Abstract: The present disclosure provides an attachment for an elastography and/or imaging device. The device has a transmission portion for transmission of electromagnetic radiation or acoustic waves towards a sample material. The attachment comprises a securing portion for securing the attachment to the device. The attachment further has a sensing portion coupled to the securing portion. The sensing portion is adapted to receive a deformable sensing layer that is at least partially transmissive for the electromagnetic radiation or the acoustic waves. The attachment is arranged such that, when attached to the device and the sensing layer is received at the sensing portion, the electromagnetic radiation is in use transmitted through the sensing layer or the acoustic waves are transmitted through the sensing layer towards the sample material, and when a load is applied to the sample material through the sensing layer, the sensing layer deforms.

Abstract: A downhole fluid comprises a base fluid, for example a hydrocarbon base fluid, and a pyromellitamide gelling agent. The pyromellitamide gelling agent may have the general formula of: with R1, R2, R3, R4, R5, R6, R7, and R8 each being a hydrogen or an organic group. R1, R2, R3 and R4 may each be hexyl groups or may each be octyl groups. A composition for gelling a downhole fluid, the composition comprising a pyromellitamide gelling agent and a wetting agent.

Abstract: A downhole fluid comprises a base fluid, for example a hydrocarbon base fluid, and a gelling agent. The gelling agent has an aromatic core of one or more aromatic rings, the gelling agent having two or more amide branches distributed about the aromatic core, each of the two or more amide branches having one or more organic groups. An example gelling agent is a pyromellitamide gelling agent. The pyromellitamide gelling agent may have the general formula of: with R1, R2, R3, R4, R5, R6, R7, and R8 each being a hydrogen or an organic group. Methods of use and composition are discussed.

Abstract: A downhole fluid comprises a base fluid, for example a hydrocarbon base fluid, a gelling agent, and a gel enhancer. The gelling agent has an aromatic core of one or more aromatic rings, the gelling agent having two or more amide branches distributed about the aromatic core, each of the two or more amide branches having one or more organic groups. An example gelling agent is a pyromellitamide gelling agent. A method of making a downhole fluid, the method comprising: combining a base fluid, a gelling agent, and a gel enhancer. A downhole fluid comprising a base fluid, a gelling agent, a breaker, and a gel enhancer. Downhole fluids with such gels and a breaker are also disclosed.

Abstract: A downhole fluid comprises a base fluid, for example a hydrocarbon base fluid, and a pyromellitamide gelling agent. The pyromellitamide gelling agent may have the general formula of: with R1, R2, R3, R4, R5, R6, R7, and R8 each being a hydrogen or an organic group. R1, R2, R3 and R4 may each be hexyl groups or may each be octyl groups. A composition for gelling a downhole fluid, the composition comprising a pyromellitamide gelling agent and a wetting agent.

Abstract: A spool with a hub to carry a spooled hose or cable and first and second couplings to attach the spool to a cradle, wherein the first coupling is arranged to be fixed against rotation as the hub rotates and the second coupling is arranged to rotate in unison with the hub and wherein a drive unit is fitted between the first coupling and the hub to drive the hub around the first coupling and thereby wind the hose or cable around the hub.

Abstract: A downhole fluid comprises a base fluid, for example a hydrocarbon base fluid, and a gelling agent. The gelling agent has an aromatic core of one or more aromatic rings, the gelling agent having two or more amide branches distributed about the aromatic core, each of the two or more amide branches having one or more organic groups. An example gelling agent is a pyromellitamide gelling agent. The pyromellitamide gelling agent may have the general formula of: with R1, R2, R3, R4, R5, R6, R7, and R8 each being a hydrogen or an organic group. Methods of use and composition are discussed.

Abstract: A downhole fluid comprises a base fluid, for example a hydrocarbon base fluid, and a pyromellitamide gelling agent. The pyromellitamide gelling agent may have the general formula of: with R1, R2, R3, R4, R5, R6, R7, and R8 each being a hydrogen or an organic group. A method comprises introducing the downhole fluid into a downhole formation. A method of making a downhole fluid, the method comprising: combining a base fluid and a pyromellitamide gelling agent. A composition for gelling a downhole fluid, the composition comprising a pyromellitamide gelling agent and a wetting agent.

Abstract: A downhole fluid comprises a base fluid, for example a hydrocarbon base fluid, and a gelling agent. The gelling agent has an aromatic core of one or more aromatic rings, the gelling agent having two or more amide branches distributed about the aromatic core, each of the two or more amide branches having one or more organic groups. An example gelling agent is a pyromellitamide gelling agent. The pyromellitamide gelling agent may have the general formula of: with R1, R2, R3, R4, R5, R6, R7, and R8 each being a hydrogen or an organic group. Methods of use and composition are discussed.

Abstract: A downhole fluid comprises a base fluid, for example a hydrocarbon base fluid, and a gelling agent. The gelling agent has an aromatic core of one or more aromatic rings, the gelling agent having two or more amide branches distributed about the aromatic core, each of the two or more amide branches having one or more organic groups. An example gelling agent is a pyromellitamide gelling agent. The pyromellitamide gelling agent may have the general formula of: with R1, R2, R3, R4, R5, R6, R7, and R8 each being a hydrogen or an organic group. Methods of use and composition are discussed.

Abstract: A downhole fluid comprises a base fluid, for example a hydrocarbon base fluid, a gelling agent, and a gel enhancer. The gelling agent has an aromatic core of one or more aromatic rings, the gelling agent having two or more amide branches distributed about the aromatic core, each of the two or more amide branches having one or more organic groups. An example gelling agent is a pyromellitamide gelling agent. A method of making a downhole fluid, the method comprising: combining a base fluid, a gelling agent, and a gel enhancer. A downhole fluid comprising a base fluid, a gelling agent, a breaker, and a gel enhancer. Downhole fluids with such gels and a breaker are also disclosed.