diff --git a/AsbCloudApp/Services/IWellOperationService.cs b/AsbCloudApp/Services/IWellOperationService.cs
index e9ebc920..61b9b4b0 100644
--- a/AsbCloudApp/Services/IWellOperationService.cs
+++ b/AsbCloudApp/Services/IWellOperationService.cs
@@ -28,7 +28,7 @@ namespace AsbCloudApp.Services
         /// <returns></returns>
         Task<PaginationContainer<WellOperationDto>> GetOperationsAsync(
                     WellOperationRequest request,
-                    CancellationToken token = default);
+                    CancellationToken token);
 
         /// <summary>
         /// Получить статистику операции по скважине с группировкой по категориям
@@ -38,7 +38,7 @@ namespace AsbCloudApp.Services
         /// <returns></returns>
         Task<IEnumerable<WellGroupOpertionDto>> GetGroupOperationsStatAsync(
                     WellOperationRequest request,
-                    CancellationToken token = default);
+                    CancellationToken token);
 
         /// <summary>
         /// Получить операцию по id
@@ -46,7 +46,7 @@ namespace AsbCloudApp.Services
         /// <param name="id"></param>
         /// <param name="token"></param>
         /// <returns></returns>
-        Task<WellOperationDto> GetOrDefaultAsync(int id, CancellationToken token);
+        Task<WellOperationDto?> GetOrDefaultAsync(int id, CancellationToken token);
 
         /// <summary>
         /// Добавить несколько операций за один раз
diff --git a/AsbCloudInfrastructure/Services/WellOperationService/WellOperationService.cs b/AsbCloudInfrastructure/Services/WellOperationService/WellOperationService.cs
index 43207ba8..54e559ba 100644
--- a/AsbCloudInfrastructure/Services/WellOperationService/WellOperationService.cs
+++ b/AsbCloudInfrastructure/Services/WellOperationService/WellOperationService.cs
@@ -78,7 +78,7 @@ namespace AsbCloudInfrastructure.Services.WellOperationService
 
         public async Task<PaginationContainer<WellOperationDto>> GetOperationsAsync(
             WellOperationRequest request,
-            CancellationToken token = default)
+            CancellationToken token)
         {
             var timezone = wellService.GetTimezone(request.IdWell);
 
@@ -124,7 +124,7 @@ namespace AsbCloudInfrastructure.Services.WellOperationService
 
         public async Task<IEnumerable<WellGroupOpertionDto>> GetGroupOperationsStatAsync(
             WellOperationRequest request,
-            CancellationToken token = default)
+            CancellationToken token)
         {
             var query = BuildQuery(request);            
             var entities = await query
@@ -176,7 +176,7 @@ namespace AsbCloudInfrastructure.Services.WellOperationService
         }
 
         public async Task<WellOperationDto?> GetOrDefaultAsync(int id,
-            CancellationToken token = default)
+            CancellationToken token)
         {
             var entity = await db.WellOperations
                 .Include(s => s.WellSectionType)
@@ -198,7 +198,7 @@ namespace AsbCloudInfrastructure.Services.WellOperationService
 
         public async Task<int> InsertRangeAsync(
             IEnumerable<WellOperationDto> wellOperationDtos,
-            CancellationToken token = default)
+            CancellationToken token)
         {
             var firstOperation = wellOperationDtos
                 .FirstOrDefault();
@@ -222,7 +222,7 @@ namespace AsbCloudInfrastructure.Services.WellOperationService
         }
 
         public async Task<int> UpdateAsync(
-            WellOperationDto dto, CancellationToken token = default)
+            WellOperationDto dto, CancellationToken token)
         {
             var timezone = wellService.GetTimezone(dto.IdWell);
             var entity = dto.Adapt<WellOperation>();
@@ -233,7 +233,7 @@ namespace AsbCloudInfrastructure.Services.WellOperationService
         }
 
         public async Task<int> DeleteAsync(IEnumerable<int> ids,
-            CancellationToken token = default)
+            CancellationToken token)
         {
             var query = db.WellOperations.Where(e => ids.Contains(e.Id));
             db.WellOperations.RemoveRange(query);
diff --git a/AsbCloudWebApi/Controllers/WellOperationController.cs b/AsbCloudWebApi/Controllers/WellOperationController.cs
index 54c6f834..2fc8a757 100644
--- a/AsbCloudWebApi/Controllers/WellOperationController.cs
+++ b/AsbCloudWebApi/Controllers/WellOperationController.cs
@@ -123,7 +123,7 @@ namespace AsbCloudWebApi.Controllers
         [Route("{idOperation}")]
         [Permission]
         [ProducesResponseType(typeof(WellOperationDto), (int)System.Net.HttpStatusCode.OK)]
-        public async Task<IActionResult> GetAsync(int idWell, int idOperation,
+        public async Task<IActionResult> GetOrDefaultAsync(int idWell, int idOperation,
             CancellationToken token)
         {
             if (!await CanUserAccessToWellAsync(idWell, token).ConfigureAwait(false))
@@ -320,7 +320,7 @@ namespace AsbCloudWebApi.Controllers
             return File(stream, "application/octet-stream", fileName);
         }
 
-        private async Task<bool> CanUserAccessToWellAsync(int idWell, CancellationToken token = default)
+        private async Task<bool> CanUserAccessToWellAsync(int idWell, CancellationToken token)
         {
             int? idCompany = User.GetCompanyId();
             return idCompany is not null && await wellService.IsCompanyInvolvedInWellAsync((int)idCompany,