Abstract: A delivery system includes a first instrument having an outer sleeve defining a passageway. The first instrument includes an inner sleeve having a first end disposed in the passageway and a second end including a first mating element. The inner sleeve defines a channel. A second instrument includes a hollow shaft disposed in the channel and a handle coupled to the shaft. The handle includes a body and a second mating element extending from the body. The second mating element is configured to engage the first mating element to secure the second instrument to the first instrument. Methods are disclosed.

Abstract: A delivery system includes a first instrument having an outer sleeve defining a passageway. The first instrument includes an inner sleeve having a first end disposed in the passageway and a second end including a first mating element. The inner sleeve defines a channel. A second instrument includes a hollow shaft disposed in the channel and a handle coupled to the shaft. The handle includes a body and a second mating element extending from the body. The second mating element is configured to engage the first mating element to secure the second instrument to the first instrument. Methods are disclosed.

Abstract: A delivery system includes a first instrument having an outer sleeve defining a passageway. The first instrument includes an inner sleeve having a first end disposed in the passageway and a second end including a first mating element. The inner sleeve defines a channel. A second instrument includes a hollow shaft disposed in the channel and a handle coupled to the shaft. The handle includes a body and a second mating element extending from the body. The second mating element is configured to engage the first mating element to secure the second instrument to the first instrument. Methods are disclosed.

Abstract: A delivery system includes a first instrument having an outer sleeve defining a passageway. The first instrument includes an inner sleeve having a first end disposed in the passageway and a second end including a first mating element. The inner sleeve defines a channel. A second instrument includes a hollow shaft disposed in the channel and a handle coupled to the shaft. The handle includes a body and a second mating element extending from the body. The second mating element is configured to engage the first mating element to secure the second instrument to the first instrument. Methods are disclosed.

Abstract: Natural gas is reinjected into an earth formation for storage and/or stimulating the recovery of hydrocarbon liquids by mixing the gas with water at a pressure sufficient to maintain bubble flow of gas dispersed in a water flowstream in a range of volumetric gas fraction up to about twenty percent of total flow. A water and gas distribution system includes static flow mixers for maintaining uniform distribution of gas bubbles in the water flow stream through the distribution conduits. The mixers may comprise multi-stage bladed mixing elements of the same or opposite pitch and extending across the intersection of branch conduits with the main conduit of the distribution system. The water and gas may be mixed in an injection well having a tubing string extending within the well and having a distal end below the point of injection into an earth formation so that a uniform gas and water mixture enters the formation through the well perforations.