Downhole wireline tension measurement
Inactive Publication Date: 2015-01-29
GE OIL & GAS LOGGING SERVICES
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Benefits of technology
The present invention allows for the efficient and effective deployment of downhole tools in wellbores. It can use wireline, coiled tubing, or slickline as a conveyance means for the downhole string. The tension sub is also designed to allow for the use of explosive devices, such as plugs, packers, severing tools, and perforating guns. These modifications can readily be made by those skilled in the art and are within the scope of the invention. Overall, the invention improves the process of drilling and well construction.
Problems solved by technology
Wireline is generally weaker than tubing or drill pipe, and susceptible to tensile separation tangling or snagging in a wellbore.
Moreover, deeper wellbores pose additional difficulty as the wireline can stretch under its own weight, thereby further limiting the amount of tension that can be exerted onto the wireline from the downhole tool.
Further, components of a downhole string, such as the cable head, connector subs in the string, or other elements of the string, can also be damaged if applied tension exceeds their yield strength.
Method used
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[0015]The method and system of the present disclosure will now be described more fully hereinafter with reference to the accompanying drawings in which embodiments are shown. The method and system of the present disclosure may be in many different forms and should not be construed as limited to the illustrated embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey its scope to those skilled in the art. Like numbers refer to like elements throughout. In an embodiment, usage of the term about includes + / −5% of the cited magnitude.
[0016]It is to be further understood that the scope of the present disclosure is not limited to the exact details of construction, operation, exact materials, or embodiments shown and described, as modifications and equivalents will be apparent to one skilled in the art. In the drawings and specification, there have been disclosed illustrative embodiments and, although ...
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A downhole string and method of operating where tension in the downhole string is monitored real time so that the tension in the downhole string does not exceed its yield strength. Included with the string is a tension sub for monitoring the tension that includes a sensor in the housing of the tension sub. The sensor can be a strain gauge and can be placed proximate an upper end of the downhole string so that tension in a wireline attached to the string can also be monitored. The portion of the housing having the sensor is narrowed for enhancing sensitivity of monitoring.
Description
CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to and the benefit of co-pending U.S. Provisional Application Ser. No. 61 / 859,473, filed Jul. 29, 2013, the full disclosure of which is hereby incorporated by reference herein for all purposes.BACKGROUND[0002]1. Field of Invention[0003]This invention relates in general to production of hydrocarbon from a subterranean wellbore, and in particular to a tension measurement device on a wireline.[0004]2. Description of Prior Art[0005]Some wellbore operations downhole involve deploying a downhole tool on a wireline, or other conveyance means. Typical downhole tools include perforating guns, logging tools, mechanical devices and downhole sensors. Logging tools generally measure the formation properties surrounding the wellbore, and often employ nuclear magnetic resonance devices or radioactive sources. Acoustic, radioactive, temperature, mechanical, electrical, dielectric, salintysensors are also sometimes used fo...
Claims
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Login to View More IPC IPC(8): E21B19/08
CPCE21B19/08E21B47/007
InventorSMAARDYK, JOHN EDWARDJONES, JOHN PAULWALLER, ROBERTFONTENOT, PETERBROWN, CHRISTOPHER
OwnerGE OIL & GAS LOGGING SERVICES