A compensating rig elevator is provided to eliminate set-down weight from threaded connectors during make-up of a pipe stand and thereby provide an ability to reduce the risk of thread galling and cross-threading. The elevator may comprise one or more hoist assemblies with bail arms that deflect as the compensating rig elevator is suspended by the bail arms and a tubular is placed in the compensating rig elevator. The bail arms actuate a locking mechanism to secure the compensating rig elevator in a closed position around the tubular. The compensating rig elevator can also have compensating rams and a slip system to positively engage the tubular and bear the weight of multiple tubulars.

A compensating rig elevator is provided to eliminate set-down weight from threaded connectors during make-up of a pipe stand and thereby provide an ability to reduce the risk of thread galling and cross-threading. The elevator may comprise one or more hoist assemblies with bail arms that deflect as the compensating rig elevator is suspended by the bail arms and a tubular is placed in the compensating rig elevator. The bail arms actuate a locking mechanism to secure the compensating rig elevator in a closed position around the tubular. The compensating rig elevator can also have compensating rams and a slip system to positively engage the tubular and bear the weight of multiple tubulars.

A compensating rig elevator is provided to eliminate set-down weight from threaded connectors during make-up of a pipe stand and thereby provide an ability to reduce the risk of thread galling and cross-threading. The elevator may comprise one or more hoist assemblies with bail arms that deflect as the compensating rig elevator is suspended by the bail arms and a tubular is placed in the compensating rig elevator. The bail arms actuate a locking mechanism to secure the compensating rig elevator in a closed position around the tubular. The compensating rig elevator can also have compensating rams and a slip system to positively engage the tubular and bear the weight of multiple tubulars.

Aspects of the disclosure relate to counterbalance systems for catwalk systems, and related methods. A counterbalance system pulls a trough of a catwalk system while actuating the catwalk system. A catwalk system includes a chassis, a main arm pivotably coupled to the chassis, a trough pivotably coupled to the chassis and having one or more rollers, a V-door ramp pivotably coupled to the chassis, and a counterbalance system coupled to the trough at a coupling point. The counterbalance system includes a first sheave suspended from the V-door ramp, a second sheave suspended from the first sheave, and a counterbalance rope wound at least partially about the first sheave and the second sheave. A first end of the counterbalance rope is coupled to the trough at the coupling point.

Aspects of the disclosure relate to counterbalance systems for catwalk systems, and related methods. A counterbalance system pulls a trough of a catwalk system while actuating the catwalk system. A catwalk system includes a chassis, a main arm pivotably coupled to the chassis, a trough pivotably coupled to the chassis and having one or more rollers, a V-door ramp pivotably coupled to the chassis, and a counterbalance system coupled to the trough at a coupling point. The counterbalance system includes a first sheave suspended from the V-door ramp, a second sheave suspended from the first sheave, and a counterbalance rope wound at least partially about the first sheave and the second sheave. A first end of the counterbalance rope is coupled to the trough at the coupling point.

A compensating rig elevator is provided to eliminate set-down weight from threaded connectors during make-up of a pipe stand and thereby provide an ability to reduce the risk of thread galling and cross-threading. The elevator may comprise one or more hoist assemblies with bail arms that deflect as the compensating rig elevator is suspended by the bail arms and a tubular is placed in the compensating rig elevator. The bail arms actuate a locking mechanism to secure the compensating rig elevator in a closed position around the tubular. The compensating rig elevator can also have compensating rams and a slip system to positively engage the tubular and bear the weight of multiple tubulars.

A compensating rig elevator is provided to eliminate set-down weight from threaded connectors during make-up of a pipe stand and thereby provide an ability to reduce the risk of thread galling and cross-threading. The elevator may comprise one or more hoist assemblies with bail arms that deflect as the compensating rig elevator is suspended by the bail arms and a tubular is placed in the compensating rig elevator. The bail arms actuate a locking mechanism to secure the compensating rig elevator in a closed position around the tubular. The compensating rig elevator can also have compensating rams and a slip system to positively engage the tubular and bear the weight of multiple tubulars.

Aspects of the disclosure relate to counterbalance systems for catwalk systems, and related methods. A counterbalance system pulls a trough of a catwalk system while actuating the catwalk system. A catwalk system includes a chassis, a main arm pivotably coupled to the chassis, a trough pivotably coupled to the chassis and having one or more rollers, a V-door ramp pivotably coupled to the chassis, and a counterbalance system coupled to the trough at a coupling point. The counterbalance system includes a first sheave suspended from the V-door ramp, a second sheave suspended from the first sheave, and a counterbalance rope wound at least partially about the first sheave and the second sheave. A first end of the counterbalance rope is coupled to the trough at the coupling point.

Aspects of the disclosure relate to counterbalance systems for catwalk systems, and related methods. A counterbalance system pulls a trough of a catwalk system while actuating the catwalk system. A catwalk system includes a chassis, a main arm pivotably coupled to the chassis, a trough pivotably coupled to the chassis and having one or more rollers, a V-door ramp pivotably coupled to the chassis, and a counterbalance system coupled to the trough at a coupling point. The counterbalance system includes a first sheave suspended from the V-door ramp, a second sheave suspended from the first sheave, and a counterbalance rope wound at least partially about the first sheave and the second sheave. A first end of the counterbalance rope is coupled to the trough at the coupling point.

A portal pile driver, and a cast-in-place pile construction method are provided, relating to the technical field of pile foundation construction. The portal pile driver includes a portal frame, a pile frame platform, a moving assembly, and a lifting assembly. The portal frame is erected at one side of the pile frame platform, and a power head is installed on the portal frame. A loading zone is located at the pile frame platform, and a projection of a central shaft of the power head on the pile frame platform is located in an extension direction of the loading zone. The moving assembly is located at one side or each of both sides of the loading zone, and multiple drill pipes are horizontally distributed on the moving assembly, and each drill pipe is perpendicular to a plane where the portal frame is located.