Abstract: An unbalanced sub-assembly includes a turbine and a shaft coupled to the turbine at a first end of the shaft. The unbalanced sub-assembly is capable of rotating and imparting a vibration to the casing in response to a fluid being passed through the casing. A rupture disc is positioned on one end of the unbalanced sub assembly. The rupture disc is configured to rupture above a specified differential pressure threshold caused by fluid flowing through the vibration assembly. The rupture disc is capable of allowing the fluid to bypass the unbalanced sub assembly when the rupture disc is in a ruptured state. The rupture disc directs fluid through the unbalanced sub assembly when the rupture disc is in an un-ruptured state.

Abstract: An unbalanced sub-assembly is located within the wellbore casing shoe. The unbalanced sub-assembly includes a turbine and a shaft coupled to the turbine at a first end of the shaft. The unbalanced sub-assembly is configured to rotate and to impart a vibration to the casing in response to a fluid being passed through the casing. A rupture disc is positioned on one end of the unbalanced sub assembly. The rupture disc is configured to rupture above a specified differential pressure threshold caused by fluid flowing through the vibration assembly. The rupture disc is configured to allow the fluid to bypass the unbalanced sub assembly when the rupture disc is in a ruptured state. The rupture disc is configured to direct fluid through the unbalanced sub assembly when the rupture disc is in an un-ruptured state.

Abstract: An unbalanced sub-assembly includes a turbine and a shaft coupled to the turbine at a first end of the shaft. The unbalanced sub-assembly is capable of rotating and imparting a vibration to the casing in response to a fluid being passed through the casing. A rupture disc is positioned on one end of the unbalanced sub assembly. The rupture disc is configured to rupture above a specified differential pressure threshold caused by fluid flowing through the vibration assembly. The rupture disc is capable of allowing the fluid to bypass the unbalanced sub assembly when the rupture disc is in a ruptured state. The rupture disc directs fluid through the unbalanced sub assembly when the rupture disc is in an un-ruptured state.

Abstract: An unbalanced sub-assembly includes a turbine and a shaft coupled to the turbine at a first end of the shaft. The unbalanced sub-assembly is capable of rotating and imparting a vibration to the casing in response to a fluid being passed through the casing. A rupture disc is positioned on one end of the unbalanced sub assembly. The rupture disc is configured to rupture above a specified differential pressure threshold caused by fluid flowing through the vibration assembly. The rupture disc is capable of allowing the fluid to bypass the unbalanced sub assembly when the rupture disc is in a ruptured state. The rupture disc directs fluid through the unbalanced sub assembly when the rupture disc is in an un-ruptured state.

Abstract: A stage cementing tool includes a top sub-assembly; a bottom sub-assembly; a housing that connects the top and bottom sub-assembly and includes a bore therethrough from the top sub-assembly to the bottom sub-assembly, the housing including a plurality of ports radially arranged in the housing, each port including a fluid path between an interior radial surface of the housing and an outer radial surface of the housing; at least one sleeve that rides on a portion of the housing; and a controller mounted in the housing and configured to control the sleeve to adjust, based on receipt of a command to the controller from the terranean surface, between a first position such that the sleeve mandrel decouples fluid communication from the bore to an exterior of the housing through the fluid paths and a second position such that the sleeve mandrel fluidly couples the bore with the exterior of the housing through the fluid paths.

Abstract: An unbalanced sub-assembly includes a turbine and a shaft coupled to the turbine at a first end of the shaft. The unbalanced sub-assembly is capable of rotating and imparting a vibration to the casing in response to a fluid being passed through the casing. A rupture disc is positioned on one end of the unbalanced sub assembly. The rupture disc is configured to rupture above a specified differential pressure threshold caused by fluid flowing through the vibration assembly. The rupture disc is capable of allowing the fluid to bypass the unbalanced sub assembly when the rupture disc is in a ruptured state. The rupture disc directs fluid through the unbalanced sub assembly when the rupture disc is in an un-ruptured state.

Abstract: An unbalanced sub-assembly is located within the wellbore casing shoe. The unbalanced sub-assembly includes a turbine and a shaft coupled to the turbine at a first end of the shaft. The unbalanced sub-assembly is configured to rotate and to impart a vibration to the casing in response to a fluid being passed through the casing. A rupture disc is positioned on one end of the unbalanced sub assembly. The rupture disc is configured to rupture above a specified differential pressure threshold caused by fluid flowing through the vibration assembly. The rupture disc is configured to allow the fluid to bypass the unbalanced sub assembly when the rupture disc is in a ruptured state. The rupture disc is configured to direct fluid through the unbalanced sub assembly when the rupture disc is in an un-ruptured state.

Abstract: A stage cementing tool includes a top sub-assembly; a bottom sub-assembly; a housing that connects the top and bottom sub-assembly and includes a bore therethrough from the top sub-assembly to the bottom sub-assembly, the housing including a plurality of ports radially arranged in the housing, each port including a fluid path between an interior radial surface of the housing and an outer radial surface of the housing; at least one sleeve that rides on a portion of the housing; and a controller mounted in the housing and configured to control the sleeve to adjust, based on receipt of a command to the controller from the terranean surface, between a first position such that the sleeve mandrel decouples fluid communication from the bore to an exterior of the housing through the fluid paths and a second position such that the sleeve mandrel fluidly couples the bore with the exterior of the housing through the fluid paths.

Abstract: A clay control additive for cement composition of the general formula: ##STR1## wherein the R groups are selected from a C.sub.1 to C.sub.4 substituted alkyl.