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US 4,071,085 AGranted
Well head sealing system
OwnerDonovan B. Grable, Bill C. Laneyinventors
Life of this patent
Estimating the term…
Abstract
Well flow control apparatus includes a blow-out preventer or preventers removably installable in a well head. By-pass porting may be provided in the well head to by-pass the preventers; a shroud may be employed over the head to confine gases against leakage; and a special valve assembly may be provided to control production fluid flow.
Claims26
In well flow control apparatus,
- a. a tubular well head having side porting for flowing well production fluid sidewardly through the head, and
- b. blow-out preventer means downwardly received in the head interior for controlling the flow of well fluid sidewardly through the head via said porting, said means including generally radially deflectible annular packer structure, and
- c. an annular hanger landed in the head and suspending said packer structure, there being a zone in the head and within the packer structure to generally centrally receive an elongated member.
In well flow control apparatus,
- a. a tubular well head having side porting for flowing well production fluid sidewardly through the head, well tubing adapted to extend in a tubing zone in the head,
- b. blow-out preventer means downwardly received in the head interior for controlling the flow of well fluid sidewardly through the head via said porting,
- c. said blow-out preventer means including a first blow-out preventer with a first annular packer surrounding the tubing zone to control upward flow of well fluid in the annulus about the tubing and to a first side port therein, p1 d. and said blow-out preventer means including a second blow-out preventer with a second annular packer surrounding a rod zone above the tubing zone to control upward flow of well fluid from within the tubing and to a second side port in the head,
- e. at least one of said packers being deflectible.
1 more element
In well flow control apparatus,
- a. a tubular well head having side porting for flowing well production fluid sidewardly through the head, well tubing adapted to extend in a tubing zone in the head,
- b. blow-out preventer means downwardly received in the head interior for controlling the flow of well fluid sidewardly through the head via said porting, said means including annular packer structure certain of which is deflectible,
- c. said blow-out preventer means including a first blow-out preventer and said packer structure including an annular packer associated with the first preventer and surrounding the tubing zone to control upward flow of well fluid in the annulus about the tubing and to a first side port therein,
- d. there being a first annular hanger landed in the head and suspending said first annular packer.
1 more element
In well flow control apparatus,
- a. a tubular well head having side porting for flowing well production fluid sidewardly through the head, well tubing adapted to extend in a tubing zone in the head,
- b. blow-out preventer means downwardly received in the head interior for controlling the flow of well fluid sidewardly through the head via said porting, said means including annular packer structure,
- c. said blow-out preventer means including a first blow-out preventer with a first annular packer surrounding the tubing zone to control upward flow of well fluid in the annulus about the tubing and to a first side port therein,
- d. and a control valve assembly having a body defining an inlet in direct communication with said head first side port, said assembly including a stopper reciprocable within the body to control fluid flow therethrough to a body outlet, and a fluid pressure responsive actuator for the stopper, said actuator and body preventing escape of production fluid excepting via said body outlet when the stopper allows passage of production fluid through the body.
1 more element
Dependencies are inferred from the claim text.