A multifunctional sampler for oil field

Abstract

The present application relates to oil field sampling technology field, concretely relates to a kind of multifunctional sampler for oil field, it is constituted by upper half and lower half integral;Upper half includes umbrella-shaped step sliding sleeve lower end cooperation installation switch control rod, the switch control rod can be installed in upper outer cylinder and lower outer cylinder up and down, the upper outer cylinder is provided with the upper return spring of cooperation switch control rod, the lower outer cylinder is provided with liquid inlet groove and locking block;Lower half includes sampler outer cylinder upper end and lower end are respectively equipped with upper joint and lower joint.The present application not only has inertia closing, hammering closing, impact closing three closing modes, but also can help operator to judge whether sampler is closed on ground, improve the reliability of sampler when using in different categories of well to obtain sample, and avoid repeated construction, reduce construction time, reduce production cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil field sampling, in particular to a multifunctional sampler for oil field. BACKGROUND

[0002] The information disclosed in the background of the present application is only intended to increase the understanding of the overall background of the present application, and should not be necessarily regarded as acknowledging or implying in any form that the information constitutes prior art known to those skilled in the art.

[0003] When sampling ordinary oil-water wells and super-high-temperature steam injection wells, the sampler is suspended by a steel wire cable on a winch and lowered to a predetermined position in the well to obtain a downhole liquid sample. Currently used samplers mainly include hammering type, clock control type, electronic type, lifting and hanging type, release of bullet gas push type, and bumping type. These control methods have certain drawbacks.

[0004] Hammering type: using a heavy hammer inside the blowout plug on the wellhead blowout device, sliding down along the steel wire cable connected to the sampler to the top of the sampler, and hitting the controller to close the sampler cylinder. It can be applied to ordinary oil-water wells and high-temperature steam injection wells to obtain samples at any depth. The disadvantage is that the operator cannot determine whether the cylinder is closed on the ground.

[0005] Clock control type: using a mechanical clock inside the sampler to control the closure of the sampler cylinder. It can be applied to ordinary oil-water wells to obtain samples at any depth. The disadvantage is that it is not suitable for high-temperature steam injection well sampling, and the operator cannot determine whether the cylinder is closed on the ground.

[0006] Electronic type: using an electronic clock inside the sampler to control the motor to close the sampler cylinder. It can be applied to ordinary oil-water wells to obtain samples at any depth. The disadvantage is that it is not suitable for high-temperature steam injection well sampling, and the operator cannot determine whether the cylinder is closed on the ground.

[0007] Lifting and hanging type: using a cam on the upper part of the sampler and a one-way tongue block on the cam. When the sampler is lowered to the sampling position, the sampler is lifted, and when the one-way tongue block on the cam is hung in the gap inside the coupling connecting the two pipe columns, the cam rotates to a certain angle, and the sampler cylinder is closed. It can be applied to ordinary oil-water wells and super-high-temperature steam injection wells to obtain samples at any depth. The disadvantage is that the operator cannot determine whether the cylinder is closed on the ground.

[0008] Release of bullet gas push type: using electronic clock to control the gas generated by the explosion of an electric detonator to push the sampler cylinder to close. It can be applied to ordinary oil-water wells to obtain samples at any depth. The disadvantage is that it is not suitable for high-temperature steam injection well sampling, and the operator cannot determine whether the cylinder is closed on the ground.

[0009] Punching: the way of using the lower part of the sampler to make the sampler sample cylinder close by the well bottom tool, which can be applied to ordinary oil and water wells, the disadvantage is: only the bottom sample can be obtained, the sample at any depth cannot be obtained, it is not suitable for sampling in high temperature steam injection wells, and the operator cannot determine whether the sample cylinder is closed on the ground.

[0010] The above control mode of the sampler has single function, is affected by high temperature, and is not suitable for sampling dryness in super high temperature steam injection wells except for hammering and lifting control modes.

[0011] At present, the security department prohibits the operator from climbing the wellhead blowout preventer to release the weight and operate, and the self-lifting blowout preventer must be used. The blowout preventer needs to put the sampler into the pipe in the horizontal state of the blowout preventer, and then the hydraulic lifting is erected. In this way, the sampler will move up and down in the blowout preventer, touch the controller, cause the sample cylinder to close, and must be re-adjusted and repeatedly installed. Its reliability is poor, and the operator cannot judge whether the sample cylinder of the sampler is closed on the ground. Only when the sampler is pulled out of the wellhead can it be known whether it is closed or not. If the sample cylinder is not closed in the well, there is no remedial measure, which will cause repeated construction and affect oilfield production.

[0012] In addition, the prior art has the following patents:

[0013] CN110513108A, an oilfield downhole sampler, through the connection bolt, cable and servo motor, a plurality of devices can be connected together through the connection bolt and connection hole, the servo motor is used to stretch the cable to make the device located at different depths in the oil field, and then the crude oil at different depths is sampled, so that the device is repeatedly deepened into the oil field at different depths for sampling.

[0014] CN114778206A, an oilfield sampler applied to oilfield exploration, through the filter screen structure on the side of the filter cover, the drilling fluid collected by the sampling bucket can be filtered to a certain extent, avoiding the blocking phenomenon of the inlet joint, and the first plug body, the second plug body and the third plug body are used to make the sampling bucket complete the sampling operation of the drilling fluid at the upper, middle and lower three layers in one diving process.

[0015] CN114961718A, an oilfield downhole sampler with good sealing, comprising a shell, the inside of the shell is divided into a power cavity, a second collecting cavity, a sliding cavity and a first collecting cavity by a first partition, a second partition and a third partition, a transmission mechanism for providing power for collecting samples is arranged in the sliding cavity, a second piston slides in a connecting hole, the air pressure of the first collecting cavity is reduced, the external oilfield sample enters the first collecting cavity, the rubber ball is reset, preventing the oilfield sample in the first collecting cavity from leaking out, after the first feed pipe corresponds to the position of the strip-shaped hole, the external oilfield sample enters the second collecting cavity, after the position of the second feed pipe corresponds to the second feed hole, the control valve is adjusted, so that the oilfield sample enters the third collecting cavity, so that the oilfield downhole sampler can perform three oilfield sampling operations after one trip downhole, thereby improving the sampling efficiency and reducing the oilfield sample leakage. SUMMARY

[0016] To solve the above technical problems, the present application provides a multifunctional sampler for oilfields, which not only has three closing modes of inertia closing, hammer closing and impact closing, but also can help operators to determine whether the sampler is closed on the ground, thereby improving the reliability of the sampler in obtaining samples from different types of wells.

[0017] To achieve the above purpose, the technical scheme adopted by the present application is:

[0018] A multifunctional sampler for oilfields, which is composed of an upper half and a lower half;

[0019] The upper half includes a switch control rod matched and installed at the lower end of the umbrella-shaped step sliding sleeve, the switch control rod is movably installed in the upper outer cylinder and the lower outer cylinder, the upper outer cylinder is provided with an upper return spring matched with the switch control rod, and the lower outer cylinder is provided with a liquid inlet groove and a locking block;

[0020] The lower half includes an upper joint and a lower joint respectively installed at the upper end and the lower end of the sampler outer cylinder, the lower end of the upper joint is provided with a first valve matched in the sampler outer cylinder, an adjustable control sleeve is arranged above the first valve, and a sampler inner cylinder is arranged below the first valve, the sampler inner cylinder is provided with a center transmission control link matched with the first valve; the upper end of the lower joint is internally provided with a second valve, and the lower end is connected with a liquid inlet joint;

[0021] The locking block is associated with the switch control rod and the adjustable control sleeve to cooperatively realize the opening and closing of the sampler.

[0022] Further, the upper half and the lower half are connected through the lower outer cylinder and the upper joint.

[0023] The top end of the umbrella-shaped stepped sliding sleeve is provided with a steel wire penetrating hole, the umbrella-shaped stepped sliding sleeve is sequentially provided with a supporting spring and a non-removable rope cap, the non-removable rope cap body is provided with a transversely penetrating rope knot hole, the top end of the non-removable rope cap body is provided with a longitudinal groove to the rope knot hole, the switch control rod is installed at the lower part of the non-removable rope cap, the switch control rod is provided with a connecting wire sleeve and is connected with the lower end of the umbrella-shaped stepped sliding sleeve, the switch control rod is provided with a return spring, the upper part of the return spring is provided with a positioning pin fixed on the outer surface of the switch control rod, and the upper end of the upper outer cylinder is provided with a pressing cap with a longitudinal key groove.

[0024] Further, the lower part of the outer cylinder is internally threaded, and the middle part of the lower part of the outer cylinder is symmetrically provided with a locking block movable slot matched with the locking block on both sides;

[0025] The upper part of the locking block is provided with a cutting surface matched with the switch control rod and a locking block mounting hole fixed by a cooperation pin, the middle part is provided with a spring positioning hole and a spring fixing hole matched with the installation of the release spring, and the lower part is provided with an outer positioning claw and a lock head which can be converged.

[0026] Further, the lower part of the first valve is provided with a flared mouth sleeve, the upper part of the flared mouth sleeve body is provided with a rotatable first spiral impeller, the first valve is conical, the conical part is provided with a first sealing ring, the upper part of the first valve is provided with a first adjusting screw, the first adjusting screw is sequentially provided with an upper joint, a first return spring, a first return spring adjusting nut and an adjustable control sleeve, and the first valve has a gap for fluid to pass between the first return spring and the upper joint under the compression of the first return spring.

[0027] Further, the center of the upper joint is a through hole, the lower end of the upper joint is internally provided with a conical sealing surface matched with the conical surface of the first valve, and the lower part of the upper joint is sequentially provided with a sampler outer cylinder, a lower joint and a liquid inlet joint.

[0028] Further, the sampler outer cylinder is provided with a locking base, the locking base body is provided with external threads for connecting the inner wall of the sampler outer cylinder and the sampling inner cylinder, the center of the locking base body is provided with a threaded hole penetrating through, and the upper end of the threaded hole is provided with a locking sleeve provided with multiple longitudinal cutting seams.

[0029] Further, the sampling inner cylinder is provided with a central pipe through which a central transmission control connecting rod can pass, and a liquid inlet annular cavity is arranged between the central pipe and the inner wall of the sampling inner cylinder.

[0030] A plurality of sample inlet holes penetrating through are arranged around the threaded hole in the center of the locking base body, and the sample inlet holes are communicated with the liquid inlet annular cavity.

[0031] The upper end of the center transmission control connecting rod is in the shape of a date pit, and the center transmission control connecting rod upper end passes through the center tube inside the sampling inner cylinder and is located in the locking sleeve above the locking base.

[0032] Further, the center transmission control connecting rod is sleeved with a second spiral impeller between the second valve, the lower part of the second spiral impeller is a tapered part, the tapered part is provided with a second sealing ring, and the second valve has a gap for fluid passing between the lower joint under the compression of the first return spring.

[0033] Further, the second adjusting screw below the second valve is sequentially provided with a lower joint, the center of the lower joint is a through hole, the inner part of the upper end of the lower joint is provided with a tapered sealing surface matched with the tapered surface of the second valve, a second return spring and a second spring adjusting nut.

[0034] Further, the lower end of the lower joint is connected with a liquid inlet joint, and the liquid inlet joint body is provided with a liquid inlet hole.

[0035] Beneficial effects: the present application has reasonable structure, high sampling success rate, low failure rate, reliable use and the like, avoids repeated construction, reduces construction time and reduces production cost. The present application can be used not only for downhole dryness sampling of superhigh temperature steam injection wells, but also for downhole sampling of ordinary oil-water wells. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a schematic diagram of the upper half structure of the present application;

[0037] Figure 2 is a schematic diagram of the lower half structure of the present application;

[0038] Figure 3 is a schematic diagram of the inner cylinder structure of the present application;

[0039] Figure 4 is a schematic diagram of the external structure of the rope cap part of the present application;

[0040] Figure 5 is a schematic diagram of the internal structure of the rope cap part of the present application;

[0041] Figure 6 is a schematic diagram of the locking block structure of the present application.

[0042] The reference signs in the drawings represent as follows:

[0043] 1 umbrella-shaped stepped sliding sleeve; 2 steel wire passing hole; 3 supporting spring; 4 disassembly-free rope cap; 5 groove; 6 knot hole; 7 connecting wire sleeve; 8 switch control rod; 9 positioning pin; 10 pressure cap with longitudinal key groove; 11 upper outer cylinder; 12 upper return spring; 13 lower outer cylinder; 14 pin; 15 spring fixing hole; 16 release spring; 17 locking block; 17-1 cutting surface; 17-2 locking block mounting hole; 17-3 spring fixing hole; 17-4 outer positioning claw; 17-5 locking head; 18 locking block movable slot; 19 liquid inlet groove; 20 adjustable control sleeve; 21 first return spring adjusting nut; 22 upper joint; 23 first return spring; 24 first adjusting screw; 25 first sealing ring; 26 first valve; 27 first helical impeller; 28 bell mouth sleeve; 29 cutting seam; 30 locking sleeve; 31 upper end of central transmission control connecting rod; 32 locking sleeve mounting hole; 33 sample inlet hole; 34 locking base; 35 inner cylinder of sampler; 35-1 central tube; 35-2 liquid inlet annular cavity; 36 outer cylinder of sampler; 37 central transmission control connecting rod; 38 second helical impeller; 39 second valve; 40 second sealing ring; 41 second return spring; 42 second adjusting screw; 43 lower joint; 44 second spring adjusting nut; 45 liquid inlet joint; 46 liquid inlet hole. DETAILED DESCRIPTION

[0044] In order to further understand the features, technical means and specific purposes and functions achieved by the present application, the present application will be described in further detail below in combination with the drawings and specific embodiments.

[0045] Figures 1 to 6 A multifunctional sampler for oil field is shown, which is composed of an upper half and a lower half;

[0046] The upper half includes an umbrella-shaped stepped sliding sleeve 1 at the lower end of which a switch control rod 8 is fitted and installed, the switch control rod 8 being movably installed in the upper outer cylinder 11 and the lower outer cylinder 13, the upper outer cylinder 11 being provided with an upper return spring 12 fitted with the switch control rod 8, and the lower outer cylinder 13 being provided with a liquid inlet groove 19 and a locking block 17;

[0047] The lower half includes an upper joint 22 and a lower joint 43 installed at the upper end and the lower end of the outer cylinder of the sampler 36 respectively, the lower end of the upper joint 22 being provided with a first valve 26 fitted in the outer cylinder of the sampler 36, the first valve 26 being provided with an adjustable control sleeve 20 above and a sampler inner cylinder 35 below, the sampler inner cylinder 35 being provided with a central transmission control connecting rod 37 fitted with the first valve 26; the upper end of the lower joint 43 being provided with a second valve 39 inside, and the lower end being connected with a liquid inlet joint 45;

[0048] The locking block 17 is associated with the switch control rod 8 and the adjustable control sleeve 20 to cooperate to achieve the opening and closing of the sampler.

[0049] In another preferred embodiment, the upper half and the lower half are connected by the lower outer cylinder 13 and the upper joint 22.

[0050] The top end of the umbrella-shaped stepped sliding sleeve 1 is provided with a downwardly penetrating steel wire hole 2, and a supporting spring 3 and a non-removable rope cap 4 are sequentially installed in the umbrella-shaped stepped sliding sleeve 1, the body of the non-removable rope cap 4 is provided with a transversely penetrating rope knot hole 6, a longitudinal groove 5 is opened from the center of the top end of the body of the non-removable rope cap 4 to the rope knot hole 6, the switch control rod 8 is installed at the lower part of the non-removable rope cap 4, the switch control rod 8 is sleeved with a connecting wire sleeve 7 and connected with the lower end of the umbrella-shaped stepped sliding sleeve 1, a return spring is sleeved outside the switch control rod 8, a positioning pin 9 is arranged above the return spring and fixed outside the switch control rod 8, and a pressure cap 10 with a longitudinal key groove is installed at the upper end of the upper outer cylinder 11.

[0051] In another preferred embodiment, the lower outer cylinder 13 is internally threaded at both ends, and locking block 17 movable slots that cooperate with the locking block 17 are symmetrically opened on both sides of the middle part of the lower outer cylinder 13.

[0052] The upper part of the locking block 17 is provided with a cutting surface 17-1 that cooperates with the switch control rod 8 and a locking block mounting hole 17-2 that cooperates with the hinge-fixed locking pin 14, the middle part is provided with a spring positioning hole 15 and a spring fixing hole 17-3 that cooperate with the installation of the release spring 16, and the lower part is provided with an outer positioning claw 17-4 and a lock head 17-5 that can be converged.

[0053] In another preferred embodiment, the first valve 26 is provided with a lower part of the horn mouth sleeve 28, the body of the horn mouth sleeve 28 is provided with a rotatable first spiral impeller 27 installed at the upper part, the first valve 26 is conical, a first sealing ring 25 is installed at the conical part, the first valve 26 is provided with a first adjusting screw 24 at the upper part, the first adjusting screw 24 is sequentially provided with an upper joint 22, a first return spring 23, a first return spring 23 adjusting nut 21 and an adjustable control sleeve 20, and the first valve 26 has a gap for fluid to pass through between the upper joint 22 under the compression of the first return spring 23.

[0054] In another preferred embodiment, the center of the upper joint 22 is a through hole, the lower end of the upper joint 22 is internally provided with a conical sealing surface that cooperates with the conical surface of the first valve 26, and a sampler outer cylinder 36, a lower joint 43 and a liquid inlet joint 45 are sequentially installed at the lower part of the upper joint 22.

[0055] In another preferred embodiment, the sampler outer cylinder 36 is provided with a locking base 34, the locking base 34 is provided with external threads for connecting the inner wall of the sampler outer cylinder 36 and the sampler inner cylinder, the locking base 34 is provided with a threaded hole in the center of the body, and a locking sleeve 30 provided with multiple longitudinal cutting slots 29 is installed on the upper end of the threaded hole.

[0056] In another preferred embodiment, the sampler inner cylinder is provided with a central tube 35-1 through which the central transmission control link 37 passes, and a liquid inlet annular cavity 35-2 is provided between the central tube 35-1 and the inner wall of the sampler inner cylinder.

[0057] A plurality of sample inlet holes 33 are provided around the threaded hole in the center of the body of the locking base 34, and the sample inlet holes 33 are in communication with the liquid inlet annular cavity 35-2.

[0058] The upper end of the central transmission control link 37 is in the shape of a date pit, and the upper end of the central transmission control link 37 passes through the central tube 35-1 inside the sampler inner cylinder and is located in the locking sleeve 30 above the locking base 34.

[0059] In another preferred embodiment, a second spiral impeller 38 is provided between the central transmission control link 37 and the second valve 39, the lower part of the second valve 39 is a tapered portion, the second sealing ring 40 is installed on the tapered portion, and the second valve 39 has a gap through which fluid can pass between the lower joint 43 under the compression of the first return spring 23.

[0060] In another preferred embodiment, a second adjusting screw 42 is provided below the second valve 39, and a lower joint 43 is installed in sequence, the center of the lower joint 43 is a through hole, the inner upper end of the lower joint 43 is provided with a tapered sealing surface matched with the tapered surface of the second valve 39, a second return spring 41, and a second spring adjusting nut 44.

[0061] In another preferred embodiment, a liquid inlet joint 45 is connected to the lower end of the lower joint 43, and the liquid inlet joint 45 is provided with a liquid inlet hole 46 on the body.

[0062] In another specific embodiment, a multifunctional sampler for oil fields is composed of an upper half and a lower half.

[0063] In the upper half of the upper part has umbrella-shaped step sliding sleeve 11, umbrella-shaped step sliding sleeve 1 top has downward through the wire hole 2, umbrella-shaped step sliding sleeve 1 in turn installed with support spring 3 and non-removable rope cap 4, non-removable rope cap 4 body has transversely through the knot hole 6, non-removable rope cap 4 body top center to the knot hole 6 open longitudinal groove 5, non-removable rope cap 4 lower part is installed with switch control rod 8, switch control rod 8 is sleeved with connecting wire sleeve 7, which is screwed on the lower end of umbrella-shaped step sliding sleeve 1, switch control rod 8 is sleeved with return spring outside, return spring above has positioning pin 9 fixed outside switch control rod 8, switch control rod 8 outside has upper outer cylinder 11 and lower outer cylinder 13 respectively, pressure cap 10 with longitudinal key groove is installed on the upper end of upper outer cylinder 11;

[0064] Lower outer cylinder 13 has screw thread inside both ends, lower outer cylinder 13 has lock block 17 movable groove symmetrically opened on both sides of the middle part, two lock block 17 movable grooves are respectively installed with lock block 17;

[0065] The body of lower outer cylinder 13 corresponding to the middle of spring fixing hole 17-3 of two lock blocks 17 has spring positioning hole designed to pass through to fix release spring 16; The body of lower outer cylinder 13 is symmetrically opened with vertical L-shaped liquid inlet groove 19;

[0066] The upper end of two lock blocks 17 has same cutting surface 17-1 and lock block mounting hole 17-2, two lock blocks 17 are fixed in lock block 17 movable groove in the middle part of lower outer cylinder 13 through pin 14 screwed into pin 14 hole and lock block mounting hole 17-2 on the upper part of the body;

[0067] Lock block 17 body has spring fixing hole 17-3 and release spring 16 for installing release spring 16, triangular outer positioning claw 17-4 is outside the lower end of lock block 17 body, lock head 17-5 of the lower end of lock block 17 body can be spread apart;

[0068] There is first valve 26 on the upper part of the lower half, first valve 26 has lower trumpet mouth sleeve 28, trumpet mouth sleeve 28 body upper part is installed with rotatable first helical impeller 27, first valve 26 is conical, conical part is installed with first sealing ring 25, first valve 26 has gap for fluid to pass between upper joint 22 under the compression of first return spring 23, first valve 26 upper part is first adjusting screw 24, first adjusting screw 24 is in turn installed with upper joint 22, first return spring 23, first return spring 23 adjusting nut 21, adjustable control sleeve 20;

[0069] The center of the upper joint 22 is a through hole, the lower end of the upper joint 22 has a tapered sealing surface matched with the tapered surface of the first valve 26, and the lower part of the upper joint 22 is screwed with the sampler outer cylinder 36, the lower joint 43 and the liquid inlet joint 45 in sequence; the lower part of the upper joint 22 is screwed with the sampler outer cylinder 36, the lower joint 43 and the liquid inlet joint 45 in sequence;

[0070] The sampler outer cylinder 36 is installed with a locking base 34, the body of the locking base 34 has external threads for connecting the inner wall of the sampler outer cylinder 36 and the upper end of the sampler inner cylinder, the center of the body of the locking base 34 is provided with a threaded hole as a locking sleeve mounting hole 32, the upper end of the threaded hole is installed with a locking sleeve 30 with multiple longitudinal cutting slots 29, and the lower end of the body of the locking base 34 is screwed with the sampler inner cylinder 35;

[0071] The upper end of the sampler inner cylinder has internal threads, the inside of the sampler inner cylinder is installed with a central tube 35-1 through which the central transmission control link 37 can pass, there is a liquid inlet annular cavity 35-2 between the central tube 35-1 and the inner wall of the sampler inner cylinder, the lower end of the sampler inner cylinder is closed except the central tube 35-1, and the internal threads of the upper end of the sampler inner cylinder are screwed at the threads of the lower end of the locking base 34;

[0072] Multiple sample inlet holes 33 are made around the threaded hole in the center of the body of the locking base 34, the sample inlet holes 33 communicate with the liquid inlet annular cavity 35-2 between the inner wall of the sampler inner cylinder;

[0073] The upper end part 31 of the central transmission control link is in the shape of a jujube core, the upper end part 31 of the central transmission control link is located in the locking sleeve 30 at the upper end of the locking base 34, and the upper part of the central transmission control link 37 is located in the central tube 35-1 inside the sampler inner cylinder;

[0074] The second spiral impeller 38 is sleeved between the central transmission control link 37 and the second valve 39, the lower part of the second spiral impeller 38 is tapered, the tapered part is installed with a second sealing ring 40, the second valve 39 is compressed by the first return spring 23 and is between the lower joint 43, and there is a gap through which fluid can pass, the second adjusting screw 42 at the lower part of the second valve 39 is installed with the lower joint 43, the second return spring 41 and the second spring adjusting nut 44 in sequence; the center of the lower joint 43 is a through hole, the upper end of the lower joint 43 has a tapered sealing surface matched with the tapered surface of the second valve 39, and the lower part of the lower joint 43 is screwed with the lower liquid inlet joint 45, and the body of the liquid inlet joint 45 has symmetrical liquid inlet holes 46;

[0075] The upper half and the lower half of the sampler are connected together through the lower outer cylinder 13 and the upper joint 22.

[0076] Before using the device, first pull up the switch control rod 8 together with the upper return spring 12 on the switch control rod 8, when the positioning pin 9 on the switch control rod 8 is pulled along the key groove to the upper part of the pressure cap 10 with longitudinal key groove, rotate a certain angle, the positioning pin 9 is clamped on the upper end face of the non-key groove part of the pressure cap 10 with longitudinal key groove. At this time, the upper return spring 12 on the switch control rod 8 is in a compressed state. Because of the blockage of the positioning pin 9, the switch control rod 8 will not go down due to the action of the upper return spring 12.

[0077] Then, compress the second return spring 41 under the second adjusting screw 42 of the second valve 39 in the lower joint 43, make the center transmission control link 37 act upward, when the center transmission control link upper end part 31 in the locking sleeve 30 shows the date kernel-shaped head, press down the adjustable control sleeve 20, the adjustable control sleeve 20 together with the first adjusting screw 24, the first return spring adjusting nut 21 compresses the first return spring 23, the trumpet sleeve 28 at the lower part of the first valve 26 moves downward, makes the locking sleeve 30 enter the trumpet sleeve 28, and folds the two locking blocks 17, so that the lower end locking head 17-5 completely enters the lower part of the outer cylinder 13 body, and the locking head 17-5 is pressed on the top end of the adjustable control sleeve 20 and cannot go up. At this time, there are gaps between the first valve 26 and the upper joint 22, and between the second valve 39 and the lower joint 43 for fluid to pass through.

[0078] Rotate the switch control rod 8, make the positioning pin 9 on the switch control rod 8 go down along the key groove, until the lower end of the switch control rod 8 completely enters the cutting surface 17-1 inside the upper end of the two locking blocks 17, the two locking block cutting surfaces 17-1 are separated by the switch control rod 8, and the lower end locking head 17-5 cannot be opened. At this time, the sampler enters the closed state.

[0079] Remove the umbrella-shaped step sliding sleeve 1, pass the steel wire through the steel wire passing hole 2 and the supporting spring 3 of the umbrella-shaped step sliding sleeve 1 in turn, install the steel wire rope knot after the knot is made, put the made rope knot head into the rope knot hole 6 transversely through the body of the non-removable rope cap 4, put the upper steel wire of the rope knot into the longitudinal groove 5 from the center of the top end of the non-removable rope cap 4 body to the rope knot hole 6, and then put the umbrella-shaped step sliding sleeve 1 on the outside of the non-removable rope cap 4 body, and then connect with the connecting wire sleeve 7. Because the steel wire passing hole 2 of the umbrella-shaped step sliding sleeve 1 and the longitudinal groove 5 from the center of the top end of the non-removable rope cap 4 body to the rope knot hole are on a straight line, and the gap between the umbrella-shaped step sliding sleeve 1 and the non-removable rope cap 4 body is smaller than the diameter of the steel wire, therefore, the steel wire rope knot cannot come out, when replacing the second sampling device for sampling, only need to remove the umbrella-shaped step sliding sleeve 1, take out the rope knot, and install it on the next sampling device, without making new rope knot, effectively saving the time of construction preparation. At this time, the sampler is in the open state, and the preparation of the sampler downhole is completed.

[0080] When using the inertia closing mode: connect the rope head of the oilfield multifunctional sampler to the steel wire of the ground winch drum, and lower it into the well for sampling. The steam in the well flows through the L-shaped liquid inlet groove 19, the gap between the first valve 26 and the upper joint 22 to the first spiral impeller 27 on the horn sleeve 28, the first spiral impeller 27 rotates under the impact of the steam flow, and part of the water with higher specific gravity is thrown to the inner wall of the outer cylinder of the sampler, and flows into the inner cylinder 35 of the sampler along the inner wall through the sampling hole 33, the remaining fluid enters the gap between the central pipe and the central transmission control link, and flows out through the gap between the second valve and the lower joint. When reaching the sampling depth and time, quickly brake the ground winch brake to achieve emergency stop, at this time the upper half of the switch control rod, the rope head joint, the umbrella-shaped step sliding sleeve, the supporting spring, the connecting wire sleeve stop, and the other parts of the sampler continue to move downward. When overcoming the elastic force of the return spring, the switch control rod is out of the cutting surface position of the upper end of the two locking blocks, the two locking blocks lose the block of the switch control rod, the locking heads of the two locking blocks are opened outward under the action of the release spring, the adjustable control sleeve loses the block of the two locking heads, and under the action of the first return spring, the adjustable control sleeve moves upward together with the first valve and the horn sleeve, so that the first valve enters the lower joint to achieve the closing of the first valve. At the same time, after the locking sleeve is out of the center hole of the first valve lower sleeve, the jujube-shaped head at the top end of the central transmission control link is forced to open under the action of the return spring, and after losing the restraint of the locking sleeve, the central transmission control link moves downward together with the second valve, so that the second valve enters the lower joint to achieve the closing of the lower valve, and the sampling is completed.

[0081] When using the hammer-operated shut-off method: Connect the rope cap of this multi-functional oilfield sampler to the steel wire on the surface winch drum, lower it into the well to be sampled, and the steam in the well flows through the L-shaped inlet channel, through the gap between the first valve and the upper connector, and reaches the impeller on the trumpet-shaped sleeve. The impeller rotates under the impact of the steam flow, throwing some of the heavier water towards the inner wall of the sampler outer cylinder 36, and then flows into the sampler inner cylinder 35 through the inlet hole 33 along the inner wall. The remaining fluid enters the gap between the central tube 35-1 and the central drive control linkage 37, and flows out through the gap between the second valve 39 and the lower connector 43. When the sampling depth and time are reached, the hammer is released from the wellhead. The hammer slides down the steel wire and hits the umbrella-shaped step slide sleeve 1 at the top of the multi-functional sampler for oil fields. After the umbrella-shaped step slide sleeve 1 overcomes the elastic force of the support spring 3, the connecting thread sleeve 7 at the lower end quickly hits the pressure cap 10 with the longitudinal keyway. At this time, the upper part of the switch control rod 8 and the non-disassembly rope cap 4 joint stop moving, and the other parts of the sampler continue to descend together. When the upper return spring 12 is overcome, the switch control lever 8 disengages from the cutting surface 17-1 position at the upper end of the two locking blocks 17. The two locking blocks 17 lose the obstruction of the switch control lever 8, and the locking heads 17-5 of the two locking blocks 17 open outward under the action of the release spring 16. After the adjustable control sleeve 20 loses the obstruction of the two locking heads 17, under the action of the first return spring 23, the adjustable control sleeve 20, together with the first valve 26 and the flared sleeve 28, moves upward quickly, so that the first valve 26 enters the lower connector 43, thereby closing the first valve 26. At the same time, after the locking sleeve 30 disengages from the center hole of the lower sleeve of the first valve 26, the date-shaped head of the upper end 31 of the center transmission control link forces the locking sleeve 30 to open under the action of the first return spring 23. After losing the restraint of the locking sleeve 30, the center transmission control link 37 and the second valve 39 move downward together, so that the second valve 39 enters the lower connector 43, thereby closing the lower valve.

[0082] When using the impact top closing mode: the rope cap of the oilfield multifunctional sampler is connected to the steel wire on the ground winch drum, and when the wellhead sample needs to be obtained, the steam in the well flows through the L-shaped liquid inlet groove 19, the gap between the first valve 26 and the upper joint 22 to the first spiral impeller 27 on the bellmouth sleeve 28, the first spiral impeller 27 rotates under the impact of the steam flow, and part of the water with higher specific gravity is thrown to the inner wall of the outer cylinder 36 of the sampler, and then flows into the inner cylinder 35 of the sampler along the inner wall through the sampling hole. The remaining fluid enters the gap between the central pipe 35-1 and the central transmission control link 37, and then flows out through the gap between the second valve 39 and the lower joint 43. When the sampling time arrives, pull the steel wire connected to the sampler, the top end of the umbrella-shaped step sliding sleeve 1 of the oilfield multifunctional sampler impacts the lower end of the blowout preventer, the umbrella-shaped step sliding sleeve 1 overcomes the elastic force of the supporting spring 3, and then the lower end of the connecting wire sleeve 7 quickly impacts the pressure cap 10 with a longitudinal key groove. At this time, the upper half of the switch control rod 8 and the detachable rope cap 4 joint stop moving, and the other parts of the sampler continue to move downward together. When the elastic force of the upper return spring 12 is overcome, the switch control rod 8 is out of the cutting surface 17-1 on the upper end of the two locking blocks 17, the two locking blocks 17 lose the block of the switch control rod 8, and the two locking blocks 17 are immediately opened outward under the action of the release spring 16. After the adjustable control sleeve 20 loses the block of the two locking blocks 17, the adjustable control sleeve 20 moves upward quickly together with the first valve 26, the bellmouth sleeve 28, and the first return spring 23, so that the first valve 26 enters the first conical valve seat, the first valve is closed, and at the same time, the locking sleeve 30 is out of the central hole of the lower sleeve of the first valve 26. The jujube core-shaped head of the upper end of the central transmission control link 31 is forced to open the locking sleeve 30 under the action of the first return spring 23, and after losing the restraint of the locking sleeve 30, the central transmission control link 8 moves downward together with the second valve 39, so that the second valve 39 enters the second conical valve seat, the lower valve is closed, and the sampling is completed.

[0083] Adjustment of the sampler when different samples need to be obtained: when liquid samples need to be obtained, the sampling inner cylinder at the lower end of the locking base 34 can be removed as needed to achieve the purpose of obtaining other liquid samples.

[0084] Confirmation of whether the above three control sampler sample cylinders are closed: in order to determine whether the sampler sample cylinder is closed, the sampler needs to be lowered, and the outer 17-4 positioning claws at the lower end of the two opened locking blocks 17 will slide down along the pipe wall. When entering the middle gap of the two pipe joints at the pipe collar, the outer positioning claws 17-4 enter the middle gap of the two pipe joints, and the sampler is forced to stop moving downward, so that it can be confirmed that the sample cylinder has been closed, and the operation can be started. Otherwise, the sampler is slightly lifted again, the ground winch brake is quickly tightened to achieve emergency stop, and the purpose of confirming whether the sample cylinder is closed on the ground is achieved.

[0085] The various embodiments described in this specification are presented by way of example, and each embodiment describes a specific implementation of the application. The embodiments are not intended to limit the scope of the application, which is defined by the appended claims and their equivalents.

[0086] The terms "upper," "lower," "inner," "outer," and the like, if present in the specification and the claims, are used for relative positions, and are not to be necessarily taken in an absolute sense. It will be understood that the drawings are not necessarily to scale, and that the embodiments of the application described herein can be implemented in a variety of orders not necessarily shown or described herein. Furthermore, the terms "comprise," "comprising," "include," "including," and "has," "having," and variants thereof are intended to cover a non-exclusive inclusion.

[0087] The above description of disclosed embodiments of the application allows skilled in the art to carry out or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-functional sampler for use in oil fields, characterized by, It is composed of an upper half and a lower half; the upper half includes an umbrella-shaped stepped sleeve, the umbrella-shaped stepped sleeve is installed at the lower end of the switch control rod, the switch control rod is movably installed in the upper outer cylinder and the lower outer cylinder, the upper outer cylinder is provided with an upper return spring matched with the switch control rod, and the lower outer cylinder is provided with a liquid inlet groove and a locking block; The lower half includes a sampler outer cylinder, the upper end and the lower end of the sampler outer cylinder are respectively provided with an upper joint and a lower joint, the lower end of the upper joint is provided with a first valve matched in the sampler outer cylinder, an adjustable control sleeve is arranged above the first valve, and a sampler inner cylinder is arranged below the first valve, the sampler inner cylinder is provided with a central transmission control link matched with the first valve; the upper end of the lower joint is internally provided with a second valve, and the lower end is connected with a liquid inlet joint; The locking block is associated with the switch control rod and the adjustable control sleeve to cooperatively realize the opening and closing of the sampler; The upper half and the lower half are connected through the lower outer cylinder and the upper joint, the top end of the umbrella-shaped stepped sleeve is provided with a steel wire penetrating hole penetrating downward, a support spring and a non-removable rope cap are sequentially installed in the umbrella-shaped stepped sleeve, the non-removable rope cap body is provided with a rope knot hole penetrating transversely, a longitudinal groove is opened from the center of the top end of the non-removable rope cap to the rope knot hole, the switch control rod is installed below the non-removable rope cap, a connecting wire sleeve is sleeved on the switch control rod and connected with the lower end of the umbrella-shaped stepped sleeve, a return spring is sleeved on the outside of the switch control rod, a positioning pin is fixed on the outside of the switch control rod above the return spring, and a pressing cap with a longitudinal key groove is installed at the upper end of the upper outer cylinder; The lower end of the upper outer cylinder is internally provided with a screw thread, and the middle part of the lower outer cylinder is symmetrically provided with a locking block movable slot matched with the locking block on both sides; The upper part of the locking block is provided with a cutting surface matched with the switch control rod and a locking block mounting hole fixed by a cooperation pin, the middle part is provided with a spring positioning hole and a spring fixing hole matched with the release spring, and the lower part is provided with an outer positioning claw and a locking head. The lower part of the first valve is provided with a bell mouth sleeve, the first spiral impeller is rotatably installed on the upper part of the bell mouth sleeve body, the first valve is conical, the conical part is provided with a first sealing ring, the upper part of the first valve is provided with a first adjusting screw, and the first adjusting screw is sequentially provided with an upper joint, a first return spring, a first return spring adjusting nut and an adjustable control sleeve, and the first valve has a gap for fluid between the upper joint under the compression of the first return spring; The center of the upper joint is a through hole, the lower end of the upper joint is internally provided with a conical sealing surface matched with the conical surface of the first valve, and the upper joint is sequentially provided with a sampler outer cylinder, a lower joint and a liquid inlet joint at the lower part; The sampler outer cylinder is internally provided with a locking base, the locking base body is provided with an external thread for connecting the inner wall of the sampler outer cylinder and the sampler inner cylinder, the center of the locking base body is provided with a threaded hole penetrating through, and the upper end of the threaded hole is provided with a locking sleeve provided with multiple longitudinal cutting slots. The sampling inner cylinder is provided with a center tube for the center transmission control link to pass through, and a liquid inlet annular cavity is arranged between the center tube and the inner wall of the sampling inner cylinder; A plurality of sample inlet holes are arranged around the center threaded hole of the locking base body, and the sample inlet holes are communicated with the liquid inlet annular cavity; The upper end of the center transmission control link is in the shape of a date pit, the upper end of the center transmission control link passes through the center tube inside the sampling inner cylinder and is located in the locking sleeve above the locking base; A second spiral impeller is arranged between the center transmission control link and the second valve, the second valve at the lower part of the second spiral impeller is a tapered part, a second sealing ring is arranged at the tapered part, and the second valve has a gap for fluid to pass through between the compression of the first return spring and the lower joint; A second adjusting screw is arranged below the second valve, and a lower joint is sequentially arranged on the second adjusting screw, the center of the lower joint is a through hole, the inner wall of the upper end of the lower joint is provided with a tapered sealing surface matched with the tapered surface of the second valve, a second return spring and a second spring adjusting nut.

2. The multifunctional oilfield sampler of claim 1, wherein, The lower end of the lower joint is connected with a liquid inlet joint, and the liquid inlet joint body is provided with a liquid inlet hole.

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