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GB1354899A - Well safety apparatus - Google Patents

Well safety apparatus

Info

Publication number
GB1354899A
GB1354899A GB1262871*[A GB1262871A GB1354899A GB 1354899 A GB1354899 A GB 1354899A GB 1262871 A GB1262871 A GB 1262871A GB 1354899 A GB1354899 A GB 1354899A
Authority
GB
United Kingdom
Prior art keywords
valve
annulus
openings
tubing
passage
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
Application number
GB1262871*[A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CAMCO Inc
Original Assignee
CAMCO Inc
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 CAMCO Inc filed Critical CAMCO Inc
Publication of GB1354899A publication Critical patent/GB1354899A/en
Expired legal-status Critical Current

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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
    • 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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
    • E21B34/105—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole retrievable, e.g. wire line retrievable, i.e. with an element which can be landed into a landing-nipple provided with a passage for control fluid
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7835—Valve seating in direction of flow
    • Y10T137/7836—Flexible diaphragm or bellows reactor

Landscapes

  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Pipe Accessories (AREA)
  • Tubes (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Safety Valves (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)

Abstract

1354899 Wells &c CAMCO INC 3 May 1971 [30 June 1970] 12628/71 Heading E1F A safety valve for use in well tubing comprises a tubular housing 42 having axially spaced seals 44, 46 and a telescopically movable member 52 having a plurality of pistons 56, 58, 60 co-operating with respective portions of the interior wall of the valve body and openings 62, 64, 66 to form expansible pressure chambers by which it is biassed downwardly in response to pressure in the annulus 40, surrounding the tubing, to force open a pivoted flap valve 48. The valve may be located in a tubing mandrel 12. The mandrel includes a passage 22 in which the valve is supported by latching dogs 90, and a passage 34 having openings 37 communicating with the annulus 40. Pressurized fluid in the annulus 40 passes via the openings 37 and passage 34, to the openings 62, 64 and 66 and depresses the pistons 56, 58 and 60 on the member 52 against the action of a spring 88 so that the flap valve is opened. The area of the lower end 86 of the member 52 is smaller than that of the upper end 84. Under normal flow conditions the flap valve is open. Reduction of the pressure in the annulus 40 allows the member 52 to rise and the flap valve closes under the action of a spring (not shown). Increase of pressure in the tubing below the valve beyond a predetermined value (e.g. if the well over produces) overcomes the effect of the difference in areas 86 and 84 and forces the member 52 upwards so that the flap valve closes. The seals 44, 46 prevent production from leaking into the annulus 40. The upper end of the passage 34 contains a plug 38 or a flow control unit for gas lift operations. When it is desired to retrieve the safety valve, the plug 38 &c is replaced by a blanking plug which seals off the openings 37. In a modifica tion, the mandrel is omitted and the valve is located in a section of tubing.
GB1262871*[A 1970-06-30 1971-05-03 Well safety apparatus Expired GB1354899A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US5119970A 1970-06-30 1970-06-30

Publications (1)

Publication Number Publication Date
GB1354899A true GB1354899A (en) 1974-06-05

Family

ID=21969918

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1262971*[A Expired GB1354900A (en) 1970-06-30 1971-05-03 Mandrels for use with well tubing
GB1262871*[A Expired GB1354899A (en) 1970-06-30 1971-05-03 Well safety apparatus

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB1262971*[A Expired GB1354900A (en) 1970-06-30 1971-05-03 Mandrels for use with well tubing

Country Status (2)

Country Link
US (1) US3627042A (en)
GB (2) GB1354900A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163794A (en) * 1984-08-29 1986-03-05 Camco Inc Fluid level controlled safety valve
GB2212840A (en) * 1987-11-27 1989-08-02 Camco Inc Well choke and kill control system

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3786863A (en) * 1973-03-30 1974-01-22 Camco Inc Well safety valve system
US3826309A (en) * 1973-05-11 1974-07-30 Camco Inc Well safety valve
US4119146A (en) * 1977-05-18 1978-10-10 Otis Engineering Corporation Surface controlled sub-surface safety valve
US4325431A (en) * 1980-07-10 1982-04-20 Ava International Corporation Flow controlling apparatus
US4454913A (en) * 1981-01-05 1984-06-19 Schlumberger Technology Corporation Safety valve system with retrievable equalizing feature
US4540047A (en) * 1981-02-17 1985-09-10 Ava International Corporation Flow controlling apparatus
US4552219A (en) * 1983-10-05 1985-11-12 Hydril Company Subsurface safety valve
US5054558A (en) * 1990-05-04 1991-10-08 Barneck Michael R Equalizing blank valve apparatus and methods
US20100122819A1 (en) * 2008-11-17 2010-05-20 Baker Hughes Incorporated Inserts with Swellable Elastomer Seals for Side Pocket Mandrels
CN107304661A (en) * 2016-04-19 2017-10-31 中国石油天然气股份有限公司 Single-flow valve assembly, gas lift valve, gas lift tool and integrated tubular column

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163794A (en) * 1984-08-29 1986-03-05 Camco Inc Fluid level controlled safety valve
GB2212840A (en) * 1987-11-27 1989-08-02 Camco Inc Well choke and kill control system
GB2212840B (en) * 1987-11-27 1991-08-14 Camco Inc Choke and kill control system

Also Published As

Publication number Publication date
GB1354900A (en) 1974-06-05
US3627042A (en) 1971-12-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PE20 Patent expired after termination of 20 years