Managing of overpull issues/the best drilling practices

Dear forum members I have 3 questions with regard to modern drilling practices: 1.Wiper trips practices We are trying to avoid excessive wiper and check trips when there is no need for one in our local land operations in Ukraine. In the past we would do check trips every 200m regardless of the hole conditions. However we understand that at some point we have to do check trips, for instance when there are excessive overpulls or before running the casing or wireline etc. We would like to hear what are your practices for wiper trips? When do you normally decide to do one? Are there any numbers you are guided by, like overpulls? 2. Connections practice We also would like to hear what connection practices are you generally applying in your operations and why. For reference, we drill one stand and wipe the hole up and down once to the distance of one drill pipe while circulating cuttings above BHA. We try not to backream to avoid shale breakouts upper in the hole. 3. Backreaming What is your practice for backreaming? Are you trying to avoid it whenever possible or not and why. I understand much will depend on local geological conditions but still would like to hear your general approaches. Appreciate your thoughts. Regards Denys

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