diff --git a/AsbCloudInfrastructure/Services/Subsystems/SubsystemOperationTimeService.cs b/AsbCloudInfrastructure/Services/Subsystems/SubsystemOperationTimeService.cs
index 0bb1d58f..c252a21a 100644
--- a/AsbCloudInfrastructure/Services/Subsystems/SubsystemOperationTimeService.cs
+++ b/AsbCloudInfrastructure/Services/Subsystems/SubsystemOperationTimeService.cs
@@ -59,8 +59,8 @@ namespace AsbCloudInfrastructure.Services.Subsystems
             }
             if (request.SelectMode == SubsystemOperationTimeRequest.SelectModeTrim)
             {
-                var begin = request.GtDate ?? throw new ArgumentNullException(nameof(request.GtDate));
-                var end = request.GtDate ?? throw new ArgumentNullException(nameof(request.LtDate));
+                var begin = request.GtDate ?? query.Min(d => d.DateStart).UtcDateTime; 
+                var end = request.LtDate ?? query.Max(d => d.DateEnd).UtcDateTime; 
                 var data = query.ToList();
                 data = Trim(data, begin, end);
                 return data.Select(o => Convert(o, well));
@@ -79,7 +79,9 @@ namespace AsbCloudInfrastructure.Services.Subsystems
         }
         private List<SubsystemOperationTime> Trim(List<SubsystemOperationTime> data, DateTime gtDate, DateTime ltDate)
         {           
-            var itemsToTrim = data.Where(q => q.DateStart == gtDate & q.DateEnd == ltDate)
+            var itemsToTrim = data.Where(q =>         
+            (q.DateStart >= gtDate && q.DateStart <= ltDate)||
+            (q.DateEnd >= gtDate && q.DateEnd <= ltDate))
                 .Select(o => new SubsystemOperationTime
                 {
                     Id = o.Id,
@@ -87,29 +89,28 @@ namespace AsbCloudInfrastructure.Services.Subsystems
                     DateEnd = ltDate > o.DateEnd ? ltDate : o.DateEnd,
                     IdSubsystem = o.IdSubsystem,
                     IdTelemetry = o.IdTelemetry,
-                    DepthEnd = o.DepthEnd,
-                    DepthStart = o.DepthStart,
+                    DepthEnd = ltDate>o.DateEnd ? null : o.DepthEnd,
+                    DepthStart = gtDate < o.DateStart ? null : o.DepthStart,
                     Subsystem = o.Subsystem,
                     Telemetry = o.Telemetry
                 })
                 .ToList();
             return itemsToTrim;
         }
-        private IEnumerable<SubsystemStatDto> CalcStat(IEnumerable<SubsystemOperationTimeDto> groupedData, SubsystemOperationTimeRequest request)
+        private IEnumerable<SubsystemStatDto> CalcStat(IEnumerable<SubsystemOperationTimeDto> listOperationTimeSubsystems, SubsystemOperationTimeRequest request)
         {
             var result = new List<SubsystemStatDto>();
-            var groupedDataSubsystems = groupedData
+            var groupedDataSubsystems = listOperationTimeSubsystems
                 .GroupBy(x => x.IdSubsystem);
-            var periodGroupTotal = groupedData
-                .GroupBy(x => x.IdSubsystem)
-                .Sum(g => g.Sum(o=> (o.DateEnd - o.DateStart).TotalHours));            
+            var periodGroupTotal = groupedDataSubsystems
+                .Sum(g => g.Sum(o=> (o.DateEnd - o.DateStart).TotalHours));
+            var gtDate = request.GtDate ?? listOperationTimeSubsystems.Min(d => d.DateStart);
+            var ltDate = request.LtDate ?? listOperationTimeSubsystems.Max(d => d.DateEnd);
+            var periodRequest = listOperationTimeSubsystems
+                    .Sum(o => (o.DateEnd - o.DateStart).TotalHours);
             foreach (var item in groupedDataSubsystems)
             {                
                 var periodGroup = item.Sum(g => (g.DateEnd - g.DateStart).TotalHours);
-                var gtDate = request.GtDate ?? item.Min(d => d.DateStart);
-                var ltDate = request.LtDate ?? item.Max(d => d.DateEnd);
-                var periodRequest = item.Where(o => o.DateStart>=gtDate  && o.DateEnd <= ltDate)
-                    .Sum(o =>  (o.DateEnd - o.DateStart).TotalHours);
                 int idSubsystem = item.First().IdSubsystem; 
                 var subsystemStat = new SubsystemStatDto()
                 {
@@ -125,23 +126,23 @@ namespace AsbCloudInfrastructure.Services.Subsystems
         }
         private IQueryable<SubsystemOperationTime>? BuildQuery(SubsystemOperationTimeRequest request)
         {
-            var idTelemetry = wellService.GetOrDefault(request.IdWell)?.IdTelemetry;
-            if (idTelemetry is null)
+            var well = wellService.GetOrDefault(request.IdWell);
+            if (well?.IdTelemetry is null || well.Timezone is null)
                 return null;
-
             var query = db.SubsystemOperationTimes
             .Include(o => o.Subsystem)
-            .Where(o => o.IdTelemetry == idTelemetry);
+            .Where(o => o.IdTelemetry == well.IdTelemetry);
             
             if(request.IdsSubsystems?.Any() == true)
                 query = query.Where(o => request.IdsSubsystems.Contains(o.IdSubsystem));
 
-           
+
             if (request.GtDate is not null)
-                query = query.Where(o => o.DateStart >= request.GtDate.Value);
+            
+                query = query.Where(o => o.DateStart >= request.GtDate.Value.ToUtcDateTimeOffset(well.Timezone.Hours));
 
             if (request.LtDate is not null)
-                query = query.Where(o => o.DateEnd <= request.LtDate.Value);
+                query = query.Where(o => o.DateEnd <= request.LtDate.Value.ToUtcDateTimeOffset(well.Timezone.Hours));
            
             
             if (request.GtDepth is not null)