公开(公告)号：US3795275A

公开(公告)日：1974-03-05

申请号：US3795275D

申请日：1972-10-25

Applicant: DRESSER IND

Inventor： BOHN F

IPC: E21B19/00 ,  E21B33/03 ,  B23P19/00

CPC classification number: E21B33/03 ,  E21B19/008 ,  Y10T29/53126 ,  Y10T29/53274

Abstract: A slotted, continuous elastomeric sheath is applied to a wireline as the wireline and its instruments connected thereto are lowered into a plastic lined tubing within an earth borehole, the elastomeric sheath being used to prevent damage to the plastic coating on the interior of the tubing. The tubular elastomeric sheath is wound on a storage drum for transportation and the application of the sheath to the wireline. The sheath passes through a measuring sheave having a throat positioned at the wireline to be covered. As the sheath approaches the wireline, an orienting finger is used within the slot in the sheath causing the slot to open up. The opening also results from a natural consequence of the sheath being bent about a radius with the slot in the sheath oriented to the outside of the sheave throat. Idler rollers are provided to facilitate the alignment of the sheath with the wireline. The measuring sheave is also used to monitor the linear velocity of the sheath as it is being removed from the wireline. The linear velocity of the wireline is also monitored and compared with the velocity of the sheath. An electrical comparator circuit drives a variable speed motor to either increase or decrease the velocity of the sheath to provide a means for removing the sheath from the wireline at the same velocity as the wireline as it is being hoisted from the well bore. During the application of the sheath to the wireline, the drum upon which the sheath is wound is allowed to rotate freely without the use of the motor and the sheath pulled off the drum by the frictional forces between the sheath and the wireline.

Abstract translation: 随着电缆及其与其连接的仪器下降到地球钻孔内的塑料衬里管中，开槽的连续的弹性护套被施加到电缆，弹性护套用于防止损坏管道内部的塑料涂层。 管状弹性体护套缠绕在存储滚筒上用于运输和将护套施加到电缆。 护套穿过测量滑轮，其具有位于待覆盖的电缆处的喉部。 当护套接近电缆时，定向指状物用于护套中的槽内，导致槽开放。 开口也是由护套围绕半径弯曲的自然结果造成的，护套中的槽定向到滑轮喉部的外侧。 提供惰辊以便于护套与电缆的对准。 测量滑轮也用于监测护套从线缆上移除时的线速度。 还监测电缆的线速度，并将其与护套的速度进行比较。 电子比较器电路驱动变速电动机以增加或降低护套的速度，以提供一种用于以与缆线相同的速度从电缆将电缆从井下提升的装置。 在将护套施加到电缆的过程中，允许在其上缠绕护套的滚筒自由旋转，而不需要使用马达，并且护套通过护套和电缆之间的摩擦力而从滚筒中脱出。