FRP Sucker Rod System Candidate is a well exhibiting any or combination of the
following conditions
1. High Fluid Levels
High Fluid levels indicate that the well is potentially capable of producing more fluid.
Hingh fluid level wells can be an ongoing problem, particularly in mature waterflood.
In some cases, the production equipment in being utilized to full capacity. Under
these conditions, the existing equipment can not reduce fluid levels or increase
production. High fluid level wells can also make it difficult to treat effectively for
corrosion.
In high fluid level wells the FRP Sucker Rod System is an excellent choice to lower
the fluid level and increase production without overloading the existing surface
equipment.
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2. Overloaded Equipment
Equipment overloads can reduce the life expectancy of pumping units, rod strings,
and other production equipment. Use of the FRP Sucker, Rod System can result in a
reduction in equipment overloads. Sucker rods weigh approximately 70% less than
steel rods of comparable size, thereby reducing gearbox and structural loading ,
and eliminating the need for purchasing a larger and more expensive pumping unit.
The capacity of a gearbox to lift fluid is limited by the weight of the sucker rod
system utilized. Therefore, if the rod string weight can be reduced by the utilization
of a FRP Sucker Rod System, the gearbox's capacity to lift fluid will be increased.
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3. Wells Experiencing Frequent Rod Failures
Corrosion and stress generally go hand in hand. FRP Sucker Rod System consists
of a section of FRP sucker rods above steel rods, thereby reducing the number of steel
sucker rods exposed to corrosive fluids. More importantly, however, is the reduction in
stress to the steel sucker rods made possible by the lighter weight sucker rod system.
More corrosion resistant than standard stell rods, the FRP Sucker Rod System has been
highly successful in secondary and tertiary projects . The FRP end fitting material meets the requirements of API Specification 11C for Class "A" material which ineers NACE MR-01-75
for H-S Service.
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4. Wells With Capacity To Increase Production With Existing Equipment
Increased production is a direct result of the FRP Sucker Rod System's ability to
achieve overtravel. This ability is created byt he low modulus of elasticity the fiberglass
material possesses. In comparision, the FRP sucker rod has a modulus of elasticity
one-fourth than that of steel, thereby enabling it to stretch approximately four times
as much as a steel sucker rod. The overtravel generated by a FRP Sucker Rod System
provides and increase in production. This characteristic , plus the benfits of a lighter
weight rod string, allows the FRP Sucker Rod System to increase production without
overloading surface equipment.
5. Deep Wells
Deep Wells can be ideal candidates for a Sucker Rod System. Large volumes of fluid
can be litfed from great depths with less cost to the operator. FRP rods are 70% lighter
than steel rods, on the average , resulting in reduce polished rod loads and reduce
gearbox torque.
The end result allows operators to beam lift wells from deeper depths.
Advantages of using FRP Sucker Rod System
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FRP Sucker Rods
Technical Data & Operating Properties
mm |
19 (3/4") |
22(7/8") |
25 (1") |
30 (1, 2") |
32 (1, 25") |
38 (1, 5") |
mm
(-+0, 127) |
18,796 |
21,971 |
25,145 |
29,845 |
31,496 |
37,231 |
kg/m |
- |
0,7911 |
0,9847 |
1,3163 |
1,9348 |
2,0779 |
3,1222 |
- |
0,7549 |
0,9468 |
1,2673 |
1,8889 |
1,9973 |
2,9778 |
- |
0,7189 |
0,9000 |
1,2185 |
1,7629 |
1,9166 |
2,8350 |
API mm |
16 (5/8") |
19 (3/4") |
22 (7/8") |
25, 4 (1") |
25, 4 (1") |
29, 1 (125") |
(mm)
(+0,127)
(-0.000) |
32 |
38 |
50 |
51 |
51 |
60 |
API |
22 (7/8") |
25, 4 (1") |
25, 4 (1") |
28,6
(1,125") |
28,6
(1,125") |
- |
API |
22 (7/8") |
25, 4 (1") |
25, 4 (1") |
- |
- |
- |
(MPa) |
793 |
793 |
793 |
793 |
793 |
793 |
(KN) |
67 |
89 |
120 |
169 |
187 |
262 |
( MPa) |
241 |
241 |
241 |
241 |
241 |
241 |
(KN) |
102 |
140 |
182 |
253 |
289 |
405 |
(MPa) |
365 |
365 |
365 |
365 |
365 |
365 |
(°C) |
115 |
115 |
115 |
115 |
115 |
115 |
Rod Size |
3/4" |
7/8" |
1" |
1, 2" |
1, 25" |
1, 5" |
Rod Body Diameter (+0.005)
(-0.005) |
,740" |
, 865" |
, 990" |
1,175" |
1,240" |
1,465" |
Weight per FT
(LBS/ F-T) |
25" |
,5316 |
,6617 |
0,8845 |
1,3001 |
1,3963 |
2,0980 |
30" |
,5073 |
,6362 |
,8516 |
1,2424 |
1,3421 |
2,0010 |
37.5" |
, 4831 |
,6108 |
,8188 |
1,1846 |
1,2879 |
1,9080 |
API PIN Size |
5/8" |
3/4" |
7/8" |
1" |
1" |
1-1/8" |
Diameter of End Fitting |
1,245" |
1,490" |
1,615" |
1,990" |
1,990" |
2,360" |
Wrench |
7/8" |
1,0" |
1,0" |
1-1/8" |
1-1/8" |
Special |
Elevators |
7/8" |
1,0" |
1.0" |
Special |
Special |
Special |
Max Tensile & Yield Strength (PSI) |
115,000 |
115,000 |
115,000 |
115,000 |
115,000 |
115,000 |
Max Working Load
(LBS) |
15,000 |
20,000 |
27,000 |
38,000 |
42,000 |
59,000 |
Max Working Stress
(PSI) |
35,000 |
35,000 |
35,000 |
35,000 |
35,000 |
35,000 |
Max Load Short Term
(PSI) |
23,000 |
31,500 |
41,000 |
57,000 |
65,000 |
91,000 |
Max Stress Short Term (PSI) |
53,000 |
53,000 |
53,000 |
53,000 |
53,000 |
53,000 |
Max Design Temp
("F) |
240 " |
240 " |
240 " |
240 " |
240 " |
240 " |
Steel Sinker Bar
Mating with FRP Sucker Rod
We can supply our customers with steel sinker bar mated with FRP Sucker Rod.
The sinker bar is at the bottom of FRP rod and is connected with oil pump. The
main function of sinker bar is that it enables FRP sucker rod to prestretch and thus
improves the overtravel ability of FRP sucker rod. Moreover, it always keep the lower
part of the FRP sucker-rod string in tension during operation.
Geometric Parameter of Sinker Bar
Norminal
Specification |
Min Tubing Diameter
mm (inch) |
Weight/Length
kg/m
(pounds/feet) |
Weight per each sinker bar
kg(pounds) |
API endfitting
Specification |
Length
m (feet) |
38 (1-1/2") |
51 (2") |
8.93(6) |
68 (150) |
19 (3/4") |
7.62(25) |
41 (1-5/8") |
63 (2-1/2)" |
10.42(7) |
79.4(175) |
22 (7/8") |
7.62(25) |
44.5 (1-3 /4") |
63 (2-1/2)" |
12.20 (8.2) |
93(205) |
22 (7/8") |
7.62(25 |
