Abstract: A mechanism to reduce load of a hydraulic cylinder having a body, a stem movable within the body, and a piston rod connected to the stem. The mechanism includes a mechanism body attached to the body and defining a recess, and a retainer attached to the mechanism adjacent the opening of the recess so that the retainer substantially fills the opening of the recess, and having an aperture that receives an end of the piston rod. The mechanism further includes a cap attached to the piston rod of the hydraulic cylinder within the recess, the cap having a diameter greater than the diameter of the aperture in the retainer, and a spring connected to the cap at a first end and to the retainer at a second end so that as the piston rod moves relative to the failsafe mechanism body, to reduce load transfer between the piston rod and the cylinder body.

Abstract: A mechanism to reduce load of a hydraulic cylinder having a body, a stem movable within the body, and a piston rod connected to the stem. The mechanism includes a mechanism body attached to the body and defining a recess, and a retainer attached to the mechanism adjacent the opening of the recess so that the retainer substantially fills the opening of the recess, and having an aperture that receives an end of the piston rod. The mechanism further includes a cap attached to the piston rod of the hydraulic cylinder within the recess, the cap having a diameter greater than the diameter of the aperture in the retainer, and a spring connected to the cap at a first end and to the retainer at a second end so that as the piston rod moves relative to the failsafe mechanism body, to reduce load transfer between the piston rod and the cylinder body.

Abstract: A variable ram packer has an elastomeric body having a central semi-cylindrical recess and wings extending from opposite lateral sides of the recess. Inserts are positioned around the recess, each having an upper plate, a lower plate and a web joining the plates. Inserts at the junction with the wings have barrier plates between and parallel with the upper and lower plates. Upper and lower wing plates are located on upper and lower surfaces of the wings. An adhesive layer on an outer portion of each of the wing plates bonds the wing plates to the elastomer of the body. Each wing plate has an inner portion in abutment with the elastomer and free of the adhesive layer.

Abstract: A variable ram packer has an elastomeric body having a central semi-cylindrical recess and wings extending from opposite lateral sides of the recess. Inserts are positioned around the recess, each having an upper plate, a lower plate and a web joining the plates. Inserts at the junction with the wings have barrier plates between and parallel with the upper and lower plates. Upper and lower wing plates are located on upper and lower surfaces of the wings. An adhesive layer on an outer portion of each of the wing plates bonds the wing plates to the elastomer of the body. Each wing plate has an inner portion in abutment with the elastomer and free of the adhesive layer.

Abstract: Apparatus and for providing controlled addition of a first aqueous solution having a first concentration of an aqueous chemical species at a first flow rate to a second aqueous solution having a second flow rate to provide a diluted first solution of a desired selected concentration of the chemical species, the apparatus having a second solution sensor to obtain data on the second solution selected from the second flow rate and the temperature of the second solution; a first solution sensor to obtain data on the temperature of the first solution; a pump to effect addition of the first solution to the second solution to provide the diluted first solution; and a CPU (i) to receive the data selected from the second flow rate and temperature data from the second solution sensor; (ii) to receive the temperature sensing data on the first solution from the first solution sensor; (iii) to effect algorithmic treatment of the data from the first and second sensor, to provide pump control data; and (iv) to control the p