Rotary hose

Swivel and Rotary Hose 616. Drill-Stem Subs 619. Kelly 620. Rotary Table and Bushings 622. 

Rotary Hose Safety Chain Attachment. Swivels with gooseneck connections in 2 in. or larger shall have a suitable lug containing a 1 - -in. hole to accommodate the clevis of a chain having a breaking strength of 16,000 lb. The location of the lug is the choice of the manufacturer. 

The swivel (Figure 4-88) suspends the kelly, allows for rotation of the kelly and drill string, and provides a connection for the rotary hose to allow mud circulation. 

Although the rotary hose is not a rotating element, it is mentioned here due to its connection with the swivel. It is used as the flexible connector between the top of the standpipe and the swivel, and allows for vertical travel of the swivel and block (Figure 4-89). It is usually 45 ft or longer. Rotary hose specifications are provided in API Specification 7 [13]. Each hose assembly is... 

Rotary hose external connections (i.e., the connection to the swivel gooseneck) are threaded with line-pipe thread as specified in API Specification 5B [14]. 

Examples A, O-rings for rotary and static applications (43) B, extruded items such as hose, tube, and solid splicable stock C, fuel hose for low temperature service (—57°C) and coated fabric for collapsible fuel storage tanks (40, 45) D, biomedical applications such as soft denture liners (48) and blood compatible parts E, lip seals (42) F, shock absorption and vibration damping mounts, (Photograph courtesy of the Firestone Tire... 

In building B-46, three separate operations are performed consolidation, demachlnlng, and cone swagglng. A rotary press Is used to consolidate A-5 explosive Into a grenade. To pick up the dust from this pressing operation, flexible rubber hoses (2.0 in.) are used. These lines are then connected to a stainless steel line that runs Into a wet collector. 

The sample stream enters through a PVC pipe [1.2-cm outside diameter (OD)] extending 0.5 m in front of the fish and passes through the pump and up the hose, thus, contacting only PVC, Tygon, and Delrin. The hose and rotary joint at the winch are nylon. 

Water pressure at the pump is approximately 830 kPa (120 psi). After passing through the 210 m of hose-cable, the rotary joint, and 30 m of 1.0-cm ID tubing on deck, the water arrives at a manifold in the laboratory (3 m above the waterline) with pressure of approximately 210 kPa (30 psi). Flow time from pump to manifold is 3 min. From the manifold, water is distributed to the various analytical instruments. 

The arrangement of the spots on the film surface depends on the spraying regime and bush 12 travel pattern. Reciprocation of the bush creates vertical stripes, its rotary motion results in spiral curls (combining radial shifts of the Cl jets with the vertical travel of the film). Pulse spraying at variable velocity of bush 12 produces intricate drawings on the hose surface. 

Figure 7.12 shows a typical combination negative-positive pressure vacuum system. Vacuum from the pump draws material into either a cyclone separator or filter receiver. The pellets are passed through a rotary airlock and enter the blower discharge airstream, which is at positive pressure. The air/material mixture is transferred to the silos via stainless-steel flex-hose and fill lines. Combination units tend to be high-capacity systems used primarily with multiple silo systems. One advantage is that they require no equipment whatsoever on top of the silo, only a simple fill line. All maintenance is performed at ground level. 

Hose couplings shall be of the type that cannot be unlocked or disconnected by means of a straight pull without rotary motion. 

Hickman Still-Rotary Evaporation Apparatus. A simple microscale rotary evaporator for use in the instructional laboratory consists of a 10-mL round-bottom flask connected to a capped Hickman stOl (side-arm type), which in turn is attached to a water aspirator (with trap) The procedure involves transferring the solution to be concentrated to the preweighed 10-mL flask. The flask is then attached to a Hickman stiH with its top joint sealed with a rubber septum and threaded compression cap. The apparatus is connected by the stiU side arm to the trap-vacuum source with a vacuum hose. lAdth the aspirator on, one shakes the apparatus while warming the flask in the palm of the hand. In this manner, bumping is avoided and evaporation is expedited. The stiU acts as a splash guard. Heat transfer is very effective, and once the flask reaches ambient temperature, the vacuum is released by venting through the trap stopcock. 

Struck by Falling/moving pipe tongs and/or spinning chain, Kelly, rotary table, etc. high-pressure hose connection failure causing employees to be struck by whipping hose tools or debris dropped from elevated location in rig vehicles... 

To conclude, Figure 5.8 depicts the operation of a peristaltic pump. The selection of a pump is sometimes constrained by non-mechanical considerations. In a peristaltic pump, the fluid flows in a flexible pipe which is independent from the pump mechanism. The hose is inserted into a circular cavity against whose surface it is forced by cylindrical rollers attached to a rotating hub. These rollers squeeze the hose at regular intervals. The fluid contained in the hose is driven by the rotation of the rotary hub. One benefit of such an apparatus is that the fluid is not in contact with the pumping mechanism. After use, the hose can be replaced if necessary. Peristaltic pumps are very simple to use. The use of small peristaltic pumps is very common in chemistry and biology, whenever product containment is required for safety reasons, or when the products can prove harmful for the mechanical parts (abrasion, corrosion, etc.). Less widely known is the existence of peristaltic pumps of significant size, whose flow rates can reach several tens of mVh. 

Hose couplings shall be of the type that cannot be unlocked or disconnected by means of a straight pull without rotary motion. Boxes used for the storage of gas hose shall be ventilated. Hoses, cables, and other equipment shall be kept clear of passageways, ladders, and stairs. 

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