Drilling Rods TRIZ Cases

An oil-based liquid adsorbs on iron sulfide in carbon steel tubing to form a hydrophobic barrier that limits sour-gas corrosion and scale.

A radial seal pipe joint uses thread geometry, shot blasting, and plating to limit box-side stress concentration under repeated loads.

Low-temperature DC arc welding reapplies hardbanding on drill pipe tool joints while preserving the internal polymer coating and keeping HAZ hardness below 40 Rc.

Discrete gear notches and a spring-biased lock arm prevent accidental power tong shifting caused by vibration or mishandling.

A swaged shear pin expands under axial load to lock into the tubular and retain separated parts, preventing debris-related downhole malfunction.

A splined middle element separates torque transfer from threaded axial loading, reducing thread stripping while preserving tool volume.

An elliptical thread root with radiused transitions cuts stress concentration and improves sealing, fatigue life, and torque capacity in well tubulars.

Triple sealing and modified buttress threads improve conductor casing connector strength, sealing reliability, and torque protection.

Friction-locking fins or spokes secure a tubular thread protector quickly, cutting attachment and removal time while protecting pin end threads.

Angled rotary shoulders shift axial load off tapered threads to limit box swell, pin collapse, and buckling while improving hydraulic efficiency.

A calculated minimum thread length prevents shear fracture in oil well pipe joints while cutting machining and installation time.

Constant but unequal pin and box thread tapers ease seal-side interference, reducing stress concentrations while improving metal-to-metal sealing.

A removable trough under the rig catwalk captures fluid draining from removed pipes and routes it to a basin to limit ground contamination.

Negative-play conical threads thicken the joint wall during assembly, strengthening thin-walled pile pipes while reducing material use.

Forced annulus circulation through distributing rings displaces CO2 and H2S, protecting flexible pipe armouring even during seawater flooding.

A 3-start roto-percussion drill pipe thread with beveled entries, centering profiles, and nitrided couplings reduces seizure and extends service life.

By defining the minimum effective thread length, this oil well pipe joint maintains shear strength while cutting processing and construction time.

Movable-door fittings let cleaning cables and cameras enter drilling mud flow lines while suction removes debris and blocks tool escape.

Sliding coupling members and torque profiles create a fast hands-free top drive connection for high axial load and bi-directional torque transfer.

Interlocking shaft, sleeve, and housing splines raise downhole motor torque transfer while keeping threaded installation and improving drilling rate.

A longer seal-point distance and higher box-to-pin wall ratio help threaded steel pipe joints maintain contact pressure under thermal and pressure loads.

Adjustment and pivot joints let a direct-coupled fracturing manifold handle uneven tree spacing and elevation while cutting footprint and leak points.

Hydraulic clamp members and a lock pin sequence secure the bearing assembly to the main body while preserving high-pressure integrity.

An elastomeric internal seal flexes under pressure to block fluid ingress, preserve conductor insulation, and relieve thread lubricant during pipe assembly.

An optimized 3%-7% wedge ratio helps steel pipe threads balance torque, tensile load capacity, and seal contact pressure.

A tuned wedge ratio and flank angles raise thread contact pressure while preventing crest breakage under high tensile loads.

A full-root radius thread and thicker internal shoulder reduce stress concentration and cracking in hammer union wing nuts.

A low-surface-energy inner coating cuts friction and pressure loss in coiled tubing while improving flow and corrosion resistance.

A pre-installed toothed key and tapered fastener block tubular rotation without axial loading, cutting rig-side alignment time and fatigue.

An internal annular recess in the pin end adds local flexibility to reduce wear and protect sealing in small-diameter wedge threaded casing connections.

Plastic deformation of an annular seal bulge creates a metal-to-metal seal that resists leakage in fracturing pipe joints under high pressure and load.

Laser welding with upstream and downstream induction heating joins well tubulars without threads, reducing wellbore encumbrance and weld defects.

A shoulder-backed metal seal and elastomeric ring eliminate turbulence, leaks, and corrosion in API crude-oil pipe joints.

Multi-start drill string threads increase lead angle to cut uncoupling torque, preventing jamming and enabling safer rod disconnection.

Strategically placed titanium or nickel alloy sections shift riser dynamics to cut subsea current-induced vibration and stress.

A gas spring and sliding body-housing mechanism replace subsea hydraulics, enabling quick flange connection and release for seabed lifting.

Offset inner and outer threads with a mated intermediate shoulder improve compressive load resistance while preserving fluid flow and borehole fit.

Angled shoulders, lead-in chamfers, and tapered load flanks help pipe threads balance high torque with strong tensile and compression efficiency.

Pivoting blocking members secure link eyelets in an 8-shape connection, reducing rig link inventory and storage space.

An inner and outer thrust ring coupling transfers high axial, torsional, and bending loads without increasing tubular string outer diameter.

A tapered gap in the bend stiffener spreads pipe contact pressure, maintains bend radius, and extends flexible pipe fatigue life.

Pressurized fluid expands an elastic gripper to hold different drilling tool shapes securely while avoiding surface damage.

A molded sleeve with reduced and enlarged diameter regions keeps sucker rod threads secure, then releases by hand to cut removal time and waste.

Torque-turn shape and phase analysis compares threaded tubular coupling curves with reference data to automate reliable quality assessment.

Partial thread engagement with fins or bowed fingers speeds tubular thread protector installation and removal while maintaining secure pin-end protection.

Optimized lip thickness, radial clearance, and thread flank geometry keep tubular seals stable under pressure, bending, and repeated make-up.

Compressible fluid chambers and a pressurization valve let a subsea damper handle low-frequency vibration with low hysteresis across depths.

A battery-powered propulsion wheel and roller sections help pull fibre optic lines deeper through curved and horizontal wells with less friction.

A pre-installed keyed tubular joint uses tapered actuation and toothed engagement to block rotation while avoiding hammering, misalignment, and axial fatigue.

Using krypton and microporous aerogel in a pipe-in-pipe annulus delivers vacuum-like thermal insulation without vacuum maintenance or corrosion risk.