초록 ▼

Measuring and transmitting apparatus is the subject matter of the preferred embodiment which comprises an elongate tubular member functioning as a drill collar and adapted to be placed in a drill string. The apparatus utilizes a mud driven motor, while the mud flows therethrough functioning as a dri

Measuring and transmitting apparatus is the subject matter of the preferred embodiment which comprises an elongate tubular member functioning as a drill collar and adapted to be placed in a drill string. The apparatus utilizes a mud driven motor, while the mud flows therethrough functioning as a drill collar and out the bottom. The motor creates electric power which is used to operate selected transducers. The transducers form measurements which are encoded. The encoding portion of the equipment utilizes an oil reservoir, a mud driven pump, a valve which dumps the oil back to the reservoir if there is no signal and which otherwise delivers it to a two-position, four-way spool valve which drives a modulated signal generator. The signal generator modulates the back pressure in the mud flow by restricting the mud flow, thereby forming a signal which is sensed in the mud flow path.

대표청구항 ▼

Apparatus for use in a drill string to form a signal of downhole drilling information, comprising: (a) an elongate outer body of tubular construction having an outer wall and which outer body terminates in upper and lower connective means for connection in a drill string; (b) an inner body received

Apparatus for use in a drill string to form a signal of downhole drilling information, comprising: (a) an elongate outer body of tubular construction having an outer wall and which outer body terminates in upper and lower connective means for connection in a drill string; (b) an inner body received inside of and enclosed within said outer body; (c) means for positioning said inner body to define a mud flow annular space around said inner body on the interior of said outer body; (d) motor means for intercepting the flow of mud through said annular space which motor means converts the mud flow into rotational torque; (e) a shaft connected to said motor to be rotated thereby; (f) an hydraulic pump connected to said shaft for pumping hydraulic fluid at an elevated pressure; (g) a controllable valve means; (h) a movable piston received in a cylinder; (i) a constricted passage in said annular space located such that the mud flow through the annular space is directed through the constricted passage, and a plug movably actuated by said piston to vary the constiction on the mud flow with movement of said plug; and (j) an hydraulic circuit connected to said hydraulic pump utilizing hydraulic fluid flowing in hydraulic conduits through said controllable valve to said piston and cylinder for moving the piston to an altered position to modulate the flow of mud and thereby form an output signal dependent on the manipulation of said controllable valve means.