D.L. Martin Co.
Borehole jacks are placed in a hole drilled into the ground to a depth roughly equal to the elevator car travel. Mounting feet welded to the cylinder sides are used to mount the jack to the pit floor. The mounting feet and oil inlet are designed not to interfere with each other, allowing freedom to vary their location to meet customer needs for various pit designs and depths. The jacks can be manufactured as a single piece or in multiple sections. A multi-piece jack has cylinder and plunger sections that couple together using threaded couplings and an o-ring seal. This joint design eliminates the time and expense of field welding the sections together. Below are sectional views of a typical two-section jack with an optional sealed PVC casing.
Holeless and roped jacks can be manufactured as a single piece or in multiple sections. A multi-piece jack has cylinder and plunger sections that couple together using threaded couplings and an o-ring seal. This joint design eliminates the time and expense of field welding the sections together. Below on the right is a sectional view of a two section holeless or roped jack. On the left is a similar section of a bottom inlet roped jack. The internal arrangement is the same except the centering pin has been removed and replaced with four guides spaced around the sides of the barrel as shown.
D.L. Martin Co., Mercersburg, Pennsylvania (N64498-18-D-4013) was awarded a $14,500,000 ceiling firm-fixed-price, indefinite-delivery/indefinite-quantity, multiple award service contract to support the assembly and test services for submarine mast, antenna, periscope and communication systems hull, mechanical and electrical assemblies. Work is expected to be performed at the contractor facilities in Mercersburg, PA. The work under this multiple-award contract will contain a five-year ordering period and is expected to be completed by September 2023. Fiscal 2018 operations and maintenance (Navy) funding in the total amount of $25,000 will be obligated at time of award. This contract was competitively procured via by the Naval Surface Warfare Center, Philadelphia Division, Philadelphia, Pennsylvania, and is the contracting activity.
The work under these contracts will fall under two categories (engineering support services and program management support services), which are further divided into 23 functional areas. The government estimates approximately $5,000,000,000 of services will be procured, per year, via orders issued under the SeaPort-NxG multiple award contracts. This award falls directly in line with the recently received IDIQ Services contract from NSWCPD for support of the submarine mast, antenna, periscope, and communication systems; Hull, Mechanical and Electrical assemblies (HM & E) received this past September.