Phase Change Fluid Spring and Method for Use of Same

a fluid spring and phase change technology, applied in the field of fluid springs, can solve the problems of high pressure at the surface, commercially unreasonable or impractical to charge the fluid springs to these pressures at the surface, and the safety risk of operating personnel is very substantial,
US20090250224A1Inactive Publication Date: 2009-10-08HALLIBURTON ENERGY SERVICES INC
37 Cites 93 Cited by

Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
HALLIBURTON ENERGY SERVICES INC
Publication Date
2009-10-08
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

A phase change fluid spring (450) for actuating a downhole tool (50) in a wellbore. The phase change fluid spring (450) includes a housing (114) defining a fluid chamber (120) and a phase change fluid disposed within the fluid chamber (120). The phase change fluid is in a first phase and at a first pressure at the surface. The phase change fluid is in a second phase and at a second pressure in the wellbore, the second pressure being greater than the first pressure. The phase change fluid is operable to store and release energy downhole to actuate the downhole tool (50).
Need to check novelty before this filing date? Find Prior Art

Description

TECHNICAL FIELD OF THE INVENTION

[0001] This invention relates, in general, to a fluid spring operable to store and release energy downhole and, in particular, to a phase change fluid spring that contains a fluid that transitions from a liquid phase at a first pressure on the surface to a gas or supercritical phase at a second, higher pressure downhole.BACKGROUND OF THE INVENTION

[0002] Without limiting the scope of the present invention, its background is described with reference to the operation of annulus pressure responsive downhole tools, as an example.

[0003] In oil and gas wells, it is common to conduct well testing and stimulation operations to determine production potential and enhance that potential. Annulus pressure responsive downhole tools have been developed which operate responsive to pressure changes in the annulus between the testing string and the wellbore casing that can sample formation fluids for testing or circulate fluids therethrough. These tools typically incorpor...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More