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Rotatable flange adapter

a flange adapter and rotatable technology, applied in the direction of drilling casings, drilling pipes, borehole/well accessories, etc., can solve problems such as putting workers at risk

Inactive Publication Date: 2007-05-24
TEJAS RES & ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This rotation and lowering of the BOP to match flanges becomes an operation that can put workers at risk.

Method used

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Examples

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Embodiment Construction

[0023] Referring to FIG. 1, well 10 is being drilled in the earth. Conductor casing 11 has been placed in the well and the well has then been drilled below the conductor casing to a selected depth. Surface casing 12 has then been placed in the well and cemented in place. Casing head 14 has been attached to surface casing 12 and double studded adapter 20 has been attached to the casing head. Spool 16, having flanges 18 and 19, has been attached to the double studded adapter. The double studded adapter is necessary when flange 18 on spool 16 is smaller in size then the flange on casing head 14. With this equipment on the well, the well is to be drilled deeper toward a target in the earth. Before drilling proceeds below surface casing 12, it is necessary to attach a blowout preventer (BOP) to the casing in the well.

[0024] Referring to FIG. 2, blowout preventer stack 22 is to be attached to the well. Stack 22 is supported from beams 23 below the drilling rig floor. Supports 23A and hoi...

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PUM

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Abstract

Rotatable flange adaptor or rotatable flange is provided, such that bolt holes may be aligned for joining of flanges. A sealing device may be added to the hub of the adaptor, such that the sealing surfaces are not rotated. Keys are placed in races to provide for transmittal of force along the axis of the device while allowing rotary motion of a flange or flange adaptor.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] Apparatus for providing a rotatable pipe flange is provided. More particularly, a rotatable flange adapter or rotatable flange is provided that may be used, for example, on land drilling rigs between a blowout preventer and a flanged connector and for other applications. [0003] 2. Description of Related Art [0004] Normal practice in drilling of wells for hydrocarbon production is to place a blowout preventer (BOP) at the surface of the earth. This is a device designed to prevent flow outside the drill pipe should excess pressure be encountered during drilling of a well. When drilling a well that may encounter high pressure, a ram-type BOP is employed, along with an annular BOP and related equipment to form a “BOP stack.” The combined devices may weigh as much as 85,000 pounds or more. The rams may extend several feet in a vertical plane in each direction from the axis of the BOP. [0005] During drilling of wells, the...

Claims

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Application Information

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IPC IPC(8): E21B33/06
CPCE21B33/03E21B33/06
Inventor HOBDY, MILESHILL, THOMAS
Owner TEJAS RES & ENG