摘要:
A continuous well string injector features a frame carrying a pair of endless chain conveyors on opposite sides of a pathway. Each chain carries gripper dies for engaging the continuous well string when received in the pathway. A respective skate and cylinder block reside in the closed loop path of each chain. Each cylinder block features a plurality of blind bores having open ends facing toward the respective skate, and a respective piston is slidably disposed within each bore. Hydraulic extension and retraction ports open into the cylinder bores on opposite sides of the piston, whereby back and forth displacement of the pistons forces the skates toward and away from one another to grip and release the continuous well string. A front wall of the frame has an open horizontal gap aligned with the pathway to enable lateral entrance and exit of the continuous string to and from the pathway.
摘要:
The invention is directed to a marine tensioner (1) for handling an elongated article from an offshore vessel. The tensioner comprises a tensioner frame (11), multiple track units (20), wherein each track unit comprises an elongated chassis (30) and an endless track supported by said chassis, wherein between the chassis of each track unit and the tensioner frame a connecting structure (40,140) is provided that at least allows for lateral motion of the track unit with respect to the passage axis (26) so as to adapt the position of the track unit. For each track unit a group of hydraulic squeeze cylinders (50a, 50b, 50c) is provided between the tensioner frame and the chassis of the track unit. The tensioner further comprises a tilting mechanism (60) for the group of squeeze cylinders of each track unit, said tilting mechanism being adapted to tilt the hydraulic squeeze cylinders of a track unit between an operative position, wherein the squeeze cylinders are operative to exert a squeeze force in use of the tensioner for handling an elongated article, and an oversized article passage position.
摘要:
A mechanism (10) for feeding a length of twisted pair cable (15), comprises a driven capstan (11) and a continuous belt (17) defining, respectively, first and second contact surfaces for the twisted pair cable (15). The continuous belt (17) is supported and arranged so that a portion thereof embraces an arc (16) of the substantially circular periphery of the capstan (11). Drive means are provided to effect rotation of the capstan (11), so as to feed a length of twisted pair cable (15) along the arcuate path (16) defined between the first and second contact surfaces where the arc (16) of the capstan (11) intersects the continuous belt (17). The arcuate path (16) is sufficiently narrow such that the capstan (11) and the continuous belt (17) embrace the length of twisted pair cable (15), and sufficiently long such that at least two nodes (19) of said length of twisted pair cable (15) are accommodated therein. This arrangement ensures feeding of the twisted pair cable (15) along the arcuate path (16) without causing rotation of the cable (15) about its axis.
摘要:
A capstan belt (80) is mounted on a pair of pulleys (82,83) for engagement with the surface of a draw capstan (75), the capstan belt (80) being driven for rotation on the pair of pulleys (82,83) by rotational movement of the capstan (75). A coated optical fiber (35) is drawn between the capstan (75) and the capstan belt (80). At least a surface of the capstan belt (80) is manufactured of a very low modulus material which easily deforms when contacting the coated optical fiber (35) such that the belt material deforms rather than the coating on the fiber during contact between the belt and the coated fiber. An idler belt (78) may surround the capstan (75) and an idler pulley (79), at least the surface of the idler belt (78) being manufactured of the same or similar material as the capstan belt (80). The belt material has a modulus of elasticity in the range of 10 to 200 PSI (0.07 to 1.38 MPa) at 10% strain and 200 to 5000 PSI (1.38 to 34.5 MPa) at 100% strain. Additionally, the abrasion resistance of the belt material when tested in accordance with ASTM C501 (1,000 cycles at 1,000 gram load) is in the range of 10 to 200. The tear properties of the belt material (as measured in accordance with ASTM D 624 die C) are in the range of 100 to 1000 lb/linear inch (1.75.times.104 to 1.75.times.105 nt/m). The compression properties of the belt material in accordance with ASTM D395 are in the range of 1 to 20% (set, method A) or in the range of 5 to 50% (set, method B).
摘要翻译:主导带(80)安装在一对滑轮(82,83)上,用于与牵引绞盘(75)的表面接合,主动轮带(80)被驱动以在一对滑轮(82,83)上旋转 )通过绞盘(75)的旋转运动。 涂覆光纤(35)被拉伸在绞盘(75)和主导带(80)之间。 主导带(80)的至少表面由非常低模量的材料制成,当与涂覆的光纤(35)接触时容易变形,使得带材料在带和带之间的接触期间变形而不是纤维上的涂层变形 涂层纤维。 惰轮(78)可以围绕主导轴(75)和惰轮(79),至少空转带(78)的表面由与主导带(80)相同或相似的材料制成。 带材料在10%应变下的弹性模量为10〜200PSI(0.07〜1.38MPa),在100%应变下的弹性模量为200〜5000PSI(1.38〜34.5MPa)。 另外,当按照ASTM C501(1000克负载1000次循环)测试时,带材料的耐磨性在10至200的范围内。带材料的撕裂性能(根据ASTM D 624模具测量 C)在100至1000lb /线性英寸(1.75×104至1.75×105nt / m 2)的范围内。 根据ASTM D395的带材料的压缩性能在1〜20%(设定方法A)的范围内或5〜50%的范围(方法B)。
摘要:
A belt piddler having two vertically mounted endless belts having contiguous vertical sections to form a means for gripping a continuous advancing length of material is modified to improve operability by grooving the surfaces of the belts which contact each other. The grooves are across the entire width of each belt and preferably are continuous.
摘要:
A flexible lance drive device has at least one drive motor in a first portion of a housing and a drive axle projecting across a second portion of the housing carrying a cylindrical spline drive roller. A plurality of cylindrical guide rollers on fixed axles span across the second portion of the housing aligned parallel to the spline drive roller. An endless belt wrapped around the at least one spline drive roller and guide rollers has a generally smooth outer surface and a transverse splined inner surface having splines shaped complementary to splines on the spline drive roller. A bias member supports a plurality of follower rollers each aligned vertically above one of the at least one spline drive roller and guide rollers operable to press each follower roller toward one of rollers to frictionally grip a flexible lance hose when sandwiched between the follower rollers and the endless belt.
摘要:
Disclosed is a laying device (1) of the tensioner type for the controlled clamping and moving of an elongated body, intended to be carried by a laying tower. The laying device (1) includes an annular frame (10) including two mobile frame parts (101) that each include at least one guiding box (11) and that are assembled to an element (13) for the fastening of the laying device (1) to the tower (2), through a main pivot element (14). The main pivot element (14) defines a single main rotation axis (14′), around which the mobile frame parts (101) are rotationally operable between the closed/open configurations.
摘要:
The present disclosure relates to a device for tensioning and gripping a tubular elongated element (3), designed to be placed on a bottom of an expanse of water from a surface placement installation, characterized in that it includes six tracks (11) uniformly distributed around a circumference and forming a space between them for the passage of the elongated element, each track being rotated by motor means (17, 18) integrated into said track (11) and being supported by a reinforcing chassis that can be moved between a passive retracted position of the track (11) and an active position pressing said track (11) against the elongated element.
摘要:
An optical fiber pay-out system utilizes over-the-end pay-out from a storage spool (34) into a module (38) adjacent the pay-out end of the spool. The module has a freely rotatable capstan (47) affixed thereto over a portion of the surface of which are endless belt (63) is in contact. A nozzle member (42) directs the paid out fiber into the region of belt and surface contact. Height adjusting members (72) are provided for imparting a twist to the fiber in the region by directing the fiber to an off-center position relative to the centerline of contact of the belt and surface of the capstan.
摘要:
Apparatus for introducing yarn into draw-texturing machines wherein means are provided between the draw and texturing apparatus for enlarging the normal yarn path thus providing a start yarn reserve and releasing the yarn upon start of the texturing apparatus.