伸缩短节用于单管串完井和双管串完井。可用于生产井、注水井、处置井中以补偿油管的伸长或收缩变形。作为油管串的一部分，伸缩短节可随油管串整体下入，其内径与标准油管相同，可兼容其他井下控制工具。当封隔器及相关设备就位 后，伸缩短节便可通过剪断剪切销钉或者是下入电缆工具启动。

伸缩短节的剪钉可以通过拉力或挤压力而剪切, 可以在前期的完井作业中剪 切也可以在后期达到预定位置时剪切。这种伸缩短节可以在行程的任何位置销钉锁定，剪切值可以通过剪钉的数目调整。可补偿油管最大12FT的运动。

主要特性

◎ 可补偿各种作业环境下油管的变形；

◎ 通过调整销钉数量种类来调整剪切值；

◎ 包含三个锁定位置：开启位置、中心位置、闭合位置；

◎ 与标准规格油管有相同的通径。

注：可依据客户要求提供其他规格的产品。

TRAVEL JOINT

INTRODUCTION

Travel joint is designed for application in both single string and multiple string completions, and  provide alternative methods of compensating for the tubing contraction and elongation in producing,  injection, and disposal wells. It is run as an integral part of the tubing string and has a full tubing drift  ID which is compatible with other downhole control equipment. After the packers and associated  equipment are in place, travel joint may be activated. Depending on the application, travel joint may  be activated by shear pins or standard wireline tools. The travel joint may be sheared by tension or compression. They may also be sheared during initial  completion operations or left the pin to be sheared at a predetermined value later. The travel joint  can be pinned at any point in the stroke. The release value can be varied by the number of shear  screws. The tool can compensate for 10 ft tubing movement.

FEATURES

◎ compensating for tubing movement in various conditions; 

◎ shear screws easily added or removed to adjust shear value; 

◎ tool can be locked in open, mid-stroke, or closed positions; 

◎ ID of the tool is compatible with tubing ID.

Note: Other specification products are available.