Jars

Drilling Jars Fishing Jars Shock Absorbers

Mechanical Drilling Jar Type JZ Full-Hydraulic Drilling Jar Type QYⅢ Hydro-Mechanical Drilling Jar Type JYQ Mechanical & Hydraulic Drilling Jar Type YJHM Full-Hydraulic Drilling Jar Type SS Model “ZJQ” Drilling Accelerator Two-action Drill Accelerator Type SZJQ Double Acting Full Hydraulic Drilling Jar Lock Type QYS

CS V type super shock absorber ZJS hydraulic accelerator KX Ⅱ Type Open Type Downloader BXJ Type Closed Downloader DJ type ground shaker DX type ground shaker ZDXJQ type vibration hammer DJQ type cable shaker

YJ type hydraulic shock absorber SJ type bidirectional shock absorber JZ-HY Ⅱ type mechanical hydraulic shock absorber HNG type constant torque thruster JZ-J heavy-duty shock absorber JZ-TS type cam shock absorber DQJ type top drive shock absorber XZQ type drill string shock absorber ZDQ type hydraulic oscillator Hydraulic Thruster Type TLQ
Drilling Tools

Drilling Tools

HYQ type eye scraper LX type integral spiral stabilizer YTLX hydraulic variable diameter stabilizer TSDJ type lifting short section ZTX type high-efficiency oscillation drag reduction tailpipe insertion device JYXZ type wellbore straightening tool XLQS type cyclone sand cleaner FMT type casing wear-resistant ring Borehole Dressing Tool Type JYXZ-M Hydraulic Hole Opener type KY Drilling Safety Joint Type AJ-SZ Reaming Stabilizer Type HYF Non-magnetic Drill Collars
Fishing Tools

Fishing Tools

AJ safety connector H/J type safety joint LT-T type retractable slip fishing drum LB type salvage cup LL type reverse circulation fishing basket LM type retractable slip fishing spear CL Strong Magnetic Salvage Device DLQ type multifunctional salvager DLM-T type retractable inverted fishing spear GZ type male cone MZ type female cone AZ-LM type multi-purpose casing salvage spear NG type mechanical internal cutting knife Hydraulic Internal Cutter Type AND-S WD-J type mechanical external cutting knife WD-S hydraulic external cutting knife Flat Bottom Junk Mill Type MXP Tapered Mill Type XZ Pilot Junk Mill Type GMX/YMX
Casing Accessories

Casing Accessories

GGQH IV type casing scraper GGQX Ⅱ High Efficiency Scraper GGQZ type casing scraper GGQM type brush scraper GX-M type sleeve brush scraper GQC type high-efficiency strong magnetic salvager QC Strong Magnetic Salvage Device ST type pressure test plug SZZ type double acting casing shaper Casing Compensator Type TBQ Lead Seal Casing Compensator type TBQ-Q Lead Seal Casing Compensator Type TBQ-QⅡ GGQH IV type casing scraper
Others

Others

FZF type drilling tool float valve HY type throwing back pressure valve JF type arrow check valve SJF type dual function arrow shaped back pressure valve XS III type square drill pipe plug QKF Ⅱ Type Fully Open Safety Valve NFQ type drilling tool internal blowout preventer Floating valve core LXF type continuous circulation valve FJ type arrow check valve Simple Assembly Stand Type JZP Hydraulic Test Stand Models S120, 1150, and 2200 Full-hydraulic Mounting Rack Type YZJ200 Bucking Unit Type YXD20
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Lead Seal Casing Compensator Type TBQ-QⅡ

The TBQ-QⅡ type lead seal Casing Compensator is a connector for the old and new casing after taking out the damaged tubing or casing in the well and then running the new tubing or casing.

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Casing Accessories

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Related Products

Two-action Drill Accelerator Type SZJQ

Two-action Drill Accelerator Type SZJQ can be stored energy by hydraulic spring. It should be applied with Hydraulic Drilling Jar jointly. The drill collar and Hydraulic Jar (below the Drill Accelerator ) can function an accelerated effect when jarring operates as for making the stuck point gain more jarring force. Meanwhile, it can decrease the damage of tremor produced by up-down jarring for drill tools above Drill Accelerator. Specifications 型号 Model 外径 O.D. mm(in) 水眼 I.D. mm(in) 接头螺纹Connection API 最大上击行程 Max. Up-jarring Stroke mm(in) 最大下击行程 Max. Down-jarring Stroke mm(in) 水眼压力 Hole Seal Pressure Mpa(psi) 许用拉力 Max Working Load kN(lbf) 屈服拉力 Yield Tension kN(lbf) 许用扭矩 Max Torque kN﹒m(lbf·ft) 屈服扭矩 Yield Torque kN﹒m(lbf·ft) 总长 Length mm(in) SZJQ95 95 (3 3/4) 32 (1 1/4) NC26 178 (7) 178 (7) 35 (5000) 600 (135000) 800 (180000) 4 (3000) 40 (29500) 6651 (261 7/8) SZJQ121 121 (4 3/4) 50 (2) NC38 178 (7) 178 (7) 1100 (247000) 1560 (350000) 15 (11000) 27 (20000) 7185 (282 ¾) SZJQ165 165 (6 1/2) 57 (2 1/4) NC50 165 (6 1/2) 165 (6 1/2) 2000 (450000) 3750 (700000) 25 (18400) 75 (55300) 7476 (294 3/8) SZJQ197 197 (7 3/4) 70 (2 3/4) 6 5/8REG 203 (8) 203 (8) 2600 (585000) 4000 (900000) 30 (22100) 100 (73700) 8000 (315) SZJQ203 203 (8) 70 (2 3/4) 6 5/8REG 203 (8) 203 (8) 2600 (585000) 4000 (900000) 30 (22100) 100 (73700) 8000 (315) SZJQ241 241 (9 1/2) 76 (3) 7 5/8REG 254 (10) 254 (10) 3500 (787000) 5800 (1300000) 40 (29500) 180 (133000) 7259 (285 ¾)

Model “ZJQ” Drilling Accelerator

Model “ZJQ” Drilling Accelerator can be stored energy by hydraulic spring as to increase the jarring force for Hydraulic Jar. It should be applied with Hydraulic Drilling Jar Type QYⅡ jointly. The drill collar and Hydraulic Jar (below the Drill Accelerator ) can function an accelerated effect when jarring operates as for making the stuck point gain more jarring force that can increase force for two times at the highest. Meanwhile, it can decrease the bounce-back shock after jarring as to protect the drill tools above Drill Accelerator. Specifications Model O.D. mm(in) I.D. mm(in) Connection API Max. Stroke mm Tension of full Stroke kN (lbf) Hole Seal Pressure Mpa(psi) Max Working Load kN(lbf) Max Torque kN﹒m(lbf·ft) Length mm(in) ZJQ46 121 (4-3/4) 50 (2) NC38 350 (13 3/4) 350 (78700) 30 1100 (247000) 15 (11000) 7430 (292 1/2) ZJQ62 159 (6 1/4) 57 (2 1/4) NC50 350 (13 3/4) 700 (157400) 30 1900 (420000) 25 (18400) 7780 (306 1/4) ZJQ64 165 (6 1/2) 57 (2 1/4) NC50 350 (13 3/4) 700 (157400) 30 2000 (449600) 25 (18400) 7780 (306 1/4) ZJQ76 197 (7 3/4) 61.9 (2 7/16) 6 5/8REG 350 (13 3/4) 1000 (224800) 30 2600 (584500) 30 (22120) 7630 (300 3/8) ZJQ80 203 (8) 76.2 (3) 6 5/8REG 350 (13 3/4) 1000 (224800) 30 3000 (674400) 45 (33200) 7752 (305 3/16) ZJQ95 241 (9 1/2) 76 (3) 7 5/8REG 350 (13 3/4) 1200 (270000) 30 4000 (900000) 60 (44200) 6752 (265 13/16)

Full-Hydraulic Drilling Jar Type SS

Type SS is a hydraulic up-jarring stuck freeing tool while drilling. It adopts needle valve structure. The tool is hydraulic up jarring only, which can realize stepless adjustment of up-jarring tonnage. Simple structure, easy operation and easy maintenance. Specifications Model Tool OD mm (in) ID mm (in) Connection API Allowable Working Tensile kN(lb) Allowable Working Torque kN· m(lb· ft) Max. Up Jarring kN(lb) Up Stroke mm Open Length mm SS127 127 (5) 50 (2) NC38 1100 (250000) 15 (11000) 350 (78000) 152 4209 SS172 172 (6-3/4) 57 (2 1/4) NC50 2000 (450000) 25 (18000) 700 (160000) 152 4461 SS203 203 (8) 76.2 (3 ) 6 5/8REG 2800 (630000) 35 (26000) 1000 (225000) 152 4514

Mechanical & Hydraulic Drilling Jar Type YJHM

Model “YJHM” Drilling Jar belongs to the advanced product of model JYQ Jar. The up jarring can be acted by hydraulic as to realize the stepless tonnage control. The new hydraulic valve machine makes up-jarring more stable and reliable. The down jarring can be acted mechanically. And the adjusting mechanism designed specially can realize manual regulation of down-jarring tonnage; the special slips construction makes down-jarring more stable and larger service. It can adopt the new special material for higher property and safety. It can be used for directional hole, deep hole and so on. Specifications Model O.D. mm (in) I.D. mm (in) Connection API Max. Upward Jarring force kN(lb) Max. Downward jarring force kN(lb) Max working Load kN(lb) Tensie Yield Strength kN(lb) Max.Working Torque kN(ft.lbs) Torsional Yield Strength kN(ft.lbs) length mm (in) YJ165HM 165 (6-1/2) 57 (2-1/4) NC50 700 (156000) 350 (78000) 2000 (450000) 3750 (843000) 25 (18000) 75 (55000) 9000 (354.3) YJ203HM 203 (8) 71.4 (2-3/4) 6 5/8REG 1000 (225000) 450 (100000) 2800 (630000) 6650 (1495000) 35 (25800) 145 (100000) 9000 (354.3)

Hydro-Mechanical Drilling Jar Type JYQ

Model JYQ Drilling Jar can integrate the mechanical and hydraulic. The up jarring can be acted by hydraulic as to realize the stepless control of up jarring tonnage. The lock mechanism designed specially can avoid the mistaken jarring of up. The down jarring can be acted mechanically. It can adopt the new special material for higher property and safety. It can be used for directional hole, deep hole and so on. SpecificationsModelO.D.mm(in)I.D.mm(in)ConnectionAPIMax. UpwardJarring forcekN(lb)Max. Downward jarring forcekN(lb)Max working LoadkN(lb)Tensie Yield StrengthkN(lb)Max.Working TorquekN(ft.lbs)Torsional Yield StrengthkN(ft.lbs)lengthmm(in)JYQ121Ⅱ121(4-3/4)57.2(2 1/4)NC38350(78000)250(56000)900(200000)1350(300000)15(11000)27(20000)4500(117.17)JYQ159159(6-1/4)57(2 1/4)NC46700(156000)350(78000)1600(360000)2700(600000)25(18000)65(48000)5007(197.13)JYQ165165(6-1/2)70(2 3/4)NC50700(156000)350(78000)2000(450000)3200(720000)25(18000)75(55000)5256(206.93)JYQ178178(7)70(2 3/4)NC50800(180000)400(90000)2400(540000)3200(720000)30(22000)80(59000)5256(206.93)JYQ197197(7-3/4)76.2(3)6 5/8REG1000(225000)450(100000)2600(580000)5100(1150000)30(22000)100(74000)5095(200.6)JYQ203203(8)76.2(3)6 5/8REG1000(225000)450(100000)2800(630000)5200(1170000)35(25800)145(100000)5095(200.6)JYQ241241(9-1/2)76.2(3)7 5/8REG1400(315000)500(112000)3500(780000)9500(2100000)40(30000)180(130000)5300(208.6)

Full-Hydraulic Drilling Jar Type QYⅢ

Full Hydraulic Drilling Jar Type QYⅢ adaptes the needle valve type structure, the up and down impact are both hydraulic, can realize the up and down tonnage stepless adjustment. It can effectively protect the drill string and improve the service life. The hydraulic energy storage mechanism adopts patent design and has good stability. Delay time range: 30s ~ 240s, Working temperature range: -40℃ ~ 180℃. Adopt new special materials, with higher performance and safety. Widely used in drilling, coring, workover, fishing and so on. SpecificationsModelTool ODmm(in)IDmm(in)ConnectionAPIAllowable Working TensilekN(Ib)Allowable Working TorquekN· m(lb· ft)Max. Up JarringkN（Ib)Max. Down JarringkN（Ib)Up StrokemmDown StrokemmOpen LengthmmQY108Ⅲ108(4 1/4)38(1 1/2)NC31800(180000)10(7000)250(55000)120(26000)1521525835QY121Ⅲ121(4 3/4)50(2)NC381100(250000)15(11000)350(78000)180(40000)1521525768QY127Ⅲ127(5)50(2)NC381100(250000)15(11000)350(78000)180(40000)1521525768QY140Ⅲ140(5 1/2)50(2)NC381100(250000)15(11000)350(78000)180(40000)1521525768QY159Ⅲ 159(6 1/4)57(2 1/4)NC462000(450000)30(22000)700(160000)350(78000)1521525939QY165Ⅲ 165(6 1/2)57(2 1/4)NC502000(450000)30(22000)700(160000)350(78000)1521525939QY172Ⅲ 172(6 3/4)57(2 1/4)NC502000(450000)30(22000)700(160000)350(78000)1521525939QY178Ⅲ178(7)70(2 3/4)NC502400(540000)35(25800)800(180000)400(90000)1521526000QY203Ⅲ203(8)76.2(3)6 5/8REG2800(630000)45(33000)1000(225000)500(110000)1521526000QY216Ⅲ216(8 1/2)76.2(3)6 5/8REG2800(630000)45(33000)1000(225000)500(110000)1521526000QY229Ⅲ229(9)76.2(3)7 5/8REG3000(630000)65(26000)1200(270000)600(132000)1521526106

Mechanical Drilling Jar Type JZ

Model “JZ” Mechanical Drilling Jar is a drill jarring and stuck releasing tool belongs to our factory. It can integrate the up jar and down jar resulting in releasing the stuck accidents occurred in the drilling operation. SpecificationsModelO·D·mm(in)I.D.mm(in.)Connection（API）Allowable TensilekN(lbs)Allowable TorquekN·m(lbs·ft)Pump Open Areac㎡Up Stroke mmDown Stroke mmOAL (Locking position)mmJZ95Ⅱ95(3 3/4)25(1)2 7/8REG600(135000)4(3000)34.61491665624JZ108Ⅱ108(4 1/4)36(1 27/64)NC31800(180000)10(7400)402032036404JZ121Ⅱ121(4 3/4)45(1 3/4)NC381100(247000)15(11000)481982066354JZ127127（5）45(1 3/4）NC381200(270000）15(11000）481982066354JZ140140（5 1/2）50（2）NC381350(303000）20(15000）591501656300JZ159Ⅳ159(6 1/4)57(2 1/4)NC461600(360000)25(18500)781491666517JZ165Ⅱ165(6 1/2)57(2 1/4)NC502000(450000)25(18500)781491666517JZ178Ⅱ178(7)71.4(2 13/16)NC502400(540000)30(22000)931601827266JZ203Ⅱ203(8)71.4(2 13/16)6 5/8REG2800(630000)35(25800)1361601827234JZ229Ⅱ229(9)76(3)7 5/8REG3000(670000)35(25800)1812032037754

Double Acting Full Hydraulic Drilling Jar Lock Type QYS

Double Acting Full Hydraulic Drilling Jar Type QYS, both the stroke up and down are hydraulic, and equipped with locking devices, not only realize stepless adjustment of the jar force, but also avoid the occurrence of false jarring.

Non-magnetic Drill Collars

Hydraulic Internal Cutter Type AND-S

Model “AND-S” Hydraulic Internal Cutter can be lowered into desired depth from cutted pipes string. The increased pump pressure can push piston downward as to make blade stretch. And the blade rotates in company with drill tool to start cutting. It can be used for all kinds of casing, tubing and drill pipe in oil/geology department. If it is equipped with the spear, cutting and fishing can be completed at the same time. SpecificationsModelO.D.mm(in)I.D.mm(in)ConnectionAPIO.D of the pipe to be cut Min, mm(in)Max,mm(in)AND-S140111(4.37)38(1-1/2)2 7/8 REG140(5-1/2)245(9-5/8)AND-S178146(5.74)38(1-1/2)3 1/2 REG178(7)406(16)AND-S245211(8.30)71(2-13/16)6 5/8 REG245(9 5/8)762(30)AND-S273238(9.37)71(2-13/16)6 5/8 REG273(10 -3/4)914(36)AND-S340296(11.65)89(3-1/2)6 5/8 REG340(13-3/8)1524(60)AND-S340T305(12)89(3-1/2)6 5/8 REG340(13-3/8)1524(60)AND-S406368(14.48)89(3-1/2)6 5/8 REG340(13-3/8)1524(60)

Bucking Unit Type YXD20

The Bucking Unit Type YXD20 is a hydraulic make-up and break-out machine. The unit allows the operator to apply a torque to a connection without damaging the surface of the tool. It is designed for fast, easy servicing of drilling tools in either workshop or drill site locations. SpecificationsModelRating power kW(ft.lb/s)Max. Working Pressure of Hydraulic SystemMPa(bar)Rotation Rate(r/min)Tank Volume(L)Working MediumYXD207.5(5530)31.5(315)144080L-HM32anti-wear hydraulic oilThe Caliber of Service Toolmm(in)Strokemm(in)Working Pressure of Pneumatic SystemMPa(bar)Unscrew TorquekN·m(tf·m)Make-up TorquekN·m(tf·m)Physical Dimensionmm(in) (L×W×H)Φ80～Φ304(3 1/8～12)1000(39 3/8)0.5～1(5～10)250(25)190(19)5400×1760×1770( 213×69×70 )

Full-hydraulic Mounting Rack Type YZJ200

This is controlled by hydraulic pressure, Model “YZJ 2000” Mounting Rack can not only make-up and screw off a large torque, but also rotate the thread quickly without the changed tooth block for five synchronous held. It has many advantages of complete function, high automaticity, larger application and safety and so on. Moreover, it is suitable to serve the down-hole tools for oil filed pipe shop and petroleum machinery manufacturer. SpecificationsModelRating power kW(ft.lb/s)Max. Working Pressure of Hydraulic SystemMPa(bar)Rotation Rate(r/min)Tank Volume(L)Working MediumYZJ20011(7820)28(280)150080L-HM32anti-wear hydraulic oilThe Caliber of Service Toolmm(in)The Held Length Scope of Calibermm(in)Make-up TorquekN·m(tf·m)Unscrew TorquekN·m(tf·m)Physical Dimensionmm(in) (L×W×H)The Stand Held Center-heightmm(in)Φ80～Φ380(3 1/8～15)≥1000( ≥39 )200(20)200(20)12540×1460×1850( 494×57×73 )1140(44 7/8)

Hydraulic Test Stand Models S120, 1150, and 2200

The Hydraulic Jar Tester is self contained unit that are designed to test the tensile property and pressure property of drilling jars, fishing jars and other down-hole tools.

Simple Assembly Stand Type JZP

It is a simple semi-mechanized equipment, being suitable for assembling and disassembling various shafts and casing parts of the fishing and jarring tools. SpecificationsModelStroke of the Working Hydraulic Cylindr mm(in)Stroke of the Hand Hydraulic Cylindr mm(in)The Caliber of Service Tool mm(in)Physical Dimension mm(in) (L×W×H)JZP980(38 1/2)180(7 3/32)Φ100～Φ230(4～9)8000×490×1320( 315×19×52 )

Pilot Junk Mill Type GMX/YMX

Model “GMX” Pilot Junk Mill can be inserted into milling fish-top of fishes water-hole from the polit part. Model YMX Guide Mill Shoe can be used for milling inner bore and fish-top, or the unfixed fishes ( just like drill pipe, drill collar and tubing etc. ) The milling surface can be made of carbide alloy, and the water groove on mill body can make the drilling fluids flow. SpecificationsNominal O.D. mm(in)Connection APImm(in)Suitable well diameter mm(in)97(3.82)NC2673～89(2.87～3.5)107.9～114.3(4.25～4.5)121(4.76)NC31、2-7/8REG、3-1/2REG90～102(3.54～4)130～139.7(5.11～5.5)130(5.12)100～160(3.93～6.3)142.9～152.4(5.63～6)140(5.51)110～120(4.33～4.72)155.6～165.1(6.13～6.5)156(6.14)3-1/2REG127(5)168～187.3(6.6～7.37)178(7)4-1/2REG158～168(6.22～6.61)190.5～209.5(7.5～8.25)200(7.87)168～178(6.61～7)212.7～241.3(8.37～9.5)232(9.13194(7.64)244.5～269.9(9.62～10.63)257(10.12)6-5/8REG210～219(8.26～8.62)273～295.3 (10.75～11.63)279(10.98)220～230(8.66～9)298.5～317.5 (11.75～12.5)295(11.61)240～246(9.45～9.68)320.6～346.1 (12.62～13.63)330(13)273(10.74)349.3～406.4 (13.75～16)381(15)320(12.61)406.4～444.5 (16～17.5)

Tapered Mill Type XZ

The Tapered Mill Type XZ is used to recover bore size. It is mainly used to mill collapsed casing or eliminate restrictions, and can clear mineral crystals and some other hard debris stranding on the well wall. SpecificationsNominal O.D. mm(in)Connection APISuitable Hole Diameter mm(in)89(3.50)NC26、3-3/8REG95.2～101.6 (3.76～4)97(3.82)107.9～114.3(4.25～4.5)110(4.33)NC31、2-7/8REG、3-1/2REG117.5～127.0(4.63～5)121(4.76)130～139.7(5.11～5.5)130(5.12)142.9～152.4(5.63～6)140(5.51)NC38、3-1/2REG、4-1/2REG155.6～165.1(6.13～6.5)156(6.14)168～187.3(6.6～7.37)178(7)190.5～209.5(7.5～8.25)200(7.87)NC50、4-1/2REG212.7～241.3(8.37～9.5)232(9.13244.5～269.9(9.62～10.63)257(10.12)6-5/8REG273～295.3(10.74～11.63)279(10.98)298.5～317.5(11.75～12.5)295(11.61)320.6～346.1(12.62～13.63)330(13)349.3～406.4(13.75～16)381(15)406.4～444.5(16～17.5)406(15)7-5/8REG431.8～508(17～20)432(17)457.2～533.4(18～21)534(21)558.8～660(22～26)686(27)711.2～863.6(28～34)

Flat Bottom Junk Mill Type MXP

Junk Mill Type MXP can be divided into three kinds: flat-bottom (or concave-bottom) milling shoe, guide milling shoe and cone milling shoe, according to its structure and shape. At the milling surface, the carbide particles are built up by welding, which plays a part of self-milling. It is used to mill the fallen substances, such as tooth wheel, slipdog, fittings for deep-well pump, etc. with the advantages of anti impact and longer service life. SpecificationsModelO.D. mm(in)Connection APIOverall length mm(in)MXP(A)80C-2A3080(3 1/8)2 3/8REG300(11 3/4)MXP(A)89C-2A3089(3 1/2)2 3/8REG500(19 5/8)MXP(A)92C-NC2392(3 5/8)NC23500(19 5/8)MXP(A)102C-210102(4)NC31500(19 5/8)MXP(A)108C-2A10108(4 1/4)NC26500(19 5/8)MXP(A)114C-210114(4 1/2)NC31500(19 5/8)MXP(A)146C-310146(5 3/4)NC38500(19 5/8)MXP(A)159C-310159(6 1/4)NC38500(19 5/8)MXP(A)190C-410190(7 1/2)NC50500(19 5/8)MXP(A)203C-410203(8)NC50500(19 5/8)MXP(A)292C-630292(11 1/2)6 5/8REG500(19 5/8)MXP(A)305C-630305(12)6 5/8REG500(19 5/8)MXP(A)410C-730410(16 1/8)7 5/8REG450(17 5/8)MXP(A)425C-630425(16 3/4)6 5/8REG500(19 5/8)

WD-S hydraulic external cutting knife

It is usually connected with the washover pipe and can cut the fish at its any section. Compared with the mechanically-actuated one, it has the advantages of simple operation and quick cutting.

WD-J type mechanical external cutting knife

It is spring fed automatically so that it can avoid the cutter breakdown which may be resulted from the larger pulling force.

NG type mechanical internal cutting knife

it is pressured to rotate for cutting the drill string. If it is equipped with the spear, cutting and recovering can be completed at the same time.

FJ type arrow check valve

Arrow Back-Pressure Sub Type FJ is an important kind of internal blowout preventer, with the function of preventing high-pressure oil and gas from blowing out of the drill string.

LXF type continuous circulation valve

Model LXF continuous circulating valve is a kind of key tools used in continuous circulating well-drilling technology. The purpose is to solve a series of problems under the well caused by annulus pressure fluctuation due to the stop/start the circulation when unloading a single column during the well-drilling and stripping-in process.

Floating valve core

In normal well-drilling, the valve cover of the floating valve core opens, then the drilling fluid circulates smoothly.

NFQ type drilling tool internal blowout preventer

Model NFQ inner blowout preventer (Grey Valve) is a necessary blowout preventing device during drilling process specified by IADC (International Association of Drilling Contractors).

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SAF Coolest v1.3.1.2 设置面板GWOSD-ZHIU-VFAVE-ZXA

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Model	Tool outer diameter (mm)	Joint thread	Usage specifications and performance parameters
Model	Tool outer diameter (mm)	Joint thread	Maximum allowable tensile force（kN）	Specification of supplementary sleeve mm（in）
TBQ-QⅡ245	Ф291	----	2200	245(9 5/8)
TBQ-QⅡ340	Ф388	----	\	340(13 3/8)
TBQ-QⅡ508	Ф575	----	\	508(20)

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SAF Coolest v1.3.1.2 设置面板GWOSD-ZHIU-VFAVE-ZXA

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