diff --git a/AsbCloudApp/Data/Subsystems/SubsystemActiveWellStatDto.cs b/AsbCloudApp/Data/Subsystems/SubsystemActiveWellStatDto.cs
index f940bfb1..fd3c1054 100644
--- a/AsbCloudApp/Data/Subsystems/SubsystemActiveWellStatDto.cs
+++ b/AsbCloudApp/Data/Subsystems/SubsystemActiveWellStatDto.cs
@@ -14,7 +14,7 @@ namespace AsbCloudApp.Data.Subsystems
         /// <summary>
         /// Наработки подсистем
         /// </summary>
-        public List<SubsystemStatDto> listSubsystemStat { get; set; }
+        public IEnumerable<SubsystemStatDto> listSubsystemStat { get; set; }
 
     }
 }
\ No newline at end of file
diff --git a/AsbCloudInfrastructure/Services/Subsystems/SubsystemOperationTimeService.cs b/AsbCloudInfrastructure/Services/Subsystems/SubsystemOperationTimeService.cs
index 9add54b0..65c68188 100644
--- a/AsbCloudInfrastructure/Services/Subsystems/SubsystemOperationTimeService.cs
+++ b/AsbCloudInfrastructure/Services/Subsystems/SubsystemOperationTimeService.cs
@@ -192,24 +192,21 @@ namespace AsbCloudInfrastructure.Services.Subsystems
         // скважинам
 
 
-        private async Task<IEnumerable<WellDto>> GetSubsystemOperationTimeAll(int idCompany, CancellationToken token)
+        private async Task<IEnumerable<WellDto>> GetActiveWellByCompany(int idCompany, CancellationToken token)
         {   
             var listWell = await wellService.GetWellsByCompanyAsync(idCompany, token);
             var active = listWell.Where(w => w.IdState == 1);            
             return active;
-        }
+        }      
+
+
         public async Task<IEnumerable<SubsystemActiveWellStatDto>?> GetStatByActiveWell(int idCompany, DateTime? gtDate, DateTime? ltDate, CancellationToken token)
         {
-            var activeWell = await GetSubsystemOperationTimeAll(idCompany, token);
+            var activeWell = await GetActiveWellByCompany(idCompany, token);
             var telemetryIds = activeWell.Select(w => w.IdTelemetry).Distinct();
             var query = db.SubsystemOperationTimes
                 .Where(o => telemetryIds.Contains(o.IdTelemetry))
-                .AsNoTracking();
-
-            if (query is null)
-            {
-                return null;
-            }
+                .AsNoTracking();            
             DateTime today = DateTime.Today;
             if (!gtDate.HasValue)
             {
@@ -222,9 +219,13 @@ namespace AsbCloudInfrastructure.Services.Subsystems
                 ltDate = today.AddDays(-1);
             }            
             query = query.Where(o => o.DateEnd <= ltDate.Value.ToUniversalTime()); 
-            var result = new List<SubsystemActiveWellStatDto>();            
-            var subsystemsOperationTime = query.ToList();
-            var groupingSubsystemsOperationTime = subsystemsOperationTime.GroupBy(g => g.IdTelemetry).ToList();            
+            var result = new List<SubsystemActiveWellStatDto>();
+            if (query is null)
+            {
+                return null;
+            }
+            var subsystemsOperationTime = await query.ToListAsync(token);
+            var groupingSubsystemsOperationTime = subsystemsOperationTime.GroupBy(g => g.IdTelemetry);            
 
             foreach (var group in groupingSubsystemsOperationTime)
             {
@@ -246,13 +247,13 @@ namespace AsbCloudInfrastructure.Services.Subsystems
                 if (detectedOperations is not null && detectedOperations.Any())
                 {
                     var depthInterval = GetDepthInterval(detectedOperations);
-                    var groupSubsystem = group.GroupBy(g => g.IdSubsystem).ToList();
+                    var groupSubsystem = group.GroupBy(g => g.IdSubsystem);
 
                     foreach (var subsystem in groupSubsystem)
                     {
                         var dto = subsystem.Select(s => s.Adapt<SubsystemOperationTimeDto>());
                         var subsystemStat = CalcStat(dto, depthInterval);
-                        wellStat.listSubsystemStat.AddRange(subsystemStat);
+                        wellStat.listSubsystemStat.Concat(subsystemStat);
                     }
                     result.Add(wellStat);
                 }
diff --git a/AsbCloudWebApi/Controllers/Subsystems/SubsystemOperationTimeController.cs b/AsbCloudWebApi/Controllers/Subsystems/SubsystemOperationTimeController.cs
index 55b3b26b..7790472f 100644
--- a/AsbCloudWebApi/Controllers/Subsystems/SubsystemOperationTimeController.cs
+++ b/AsbCloudWebApi/Controllers/Subsystems/SubsystemOperationTimeController.cs
@@ -49,18 +49,19 @@ namespace AsbCloudWebApi.Controllers.Subsystems
         /// <summary>
         /// получить статистику  по активным скважинам
         /// </summary>
+        /// <param name="GtDate"> Больше или равно дате </param>
+        /// <param name="LtDate"> Меньше или равно дате </param>
+        /// <param name="token"> Токен  </param>
+        /// <returns> </returns>
         [HttpGet("statByActiveWell")]
         [ProducesResponseType(typeof(IEnumerable<SubsystemStatDto>), (int)System.Net.HttpStatusCode.OK)]
-        public async Task<IActionResult> GetStatByWellAsync([FromQuery] DateTime? GtDate, DateTime? LtDate, CancellationToken token = default)
+        public async Task<IActionResult> GetStatByWellAsync(DateTime? GtDate, DateTime? LtDate, CancellationToken token = default)
         {
             var idCompany = User.GetCompanyId();
-            if (idCompany.HasValue)
-            {
-                var subsystemResult = await subsystemOperationTimeService.GetStatByActiveWell(idCompany.Value, GtDate, LtDate, token);
-                return Ok(subsystemResult);
-            }
-            return Forbid();            
-            
+            if (!idCompany.HasValue)
+                return Forbid();
+            var subsystemResult = await subsystemOperationTimeService.GetStatByActiveWell(idCompany.Value, GtDate, LtDate, token);
+            return Ok(subsystemResult);
         }
 
         /// <summary>