摘要:
An apparatus for use in launching cement plugs in a well cementing operation comprises a cylinder, a piston slideably received in the bore of the cylinder and an actuator extending from the piston through the cylinder. The actuator is operable by the piston for launching plugs from the apparatus into the well. A resilient damper cartridge is slideably mounted on the actuator in the cylinder so as to be contactable by the piston. A series of frangible pins is located in the cylinder wall so as to provide temporary limits to the movement of the cartridge in the cylinder as the piston slides along the cylinder.
摘要:
A method and apparatus for making real-time measurements of downhole properties during cement plug placement. A wired placement conduit (14) is lowered downhole releasing a sensor package (20). The sensor package is capable of measuring downhole properties in real-time in the period while the cement plug sets.
摘要:
An apparatus for use in launching cement plugs in a well cementing operation, comprising: —a cylinder (104) having ports (106) defined in a portion of the wall thereof; —a piston (108) slideably received in the bore of the cylinder below the ports; and —an actuator (110) extending from the piston through the cylinder and operable by the piston for launching a plug from the apparatus into the well; wherein the apparatus further comprises an elongate sleeve valve member located in the cylinder above the piston, the sleeve valve member (112) comprising at least one ball seat (114a-114c) for receiving a ball to block the interior of the cylinder, sleeve ports formed in the sleeve above the ball seat, and a spacer (118) extending between the ball seat and the piston.
摘要:
A bottom cementing plug is equipped to activate autofill float equipment. The bottom cementing plug contains an activation device that is released when the plug lands on the autofill equipment, then enters the autofill equipment, triggering the activation of check valves. The activation device may also contain a chemical substance that is released into the well when the activation device exits the bottom cementing plug.
摘要:
Equipment for servicing subterranean wells are disclosed. Particularly, a cementing plug that is equipped to activate autofill float equipment, and a method by which the plug is employed to activate autofill equipment. The bottom cementing plug contains an activation device that is released when the plug lands on the autofill equipment, then enters the autofill equipment, triggering the activation of check valves. The activation device may also contain a chemical substance that is released into the well when the activation device exits the bottom cementing plug.
摘要:
Apparatus and methods for remotely launching cementing plugs during the primary cementation of a subterranean well. The apparatus includes a flexible sleeve that absorbs force exerted by activation devices as they arrive at a cementing head, thereby preventing premature release of a cementing plug.
摘要:
The invention discloses a system for mixing a liquid material and a solid material, said system comprising: i) a base unit (22′), for the liquid material and the solid material; ii) a liquid material supply (21); iii) a solid material supply (200); iv) a liquid/solid mixing output (23); and v) an injection unit (20) connected to the liquid material supply and to the solid material supply, said injection unit injecting said liquid material and said solid material in the base unit; vi) a separation and extraction unit (24) simultaneously separating surplus of gas coming from the mixing of the liquid material and the solid material and extracting from the base unit said surplus of gas. Further disclosed is a method for mixing a liquid material and a solid material, said method comprising the steps of: i) mixing the liquid material and the solid material to form a liquid/solid slurry; ii) separating and extracting simultaneously from said liquid/solid slurry surplus of gas coming from the mixing of the liquid and the solid material; and iii) extracting from said liquid/solid slurry a liquid/solid material substantially without gas.
摘要:
The invention provides a method of isolating an open hole fitted with a slotted liner, the method consisting in pumping a cement or a resin to the level of the slotted liner by means of injection apparatus provided with lips for scrapping the slotted liner downstream from the injection point so that the cement or resin fills the entire borehole upstream from the injection apparatus and also fills the space behind the slotted liner while the apparatus is being raised towards the surface. The invention also provides injection apparatus particularly adapted to implement the method, which apparatus can advantageously be displaced by means of coiled tubing.