Abstract: Opposite ends, or terminals, of the sub are connected by a tubular arbor with threaded pins on each end. The arbor is bent in the middle. A mating threaded box on the upper terminal is tilted an amount equal to the bend angle of the arbor and mates with the bent end of the arbor. If the arbor is rotated in the box, the centerline of the other threaded end describes a cone. One line on the cone is the axis of rotation of the upper terminal. If the lower terminal is locked in that position, the sub is in the straight configuration. Locked in any other rotational position, the sub is bent an angle that is a function of the amount of arbor rotation. To make the arbor adjustable from the outside, an indicator ring is mounted on splines on the arbor. The ring can slide axially on the arbor. The lower terminal can be tightened on the lower end of the arbor to jam the indicator against the upper arbor, locking the assembly for use.

Abstract: An enabling tractor arranged for small crop cultivation, even by those with some manual handicaps, has four wheels with two powered rear wheels and caster type steering controlled by hand an foot levers that move in unison and in sympathy with the steering movement of the front wheels. The chassis has an open center for direct access of the operator to carried tilling apparatus while the tractor continues forward under steering control. Power delivery to the drive wheels is optionally controlled by a clutch arrangement that minimizes maintenance problems.

Abstract: A fluid flow control apparatus for use in a mid-string location in a pipe string being run into a well has an open fluid flow route to the annulus above the apparatus to provide more flow area for upwardly moving fluid. Flow up the upper pipe string bore is resisted to reduce fluid overflow from the top of the pipe string. Fluid flow down the pipe string bore closes the fluid channel between the lower pipe string bore and the upper annulus and blows out a pipe bore flow resisting element for free down flow of fluids in the pipe string bore.

Abstract: The by-pass valve has a selective control already available to control the movement of a piston which is part of the main stream by-pass valve which diverts fluid from the pipe string bore to ports in the outer wall for projection of the fluid stream into a well.

Abstract: The derrick is configured to place the lift axis of the crown block toward the aft end of the rig floor. Major floor loads such as draw works are moved closer to the platform. The spare line spool support is changed from rig floor to platform. The set back areas are distributed on both sides of the vee door.

Abstract: The diverter valve is carried in a housing that serves as a length of drill string. A selector valve is actuated by selective mud flow control signals from the surface and can close to build internal pressure to move a poppet to open a by-pass channel. Positive resilient seals are carried inside a protective sleeve until the principal openings are closed, then the seal is deployed to stop leakage.

Abstract: Shaped plates are provided, one above each side of a spider, to replace the bails and links used to suspend the spider and its pipe payloads. The load applied to the housing suspension hard points, whether ears or lugs, to suspend the spider is transferred to the rig floor by the plates. The plates are preferably shaped to balance about a cross pin situated in a cross bore in the plates. The plates are not inclined to tilt whether being hoisted or loaded by the spider. The spider is submerged into the rotary opening and results in reduced height of pipe string connections to be worked.

Abstract: The apparatus has a housing which is secured to the lower end of a drilling motor body and carries an arbor that is secured to the output shaft of the motor. The arbor has three segments serially connected by gimbals. The upper segment is axially fixed by the bearings of the motor and has a lower end that extends when actuated to push the center segment downward. Axial movement of the center segment actuates a cam to move it laterally. The lower segment extends from the housing as an output shaft. It is arranged to tilt relative to the housing and its upper end is moved laterally by the gimbal connected center segment. The resulting tilt of the rotating axis of the output shaft causes an attached drill head to drill a deflected well bore.

Abstract: The hood is fitted with a fan in the crown that directs air flow upward from the hood interior. The hood has a liner that provides an air distribution plenum between hood and liner. Air flows from the plenum toward hair being dried from holes in the plenum. Some of the holes are, preferably, fitted with movable jets which can be rotated to provide the out flow pattern preferred for the particular hair style being dried.

Abstract: A ball fastened to a base plate is received within the socket of a trailer hitch, with a box shaped, open ended housing slipped over the exposed end of the tongue, hitch, and plate. The plate has a pierced tang that extends through the closed end of the housing and into a tubular extension projecting from the housing. A purchase item cylindrical, keyed, tumbler operated, lock slips into the bore of the extension and projects a key operated, retractable, transversely movable, shot bolt through the pierced hole of the tang. The lock is protected within the extension, and the apparatus has no parts exposed for tampering.

Abstract: The apparatus has a housing arranged to function as a length of drill string, including a fluid tight fluid conducting bore, with means at each end for connecting to a continuing drill string. The housing has two principal portions bearingly connected for rotation and axial constraint. A spring loaded one way clutch connects the two portions such that torque can be conducted therethrough in only one rotational direction. The clutch has one, spring loaded, axially moving element to actuate the clutch unless locked by optional provisions. The axial movement, optionally, actuates a valve in the fluid conducting bore to create a pressure drop in the fluid stream when the clutch is disengaged to provide a pressure signal that can be detected at the surface to indicate that the clutch is disengaged.

Abstract: A support table with an upwardly extending tubular neck engages the lower surface of the upper connector of the string to support the string while resting on a floor-level support. The neck is small enough for an elevator to close around the neck and still engage the outer portion of the lower surface of the connector. The support table is split into separable parts for opening to install and remove it from around the string. The base of the support table is large enough to stand on the rig floor level support. Optionally, a liner is provided for an oversize elevator bore to provide an axially short, inwardly extending, lower flange. On the upper end the liner has an outwardly extending flange to engage the usual load bearing surface of the elevator. The liner is split to open with the elevator, with each portion secured to the elevator by at least one fastener.

Abstract: A pile driving adapter having at least one surface provided to abut the driven piling with the driver surface profiled to match the surface profile on the end of the piling. A tubular portion is arranged to receive the hammer blows. A transition portion provides rework material for the driver surface and a choice of a guide sleeve or a guide plug, extending downward from the transition portion, helps guide the adapter onto the piling.

Abstract: The coupler is a ball and socket arrangement with retaining, sealing and lubricating features, and torque transmitting elements to rotationally connect the ball and socket. The torque transmitting elements include cams secured to the ball and sliding, to allow flexure, in slots in the socket surface. The retainer, which limits axial separation of ball and socket, preferably, also has a convex spherical surface with an origin common to that of the ball to provide a sealing surface to retain lubricant in the ball and socket region. A spring biased seal carrier has seals to engage the retainer convex surface and the element carrying the ball to form a closure. In an alternate form, the sealing elements comprise a tubular elastomer element attached at each end to the opposite terminals of the coupler.

Abstract: An ophthalmic instrument support apparatus has a generally cylindrical base with top and bottom ends and an instrument support post that is, preferably, telescopably received in the base to extend upward an adjustable distance. A laterally extending arm is detachably secured to said post and arranged to receive an ophthalmic instrument on the extended end. The base is arranged to rest on a floor. The base has legs that are extendible from base to engage the floor for stability. An optional over-the-lap table is provided, with means to attach one end to the base, with a leg to support the distal end. The base is arranged with doors to receive a selected set of ophthalmic instruments, in the base and on the doors, for storage and protection during transport.

Abstract: The valve, has an orifice and cooperating poppet with the poppet situated to approach the orifice to an extent determined by a controlling crosshead that reciprocates axially in response to manipulation of the mud flow moving through the valve. The amount of restriction provided by the valve is varied by selected manipulation of the drilling fluid flow controls at the surface. Pressure provided to controlled machinery is regulated by a valve by-pass channel. Changes in the standpipe pressure indicates the state of the valve action achieved down hole.

Abstract: A spider, preferably a flush mounted spider, and powered lead tong are coupled by a rotationally rigid structure so that torque reaction forces apply no side load to pipe. The tong preferably tilts upward to clear larger objects approaching the spider. An optional grabber is mounted, preferably atop the lead tong, and may tilt with the lead tong. Fluid powered motors, linear or rotary, provide the tilting energy and extend and retract the grabber. The tong and related structure has quick coupler provisions for removal from the spider.

Abstract: A spider for use within the rotary table opening has all movable elements flush with or below the rig floor. The conventional wedge shaped slips are supported and aligned by a slip carrier that has a spherical outer surface that slideably mates with a spherical bowl inner surface in the spider such that the pipe, slip, and slip carrier can tilt as a unit about any horizontal axis that passes through the spherical surface center.

Abstract: A vertical pipe column assembly procedure involves the simultaneous welding and ultrasonic testing activity by using a plurality of welders progressing peripherally around a joint with the ultrasonic testing work similarly progressing peripherally around the joint between the welders. The temperature rise from welding activity is reduced by only partially completing the weld at a selected joint, then lowering the joint by the usual process of lowering or driving it downward one section length and completing the weld deposit at a lower work station. At the lower work station, ultrasonic testing again proceeds simultaneously between the peripherally progressing welders. An optional step used to improve joint strength, usable at selected joints needing the most strength, involves the application of an axial pull on the section above the finish welding activity. This axial pull places an axial stress in the partially completed weld.

Abstract: A closable and sealable environmental tank is supported and protected by a frame and has at least four openings, each opening subject to closure by means of screw thread secured elements. One port is a manway, with a removable closure. A second port is arranged to receive a top service adapter assembly having a connector nipple, a valve, and a standpipe or a flow port adapter for bottom discharge service. The third port is adapted to receive top discharge pressurization and pressure control assembly, or a safety blow down adapter for bottom discharge service. The fourth port is on the bottom of the tank and is adapted to receive a drain port adapter assembly, for bottom discharge service comprising at least a delivery tube, a control valve, and a connector nipple, or to receive a blind flange closure for top discharge service.