A casing lifting system includes a spreader bar, a first lifting cap, and a second lifting cap. The first lifting cap is configured to engage a first end of a first section of drilling casing, and the first lifting cap includes a first lifting lug. The second lifting cap is configured to engage a second end of the first section of drilling casing opposite the first end of the first section of drilling casing, and the second lifting cap includes a second lifting lug. In some embodiments, each of the first and second lifting caps are configured for coupling adjacent to opposing lateral ends of the spreader bar by respective first and second elastic stabilizers coupled between the first and second lifting lugs and first attachment points adjacent to the opposing lateral ends of the spreader bar.

A casing lifting system includes a spreader bar, a first lifting cap, and a second lifting cap. The first lifting cap is configured to engage a first end of a first section of drilling casing, and the first lifting cap includes a first lifting lug. The second lifting cap is configured to engage a second end of the first section of drilling casing opposite the first end of the first section of drilling casing, and the second lifting cap includes a second lifting lug. In some embodiments, each of the first and second lifting caps are configured for coupling adjacent to opposing lateral ends of the spreader bar by respective first and second elastic stabilizers coupled between the first and second lifting lugs and first attachment points adjacent to the opposing lateral ends of the spreader bar.

A method of automatically conveying an object, using a suspending moving device and a robot having an arm configured to hold the object, the suspending moving device including a suspender and a moving mechanism configured to move the suspender, and the suspender including a coupler configured to be coupled to the object and a suspending member configured to suspend the coupler, is provided. The method includes a step for locating the coupler of the suspender at a given first position, a step for locating the object at a given second position, a step for causing the robot to hold the coupler located at the first position and coupling the held coupler to the object located at the second position, and a step for causing the suspending moving device to move, by the moving mechanism, the object coupled to the coupler together with the suspender.

A method of automatically conveying an object, using a suspending moving device and a robot having an arm configured to hold the object, the suspending moving device including a suspender and a moving mechanism configured to move the suspender, and the suspender including a coupler configured to be coupled to the object and a suspending member configured to suspend the coupler, is provided. The method includes a step for locating the coupler of the suspender at a given first position, a step for locating the object at a given second position, a step for causing the robot to hold the coupler located at the first position and coupling the held coupler to the object located at the second position, and a step for causing the suspending moving device to move, by the moving mechanism, the object coupled to the coupler together with the suspender.

An apparatus including a base, a guide arm pivotable relative to the base, the guide arm movable between a raised position and a lowered position. A tension linkage has a distal end extending away from the base, the tension linkage supported by the guide arm when the arm is in the raised position. A tension linkage guide is disposed on the guide arm, the tension linkage guide movable along the tension linkage as the guide arm moves between raised and lowered positions. A hook is connected to the distal end of the tension linkage. When the hook is engaged with an object, the tension linkage forms a first tension angle and a second tension angle when the guide arm is in the raised position and the lowered position respectively, the second tension angle being less than the first tension angle.

An apparatus including a base, a guide arm pivotable relative to the base, the guide arm movable between a raised position and a lowered position. A tension linkage has a distal end extending away from the base, the tension linkage supported by the guide arm when the arm is in the raised position. A tension linkage guide is disposed on the guide arm, the tension linkage guide movable along the tension linkage as the guide arm moves between raised and lowered positions. A hook is connected to the distal end of the tension linkage. When the hook is engaged with an object, the tension linkage forms a first tension angle and a second tension angle when the guide arm is in the raised position and the lowered position respectively, the second tension angle being less than the first tension angle.

An overhead transport system includes a first placement part that can have placed thereon an article held by an article holder in a state where the article is placed thereon, and also articles do not interfere with each other when the article holder and a lift driver are projected; a second placement part that can have placed thereon the article held by the article holder in a state where the article holder and the lift driver have been projected by the second projection length by the lateral extender; and a third placement part arranged below the track and can have placed thereon an article held by the article holder, wherein the first and third placement parts are provided at the same height.

An overhead transport system includes a first placement part that can have placed thereon an article held by an article holder in a state where the article is placed thereon, and also articles do not interfere with each other when the article holder and a lift driver are projected; a second placement part that can have placed thereon the article held by the article holder in a state where the article holder and the lift driver have been projected by the second projection length by the lateral extender; and a third placement part arranged below the track and can have placed thereon an article held by the article holder, wherein the first and third placement parts are provided at the same height.

A transport vehicle for transporting a transportation-target object to a placement location that is provided at a lower position, includes: a supporting portion configured to support the transportation-target object; a lifting/lowering portion configured to lift and lower the transportation-target object in a suspended state; and a weight detecting portion configured to detect a weight of the transportation-target object, wherein a lowering speed of the transportation-target object is increased after a detection value that is detected by the weight detecting portion while the transportation-target object is being lowered by the lifting/lowering portion in a state where the transportation-target object is supported by the supporting portion has become smaller than or equal to a first set value, and thereafter, the supporting of the transportation-target object by the supporting portion is canceled after the suspending of the transportation-target object by the lifting/lowering portion has been canceled.

A transport vehicle for transporting a transportation-target object to a placement location that is provided at a lower position, includes: a supporting portion configured to support the transportation-target object; a lifting/lowering portion configured to lift and lower the transportation-target object in a suspended state; and a weight detecting portion configured to detect a weight of the transportation-target object, wherein a lowering speed of the transportation-target object is increased after a detection value that is detected by the weight detecting portion while the transportation-target object is being lowered by the lifting/lowering portion in a state where the transportation-target object is supported by the supporting portion has become smaller than or equal to a first set value, and thereafter, the supporting of the transportation-target object by the supporting portion is canceled after the suspending of the transportation-target object by the lifting/lowering portion has been canceled.