Removable and reloadable orifice for a downhole tool
Inactive Publication Date: 2017-06-22
SCHLUMBERGER TECH CORP
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The present invention provides an apparatus for providing an activation pressure for a down hole tool located at a distal end of a tool string. The apparatus includes a pressure activated tool and a blocking body located in an opening through the tool string. The blocking body is formed of a material that can be dissolved by a solvent. The apparatus can provide a reduced opening through the blocking body to produce a pressure within the tool string sufficient to activate the tool at a first fluid flow rate through the tool string. The apparatus also includes a method for purging the blocking body and replacing it with a new blocking body in a second fluid flow rate. The technical effects of the invention include reducing the risk of damage to the down hole tool during operation and providing a reliable activation pressure for the tool.
Problems solved by technology
However, the presence of these orifices limits the rate that can be pumped down the coil (or drill pipe if used) due to the limited flow rate that is possible through such an orifice.
Additionally, it will be appreciated that the higher pressures produced within the tool string will also result in greater wear on the tool string which may be formed of coil tubing or the like.
Such removal operation is time consuming.
Method used
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[0022]At the outset, it should be noted that in the development of any such actual embodiment, numerous implementation—specific decisions must be made to achieve the developer's specific goals, such as compliance with system related and business related constraints, which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time consuming but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure. In addition, the composition used / disclosed herein can also comprise some components other than those cited. In the summary and this detailed description, each numerical value should be read once as modified by the term “about” (unless already expressly so modified), and then read again as not so modified unless otherwise indicated in context. Also, in the summary and this detailed description, it should be understood that a concentration range lis...
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Disclosed is an apparatus and method for providing an activation pressure for a down hole too comprising a tool string having a pressure activated tool located at a distal end thereof, an opening passing through the tool string from an interior to an exterior thereof and a blocking body locatable in said opening operable to block a portion of said opening while leaving a reduced opening therethrough selected to produce a pressure within the tool string sufficient to activate the tool at a first fluid flow rate, wherein the blocking body is formed of a material operable to be dissolved by a solvent. The method comprises pumping a fluid down the tool string at a first fluid flow rate to activate the tool, pumping a solvent down the tool string operable to dissolve the blocking body, pumping the fluid down the tool string at a second fluid flow rate above the first flow rate and transporting a replacement blocking body down the tool string to the opening.
Description
BACKGROUND[0001]1 Field[0002]The present disclosure relates generally to down hole tool activation and in particular to a selectably removable and reloadable orifice for providing an activation pressure for a downhole tool.[0003]2 Description of Related Art[0004]In the field of hydrocarbon development and production a variety of tools are frequently located down an oil well to perform a function. In many cases, the operation of the tool is not required or desired until located at a specific location within the oil well. Accordingly, such tools will require to be activated at such work location.[0005]Currently some downhole tools use an orifice to create differential pressures within the tool string to activate tools. However, the presence of these orifices limits the rate that can be pumped down the coil (or drill pipe if used) due to the limited flow rate that is possible through such an orifice. Additionally, it will be appreciated that the higher pressures produced within the too...
Claims
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Patent Timeline
Login to View More IPC IPC(8): E21B33/12
CPCE21B33/12E21B41/0078
Inventor LESKO, TIMOTHY M.PENA GONZALEZ, ALEJANDRO ANDRES
Owner SCHLUMBERGER TECH CORP