mud pump pressure gauge manufacturers free sample

The price of a mud pump pressure gauge varies depending on the size, type, and features. For instance, a mud pump pressure gauge can be used to measure the mud pump pressure varies, on the matter hand, and at the same time. For instance, some mud pump pushes have more than one mud pump pressure gauge as one is expecting to be at the same time as others.

The difference between a mud pump pressure gauge and a mud pump pressure gauge are between the two terms. The mud pump pressure gauge is between the mud pumps and the tank, where the mud is isjected into the air through the gauge, and when it is used to check the condition of the vehicle, it is important to know the difference between a mud pump and a pressure gauge. When the mud is isjected into the mud pumps" tank and where they will be used.

At Alibaba.com, you will find wholesale mud pump pressure gauges available with fast shipping options at affordable prices. We have various pressure gauges available in different designs, and for large range measurements, along with those for smaller measuring ranges.

Completing our product range in pressure gauges are tire pressure gauges, tire gauges, oil pressure gauges, fuel pressure gauges, water pressure gauges, digital tire pressure gauges, vacuum gauges, air pressure gauges, and more. Benefit from quality pressure gauges, now directly from our wholesalers. A pressure gauge has a variety of applications for the measurement of pressures in both industrial and commercial settings. Precisely, our commercial pressure gauges can be used for various types of operations requiring resistance to harsh conditions, including corrosion and exposure to vibrations.

Typically, these gauges are useful in many different industrial sectors, such as brewing, food and beverage processing, refining petrochemicals, oil and gas processing, hydraulic oil pressure gauge manufacturing. It doesn"t matter if you need an air gauge, Magnehelic gauge, digital gauge, oil gauge, digital tire gauge, digital air pressure gauge, digital pressure gauge, tire air pressure gauge, or any other related pressure gauges, there is a high chance that you will find them here. Additionally, our gauges are obtainable in a wide range of sizes and styles. Start your wholesale mud pump pressure gauges search with confidence here!

Crown Oilfield Instrumentation’s mud pressure gauges are extremely accurate and widely used in the harshest drilling environments. Each of our mud pressure systems are designed to meet or exceed API specifications, and you can count on a Crown mud pump pressure gauges to stand up to whatever the oil and gas industry can throw at them.  Our mud pressure systems monitor the pump pressure for a variety of pumps and applications to ensure that you are getting the most out of your drilling fluids. Our single pointer systems use a 6" aluminum cast gauge to detect the slightest pressure changes and come with three different sensors: diaphragm gauge protector, 1:1 piston separator and 4:1 debooster gauge protector. The  Crown compound pointer system uses  unique pointer design that affords the reader to see the smallest pressure changes at a glance. Crown"s unitized pressure gauges are gauge and protector in one and can be mounted on a standpipe and seen up to 60 ft. away. Crown’s pressure gauges are designed, developed and tested to be durable, reliable and dependable, and all systems can stand up to the rigors of the oilfield. Manufactured in the US, you can depend on our pressure gauge systems to provide years of service.

Mud pressure gauges are extremely accurate pressure measuring devices, designed to operate in harsh working environments. Mud pressure gauges operates even at a high temperature of 120°C and a vibration range up to 15 Hz. They are mostly used in the drilling, mining, petroleum and chemical industries. The mud pressure gauge are used for the measurement of static mud pressure.

Mud pressure gauges are of critical importance to the drilling process. They allow the driller to observe the pressure while drilling on land or offshore drilling rigs. At the time of drilling, it is the pressure that indicates the problems downhole, such as if the pressure is too low, it may indicate worn pump packing or liners, broken drill strings or loose joints, washed-out pipe orbit nozzles or lost returns due to formation breakdown and if the pressure is too high, it may indicate an increase in mud density or viscosity or a plugged drill bit.

Reliable pressure information from mud pressure gauges provides an early warning of the upcoming problems, enabling the driller to make corrections and thus avoid major problems.

Mud pressure gauges can withstand high vibration and high-pressure pulsations. The built-in dampening in mud pressure gauges minimizes the gauge fluctuations and their liquid-filled gauge arrangement minimizes vibration and wear to gauge movement so that even minor pressures can be seen and recorded accurately.

The demand for mud pressure gauges is influenced by various factors such as the energy necessity across the globe, especially in developing countries such as China, Brazil and India. The energy demand in these countries is constantly rising, owing to the improving standard of living among the general population. Natural gas and crude oil are essential to the energy supply chain and play a critical role in the overall economic development of a region.

In recent years, several developing nations have been stepping towards self-reliability in oil and gas by investing in the development of new onshore as well as offshore oil reserves, which is boosting the mud pressure gauges market. Moreover, oil and gas refineries are increasing their production capacities to cater to the growing demand. This increased demand and production capacity is surging the demand for mud pressure gauges.

On the other hand, the unpredictability of the oil and gas industry and tumbling global crude oil prices have led to a reduction in exploration, drilling and production activities. Hence, these factors can hamper the growth of the global mud pressure gauges market over the forecast period.

North America is the largest market for mud pressure gauges, followed by the Asia Pacific and the Middle East. The market for mud pressure gauges in North America is expected to register a high growth rate, owing to the recent development of oil sands, shale assets and then Gulf of Mexico"s deep-water resources in this region.

The Middle East region is also a major market for mud pressure gauges, where the market is exhibiting significant growth, owing to the increase production capacity of oil and gas processing plants in this region. The mud pressure gauges market is growing at a moderate rate in Asia Pacific, mainly owing to increased production capacity in China and India. The rest of the world is estimated to account for a relatively small share of the mud pressure gauges market.

With advanced microprocessor technology and high-tech silicon pressure sensors, SPMK700 digital pressure gauge provides an accurate ,reliable and economic solution for wide range of pressure applications. Each silicon pressure sensor in gauges has been specially tested and screened before assembly

We always believe that one"s character decides products" quality, the details decides products" high-quality ,together with the REALISTIC,EFFICIENT AND INNOVATIVE crew spirit for SPMK223 Pressure Calibrator , Multifunction Process Calibrator , Digital Pressure Gauge 0-100 Psi , Welcome any of one"s inquiries and concerns for our items, we glance forward to creating a long-term business enterprise marriage along with you while in the around long run. call us today.

Are you looking for the best Mud Pressure Gauge importers and buyers? ExportHub has you covered. As a leading online B2B portal, we have ensured that you find the latest buy offers. With our help, you’ll never have to worry about getting your hands on your next order. Once you sign up and become our B2B member, you can connect with leading Mud Pressure Gauge buyers and importers to experience.

At Alibaba.com, you will find wholesale parts for pressure gauge available with fast shipping options at affordable prices. We have various pressure gauges available in different designs, and for large range measurements, along with those for smaller measuring ranges.

Completing our product range in pressure gauges are tire pressure gauges, tire gauges, oil pressure gauges, fuel pressure gauges, water pressure gauges, digital tire pressure gauges, vacuum gauges, air pressure gauges, and more. Benefit from quality pressure gauges, now directly from our wholesalers. A pressure gauge has a variety of applications for the measurement of pressures in both industrial and commercial settings. Precisely, our commercial pressure gauges can be used for various types of operations requiring resistance to harsh conditions, including corrosion and exposure to vibrations.

Typically, these gauges are useful in many different industrial sectors, such as brewing, food and beverage processing, refining petrochemicals, oil and gas processing, hydraulic oil pressure gauge manufacturing. It doesn"t matter if you need an air gauge, Magnehelic gauge, digital gauge, oil gauge, digital tire gauge, digital air pressure gauge, digital pressure gauge, tire air pressure gauge, or any other related pressure gauges, there is a high chance that you will find them here. Additionally, our gauges are obtainable in a wide range of sizes and styles. Start your wholesale parts for pressure gauge search with confidence here!

We Would Like To Introduce Ourselves As An India"s Leading Manufacturer Of Pressure Gauges, Temperature Gauges, Accessories And Testing Equipments In India.. We Have Been In This Field For The Last 15 Years And Our Products (Under "LA" brand) Enjoy Good Reputation In Indian Industry. Our Customers Include

We Have Proud To Say That We Are The Pioneers In India To Introduce Many Pressure Gauges For Food, Pharmaceuticals, And Chemical Industries,(Like Rigid Stem Type Homogenizer, Homogenizer With Distance Capillary, Sanitary Pressure Gauge, Mud Gauges For Mud Pump Use In Oil Sector, And Special Diaphragm Gauges) As Totally Indigenous. And All Our Products Enjoy A Good Reputation In The Indian Market.

Being An Indigenous Manufacture We Assure You, We Can Give The Best Sales After Service, We Are Confident Of Supplying Quality Gauges In Most Competitive Rates.

An innovative product policy and continuous advancement of essential design features make this pump a powerful, yet economical standard unit with a broad range of applications.

Professional China Mud Pump - BNS series Single Stage, End Suction Norm Centrifugal pumps – Beken, The product will supply to all over the world, such as: , , ,

Pumps tend to be one of the biggest energy consumers in industrial operations. Pump motors, specifically, require a lot of energy. For instance, a 2500 HP triplex pump used for frac jobs can consume almost 2000 kW of power, meaning a full day of fracking can cost several thousand dollars in energy costs alone!

So, naturally, operators should want to maximize energy efficiency to get the most for their money. Even a 1% improvement in efficiency can decrease annual pumping costs by tens of thousands of dollars. The payoff is worth the effort. And if you want to remotely control your pumps, you want to keep efficiency in mind.

In this post, we’ll point you in the right direction and discuss all things related to pump efficiency. We’ll conclude with several tips for how you can maintain pumping efficiency and keep your energy costs down as much as possible.

In simple terms, pump efficiency refers to the ratio of power out to power in. It’s the mechanical power input at the pump shaft, measured in horsepower (HP), compared to the hydraulic power of the liquid output, also measured in HP. For instance, if a pump requires 1000 HP to operate and produces 800 HP of hydraulic power, it would have an efficiency of 80%.

Remember: pumps have to be driven by something, i.e., an electric or diesel motor. True pump system efficiency needs to factor in the efficiency of both the motor AND the pump.

Consequently, we need to think about how electrical power (when using electric motors) or heat power (when using combustion engines) converts into liquid power to really understand pump efficiency.

Good pump efficiency depends, of course, on pump type and size. High-quality pumps that are well-maintained can achieve efficiencies of 90% or higher, while smaller pumps tend to be less efficient. In general, if you take good care of your pumps, you should be able to achieve 70-90% pump efficiency.

Now that we have a better understanding of the pump efficiency metric, let’s talk about how to calculate it. The mechanical power of the pump, or the input power, is a property of the pump itself and will be documented during the pump setup. The output power, or hydraulic power, is calculated as the liquid flow rate multiplied by the "total head" of the system.

IMPORTANT: to calculate true head, you also need to factor in the work the pump does to move fluid from the source. For example, if the source water is below the pump, you need to account for the extra work the pump puts in to draw source water upwards.

*Note - this calculation assumes the pump inlet is not pressurized and that friction losses are minimal. If the pump experiences a non-zero suction pressure, or if there is significant friction caused by the distance or material of the pipe, these should be factored in as well.

Every foot of water creates an additional 0.434 PSI of pressure, so we"ll find the elevation head by converting the change in elevation in feet to the suction pressure created by the water.

You"ll notice that the elevation head is minimal compared to the discharge pressure, and has minimal effect on the efficiency of the pump. As the elevation change increases or the discharge pressure decreases, however, elevation change will have a greater impact on total head.

Obviously, that’s a fair amount of math to get at the pump efficiency, considering all of the units conversions that need to be done. To avoid doing these calculations manually, feel free to use our simple pump efficiency calculator.

Our calculations use static variables (pump-rated horsepower and water source elevation) and dynamic variables (discharge flow and pressure). To determine pump efficiency, we need to measure the static variables only once, unless they change.

If you want to measure the true efficiency of your pump, taking energy consumption into account, you could add an electrical meter. Your meter should consist of a current transducer and voltage monitor (if using DC) for electrical motors or a fuel gauge for combustion. This would give you a true understanding of how pump efficiency affects energy consumption, and ultimately your bank account.

Up until this point, we’ve covered the ins and outs of how to determine pump efficiency. We’re now ready for the exciting stuff - how to improve pump efficiency!

One of the easiest ways to improve pump efficiency is to actually monitor pumps for signs of efficiency loss! If you monitor flow rate and discharge (output power) along with motor current or fuel consumption, you’ll notice efficiency losses as soon as they occur. Simply having pump efficiency information on hand empowers you to take action.

Another way to increase efficiency is to keep pumps well-maintained. Efficiency losses mostly come from mechanical defects in pumps, e.g., friction, leakages, and component failures. You can mitigate these issues through regular maintenance that keeps parts in working order and reveals impending failures. Of course, if you are continuously monitoring your pumps for efficiency drops, you’ll know exactly when maintenance is due.

You can also improve pump efficiency by keeping pumps lubricated at all times. Lubrication is the enemy of friction, which is the enemy of efficiency (“the enemy of my enemy is my friend…”).

A fourth way to enhance pump efficiency is to ensure your pumps and piping are sized properly for your infrastructure. Although we’re bringing this up last, it’s really the first step in any pumping operation. If your pumps and piping don’t match, no amount of lubricant or maintenance will help.

Pipes have physical limits to how much fluid they can move at a particular pressure. If pipes aren’t sized properly, you’ll lose efficiency because your motor will have to work harder. It’s like air conditioning - if your ductwork isn’t sized appropriately for your home, you’ll end up paying more on your energy bill.

In this post, we’ve given you the full rundown when it comes to calculating and improving pump efficiency. You can now calculate, measure, and improve pump efficiency, potentially saving your business thousands of dollars annually on energy costs.

For those just getting started with pump optimization, we offer purpose-built, prepackaged solutions that will have you monitoring pump efficiency in minutes, even in hazardous environments.

OILFIELD INSTRUMENTS PRESSURE INDICATING SYSTEM DRILLING INSTRUMENTATION ...Quality is Everything... Contact Rigchina Group Company for more information on our complete line of Oilfield Instruments, drilling fluids testing equipment and instrumentation for oil and gas industry. Call us today, or visit our website at www.rigchina.com © Copyright 1996-2016 Rigchina Group Company All rights reserved. Tel: 0086-579-87537698(switchboard) Fax: 0086-579-8753 696 Rev.2015 URL: http://www.rigchina.com Email: sales@rigchina.com SKYPE:RIGCHINA Add: No.80-82, Qiude Rd, West Cheng Industrial Estate, Yongkang city Zhejiang Province, China 321300

OILFIELD INSTRUMENTS PRESSURE INDICATING SYSTEM 1 MUD PUMP PRESSURE GAUGES Rugged standpipe-type gauges provide dependable, accurate pressure readings RIGCHINA Stand Pipe Gauges provide a quick, accurate display of pump pressure. Main applications are for standpipes and to be mounted on mud pumps. This style of gauge has been in service for many years and has proven to be a tough, dependable and reliable way to monitor pump pressure. Interchangeable with Cameron type gauges Temerature range -20 to 250(-29 to 121) 3 gauge models offering a multitude of sizes,pressure ranges and sub end...

OILFIELD INSTRUMENTS FEATURES: Diameter: 4-7/8"(124 mm), Height: 10-1/16" (256 mm) Pressure range: 7MPa, 14MPa, 21MPa, 25MPa, 35MPa, 40MPa, 60MPa, 80MPa, 100MPa, 120Mpa,160MPa 1,000 PSI, 1500PSI 3,000 PSI. 5,000 PSI, 6,000 PSI, 10,000 PSI, 15,000 PSI and 20,000PSI 70 Bar, 140 Bar, 210 Bar, 350Bar, 420 Bar, 700Bar, 1,040 Bar and 1,400 Bar Temperature range: -50°F to 180°F Liquid surrounding gauge mechanism minimizes wear from vibration and mechanical shock Heavy duty seals create watertight barrier around gauge mechanism Combination threaded male 2" line pipe and threaded female 1" line pipe...

OILFIELD INSTRUMENTS TYPE D PRESSURE GAUGE (MODEL 7) Model D Gauge for capacities up to 6,000 PSI FEATURES: Standard capacities of: 1,000 p.s.i., 3,000 p.s.i. 5,000 p.s.i and 6,000 p.s.i. 70 Bar, 210 Bar 350 and 420 Bar * 2" Nutted version available Tel: 0086-579-87537698(switchboard) Fax: 0086-579-8753 696 Rev.2015 URL: http://www.rigchina.com Email: sales@rigchina.com SKYPE:RIGCHINA Add: No.80-82, Qiude Rd, West Cheng Industrial Estate, Yongkang city Zhejiang Province, China 321300

OILFIELD INSTRUMENTS Temperature range: -50°F to 180°F Liquid surrounding gauge mechanism minimizes wear from vibration and mechanical shock Heavy duty seals create watertight barrier around gauge mechanism Impact resistant, clear polymer lens Connects with threaded female 2" line pipe TYPE E PRESSURE GAUGE (MODEL 8) Model 8 Gauge for capacities up to 20,000 PSI Tel: 0086-579-87537698(switchboard) Fax: 0086-579-8753 696 Rev.2015 URL: http://www.rigchina.com Email: sales@rigchina.com SKYPE:RIGCHINA Add: No.80-82, Qiude Rd, West Cheng Industrial Estate, Yongkang city Zhejiang Province, China...

OILFIELD INSTRUMENTS Liquid surrounding gauge mechanism minimizes wear from vibration and mechanical shock Heavy duty seals create watertight barrier around gauge mechanism Impact resistant, clear polymer lens Dial sizes: 8-1/8" (206 mm) dials Tel: 0086-579-87537698(switchboard) Fax: 0086-579-8753 696 Rev.2015 URL: http://www.rigchina.com Email: sales@rigchina.com SKYPE:RIGCHINA Add: No.80-82, Qiude Rd, West Cheng Industrial Estate, Yongkang city Zhejiang Province, China 321300

OILFIELD INSTRUMENTS FEATURES: Standard capacities of: 7MPa,14MPa,21MPa,25MPa,35MPa,40MPa,60MPa,80MPa,100MPa,120MPa and 160MPa 1,000 PSI, 1500PSI 3,000 PSI. 5,000 PSI, 6,000 PSI, 10,000 PSI,15,000 PSI and 20,000PSI 70 Bar, 140 Bar, 210 Bar, 350Bar, 420 Bar, 700Bar,1,040 Bar and 1,400 Bar Accuracy: ± 1.6% of full range Threaded:2” LPT male with 1” LPT female Temperature range: -50°F to 180°F TYPE RC-100 PRESSURE GAUGE Model RC-100 Gauge for capacities up to 20,000 PSI Tel: 0086-579-87537698(switchboard) Fax: 0086-579-8753 696 Rev.2015 URL: http://www.rigchina.com Email: sales@rigchina.com...

OILFIELD INSTRUMENTS FEATURES: Standard capacities of: 7MPa,14MPa,21MPa,25MPa,35MPa,40MPa,60MPa,80MPa,100MPa,120MPa and 160MPa 1,000 PSI, 1500PSI 3,000 PSI. 5,000 PSI, 6,000 PSI, 10,000 PSI,15,000 PSI and 20,000PSI 70 Bar, 140 Bar, 210 Bar, 350Bar, 420 Bar, 700Bar,1,040 Bar and 1,400 Bar Dial sizes: 124 mm dials Accuracy: ± 1.6% of full range Threaded:2” LPT male with 1” LPT female or 2” LPT female Temperature range: -50°F to 180°F Liquid surrounding gauge mechanism minimizes wear from vibration and mechanical shock Heavy duty seals create watertight barrier around gauge mechanism Impact...

OILFIELD INSTRUMENTS Liquid surrounding gauge mechanism minimizes wear from vibration and mechanical shock Heavy duty seals create watertight barrier around gauge mechanism Impact resistant, clear polymer lens Main Technical Specification Part-No. Description &Technical Parameters Dial sizes: 4-7/8" (123 mm) dials Accuracy: ± 1.6% of full range Pressure Range: 7MPa,14MPa,21MPa,25MPa,35MPa,40MPa,60MPa,80MPa, 100MPa,120MPa and 160MPa 1,000 PSI,1500PSI 3,000 PSI. 5,000 PSI, 6,000 PSI, 10,000 PSI,15,000 PSI and 20,000PSI 70 Bar, 140 Bar, 210 Bar, 350Bar, 420 Bar, 700Bar, 1,040 Bar and 1,400 Bar...

OILFIELD INSTRUMENTS Dial sizes: 8-1/8" (206 mm) dials Accuracy: ± 1.6% of full range Threaded:FLANGE,1.81,RJ,BX-151 FLANGE,2.06,RJ,R-24 FLANGE,2.06,RJ,BX-152 FLANGE,3.12,RJ,R-35 Pressure Range: 7MPa,14MPa,21MPa,25MPa,35MPa,40MPa,60MPa,80MPa, 100MPa,120MPa and 160MPa 1,000 PSI, 1500PSI 3,000 PSI. 5,000 PSI, 6,000 PSI, 10,000 PSI,15,000 PSI and 20,000PSI 70 Bar, 140 Bar, 210 Bar, 350Bar, 420 Bar, 700Bar, 1,040 Bar and 1,400 Bar Size: 6.5" × 6" × 10.2" (16.5 × 15 × 26 cm) ,Weight: 35lb (16 kg) Dial sizes:3.94" (100 mm) dials Accuracy: ± 1.6% of full range Pressure Range:...

OILFIELD INSTRUMENTS 2 PRESSURE INDICATING SYSTEM RIGCHINA’s PRESSURE gauges provide quick, accurate readings of your rigs. 2.1 E-17 DIAPHRAGM PROTECTOR 1:1 Piston Protects measuring or recording device from working fluid while transmitting no-lag, linear pressure signal. Rugged workhorse sensor found in every corner of the world doing every conceivable pressure sensing job. Robust, time proven design allows easy field repair and maintenance. Available in flanged, threaded, and weld on female sub configurations. Certified models available E-17 Diaphragm Protector. The Debooster is a stepped...

Commonly used expressions for the present apparatus is a mud saver valve or automatic kelly valve. The automatic kelly valve, such as herein disclosed, is attached at the bottom of a drilling kelly and is a specialized tool with versatile characteristics. The valve is designed essentially to eliminate the loss of costly drilling fluids as is lost from the drilling kelly each time the kelly is connected to the drillpipe as the drillpipe is being added into the well by section during drilling operations. This automatic kelly valve automatically closes and retains the drilling fluid in the drilling kelly each time the kelly is disconnected from the drillpipe. The automatic kelly valve is spring loaded as a check valve and opens only when the pump pressure of the mud pumps becomes greater than the weight of the drilling fluid retained in the kelly. This prevents costly fluid loss and a hazardous muddy rig floor when the drilling crew are making connection or disconnection of the drillpipe.

At times, particularly when the drillpipe is being added into the well bore, an earth formation down within the well bore may have pressure exceeding the weight of the drilling fluid in the drill bore and the well is inclined to "kick" with pressure coming into the well from the well formation. This particular phenomena is aggravated with the sudden loss of fluid pressure as the mud pumps are stopped when a section of drillpipe is being added.

An advantage of the automatic kelly valve is that it has a tool port plug in the check valve body which may be removed when desired and" the oil well tool such as a point indicator or backoff shot device can be lowered through the kelly valve for performance down within or below the drillpipe. In the present invention a pressure gauge may be installed into a special test valve body provided below the automatic valve to test the pressure inside the drillpipe before the drillpipe connection is broken and also to sample the contents within the drillpipe as containing mud only or possibly gas along with the mud.

The prior art is generally represented in FIG. 1 of the patent drawing. As shown, a closure apparatus or automatic kelly valve is connected between a drillpipe and a drilling kelly. The kelly is connected further into a swivel assembly including a swivel, bail and rotary hose. The assembly is further connected through piping to a mud pump (not shown).

Drilling fluids are pumped through the kelly, the closure apparatus and the drill string into a drill bit located at the bottom of the well bore. It is noted that hydraulic pressure is applied through the kelly and the drilling mud acts on the closure member to move the valve out of its valve seat. Pressure in the drill pipe operates to close the closure member off until such time as pressure within the kelly is sufficient to overcome the check valve spring in the closure.

When the drillpipe string is disconnected from the closure apparatus for any purpose, the mud pumping apparatus is shut off. The resilient spring of the valve in the closure comes into contact to seal the passage means through the kelly and the closing of the apparatus maintains a standing column of drilling fluid in the kelly above the closure apparatus. The retention of the drilling fluid in the kelly reduces waste of expensive drilling fluids and, even more especially, reduces the dangers inherent with a slippery and wet drilling platform to the drilling crew.

As will occasionally happen without forewarning, the drill may penetrate a reservoir under high pressure and gas and oil or a mixture of both, will tend to overcome the present pressure of column of drilling fluids standing in the drillpipe string. On such an occurrence, the reservoir pressure tends to force the drilling fluids back through the closure apparatus and through the kelly into the mud pumping apparatus. The closure apparatus operates to hold the drilling muds under any blowout pressure in the drillpipe string. The higher pressure acting on the closure valve urges the valve more firmly into contact with its seat.

Another object of the present invention is to provide means to sample the fluids in the drillpipe and determine not only the pressure of such fluids but also the constituency of such fluids as being gas or oil.

Another object of the present invention is to vent the pressure in the drillpipe, on a sample basis, to determine if the pressure will drop off a short blow down period.

The foregoing and other objects and advantages of the invention are attained by a closure valve apparatus having a pressure test device and adapted for threaded connection between a drilling kelly and a drillpipe. The apparatus includes a tubular upper body having a valve seat, a tubular lower body threadedly connected to the upper body, a closure check valve moveably mounted in spring loaded relation within the lower body to be normally seated in closed relation against the valve seat and to permit flow of fluids under pressure only from the kelly into the drillpipe. A pressure test device is connected into a side port formed in the lower body between the valve seat and the drillpipe. The pressure test device includes a generally cylindrical test valve body threaded in sealed relation into the side port of the lower body with the test valve body having an exterior stop flange disposed in an exterior counter bore formed in the side port. A test bore and a test counter bore is axially formed through the test valve body. A spring retainer sleeve is threaded into connection into the test counter bore. A check test valve is urged by a spring into closed position against a test valve seat formed between the test bore and the test counter bore. The spring is disposed in compression between the test check valve and the retainer sleeve. A test probe body having a probe nose is adapted to push the test valve away from the test valve seat as the probe body is threaded into connection within the test bore. The test probe member has a fluid pressure passageway extending from the probe nose to a pressure gauge connected to the probe member outside the lower body. The test probe member is adapted to transmit fluid pressure from the lower body past he test valve to the pressure gauge. The test probe member is adapted to transmit fluid pressure from the lower body to the pressure gauge when threaded into the test bore a distance sufficient to push the valve member away from the test valve seat. The test check valve may be a ball type valve. The test bore may be closed by a threaded plug until the test probe body is threaded into the test bore. A manual sample flow valve may be connected into the test probe body and the fluid pressure passageway to sample whatever may be within the drillpipe and also to permit blowdown of pressure within the drillpipe if desired. The closure check valve and the closure member may be axially formed with a tool port normally closed off by a tool port plug. This closure is adapted to pass a down hole tool into the drillpipe after removal of the test port plug.

As known, a large volume of abrasive drilling fluids are pumped through closure valve 10 during drilling operations. Consequently all the parts exposed to the drilling fluids are provided of erosion resistant materials and alloys.

FIG. 4 illustrates the test valve body assembly 50 as described with reference to FIG. 3 and additionally shows a test probe device 64 which is threaded into the test bore 52. The test probe 64 includes a probe nose 66 which(extends into the test bore 52 to displace the valve element 58 away from its seat 56 and permit passage of fluid pressure from inside the lower body 24 through passageway 68 formed in the test probe 64 into a pressure gauge 72. The passageway 68 is shown to be divided near the probe nose 66. This divided passageway feature is optional so long as the passageway 68 has free access to the counter bore 54 when the probe nose 66 has pushed the valve element 58 off the seat 56. The test probe 64 includes a section 70 which has wrench flats to facilitate the threaded connection of the test probe 64 into and out of the test bore 52.

The pressure gauge 72 is provided in pressure range to indicate the highest pressure expected to be encountered. For example, if pressures up to 2,000 psi are expected the gauge range provided would be up to about 3,000 psi. Also, to protect the gauge against high pressure pump pulsations, the gauge will be internally equipped with a conventional pulsation damper or snubber (not shown).

As an optional feature, the test probe 64 may include a sample valve 80, shown in dashed lines, which is connected into the probe 64 and into the flow passages 68 so that valve 80 can be opened to permit fluid under pressure from the lower body 24 to escape in the atmosphere. This sample valve 80 would indicate whether the fluids in the drillpipe 12 is drilling fluid, oil, gas, or mixtures entrained in the drilling fluid. Also if pressure has accumulated in the upper end of the drillpipe 12, such pressure may be blown down through the valve 80 as might be desirable.

The test probe 64 and pressure gauge assembly may be inserted into the bore 52 at the outset and carried along with the closure valve 10 during normal drilling operations.

In the event the operating environment might cause damage to the test probe 64 and gauge 72 during the regular drilling operation, the valve body 50 may include only the temporary closure plug 78 until such time that it is needed to ascertain the fluid pressure in the drill pipe 12. At this time the test probe 64 may replace the closure plug 78 and be threaded into the bore 52 a distance sufficient to move the valve element 58 out of the valve seat 56 and thereby give communication of the fluids pressure within the body 24 and drillpipe 12 out to the pressure gauge 72. As seen, an O-ring on the probe nose 66 provides a seal until the threaded connection is completed.

If excessive pressure is found in the drillpipe 12, it might be hazardous to disconnect the closure valve 10 from the drillpipe 12. In the event the sample valve 80 is used with the test probe 64, the valve 80 might be opened for a short time to see if the pressure in drillpipe 12 will blow down to a safe level in a short time. Otherwise, it may be desirable to pump additional drilling fluid into the drill pipe 12 to increase the hydrostatic mud weight in the drillpipe 12 and thereby prevent any blowout of fluids from the drillpipe 12.

In any event, the pressure gauge 72, when installed as shown and described will give an indication of the pressure in drillpipe 12 and the possibility of hazardous conditions and remedial steps to be taken.

It is seen that the closure valve 10 may be used with much more confidence when the operator knows of the pressure within the drillpipe 12 before the closure valve 10 is disconnected.