17th December 2014
Improvements have been made to the Hard Driver®, Sling Shot®, Flow Release Overshots, Double Flapper Check Valves and the Grapple Connectors to name but a few. The intention of this article is to highlight the improvements which have been made to some of the more commonly used items, namely the Motorhead Assembly (MHA), the Hydraulic Disconnect and the Heavy Duty Disconnect.
In Q2 2014 LiMAR® launched the 10,000 psi MHA, an enhanced redesign of the original 5,000 psi rated tool. Through customer demand the design and development of a 15,000 psi rated tool followed suit and was launched in Q3. Both tools feature single piece check valves which not only improve the working pressure potential but allowed a larger through bore. The 10,000 psi rated tool was released with no reduction in the MHA internal diameter or drop ball size, however, to achieve a 15,000 psi working pressure tool some modifications were necessary. To ensure that the tool remained H2S compatible alterations were made to the wall thickness which resulted in a slightly reduced internal diameter.
With notable improvements in tensile strength and resistance to sideward loading made to the MHA, LiMAR® Engineers then applied the same concepts to the Hydraulic Disconnect. With all designs complete, calculations performed and the results confirmed using Finite Element Analysis software, the outcome was an H2S compatible tool with a higher tensile safe working limit than the current revision of the non H2S compatible Heavy Duty Disconnect. It was clear that the next step in the product evolution was to improve the tensile rating of the Heavy Duty Disconnect (HDD).
The capabilities of the existing Heavy Duty Disconnect would not allow the drop ball to be returned to surface with the upper half of the BHA. With a new version of the tool to be designed the brief was clear.
Following months of planning and testing the new Heavy Duty Disconnect has been developed with improved tensile strength, a ball seat retainer which allows the drop ball to be returned to surface and a shock absorbing shear piston which further reduces the likelihood of premature disconnect under abnormal jarring loads or extreme vibration. New revisions of all tools are now available in 1-11/16”, 2-1/8”, 2-7/8” and 3-1/8” sizes as standard, other sizes are available on request. Please download the product sheets: Heavy Duty Disconnect 10,000 MHA 15,000 MHA or contact email@example.com should you wish to receive further information on any of these products.
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