displacement.
  • a tubular mandrel said mandrel having holes extending through the wall thereof, an elastic sleeve surrounding said mandrel, a plurality of elongated slips circumferentially spaced around the sleeve, wedge strips arranged between the sleeve and the slips, each wedge strip engaging the sleeve and two adjacent slips whereby said slip are cammed outwardly on dilation of the sleeve.
  • a tubular mandrel said mandrel having holes extending through the wall thereof, an elastic sleeve surrounding said mandrel, a plurality of elongated slips circumferentially spaced around the sleeve, wedge strips arranged between the sleeve and the slips, each wedge strip engaging the sleeve and two adjacent slips whereby said slips are cammed outwardly on dilation of the sleeve, each of said wedge strips being substantially triangular in cross-section.

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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)
  • Earth Drilling (AREA)

Description

Feb. 5; 1952 c. H
RN PACKER AND SL AESEMBLY EXPANDED BY INT AL. PRESSURE Filed Jan. 29, 1949 INVENTOR. URL Hifl/V- ll TTOR/VEY- Patented Feb. 5, 1952 UNITED STATES FATENT OFFICE PACKER AND SLIP ASSEMBLY EXPANDED BY INTERNAL PRESSURE This invention relates to a packer and slip assembly, the slip assembly being expanded and set in the well by pressure exerted within the pipe string, which carries the tool.
This invention is particularly adaptable to slip constructions which are used in an oil well to hold a tool or packer against longitudinal movement within the bored well.
An object of my invention is to provide a novel slip assembly which is expanded by pressure within the string of pipe carrying the tool, this internal pressure being directed evenly against the slips to efiectively press the slips against the bore of the well.
Another object of my invention is to provide a novel device of the character stated, in which internal pressure in a string of pipe is exerted against an expandible sleeve, this expanding sleeve acting through wedges, which engage the slips and press the slips against the bore of the well.
Still another object is to provide a novel device of the character stated, which is simple in construction and effective in operation.
Other objects, advantages and features of invention may appear from the accompanying drawing, the subjoined detailed description, and the appended claims.
In the drawing:
Figure 1 is a longitudinal, sectional view of my slip and packer assembly.
Figure 2 is a sectional view taken on line 22 of Figure 1.
Referring more particularly to the drawing, the numeral I indicates a pipe string upon which the tool is mounted. The pipe I screws into a collar 2, and a mandrel 3 is threaded into the collar 2. A second collar 4 screws onto the lower end of the mandrel 3 and a packer 5 is mounted on the collar 4. The packer 5 may be of the type disclosed in my co-pending application Serial Number 73,471, filed January 29, 1949, on cup type packer, or it may be any other type of tool or packer desired. The expandable slip assembly 6 is mounted between the collars 2 and 4. An elastic sleeve I surrounds the mandrel 3 and fits into a seat 8 in the collar 2, and a seat 9 in the collar 4. A plurality of ports l0 extend through the wall of the mandrel 3V and ermit pressure in the pipe I to be exerted against the inside of :the elastic sleeve 1. A plurality of wedge strips H fit against the outer face of the sleeve 1. The inner faces of the wedges II are curved as shown at 12 so as to conform to the outer surface of the sleeve 1. The outer faces of the wedges H are square and fit against the inner faces of the slips l3. A plurality of these slips are provided around the sleeve 1, and the slips are pressed outwardly to engage the bore H! by hydraulic pressure within the pipe I.
A plurality of springs [5 are mounted on'the collar 2, and these springs press against the upper part of the slips l3, thus holding these slips in position in the tool. A similar group of springs 16 are mounted on the collar 4, and engage the lower part of each of the slips [3. These springs permit the slips to move inwardly and outwardly, but hold them against accidental displacement.
Having described my invention, I claim:
1. In a slip assembly a tubular mandrel, said mandrel having holes extending through the wall thereof, an elastic sleeve surrounding said mandrel, a plurality of elongated slips circumferentially spaced around the sleeve, wedge strips arranged between the sleeve and the slips, each wedge strip engaging the sleeve and two adjacent slips whereby said slip are cammed outwardly on dilation of the sleeve.
2. In a slip assembly a tubular mandrel, said mandrel having holes extending through the wall thereof, an elastic sleeve surrounding said mandrel, a plurality of elongated slips circumferentially spaced around the sleeve, wedge strips arranged between the sleeve and the slips, each wedge strip engaging the sleeve and two adjacent slips whereby said slips are cammed outwardly on dilation of the sleeve, each of said wedge strips being substantially triangular in cross-section.
CARL HERN.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 2,059,901 Parrish Nov. 3, 1936 2,228,243 Baker Jan. 14, 1941 2,361,094 Hammer Oct. 24, 1944 2,373,005 Baker Apr. 3, 1945
US73472A 1949-01-29 1949-01-29 Packer and slip assembly expanded by internal pressure Expired - Lifetime US2584448A (en)

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US73472A US2584448A (en) 1949-01-29 1949-01-29 Packer and slip assembly expanded by internal pressure

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2785758A (en) * 1954-04-02 1957-03-19 Baker Oil Tools Inc Apparatus for anchoring tubing strings in well bore conduits
US2807326A (en) * 1954-02-15 1957-09-24 Walter L Church Packer for well casing
US20050189121A1 (en) * 2002-04-05 2005-09-01 Baker Hughes Incorporated Expandable packer with mounted exterior slips and seal

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2059901A (en) * 1935-05-20 1936-11-03 Benjamin E Parrish Well packer
US2228243A (en) * 1939-12-23 1941-01-14 Baker Oil Tools Inc Releasable coupling
US2361094A (en) * 1941-05-09 1944-10-24 Security Engineering Co Inc Setting tool for use in wells
US2373005A (en) * 1941-08-19 1945-04-03 Baker Oil Tools Inc Retrievable well packer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2059901A (en) * 1935-05-20 1936-11-03 Benjamin E Parrish Well packer
US2228243A (en) * 1939-12-23 1941-01-14 Baker Oil Tools Inc Releasable coupling
US2361094A (en) * 1941-05-09 1944-10-24 Security Engineering Co Inc Setting tool for use in wells
US2373005A (en) * 1941-08-19 1945-04-03 Baker Oil Tools Inc Retrievable well packer

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2807326A (en) * 1954-02-15 1957-09-24 Walter L Church Packer for well casing
US2785758A (en) * 1954-04-02 1957-03-19 Baker Oil Tools Inc Apparatus for anchoring tubing strings in well bore conduits
US20050189121A1 (en) * 2002-04-05 2005-09-01 Baker Hughes Incorporated Expandable packer with mounted exterior slips and seal
US7387170B2 (en) 2002-04-05 2008-06-17 Baker Hughes Incorporated Expandable packer with mounted exterior slips and seal
WO2006119037A2 (en) * 2005-04-29 2006-11-09 Baker Hughes Incorporated Expandable packer with mounted exterior slips and seal
WO2006119037A3 (en) * 2005-04-29 2007-03-22 Baker Hughes Inc Expandable packer with mounted exterior slips and seal
GB2440073A (en) * 2005-04-29 2008-01-16 Baker Hughes Inc Expandable packer with with mounted exterior slips and seals
GB2440073B (en) * 2005-04-29 2010-09-01 Baker Hughes Inc Expandable packer with mounted exterior slips and seals
AU2011200481B2 (en) * 2005-04-29 2011-03-03 Baker Hughes Incorporated Expandable packer with mounted exterior slips and seal

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