diff --git a/graphene/utils/extract_fields.py b/graphene/utils/extract_fields.py
deleted file mode 100644
index 963ec482..00000000
--- a/graphene/utils/extract_fields.py
+++ /dev/null
@@ -1,41 +0,0 @@
-import copy
-from .get_graphql_type import get_graphql_type
-
-from ..types.field import Field, InputField
-from ..types.unmountedtype import UnmountedType
-
-
-def extract_fields(cls, attrs):
-    fields = set()
-    _fields = list()
-    for attname, value in list(attrs.items()):
-        is_field = isinstance(value, (Field, InputField))
-        is_field_proxy = isinstance(value, UnmountedType)
-        if not (is_field or is_field_proxy):
-            continue
-        field = value.as_mounted(cls) if is_field_proxy else copy.copy(value)
-        field.attname = attname
-        field.parent = cls
-        fields.add(attname)
-        del attrs[attname]
-        _fields.append(field)
-
-    # All the fields are Graphene Fields or InputFields, so
-    # are orderable
-    return sorted(_fields)
-
-
-def get_base_fields(cls, bases):
-    fields = set()
-    _fields = list()
-    for _class in bases:
-        for attname, field in get_graphql_type(_class).get_fields().items():
-            if attname in fields:
-                continue
-            field = copy.copy(field)
-            if isinstance(field, (Field, InputField)):
-                field.parent = cls
-            fields.add(attname)
-            _fields.append(field)
-
-    return _fields
diff --git a/graphene/utils/tests/test_extract_fields.py b/graphene/utils/tests/test_get_fields.py
similarity index 59%
rename from graphene/utils/tests/test_extract_fields.py
rename to graphene/utils/tests/test_get_fields.py
index 7ccbf730..fbb3d0f4 100644
--- a/graphene/utils/tests/test_extract_fields.py
+++ b/graphene/utils/tests/test_get_fields.py
@@ -1,11 +1,11 @@
 from collections import OrderedDict
 from graphql import GraphQLField, GraphQLString, GraphQLInterfaceType, GraphQLInt, GraphQLFloat
-from ..extract_fields import extract_fields, get_base_fields
+from ..get_fields import get_fields_from_attrs, get_fields_from_types
 
 from ...types import Field, String, Argument, ObjectType
 
 
-def test_extract_fields_attrs():
+def test_get_fields_from_attrs():
     attrs = {
         'field_string': Field(String),
         'string': String(),
@@ -13,27 +13,26 @@ def test_extract_fields_attrs():
         'argument': Argument(String),
         'graphql_field': GraphQLField(GraphQLString)
     }
-    extracted_fields = list(extract_fields(ObjectType, attrs))
-    assert [f.name for f in extracted_fields] == ['fieldString', 'string']
-    assert sorted(attrs.keys()) == ['argument', 'graphql_field', 'other']
+    extracted_fields = OrderedDict(get_fields_from_attrs(ObjectType, attrs))
+    assert [f for f in extracted_fields.keys()] == ['field_string', 'string']
 
 
-def test_extract_fields():
+def test_get_fields_from_types():
     int_base = GraphQLInterfaceType('IntInterface', fields=OrderedDict([
         ('int', GraphQLField(GraphQLInt)),
         ('num', GraphQLField(GraphQLInt)),
         ('extra', GraphQLField(GraphQLInt))
     ]))
-    float_base = GraphQLInterfaceType('IntInterface', fields=OrderedDict([
+    float_base = GraphQLInterfaceType('FloatInterface', fields=OrderedDict([
         ('float', GraphQLField(GraphQLFloat)),
         ('num', GraphQLField(GraphQLFloat)),
         ('extra', GraphQLField(GraphQLFloat))
     ]))
 
     bases = (int_base, float_base)
-    base_fields = list(get_base_fields(ObjectType, bases))
-    assert [f.name for f in base_fields] == ['int', 'num', 'extra', 'float']
-    assert [f.type for f in base_fields] == [
+    base_fields = OrderedDict(get_fields_from_types(bases))
+    assert [f for f in base_fields.keys()] == ['int', 'num', 'extra', 'float']
+    assert [f.type for f in base_fields.values()] == [
         GraphQLInt,
         GraphQLInt,
         GraphQLInt,