摘要:
A sleeving apparatus and process for simultaneously expanding and rolling a vertical sleeve to produce an interference joint between the sleeve and a heat exchanger tube. The apparatus comprises upper and lower rollers and hydraulic expanders capable of applying a radially expansive force onto a sleeve across the length of the rollers. The rollers are driven by a common drive shaft coupled to a hydraulic motor. A torque controller including a torque sensor and a computer controls the torque, and hence the roiling pressure. The rolling pressure exerted by the rolls , elongates the metal in the sleeve at the interference joint to the same extent to which this metal is contracted by the hydraulic expanders, thereby resulting in a substantially stress-free joint.
摘要:
A tube expansion method of fixing a heat exchanger tube (105) inserted to a tube hole (104a) of a tubesheet (104) by tube expansion including: when there is damage (104b) along a circumferential direction with respect to an inner circumferential surface in the middle axis of an axis (S1) direction of the tube hole, a first hydraulic tube expansion step of performing hydraulic tube expansion at a pressure of 15% and 70% in a range including the damage, and thereafter, a second hydraulic tube expansion step of performing each liquid tube expansion at a pressure of 100% in each range divided except the damage.
摘要:
A pipe expansion method capable of reducing an inspection range (area) of a heat-transfer pipe secured to a pipe plate and capable of shortening the time required for inspection is provided. In a pipe expansion method for securing a heat-transfer pipe (13) inserted in a pipe hole (3a) of a pipe plate (3) by expanding the pipe, after tightly fitting an outer circumferential surface of the heat-transfer pipe (13) to an inner circumferential surface of the pipe hole (3a) from a primary-side end face to a secondary-side end face of the pipe plate (3), surface pressure between the heat-transfer pipe (13) and the pipe plate (3) is further increased in a predetermined range from the secondary-side end face, or close to the secondary-side end face, towards the primary-side end face.
摘要:
Methods and apparatus for shaping pipes, tubes, liners, or casing at downhole locations in wells. Use is made of rollers bearing radially outwards against the inside wall of the pipe (etc.), the rollers being rolled around the pipe to cause outward plastic deformation which expands and shapes the pipe to a desired profile. Where one pipe is inside another, the two pipes can be joined without separate components (except optional seals). Landing nipples and liner hangers can be formed in situ. Valves can be deployed to a selected downhole location and there sealed to the casing or liner without separate packers. Casing can be deployed downhole in reduced-diameter lengths and then expanded to case a well without requiring larger diameter bores and casing further uphole. The invention enables simplified downhole working, and enables a well to be drilled and produced with the minimum downhole bore throughout its depth, obviating the need for large bores. When expanding lengths of casing, the casing does not need to be anchored or made pressure-tight. The profiling/expansion tools of the invention can be deployed downhole on coiled tubing, and operated without high tensile loads on the coiled tubing.
摘要:
Methods and apparatus for shaping pipes, tubes, liners, or casing (200) at downhole locations in wells. Use is made of rollers (116) bearing radially outwards against the inside wall of the pipe (etc.), the rollers being rolled around the pipe to cause outward plastic deformation which expands and shapes the pipe to a desired profile. Where one pipe (180) is inside another (190), the two pipes can be joined without separate components (except optional seals (208)). Landing nipples and liner hangers can be formed in situ. Valves can be deployed to a selected downhole location and there sealed to the casing or liner without separate packers. Casing can be deployed downhole in reduced-diameter lengths and then expanded to case a well without requiring larger diameter bores and casing further uphole. The invention enables simplified downhole working, and enables a well to be drilled and produced with the minimum downhole bore throughout its depth, obviating the need for large bores. When expanding lengths of casing, the casing does not need to be anchored or made pressure-tight. The profiling/expansion tools (100) of the invention can be deployed downhole on coiled tubing, and operated without high tensile loads on the coiled tubing.
摘要:
Methods and apparatus for shaping pipes, tubes, liners, or casing (200) at downhole locations in wells. Use is made of rollers (116) bearing radially outwards against the inside wall of the pipe (etc.), the rollers being rolled around the pipe to cause outward plastic deformation which expands and shapes the pipe to a desired profile. Where one pipe (180) is inside another (190), the two pipes can be joined without separate components (except optional seals (208)). Landing nipples and liner hangers can be formed in situ. Valves can be deployed to a selected downhole location and there sealed to the casing or liner without separate packers. Casing can be deployed downhole in reduced-diameter lengths and then expanded to case a well without requiring larger diameter bores and casing further uphole. The invention enables simplified downhole working, and enables a well to be drilled and produced with the minimum downhole bore throughout its depth, obviating the need for large bores. When expanding lengths of casing, the casing does not need to be anchored or made pressure-tight. The profiling/expansion tools (100) of the invention can be deployed downhole on coiled tubing, and operated without high tensile loads on the coiled tubing.
摘要:
A tubing expander (10) comprises a body (12) carrying a plurality of radially movable piston-mounted rollers (24) and associated sleeves (16) mounted about the body (12) and being radially supported by the rollers (12). The expander (10) is positioned in a length of tubing of a first diameter, the pistons (28) extended, and the expander (10) rotated such that the sleeves (16) roll around the inner surface of the tubing and expand the tubing to a larger second diameter.
摘要:
Ein Umformwerkzeug (1) hat zwei exzentrisch angeordnete Wälzkörper (2,3), deren Exzentrizität derart verstellbar ist, daß der Durchlaß zwischen den Wälzkörpern (2,3) an der engsten Stelle dem bei der Umformung zu erreichenden Durchmesser entspricht. Die Wälzkörper (2,3) sind in Außenringen (6,7) drehbar gelagert und Wälzkörper (2,3) und Außenringe (6,7) sind derart geneigt, daß die Wirkkräfte (21,22) in einer Ebene liegen und damit ein Kippmoment vermieden wird. Außerdem sind Wälzkörper (2,3) und Außenringe (6,7) derart an einem Werkzeuggrundkörper (10) gelagert, daß sie durch einen Drehantrieb taumelnd rotieren. Vorzugsweise ist ein Winkel α zwischen der Normalachse und der Verbindungslinie der Berührungspunkte zwischen den Wälzkörpern (2,3) und dem Werkstück (14) zwischen 0° und 90° einstellbar. Dadurch wird ein schraubenlinienförmiger Vorschub ermöglicht.
摘要:
A swaging unit (12) which is portable and which has a locking fitting to co-operate with separable components (22,23) to secure a sleeve (11) in an engagement with the swaging unit. In this manner, a tube (10) can be swaged onto the sleeve. The locking fitting has internal threads (29) which engage with external threads (27) on the separable components to facilitate engagement. The swaging unit can be finely adjusted by having fine threads (52) between a locknut (45) and a cage (20) for housing the mandrel (13).