Abstract: There is provided a method of analysis of mass spectrometry data comprising obtaining raw experimental mass spectrometry data; performing a first deconvolution of the raw experimental mass spectrometry data using a deconvolution algorithm, a wide first input parameter set, and a wide first output parameter set to obtain a deconvolved output; obtaining discrete peak data from the deconvolved output; simulating raw data for a first peak of the discrete peak data to obtain reference simulated raw discrete data; simulating raw data for a second peak of the discrete peak data to obtain suspect simulated raw discrete data; and determining whether the second peak is likely an artefact or indicative of a mass by comparing the suspect simulated raw discrete data with the reference simulated raw discrete data.

Abstract: A lockable motor assembly for use in a well bore comprises a PDM motor having a rotor and a stator. A locking member has a splined projection which is received within a splined recess of the rotor and external splines which mate with splines provided on a sub connected to the stator. The components are held in this configuration by a shear ring until the fluid pressure within a chamber defined between the locking member and the sub is sufficient to cause the shear ring to shear. The locking member may then move out of the engagement with the rotor to free the motor for operation. The locking member is held in this position by a ratchet mechanism.