ProTension可以在作业过程中保持连续控制，避免井控问题发生！ 编译 | 惊蛰 D&L公司近日推出了ProTension安全张力工具（STT），当提拉管柱使其处于张力状态时，该工具可消除潜在井控问题和风险。此外，利用该工具，开发商能够安全地安装油管锚以及其他受张力的井下工具。 对于需要人工举升的油井，ProTension STT绝对是理想选择。当生产管柱处于张力状态时，该工具可确保油井的持续控制。当它安装于油管挂与生产油管之间时，无需移除防喷器（BOP）或过度拉伸油管，即可将张力传递至作业管柱中。 ProTension STT无需使用部分种类卡瓦，有助于保护作业人员免受高张力载荷的危险。一旦油管挂着陆(隔离环空)，张力就会传递至管柱中，在不保持井控的情况下，安全地锁定在适当的位置。ProTension STT允许管柱自由旋转，从而可安装井下工具。 ProTension安全张力工具非常适用于大位移水平井、多级压裂井以及人工举升油井。当生产管柱处于张力状态时，该工具可确保持续的井控。 利用上部*英尺小装置可计算生产油管长度，安装油管锚。然后拆除防喷器，“过提”油管，用Low Line卡瓦（无额定载荷）固定。移除这个*英尺的小装置，将油管挂添加到管柱中，然后下放至卡瓦的圈口。完成后，即可重新布置防喷器。 在多数情况下，作业前需要拆卸并检查该工具，以确保在运输过程中没有零件损坏。重新组装后，遵守检查程序，确保正确地拧紧所有接头。当调整工具时，一般需要更换所有密封件、元件、O形环、剪切螺丝等。如有需要，D&L公司可以提供修理工具以及其他零件更换的信息。 将张力工具拼装在油管挂与生产油管之间，并完全伸展开该工具。然后下入油管串，直到油管挂着陆。标记油管挂位置，连接油管，安装锚、封隔器等井下工具。下放油管，使油管挂位于指定位置，使油管处于受压状态。 装配井下打捞矛以及送入工具，将打捞矛穿过管柱，下放至张力工具以下，向左旋转，激活该工具。随后提拉打捞矛，确保其与张力工具啮合，且张力工具随之移动。 提拉工具，达到所需张力，向右旋转四分之一圈，使之与最近的钩形槽啮合。接着下放张力工具，直到生产油管的所有载荷全部都释放出来。最后，向右旋转打捞矛，以释放该打捞矛，并从井中起出。最后，解封并移除锚、封隔器等井下工具。 对于储层压力高的应用，利用ProTension工具，多级压裂油井可实现长距离的水平段作业。在需要人工举升的井中，生产管柱将处于拉伸状态，该工具将改善常规作业中遇到的问题。另外，完井作业还需要利用不压井修井机，带压下入生产管柱与油管锚。 案例分析 Permian******苦苦寻求良策，以解决现场水力压裂作业对井筒状况的影响。通常，作业者将生产管柱着陆于不受张力的油管挂中，并利用井口采油树来承受液压，这会带来以下不利影响：*）压裂作业完成后，替换为低压抽油杆式采油树，并使油管柱处于拉伸状态，将成本逐渐增加；*）原油生产会中断。 另一种方法是，在压裂前将ProTension置于油管挂下方的生产管柱中。它的作用是使油管处于拉伸状态直到压裂作业开始，这样就能保证油井的持续生产。该工具允许在压裂作业期间使用带法兰的高压泵抽防喷器。压裂完成后，油井可立即恢复生产。 该油气公司在其体积压裂作业中，选择使用了ProTension系统，大幅缩短停产时间，以最低成本，使油井恢复生产。同时在高压作业环境中，提供了安全、最优的方法。? D&L Oil Tools introduces the patented ProTension Safe Tension Tool (STT), which was designed as a safety tool to eliminate the potential for loss of well control when pulling a tubing string into tension. Additionally, it allows operators to safely set tubing anchors and other downhole tools in tension. The ProTension STT is ideally suited for oil wells that will eventually require artificial lift. The tool ensures continuous well control when setting the production string in tension. When installed between the tubing hanger and production tubing,tension can be pulled into the work string without removing the blowout preventer (BOP) or overstretching the tubing. The ProTension STT eliminates the need to use Low Line or Shallow Well Slips and helps protect personnel from high-tension loads. Once the tubing hanger is landed (isloating the annulus), tension is pulled into the tubing string and safely locked into place without losing well control. The ProTension STT allows for free rotation of the tubing for setting downhole tools in the string. MAXIMUM PRODUCTION&MINIMUM RISK Ideally suited for long reach horizontal, multi-stage stimulated oil wells that will eventually require artificial lift, ProTension? Safe Tension Tool ensures continuous well control when setting the production string in tension. When installed between the tubing hanger and production tubing, tension can be applied to the work string without removing the blowout preventers (BOPs) or overstretching the tubing. Once the tubing hanger is landed, isolating the annulus, tension is pulled into the tubing string and safely locked into place without losing well control. Production tubing length is calculated with * ft pony on top and the anchor is set. The BOPs are then removed and tubing is “over pulled” and held with low line slips (no weight rating). The * ft pony is removed and a tubing hanger added to string and landed into bowl. Once complete, the BOPs are reconnected. GETTING STARTED It is recommended that you disassemble and inspect the tool, in most cases, to ensure parts have not been damaged during shipping. Once properly reassembled, our pre-installation inspection procedures include tightening/torqueing all connections properly before operating the tool. When redressing the tool, we recommend replacement of all seals, elements, o-rings, shear screws, etc. D&L can provide redress kits and other replacement part information, as needed. Make up the tension tool between the tubing hanger and the production tubing and fully extend the tension tool. Then, run the tubing string downhole until the tubing hanger is landed. Mark the position of the tubing hanger on the tubing, then pick up on the tubing and set the anchor, packer and other downhole tools. Set down the tubing to land the tubing hanger and put the tubing in compression. Assemble the downhole spear and spear extension to the length required to locate the spear below the tension tool. Lower the spear into the tubing below the tension tool and set the speak by rotating to the left until resistance is met. Pick up on the spear to ensure it is engaged and the tension tool is moving. Pick up on the tension tool until the desired tension is achieved. While holding the tension tool, rotate a */* right-hand turn at the tension tool to engage the nearest J-slot. Set down the tension tool until all weight from the production tubing is released. Then rotate to the right at the spear to release and remove the spear from the well. RELEASING PROCEDURES Assemble the downhole spear and the spear extension to the length required to locate the spear below the tension tool. Lower the spear into the tubing below the tension tool and rotate the spear to the left until slight torque is encountered. Pick up on the spear to confirm engagement. Next, pick up on the tension tool and rotate a */* left-hand turn at the tension tool to move J-pin out of the J-slot and set down the tubing to fully extend the tension tool and all weight from the production tubing is released. Rotate the spear to the right to release and remove the spear from the well. Lastly, unset anchor, packer and other downhole tools and remove from the well.? HIGH RESERVOIR PRESSURE APPLICATION For high reservoir pressure applications, the ProTension tool offers a long-reach horizontal for multi-stage stimulated oil wells. That will require eventual artificial lift so production tubing to be set in tension. Additionally, well completion requires snubbing units to snub “tubing light” production string with tubing anchor. The Safe Tension Tool allows tubing string to be put in tension during live well conditions. Case study A Permian Basin E&P customer sought way(s) to reduce the operational impact to prospective frac interference wells before, during and after infield hydraulic fracturing operations. Conventionally, landing production tubing in hanger without tension and utilizing a production tree on the wellhead to withstand the pending hydraulic pressure to an existing legacy oil well wellhead brings the following undesirables: *) Incrementally added cost post frac interference to replace production tree to lower pressure rod tree and to place tubing string in tension; and *) Oil production is interrupted for a prolonged period of time. Alternatively, ProTension is placed in the production tubing string beneath the hanger pre-frac. It is actuated to place the tubing string in tension – the well is producing right up until frac operations are to commence. It allows for flanged high pressure rod ***.******.***.s to be used during frac operations and production can immediately be brought back online post frac. The Permian Basin E&P customer chose to utilize the ProTension system within their frac interference operation as it: CONCLUSIONGreatly reduced oil production deferment Required minimal cost to bring well back to production Safely and optimally provided a means to operate within a high-pressure environment